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\n  \n 2025\n \n \n (19)\n \n \n
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\n \n\n \n \n \n \n \n \n A multi-phase SPH model for simulating the floating OWC-breakwater integrated systems.\n \n \n \n \n\n\n \n Zhang, Y.; Pan, J.; Song, M.; Jiang, H.; He, F.; Huang, C.; and Shakibaeinia, A.\n\n\n \n\n\n\n Coastal Engineering, 197. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244917473823 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A multi-phase SPH model for simulating the floating OWC-breakwater integrated systems},\njournal = {Coastal Engineering},\nauthor = {Zhang, Yifan and Pan, Jiapeng and Song, Mengxia and Jiang, Haonan and He, Fang and Huang, Can and Shakibaeinia, Ahmad},\nvolume = {197},\nyear = {2025},\nissn = {03783839},\nabstract = {<div data-language="eng" data-ev-field="abstract">Oscillating water column (OWC) devices, a type of wave energy converter, have aroused great interest of researchers in the past decades due to their straightforward configuration and superior durability. In this work, an experiment on a fixed bottom-mounted OWC device is first conducted, and then the multi-phase Smoothed Particle Hydrodynamics (SPH) method with the adaptive spacing resolution technology is developed and applied into the simulation of the OWC simulation. In order to calculate the pressure in the chamber of OWC accurately, two improvements are made to the computational model: 1) a modified gas-related far-field boundary condition; 2) particle refinement near the OWC slot. The numerical results agree with the experimental results, indicating an accurate simulation of both the pneumatic and hydrodynamic process in fixed OWC devices. Subsequently, mooring systems and elastic models are validated and then coupled with the multi-phase SPH-OWC. Utilizing the proposed SPH model, a floating OWC-breakwater system with an elastic curtain below is numerically simulated. Results show that the current multi-phase SPH model can be used to investigate hydrodynamic characteristics of complex floating OWC-breakwater systems.<br/></div> © 2024 Elsevier B.V.},\nkey = {Wave energy conversion},\n%keywords = {Floating breakwaters;Mooring;Multiphase flow;Oscillating flow;},\n%note = {Computational modelling;Floating oscillating water columns;Integrated systems;Multi-phase flows;Oscillating water column;Oscillating water column devices;Smoothed particle hydrodynamics;Smoothed particle hydrodynamics methods;Smoothed particle hydrodynamics modeling;Wave energy converters;},\nURL = {http://dx.doi.org/10.1016/j.coastaleng.2024.104658},\n} \n\n\n
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Oscillating water column (OWC) devices, a type of wave energy converter, have aroused great interest of researchers in the past decades due to their straightforward configuration and superior durability. In this work, an experiment on a fixed bottom-mounted OWC device is first conducted, and then the multi-phase Smoothed Particle Hydrodynamics (SPH) method with the adaptive spacing resolution technology is developed and applied into the simulation of the OWC simulation. In order to calculate the pressure in the chamber of OWC accurately, two improvements are made to the computational model: 1) a modified gas-related far-field boundary condition; 2) particle refinement near the OWC slot. The numerical results agree with the experimental results, indicating an accurate simulation of both the pneumatic and hydrodynamic process in fixed OWC devices. Subsequently, mooring systems and elastic models are validated and then coupled with the multi-phase SPH-OWC. Utilizing the proposed SPH model, a floating OWC-breakwater system with an elastic curtain below is numerically simulated. Results show that the current multi-phase SPH model can be used to investigate hydrodynamic characteristics of complex floating OWC-breakwater systems.
© 2024 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Buffeting-Induced Fatigue Damage Assessment of a Long-Span Bridge under a Changing Climate Scenario.\n \n \n \n \n\n\n \n Allard, L.; and Snaiki, R.\n\n\n \n\n\n\n Journal of Bridge Engineering, 30(3). 2025.\n \n\n\n\n
\n\n\n\n \n \n \"Buffeting-InducedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20250117625089 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Buffeting-Induced Fatigue Damage Assessment of a Long-Span Bridge under a Changing Climate Scenario},\njournal = {Journal of Bridge Engineering},\nauthor = {Allard, Laurent and Snaiki, Reda},\nvolume = {30},\nnumber = {3},\nyear = {2025},\nissn = {10840702},\nabstract = {<div data-language="eng" data-ev-field="abstract">With the continuous increase of bridge spans, wind-induced vibrations will pose serious problems to structural integrity and serviceability. Among the many vibration sources of long-span bridges, buffeting, which results from impinging turbulence, affects the fatigue life of the bridge structure, and when coupled with other wind-induced loads, might lead to severe structural problems. With climate change, buffeting-induced fatigue might significantly increase due to higher wind speeds and turbulence intensities. Therefore, it is important to assess the cumulative fatigue damage generated by buffeting loads under changing climate scenarios. In this study, the buffeting response of a single-span suspension bridge is investigated in the frequency domain under the Worst-case climate scenario RCP8.5. A simplified bridge model will be used to capture key dynamic and aerodynamic characteristics, with a time-dependent Weibull distribution accounting for nonstationarity in wind speed. The analysis of fatigue damage accumulation under buffeting will involve the rain-flow cycle counting method and the Palmgren–Miner damage law. Three Canadian cities, Montreal, Toronto, and Vancouver, will be included in the study to assess how location, along with the climate scenario, influences the life-cycle buffeting-induced accumulated damage over a 100-year period.<br/></div> © 2024 American Society of Civil Engineers.},\nkey = {Buffeting},\n%keywords = {Fatigue damage;Pressure vessels;Suspension bridges;Vibration analysis;Weibull distribution;},\n%note = {Author keyword: buffeting;Bridge spans;Bridge structures;Buffeting-induced fatigue;Changing climate;Climate scenarios;Fatigue damage assessment;Long-span bridge;Vibration sources;Wind induced vibrations;},\nURL = {http://dx.doi.org/10.1061/JBENF2.BEENG-6840},\n} \n\n\n
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With the continuous increase of bridge spans, wind-induced vibrations will pose serious problems to structural integrity and serviceability. Among the many vibration sources of long-span bridges, buffeting, which results from impinging turbulence, affects the fatigue life of the bridge structure, and when coupled with other wind-induced loads, might lead to severe structural problems. With climate change, buffeting-induced fatigue might significantly increase due to higher wind speeds and turbulence intensities. Therefore, it is important to assess the cumulative fatigue damage generated by buffeting loads under changing climate scenarios. In this study, the buffeting response of a single-span suspension bridge is investigated in the frequency domain under the Worst-case climate scenario RCP8.5. A simplified bridge model will be used to capture key dynamic and aerodynamic characteristics, with a time-dependent Weibull distribution accounting for nonstationarity in wind speed. The analysis of fatigue damage accumulation under buffeting will involve the rain-flow cycle counting method and the Palmgren–Miner damage law. Three Canadian cities, Montreal, Toronto, and Vancouver, will be included in the study to assess how location, along with the climate scenario, influences the life-cycle buffeting-induced accumulated damage over a 100-year period.
© 2024 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Wind design considerations for base-isolated post-disaster steel buildings in moderate seismic regions.\n \n \n \n \n\n\n \n Athanasiou, A.; Tirca, L.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 226. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"WindPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20250117624487 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind design considerations for base-isolated post-disaster steel buildings in moderate seismic regions},\njournal = {Journal of Constructional Steel Research},\nauthor = {Athanasiou, Anastasia and Tirca, Lucia and Stathopoulos, Ted},\nvolume = {226},\nyear = {2025},\nissn = {0143974X},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents a performance-based design methodology applied to proportion post-disaster steel braced frame buildings equipped with base isolation under recurring winds and earthquakes. The case study is a 15-storey hospital steel braced-frame building located in Montreal, Canada, where both wind and earthquake loads are critical. The base isolation system is composed of 16 lead rubber bearings placed at the base of the braced frame columns and 29 friction sliders under the gravity columns. Finite element models of the fixed-base and base-isolated lateral force resisting systems that account for geometrical and material nonlinearities, are developed in OpenSees. The building models are subjected to a set of spectrum-compatible ground motions, as well as a set of wind time-history series that are generated randomly from wind tunnel data available at the Tokyo Polytechnic University aerodynamic database. Nonlinear wind and earthquake response history analyses provide estimates of the structural performance in terms of floor accelerations, interstorey drifts, residual drifts, and isolator shear demands at the linear and nonlinear-near collapse range. The findings demonstrate the effectiveness of base isolation to mitigate damage under lateral loads. The paper also reveals the need to integrate multiple hazards in design, relax the stringent service and strength wind criteria, account for the inherent system overstrength and allow for limited ductility in displacement-controlled members in wind design.<br/></div> © 2024 The Authors},\nkey = {Structural frames},\n%keywords = {Buildings;Columns (structural);Earthquake effects;Mortar;Seismic design;Seismic response;Steel structures;Structural analysis;Structural dynamics;Wind stress;},\n%note = {Base isolation;Frame buildings;Multi-hazard excitation;Multi-hazards;Performance based design;Post disasters;Post-disaster steel building;Steel braced frames;Steel buildings;Wind design;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2024.109287},\n} \n\n\n
\n
\n\n\n
\n
This paper presents a performance-based design methodology applied to proportion post-disaster steel braced frame buildings equipped with base isolation under recurring winds and earthquakes. The case study is a 15-storey hospital steel braced-frame building located in Montreal, Canada, where both wind and earthquake loads are critical. The base isolation system is composed of 16 lead rubber bearings placed at the base of the braced frame columns and 29 friction sliders under the gravity columns. Finite element models of the fixed-base and base-isolated lateral force resisting systems that account for geometrical and material nonlinearities, are developed in OpenSees. The building models are subjected to a set of spectrum-compatible ground motions, as well as a set of wind time-history series that are generated randomly from wind tunnel data available at the Tokyo Polytechnic University aerodynamic database. Nonlinear wind and earthquake response history analyses provide estimates of the structural performance in terms of floor accelerations, interstorey drifts, residual drifts, and isolator shear demands at the linear and nonlinear-near collapse range. The findings demonstrate the effectiveness of base isolation to mitigate damage under lateral loads. The paper also reveals the need to integrate multiple hazards in design, relax the stringent service and strength wind criteria, account for the inherent system overstrength and allow for limited ductility in displacement-controlled members in wind design.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Shear capacity of single- and double-layered gypsum board to steel stud screw connections in non-structural partitions.\n \n \n \n \n\n\n \n Mohebbi, S.; Bazarchi, E.; and Lamarche, C.\n\n\n \n\n\n\n Thin-Walled Structures, 208. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"ShearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20245217602228 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shear capacity of single- and double-layered gypsum board to steel stud screw connections in non-structural partitions},\njournal = {Thin-Walled Structures},\nauthor = {Mohebbi, Saeed and Bazarchi, Ehsan and Lamarche, Charles-Philippe},\nvolume = {208},\nyear = {2025},\nissn = {02638231},\nabstract = {<div data-language="eng" data-ev-field="abstract">Gypsum steel-stud partition walls are composed of light-gauge, cold-formed steel studs and gypsum boards attached with self-drilling screws. These non-structural elements are commonly used in volumetric modular building structures serving as partitions or exterior walls. Volumetric modular building structures are prefabricated, prefinished constructions where three-dimensional units, known as modules, are built in a factory and then transported to the construction site where they are placed and interconnected. The volumetric modules experience different loading scenarios during handling and transportation. While the modules may be designed to resist transportation and handling loads structurally, damage to nonstructural elements, such as gypsum board to stud connections, can still occur even under lower amplitude excitations. These non-structural damages, if not avoided, will require additional on-site repairs, leading to an increase in the overall costs of modular projects. This study investigates the shear capacity and damage mechanisms of gypsum board to steel stud screw connections. A series of experimental tests are performed to determine the capacity of these connections varying with the number of gypsum board layers (one- or two-layer), fastener edge distance and direction of loading (parallel or perpendicular to the edge). Finally, an analytical formulation was proposed to estimate the shear capacity of these connections. Results indicate that the distance of fasteners to the gypsum board edges dramatically affects the behavior of these connections. The connection capacity at the damage state and the failure modes can fairly be predicted through the proposed analytical approach, showing a reasonable match with experimental results.<br/></div> © 2024 Elsevier Ltd},\nkey = {Studs (fasteners)},\n%keywords = {Connectors (structural);Mortar;Self drilling screws;Studs (structural members);},\n%note = {Building structure;Edge distance;Gypsum board;Layered gypsum board;Modular building structure;Modular buildings;Non-structural;Non-structural partition;Screw connections;Shear tests;},\nURL = {http://dx.doi.org/10.1016/j.tws.2024.112844},\n} \n\n\n
\n
\n\n\n
\n
Gypsum steel-stud partition walls are composed of light-gauge, cold-formed steel studs and gypsum boards attached with self-drilling screws. These non-structural elements are commonly used in volumetric modular building structures serving as partitions or exterior walls. Volumetric modular building structures are prefabricated, prefinished constructions where three-dimensional units, known as modules, are built in a factory and then transported to the construction site where they are placed and interconnected. The volumetric modules experience different loading scenarios during handling and transportation. While the modules may be designed to resist transportation and handling loads structurally, damage to nonstructural elements, such as gypsum board to stud connections, can still occur even under lower amplitude excitations. These non-structural damages, if not avoided, will require additional on-site repairs, leading to an increase in the overall costs of modular projects. This study investigates the shear capacity and damage mechanisms of gypsum board to steel stud screw connections. A series of experimental tests are performed to determine the capacity of these connections varying with the number of gypsum board layers (one- or two-layer), fastener edge distance and direction of loading (parallel or perpendicular to the edge). Finally, an analytical formulation was proposed to estimate the shear capacity of these connections. Results indicate that the distance of fasteners to the gypsum board edges dramatically affects the behavior of these connections. The connection capacity at the damage state and the failure modes can fairly be predicted through the proposed analytical approach, showing a reasonable match with experimental results.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Modal dynamic and response spectrum analyses of rectangular flexible water containing structures through modified ground motion accelerations.\n \n \n \n \n\n\n \n Bouaanani, N.; and Kouhdasti, R.\n\n\n \n\n\n\n Engineering Structures, 325. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"ModalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20244917486373 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modal dynamic and response spectrum analyses of rectangular flexible water containing structures through modified ground motion accelerations},\njournal = {Engineering Structures},\nauthor = {Bouaanani, Najib and Kouhdasti, Ramtin},\nvolume = {325},\nyear = {2025},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">This article introduces a new approach for the assessment of the seismic behaviour of water containing structures such as storage tanks or navigation lock chambers. The novelty of the proposed approach lies in its integration of earthquake-induced water impulsive effects into a modified version of the input ground motion acceleration and its response spectrum. The modified time–history and spectral ground motion accelerations can then be directly applied to a numerical model of the empty container built using standard finite elements, thus eliminating the need for specialized software capable of modelling fluid domains and dynamic fluid–structure interactions. The formulation and procedures of the proposed methods are detailed and showcased through application to the seismic analysis of two illustrative examples of a rectangular water storage tank and an asymmetrical navigation lock chamber subjected each to two ground motion accelerations. The results are discussed to highlight how the proposed techniques effectively dissect hydrodynamic effects along the contributions of each vibration mode. Key parameters such as displacements, shear forces, and stresses are evaluated, and their modal and total responses compared to those corresponding to empty containers to assess earthquake-induced hydrodynamic effects. The proposed approach is shown to be in excellent agreement with classical coupled solid-fluid finite element solutions.<br/></div> © 2024},\nkey = {Seismic response},\n%keywords = {Earthquake effects;Earthquake engineering;Induced Seismicity;Locks (on waterways);Structural analysis;Structural dynamics;Vibration analysis;Water tanks;},\n%note = {Dynamic modal time–history analyze;Finite element;Fluid-structure interaction;Ground-motion;Hydrodynamic pressure;Modal response;Response spectrum analyses (RSA);Time history analysis;Water storage tanks;Water-containing structure;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2024.119266},\n} \n\n\n
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This article introduces a new approach for the assessment of the seismic behaviour of water containing structures such as storage tanks or navigation lock chambers. The novelty of the proposed approach lies in its integration of earthquake-induced water impulsive effects into a modified version of the input ground motion acceleration and its response spectrum. The modified time–history and spectral ground motion accelerations can then be directly applied to a numerical model of the empty container built using standard finite elements, thus eliminating the need for specialized software capable of modelling fluid domains and dynamic fluid–structure interactions. The formulation and procedures of the proposed methods are detailed and showcased through application to the seismic analysis of two illustrative examples of a rectangular water storage tank and an asymmetrical navigation lock chamber subjected each to two ground motion accelerations. The results are discussed to highlight how the proposed techniques effectively dissect hydrodynamic effects along the contributions of each vibration mode. Key parameters such as displacements, shear forces, and stresses are evaluated, and their modal and total responses compared to those corresponding to empty containers to assess earthquake-induced hydrodynamic effects. The proposed approach is shown to be in excellent agreement with classical coupled solid-fluid finite element solutions.
© 2024\n
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\n \n\n \n \n \n \n \n \n A novel method to calculate SSP-consistent remaining carbon budgets for the building sector: A case study of Canada.\n \n \n \n \n\n\n \n Breton, C.; Blanchet, P.; Amor, B.; and Pomponi, F.\n\n\n \n\n\n\n Building and Environment, 269. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20245217596510 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A novel method to calculate SSP-consistent remaining carbon budgets for the building sector: A case study of Canada},\njournal = {Building and Environment},\nauthor = {Breton, Charles and Blanchet, Pierre and Amor, Ben and Pomponi, Francesco},\nvolume = {269},\nyear = {2025},\nissn = {03601323},\nabstract = {<div data-language="eng" data-ev-field="abstract">Decarbonising the built environment is imperative to reach any net zero global GHG emissions targets. However, there remains uncertainty on how to orchestrate the mitigation efforts. Given a remaining global carbon budget, how should it be assigned both nationally and sectorally? Within this paper, we present a method and Python script to calculate country-specific carbon budgets using open-source datasets, for several scenarios and allocation methods. The script is run for Canada as a case study. Grounded in Canada's calculated carbon budget, tentative budget shares are explored for the Canadian building sector. The feasibility of meeting these budgets is broadly assessed using a streamlined calculation. Even under optimistic assumptions, the Canadian building sector is unlikely to meet its allocated budget share. Key limitations, data requirements and research avenues are highlighted to improve upon the presented approach.<br/></div> © 2024 The Author(s)},\nkey = {Zero-carbon},\n%keywords = {Carbon capture and utilization;Carbon cycle;Carbon sequestration;Kyoto Protocol;Low emission;Sustainable building;},\n%note = {Building stocks;Buildings sector;Carbon budgets;Case-studies;Climate change mitigation;Effort-sharing approach;Embodied carbons;Kayum identity;Operational emission;Sustainable building;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2024.112474},\n} \n\n\n
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Decarbonising the built environment is imperative to reach any net zero global GHG emissions targets. However, there remains uncertainty on how to orchestrate the mitigation efforts. Given a remaining global carbon budget, how should it be assigned both nationally and sectorally? Within this paper, we present a method and Python script to calculate country-specific carbon budgets using open-source datasets, for several scenarios and allocation methods. The script is run for Canada as a case study. Grounded in Canada's calculated carbon budget, tentative budget shares are explored for the Canadian building sector. The feasibility of meeting these budgets is broadly assessed using a streamlined calculation. Even under optimistic assumptions, the Canadian building sector is unlikely to meet its allocated budget share. Key limitations, data requirements and research avenues are highlighted to improve upon the presented approach.
© 2024 The Author(s)\n
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\n \n\n \n \n \n \n \n \n Performance-based wind design of tall mass timber buildings with coupled post-tensioned cross-laminated timber shear walls.\n \n \n \n \n\n\n \n Berile, N. K.; and Bezabeh, M. A.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 257. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"Performance-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20245117529712 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance-based wind design of tall mass timber buildings with coupled post-tensioned cross-laminated timber shear walls},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Berile, Nahom K. and Bezabeh, Matiyas A.},\nvolume = {257},\nyear = {2025},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">Engineered timber panels, such as cross-laminated timber (CLT), have enabled tall mass timber buildings to reach heights equivalent to mid-rise concrete and steel buildings. Tall mass timber buildings are lighter and more flexible than their concrete and steel equivalents, which makes their design wind-critical. The current prescriptive code-based design of main wind force resisting systems (MWFRSs) only considers buildings’ linear-elastic capacity, resulting in costly designs requiring commercially unavailable timber cross sections. This prevents engineers from fully utilizing timber as MWFRS and limits the height that mass timber buildings can reach. In performance-based wind design (PBWD), nonlinear-inelastic deformation in specially designed and detailed parts of MWFRSs enables an optimal design. However, controlling damage accumulation in structures can be challenging due to the substantial mean component of wind loads in the along-wind direction. To this end, self-centering systems such as coupled post-tensioned CLT (PT-CLT) walls can offer a solution. However, despite extensive analytical and experimental studies on the use of PT-CLT walls as seismic force-resisting systems, their use as MWFRSs has not been explored. Therefore, this paper proposes the use of PT-CLT walls as MWFRSs in tall mass timber buildings and develops a new PBWD approach for their design. To demonstrate the applicability of the PBWD approach, 8- and 16-story prototype mass timber buildings hypothetically located in Toronto, Canada, were designed using PBWD and load information from wind tunnel tests. For performance assessment, three-dimensional multi-spring numerical models were developed in OpenSeesPy and validated with full-scale quasi-static cyclic and shaking table experimental tests. Performance assessments using nonlinear response history analysis (NLRHA) under simultaneous along-, across-, and torsional-wind loads for 36 wind directions were carried out. The results indicate that the proposed PBWD framework is practical and effective for designing PT-CLT shear walls as MWFRSs in tall mass timber buildings.<br/></div> © 2024 The Authors},\nkey = {Wind tunnels},\n%keywords = {Aerodynamic loads;Concrete buildings;Concretes;Electric towers;Mortar;Seismic design;Shear walls;Structural analysis;Structural dynamics;Tall buildings;Wind stress;Window screens;Windows;Wooden buildings;},\n%note = {Cross laminated;Cross-laminated timber;Laminated timber;Main wind force resisting systems;Mass timber;Opensees;Performance based;Performance-based wind design;Post tensioned;Post-tensioned CLT wall;Self-centering system;Wind design;Wind-tunnel testing;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2024.105981},\n} \n\n\n
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Engineered timber panels, such as cross-laminated timber (CLT), have enabled tall mass timber buildings to reach heights equivalent to mid-rise concrete and steel buildings. Tall mass timber buildings are lighter and more flexible than their concrete and steel equivalents, which makes their design wind-critical. The current prescriptive code-based design of main wind force resisting systems (MWFRSs) only considers buildings’ linear-elastic capacity, resulting in costly designs requiring commercially unavailable timber cross sections. This prevents engineers from fully utilizing timber as MWFRS and limits the height that mass timber buildings can reach. In performance-based wind design (PBWD), nonlinear-inelastic deformation in specially designed and detailed parts of MWFRSs enables an optimal design. However, controlling damage accumulation in structures can be challenging due to the substantial mean component of wind loads in the along-wind direction. To this end, self-centering systems such as coupled post-tensioned CLT (PT-CLT) walls can offer a solution. However, despite extensive analytical and experimental studies on the use of PT-CLT walls as seismic force-resisting systems, their use as MWFRSs has not been explored. Therefore, this paper proposes the use of PT-CLT walls as MWFRSs in tall mass timber buildings and develops a new PBWD approach for their design. To demonstrate the applicability of the PBWD approach, 8- and 16-story prototype mass timber buildings hypothetically located in Toronto, Canada, were designed using PBWD and load information from wind tunnel tests. For performance assessment, three-dimensional multi-spring numerical models were developed in OpenSeesPy and validated with full-scale quasi-static cyclic and shaking table experimental tests. Performance assessments using nonlinear response history analysis (NLRHA) under simultaneous along-, across-, and torsional-wind loads for 36 wind directions were carried out. The results indicate that the proposed PBWD framework is practical and effective for designing PT-CLT shear walls as MWFRSs in tall mass timber buildings.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Fully coupled hydro-mechanical–chemical continuum modeling of fluid percolation through rock salt.\n \n \n \n \n\n\n \n Yevugah, I. D.; Kong, X.; Jacquey, A. B.; Green, C. P.; Hollander, H. M.; and Maghoul, P.\n\n\n \n\n\n\n International Journal of Rock Mechanics and Mining Sciences, 186. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"FullyPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20245117544403 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Fully coupled hydro-mechanical–chemical continuum modeling of fluid percolation through rock salt},\njournal = {International Journal of Rock Mechanics and Mining Sciences},\nauthor = {Yevugah, Ishmael Dominic and Kong, Xiang-Zhao and Jacquey, Antoine B. and Green, Christopher P. and Hollander, Hartmut M. and Maghoul, Pooneh},\nvolume = {186},\nyear = {2025},\nissn = {13651609},\nabstract = {<div data-language="eng" data-ev-field="abstract">In domal and bedded rock salt geothermal reservoirs, geochemical dissolution of the in-situ rock salt formation can alter fluid transport properties, thus impacting fluid flow. Coupled Hydro-mechanical–chemical (HMC) modeling is a useful tool to evaluate fluid transport through rock salt geothermal systems and to assess their economic potential. Existing continuum-based numerical simulation of fluid transport through rock salt relies on the polyhedral orientation of rock salt crystal boundaries as potential fluid pathways, employing a deformation-dependent permeability model to depict pressure-driven fluid flow through rock salt. However, this numerical approach is exclusively HM-coupled and overlooks the influence of halite dissolution/precipitation on the permeability model. This study extends the deformation-dependent permeability model to account for halite dissolution by adopting a reverse mineral growth approach. Using this extended (HMC-coupled) model, we capture the relevance of geochemical reactions on the response of rock salt formations undergoing pressure-driven fluid percolation. The resulting simulations predict a lower fluid pressure than the HM-coupled scenario, highlighting the impact of halite dissolution on fluid flow through rock salt.<br/></div> © 2024 The Authors},\nkey = {Percolation (fluids)},\n%keywords = {Exploratory geochemistry;Salt tectonics;},\n%note = {Dissolution precipitations;Fluid transport;Fluid-flow;Halite dissolution/precipitation;Hydro-mechanical;Hydro-mechanical–chemical;Permeability;Pressure-driven;Pressure-driven percolation;Rock salt;},\nURL = {http://dx.doi.org/10.1016/j.ijrmms.2024.105985},\n} \n\n\n
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In domal and bedded rock salt geothermal reservoirs, geochemical dissolution of the in-situ rock salt formation can alter fluid transport properties, thus impacting fluid flow. Coupled Hydro-mechanical–chemical (HMC) modeling is a useful tool to evaluate fluid transport through rock salt geothermal systems and to assess their economic potential. Existing continuum-based numerical simulation of fluid transport through rock salt relies on the polyhedral orientation of rock salt crystal boundaries as potential fluid pathways, employing a deformation-dependent permeability model to depict pressure-driven fluid flow through rock salt. However, this numerical approach is exclusively HM-coupled and overlooks the influence of halite dissolution/precipitation on the permeability model. This study extends the deformation-dependent permeability model to account for halite dissolution by adopting a reverse mineral growth approach. Using this extended (HMC-coupled) model, we capture the relevance of geochemical reactions on the response of rock salt formations undergoing pressure-driven fluid percolation. The resulting simulations predict a lower fluid pressure than the HM-coupled scenario, highlighting the impact of halite dissolution on fluid flow through rock salt.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Real-time dynamic layout optimization for floating offshore wind farm control.\n \n \n \n \n\n\n \n Jard, T.; and Snaiki, R.\n\n\n \n\n\n\n Ocean Engineering, 316. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"Real-timePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244917486285 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Real-time dynamic layout optimization for floating offshore wind farm control},\njournal = {Ocean Engineering},\nauthor = {Jard, Timothe and Snaiki, Reda},\nvolume = {316},\nyear = {2025},\nissn = {00298018},\nabstract = {<div data-language="eng" data-ev-field="abstract">Downstream wind turbines operating behind upstream turbines face significant performance challenges due to reduced wind speeds and increased turbulence. This leads to decreased wind energy production and higher dynamic loads on downwind turbines. Consequently, real-time monitoring and control have become crucial for improving wind farm performance. One promising solution involves optimizing wind farm layouts in real-time, taking advantage of the added flexibility offered by floating offshore wind turbines (FOWTs). This study explores a dynamic layout optimization strategy to minimize wake effects in wind farms while meeting power requirements. Three scenarios are considered: power maximization involving two different wind farm configurations and power set-point tracking. The methodology involves a centralized wind farm controller optimizing the layout, followed by wind turbine controllers to meet the prescribed targets. Each FOWT employs model predictive control to adjust aerodynamic thrust force. The control strategy integrates a dynamic wind farm model that considers floating platform motion and wake transport in changing wind conditions. In a case study with a 1x3 wind farm layout of 5 MW FOWTs, the results show a 25% increase in stable energy production compared to a static layout in 1 h for the first scenario. In the second scenario, desired power production was swiftly and consistently achieved. The final scenario demonstrates the control strategy's adaptability to various wind farm layouts.<br/></div> © 2024 The Authors},\nkey = {Offshore wind turbines},\n%keywords = {Offshore wind farms;Predictive control systems;Windmill;},\n%note = {Control strategies;Dynamic layout;Dynamic layout optimization;Floating offshore wind turbines;Layout optimization;Model-predictive control;Real-time dynamics;Wind farm;Wind farm control;Wind farm layouts;},\nURL = {http://dx.doi.org/10.1016/j.oceaneng.2024.119971},\n} \n\n\n
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Downstream wind turbines operating behind upstream turbines face significant performance challenges due to reduced wind speeds and increased turbulence. This leads to decreased wind energy production and higher dynamic loads on downwind turbines. Consequently, real-time monitoring and control have become crucial for improving wind farm performance. One promising solution involves optimizing wind farm layouts in real-time, taking advantage of the added flexibility offered by floating offshore wind turbines (FOWTs). This study explores a dynamic layout optimization strategy to minimize wake effects in wind farms while meeting power requirements. Three scenarios are considered: power maximization involving two different wind farm configurations and power set-point tracking. The methodology involves a centralized wind farm controller optimizing the layout, followed by wind turbine controllers to meet the prescribed targets. Each FOWT employs model predictive control to adjust aerodynamic thrust force. The control strategy integrates a dynamic wind farm model that considers floating platform motion and wake transport in changing wind conditions. In a case study with a 1x3 wind farm layout of 5 MW FOWTs, the results show a 25% increase in stable energy production compared to a static layout in 1 h for the first scenario. In the second scenario, desired power production was swiftly and consistently achieved. The final scenario demonstrates the control strategy's adaptability to various wind farm layouts.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Numerical Investigation of the Seismic Performance of Fully Grouted Reinforced Masonry Shear Walls with Boundary Elements Subjected to Dynamic Loading.\n \n \n \n \n\n\n \n AbdAllah, A.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n In volume 506 LNCE, pages 239 - 252, Moncton, NB, Canada, 2025. \n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20245317604862 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical Investigation of the Seismic Performance of Fully Grouted Reinforced Masonry Shear Walls with Boundary Elements Subjected to Dynamic Loading},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {AbdAllah, AbdelRahman and AbdelRahman, Belal and Galal, Khaled},\nvolume = {506 LNCE},\nyear = {2025},\npages = {239 - 252},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Reinforced masonry shear walls (RMSWs) are responsible for resisting lateral loads from seismic and wind events as well as carrying gravity loads. Adding masonry boundary elements at the end zones of RMSWs has proven to provide the required ductility and stability of reinforced masonry shear walls with boundary elements (RMSW + BEs). The prediction and quantification of the wall's seismic performance during earthquakes is crucial. This study focuses on a numerical investigation of four fully grouted RMSW + BEs subjected to dynamic loadings. Previously tested RMSW + BEs under quasi-static cyclic loading are adopted in this study. The walls have aspect ratios of 1.5 to 3.2, vertical reinforcement ratios of 0.56 and 0.68%, and horizontal reinforcement ratios of 0.3 and 0.6%. A 2D numerical model was developed using the Extreme Loading for Structures (ELS) software to simulate the nonlinear seismic behavior of the RMSW + BEs. The numerical model was validated against the experimental results of the studied walls. Subsequently, the walls were subjected to incremental dynamic loading using a set of selected and scaled Eastern Canada simulated earthquake records from the Atkinson database. The seismic performance characteristics of the walls, such as the initial stiffness, stiffness degradation, idealized yield displacement, and ductility- and overstrength-related force modification factors, were quantified for both static and dynamic loadings of the walls. The results showed a variation between the results of both loading scenarios for the initial, effective, and ultimate stiffnesses, ductility- and overstrength-related force modification factors. Moreover, the wall lateral stiffness, strength, and energy dissipation were higher due to the dynamic loading than the quasi-static cyclic loading. This study highlights the variation of the dynamic response of RMSW + BEs compared to their counterparts when tested under quasi-static cyclic loading.<br/></div> © Canadian Society for Civil Engineering 2025.},\nkey = {Aspect ratio},\n%keywords = {Cyclic loads;Earthquake effects;Earthquake engineering;Reinforced concrete;Retaining walls;Seismic response;Shear stress;Shear walls;},\n%note = {Boundary elements;Concrete masonry;Incremental dynamic analysis;Masonry shear walls;Quasi-static loading;Reinforced masonry;Response modification factors;Seismic Performance;Seismic response modification;Seismic response modification factor;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61535-1_20},\n} \n\n\n
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Reinforced masonry shear walls (RMSWs) are responsible for resisting lateral loads from seismic and wind events as well as carrying gravity loads. Adding masonry boundary elements at the end zones of RMSWs has proven to provide the required ductility and stability of reinforced masonry shear walls with boundary elements (RMSW + BEs). The prediction and quantification of the wall's seismic performance during earthquakes is crucial. This study focuses on a numerical investigation of four fully grouted RMSW + BEs subjected to dynamic loadings. Previously tested RMSW + BEs under quasi-static cyclic loading are adopted in this study. The walls have aspect ratios of 1.5 to 3.2, vertical reinforcement ratios of 0.56 and 0.68%, and horizontal reinforcement ratios of 0.3 and 0.6%. A 2D numerical model was developed using the Extreme Loading for Structures (ELS) software to simulate the nonlinear seismic behavior of the RMSW + BEs. The numerical model was validated against the experimental results of the studied walls. Subsequently, the walls were subjected to incremental dynamic loading using a set of selected and scaled Eastern Canada simulated earthquake records from the Atkinson database. The seismic performance characteristics of the walls, such as the initial stiffness, stiffness degradation, idealized yield displacement, and ductility- and overstrength-related force modification factors, were quantified for both static and dynamic loadings of the walls. The results showed a variation between the results of both loading scenarios for the initial, effective, and ultimate stiffnesses, ductility- and overstrength-related force modification factors. Moreover, the wall lateral stiffness, strength, and energy dissipation were higher due to the dynamic loading than the quasi-static cyclic loading. This study highlights the variation of the dynamic response of RMSW + BEs compared to their counterparts when tested under quasi-static cyclic loading.
© Canadian Society for Civil Engineering 2025.\n
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\n \n\n \n \n \n \n \n \n Experimental Investigation of the Mechanical Properties of Stretcher and C-shaped Masonry Prisms Under Axial Compression Loading.\n \n \n \n \n\n\n \n Al-Ahdal, A.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n In volume 506 LNCE, pages 13 - 24, Moncton, NB, Canada, 2025. \n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20245317604844 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental Investigation of the Mechanical Properties of Stretcher and C-shaped Masonry Prisms Under Axial Compression Loading},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Al-Ahdal, Abdulelah and AbdelRahman, Belal and Galal, Khaled},\nvolume = {506 LNCE},\nyear = {2025},\npages = {13 - 24},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Masonry structures behave in a heterogeneous manner since they consist of different materials (i.e., blocks, mortar, grout, and reinforcement) with different mechanical properties. This makes their behavior more arbitrary, complicated, and challenging to predict due to the presence of various components. Although there is a considerable number of experimental investigations for masonry prisms in the literature, these investigations mainly focused on the ultimate capacity and corresponding strain, whereas complete data, including the post-peak behavior, is minimal. The interpretation of the complete compressive stress–strain curve of fully grouted and ungrouted web and boundary element assemblages is essential to understand the response of reinforced masonry shear walls (RMSWs) as structural elements subjected to lateral forces. Therefore, this study presents an experimental investigation of the mechanical properties of masonry assemblages under axial compression loading. Twenty-eight masonry prisms were constructed and tested to investigate the axial compressive response of fully grouted, ungrouted, and boundary element masonry assemblages according to CSA S304-14. Additionally, 100 × 200 mm cylinders of grout and 50 mm mortar cube specimens, sampled during the construction of the prisms, were tested according to CSA A179-14 and ASTM C109M-13, respectively. The results provide complete compressive stress–strain curves for grouted, ungrouted, and C-shaped boundary element prisms. The results showed that the ungrouted prisms have higher peak compressive stress than their grouted counterparts. Moreover, the boundary element prisms demonstrated relatively higher compressive strength than fully grouted web prisms.<br/></div> © Canadian Society for Civil Engineering 2025.},\nkey = {Mortar},\n%keywords = {Axial compression;Compressive strength;Cylinders (shapes);Grouting;Stress-strain curves;},\n%note = {Boundary elements;C-shaped;Compression loading;Compressive assemblage;Experimental investigations;Fully grouted;Masonry prisms;Mechanical;Property;Ungrouted;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61535-1_2},\n} \n\n\n
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Masonry structures behave in a heterogeneous manner since they consist of different materials (i.e., blocks, mortar, grout, and reinforcement) with different mechanical properties. This makes their behavior more arbitrary, complicated, and challenging to predict due to the presence of various components. Although there is a considerable number of experimental investigations for masonry prisms in the literature, these investigations mainly focused on the ultimate capacity and corresponding strain, whereas complete data, including the post-peak behavior, is minimal. The interpretation of the complete compressive stress–strain curve of fully grouted and ungrouted web and boundary element assemblages is essential to understand the response of reinforced masonry shear walls (RMSWs) as structural elements subjected to lateral forces. Therefore, this study presents an experimental investigation of the mechanical properties of masonry assemblages under axial compression loading. Twenty-eight masonry prisms were constructed and tested to investigate the axial compressive response of fully grouted, ungrouted, and boundary element masonry assemblages according to CSA S304-14. Additionally, 100 × 200 mm cylinders of grout and 50 mm mortar cube specimens, sampled during the construction of the prisms, were tested according to CSA A179-14 and ASTM C109M-13, respectively. The results provide complete compressive stress–strain curves for grouted, ungrouted, and C-shaped boundary element prisms. The results showed that the ungrouted prisms have higher peak compressive stress than their grouted counterparts. Moreover, the boundary element prisms demonstrated relatively higher compressive strength than fully grouted web prisms.
© Canadian Society for Civil Engineering 2025.\n
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\n \n\n \n \n \n \n \n \n Experimental Investigation on the Local Stability of Thin-Walled Aluminium Extrusions of Different Shapes.\n \n \n \n \n\n\n \n Dahboul, S.; Li, L.; Verma, P.; Dey, P.; and Boissonnade, N.\n\n\n \n\n\n\n In volume 506 LNCE, pages 205 - 216, Moncton, NB, Canada, 2025. \n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20245317604859 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental Investigation on the Local Stability of Thin-Walled Aluminium Extrusions of Different Shapes},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Dahboul, Sahar and Li, Liya and Verma, Prachi and Dey, Pampa and Boissonnade, Nicolas},\nvolume = {506 LNCE},\nyear = {2025},\npages = {205 - 216},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study aims at providing such pivotal knowledge necessary to better understand the behaviour of aluminium members through experimental investigations. With this objective, a comprehensive experimental study was performed to analyze the buckling behaviour of extruded aluminium members under compression with different section shapes, such as rectangular, square, I-shapes, and complex shapes. Overall, 14 stub column tests were performed and 24 cross-sectional tests under axial and eccentric compression are currently being conducted to investigate the local buckling behaviour of aluminium sections. In addition, 14 tensile coupon tests were carried out to further characterize the material response, and with also the intention of further using this data in accurate FE models. Also, initial geometrical imperfections in each specimen were measured mechanically as well as using 3D scanners. In order to investigate the buckling behaviour of aluminium members beyond experiments, the development of advanced non-linear shell numerical models is under way; the latter shall be validated through the measurements and results of the experimental study. Eventually, the results of the experimental and numerical studies shall enable developing a novel design approach for the prediction of the resistance of aluminium members, by means of the "Overall Interaction Concept".<br/></div> © Canadian Society for Civil Engineering 2025.},\nkey = {Local buckling},\n%keywords = {Aluminum alloys;Buckling;Buckling behavior;Buckling loads;Buckling modes;Tensile testing;Thin walled structures;},\n%note = {Aluminium extrusions;Buckling behaviour;Complex shapes;Cross-sectional test;Different shapes;Experimental investigations;Extruded aluminum;Local stability;Stub column test;Thin-walled;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61535-1_17},\n} \n\n\n
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This study aims at providing such pivotal knowledge necessary to better understand the behaviour of aluminium members through experimental investigations. With this objective, a comprehensive experimental study was performed to analyze the buckling behaviour of extruded aluminium members under compression with different section shapes, such as rectangular, square, I-shapes, and complex shapes. Overall, 14 stub column tests were performed and 24 cross-sectional tests under axial and eccentric compression are currently being conducted to investigate the local buckling behaviour of aluminium sections. In addition, 14 tensile coupon tests were carried out to further characterize the material response, and with also the intention of further using this data in accurate FE models. Also, initial geometrical imperfections in each specimen were measured mechanically as well as using 3D scanners. In order to investigate the buckling behaviour of aluminium members beyond experiments, the development of advanced non-linear shell numerical models is under way; the latter shall be validated through the measurements and results of the experimental study. Eventually, the results of the experimental and numerical studies shall enable developing a novel design approach for the prediction of the resistance of aluminium members, by means of the \"Overall Interaction Concept\".
© Canadian Society for Civil Engineering 2025.\n
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\n \n\n \n \n \n \n \n \n Numerical Investigation of the Effect of the Seismic Design Provisions on the Response of Flexural-Dominated Partially Grouted Reinforced Masonry Shear Walls.\n \n \n \n \n\n\n \n Elmeligy, O.; Abdelrahman, B.; and Galal, K.\n\n\n \n\n\n\n In volume 506 LNCE, pages 383 - 395, Moncton, NB, Canada, 2025. \n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20245317604873 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical Investigation of the Effect of the Seismic Design Provisions on the Response of Flexural-Dominated Partially Grouted Reinforced Masonry Shear Walls},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Elmeligy, Omar and Abdelrahman, Belal and Galal, Khaled},\nvolume = {506 LNCE},\nyear = {2025},\npages = {383 - 395},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Partially grouted reinforced masonry shear walls (PG-RMSWs) have emerged as an efficient and economic seismic force-resisting system (SFRS) in North America. Unlike fully grouted reinforced masonry shear walls (FG-RMSWs), where all masonry cells are grouted, in the PG-RMSWs system, grout is only placed in cells with vertical reinforcement and horizontally reinforced bond beams. Despite the economic benefits of PG-RMSWs systems in low-rise buildings, the use of such a system in mid- and high-rise structures is still questionable since minimal research has been conducted to study the behavior of flexural-dominated PG-RMSWs. The literature lacks comprehensive studies investigating different limitations adopted for flexural-dominated PG-RMSWs in the North American masonry design standards (i.e., TMS 402/602-16 and CSA S304-14). These limitations have a major influence on the ductility of the walls, the energy dissipation capacity, and the damping characteristics. Most of the conducted studies targeted FG-RMSWs and were then adopted for PG-RMSWs with some modifications and conservatism that do not always reflect the actual case. Accordingly, this study investigates the effect of various design parameters on the quasi-static lateral cyclic response of flexural-dominated PG-RMSWs. Eight walls with different aspect ratios were designed to represent the CSA S304-14 and TMS 402/602-16 different seismic provisions for moderately ductile reinforced masonry shear walls (RMSWs) and intermediate RMSWs, respectively. A 2D numerical simplified micro model was developed using the Extreme Loading for Structures (ELS) software to model the studied PG-RMSWs. The results showed that PG-RMSWs that satisfy seismic provisions of the TMS 402/602-16 intermediate RMSWs don’t possess enough ductility as required. On the other hand, the CSA S304-14 code provisions for moderately ductile reinforced masonry shear walls can be extended to cover partially grouted flexural-dominated RMSWs.<br/></div> © Canadian Society for Civil Engineering 2025.},\nkey = {Aspect ratio},\n%keywords = {Mortar;Seismic design;Seismic response;Shear walls;Structural dynamics;Tall buildings;},\n%note = {CSA s304-14;Design provisions;Flexural-dominated;Masonry shear walls;Numerical investigations;Partially grouted;Reinforced masonry;Seismic load;Shear-wall systems;TMS 402/602-16;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61535-1_31},\n} \n\n\n
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Partially grouted reinforced masonry shear walls (PG-RMSWs) have emerged as an efficient and economic seismic force-resisting system (SFRS) in North America. Unlike fully grouted reinforced masonry shear walls (FG-RMSWs), where all masonry cells are grouted, in the PG-RMSWs system, grout is only placed in cells with vertical reinforcement and horizontally reinforced bond beams. Despite the economic benefits of PG-RMSWs systems in low-rise buildings, the use of such a system in mid- and high-rise structures is still questionable since minimal research has been conducted to study the behavior of flexural-dominated PG-RMSWs. The literature lacks comprehensive studies investigating different limitations adopted for flexural-dominated PG-RMSWs in the North American masonry design standards (i.e., TMS 402/602-16 and CSA S304-14). These limitations have a major influence on the ductility of the walls, the energy dissipation capacity, and the damping characteristics. Most of the conducted studies targeted FG-RMSWs and were then adopted for PG-RMSWs with some modifications and conservatism that do not always reflect the actual case. Accordingly, this study investigates the effect of various design parameters on the quasi-static lateral cyclic response of flexural-dominated PG-RMSWs. Eight walls with different aspect ratios were designed to represent the CSA S304-14 and TMS 402/602-16 different seismic provisions for moderately ductile reinforced masonry shear walls (RMSWs) and intermediate RMSWs, respectively. A 2D numerical simplified micro model was developed using the Extreme Loading for Structures (ELS) software to model the studied PG-RMSWs. The results showed that PG-RMSWs that satisfy seismic provisions of the TMS 402/602-16 intermediate RMSWs don’t possess enough ductility as required. On the other hand, the CSA S304-14 code provisions for moderately ductile reinforced masonry shear walls can be extended to cover partially grouted flexural-dominated RMSWs.
© Canadian Society for Civil Engineering 2025.\n
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\n \n\n \n \n \n \n \n \n An Experimental Study on the Local Instability of Aluminum Circular Hollow Sections.\n \n \n \n \n\n\n \n Li, L.; Dahboul, S.; Verma, P.; Dey, P.; Fafard, M.; and Boissonnade, N.\n\n\n \n\n\n\n In volume 506 LNCE, pages 295 - 305, Moncton, NB, Canada, 2025. \n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20245317604866 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An Experimental Study on the Local Instability of Aluminum Circular Hollow Sections},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Li, Liya and Dahboul, Sahar and Verma, Prachi and Dey, Pampa and Fafard, Mario and Boissonnade, Nicolas},\nvolume = {506 LNCE},\nyear = {2025},\npages = {295 - 305},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Aluminum possesses numerous advantages as a construction material such as a high strength-to-weight ratio, excellent durability, corrosion resistance, recyclability, and formability. Nevertheless, due to the limited knowledge of their buckling behavior and efficient design recommendations, aluminum alloys are yet to be accepted widely in structural applications. To enable a more efficient design for aluminum structural members, this study aims at analyzing the buckling behavior of aluminum extrusions through experimental studies. With the specific objective to investigate the local buckling instability of aluminum extrusions, four series of stub column tests with axial compression and ten short beam-column tests with eccentric compression were performed on Circular Hollow Sections (CHS) with 6061-T6 aluminum alloy. The initial geometrical imperfections of the specimens were measured by using professional 3D scanners and the material properties were obtained through tensile coupon tests.<br/></div> © Canadian Society for Civil Engineering 2025.},\nkey = {Aluminum alloys},\n%keywords = {Aluminum corrosion;Buckling;Buckling behavior;Buckling loads;Buckling modes;Corrosion resistance;Corrosion resistant alloys;Local buckling;Metal extrusion;Tensile testing;},\n%note = {Aluminium extrusions;Aluminum circular hollow section;Buckling behaviour;Efficient designs;Experimental test;High-strength;Hollow section;Local buckling;Local instability;Strength to weight ratio;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61535-1_24},\n} \n\n\n
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Aluminum possesses numerous advantages as a construction material such as a high strength-to-weight ratio, excellent durability, corrosion resistance, recyclability, and formability. Nevertheless, due to the limited knowledge of their buckling behavior and efficient design recommendations, aluminum alloys are yet to be accepted widely in structural applications. To enable a more efficient design for aluminum structural members, this study aims at analyzing the buckling behavior of aluminum extrusions through experimental studies. With the specific objective to investigate the local buckling instability of aluminum extrusions, four series of stub column tests with axial compression and ten short beam-column tests with eccentric compression were performed on Circular Hollow Sections (CHS) with 6061-T6 aluminum alloy. The initial geometrical imperfections of the specimens were measured by using professional 3D scanners and the material properties were obtained through tensile coupon tests.
© Canadian Society for Civil Engineering 2025.\n
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\n \n\n \n \n \n \n \n \n Numerical Modelling of Fully Grouted Reinforced Concrete Masonry Shear Walls Using Finite and Applied Element Methods.\n \n \n \n \n\n\n \n Mossa, R.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n In volume 506 LNCE, pages 279 - 293, Moncton, NB, Canada, 2025. \n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20245317604865 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical Modelling of Fully Grouted Reinforced Concrete Masonry Shear Walls Using Finite and Applied Element Methods},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Mossa, Rebecca and AbdelRahman, Belal and Galal, Khaled},\nvolume = {506 LNCE},\nyear = {2025},\npages = {279 - 293},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">With the availability of numerical modelling techniques, engineers and researchers can simulate and assess structures without the costly and laborious constraints of experimental studies. The finite element method (FEM) is a well-known and widely used modelling technique to simulate structures. In contrast, the applied element method (AEM) is a more recent technique, but is very promising in simulating extreme loading events on structures, such as earthquakes. The objective of this study is to compare both modelling approaches and the validation results of each technique by modelling two fully grouted reinforced masonry shear walls (RMSWs). SeismoStruct and Extreme Loading for Structures (ELS) are the selected software to apply the FEM and AEM, respectively. The results of each model were plotted against experimental results from the literature. Each modelling technique was able to capture the lateral cyclic performance of the fully grouted RMSWs. However, the SeismoStruct model required a significantly lower runtime compared to that of the ELS models. It was found that for fully grouted RMSWs, the FEM in SeismoStruct is the preferable modelling technique. However, this conclusion does not apply to other types of masonry walls such as partially grouted RMSWs, where SeismoStruct falls short in providing modelling tools to simulate them. Contrarily, ELS provides more flexibility for modelling in terms of element and material models. Furthermore, due to the idea of continuum mechanics in the FEM, the AEM is preferable when simulating a collapse. Modelling the separation of elements is more challenging in the FEM, whereas, in the AEM, elements are easily separated and can collide with the ground.<br/></div> © Canadian Society for Civil Engineering 2025.},\nkey = {Shear walls},\n%keywords = {Digital elevation model;Earthquakes;Model structures;Reinforced concrete;Retaining walls;},\n%note = {Applied element method;Concrete masonry;Element method;Extreme loadings;Finite element method;Fully grouted;Masonry shear walls;Modelling techniques;Reinforced masonry;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61535-1_23},\n} \n\n\n
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With the availability of numerical modelling techniques, engineers and researchers can simulate and assess structures without the costly and laborious constraints of experimental studies. The finite element method (FEM) is a well-known and widely used modelling technique to simulate structures. In contrast, the applied element method (AEM) is a more recent technique, but is very promising in simulating extreme loading events on structures, such as earthquakes. The objective of this study is to compare both modelling approaches and the validation results of each technique by modelling two fully grouted reinforced masonry shear walls (RMSWs). SeismoStruct and Extreme Loading for Structures (ELS) are the selected software to apply the FEM and AEM, respectively. The results of each model were plotted against experimental results from the literature. Each modelling technique was able to capture the lateral cyclic performance of the fully grouted RMSWs. However, the SeismoStruct model required a significantly lower runtime compared to that of the ELS models. It was found that for fully grouted RMSWs, the FEM in SeismoStruct is the preferable modelling technique. However, this conclusion does not apply to other types of masonry walls such as partially grouted RMSWs, where SeismoStruct falls short in providing modelling tools to simulate them. Contrarily, ELS provides more flexibility for modelling in terms of element and material models. Furthermore, due to the idea of continuum mechanics in the FEM, the AEM is preferable when simulating a collapse. Modelling the separation of elements is more challenging in the FEM, whereas, in the AEM, elements are easily separated and can collide with the ground.
© Canadian Society for Civil Engineering 2025.\n
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\n \n\n \n \n \n \n \n \n Triple-actuator apparatus for strength experiments of cold-formed steel members in combined loadings.\n \n \n \n \n\n\n \n Pham, D. K.; Pham, C. H.; Hancock, G. J.; and Rogers, C. A.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 224. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"Triple-actuatorPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244717385252 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Triple-actuator apparatus for strength experiments of cold-formed steel members in combined loadings},\njournal = {Journal of Constructional Steel Research},\nauthor = {Pham, Duy Khanh and Pham, Cao Hung and Hancock, Gregory J. and Rogers, Colin A.},\nvolume = {224},\nyear = {2025},\nissn = {0143974X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Cold-formed steel members are likely to undergo complex combinations of loadings such as bending, shear, and compression. In the literature, numerous test rigs have been developed to test members subject to both isolated and combined actions. These apparatuses are commonly employed for testing combined two actions, such as shear-bending and bending-compression. However, as of today, there is no test rig specifically designed for more complex combined actions including compression, bending and shear. This paper introduces an innovative experimental apparatus namely a "Triple-Actuator Test Rig", recently developed at the University of Sydney, with a focus on investigating the ultimate behaviour of cold-formed steel channel sections subjected to combined actions of shear, bending and compression. The combined shear and bending is conducted by using two vertical dual actuators, and the axial compression force is applied using an additional horizontal actuator. To elucidate the mechanism of the new apparatus in capturing various combinations of actions, linear static analyses are performed under different cases of combined loadings. Furthermore, detailed information on test controls and procedures is provided. An experimental validation is also conducted to demonstrate the performance of the test rig in investigating not only pure actions but also complex combinations of actions.<br/></div> © 2024 The Authors},\nkey = {Thin walled structures},\n%keywords = {Bending (forming);Bending tests;Compression testing;},\n%note = {Bending;Cold-formed steel;Cold-formed steel members;Combined actions;Combined loading;Compression;Shear;Test rigs;Thin-walled structures;Triple-actuator test rig;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2024.109150},\n} \n\n\n
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Cold-formed steel members are likely to undergo complex combinations of loadings such as bending, shear, and compression. In the literature, numerous test rigs have been developed to test members subject to both isolated and combined actions. These apparatuses are commonly employed for testing combined two actions, such as shear-bending and bending-compression. However, as of today, there is no test rig specifically designed for more complex combined actions including compression, bending and shear. This paper introduces an innovative experimental apparatus namely a \"Triple-Actuator Test Rig\", recently developed at the University of Sydney, with a focus on investigating the ultimate behaviour of cold-formed steel channel sections subjected to combined actions of shear, bending and compression. The combined shear and bending is conducted by using two vertical dual actuators, and the axial compression force is applied using an additional horizontal actuator. To elucidate the mechanism of the new apparatus in capturing various combinations of actions, linear static analyses are performed under different cases of combined loadings. Furthermore, detailed information on test controls and procedures is provided. An experimental validation is also conducted to demonstrate the performance of the test rig in investigating not only pure actions but also complex combinations of actions.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Experimental assessment of the in-plane cyclic response of flanged partially grouted reinforced masonry shear walls failing in flexure.\n \n \n \n \n\n\n \n Elmeligy, O.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 322. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244317256809 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental assessment of the in-plane cyclic response of flanged partially grouted reinforced masonry shear walls failing in flexure},\njournal = {Engineering Structures},\nauthor = {Elmeligy, Omar and AbdelRahman, Belal and Galal, Khaled},\nvolume = {322},\nyear = {2025},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Despite the economic benefits of partially grouted reinforced masonry shear wall (PG-RMSW) systems in low-rise buildings, using such a system in mid- and high-rise buildings is still questionable. This is because the literature lacks comprehensive studies investigating different seismic design provisions adopted for PG-RMSWs failing in flexure in the North American masonry design standards (i.e., TMS 402/602–22 and CSA S304–14) to design rectangular and flanged PG-RMSWs. Most of the conducted studies targeted fully grouted reinforced masonry shear walls (FG-RMSWs). They were then adopted for PG-RMSWs with some modifications and conservatism that do not always reflect the actual case. Accordingly, this study aims to experimentally explore and quantify the influence of increasing the shear span-to-depth ratio (M/(Q×d<inf>v</inf>)) on the in-plane cyclic response of flanged PG-RMSWs made with concrete masonry units and failing in flexure. In this regard, two flanged PG-RMSWs with similar cross-section dimensions and details of reinforcement and different shear span-to-depth ratios (2.54 and 5.08) designed to fail in flexure were tested under a constant axial load, quasistatic cyclic displacement and cyclic top moment. It can be shown that increasing M/(Q×d<inf>v</inf>) for flanged PG-RMSWs can result in an overall enhanced behavior compared with those with lower M/(Q×d<inf>v</inf>). In particular, it results in the enhancement of the behavior of the tested walls in terms of propagation of damage, displacement ductility, stiffness degradation, axial compressive strain, curvature, flexural and shear contribution in displacement, and finally, energy dissipation and hysteretic damping. This shall contribute to the supporting evidence that PG-RMSWs can perform well in mid- and high-rise buildings. Furthermore, this allows for the modification of clause 16.8.5.2 in CSA S304–14 to allow partial grouting of plastic hinges of PG-RMSWs of high shear span-to-depth ratio (M/(Q×d<inf>v</inf>)).<br/></div> © 2024 The Authors},\nkey = {Tall buildings},\n%keywords = {Mortar;Reinforced concrete;Retaining walls;Seismic design;Shear stress;Shear walls;Structural analysis;Structural dynamics;},\n%note = {CSA s304–14;Cyclic response;Flanged;Flexural failure;Masonry shear walls;Partially grouted;Reinforced masonry;Seismic load;Shear span-to-depth ratios;TMS 402/602–22;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2024.119089},\n} \n\n\n
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Despite the economic benefits of partially grouted reinforced masonry shear wall (PG-RMSW) systems in low-rise buildings, using such a system in mid- and high-rise buildings is still questionable. This is because the literature lacks comprehensive studies investigating different seismic design provisions adopted for PG-RMSWs failing in flexure in the North American masonry design standards (i.e., TMS 402/602–22 and CSA S304–14) to design rectangular and flanged PG-RMSWs. Most of the conducted studies targeted fully grouted reinforced masonry shear walls (FG-RMSWs). They were then adopted for PG-RMSWs with some modifications and conservatism that do not always reflect the actual case. Accordingly, this study aims to experimentally explore and quantify the influence of increasing the shear span-to-depth ratio (M/(Q×dv)) on the in-plane cyclic response of flanged PG-RMSWs made with concrete masonry units and failing in flexure. In this regard, two flanged PG-RMSWs with similar cross-section dimensions and details of reinforcement and different shear span-to-depth ratios (2.54 and 5.08) designed to fail in flexure were tested under a constant axial load, quasistatic cyclic displacement and cyclic top moment. It can be shown that increasing M/(Q×dv) for flanged PG-RMSWs can result in an overall enhanced behavior compared with those with lower M/(Q×dv). In particular, it results in the enhancement of the behavior of the tested walls in terms of propagation of damage, displacement ductility, stiffness degradation, axial compressive strain, curvature, flexural and shear contribution in displacement, and finally, energy dissipation and hysteretic damping. This shall contribute to the supporting evidence that PG-RMSWs can perform well in mid- and high-rise buildings. Furthermore, this allows for the modification of clause 16.8.5.2 in CSA S304–14 to allow partial grouting of plastic hinges of PG-RMSWs of high shear span-to-depth ratio (M/(Q×dv)).
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n A low-cost timber cladding system for the sustainable retrofit of masonry buildings: mechanical characterization under diagonal compression.\n \n \n \n \n\n\n \n Liu, J.; El-Assaly, M.; Garcia Mendez, W.; Pulatsu, B.; Chung, D.; Tidwell, P.; and Malomo, D.\n\n\n \n\n\n\n Engineering Structures, 322. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244217208162 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A low-cost timber cladding system for the sustainable retrofit of masonry buildings: mechanical characterization under diagonal compression},\njournal = {Engineering Structures},\nauthor = {Liu, Jiadaren and El-Assaly, Moustafa and Garcia Mendez, Wendy and Pulatsu, Bora and Chung, Daniel and Tidwell, Philip and Malomo, Daniele},\nvolume = {322},\nyear = {2025},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Canada faces a severe housing crisis, coupled with an aging and underutilized building stock. This issue is exacerbated in Eastern provinces like Québec and Ontario, where old unreinforced masonry (URM) buildings are prevalent and vulnerable to natural hazards such as earthquakes, floods, and soil settlements, therefore making their rehabilitation and repurpose projects particularly challenging. To address these issues and facilitate code-compliant building reuse and conversion into housing, this study presents a low-cost and sustainable timber retrofit cladding system for improving the structural response of URM buildings typical of Eastern Canada. The proposed design, devised to accommodate an energy layer as well to improve thermal performance, is tailored to the region's cold climate, low-to-moderate seismicity, and flood/soil settlement patterns, utilizing locally available construction practices and materials. In this paper, which focuses on quantifying mechanical performance alone, full-scale experimental testing of URM walls retrofitted with the proposed timber retrofit solution was conducted under in-plane diagonal compression. The results demonstrate that our novel design effectively delays brittle diagonal shear failures and transitions to more desirable mixed shear sliding mechanisms, significantly enhancing displacement capacity and post-cracking loadbearing performance to achieve ASCE 41–23 life safety (LS) thresholds. In addition to preliminary experimental and numerical data showing the potential for increasing URM thermal performance by over five times using biogenic insulation, the adopted retrofit solution enhances the maximum ultimate displacement of as-built walls under diagonal compression by 68 times on average, and recover 75.9 % of their loadbearing capacity on average after the first relevant was observed. Numerical simulations of tested walls is also conducted based on the Distinct Element Method (DEM), showing satisfactory agreement with experimental studies. Findings support the potential for broader application of our retrofit in the rehabilitation of Canada's existing URM buildings, offering a practical solution to increase housing supply while minimizing environmental impact.<br/></div> © 2024 The Authors},\nkey = {Retrofitting},\n%keywords = {Architectural design;Biohazards;Concrete mixtures;Cost engineering;Environmental design;Environmental impact;Green buildings;Mortar;Reconstruction (structural);Settlement of structures;Soil testing;Sustainable development;Walls (structural partitions);},\n%note = {Diagonal compressions;Energy;Energy-structural;Engineered timber;Integrated solutions;Low-costs;Retrofit;Structural testing;Unreinforced masonries (URMs);Unreinforced masonry building;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2024.119099},\n} \n\n\n
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Canada faces a severe housing crisis, coupled with an aging and underutilized building stock. This issue is exacerbated in Eastern provinces like Québec and Ontario, where old unreinforced masonry (URM) buildings are prevalent and vulnerable to natural hazards such as earthquakes, floods, and soil settlements, therefore making their rehabilitation and repurpose projects particularly challenging. To address these issues and facilitate code-compliant building reuse and conversion into housing, this study presents a low-cost and sustainable timber retrofit cladding system for improving the structural response of URM buildings typical of Eastern Canada. The proposed design, devised to accommodate an energy layer as well to improve thermal performance, is tailored to the region's cold climate, low-to-moderate seismicity, and flood/soil settlement patterns, utilizing locally available construction practices and materials. In this paper, which focuses on quantifying mechanical performance alone, full-scale experimental testing of URM walls retrofitted with the proposed timber retrofit solution was conducted under in-plane diagonal compression. The results demonstrate that our novel design effectively delays brittle diagonal shear failures and transitions to more desirable mixed shear sliding mechanisms, significantly enhancing displacement capacity and post-cracking loadbearing performance to achieve ASCE 41–23 life safety (LS) thresholds. In addition to preliminary experimental and numerical data showing the potential for increasing URM thermal performance by over five times using biogenic insulation, the adopted retrofit solution enhances the maximum ultimate displacement of as-built walls under diagonal compression by 68 times on average, and recover 75.9 % of their loadbearing capacity on average after the first relevant was observed. Numerical simulations of tested walls is also conducted based on the Distinct Element Method (DEM), showing satisfactory agreement with experimental studies. Findings support the potential for broader application of our retrofit in the rehabilitation of Canada's existing URM buildings, offering a practical solution to increase housing supply while minimizing environmental impact.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Experimental investigation of the effects of different reinforcement configurations on the shear strength of reinforced concrete block masonry.\n \n \n \n \n\n\n \n Mahrous, A.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 322. 2025.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244117165252 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental investigation of the effects of different reinforcement configurations on the shear strength of reinforced concrete block masonry},\njournal = {Engineering Structures},\nauthor = {Mahrous, Amgad and AbdelRahman, Belal and Galal, Khaled},\nvolume = {322},\nyear = {2025},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Reinforced concrete block masonry walls exhibit complex behaviour under lateral loading due to their composite nature and the interaction between their constituents, including units, mortar, grout, and reinforcement. The shear strength of reinforced masonry walls depends on various factors, including the properties of each constituent material, wall geometry, boundary conditions, and the presence of reinforcement with different configurations. International masonry design standards vary significantly in how they address the parameters influencing the shear capacity of reinforced masonry shear walls. Consequently, the predicted capacities show varying levels of conservatism when compared to experimental values. Given that masonry materials and construction practices are similar in the countries being compared, these discrepancies suggest differing interpretations of the significance of each parameter and possibly different philosophies regarding the balance between conservatism and accuracy in shear design. Therefore, this study investigated the influence of different reinforcement schemes on the shear strength of reinforced concrete block masonry (RM) assemblages with running bond. Forty-one concrete block masonry assemblages were tested under diagonal tension following the ASTM E519 to examine the effect of various parameters, namely, the presence of vertical or horizontal reinforcement, the vertical and horizontal reinforcement ratios, and the spacing and combination of vertical and horizontal reinforcement within the masonry assemblages. The behaviour of the masonry assemblages was evaluated based on the maximum shear stress and the corresponding shear strain, shear modulus, toughness, and pseudo-ductility. Furthermore, the effect of the studied parameters on the stress-strain curves, failure mechanisms, and crack propagation was assessed. The obtained maximum shear stresses of the tested concrete block masonry assemblages were compared with the nominal shear capacity calculated using codified equations of different design standards. The RM assemblages showed an enhancement in the shear behaviour, ductility, and distribution of cracks, especially when combining horizontal and vertical reinforcement. The results showed that adding vertical reinforcement improved the shear capacity of reinforced masonry assemblages by 21%, with an increase in the peak shear strain by 52%. Moreover, combining the vertical and horizontal reinforcement in the reinforced concrete block masonry assemblages increases the shear capacity by 15% with an enhancement in the maximum shear strain by 23%. The CSA S304–14, TMS 402/602–22, and NZS 4230 showed an underestimation of the actual shear capacity of masonry assemblages constructed in running bond and with vertical reinforcement by 177%, 138%, and 79%, respectively. Additionally, the results revealed the need for a re-evaluation of the above mentioned code equations that estimate the shear capacity for different configurations of concrete block masonry assemblages. The analyses aimed to provide insights into the effectiveness of different reinforcement configurations in enhancing the shear resistance of RM walls. The findings of this research contribute to the development of optimized design guidelines for reinforced masonry structures, thereby enhancing their overall seismic performance and safety.<br/></div> © 2024 The Authors},\nkey = {Shear strain},\n%keywords = {Concrete blocks;Crack propagation;Dynamic response;Hydroelasticity;Mortar;Philosophical aspects;Reinforced concrete;Retaining walls;Shear strength;Shear stress;Stress-strain curves;Walls (structural partitions);},\n%note = {Concrete block masonry;Cracks propagation;Failure mechanism;Horizontal reinforcement;Masonry assemblage;Reinforced masonry;Reinforcement configuration;Shear capacity;Shears strength;Vertical reinforcement;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2024.118925},\n} \n\n\n
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Reinforced concrete block masonry walls exhibit complex behaviour under lateral loading due to their composite nature and the interaction between their constituents, including units, mortar, grout, and reinforcement. The shear strength of reinforced masonry walls depends on various factors, including the properties of each constituent material, wall geometry, boundary conditions, and the presence of reinforcement with different configurations. International masonry design standards vary significantly in how they address the parameters influencing the shear capacity of reinforced masonry shear walls. Consequently, the predicted capacities show varying levels of conservatism when compared to experimental values. Given that masonry materials and construction practices are similar in the countries being compared, these discrepancies suggest differing interpretations of the significance of each parameter and possibly different philosophies regarding the balance between conservatism and accuracy in shear design. Therefore, this study investigated the influence of different reinforcement schemes on the shear strength of reinforced concrete block masonry (RM) assemblages with running bond. Forty-one concrete block masonry assemblages were tested under diagonal tension following the ASTM E519 to examine the effect of various parameters, namely, the presence of vertical or horizontal reinforcement, the vertical and horizontal reinforcement ratios, and the spacing and combination of vertical and horizontal reinforcement within the masonry assemblages. The behaviour of the masonry assemblages was evaluated based on the maximum shear stress and the corresponding shear strain, shear modulus, toughness, and pseudo-ductility. Furthermore, the effect of the studied parameters on the stress-strain curves, failure mechanisms, and crack propagation was assessed. The obtained maximum shear stresses of the tested concrete block masonry assemblages were compared with the nominal shear capacity calculated using codified equations of different design standards. The RM assemblages showed an enhancement in the shear behaviour, ductility, and distribution of cracks, especially when combining horizontal and vertical reinforcement. The results showed that adding vertical reinforcement improved the shear capacity of reinforced masonry assemblages by 21%, with an increase in the peak shear strain by 52%. Moreover, combining the vertical and horizontal reinforcement in the reinforced concrete block masonry assemblages increases the shear capacity by 15% with an enhancement in the maximum shear strain by 23%. The CSA S304–14, TMS 402/602–22, and NZS 4230 showed an underestimation of the actual shear capacity of masonry assemblages constructed in running bond and with vertical reinforcement by 177%, 138%, and 79%, respectively. Additionally, the results revealed the need for a re-evaluation of the above mentioned code equations that estimate the shear capacity for different configurations of concrete block masonry assemblages. The analyses aimed to provide insights into the effectiveness of different reinforcement configurations in enhancing the shear resistance of RM walls. The findings of this research contribute to the development of optimized design guidelines for reinforced masonry structures, thereby enhancing their overall seismic performance and safety.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Seismic collapse risk assessment and fragility analysis of reinforced masonry core walls with boundary elements using the FEMA P695 methodology.\n \n \n \n \n\n\n \n Mahrous, A.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Journal of Building Engineering, 98. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244717403635 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic collapse risk assessment and fragility analysis of reinforced masonry core walls with boundary elements using the FEMA P695 methodology},\njournal = {Journal of Building Engineering},\nauthor = {Mahrous, Amgad and AbdelRahman, Belal and Galal, Khaled},\nvolume = {98},\nyear = {2024},\nissn = {23527102},\nabstract = {<div data-language="eng" data-ev-field="abstract">In the past, the primary objective of structural design codes was centred around ensuring human life safety, with a strong focus on preventing structural collapse. This approach predominantly relied on force- or strength-based criteria as the basis for design. Nevertheless, a notable shift has occurred recently, transitioning the design philosophy from 'strength' towards a 'performance'-based approach. This shift signifies a growing recognition that strength and performance are not identical. However, to adopt the performance-based seismic design approach, it is essential to develop precise models for estimating damage and potential losses associated with various seismic force-resisting systems (SFRSs). Fragility functions are widely interpreted among the most prevalent damage and loss models. They establish a crucial link between specific demand parameters and the likelihood of exceeding various damage states. Although reinforced masonry (RM) structures have recently gained popularity, the seismic design of mid-to high-rise RM structures is still challenging because it requires a reliable SFRS capable of providing the needed ductility and capacity. Therefore, the main objective of this study is to evaluate the key seismic performance parameters (i.e., system overstrength and ductility) and to perform a collapse capacity risk assessment of reinforced masonry core walls with boundary elements (RMCW + BEs) as the main SFRS in RM structures. The current study utilizes the applied element method (AEM) implemented in the Extreme Loading for Structures software (ELS) to model three RM structures with various heights (10-, 15-, and 20-story buildings). Nonlinear pseudo-static pushover analysis was performed to quantify the ductility and overstrength of the proposed RM system following the FEMA P695 guidelines. In addition, an incremental dynamic analysis (IDA) was carried out to assess the seismic collapse risk of RMCW + BEs by generating system-level-based fragility curves. The results showed that the proposed RM system provides the needed ductility, overstrength and deformation capacity for a ductile SFRS for typical mid- and high-rise RM buildings. Furthermore, the developed collapse fragility curves verified excellent seismic performance, negligible collapse probability values and high reserved collapse capacity at the maximum considered earthquake (MCE) design level. The findings of this study significantly contribute toward adopting RMCW + BEs as an effective SFRS for typical RM buildings in the next generations of North American masonry design standards.<br/></div> © 2024 The Author(s)},\nkey = {Seismic design},\n%keywords = {Concrete mixtures;Concrete products;Convergence of numerical methods;Damage detection;Mortar;Reinforced concrete;Retaining walls;Seismic response;Structural analysis;Structural dynamics;Tall buildings;Walls (structural partitions);},\n%note = {Applied element method;Boundary elements;Core wall;Element method;FEMA p695;Fragility curves;Incremental dynamic analysis;Performance based design;Reinforced masonry;Seismic collapse;Seismic Performance;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2024.111225},\n} \n\n\n
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In the past, the primary objective of structural design codes was centred around ensuring human life safety, with a strong focus on preventing structural collapse. This approach predominantly relied on force- or strength-based criteria as the basis for design. Nevertheless, a notable shift has occurred recently, transitioning the design philosophy from 'strength' towards a 'performance'-based approach. This shift signifies a growing recognition that strength and performance are not identical. However, to adopt the performance-based seismic design approach, it is essential to develop precise models for estimating damage and potential losses associated with various seismic force-resisting systems (SFRSs). Fragility functions are widely interpreted among the most prevalent damage and loss models. They establish a crucial link between specific demand parameters and the likelihood of exceeding various damage states. Although reinforced masonry (RM) structures have recently gained popularity, the seismic design of mid-to high-rise RM structures is still challenging because it requires a reliable SFRS capable of providing the needed ductility and capacity. Therefore, the main objective of this study is to evaluate the key seismic performance parameters (i.e., system overstrength and ductility) and to perform a collapse capacity risk assessment of reinforced masonry core walls with boundary elements (RMCW + BEs) as the main SFRS in RM structures. The current study utilizes the applied element method (AEM) implemented in the Extreme Loading for Structures software (ELS) to model three RM structures with various heights (10-, 15-, and 20-story buildings). Nonlinear pseudo-static pushover analysis was performed to quantify the ductility and overstrength of the proposed RM system following the FEMA P695 guidelines. In addition, an incremental dynamic analysis (IDA) was carried out to assess the seismic collapse risk of RMCW + BEs by generating system-level-based fragility curves. The results showed that the proposed RM system provides the needed ductility, overstrength and deformation capacity for a ductile SFRS for typical mid- and high-rise RM buildings. Furthermore, the developed collapse fragility curves verified excellent seismic performance, negligible collapse probability values and high reserved collapse capacity at the maximum considered earthquake (MCE) design level. The findings of this study significantly contribute toward adopting RMCW + BEs as an effective SFRS for typical RM buildings in the next generations of North American masonry design standards.
© 2024 The Author(s)\n
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\n \n\n \n \n \n \n \n \n Unveiling the potential for decarbonization of the building sector: A comparative study of technological and non-technological low-carbon strategies.\n \n \n \n \n\n\n \n Shahmohammadi, S.; Pedinotti-Castelle, M.; and Amor, B.\n\n\n \n\n\n\n Sustainable Production and Consumption, 52: 268 - 282. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"UnveilingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244617354236 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Unveiling the potential for decarbonization of the building sector: A comparative study of technological and non-technological low-carbon strategies},\njournal = {Sustainable Production and Consumption},\nauthor = {Shahmohammadi, Sogand and Pedinotti-Castelle, Marianne and Amor, Ben},\nvolume = {52},\nyear = {2024},\npages = {268 - 282},\nissn = {23525509},\nabstract = {<div data-language="eng" data-ev-field="abstract">There is an urgent need to mitigate carbon emissions in the building sector, particularly from existing buildings. The existing literature focuses predominantly on technological strategies such as low-carbon materials. This prompts the question: Can technological strategies alone drive the decarbonization of buildings, or are non-technological strategies also essential? Although recent research considers the benefits of the latter, studies assessing the potential of non-technological strategies for decarbonization of buildings are lacking because of the challenges involved in evaluating the indirect impacts and potential trade-offs associated with these strategies such as their ripple effects on mobility. This study pioneers a comparative assessment to evaluate the environmental mitigation potential of non-technological strategies (adaptation, a subset of the sharing economy, and behavioral changes) against technological strategies (low-carbon materials, retrofitting, and recycled materials) to ascertain the effectiveness of non-technological approaches. Through life cycle assessment, this study extends beyond solely evaluating the GHG reduction potential to assess the overall environmental mitigation capacity. A single-family house in Montreal was used as a reference scenario. With significant mitigation potential observed from a non-technological perspective, the results robustly reveal that the adaptation scenario surpasses all scenarios, including retrofitting, which is the primary mitigation strategy for existing buildings, by up to 50 % and 41 % at the midpoint and damage levels, respectively. Furthermore, the adaptation scenario potentially provides sufficiency by saving considerable amounts of material and energy, thereby alleviating the environmental impact of the production and use stages by up to 27 % and 15 %, respectively. This study also evaluates the combined effects of adaptation and retrofitting for existing buildings, revealing by up to 8 % greater environmental benefits at the midpoint and damage levels than in the adaptation scenario individually. These results highlight the potential of non-technological strategies that are currently overlooked in the building sector. However, their implementation requires fewer resources and less energy than technological changes. Therefore, further investigation is warranted to explore how adopting these strategies, along with technological ones, is advantageous.<br/></div> © 2024 The Authors},\nkey = {Carbon sequestration},\n%keywords = {Carbon capture and utilization;Life cycle assessment;Low emission;},\n%note = {Adaptation scenarios;Buildings sector;Carbon material;Decarbonisation;Environmental mitigation;Low carbon;Non-technological strategy;Technological strategy;Zero carbons;Zero-carbon building;},\nURL = {http://dx.doi.org/10.1016/j.spc.2024.11.001},\n} \n\n\n
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There is an urgent need to mitigate carbon emissions in the building sector, particularly from existing buildings. The existing literature focuses predominantly on technological strategies such as low-carbon materials. This prompts the question: Can technological strategies alone drive the decarbonization of buildings, or are non-technological strategies also essential? Although recent research considers the benefits of the latter, studies assessing the potential of non-technological strategies for decarbonization of buildings are lacking because of the challenges involved in evaluating the indirect impacts and potential trade-offs associated with these strategies such as their ripple effects on mobility. This study pioneers a comparative assessment to evaluate the environmental mitigation potential of non-technological strategies (adaptation, a subset of the sharing economy, and behavioral changes) against technological strategies (low-carbon materials, retrofitting, and recycled materials) to ascertain the effectiveness of non-technological approaches. Through life cycle assessment, this study extends beyond solely evaluating the GHG reduction potential to assess the overall environmental mitigation capacity. A single-family house in Montreal was used as a reference scenario. With significant mitigation potential observed from a non-technological perspective, the results robustly reveal that the adaptation scenario surpasses all scenarios, including retrofitting, which is the primary mitigation strategy for existing buildings, by up to 50 % and 41 % at the midpoint and damage levels, respectively. Furthermore, the adaptation scenario potentially provides sufficiency by saving considerable amounts of material and energy, thereby alleviating the environmental impact of the production and use stages by up to 27 % and 15 %, respectively. This study also evaluates the combined effects of adaptation and retrofitting for existing buildings, revealing by up to 8 % greater environmental benefits at the midpoint and damage levels than in the adaptation scenario individually. These results highlight the potential of non-technological strategies that are currently overlooked in the building sector. However, their implementation requires fewer resources and less energy than technological changes. Therefore, further investigation is warranted to explore how adopting these strategies, along with technological ones, is advantageous.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Passive infrared thermography for subsurface delamination detection in concrete infrastructure: Inference on minimum requirements.\n \n \n \n \n\n\n \n Pozzer, S.; El Refai, A.; Lopez, F.; Ibarra-Castanedo, C.; and Maldague, X.\n\n\n \n\n\n\n Computers and Structures, 305. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"PassivePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243717023478 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Passive infrared thermography for subsurface delamination detection in concrete infrastructure: Inference on minimum requirements},\njournal = {Computers and Structures},\nauthor = {Pozzer, Sandra and El Refai, Ahmed and Lopez, Fernando and Ibarra-Castanedo, Clemente and Maldague, Xavier},\nvolume = {305},\nyear = {2024},\nissn = {00457949},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper introduces a computational approach for inferring the minimum requirements for the nondestructive inspection of subsurface delamination in outdoor concrete structures using passive infrared thermography (IRT). The non-linear numerical system was solved using the Finite Element Method (FEM). Complete verification and validation of the numerical model were performed through the analysis of experimental and computational errors, as well as through the comparison of computational outputs of thermal gradients with the contrast values measured in an experiment with solar radiation and passive IRT. The results of accuracy and precision of the computational simulation approach were found to be adequate, from a practical perspective, for the intended use of the model, with the thermal gradient values having an uncertainty of 0.080 ± 0.91 °C and -0.016 ± 0.91 °C for the concrete slab and column sample, respectively. Furthermore, the developed model was used to perform a one-year analysis of the studied case, in order to determine the approximate radiative heat flux required to identify defects with different size-to-depth (S/D) ratios in various concrete components with distinct solar exposures. Finally, the relationship between the calculated radiative heat flux and thermal contrast with the respective environmental variables in place was analyzed graphically.<br/></div> © 2024 The Author(s)},\nkey = {Nondestructive examination},\n%keywords = {Concrete buildings;Concrete slabs;Solar irradiance;Thermal gradients;},\n%note = {Civil engineering structures;Computational approach;Delaminations detection;Element method;Minimum requirements;Non destructive inspection;Nondestructive tests;Passive infrared;Radiative heat fluxes;Thermal;},\nURL = {http://dx.doi.org/10.1016/j.compstruc.2024.107529},\n} \n\n\n
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This paper introduces a computational approach for inferring the minimum requirements for the nondestructive inspection of subsurface delamination in outdoor concrete structures using passive infrared thermography (IRT). The non-linear numerical system was solved using the Finite Element Method (FEM). Complete verification and validation of the numerical model were performed through the analysis of experimental and computational errors, as well as through the comparison of computational outputs of thermal gradients with the contrast values measured in an experiment with solar radiation and passive IRT. The results of accuracy and precision of the computational simulation approach were found to be adequate, from a practical perspective, for the intended use of the model, with the thermal gradient values having an uncertainty of 0.080 ± 0.91 °C and -0.016 ± 0.91 °C for the concrete slab and column sample, respectively. Furthermore, the developed model was used to perform a one-year analysis of the studied case, in order to determine the approximate radiative heat flux required to identify defects with different size-to-depth (S/D) ratios in various concrete components with distinct solar exposures. Finally, the relationship between the calculated radiative heat flux and thermal contrast with the respective environmental variables in place was analyzed graphically.
© 2024 The Author(s)\n
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\n \n\n \n \n \n \n \n \n Assessing robustness of consequential LCA: Insights from a multiregional economic model tailored to the cement industrial symbiosis.\n \n \n \n \n\n\n \n Lessard, J.; Habert, G.; Tagnit-Hamou, A.; and Amor, B.\n\n\n \n\n\n\n Journal of Industrial Ecology, 28(6): 1392 - 1408. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"AssessingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243316883631 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessing robustness of consequential LCA: Insights from a multiregional economic model tailored to the cement industrial symbiosis},\njournal = {Journal of Industrial Ecology},\nauthor = {Lessard, Jean-Martin and Habert, Guillaume and Tagnit-Hamou, Arezki and Amor, Ben},\nvolume = {28},\nnumber = {6},\nyear = {2024},\npages = {1392 - 1408},\nissn = {10881980},\nabstract = {<div data-language="eng" data-ev-field="abstract">One of the key challenges in conducting consequential life cycle assessment (LCA) is to identify and quantify what is likely to be affected by changes in market behavior—so-called marginal effects. Although the critical importance of uncertainty and sensitivity assessments in attributional LCA is recognized, they are rarely conducted in consequential studies. Thus, this paper aims to address two objectives: first, to examine the uncertainty and robustness of marginal effects in consequential LCA and second, to identify the most influential group of inputs contributing to the overall variance in climate change impact scores. To accomplish this, the study employs an enhanced consequential LCA framework that integrates a multiregional economic optimization model with consequential LCA tools. The framework is applied to assess the climate implications of a 6% increase in clinker substitution within average Eastern North American cement production by 2030, relative to 2020 levels. Through this framework, a Monte Carlo simulation is conducted to evaluate the dispersion of the results. Subsequently, a variance-based one-at-a-time sensitivity analysis is performed to rank the most influential groups of inputs affecting the robustness of result across macroeconomic, material flow, economic, transport, and consequential life cycle inventory databases. Afterward, a conceptual framework is proposed to guide practitioners in prioritizing areas for testing consequential LCA results based on region-specific information. This work aims to contribute to decision-makers' access to more reliable information to support the development of effective environmental regulatory measures.<br/></div> © 2024 by the International Society for Industrial Ecology.},\nkey = {Sensitivity analysis},\n%keywords = {Cements;Climate change;Decision making;Ecology;Economic analysis;Intelligent systems;Life cycle;Monte Carlo methods;Optimization;Uncertainty analysis;},\n%note = {Consequential life-cycle assessment;Economic models;Economic optimization;Economic optimization modeling;Industrial ecology;Industrial symbiosis;Marginal effects;Monte Carlo's simulation;Optimization models;Uncertainty assessment;},\nURL = {http://dx.doi.org/10.1111/jiec.13546},\n} \n\n\n
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One of the key challenges in conducting consequential life cycle assessment (LCA) is to identify and quantify what is likely to be affected by changes in market behavior—so-called marginal effects. Although the critical importance of uncertainty and sensitivity assessments in attributional LCA is recognized, they are rarely conducted in consequential studies. Thus, this paper aims to address two objectives: first, to examine the uncertainty and robustness of marginal effects in consequential LCA and second, to identify the most influential group of inputs contributing to the overall variance in climate change impact scores. To accomplish this, the study employs an enhanced consequential LCA framework that integrates a multiregional economic optimization model with consequential LCA tools. The framework is applied to assess the climate implications of a 6% increase in clinker substitution within average Eastern North American cement production by 2030, relative to 2020 levels. Through this framework, a Monte Carlo simulation is conducted to evaluate the dispersion of the results. Subsequently, a variance-based one-at-a-time sensitivity analysis is performed to rank the most influential groups of inputs affecting the robustness of result across macroeconomic, material flow, economic, transport, and consequential life cycle inventory databases. Afterward, a conceptual framework is proposed to guide practitioners in prioritizing areas for testing consequential LCA results based on region-specific information. This work aims to contribute to decision-makers' access to more reliable information to support the development of effective environmental regulatory measures.
© 2024 by the International Society for Industrial Ecology.\n
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\n \n\n \n \n \n \n \n \n Distinct Element macro-crack networks for expedited discontinuum seismic analysis of large-scale URM structures.\n \n \n \n \n\n\n \n Zhang, Z.; Davis, L.; and Malomo, D.\n\n\n \n\n\n\n Journal of Building Engineering, 97. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"DistinctPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244117153457 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Distinct Element macro-crack networks for expedited discontinuum seismic analysis of large-scale URM structures},\njournal = {Journal of Building Engineering},\nauthor = {Zhang, Z. and Davis, L. and Malomo, D.},\nvolume = {97},\nyear = {2024},\nissn = {23527102},\nabstract = {<div data-language="eng" data-ev-field="abstract">Discontinuum analysis is a powerful tool for the detailed seismic assessment of unreinforced masonry (URM) structures, whose widespread use is however still mostly limited to small-scale assemblies or isolated components. Despite their unique capabilities, including the explicit simulation of separation phenomena, collapses and out-of-plane (OOP) failures that are hardly replicable using traditional continuum solutions, the high computational cost entailed by micro-to-meso-scale discontinuum modelling strategies, which are the standard approaches in applied research, presently prevent their employment for building-scale problems. The few available macro-scale discontinuum models specifically conceived for URM, on the other hand, rely on complex geometrical discretization processes that require costly manual work, as well as on less efficient deformable block formulations. In this paper, a new simplified discontinuum macro-model is presented and validated against full-scale laboratory test outcomes on walls, pier-spandrel systems and building specimens, in addition to various meso-scale numerical results, under either in-plane (IP) or OOP actions, and considering quasi-static (monotonic, cyclic) or dynamic loadings. The proposed simulation technique, implemented in a robust Distinct Element Method (DEM) framework, leverages a semi-automated Equivalent Frame discretization algorithm that idealizes masonry piers, spandrels and nodes as an assembly of interlocked rigid macro-blocks connected by a network of zero-thickness interface springs. The latter are herein demonstrated to effectively replicate URM damage at the component-level through fracture energy contact laws, providing macro-scale yet representative failure patterns, as well as adequate predictions of overall strength and deformation capacities. Results obtained show a good agreement between macro- and more sophisticated meso-scale predictions, as well as with experimental outcomes, albeit dissimilarities among measured and computed force-displacement responses – similarly to other simplified strategies – were detected as vertical overburden increases. Notably, for analogous levels of accuracy, the analysis time required by our new macro-models is up to 150 times lower than its meso-counterparts. The use of the proposed simplified strategy also enabled the satisfactory simulation of the quasi-static cyclic and seismic responses of full-scale building-scale specimens, prohibitive tasks using traditional detailed DEM models, while also being up to 10 times faster than previous deformable macro-models.<br/></div> © 2024 The Authors},\nkey = {Fracture energy},\n%keywords = {Concrete mixtures;Concrete products;Cracks;Macros;Reinforced concrete;Seismic response;Walls (structural partitions);},\n%note = {Building scale;Discontinuum;Discrete;Distinct element methods;Equivalent frame;Macro-models;Macroscales;Meso scale;Unreinforced masonries (URMs);Unreinforced masonry structures;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2024.110962},\n} \n\n\n
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Discontinuum analysis is a powerful tool for the detailed seismic assessment of unreinforced masonry (URM) structures, whose widespread use is however still mostly limited to small-scale assemblies or isolated components. Despite their unique capabilities, including the explicit simulation of separation phenomena, collapses and out-of-plane (OOP) failures that are hardly replicable using traditional continuum solutions, the high computational cost entailed by micro-to-meso-scale discontinuum modelling strategies, which are the standard approaches in applied research, presently prevent their employment for building-scale problems. The few available macro-scale discontinuum models specifically conceived for URM, on the other hand, rely on complex geometrical discretization processes that require costly manual work, as well as on less efficient deformable block formulations. In this paper, a new simplified discontinuum macro-model is presented and validated against full-scale laboratory test outcomes on walls, pier-spandrel systems and building specimens, in addition to various meso-scale numerical results, under either in-plane (IP) or OOP actions, and considering quasi-static (monotonic, cyclic) or dynamic loadings. The proposed simulation technique, implemented in a robust Distinct Element Method (DEM) framework, leverages a semi-automated Equivalent Frame discretization algorithm that idealizes masonry piers, spandrels and nodes as an assembly of interlocked rigid macro-blocks connected by a network of zero-thickness interface springs. The latter are herein demonstrated to effectively replicate URM damage at the component-level through fracture energy contact laws, providing macro-scale yet representative failure patterns, as well as adequate predictions of overall strength and deformation capacities. Results obtained show a good agreement between macro- and more sophisticated meso-scale predictions, as well as with experimental outcomes, albeit dissimilarities among measured and computed force-displacement responses – similarly to other simplified strategies – were detected as vertical overburden increases. Notably, for analogous levels of accuracy, the analysis time required by our new macro-models is up to 150 times lower than its meso-counterparts. The use of the proposed simplified strategy also enabled the satisfactory simulation of the quasi-static cyclic and seismic responses of full-scale building-scale specimens, prohibitive tasks using traditional detailed DEM models, while also being up to 10 times faster than previous deformable macro-models.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Impact of upstream buildings on Wind-Driven Rain Loading: Refining Obstruction Factor in ISO semi-empirical model based on CFD.\n \n \n \n \n\n\n \n Gholamalipour, P.; Ge, H.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Building Engineering, 97. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243817046366 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact of upstream buildings on Wind-Driven Rain Loading: Refining Obstruction Factor in ISO semi-empirical model based on CFD},\njournal = {Journal of Building Engineering},\nauthor = {Gholamalipour, Payam and Ge, Hua and Stathopoulos, Ted},\nvolume = {97},\nyear = {2024},\nissn = {23527102},\nabstract = {<div data-language="eng" data-ev-field="abstract">CFD is a valuable tool for assessing Wind-Driven Rain (WDR) loading, one of the most important environmental loads for façade design. The majority of previous studies on this topic have primarily concentrated on simple building configurations, i.e., stand-alone buildings. Hence, prior findings may not be applicable to consider the impact of upstream buildings in urban areas, which significantly alter wind flow field, consequently, change WDR loadings on downstream building facades compared to the stand-alone building. Part A: four different steady-state RANS models (i.e., standard k−ω, realizable k−Ε, RNG k−Ε, and standard k−Ε) coupled with the Eulerian Multiphase (EM) technique (RANS-EM) are compared and implemented using OpenFOAM-7. These models are validated and verified based on wind-tunnel and field measurement data obtained from the literature for a six-story mid-rise residential building located in an urban area in Vancouver, Canada. The study considers 13 distinct rainfall events, for the test building with/without overhangs. All four RANS models are deemed suitable for modeling WDR in urban areas, while the steady-state standard k-ω RANS-EM approach without incorporating turbulent dispersion showing slightly better performance, thus utilized for the reminder of the study. Part B: a sensitivity analysis is presented on how the upstream buildings influence the WDR loading on a downstream building, de%noted as Obstruction Factor. A comparison between the CFD and ISO semi-empirical model shows significant discrepancies, potentially reaching up to factors of 5. Thus, updated Obstruction Factors are suggested to enhance the ISO model for more accurate estimation of WDR loads.<br/></div> © 2024 The Authors},\nkey = {Computational fluid dynamics},\n%keywords = {Facades;Sensitivity analysis;Turbulence;Turbulent flow;Urban growth;Wind stress;Wind tunnels;},\n%note = {Atmospheric turbulence flow modeling;Computational fluid;Computational fluid dynamic;Fluid-dynamics;ISO semi-empirical model;Obstruction factor;Semiempirical models;Turbulence flow models;Urban area configuration;Urban areas;Wind-driven rain;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2024.110717},\n} \n\n\n
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CFD is a valuable tool for assessing Wind-Driven Rain (WDR) loading, one of the most important environmental loads for façade design. The majority of previous studies on this topic have primarily concentrated on simple building configurations, i.e., stand-alone buildings. Hence, prior findings may not be applicable to consider the impact of upstream buildings in urban areas, which significantly alter wind flow field, consequently, change WDR loadings on downstream building facades compared to the stand-alone building. Part A: four different steady-state RANS models (i.e., standard k−ω, realizable k−Ε, RNG k−Ε, and standard k−Ε) coupled with the Eulerian Multiphase (EM) technique (RANS-EM) are compared and implemented using OpenFOAM-7. These models are validated and verified based on wind-tunnel and field measurement data obtained from the literature for a six-story mid-rise residential building located in an urban area in Vancouver, Canada. The study considers 13 distinct rainfall events, for the test building with/without overhangs. All four RANS models are deemed suitable for modeling WDR in urban areas, while the steady-state standard k-ω RANS-EM approach without incorporating turbulent dispersion showing slightly better performance, thus utilized for the reminder of the study. Part B: a sensitivity analysis is presented on how the upstream buildings influence the WDR loading on a downstream building, de%noted as Obstruction Factor. A comparison between the CFD and ISO semi-empirical model shows significant discrepancies, potentially reaching up to factors of 5. Thus, updated Obstruction Factors are suggested to enhance the ISO model for more accurate estimation of WDR loads.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Multiresolution dynamic mode decomposition approach for wind pressure analysis and reconstruction around buildings.\n \n \n \n \n\n\n \n Snaiki, R.; and Mirfakhar, S. F.\n\n\n \n\n\n\n Computer-Aided Civil and Infrastructure Engineering, 39(22): 3375 - 3391. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"MultiresolutionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242816689129 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Multiresolution dynamic mode decomposition approach for wind pressure analysis and reconstruction around buildings},\njournal = {Computer-Aided Civil and Infrastructure Engineering},\nauthor = {Snaiki, Reda and Mirfakhar, Seyedeh Fatemeh},\nvolume = {39},\nnumber = {22},\nyear = {2024},\npages = {3375 - 3391},\nissn = {10939687},\nabstract = {<div data-language="eng" data-ev-field="abstract">Accurate wind pressure analysis on high-rise buildings is critical for wind load prediction. However, traditional methods struggle with the inherent complexity and multiscale nature of these data. Furthermore, the high cost and practical limitations of deploying extensive sensor networks restrict the data collection capabilities. This study addresses these limitations by introducing a novel framework for optimal sensor placement on high-rise buildings. The framework leverages the strengths of multiresolution dynamic mode decomposition (mrDMD) for feature extraction and incorporates a novel regularization term within an existing sensor placement algorithm under constraints. This innovative term enables the algorithm to consider real-world system constraints during sensor selection, leading to a more practical and efficient solution for wind pressure analysis. mrDMD effectively analyzes the multiscale features of wind pressure data. The extracted mrDMD modes, combined with the enhanced constrained QR decomposition technique, guide the selection of informative sensor locations. This approach minimizes the required number of sensors while ensuring accurate pressure field reconstruction and adhering to real-world placement constraints. The effectiveness of this method is validated using data from a scaled building model tested in a wind tunnel. This approach has the potential to revolutionize wind pressure analysis for high-rise buildings, paving the way for advancements in digital twins, real-time monitoring, and risk assessment of wind loads.<br/></div> © 2024 The Author(s). Computer-Aided Civil and Infrastructure Engineering published by Wiley Periodicals LLC on behalf of Editor.},\nkey = {Dynamic mode decomposition},\n%keywords = {Aerodynamic loads;Risk assessment;Sensor networks;Tall buildings;Wind stress;Wind tunnels;},\n%note = {Decomposition approach;Dynamic mode decompositions;High rise building;Inherent complexity;Load predictions;Multiresolution;Multiscale nature;Pressure analysis;Wind load;Wind pressures;},\nURL = {http://dx.doi.org/10.1111/mice.13304},\n} \n\n\n
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Accurate wind pressure analysis on high-rise buildings is critical for wind load prediction. However, traditional methods struggle with the inherent complexity and multiscale nature of these data. Furthermore, the high cost and practical limitations of deploying extensive sensor networks restrict the data collection capabilities. This study addresses these limitations by introducing a novel framework for optimal sensor placement on high-rise buildings. The framework leverages the strengths of multiresolution dynamic mode decomposition (mrDMD) for feature extraction and incorporates a novel regularization term within an existing sensor placement algorithm under constraints. This innovative term enables the algorithm to consider real-world system constraints during sensor selection, leading to a more practical and efficient solution for wind pressure analysis. mrDMD effectively analyzes the multiscale features of wind pressure data. The extracted mrDMD modes, combined with the enhanced constrained QR decomposition technique, guide the selection of informative sensor locations. This approach minimizes the required number of sensors while ensuring accurate pressure field reconstruction and adhering to real-world placement constraints. The effectiveness of this method is validated using data from a scaled building model tested in a wind tunnel. This approach has the potential to revolutionize wind pressure analysis for high-rise buildings, paving the way for advancements in digital twins, real-time monitoring, and risk assessment of wind loads.
© 2024 The Author(s). Computer-Aided Civil and Infrastructure Engineering published by Wiley Periodicals LLC on behalf of Editor.\n
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\n \n\n \n \n \n \n \n \n Strain distribution and failure modes of steel lattice tower gusset plates as a function of their geometry.\n \n \n \n \n\n\n \n Ahmat, A. M. A.; Langlois, S.; and Labossiere, P.\n\n\n \n\n\n\n Structures, 69. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"StrainPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244317241410 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Strain distribution and failure modes of steel lattice tower gusset plates as a function of their geometry},\njournal = {Structures},\nauthor = {Ahmat, Adam Mahamat Ali and Langlois, Sebastien and Labossiere, Pierre},\nvolume = {69},\nyear = {2024},\nissn = {23520124},\nabstract = {<div data-language="eng" data-ev-field="abstract">Steel gusset plates (SGP) are structural elements that connect and transfer loads among various members, such as beams, columns, and trusses, in steel structures like buildings, bridges, and lattice towers. Their geometry significantly affects structural performance, requiring a thorough analysis of strain distribution and failure modes to ensure the integrity and safety of structural systems. However, the design and evaluation of lattice tower gusset plates (LTGP) in particular, present challenges due to complex geometries and the lack of universally accepted design methods. This paper presents a comprehensive comparative study of the strain distribution and failure modes of LTGP across different geometries. Experimental tests were conducted using Digital Image Correlation (DIC) on specimens with different configurations, each featuring a single row of bolts. The force–displacement curves and strain distributions were analyzed to determine the influence of gusset plate width, end-distance, and the number of bolts on their behavior. The study compares the experimental data with the prescriptions of design standards. Additionally, it presents numerical modeling of LTGP connections using finite element analysis in ANSYS®, with validation against experimental results confirming model accuracy. The research program is further complemented by a parametric study examining the effects of end-distance, plate width, and bolt spacing on the ultimate strength of LTGP.<br/></div> © 2024 Institution of Structural Engineers},\nkey = {Trusses},\n%keywords = {Columns (structural);Crystal lattices;Fracture mechanics;Plates (structural components);Pressure vessels;Steel bridges;Steel structures;Structural analysis;Towers;},\n%note = {Design standard;Experimental test;Gusset plates;Lattice towers;Plate width;Steel gussets;Steel lattice;Steel lattice tower;Strain distributions;Structural elements;},\nURL = {http://dx.doi.org/10.1016/j.istruc.2024.107510},\n} \n\n\n
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Steel gusset plates (SGP) are structural elements that connect and transfer loads among various members, such as beams, columns, and trusses, in steel structures like buildings, bridges, and lattice towers. Their geometry significantly affects structural performance, requiring a thorough analysis of strain distribution and failure modes to ensure the integrity and safety of structural systems. However, the design and evaluation of lattice tower gusset plates (LTGP) in particular, present challenges due to complex geometries and the lack of universally accepted design methods. This paper presents a comprehensive comparative study of the strain distribution and failure modes of LTGP across different geometries. Experimental tests were conducted using Digital Image Correlation (DIC) on specimens with different configurations, each featuring a single row of bolts. The force–displacement curves and strain distributions were analyzed to determine the influence of gusset plate width, end-distance, and the number of bolts on their behavior. The study compares the experimental data with the prescriptions of design standards. Additionally, it presents numerical modeling of LTGP connections using finite element analysis in ANSYS®, with validation against experimental results confirming model accuracy. The research program is further complemented by a parametric study examining the effects of end-distance, plate width, and bolt spacing on the ultimate strength of LTGP.
© 2024 Institution of Structural Engineers\n
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\n \n\n \n \n \n \n \n \n Optimal replicator dynamic controller for semi active control of long span cable stayed bridge with considering special variability of seismic excitations.\n \n \n \n \n\n\n \n Momeni, Z.; and Bagchi, A.\n\n\n \n\n\n\n Structures, 69. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"OptimalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244217219615 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Optimal replicator dynamic controller for semi active control of long span cable stayed bridge with considering special variability of seismic excitations},\njournal = {Structures},\nauthor = {Momeni, Z. and Bagchi, A.},\nvolume = {69},\nyear = {2024},\nissn = {23520124},\nabstract = {<div data-language="eng" data-ev-field="abstract">Cable-stayed bridges are lifeline infrastructures. However, due to their design and structural characteristics, they are sensitive to the vibrations. Thus, vibration control in these structures is essential. Semi-active control systems have gained significant attention due to their high performance and adaptability. However, the implementation of these systems has always faced serious challenges particularly when it comes to developing appropriate control algorithms because semi active devices have complex and non-linear characteristics. Inspired by evolutionary game theory, the author utilizes the replicator dynamic controller concept to optimize the performance of MR dampers to improve the vibration reduction of cable-stayed bridges. Two key parameters in the proposed control methodologies using replicator dynamics are the total population (total available resources or the sum of actuator forces) and the growth rate. Instead of using the sensitivity analysis that has been done in previous studies for vibration reduction of highway bridges using a replicator controller, the author used an evolutionary algorithm named the nondominated sorting genetic algorithm (NSGA-II) to create an optimal replicator dynamic controller for more effective vibration reduction. The proposed methodology is evaluated through its numerical application to a second-generation benchmark example based on the Bill Emerson Memorial Bridge, which considers a more realistic behavior of the cable-stayed bridge by accounting for multiple support excitations. The study indicates that the optimal replicator dynamic controller improves the vibration reduction performance of MR dampers. Specifically, deck displacement is reduced by 46 % compared to passive control system and shear forces at the tower base are reduced by 33 % compared to active control systems for the El Centro earthquake. The results indicate that the proposed Replicator Dynamic Controller optimized through NSGA-II provides a robust and effective solution for improving seismic resilience of cable-stayed bridges.<br/></div> © 2024},\nkey = {Sensitivity analysis},\n%keywords = {Active safety systems;Bridge approaches;Bridge cables;Bridge decks;Cable stayed bridges;Highway bridges;Invariance;Nonlinear programming;Optimal control systems;Population statistics;Robustness (control systems);Seismic design;Structural dynamics;Vibration analysis;},\n%note = {Cable-stayed bridge;Data-driven approach;Dynamic controller;Long span cable stayed bridges;MR dampers;Optimisations;Performance;Replicator dynamics;Semiactive control;Vibration reductions;},\nURL = {http://dx.doi.org/10.1016/j.istruc.2024.107448},\n} \n\n\n
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Cable-stayed bridges are lifeline infrastructures. However, due to their design and structural characteristics, they are sensitive to the vibrations. Thus, vibration control in these structures is essential. Semi-active control systems have gained significant attention due to their high performance and adaptability. However, the implementation of these systems has always faced serious challenges particularly when it comes to developing appropriate control algorithms because semi active devices have complex and non-linear characteristics. Inspired by evolutionary game theory, the author utilizes the replicator dynamic controller concept to optimize the performance of MR dampers to improve the vibration reduction of cable-stayed bridges. Two key parameters in the proposed control methodologies using replicator dynamics are the total population (total available resources or the sum of actuator forces) and the growth rate. Instead of using the sensitivity analysis that has been done in previous studies for vibration reduction of highway bridges using a replicator controller, the author used an evolutionary algorithm named the nondominated sorting genetic algorithm (NSGA-II) to create an optimal replicator dynamic controller for more effective vibration reduction. The proposed methodology is evaluated through its numerical application to a second-generation benchmark example based on the Bill Emerson Memorial Bridge, which considers a more realistic behavior of the cable-stayed bridge by accounting for multiple support excitations. The study indicates that the optimal replicator dynamic controller improves the vibration reduction performance of MR dampers. Specifically, deck displacement is reduced by 46 % compared to passive control system and shear forces at the tower base are reduced by 33 % compared to active control systems for the El Centro earthquake. The results indicate that the proposed Replicator Dynamic Controller optimized through NSGA-II provides a robust and effective solution for improving seismic resilience of cable-stayed bridges.
© 2024\n
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\n \n\n \n \n \n \n \n \n A Review on Small Modular Reactors for Energy Transition in Northern Canada: Some Geotechnical Considerations in the Context of Climate Change.\n \n \n \n \n\n\n \n Afsharipour, M.; Gheysari, A. F.; Bouaanani, N.; Boudreault, R.; and Maghoul, P.\n\n\n \n\n\n\n Geotechnical and Geological Engineering, 42(8): 6697 - 6725. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243817043472 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Review on Small Modular Reactors for Energy Transition in Northern Canada: Some Geotechnical Considerations in the Context of Climate Change},\njournal = {Geotechnical and Geological Engineering},\nauthor = {Afsharipour, Mohammadhossein and Gheysari, Ali Fatolahzadeh and Bouaanani, Najib and Boudreault, Richard and Maghoul, Pooneh},\nvolume = {42},\nnumber = {8},\nyear = {2024},\npages = {6697 - 6725},\nissn = {09603182},\nabstract = {<div data-language="eng" data-ev-field="abstract">Remote northern communities in Canada face energy challenges due to their reliance on fossil fuels. Small modular reactors (SMRs) show promise as a sustainable solution to this issue, as they can reduce greenhouse gas emissions and promote sustainable development. However, SMRs require specific structural and geotechnical design paradigms for implementation and operation in permafrost regions, which are adversely affected by climate change and permafrost degradation. This study presents the potential of SMRs for sustainable energy production in the northern context. We provide an overview of SMRs and highligh their position in Canada’s energy transition in northern regions. Additionally, we discuss the challenges associated with designing and implementing SMRs in northern regions. Our study contributes to the growing body of literature on SMRs in permafrost regions and highlights the need for further research and policy development to support their adoption.<br/></div> © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.},\nkey = {Small nuclear reactors},\n%keywords = {Climate change;Energy security;Kyoto Protocol;},\n%note = {Energy;Energy transitions;Geohazards;Northern Canada;Northern community;Northern regions;Permafrost region;Permafrost thaws;Small modular reactor;Small modular reactors;},\nURL = {http://dx.doi.org/10.1007/s10706-024-02915-0},\n} \n\n\n
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Remote northern communities in Canada face energy challenges due to their reliance on fossil fuels. Small modular reactors (SMRs) show promise as a sustainable solution to this issue, as they can reduce greenhouse gas emissions and promote sustainable development. However, SMRs require specific structural and geotechnical design paradigms for implementation and operation in permafrost regions, which are adversely affected by climate change and permafrost degradation. This study presents the potential of SMRs for sustainable energy production in the northern context. We provide an overview of SMRs and highligh their position in Canada’s energy transition in northern regions. Additionally, we discuss the challenges associated with designing and implementing SMRs in northern regions. Our study contributes to the growing body of literature on SMRs in permafrost regions and highlights the need for further research and policy development to support their adoption.
© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.\n
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\n \n\n \n \n \n \n \n \n Determination of mechanical properties of headed shear connectors in composite steel beams with precast concrete hollow core slabs: Experimental study.\n \n \n \n \n\n\n \n Panjehbashi Aghdam, P.; Parent, S.; Dinehart, D. W.; and Roy, N.\n\n\n \n\n\n\n Structures, 69. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"DeterminationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243817063154 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Determination of mechanical properties of headed shear connectors in composite steel beams with precast concrete hollow core slabs: Experimental study},\njournal = {Structures},\nauthor = {Panjehbashi Aghdam, Parinaz and Parent, Serge and Dinehart, David W. and Roy, Nathalie},\nvolume = {69},\nyear = {2024},\nissn = {23520124},\nabstract = {<div data-language="eng" data-ev-field="abstract">Precast concrete hollow core (PCHC) slabs are structural elements widely used in multistory long-span composite structures for their lightweight, cost-effectiveness, and guaranteed quality. In addition to ease of installation, PCHC slabs offer high acoustic and thermal insulation, as well as commendable fire resistance. In conventional composite beams with solid concrete slabs, the composite action is established via shear studs or other mechanical shear transfer mechanisms. Consequently, determining the shear strength and stiffness of the shear studs is necessary to quantify their composite behavior. However, few studies investigate the mechanical properties of the stud connectors in composite steel beams with PCHC slabs. This study addresses this gap by 11 full-scale push-out tests performed on specimens featuring 203- and 254-mm PCHC slabs connected to steel beam via 13- and 19-mm diameter connectors. The concrete compressive strength, slab thickness, shear stud diameter, and different shear stud layouts varied in the specimens. All specimens were tested to failure documenting the load-slip diagrams and the failure modes. Mechanical properties of the shear stud connectors were assessed based on the load-slip diagrams under monotonic and cyclic loadings. The result showed that the codified equations for estimating the shear capacity of studs in solid slabs underestimate the capacity of studs in PCHC slabs. Additionally, the shear capacity of shear stud connections was reduced about 15 % in the cyclic loading case compared to the monotonic.<br/></div> © 2024},\nkey = {Compressive strength},\n%keywords = {Brain computer interface;Composite beams and girders;Concrete beams and girders;Concrete slabs;Connectors (structural);Cyclic loads;Flame resistance;Fracture mechanics;Hydroelasticity;Shear strength;Steel beams and girders;Studs (fasteners);Studs (structural members);},\n%note = {Composite steel concrete;Cyclic loading;Degree of shear connection;Hollow-core slabs;Mechanical;Pre-cast;Precast concrete hollow core slab;Push-out tests;Shear connections;Shear studs;},\nURL = {http://dx.doi.org/10.1016/j.istruc.2024.107262},\n} \n\n\n
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Precast concrete hollow core (PCHC) slabs are structural elements widely used in multistory long-span composite structures for their lightweight, cost-effectiveness, and guaranteed quality. In addition to ease of installation, PCHC slabs offer high acoustic and thermal insulation, as well as commendable fire resistance. In conventional composite beams with solid concrete slabs, the composite action is established via shear studs or other mechanical shear transfer mechanisms. Consequently, determining the shear strength and stiffness of the shear studs is necessary to quantify their composite behavior. However, few studies investigate the mechanical properties of the stud connectors in composite steel beams with PCHC slabs. This study addresses this gap by 11 full-scale push-out tests performed on specimens featuring 203- and 254-mm PCHC slabs connected to steel beam via 13- and 19-mm diameter connectors. The concrete compressive strength, slab thickness, shear stud diameter, and different shear stud layouts varied in the specimens. All specimens were tested to failure documenting the load-slip diagrams and the failure modes. Mechanical properties of the shear stud connectors were assessed based on the load-slip diagrams under monotonic and cyclic loadings. The result showed that the codified equations for estimating the shear capacity of studs in solid slabs underestimate the capacity of studs in PCHC slabs. Additionally, the shear capacity of shear stud connections was reduced about 15 % in the cyclic loading case compared to the monotonic.
© 2024\n
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\n \n\n \n \n \n \n \n \n Seismic analysis and design of general self-centering braced frames under near-fault pulse-type ground motions.\n \n \n \n \n\n\n \n Wang, Y.; Xie, Y.; Zhou, Z.; and Xie, Q.\n\n\n \n\n\n\n Journal of Building Engineering, 96. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243416907819 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic analysis and design of general self-centering braced frames under near-fault pulse-type ground motions},\njournal = {Journal of Building Engineering},\nauthor = {Wang, Yongwei and Xie, Yazhou and Zhou, Zhen and Xie, Qin},\nvolume = {96},\nyear = {2024},\nissn = {23527102},\nabstract = {<div data-language="eng" data-ev-field="abstract">The general self-centering braces (GSCBs), with a loading stiffness larger than unloading stiffness, have been proposed recently to increase the braces' energy dissipation capability under earthquake loading. This study investigates the seismic responses of GSCB frames under near-fault pulse-type ground motions and draws recommendations for their crucial design parameters. First, the equations of motion of the multiple-story GSCB frame are established, from which the equivalent multiple degrees of freedom (MDOF) model is developed and verified against the shaking table test results. The seismic responses of GSCB frames under near-fault ground motions and their pulse-type representations are further computed and compared through the derived equivalent MDOF model. Subsequently, parametric and sensitivity studies are conducted to identify the influential parameters associated with the ground motion and the GSCB frame. These parameters provide the data inputs for training an artificial neural network (ANN)-based surrogate model that predicts the seismic demands of the frame without further engaging exhaustive numerical simulations. Finally, a system-level performance index is proposed to design the GSCB to mitigate inter-story drifts, floor accelerations, and the drift concentration effect simultaneously and substantially reduce seismic losses for both structural and non-structural components. By combining the ANN-based surrogate model with the performance index, this study recommends that the GSCB's post-yielding loading stiffness, α<inf>k,2</inf>, should be around 0.25, the unloading stiffness, α<inf>k,4</inf>, should stay near 0.4, and the energy dissipation capacity factor, β<inf>f,4</inf>, can be designed with a small value of around 0.2.<br/></div> © 2024 Elsevier Ltd},\nkey = {Seismic response},\n%keywords = {Earthquake effects;Seismic design;Structural frames;},\n%note = {Artificial neural network;Degree of freedom models;Loading stiffness ratio;Multiple degree of freedom model;Multiple degrees of freedom;Near fault ground motion;Neural-networks;Performance indices;Self centering;Self-centering brace;Stiffness ratios;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2024.110375},\n} \n\n\n
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The general self-centering braces (GSCBs), with a loading stiffness larger than unloading stiffness, have been proposed recently to increase the braces' energy dissipation capability under earthquake loading. This study investigates the seismic responses of GSCB frames under near-fault pulse-type ground motions and draws recommendations for their crucial design parameters. First, the equations of motion of the multiple-story GSCB frame are established, from which the equivalent multiple degrees of freedom (MDOF) model is developed and verified against the shaking table test results. The seismic responses of GSCB frames under near-fault ground motions and their pulse-type representations are further computed and compared through the derived equivalent MDOF model. Subsequently, parametric and sensitivity studies are conducted to identify the influential parameters associated with the ground motion and the GSCB frame. These parameters provide the data inputs for training an artificial neural network (ANN)-based surrogate model that predicts the seismic demands of the frame without further engaging exhaustive numerical simulations. Finally, a system-level performance index is proposed to design the GSCB to mitigate inter-story drifts, floor accelerations, and the drift concentration effect simultaneously and substantially reduce seismic losses for both structural and non-structural components. By combining the ANN-based surrogate model with the performance index, this study recommends that the GSCB's post-yielding loading stiffness, αk,2, should be around 0.25, the unloading stiffness, αk,4, should stay near 0.4, and the energy dissipation capacity factor, βf,4, can be designed with a small value of around 0.2.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n An entirely SPH-based FSI solver and numerical investigations on hydrodynamic characteristics of the flexible structure with an ultra-thin characteristic.\n \n \n \n \n\n\n \n Bao, T.; Hu, J.; Wang, S.; Huang, C.; Yu, Y.; and Shakibaeinia, A.\n\n\n \n\n\n\n Computer Methods in Applied Mechanics and Engineering, 431. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243216804917 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An entirely SPH-based FSI solver and numerical investigations on hydrodynamic characteristics of the flexible structure with an ultra-thin characteristic},\njournal = {Computer Methods in Applied Mechanics and Engineering},\nauthor = {Bao, Tingting and Hu, Jun and Wang, Sijie and Huang, Can and Yu, Yong and Shakibaeinia, Ahmad},\nvolume = {431},\nyear = {2024},\nissn = {00457825},\nabstract = {<div data-language="eng" data-ev-field="abstract">The fluid-flexible-structure interaction (FFSI) is characterized by the large deformation, the thin structure, and the complex turbulent flow field. Accurately simulating FFSI poses three challenges, which are the modeling of the thin structure, the capture of moving interface, and the numerical stability of multi-physics field coupling, respectively. In this study, the FFSI is simulated by the entirely smoothed particle hydrodynamics (SPH) because of its natural advantage in dealing with the moving interface within a unified framework. The shell model with single-layer particles is introduced into SPH to simulate the thin flexible structure. The truncation error caused by the single-layer boundary is modified by the normal flux approach. The k-Ε turbulence model is incorporated into SPH to improve numerical accuracy in capturing turbulent details. In addition, other techniques or models that ensure the efficiency and stability of the calculation are used in this study, including PST (particle shifting technique), δ-SPH model, and GPU (graphics processing unit). The flows around the single filament and the hydrostatic benchmark are simulated to verify the accuracy of the current SPH method for simulating FFSI. The interaction between fluid and single filament and the interaction between fluid and dual-filament system are simulated to study the interacting mechanism between fluid and flexible structures. Three important conclusions are obtained by the discussions of numerical results: the critical values of dimensionless parameters can be found to determine whether the filament vibration attenuates or tends to stabilize; the stabilization time of the filament movement can be effectively reduced as the initial orientation angle increases or the perturbation of upstream flow field increases; the movement of filament with a small mass ratio is more sensitive to the perturbation of upstream flow field.<br/></div> © 2024 Elsevier B.V.},\nkey = {Flexible structures},\n%keywords = {Computer graphics;Computer graphics equipment;Flow fields;Graphics processing unit;Hydrodynamics;Program processors;Turbulence models;Turbulent flow;},\n%note = {Fluid-flexible-structure interaction;Layer boundaries;Moving interface;Shell models;Single layer;Single-layer boundary;Smoothed particle hydrodynamic;Smoothed particle hydrodynamics;Ultra-thin structures;},\nURL = {http://dx.doi.org/10.1016/j.cma.2024.117255},\n} \n\n\n
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The fluid-flexible-structure interaction (FFSI) is characterized by the large deformation, the thin structure, and the complex turbulent flow field. Accurately simulating FFSI poses three challenges, which are the modeling of the thin structure, the capture of moving interface, and the numerical stability of multi-physics field coupling, respectively. In this study, the FFSI is simulated by the entirely smoothed particle hydrodynamics (SPH) because of its natural advantage in dealing with the moving interface within a unified framework. The shell model with single-layer particles is introduced into SPH to simulate the thin flexible structure. The truncation error caused by the single-layer boundary is modified by the normal flux approach. The k-Ε turbulence model is incorporated into SPH to improve numerical accuracy in capturing turbulent details. In addition, other techniques or models that ensure the efficiency and stability of the calculation are used in this study, including PST (particle shifting technique), δ-SPH model, and GPU (graphics processing unit). The flows around the single filament and the hydrostatic benchmark are simulated to verify the accuracy of the current SPH method for simulating FFSI. The interaction between fluid and single filament and the interaction between fluid and dual-filament system are simulated to study the interacting mechanism between fluid and flexible structures. Three important conclusions are obtained by the discussions of numerical results: the critical values of dimensionless parameters can be found to determine whether the filament vibration attenuates or tends to stabilize; the stabilization time of the filament movement can be effectively reduced as the initial orientation angle increases or the perturbation of upstream flow field increases; the movement of filament with a small mass ratio is more sensitive to the perturbation of upstream flow field.
© 2024 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Response spectrum and modal dynamic analyses of gravity dams using ground motion accelerations modified to account for hydrodynamic effects.\n \n \n \n \n\n\n \n Kouhdasti, R.; and Bouaanani, N.\n\n\n \n\n\n\n Earthquake Spectra, 40(4): 2761 - 2804. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ResponsePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242516287132 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Response spectrum and modal dynamic analyses of gravity dams using ground motion accelerations modified to account for hydrodynamic effects},\njournal = {Earthquake Spectra},\nauthor = {Kouhdasti, Ramtin and Bouaanani, Najib},\nvolume = {40},\nnumber = {4},\nyear = {2024},\npages = {2761 - 2804},\nissn = {87552930},\nabstract = {<div data-language="eng" data-ev-field="abstract">This research proposes simplified methods for response spectrum and modal dynamic analyses of gravity dams using time-history and spectral seismic accelerations modified to directly account for hydrodynamic effects. The developed methods waive the need for specialized fluid-structure interaction software. They also lead to more accurate assessment of coupled structural flexibility and hydrodynamic effects due to each vibration mode than the static correction method commonly used in traditional simplified methods. The methodology utilizes analytical formulations of hydrodynamic pressure or simplified added masses to obtain the contributions of the selected vibration modes to the total seismic response. A hydrodynamic modification factor characterizing the amplification/de-amplification of acceleration seismic demands due to earthquake-induced hydrodynamic effects is also introduced. The application of the proposed methods is illustrated numerically through examples of two typical gravity dam-reservoir systems subjected to four earthquakes. The obtained results are in excellent agreement with the classical reference solutions. Time-history and spectral seismic acceleration demands modified by hydrodynamic effects as well as selected key response indicators, such as relative displacements and stresses within the studied gravity dams, are discussed.<br/></div> © The Author(s) 2024.},\nkey = {Earthquakes},\n%keywords = {Acceleration;Fluid structure interaction;Gravity dams;Hydrodynamics;Modal analysis;Reservoirs (water);Seismic design;Spectrum analysis;Vibration analysis;},\n%note = {Dam-reservoir systems;Design and evaluations;Dynamic modal analysis;Earthquake spectrum;Fluid-structure interaction;Ground-motion;Higher-mode effects;Hydrodynamic pressure;Response spectrum analyses (RSA);Seismic design and evaluation;Simplified method;Spectra's;},\nURL = {http://dx.doi.org/10.1177/87552930241246016},\n} \n\n\n
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This research proposes simplified methods for response spectrum and modal dynamic analyses of gravity dams using time-history and spectral seismic accelerations modified to directly account for hydrodynamic effects. The developed methods waive the need for specialized fluid-structure interaction software. They also lead to more accurate assessment of coupled structural flexibility and hydrodynamic effects due to each vibration mode than the static correction method commonly used in traditional simplified methods. The methodology utilizes analytical formulations of hydrodynamic pressure or simplified added masses to obtain the contributions of the selected vibration modes to the total seismic response. A hydrodynamic modification factor characterizing the amplification/de-amplification of acceleration seismic demands due to earthquake-induced hydrodynamic effects is also introduced. The application of the proposed methods is illustrated numerically through examples of two typical gravity dam-reservoir systems subjected to four earthquakes. The obtained results are in excellent agreement with the classical reference solutions. Time-history and spectral seismic acceleration demands modified by hydrodynamic effects as well as selected key response indicators, such as relative displacements and stresses within the studied gravity dams, are discussed.
© The Author(s) 2024.\n
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\n \n\n \n \n \n \n \n \n Fatigue life prediction of friction-stir-welded aluminum bridge decks – Experimental tests and numerical framework.\n \n \n \n \n\n\n \n Trimech, M.; Annan, C. D.; Walbridge, S.; and Maljaars, J.\n\n\n \n\n\n\n Engineering Structures, 317. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"FatiguePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243116773118 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Fatigue life prediction of friction-stir-welded aluminum bridge decks – Experimental tests and numerical framework},\njournal = {Engineering Structures},\nauthor = {Trimech, Mahmoud and Annan, Charles Darwin and Walbridge, Scott and Maljaars, Johan},\nvolume = {317},\nyear = {2024},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents the results of experimental tests and proposes a numerical framework for the prediction of the fatigue behaviour of friction stir welded (FSW) butt-lap joints of aluminium bridge deck extrusions. Fatigue test specimens made of welded real roadway bridge deck extrusions were subjected to cyclic bending under different loading conditions. The fatigue failure modes were thoroughly analyzed. A numerical framework incorporating a 2D finite element (FE) model based on the theory of critical distances (TCD) and a simplified linear elastic fracture mechanics (LEFM) model was developed to predict the fatigue failure initiation location and the fatigue life of the specimens under the test conditions. The location of the failure initiation played a key role in the choice of the numerical approach adopted in the prediction of fatigue life. For fatigue failures initiating from the base metal, the framework utilizes the TCD formulations while for failures in the weld joint, the LEFM model was applied. The proposed numerical framework showed a good agreement with the experimental data.<br/></div> © 2024 Elsevier Ltd},\nkey = {Friction stir welding},\n%keywords = {Aluminum;Aluminum bridges;Bridge decks;Butt welding;Ductile fracture;Extrusion;Fatigue testing;Forecasting;Fracture mechanics;Friction;Welds;},\n%note = {Aluminum bridge deck extrusion;Butt-lap joint;Critical distance;Experimental test;Fractures mechanics;Friction stir;Friction-stir-welding;Lap joint;Numerical predictions;Theory of critical distances;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2024.118559},\n} \n\n\n
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This paper presents the results of experimental tests and proposes a numerical framework for the prediction of the fatigue behaviour of friction stir welded (FSW) butt-lap joints of aluminium bridge deck extrusions. Fatigue test specimens made of welded real roadway bridge deck extrusions were subjected to cyclic bending under different loading conditions. The fatigue failure modes were thoroughly analyzed. A numerical framework incorporating a 2D finite element (FE) model based on the theory of critical distances (TCD) and a simplified linear elastic fracture mechanics (LEFM) model was developed to predict the fatigue failure initiation location and the fatigue life of the specimens under the test conditions. The location of the failure initiation played a key role in the choice of the numerical approach adopted in the prediction of fatigue life. For fatigue failures initiating from the base metal, the framework utilizes the TCD formulations while for failures in the weld joint, the LEFM model was applied. The proposed numerical framework showed a good agreement with the experimental data.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Canadian seismic design coefficients for coupled composite plate shear wall/concrete filled (CC-PSW/CF).\n \n \n \n \n\n\n \n Koirala, A.; Kizilarslan, E.; Bruneau, M.; and Tremblay, R.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 51(10): 1177 - 1189. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"CanadianPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244217209821 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Canadian seismic design coefficients for coupled composite plate shear wall/concrete filled (CC-PSW/CF)},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Koirala, Ashim and Kizilarslan, Emre and Bruneau, Michel and Tremblay, Robert},\nvolume = {51},\nnumber = {10},\nyear = {2024},\npages = {1177 - 1189},\nissn = {03151468},\nabstract = {<div data-language="eng" data-ev-field="abstract">Concrete-filled coupled composite plate shear walls (also known as as SpeedCore walls) are gaining acceptance for construction in seismic region throughout North America. Design provisions for this lateral load-resisting system have already been added to ASCE 7-22 and to the American Institute of Steel Construction Seismic Design Provisions. Adequacy of the seismic design parameters used for this structural purpose has been validated in the USA using the FEMA P695 methodology. An in-terest was expressed by the practicing engineering community to use these walls in Canada, which requires demonstration of satisfactory seismic performance within the Canadian context. As such, new analyses are needed using Canadian-specific sets of ground motions to confirm the adequacy of the seismic design parameters proposed for implementation of these composite walls in the National Building Code of Canada. This paper presents the results of these analyses, showing that the proposed seismic performance factors are appropriate for this structural system in Canada.<br/></div> © 2024 The Author(s).},\nkey = {Shear walls},\n%keywords = {Earthquakes;Plates (structural components);Seismic design;Steel structures;Structural analysis;Structural dynamics;},\n%note = {Composite plate shear wall;Composite plates;Concrete-filled;Coupled composite plate shear wall;FEMA p695 method-ology;Performance factors;Seismic Performance;Seismic performance factor;Subduction earthquakes;},\nURL = {http://dx.doi.org/10.1139/cjce-2023-0137},\n} \n\n\n
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Concrete-filled coupled composite plate shear walls (also known as as SpeedCore walls) are gaining acceptance for construction in seismic region throughout North America. Design provisions for this lateral load-resisting system have already been added to ASCE 7-22 and to the American Institute of Steel Construction Seismic Design Provisions. Adequacy of the seismic design parameters used for this structural purpose has been validated in the USA using the FEMA P695 methodology. An in-terest was expressed by the practicing engineering community to use these walls in Canada, which requires demonstration of satisfactory seismic performance within the Canadian context. As such, new analyses are needed using Canadian-specific sets of ground motions to confirm the adequacy of the seismic design parameters proposed for implementation of these composite walls in the National Building Code of Canada. This paper presents the results of these analyses, showing that the proposed seismic performance factors are appropriate for this structural system in Canada.
© 2024 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Full-Scale Testing of Two-Tiered Steel Buckling-Restrained Braced Frames.\n \n \n \n \n\n\n \n Bani, M.; Imanpour, A.; Tremblay, R.; and Saxey, B.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 150(10). 2024.\n \n\n\n\n
\n\n\n\n \n \n \"Full-ScalePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243116783511 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Full-Scale Testing of Two-Tiered Steel Buckling-Restrained Braced Frames},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Bani, Moad and Imanpour, Ali and Tremblay, Robert and Saxey, Brandt},\nvolume = {150},\nnumber = {10},\nyear = {2024},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">A full-scale, two-Tiered steel buckling-restrained braced frame (BRBF) was tested to evaluate experimentally the seismic behavior of steel multitiered BRBFs, namely, column stability response, column seismic demands, and tier deformations under a loading protocol representing earthquake ground motions. The test specimen consisted of diagonal braces oriented in opposing directions in the two adjacent tiers to create the most critical multitier response. The test frame was designed in accordance with the 2010 AISC Seismic Provisions as a lateral load-resisting system of a single-story building. The frame was subjected to a three-phase loading protocol consisting of lateral displacement time histories corresponding to a far-field ground motion record and a near-field ground motion record applied sequentially achieving total frame drifts in excess of 3.5%, followed by a final monotonic lateral displacement corresponding to 4.5% story drift. The test frame exhibited a stable response despite a non-uniform distribution of frame inelastic deformation between the tiers, which induced significant in-plane bending moments in the columns. Flexural bending, combined with a large axial compression force, led to partial yielding in the columns. Large deformation demands were also observed in the BRB yielding in tension and attracting the majority of frame lateral deformation. On the basis of test results, a displacement-based analysis approach was proposed to relate column in-plane bending and flexural stiffness to relative inelastic tier deformations.<br/></div> © 2024 American Society of Civil Engineers.},\nkey = {Earthquakes},\n%keywords = {Bending moments;Buckling;Steel beams and girders;Steel testing;Structural frames;},\n%note = {Braced frame;Buckling restrained braced frames;Buckling restrained braces;Column stability;Full-scale testing;Loading protocols;Multi-tiered;Multitiered braced frame;Seismic effect;Steel buckling-restrained brace;},\nURL = {http://dx.doi.org/10.1061/JSENDH.STENG-13337},\n} \n\n\n
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A full-scale, two-Tiered steel buckling-restrained braced frame (BRBF) was tested to evaluate experimentally the seismic behavior of steel multitiered BRBFs, namely, column stability response, column seismic demands, and tier deformations under a loading protocol representing earthquake ground motions. The test specimen consisted of diagonal braces oriented in opposing directions in the two adjacent tiers to create the most critical multitier response. The test frame was designed in accordance with the 2010 AISC Seismic Provisions as a lateral load-resisting system of a single-story building. The frame was subjected to a three-phase loading protocol consisting of lateral displacement time histories corresponding to a far-field ground motion record and a near-field ground motion record applied sequentially achieving total frame drifts in excess of 3.5%, followed by a final monotonic lateral displacement corresponding to 4.5% story drift. The test frame exhibited a stable response despite a non-uniform distribution of frame inelastic deformation between the tiers, which induced significant in-plane bending moments in the columns. Flexural bending, combined with a large axial compression force, led to partial yielding in the columns. Large deformation demands were also observed in the BRB yielding in tension and attracting the majority of frame lateral deformation. On the basis of test results, a displacement-based analysis approach was proposed to relate column in-plane bending and flexural stiffness to relative inelastic tier deformations.
© 2024 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Enhancing concrete defect segmentation using multimodal data and Siamese Neural Networks.\n \n \n \n \n\n\n \n Pozzer, S.; Ramos, G.; Rezazadeh Azar, E.; Osman, A.; El Refai, A.; Lopez, F.; Ibarra-Castanedo, C.; and Maldague, X.\n\n\n \n\n\n\n Automation in Construction, 166. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"EnhancingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242816678208 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Enhancing concrete defect segmentation using multimodal data and Siamese Neural Networks},\njournal = {Automation in Construction},\nauthor = {Pozzer, Sandra and Ramos, Gabriel and Rezazadeh Azar, Ehsan and Osman, Ahmad and El Refai, Ahmed and Lopez, Fernando and Ibarra-Castanedo, Clemente and Maldague, Xavier},\nvolume = {166},\nyear = {2024},\nissn = {09265805},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper proposes an approach for the reliable identification of subsurface damages in thermal images of concrete structures. The work explores how to mitigate false positives in subsurface delamination segmentation using thermal and visible images. The methodology employs a few-shot learning method, specifically the Siamese Neural Network (SNN), to assess the similarity between corresponding multimodal regions. The findings indicate that leveraging similarities between visible and thermal images reduces false positives and improves the segmentation model's precision by 3.6%, eliminating 351 false positives. These results enhance the reliability of semi-automatic models for detecting subsurface delamination using infrared thermography, benefiting infrastructure maintenance and encouraging the research and development of compact and reliable automation models that integrate civil engineering, nondestructive testing, and artificial intelligence domains.<br/></div> © 2024 The Author(s)},\nkey = {Semantics},\n%keywords = {Concretes;Damage detection;Image enhancement;Learning systems;Nondestructive examination;Semantic Segmentation;},\n%note = {Concrete;Concrete defects;False positive;Multi-modal data;Neural-networks;Non destructive inspection;Semantic segmentation;Siamese neural network;Thermal images;Visible image;},\nURL = {http://dx.doi.org/10.1016/j.autcon.2024.105594},\n} \n\n\n
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This paper proposes an approach for the reliable identification of subsurface damages in thermal images of concrete structures. The work explores how to mitigate false positives in subsurface delamination segmentation using thermal and visible images. The methodology employs a few-shot learning method, specifically the Siamese Neural Network (SNN), to assess the similarity between corresponding multimodal regions. The findings indicate that leveraging similarities between visible and thermal images reduces false positives and improves the segmentation model's precision by 3.6%, eliminating 351 false positives. These results enhance the reliability of semi-automatic models for detecting subsurface delamination using infrared thermography, benefiting infrastructure maintenance and encouraging the research and development of compact and reliable automation models that integrate civil engineering, nondestructive testing, and artificial intelligence domains.
© 2024 The Author(s)\n
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\n \n\n \n \n \n \n \n \n Innovative multi-setup modal analysis using random decrement technique: a novel approach for enhanced structural characterization.\n \n \n \n \n\n\n \n Sabamehr, A.; Amani, N.; and Bagchi, A.\n\n\n \n\n\n\n International Journal of Structural Integrity, 15(5): 902 - 930. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"InnovativePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243116787079 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Innovative multi-setup modal analysis using random decrement technique: a novel approach for enhanced structural characterization},\njournal = {International Journal of Structural Integrity},\nauthor = {Sabamehr, Ardalan and Amani, Nima and Bagchi, Ashutosh},\nvolume = {15},\nnumber = {5},\nyear = {2024},\npages = {902 - 930},\nissn = {17579864},\nabstract = {<div data-language="eng" data-ev-field="abstract">Purpose: This paper introduces a novel multi-setup merging method and assesses its performance using simulated response data from a Finite Element (FE) model of a five-storey frame and experimental data from a cantilever beam tested in a laboratory setting. Design/methodology/approach: In the research conducted at the Central Building Research Institute (CBRI) in Roorkee, India, a cantilever beam was examined in a laboratory setting. The study successfully extracted the modal properties of the multi-storey building using the merging technique. Identified frequencies and mode shapes provide valuable insights into the building's dynamic behavior, which is essential for structural analysis and assessment. The sensor layout and data merging approach allowed for the capture of relevant vibration modes despite the limited number of sensors, demonstrating the effectiveness of the methodology. Findings: The results show that reducing the number of sensors can impact the accuracy of the mode shapes. It is recommended to use a minimum of 8 sensor locations (every two floors) for the building under study to obtain reliable benchmark results for further evaluation, periodic monitoring, and damage identification. Originality/value: The results demonstrate that the developed algorithm can improve the system identification process and streamline data handling. Furthermore, the proposed method is successfully applied to analyze the modal properties of a multi-storey building.<br/></div> © 2024, Emerald Publishing Limited.},\nkey = {Cantilever beams},\n%keywords = {Damage detection;Identification (control systems);Merging;Modal analysis;Nanocantilevers;Religious buildings;},\n%note = {Modal properties;Modal testings;Mode shapes;Multi-setup merging;Multistorey buildings;Operational modal analysis;Performance;Random decrement technique;Structural characterization;System-identification;},\nURL = {http://dx.doi.org/10.1108/IJSI-03-2024-0051},\n} \n\n\n
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Purpose: This paper introduces a novel multi-setup merging method and assesses its performance using simulated response data from a Finite Element (FE) model of a five-storey frame and experimental data from a cantilever beam tested in a laboratory setting. Design/methodology/approach: In the research conducted at the Central Building Research Institute (CBRI) in Roorkee, India, a cantilever beam was examined in a laboratory setting. The study successfully extracted the modal properties of the multi-storey building using the merging technique. Identified frequencies and mode shapes provide valuable insights into the building's dynamic behavior, which is essential for structural analysis and assessment. The sensor layout and data merging approach allowed for the capture of relevant vibration modes despite the limited number of sensors, demonstrating the effectiveness of the methodology. Findings: The results show that reducing the number of sensors can impact the accuracy of the mode shapes. It is recommended to use a minimum of 8 sensor locations (every two floors) for the building under study to obtain reliable benchmark results for further evaluation, periodic monitoring, and damage identification. Originality/value: The results demonstrate that the developed algorithm can improve the system identification process and streamline data handling. Furthermore, the proposed method is successfully applied to analyze the modal properties of a multi-storey building.
© 2024, Emerald Publishing Limited.\n
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\n \n\n \n \n \n \n \n \n Multi-spring model for tubular rocking steel bridge piers subjected to earthquake loading.\n \n \n \n \n\n\n \n Hossain, F.; Rahmzadeh, A.; Tremblay, R.; and Alam, M. S.\n\n\n \n\n\n\n Engineering Structures, 315. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"Multi-springPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242516294950 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Multi-spring model for tubular rocking steel bridge piers subjected to earthquake loading},\njournal = {Engineering Structures},\nauthor = {Hossain, Faroque and Rahmzadeh, Ahmad and Tremblay, Robert and Alam, M. Shahria},\nvolume = {315},\nyear = {2024},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Recent decades have seen increased interest in using the controlled rocking concept in seismic resisting systems. Unlike conventional systems, where lateral deformation of a member is achieved through the formation of plastic hinges in critical regions, in the rocking systems this is achieved through a gap opening mechanism. Due to gravity load and/or post-tensioning forces, the rocking systems exhibit a self-centering behavior. Conducting a continuum finite element analysis to investigate the seismic response of such a system is quite expensive in terms of computational resources. On the other hand, a simplified macro model using two springs to simulate the gap opening/closing mechanism cannot accurately predict the dynamic response of the system. This study utilizes a multiple-spring model to simulate the nonlinear seismic response of circular tubular steel piers. An efficient optimization procedure based on a genetic algorithm is developed to calibrate the parameters of the springs. The results of continuum finite element analyses are compared with those obtained from the multi-spring model to verify the accuracy of the model. The proposed method is shown to be advantageous for accurately simulating the seismic response of a bridge model subjected to multi-directional ground motions, particularly the hysteretic force-displacement relationship, and dynamic response time history.<br/></div> © 2024},\nkey = {Genetic algorithms},\n%keywords = {Dynamic response;Dynamics;Earthquakes;Finite element method;Piers;Seismic response;Tubular steel structures;},\n%note = {Finite element;Finite element analyse;Gap opening;Macro-models;Rocking bridge;Rocking systems;Seismic analysis;Self centering;Self-centering pier;Spring model;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2024.118449},\n} \n\n\n
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Recent decades have seen increased interest in using the controlled rocking concept in seismic resisting systems. Unlike conventional systems, where lateral deformation of a member is achieved through the formation of plastic hinges in critical regions, in the rocking systems this is achieved through a gap opening mechanism. Due to gravity load and/or post-tensioning forces, the rocking systems exhibit a self-centering behavior. Conducting a continuum finite element analysis to investigate the seismic response of such a system is quite expensive in terms of computational resources. On the other hand, a simplified macro model using two springs to simulate the gap opening/closing mechanism cannot accurately predict the dynamic response of the system. This study utilizes a multiple-spring model to simulate the nonlinear seismic response of circular tubular steel piers. An efficient optimization procedure based on a genetic algorithm is developed to calibrate the parameters of the springs. The results of continuum finite element analyses are compared with those obtained from the multi-spring model to verify the accuracy of the model. The proposed method is shown to be advantageous for accurately simulating the seismic response of a bridge model subjected to multi-directional ground motions, particularly the hysteretic force-displacement relationship, and dynamic response time history.
© 2024\n
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\n \n\n \n \n \n \n \n \n Evaluation of a Coupled CFD and Multi-Body Motion Model for Ice-Structure Interaction Simulation.\n \n \n \n \n\n\n \n Pourshahbaz, H.; Ghobrial, T.; and Shakibaeinia, A.\n\n\n \n\n\n\n Water (Switzerland), 16(17). 2024.\n \n\n\n\n
\n\n\n\n \n \n \"EvaluationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243817057060 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evaluation of a Coupled CFD and Multi-Body Motion Model for Ice-Structure Interaction Simulation},\njournal = {Water (Switzerland)},\nauthor = {Pourshahbaz, Hanif and Ghobrial, Tadros and Shakibaeinia, Ahmad},\nvolume = {16},\nnumber = {17},\nyear = {2024},\nissn = {20734441},\nabstract = {<div data-language="eng" data-ev-field="abstract">The interaction of water flow, ice, and structures is common in fluvial ice processes, particularly around Ice Control Structures (ICSs) that are used to manage and prevent ice jam floods. To evaluate the effectiveness of ICSs, it is essential to understand the complex interaction between water flow, ice and the structure. Numerical modeling is a valuable tool that can facilitate such understanding. Until now, classical Eulerian mesh-based methods have not been evaluated for the simulation of ice interaction with ICS. In this paper we evaluate the capability, accuracy, and efficiency of a coupled Computational Fluid Dynamic (CFD) and multi-body motion numerical model, based on the mesh-based FLOW-3D V.2023 R1 software for simulation of ice-structure interactions in several benchmark cases. The model’s performance was compared with results from meshless-based models (performed by others) for the same laboratory test cases that were used as a reference for the comparison. To this end, simulation results from a range of dam break laboratory experiments were analyzed, encompassing varying numbers of floating objects with distinct characteristics, both in the presence and absence of ICS, and under different downstream water levels. The results show that the overall accuracy of the FLOW-3D model under various experimental conditions resulted in a RMSE of 0.0534 as opposed to an overall RMSE of 0.0599 for the meshless methods. Instabilities were observed in the FLOW-3D model for more complex phenomena that involve open boundaries and a larger number of blocks. Although the FLOW-3D model exhibited a similar computational time to the GPU-accelerated meshless-based models, constraints on the processors speed and the number of cores available for use by the processors could limit the computational time.<br/></div> © 2024 by the authors.},\nkey = {Computational fluid dynamics},\n%keywords = {Aerodynamics;Benchmarking;Digital elevation model;Flood control;Flow of water;},\n%note = {3d-modeling;Body motions;Computational fluid dynamics modeling;Control structure;FLOW-3D;Ice control structure;Ice-structure interaction;Motion models;Multi-body;Multi-body motion model;},\nURL = {http://dx.doi.org/10.3390/w16172454},\n} \n\n\n
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The interaction of water flow, ice, and structures is common in fluvial ice processes, particularly around Ice Control Structures (ICSs) that are used to manage and prevent ice jam floods. To evaluate the effectiveness of ICSs, it is essential to understand the complex interaction between water flow, ice and the structure. Numerical modeling is a valuable tool that can facilitate such understanding. Until now, classical Eulerian mesh-based methods have not been evaluated for the simulation of ice interaction with ICS. In this paper we evaluate the capability, accuracy, and efficiency of a coupled Computational Fluid Dynamic (CFD) and multi-body motion numerical model, based on the mesh-based FLOW-3D V.2023 R1 software for simulation of ice-structure interactions in several benchmark cases. The model’s performance was compared with results from meshless-based models (performed by others) for the same laboratory test cases that were used as a reference for the comparison. To this end, simulation results from a range of dam break laboratory experiments were analyzed, encompassing varying numbers of floating objects with distinct characteristics, both in the presence and absence of ICS, and under different downstream water levels. The results show that the overall accuracy of the FLOW-3D model under various experimental conditions resulted in a RMSE of 0.0534 as opposed to an overall RMSE of 0.0599 for the meshless methods. Instabilities were observed in the FLOW-3D model for more complex phenomena that involve open boundaries and a larger number of blocks. Although the FLOW-3D model exhibited a similar computational time to the GPU-accelerated meshless-based models, constraints on the processors speed and the number of cores available for use by the processors could limit the computational time.
© 2024 by the authors.\n
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\n \n\n \n \n \n \n \n \n Optimal Sensor Placement for Enhanced Efficiency in Structural Health Monitoring of Medium-Rise Buildings.\n \n \n \n \n\n\n \n Saeed, S.; Sajid, S. H.; and Chouinard, L.\n\n\n \n\n\n\n Sensors, 24(17). 2024.\n \n\n\n\n
\n\n\n\n \n \n \"OptimalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243817056724 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Optimal Sensor Placement for Enhanced Efficiency in Structural Health Monitoring of Medium-Rise Buildings},\njournal = {Sensors},\nauthor = {Saeed, Salman and Sajid, Sikandar H. and Chouinard, Luc},\nvolume = {24},\nnumber = {17},\nyear = {2024},\nissn = {14248220},\nabstract = {<div data-language="eng" data-ev-field="abstract">Output-only modal analysis using ambient vibration testing is ubiquitous for the monitoring of structural systems, especially for civil engineering structures such as buildings and bridges. Nonetheless, the instrumented nodes for large-scale structural systems need to cover a significant portion of the spatial volume of the test structure to obtain accurate global modal information. This requires considerable time and resources, which can be challenging in large-scale projects, such as the seismic vulnerability assessment over a large number of facilities. In many instances, a simple center-line (stairwell case) topology is generally used due to time, logistical, and economic constraints. The latter, though a fast technique, cannot provide complete modal information, especially for torsional modes. In this research, corner-line instrumented nodes layouts using only a reference and a roving sensor are proposed, which overcome this issue and can provide maximum modal information similar to that from 3D topologies for medium-rise buildings. Parametric studies are performed to identify the most appropriate locations for sensor placement at each floor of a medium-rise building. The results indicate that corner locations at each floor are optimal. The proposed procedure is validated through field experiments on two medium-rise buildings.<br/></div> © 2024 by the authors.},\nkey = {Floors},\n%keywords = {Bridges;Pressure vessels;Structural Mechanics;Tall buildings;Torsion testing;},\n%note = {Ambient Vibration Testing;Enhanced efficiency;Large-scale modal testing;Large-scales;Modal testings;Optimal sensor placement;Structural health;Structural systems;Testing of medium-rise building;Torsional modes;},\nURL = {http://dx.doi.org/10.3390/s24175687},\n} \n\n\n
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Output-only modal analysis using ambient vibration testing is ubiquitous for the monitoring of structural systems, especially for civil engineering structures such as buildings and bridges. Nonetheless, the instrumented nodes for large-scale structural systems need to cover a significant portion of the spatial volume of the test structure to obtain accurate global modal information. This requires considerable time and resources, which can be challenging in large-scale projects, such as the seismic vulnerability assessment over a large number of facilities. In many instances, a simple center-line (stairwell case) topology is generally used due to time, logistical, and economic constraints. The latter, though a fast technique, cannot provide complete modal information, especially for torsional modes. In this research, corner-line instrumented nodes layouts using only a reference and a roving sensor are proposed, which overcome this issue and can provide maximum modal information similar to that from 3D topologies for medium-rise buildings. Parametric studies are performed to identify the most appropriate locations for sensor placement at each floor of a medium-rise building. The results indicate that corner locations at each floor are optimal. The proposed procedure is validated through field experiments on two medium-rise buildings.
© 2024 by the authors.\n
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\n \n\n \n \n \n \n \n \n Experimental approach for assessing dissipated excess pore pressure-induced settlement.\n \n \n \n \n\n\n \n Bayoumi, A.; Chekired, M.; and Karray, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 61(9): 1755 - 1774. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243717012523 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental approach for assessing dissipated excess pore pressure-induced settlement},\njournal = {Canadian Geotechnical Journal},\nauthor = {Bayoumi, Aya and Chekired, Mohamed and Karray, Mourad},\nvolume = {61},\nnumber = {9},\nyear = {2024},\npages = {1755 - 1774},\nissn = {00083674},\nabstract = {<div data-language="eng" data-ev-field="abstract">Upon dynamic loading, saturated soils lose their strengths and undergo deformations resulting in volumetric-induced settlements that vary according to the excess pore pressure generation and dissipation variations. Traditionally, these settlements have been evaluated using standard charts based on one soil type and its relative density (RD). To assess these settlements, this study established a unique experimental methodology based on two laboratory testings: triaxial simple shear and piezoelectric ring actuator technique. Fifty-seven tests were performed on Ottawa F65 sand under strain-controlled cyclic and post-cyclic conditions. A chart was generated, revealing a relationship between the dissipated energy from cyclic loading and volumetric strain (Ε<inf>v</inf>), based on the shear wave velocity as a controlling factor. This study was compared with previous studies to verify the compatibility of the proposed approach. Another novelty was revealed by studying Ε<inf>v</inf> variation with the dissipated pressure. This variation is presented in a post-seismic chart in which deformations are tracked based on the initial soil state and maximum excess pore pressure generation ratio (Ru<inf>max</inf>) at the end of the loading phase. For each RD, the soil is divided between liquefied and non-liquefied states according to a specific Ru<inf>max</inf> (Ru<inf>max</inf>-<inf>trigger point</inf>). The calculation of the volume compressibility coefficient is proven to serve as a liquefaction-triggering criterion identifying the liquefied state.<br/></div> © 2024 The Author(s).},\nkey = {Pore pressure},\n%keywords = {Cyclic loads;Fracture mechanics;Piezoelectric actuators;Rock pressure;Shear stress;Soil liquefaction;Soil testing;},\n%note = {Dissipated energy;Dynamic loadings;Excess pore pressure;Experimental approaches;Pore-pressure generation;Relative density;Saturated soils;Settlement;Shear wave velocity;Volumetrics;},\nURL = {http://dx.doi.org/10.1139/cgj-2022-0063},\n} \n\n\n
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Upon dynamic loading, saturated soils lose their strengths and undergo deformations resulting in volumetric-induced settlements that vary according to the excess pore pressure generation and dissipation variations. Traditionally, these settlements have been evaluated using standard charts based on one soil type and its relative density (RD). To assess these settlements, this study established a unique experimental methodology based on two laboratory testings: triaxial simple shear and piezoelectric ring actuator technique. Fifty-seven tests were performed on Ottawa F65 sand under strain-controlled cyclic and post-cyclic conditions. A chart was generated, revealing a relationship between the dissipated energy from cyclic loading and volumetric strain (Εv), based on the shear wave velocity as a controlling factor. This study was compared with previous studies to verify the compatibility of the proposed approach. Another novelty was revealed by studying Εv variation with the dissipated pressure. This variation is presented in a post-seismic chart in which deformations are tracked based on the initial soil state and maximum excess pore pressure generation ratio (Rumax) at the end of the loading phase. For each RD, the soil is divided between liquefied and non-liquefied states according to a specific Rumax (Rumax-trigger point). The calculation of the volume compressibility coefficient is proven to serve as a liquefaction-triggering criterion identifying the liquefied state.
© 2024 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Shake table testing of a half-scale stone masonry building aggregate.\n \n \n \n \n\n\n \n Tomi, I.; Penna, A.; DeJong, M.; Butenweg, C.; Correia, A.; Candeias, P.; Senaldi, I.; Guerrini, G.; Malomo, D.; and Beyer, K.\n\n\n \n\n\n\n Bulletin of Earthquake Engineering, 22(12): 5963 - 5991. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ShakePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234715077510 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shake table testing of a half-scale stone masonry building aggregate},\njournal = {Bulletin of Earthquake Engineering},\nauthor = {Tomi, I. and Penna, A. and DeJong, M. and Butenweg, C. and Correia, A.A. and Candeias, P.X. and Senaldi, I. and Guerrini, G. and Malomo, D. and Beyer, K.},\nvolume = {22},\nnumber = {12},\nyear = {2024},\npages = {5963 - 5991},\nissn = {1570761X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Masonry aggregates have developed throughout city centres of Europe due to a centuries-long densification process that generally lacked consistent planning or engineering. Adjacent units are connected either through interlocking stones or a layer of mortar. Without interlocking stones, the connection between the units is weak, and an out of-phase response of the units can lead to separation and pounding. Modelling guidelines and code instructions are missing for modelling the interaction of such adjacent units because of scarce experimental data. Therefore, in this study an unreinforced stone masonry aggregate was tested on the bidirectional shake table with an incremental seismic protocol as a part of the SERA AIMS—Adjacent Interacting Masonry Structures project. The aggregate was constructed at half-scale with double-leaf undressed stone masonry without interlocking between the units. Floors were built with timber beams and one layer of planks, with different beam span orientation for each unit. After significant damage, one of the units was retrofitted by anchoring the timber beams to the walls to prevent out-of-plane failure and testing was continued. Significant interaction between the units was observed with specific damage mechanisms. Cracking and separation were observed at the interface in both longitudinal and transverse direction, starting at lower intensity runs and progressively increasing. Bidirectional seismic excitation affected the unit separation, with friction forces seemingly playing a role in the transverse direction. Signs of pounding at the interface were observed during higher intensity runs, together with the formation of a soft storey mechanism at the upper storey of the higher unit. The mechanism involved an out-of-plane response of the shared wall, with a horizontal crack at the height of the interaction. These findings contribute to a better understanding of the seismic behaviour of masonry aggregates.<br/></div> © The Author(s) 2023.},\nkey = {Aggregates},\n%keywords = {Friction;Masonry construction;Masonry materials;Seismology;Timber;Walls (structural partitions);},\n%note = {Dry joints;Flexible diaphragms;Historical masonry;Interlockings;Masonry aggregates;Seismic Performance;Shake table testing;Shake-table tests;Stone masonry;Timber beam;},\nURL = {http://dx.doi.org/10.1007/s10518-023-01810-y},\n} \n\n\n
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Masonry aggregates have developed throughout city centres of Europe due to a centuries-long densification process that generally lacked consistent planning or engineering. Adjacent units are connected either through interlocking stones or a layer of mortar. Without interlocking stones, the connection between the units is weak, and an out of-phase response of the units can lead to separation and pounding. Modelling guidelines and code instructions are missing for modelling the interaction of such adjacent units because of scarce experimental data. Therefore, in this study an unreinforced stone masonry aggregate was tested on the bidirectional shake table with an incremental seismic protocol as a part of the SERA AIMS—Adjacent Interacting Masonry Structures project. The aggregate was constructed at half-scale with double-leaf undressed stone masonry without interlocking between the units. Floors were built with timber beams and one layer of planks, with different beam span orientation for each unit. After significant damage, one of the units was retrofitted by anchoring the timber beams to the walls to prevent out-of-plane failure and testing was continued. Significant interaction between the units was observed with specific damage mechanisms. Cracking and separation were observed at the interface in both longitudinal and transverse direction, starting at lower intensity runs and progressively increasing. Bidirectional seismic excitation affected the unit separation, with friction forces seemingly playing a role in the transverse direction. Signs of pounding at the interface were observed during higher intensity runs, together with the formation of a soft storey mechanism at the upper storey of the higher unit. The mechanism involved an out-of-plane response of the shared wall, with a horizontal crack at the height of the interaction. These findings contribute to a better understanding of the seismic behaviour of masonry aggregates.
© The Author(s) 2023.\n
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\n \n\n \n \n \n \n \n \n Shake-table testing of a stone masonry building aggregate: overview of blind prediction study.\n \n \n \n \n\n\n \n Tomi, I.; Penna, A.; DeJong, M.; Butenweg, C.; Correia, A.; Candeias, P.; Senaldi, I.; Guerrini, G.; Malomo, D.; Wilding, B.; Pettinga, D.; Spanenburg, M.; Galanakis, N.; Oliver, S.; Parisse, F.; Marques, R.; Cattari, S.; Lourenco, P.; Galvez, F.; Dizhur, D.; Ingham, J.; Ramaglia, G.; Lignola, G.; Prota, A.; AlShawa, O.; Liberatore, D.; Sorrentino, L.; Gagliardo, R.; Godio, M.; Portioli, F.; Landolfo, R.; Solarino, F.; Bianchini, N.; Ciocci, M.; Romanazzi, A.; Aikolu, A.; DAnna, J.; Ramirez, R.; Romis, F.; Marinkovi, M.; orevi , F.; and Beyer, K.\n\n\n \n\n\n\n Bulletin of Earthquake Engineering, 22(12): 5993 - 6035. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"Shake-tablePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20231213779370 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shake-table testing of a stone masonry building aggregate: overview of blind prediction study},\njournal = {Bulletin of Earthquake Engineering},\nauthor = {Tomi, I. and Penna, A. and DeJong, M. and Butenweg, C. and Correia, A.A. and Candeias, P.X. and Senaldi, I. and Guerrini, G. and Malomo, D. and Wilding, B. and Pettinga, D. and Spanenburg, M. and Galanakis, N. and Oliver, S. and Parisse, F. and Marques, R. and Cattari, S. and Lourenco, P.B. and Galvez, F. and Dizhur, D. and Ingham, J.M. and Ramaglia, G. and Lignola, G.P. and Prota, A. and AlShawa, O. and Liberatore, D. and Sorrentino, L. and Gagliardo, R. and Godio, M. and Portioli, F. and Landolfo, R. and Solarino, F. and Bianchini, N. and Ciocci, M.P. and Romanazzi, A. and Aikolu, A. and DAnna, J. and Ramirez, R. and Romis, F. and Marinkovi, M. and orevi, F. and Beyer, K.},\nvolume = {22},\nnumber = {12},\nyear = {2024},\npages = {5993 - 6035},\nissn = {1570761X},\nabstract = {<div data-language="eng" data-ev-field="abstract">City centres of Europe are often composed of unreinforced masonry structural aggregates, whose seismic response is challenging to predict. To advance the state of the art on the seismic response of these aggregates, the Adjacent Interacting Masonry Structures (AIMS) subproject from Horizon 2020 project Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe (SERA) provides shake-table test data of a two-unit, double-leaf stone masonry aggregate subjected to two horizontal components of dynamic excitation. A blind prediction was organized with participants from academia and industry to test modelling approaches and assumptions and to learn about the extent of uncertainty in modelling for such masonry aggregates. The participants were provided with the full set of material and geometrical data, construction details and original seismic input and asked to predict prior to the test the expected seismic response in terms of damage mechanisms, base-shear forces, and roof displacements. The modelling approaches used differ significantly in the level of detail and the modelling assumptions. This paper provides an overview of the adopted modelling approaches and their subsequent predictions. It further discusses the range of assumptions made when modelling masonry walls, floors and connections, and aims at discovering how the common solutions regarding modelling masonry in general, and masonry aggregates in particular, affect the results. The results are evaluated both in terms of damage mechanisms, base shear forces, displacements and interface openings in both directions, and then compared with the experimental results. The modelling approaches featuring Discrete Element Method (DEM) led to the best predictions in terms of displacements, while a submission using rigid block limit analysis led to the best prediction in terms of damage mechanisms. Large coefficients of variation of predicted displacements and general underestimation of displacements in comparison with experimental results, except for DEM models, highlight the need for further consensus building on suitable modelling assumptions for such masonry aggregates.<br/></div> © The Author(s) 2023.},\nkey = {Finite difference method},\n%keywords = {Aggregates;Dynamics;Excited states;Forecasting;Masonry construction;Masonry materials;Roofs;Seismic response;Uncertainty analysis;Walls (structural partitions);},\n%note = {Base shear forces;Blind predictions;Damage mechanism;Historical masonry;Incremental dynamic analysis;Masonry aggregates;Model assumptions;Modeling approach;Shake-table tests;Stone masonry;},\nURL = {http://dx.doi.org/10.1007/s10518-022-01582-x},\n} \n\n\n
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City centres of Europe are often composed of unreinforced masonry structural aggregates, whose seismic response is challenging to predict. To advance the state of the art on the seismic response of these aggregates, the Adjacent Interacting Masonry Structures (AIMS) subproject from Horizon 2020 project Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe (SERA) provides shake-table test data of a two-unit, double-leaf stone masonry aggregate subjected to two horizontal components of dynamic excitation. A blind prediction was organized with participants from academia and industry to test modelling approaches and assumptions and to learn about the extent of uncertainty in modelling for such masonry aggregates. The participants were provided with the full set of material and geometrical data, construction details and original seismic input and asked to predict prior to the test the expected seismic response in terms of damage mechanisms, base-shear forces, and roof displacements. The modelling approaches used differ significantly in the level of detail and the modelling assumptions. This paper provides an overview of the adopted modelling approaches and their subsequent predictions. It further discusses the range of assumptions made when modelling masonry walls, floors and connections, and aims at discovering how the common solutions regarding modelling masonry in general, and masonry aggregates in particular, affect the results. The results are evaluated both in terms of damage mechanisms, base shear forces, displacements and interface openings in both directions, and then compared with the experimental results. The modelling approaches featuring Discrete Element Method (DEM) led to the best predictions in terms of displacements, while a submission using rigid block limit analysis led to the best prediction in terms of damage mechanisms. Large coefficients of variation of predicted displacements and general underestimation of displacements in comparison with experimental results, except for DEM models, highlight the need for further consensus building on suitable modelling assumptions for such masonry aggregates.
© The Author(s) 2023.\n
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\n \n\n \n \n \n \n \n \n M-DEM simulation of seismic pounding between adjacent masonry structures.\n \n \n \n \n\n\n \n Malomo, D.; and DeJong, M. J.\n\n\n \n\n\n\n Bulletin of Earthquake Engineering, 22(12): 6067 - 6092. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"M-DEMPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224613095984 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {M-DEM simulation of seismic pounding between adjacent masonry structures},\njournal = {Bulletin of Earthquake Engineering},\nauthor = {Malomo, Daniele and DeJong, Matthew J.},\nvolume = {22},\nnumber = {12},\nyear = {2024},\npages = {6067 - 6092},\nissn = {1570761X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Seismic damage due to pounding between adjacent buildings is often observed after significant earthquake events in old urban centers and globally recognized as a potential trigger for complete collapse. This is relevant for unreinforced masonry (URM) structures, which are particularly vulnerable to horizontal actions and seldom feature appropriate seismic detailing. Quantifying pounding damage between dynamically interacting URM buildings, however, is a challenging task, the details of which are difficult to simulate through analytical modeling alone. Numerical simulation of pounding failures, on the other hand, involves impact, separation and re-contact phenomena that often require advanced 3D micro-modeling strategies, often entailing a high computational expense that is not feasible when modeling the coupled seismic response of multiple buildings. To enable simulation of pounding damage in URM structures with relatively low computational cost, this paper investigates the use of a recently developed Macro-Distinct Element Model (M-DEM) approach. To this end, a M-DEM is herein used to simulate the shake-table biaxial pounding response of two dynamically interacting stone building prototypes, tested within the framework of the Seismic Testing of Adjacent Interacting Masonry Structures project sponsored by the Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe. Numerical results were obtained before the experimental test and then subsequently evaluated against the experimental results. The M-DEM predictions satisfactorily reproduced the measured base shear and interface opening, although they underestimated the floor displacement demand, especially in the transversal direction. Building on these encouraging outcomes, a post-test refined M-DEM model was also developed, and results are discussed alongside the lessons learned and proposed enhanced strategies to improve the quality of predictions.<br/></div> © The Author(s), under exclusive licence to Springer Nature B.V. 2022.},\nkey = {Numerical models},\n%keywords = {3D modeling;Buildings;Earthquake engineering;Earthquakes;Engineering geology;Masonry materials;Numerical methods;},\n%note = {Discrete elements method;Distinct element modeling;Macro element;Masonry structures;Modeling simulation;Pounding;Shake table;Stone masonry;Unreinforced masonries (URMs);Unreinforced masonry structures;},\nURL = {http://dx.doi.org/10.1007/s10518-022-01545-2},\n} \n\n\n
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Seismic damage due to pounding between adjacent buildings is often observed after significant earthquake events in old urban centers and globally recognized as a potential trigger for complete collapse. This is relevant for unreinforced masonry (URM) structures, which are particularly vulnerable to horizontal actions and seldom feature appropriate seismic detailing. Quantifying pounding damage between dynamically interacting URM buildings, however, is a challenging task, the details of which are difficult to simulate through analytical modeling alone. Numerical simulation of pounding failures, on the other hand, involves impact, separation and re-contact phenomena that often require advanced 3D micro-modeling strategies, often entailing a high computational expense that is not feasible when modeling the coupled seismic response of multiple buildings. To enable simulation of pounding damage in URM structures with relatively low computational cost, this paper investigates the use of a recently developed Macro-Distinct Element Model (M-DEM) approach. To this end, a M-DEM is herein used to simulate the shake-table biaxial pounding response of two dynamically interacting stone building prototypes, tested within the framework of the Seismic Testing of Adjacent Interacting Masonry Structures project sponsored by the Seismology and Earthquake Engineering Research Infrastructure Alliance for Europe. Numerical results were obtained before the experimental test and then subsequently evaluated against the experimental results. The M-DEM predictions satisfactorily reproduced the measured base shear and interface opening, although they underestimated the floor displacement demand, especially in the transversal direction. Building on these encouraging outcomes, a post-test refined M-DEM model was also developed, and results are discussed alongside the lessons learned and proposed enhanced strategies to improve the quality of predictions.
© The Author(s), under exclusive licence to Springer Nature B.V. 2022.\n
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\n \n\n \n \n \n \n \n \n A review on mathematical modeling of microbial and plant induced permafrost carbon feedback.\n \n \n \n \n\n\n \n Fasaeiyan, N.; Jung, S.; Boudreault, R.; Arenson, L. U.; and Maghoul, P.\n\n\n \n\n\n\n Science of the Total Environment, 939. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242316200407 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A review on mathematical modeling of microbial and plant induced permafrost carbon feedback},\njournal = {Science of the Total Environment},\nauthor = {Fasaeiyan, Niloofar and Jung, Sophie and Boudreault, Richard and Arenson, Lukas U. and Maghoul, Pooneh},\nvolume = {939},\nyear = {2024},\nissn = {00489697},\nabstract = {<div data-language="eng" data-ev-field="abstract">This review paper analyses the significance of microbial activity in permafrost carbon feedback (PCF) and emphasizes the necessity for enhanced modeling tools to appropriately predict carbon fluxes associated with permafrost thaw. Beginning with an overview of experimental findings, both in situ and laboratory, it stresses the key role of microbes and plants in PCF. The research investigates several modeling techniques, starting with current models of soil respiration and plant-microorganism interactions built outside of the context of permafrost, and then moving on to specific models dedicated to PCF. The review of the current literature reveals the complex nature of permafrost ecosystems, where various geophysical factors have considerable effects on greenhouse gas emissions. Soil properties, plant types, and time scales all contribute to carbon dynamics. Process-based models are widely used for simulating greenhouse gas production, transport, and emissions. While these models are beneficial at capturing soil respiration complexity, adjusting them to the unique constraints of permafrost environments often calls for novel process descriptions for proper representation. Understanding the temporal coherence and time delays between surface soil respiration and subsurface carbon production, which are controlled by numerous parameters such as soil texture, water content, and temperature, remains a challenge. This review highlights the need for comprehensive models that integrate thermo-hydro-biogeochemical processes to understand permafrost system dynamics in the context of changing climatic circumstances. Furthermore, it emphasizes the need for rigorous validation procedures to reduce model complexity biases.<br/></div> © 2024 The Authors},\nkey = {Climate change},\n%keywords = {Bacteria;Carbon;Climate models;Feedback;Gas emissions;Greenhouse gases;Permafrost;Textures;},\n%note = {Biogenic activity;Carbon fluxes;Greenhouse gas emissions;Microbial activities;Modelling tools;Paper analysis;Permafrost carbon feedback;Plant-microbe interactions;Review papers;Soil respiration;},\nURL = {http://dx.doi.org/10.1016/j.scitotenv.2024.173144},\n} \n\n\n
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This review paper analyses the significance of microbial activity in permafrost carbon feedback (PCF) and emphasizes the necessity for enhanced modeling tools to appropriately predict carbon fluxes associated with permafrost thaw. Beginning with an overview of experimental findings, both in situ and laboratory, it stresses the key role of microbes and plants in PCF. The research investigates several modeling techniques, starting with current models of soil respiration and plant-microorganism interactions built outside of the context of permafrost, and then moving on to specific models dedicated to PCF. The review of the current literature reveals the complex nature of permafrost ecosystems, where various geophysical factors have considerable effects on greenhouse gas emissions. Soil properties, plant types, and time scales all contribute to carbon dynamics. Process-based models are widely used for simulating greenhouse gas production, transport, and emissions. While these models are beneficial at capturing soil respiration complexity, adjusting them to the unique constraints of permafrost environments often calls for novel process descriptions for proper representation. Understanding the temporal coherence and time delays between surface soil respiration and subsurface carbon production, which are controlled by numerous parameters such as soil texture, water content, and temperature, remains a challenge. This review highlights the need for comprehensive models that integrate thermo-hydro-biogeochemical processes to understand permafrost system dynamics in the context of changing climatic circumstances. Furthermore, it emphasizes the need for rigorous validation procedures to reduce model complexity biases.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Improved lumped parameter model for shear wall–frame structures with geometric and material nonlinearities.\n \n \n \n \n\n\n \n Tang, Y.; Cai, C.; and Xie, Y.\n\n\n \n\n\n\n Journal of Building Engineering, 91. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ImprovedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242216159401 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Improved lumped parameter model for shear wall–frame structures with geometric and material nonlinearities},\njournal = {Journal of Building Engineering},\nauthor = {Tang, Yuchuan and Cai, Changpeng and Xie, Yazhou},\nvolume = {91},\nyear = {2024},\nissn = {23527102},\nabstract = {<div data-language="eng" data-ev-field="abstract">Lumped parameter macroscopic structural models, such as those consisting of springs and rigid sticks, are useful for parametric studies and probabilistic analyses of individual building structures as well as for regional-level assessments on building stock. The existing lumped parameter models (LPMs) for shear wall–frame dual systems exhibit some drawbacks. There is a discrepancy in their arrangement of springs. They are calibrated to match only two modal periods of the original multi-story or even high-rise building structure. The existing models also have limitations when confronted with the P-Δ effect. After a careful investigation, this paper developed new schemes of spring-stick assemblies that accurately reproduce the elastic stiffness matrix of a two-dimensional Euler–Bernoulli or Timoshenko beam–column element and cope with geometric and material nonlinearities. The developed assemblies, which are essentially lumped parameter substitutes for beam–column elements, can be used to build LPMs for moment frames and shear walls. For moment frames, the traditional fishbone model is converted into a LPM that not only reflects the beam-to-column stiffness ratio and strength ratio but also captures the P-Δ effect. Combining the LPM for shear wall with the lumped parameter fishbone model results in an improved LPM for wall–frame dual systems. Together with lumped floor masses, the improved LPM is able to accurately predict all the global vibration modes and nonlinear seismic responses of a dual system. The proposed LPM possesses distinct advantages when simplified macroscopic models are preferred for building structures.<br/></div> © 2024 Elsevier Ltd},\nkey = {Shear walls},\n%keywords = {Lumped parameter networks;Stiffness;Stiffness matrix;Tall buildings;},\n%note = {Beam column element;Building structure;Dual system;Fishbone;Fishbone model;Geometric and material nonlinearities;Lumped parameter modelling;Lumped-parameter;Moment frames;Shear wall frames;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2024.109633},\n} \n\n\n
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Lumped parameter macroscopic structural models, such as those consisting of springs and rigid sticks, are useful for parametric studies and probabilistic analyses of individual building structures as well as for regional-level assessments on building stock. The existing lumped parameter models (LPMs) for shear wall–frame dual systems exhibit some drawbacks. There is a discrepancy in their arrangement of springs. They are calibrated to match only two modal periods of the original multi-story or even high-rise building structure. The existing models also have limitations when confronted with the P-Δ effect. After a careful investigation, this paper developed new schemes of spring-stick assemblies that accurately reproduce the elastic stiffness matrix of a two-dimensional Euler–Bernoulli or Timoshenko beam–column element and cope with geometric and material nonlinearities. The developed assemblies, which are essentially lumped parameter substitutes for beam–column elements, can be used to build LPMs for moment frames and shear walls. For moment frames, the traditional fishbone model is converted into a LPM that not only reflects the beam-to-column stiffness ratio and strength ratio but also captures the P-Δ effect. Combining the LPM for shear wall with the lumped parameter fishbone model results in an improved LPM for wall–frame dual systems. Together with lumped floor masses, the improved LPM is able to accurately predict all the global vibration modes and nonlinear seismic responses of a dual system. The proposed LPM possesses distinct advantages when simplified macroscopic models are preferred for building structures.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Structural characterisation of Eastern Canada’s old industrial masonry buildings via typological analysis: part II – building database analysis.\n \n \n \n \n\n\n \n Davis, L.; and Malomo, D.\n\n\n \n\n\n\n Proceedings of the Institution of Civil Engineers - Engineering History and Heritage, 177(3): 96 - 106. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"StructuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243416924700 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Structural characterisation of Eastern Canada’s old industrial masonry buildings via typological analysis: part II – building database analysis},\njournal = {Proceedings of the Institution of Civil Engineers - Engineering History and Heritage},\nauthor = {Davis, Lucy and Malomo, Daniele},\nvolume = {177},\nnumber = {3},\nyear = {2024},\npages = {96 - 106},\nissn = {17579430},\nabstract = {<div data-language="eng" data-ev-field="abstract">The typological analysis conducted in the companion paper is further expanded within this work through the critical analysis of a new extensive building database specifically conceived for old industrial masonry buildings in Eastern Canada. The identification of recurrent unreinforced masonry (URM) building archetypes in this low-to-moderate seismic region is essential to decrease uncertainties currently prevalent in the analysis of local old URM structures, often targeted for adaptive reuse. The database assembled herein comprises various heritage designated buildings across Eastern Canada and was compiled harmonising existing repositories at the federal, provincial and municipal level with an unprecedented focus on structural features. The characteristics of these resources are quantitatively analysed and applied to a case study of the city of Montréal, one of the most important industrial centres in nineteenth and twentieth century Canada. Outcomes from this study will guide practitioners and researchers involved in the structural and seismic assessment and retrofit of old industrial URM constructions, enable more and less invasive rational retrofit designs and inform the new Existing Structures provisions to be included in the 2030 National Building Code of Canada.<br/></div> © 2024 ICE Publishing. All rights reserved.},\nkey = {Retrofitting},\n%keywords = {Arches;Masonry materials;Office buildings;Seismic design;},\n%note = {Building database;Building design;Building structure;Database analysis;Eastern Canada;Masonry;Masonry building;Structural characterization;Structure design;Typological analyze;},\nURL = {http://dx.doi.org/10.1680/jenhh.24.00011},\n} \n\n\n
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The typological analysis conducted in the companion paper is further expanded within this work through the critical analysis of a new extensive building database specifically conceived for old industrial masonry buildings in Eastern Canada. The identification of recurrent unreinforced masonry (URM) building archetypes in this low-to-moderate seismic region is essential to decrease uncertainties currently prevalent in the analysis of local old URM structures, often targeted for adaptive reuse. The database assembled herein comprises various heritage designated buildings across Eastern Canada and was compiled harmonising existing repositories at the federal, provincial and municipal level with an unprecedented focus on structural features. The characteristics of these resources are quantitatively analysed and applied to a case study of the city of Montréal, one of the most important industrial centres in nineteenth and twentieth century Canada. Outcomes from this study will guide practitioners and researchers involved in the structural and seismic assessment and retrofit of old industrial URM constructions, enable more and less invasive rational retrofit designs and inform the new Existing Structures provisions to be included in the 2030 National Building Code of Canada.
© 2024 ICE Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Structural characterization of Eastern Canada’s old industrial masonry buildings via typological analysis: part I – construction technologies through time.\n \n \n \n \n\n\n \n Davis, L.; and Malomo, D.\n\n\n \n\n\n\n Proceedings of the Institution of Civil Engineers - Engineering History and Heritage, 177(3): 83 - 95. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"StructuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20243416912313 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Structural characterization of Eastern Canada’s old industrial masonry buildings via typological analysis: part I – construction technologies through time},\njournal = {Proceedings of the Institution of Civil Engineers - Engineering History and Heritage},\nauthor = {Davis, Lucy and Malomo, Daniele},\nvolume = {177},\nnumber = {3},\nyear = {2024},\npages = {83 - 95},\nissn = {17579430},\nabstract = {<div data-language="eng" data-ev-field="abstract">Industrial unreinforced masonry (URM) buildings are an important part of the existing building stock in Eastern Canada, a region characterised by high-frequency and low-to-moderate magnitude earthquakes. Despite their inherent vulnerability to earthquakes, these non-engineered buildings are being increasingly targeted for reuse purposes in many densely populated cities in the region. A lack of knowledge of local construction techniques, materials and architectural types paired with limited information of their characteristics leads seismic retrofits to be even more disruptive than usual. Often, such seismic retrofits result in expensive and complex designs or avoidable partial demolitions. Typological analysis is utilised in this work to identify local recurrent building archetypes and technologies through archival resources, as well as their evolution through time, as a first step to addressing the lack of information about the structural characteristics of this building type. Results from this study inform subsequent critical and more quantitative investigations conducted in the companion paper, where the first building database focusing on Eastern Canada’s old industrial URM constructions is presented and comprehensively reviewed. This research will enable engineering practitioners and applied researchers to decrease epistemic uncertainties and confidence factors in their structural/seismic assessments, vital to develop rational retrofits.<br/></div> © 2024 ICE Publishing. All rights reserved.},\nkey = {Earthquakes},\n%keywords = {Architectural design;Demolition;Historic preservation;Masonry materials;Office buildings;Retrofitting;Seismic design;Seismic response;Structural analysis;},\n%note = {Building design;Building structure;Eastern Canada;Masonry building;Seismic retrofits;Structural characterization;Structure design;Typological analyze;Unreinforced masonries (URMs);Unreinforced masonry building;},\nURL = {http://dx.doi.org/10.1680/jenhh.24.00010},\n} \n\n\n
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Industrial unreinforced masonry (URM) buildings are an important part of the existing building stock in Eastern Canada, a region characterised by high-frequency and low-to-moderate magnitude earthquakes. Despite their inherent vulnerability to earthquakes, these non-engineered buildings are being increasingly targeted for reuse purposes in many densely populated cities in the region. A lack of knowledge of local construction techniques, materials and architectural types paired with limited information of their characteristics leads seismic retrofits to be even more disruptive than usual. Often, such seismic retrofits result in expensive and complex designs or avoidable partial demolitions. Typological analysis is utilised in this work to identify local recurrent building archetypes and technologies through archival resources, as well as their evolution through time, as a first step to addressing the lack of information about the structural characteristics of this building type. Results from this study inform subsequent critical and more quantitative investigations conducted in the companion paper, where the first building database focusing on Eastern Canada’s old industrial URM constructions is presented and comprehensively reviewed. This research will enable engineering practitioners and applied researchers to decrease epistemic uncertainties and confidence factors in their structural/seismic assessments, vital to develop rational retrofits.
© 2024 ICE Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Novel enhanced slip-resistant inter-modular connections with cementitious non-shrink grout: Experimental and numerical studies.\n \n \n \n \n\n\n \n Bazarchi, E.; Davaran, A.; Lamarche, C.; Roy, N.; Gagne, R.; and Parent, S.\n\n\n \n\n\n\n Structures, 66. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"NovelPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242716646693 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Novel enhanced slip-resistant inter-modular connections with cementitious non-shrink grout: Experimental and numerical studies},\njournal = {Structures},\nauthor = {Bazarchi, Ehsan and Davaran, Ali and Lamarche, Charles-Philippe and Roy, Nathalie and Gagne, Richard and Parent, Serge},\nvolume = {66},\nyear = {2024},\nissn = {23520124},\nabstract = {<div data-language="eng" data-ev-field="abstract">Efficient inter-modular connections are key components that affect the construction speed and structural performance of modular building structures. While uplift-unconstrained connections constructed with tolerances are convenient options to facilitate assembling gravity-force-resisting modules, they may not satisfy serviceability limit states because of their potential to slip. This study proposes two types of inter-modular connections in which the slip is mitigated/blocked by employing mechanisms with a cementitious non-shrink grout mixture: (1) grout is poured directly into the connection zone inside a hollow-core structural section column; (2) grout is poured into an exterior built-up shear key zone. The behaviors of the enhanced connections were investigated experimentally and numerically in material, connection, and building structure levels. The results showed that the proposed cementitious non-shrink grout mixture is fluid, resistant, and does not shrink. The connection test results confirmed that both types of enhanced connections show superior mechanical performance compared to their "basic" counterpart (without grout). Both types of grouted connections can be adopted in modular building structures based on the specific project's logistics and manufacturers’ facilities. The nonlinear analyses performed on a 12-story prototype model of a modular building structure revealed that the serviceability issues caused by potential slips in inter-modular connection components are overcome by using the grouted inter-modular connections in specific stories.<br/></div> © 2024},\nkey = {Mortar},\n%keywords = {Buildings;Concrete construction;Gravitation;Grouting;Modular construction;Structural analysis;},\n%note = {Building structure;Cementitious;Gravity forces;Gravity-force-resisting module;Inter-modular connection;Modular building structure;Modular buildings;Modulars;Non-shrinkable grout;Slip;},\nURL = {http://dx.doi.org/10.1016/j.istruc.2024.106817},\n} \n\n\n
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Efficient inter-modular connections are key components that affect the construction speed and structural performance of modular building structures. While uplift-unconstrained connections constructed with tolerances are convenient options to facilitate assembling gravity-force-resisting modules, they may not satisfy serviceability limit states because of their potential to slip. This study proposes two types of inter-modular connections in which the slip is mitigated/blocked by employing mechanisms with a cementitious non-shrink grout mixture: (1) grout is poured directly into the connection zone inside a hollow-core structural section column; (2) grout is poured into an exterior built-up shear key zone. The behaviors of the enhanced connections were investigated experimentally and numerically in material, connection, and building structure levels. The results showed that the proposed cementitious non-shrink grout mixture is fluid, resistant, and does not shrink. The connection test results confirmed that both types of enhanced connections show superior mechanical performance compared to their \"basic\" counterpart (without grout). Both types of grouted connections can be adopted in modular building structures based on the specific project's logistics and manufacturers’ facilities. The nonlinear analyses performed on a 12-story prototype model of a modular building structure revealed that the serviceability issues caused by potential slips in inter-modular connection components are overcome by using the grouted inter-modular connections in specific stories.
© 2024\n
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\n \n\n \n \n \n \n \n \n Directional alongwind and crosswind effects on the performance of a 15-storey steel braced frame building in seismic environment.\n \n \n \n \n\n\n \n Athanasiou, A.; Tirca, L.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 251. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"DirectionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242516265358 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Directional alongwind and crosswind effects on the performance of a 15-storey steel braced frame building in seismic environment},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Athanasiou, Anastasia and Tirca, Lucia and Stathopoulos, Ted},\nvolume = {251},\nyear = {2024},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">The effect of crosswind loads on buildings has been studied since the 1980s, but only a few researchers reported on the nonlinear response of tall buildings under ultimate crosswind loads. Performance-based wind design procedures provide a structurally efficient and economical alternative to prescriptive code based design, however their establishment necessitates further research in the following areas: i) development of a straightforward procedure for the derivation of reliable wind time-history loadings from wind tunnel data; ii) assessment of the dynamic behavior of tall buildings excited by wind in the full range of response: linear-nonlinear-near collapse; and iii) quantification of the effect of directionality on building performance in the full range of response. Herein, local aerodynamic data are used to produce reliable estimations of the directional alongwind and crosswind time-history loadings for a 15-storey steel braced frame hospital building, in Montreal, Canada. The case study is designed to withstand the code-based wind and earthquake loads, as independent load combination cases. Then, advanced finite element models are employed to assess the effect of directional alongwind and crosswind loads on the building performance under increasing levels of input wind motion. Ten excitation angles from 0° to 90° are considered. Incremental dynamic analysis is employed to assess the building performance under recurring winds, including the wind directionality effect. To monitor fatigue failure, the rainflow counting method is used to approximate the number and amplitude of loading cycles exhibited by ductile brace members of the lateral force resisting system.<br/></div> © 2024},\nkey = {Tall buildings},\n%keywords = {Aerodynamics;Architectural design;Ductile fracture;Loads (forces);Nonlinear analysis;Structural design;Structural frames;Wind tunnels;},\n%note = {Aerodynamic data;Alongwind;Building performance;Crosswind;Crosswind effect;Incremental dynamic analysis;Non-linear modelling;Performance;Steel braced frames;Steel buildings;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2024.105790},\n} \n\n\n
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The effect of crosswind loads on buildings has been studied since the 1980s, but only a few researchers reported on the nonlinear response of tall buildings under ultimate crosswind loads. Performance-based wind design procedures provide a structurally efficient and economical alternative to prescriptive code based design, however their establishment necessitates further research in the following areas: i) development of a straightforward procedure for the derivation of reliable wind time-history loadings from wind tunnel data; ii) assessment of the dynamic behavior of tall buildings excited by wind in the full range of response: linear-nonlinear-near collapse; and iii) quantification of the effect of directionality on building performance in the full range of response. Herein, local aerodynamic data are used to produce reliable estimations of the directional alongwind and crosswind time-history loadings for a 15-storey steel braced frame hospital building, in Montreal, Canada. The case study is designed to withstand the code-based wind and earthquake loads, as independent load combination cases. Then, advanced finite element models are employed to assess the effect of directional alongwind and crosswind loads on the building performance under increasing levels of input wind motion. Ten excitation angles from 0° to 90° are considered. Incremental dynamic analysis is employed to assess the building performance under recurring winds, including the wind directionality effect. To monitor fatigue failure, the rainflow counting method is used to approximate the number and amplitude of loading cycles exhibited by ductile brace members of the lateral force resisting system.
© 2024\n
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\n \n\n \n \n \n \n \n \n Performance-based ice engineering framework: A data-driven multi-scale approach.\n \n \n \n \n\n\n \n Snaiki, R.\n\n\n \n\n\n\n Cold Regions Science and Technology, 224. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"Performance-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242416244904 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance-based ice engineering framework: A data-driven multi-scale approach},\njournal = {Cold Regions Science and Technology},\nauthor = {Snaiki, Reda},\nvolume = {224},\nyear = {2024},\nissn = {0165232X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Ice storms are one of the most devastating natural hazards which have the potential to inflict significant damage to the built environment. The multi-hazard nature of ice events complicates the analysis of their induced risk due to their inherent nonlinear interactions. In addition, the concurrent and interacting hazards are often responsible for several aerodynamical/dynamical instabilities such as the galloping mechanism. Moreover, the existing risk approaches are usually not suited for large-scale risk evaluation over extended geographical regions due to the involved high-computational costs. Therefore, in this study, a novel data-driven multi-scale performance-based ice engineering (PBIE) framework is developed to support the design of new structures subjected to ice storms or the rehabilitation of existing ones. In addition, the proposed PBIE is capable of rapidly estimating the real-time risk over an extended region due to an ice event. Specifically, it leverages the superior capabilities of state-of-the-art data-driven techniques (e.g., machine learning) to efficiently generate the corresponding risk maps and identify the high-risk areas. The proposed PBIE framework is applied to a simplified example in which the galloping-induced risk on iced conductors, in terms of the galloping amplitude, is evaluated for both local and regional scales. The resulting PBIE framework can be readily applied for design or retrofitting purposes or integrated within an emergency response management system to inform preventive actions that can mitigate the ice storm-induced damages and save lives.<br/></div> © 2024},\nkey = {Ice},\n%keywords = {Geographical regions;Hazards;Maps;Risk assessment;Risk perception;Storms;},\n%note = {Data driven;Data driven technique;Engineering frameworks;Ice engineering;Ice storm;Multiple hazards;Performance based;Performance-based engineering;Regional risk;Structural risks;},\nURL = {http://dx.doi.org/10.1016/j.coldregions.2024.104247},\n} \n\n\n
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Ice storms are one of the most devastating natural hazards which have the potential to inflict significant damage to the built environment. The multi-hazard nature of ice events complicates the analysis of their induced risk due to their inherent nonlinear interactions. In addition, the concurrent and interacting hazards are often responsible for several aerodynamical/dynamical instabilities such as the galloping mechanism. Moreover, the existing risk approaches are usually not suited for large-scale risk evaluation over extended geographical regions due to the involved high-computational costs. Therefore, in this study, a novel data-driven multi-scale performance-based ice engineering (PBIE) framework is developed to support the design of new structures subjected to ice storms or the rehabilitation of existing ones. In addition, the proposed PBIE is capable of rapidly estimating the real-time risk over an extended region due to an ice event. Specifically, it leverages the superior capabilities of state-of-the-art data-driven techniques (e.g., machine learning) to efficiently generate the corresponding risk maps and identify the high-risk areas. The proposed PBIE framework is applied to a simplified example in which the galloping-induced risk on iced conductors, in terms of the galloping amplitude, is evaluated for both local and regional scales. The resulting PBIE framework can be readily applied for design or retrofitting purposes or integrated within an emergency response management system to inform preventive actions that can mitigate the ice storm-induced damages and save lives.
© 2024\n
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\n \n\n \n \n \n \n \n \n A metaheuristic-optimization-based neural network for icing prediction on transmission lines.\n \n \n \n \n\n\n \n Snaiki, R.; Jamali, A.; Rahem, A.; Shabani, M.; and Barjenbruch, B. L.\n\n\n \n\n\n\n Cold Regions Science and Technology, 224. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242416254518 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A metaheuristic-optimization-based neural network for icing prediction on transmission lines},\njournal = {Cold Regions Science and Technology},\nauthor = {Snaiki, Reda and Jamali, Abdeslam and Rahem, Ahmed and Shabani, Mehdi and Barjenbruch, Brian L.},\nvolume = {224},\nyear = {2024},\nissn = {0165232X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Ice accretion on overhead transmission line systems is a leading cause of power outages and can lead to substantial economic losses in northern regions. Therefore, accurately and rapidly predicting ice accretion on power lines is crucial for ensuring the safe operation of the power grid. This study introduces a machine learning method for predicting the ice-to-liquid ratio (ILR), an important parameter for assessing ice accretion efficiency. While estimating ILR is vital for operational forecasting, many existing ice accretion models do not include this capability. A feedforward neural network (FFNN) trained with stochastic gradient descent and various metaheuristic optimizers - specifically particle swarm optimization, grey wolf optimizer, whale optimizer, and slime mold optimizer - is employed to forecast hourly ILR. Environmental data required for training and testing the FFNN model were obtained from the Automated Surface Observing System (ASOS). A global sensitivity analysis using the Sobol index, evaluated via the coefficients of a polynomial chaos expansion, was conducted to identify the most influential input parameters. The results indicate that only four input parameters significantly contribute to the variance in the response: precipitation, temperature, dew point temperature, and wind speed. Furthermore, the FFNN model trained with metaheuristic optimizers outperformed the stochastic gradient descent approach. With the predicted ILR, ice accumulation can be easily calculated as the product of ILR and the amount of liquid precipitation depth.<br/></div> © 2024},\nkey = {Ice},\n%keywords = {Electric power transmission;Electric power transmission networks;Feedforward neural networks;Forecasting;Gradient methods;Losses;Machine learning;Outages;Overhead lines;Sensitivity analysis;Stochastic models;Stochastic systems;Wind;},\n%note = {Features selection;Ice accretion;Ice-to-liquid ratio;Input parameter;Machine-learning;Metaheuristic;Metaheuristic optimizer;Neural network model;Optimizers;Stochastic gradient descent;},\nURL = {http://dx.doi.org/10.1016/j.coldregions.2024.104249},\n} \n\n\n
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Ice accretion on overhead transmission line systems is a leading cause of power outages and can lead to substantial economic losses in northern regions. Therefore, accurately and rapidly predicting ice accretion on power lines is crucial for ensuring the safe operation of the power grid. This study introduces a machine learning method for predicting the ice-to-liquid ratio (ILR), an important parameter for assessing ice accretion efficiency. While estimating ILR is vital for operational forecasting, many existing ice accretion models do not include this capability. A feedforward neural network (FFNN) trained with stochastic gradient descent and various metaheuristic optimizers - specifically particle swarm optimization, grey wolf optimizer, whale optimizer, and slime mold optimizer - is employed to forecast hourly ILR. Environmental data required for training and testing the FFNN model were obtained from the Automated Surface Observing System (ASOS). A global sensitivity analysis using the Sobol index, evaluated via the coefficients of a polynomial chaos expansion, was conducted to identify the most influential input parameters. The results indicate that only four input parameters significantly contribute to the variance in the response: precipitation, temperature, dew point temperature, and wind speed. Furthermore, the FFNN model trained with metaheuristic optimizers outperformed the stochastic gradient descent approach. With the predicted ILR, ice accumulation can be easily calculated as the product of ILR and the amount of liquid precipitation depth.
© 2024\n
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\n \n\n \n \n \n \n \n \n Subduction and Shallow Earthquake Demand on Coupled Composite Plate Shear Wall-Concrete-Filled System.\n \n \n \n \n\n\n \n Koirala, A.; Kizilarslan, E.; Bruneau, M.; and Tremblay, R.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 150(8). 2024.\n \n\n\n\n
\n\n\n\n \n \n \"SubductionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242316212977 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Subduction and Shallow Earthquake Demand on Coupled Composite Plate Shear Wall-Concrete-Filled System},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Koirala, Ashim and Kizilarslan, Emre and Bruneau, Michel and Tremblay, Robert},\nvolume = {150},\nnumber = {8},\nyear = {2024},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">This brief technical %note compares the adjusted collapsed margin ratios for concrete-filled coupled composite plate steel walls, as obtained from the FEMA P695 methodology, separately considering only subduction zone earthquakes and only shallow earthquakes. For shallow earthquakes, collapse margin ratios were similar to those obtained in prior studies, but they were substantially smaller for the set of subduction earthquakes. While both sets of collapse margin ratios were considered to provide satisfactory seismic performance, this study provides insights into the impact of considering subduction earthquakes in FEMA P695 studies and, by inference, on expected collapse margin ratio for subduction earthquakes.<br/></div> © 2024 American Society of Civil Engineers.},\nkey = {Shear walls},\n%keywords = {Concretes;Earthquakes;Plates (structural components);Seismic waves;Shear flow;},\n%note = {Collapse;Composite plates;Coupled composite plate shear wall;FEMA p695 methodology;Performance factors;Seismic effect;Seismic Performance;Seismic performance factor;Subduction earthquakes;},\nURL = {http://dx.doi.org/10.1061/JSENDH.STENG-12704},\n} \n\n\n
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This brief technical %note compares the adjusted collapsed margin ratios for concrete-filled coupled composite plate steel walls, as obtained from the FEMA P695 methodology, separately considering only subduction zone earthquakes and only shallow earthquakes. For shallow earthquakes, collapse margin ratios were similar to those obtained in prior studies, but they were substantially smaller for the set of subduction earthquakes. While both sets of collapse margin ratios were considered to provide satisfactory seismic performance, this study provides insights into the impact of considering subduction earthquakes in FEMA P695 studies and, by inference, on expected collapse margin ratio for subduction earthquakes.
© 2024 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Enabling efficient regional seismic fragility assessment of multi-component bridge portfolios through Gaussian process regression and active learning.\n \n \n \n \n\n\n \n Ning, C.; Xie, Y.; Burton, H.; and Padgett, J. E.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 53(9): 2929 - 2949. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"EnablingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242016077663 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Enabling efficient regional seismic fragility assessment of multi-component bridge portfolios through Gaussian process regression and active learning},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Ning, Chunxiao and Xie, Yazhou and Burton, Henry and Padgett, Jamie E.},\nvolume = {53},\nnumber = {9},\nyear = {2024},\npages = {2929 - 2949},\nissn = {00988847},\nabstract = {<div data-language="eng" data-ev-field="abstract">Regional seismic fragility assessment of bridge portfolios must address the embedded uncertainties and variations stemming from both the earthquake hazard and bridge attributes (e.g., geometry, material, design detail). To achieve bridge-specific fragility assessment, multivariate probabilistic seismic demand models (PSDM) have recently been developed that use both the ground motion intensity measure and bridge parameters as inputs. However, explicitly utilizing bridge parameters as inputs requires numerous nonlinear response history analyses (NRHAs). In this situation, the associated computational cost increases exponentially for high-fidelity bridge models with complex component connectivity and sophisticated material constitutive laws. Moreover, it remains unclear how many analyses are sufficient for the response data and the resulting demand model to cover the entire solution space without overfitting. To deal with these issues, this study integrates Gaussian process regression (GPR) and active learning (AL) into a multistep workflow to achieve efficient regional seismic fragility assessment of bridge portfolios. The GPR relaxes the probability distribution assumptions made in typical cloud analysis-based PSDMs to enable heteroskedastic nonparametric seismic demand modeling. The AL leverages the varying standard deviation to select the least but most representative bridge-model-ground-motion sample pairs to conduct NRHA with much-improved efficiency. Both independent and correlated multi-output GPRs are proposed to deal with bridge portfolios with seismic demand correlations among multiple components (column, bearing, shear key, abutment, unseating, and joint seal). Considering a single benchmark highway bridge class in California as the case study, the AL-GPR framework and the associated component-level fragility results are investigated in terms of their efficiency, accuracy, and robustness. The fragility results show that 70 AL-selected samples would enable the GPR to derive bridge-specific fragility models comparable to the ones using the multiple stripes analysis approach with 1950 ground motions considered for each individual bridge. The AL-GPR model also successfully captures the physics of how bridge span length, deck area, column slenderness, and steel reinforcement ratio would change the damage state exceedance probabilities of different bridge components. The efficiency of AL stems from the fact that, with the multi-output independent GPR, a stable and reliable fragility model can be achieved using 50 AL-selected samples compared to at least 270 randomly chosen samples. The proposed methodology advances the state of the art in enabling more efficient and reliable regional seismic fragility assessment of multi-component bridge portfolios.<br/></div> © 2024 The Authors. Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd.},\nkey = {Bridges},\n%keywords = {Earthquakes;Efficiency;Gaussian distribution;Gaussian noise (electronic);Learning systems;Regression analysis;Seismic design;Structural dynamics;},\n%note = {Active Learning;Demand correlation;Demand modelling;Fragility assessment;Gaussian process regression;Multi-component bridge class;Multicomponents;Multivariate surrogate demand model;Regional seismic fragility assessment;Seismic demand correlation;Seismic demands;Seismic fragility;},\nURL = {http://dx.doi.org/10.1002/eqe.4144},\n} \n\n\n
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Regional seismic fragility assessment of bridge portfolios must address the embedded uncertainties and variations stemming from both the earthquake hazard and bridge attributes (e.g., geometry, material, design detail). To achieve bridge-specific fragility assessment, multivariate probabilistic seismic demand models (PSDM) have recently been developed that use both the ground motion intensity measure and bridge parameters as inputs. However, explicitly utilizing bridge parameters as inputs requires numerous nonlinear response history analyses (NRHAs). In this situation, the associated computational cost increases exponentially for high-fidelity bridge models with complex component connectivity and sophisticated material constitutive laws. Moreover, it remains unclear how many analyses are sufficient for the response data and the resulting demand model to cover the entire solution space without overfitting. To deal with these issues, this study integrates Gaussian process regression (GPR) and active learning (AL) into a multistep workflow to achieve efficient regional seismic fragility assessment of bridge portfolios. The GPR relaxes the probability distribution assumptions made in typical cloud analysis-based PSDMs to enable heteroskedastic nonparametric seismic demand modeling. The AL leverages the varying standard deviation to select the least but most representative bridge-model-ground-motion sample pairs to conduct NRHA with much-improved efficiency. Both independent and correlated multi-output GPRs are proposed to deal with bridge portfolios with seismic demand correlations among multiple components (column, bearing, shear key, abutment, unseating, and joint seal). Considering a single benchmark highway bridge class in California as the case study, the AL-GPR framework and the associated component-level fragility results are investigated in terms of their efficiency, accuracy, and robustness. The fragility results show that 70 AL-selected samples would enable the GPR to derive bridge-specific fragility models comparable to the ones using the multiple stripes analysis approach with 1950 ground motions considered for each individual bridge. The AL-GPR model also successfully captures the physics of how bridge span length, deck area, column slenderness, and steel reinforcement ratio would change the damage state exceedance probabilities of different bridge components. The efficiency of AL stems from the fact that, with the multi-output independent GPR, a stable and reliable fragility model can be achieved using 50 AL-selected samples compared to at least 270 randomly chosen samples. The proposed methodology advances the state of the art in enabling more efficient and reliable regional seismic fragility assessment of multi-component bridge portfolios.
© 2024 The Authors. Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n An efficient procedure for modal seismic response analysis of axisymmetric structures surrounded by water.\n \n \n \n \n\n\n \n Kouhdasti, R.; and Bouaanani, N.\n\n\n \n\n\n\n Ocean Engineering, 304. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241715958464 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An efficient procedure for modal seismic response analysis of axisymmetric structures surrounded by water},\njournal = {Ocean Engineering},\nauthor = {Kouhdasti, Ramtin and Bouaanani, Najib},\nvolume = {304},\nyear = {2024},\nissn = {00298018},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents a new procedure for the seismic response assessment of water-surrounded axisymmetric structures through the inclusion of earthquake-induced hydrodynamic effects into input ground motion accelerations. The resulting modified time-history and spectral ground motion accelerations can then be applied directly to the dry axisymmetric structure (i.e. without water) through dynamic modal superposition or response spectrum analyses. Therefore, recourse to specialized software accounting for fluid–structure interaction dynamic effects can be avoided. The proposed approach evaluates the individual impact of hydrodynamic effects associated with any specific structural vibration mode on the global structural seismic response. The procedure implements hydrodynamic pressure formulation or simplified added masses as an alternative to classical nodal lumping. A hydrodynamic modification factor to efficiently estimate amplification or de-amplification of acceleration seismic demands due to earthquake-induced hydrodynamic effects is proposed. The application of the proposed methods is illustrated numerically through examples of three water-surrounded axisymmetric structures subjected to two earthquakes. The results of key response indicators, including relative displacements, base shear, and stresses are shown to be in excellent agreement with the coupled finite element solutions. The coupled effects of hydrodynamic-pressure and structural flexibility on the seismic behaviour of the studied systems are discussed.<br/></div> © 2024 The Authors},\nkey = {Seismic response},\n%keywords = {Acceleration;Earthquakes;Hydrodynamics;Modal analysis;Spectrum analysis;Structural dynamics;},\n%note = {Axisymmetric;Axisymmetric water–structure system;Dynamic modal superposition;Fluid-structure interaction;Hydrodynamic pressure;Modal superposition;Modal time-history analyse;Simplified method;Structure systems;Time history analysis;Water structure;},\nURL = {http://dx.doi.org/10.1016/j.oceaneng.2024.117771},\n} \n\n\n
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This paper presents a new procedure for the seismic response assessment of water-surrounded axisymmetric structures through the inclusion of earthquake-induced hydrodynamic effects into input ground motion accelerations. The resulting modified time-history and spectral ground motion accelerations can then be applied directly to the dry axisymmetric structure (i.e. without water) through dynamic modal superposition or response spectrum analyses. Therefore, recourse to specialized software accounting for fluid–structure interaction dynamic effects can be avoided. The proposed approach evaluates the individual impact of hydrodynamic effects associated with any specific structural vibration mode on the global structural seismic response. The procedure implements hydrodynamic pressure formulation or simplified added masses as an alternative to classical nodal lumping. A hydrodynamic modification factor to efficiently estimate amplification or de-amplification of acceleration seismic demands due to earthquake-induced hydrodynamic effects is proposed. The application of the proposed methods is illustrated numerically through examples of three water-surrounded axisymmetric structures subjected to two earthquakes. The results of key response indicators, including relative displacements, base shear, and stresses are shown to be in excellent agreement with the coupled finite element solutions. The coupled effects of hydrodynamic-pressure and structural flexibility on the seismic behaviour of the studied systems are discussed.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Unified life-cycle cost–benefit analysis framework and critical review for sustainable retrofit of Canada’s existing buildings using mass timber.\n \n \n \n \n\n\n \n Malomo, D.; Xie, Y.; and Doudak, G.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 51(7): 687 - 703. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"UnifiedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242916707824 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Unified life-cycle cost–benefit analysis framework and critical review for sustainable retrofit of Canada’s existing buildings using mass timber},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Malomo, D. and Xie, Y. and Doudak, G.},\nvolume = {51},\nnumber = {7},\nyear = {2024},\npages = {687 - 703},\nissn = {03151468},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper investigates the possibilities and challenges of using mass timber as a sustainable alternative for retrofitting existing buildings in Canada. To create the knowledge foundation on which to devise a holistic framework tailored to the specific characteristics of Canada’s built environment, a detailed analysis of the types, geographical distribution, structural, and energy features of the local building stock is first presented. Then, previous strategies for enhancing and upgrading existing buildings with engineered timber are reviewed, classified, and evaluated. Finally, to explore economic and environmental implications, a detailed assessment of available life-cycle cost–benefit analysis approaches is conducted alongside their adaptation to Canada’s building context. The findings of this paper can inform policymakers, builders, and designers in developing more sustainable building retrofit practices, design, and regulations, in line with Canada’s efforts toward net zero emissions.<br/></div> © 2023 The Author(s).},\nkey = {Timber},\n%keywords = {Costs;Geographical distribution;Intelligent buildings;Life cycle;Sustainable development;},\n%note = {Analysis frameworks;Built environment;Critical review;Distribution features;Energy retrofit;Existing building;Holistic frameworks;Life-cycle cost-benefit analysis;Mass timber;Structural retrofit;},\nURL = {http://dx.doi.org/10.1139/cjce-2023-0222},\n} \n\n\n
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This paper investigates the possibilities and challenges of using mass timber as a sustainable alternative for retrofitting existing buildings in Canada. To create the knowledge foundation on which to devise a holistic framework tailored to the specific characteristics of Canada’s built environment, a detailed analysis of the types, geographical distribution, structural, and energy features of the local building stock is first presented. Then, previous strategies for enhancing and upgrading existing buildings with engineered timber are reviewed, classified, and evaluated. Finally, to explore economic and environmental implications, a detailed assessment of available life-cycle cost–benefit analysis approaches is conducted alongside their adaptation to Canada’s building context. The findings of this paper can inform policymakers, builders, and designers in developing more sustainable building retrofit practices, design, and regulations, in line with Canada’s efforts toward net zero emissions.
© 2023 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Seismic performance assessment of post-tensioned CLT shear wall buildings with buckling-restrained axial fuses.\n \n \n \n \n\n\n \n Zhu, H.; Bezabeh, M. A.; Iqbal, A.; Popovski, M.; and Chen, Z.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 51(7): 784 - 802. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242916707460 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic performance assessment of post-tensioned CLT shear wall buildings with buckling-restrained axial fuses},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Zhu, Huanru and Bezabeh, Matiyas A. and Iqbal, Asif and Popovski, Marjan and Chen, Zhiyong},\nvolume = {51},\nnumber = {7},\nyear = {2024},\npages = {784 - 802},\nissn = {03151468},\nabstract = {<div data-language="eng" data-ev-field="abstract">Post-tensioned cross-laminated timber (PT-CLT) walls have been demonstrated to be a low-damage seismic force-resisting system (SFRS) due to their self-centering capability. However, there is still a need to examine the seismic performance of such SFRS in high-seismic risk zones. This study evaluates the seismic performance of 6-, 9-, and 12-storey PT-CLT shear wall buildings in Vancouver, Canada, equipped with buckling-restrained axial fuses. The prototype buildings were designed using the displacement-based design method, and the assessment considered the most recent seismic hazard model provided in the 2020 National Building Code of Canada. To conduct nonlinear response history analysis (NLRHA) and incremental dynamic analysis (IDA), numerical models were developed in OpenSeesPy and calibrated based on component-and system-level experimental tests. The NLRHA and IDA results demonstrate that all the studied buildings have adequate collapse margin ratios, with less than a 10% chance of collapsing at the maximum considered earthquakes.<br/></div> © 2024 The Author(s).},\nkey = {Shear walls},\n%keywords = {Buckling;Laminating;Seismic design;Seismic waves;Seismology;Timber;},\n%note = {Buckling-restrained;Buckling-restrained axial fuse;Cross laminated;Displacement-based designs;Incremental dynamic analysis;Laminated timber;NBCC 2020;Post tensioned;Post-tensioned cross-laminated timber wall;Seismic forces;},\nURL = {http://dx.doi.org/10.1139/cjce-2023-0448},\n} \n\n\n
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Post-tensioned cross-laminated timber (PT-CLT) walls have been demonstrated to be a low-damage seismic force-resisting system (SFRS) due to their self-centering capability. However, there is still a need to examine the seismic performance of such SFRS in high-seismic risk zones. This study evaluates the seismic performance of 6-, 9-, and 12-storey PT-CLT shear wall buildings in Vancouver, Canada, equipped with buckling-restrained axial fuses. The prototype buildings were designed using the displacement-based design method, and the assessment considered the most recent seismic hazard model provided in the 2020 National Building Code of Canada. To conduct nonlinear response history analysis (NLRHA) and incremental dynamic analysis (IDA), numerical models were developed in OpenSeesPy and calibrated based on component-and system-level experimental tests. The NLRHA and IDA results demonstrate that all the studied buildings have adequate collapse margin ratios, with less than a 10% chance of collapsing at the maximum considered earthquakes.
© 2024 The Author(s).\n
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\n \n\n \n \n \n \n \n \n A new analytical wind turbine wake model considering the effects of coriolis force and yawed conditions.\n \n \n \n \n\n\n \n Snaiki, R.; and Makki, S.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 250. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242116111279 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A new analytical wind turbine wake model considering the effects of coriolis force and yawed conditions},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Snaiki, Reda and Makki, Seyedali},\nvolume = {250},\nyear = {2024},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">Wind turbine wakes significantly affect power production and impose higher loads on downstream turbines. Therefore, the development of accurate and efficient wake models is important for optimizing wind farm layouts and predicting wind turbine performance. This study introduces a novel analytical wake model for yawed wind turbines that incorporates the effects of the Coriolis force. The wake deflection in the far wake region is derived through the application of the principles of mass and momentum conservation. In the near wake, the deflection is assumed to be linear with distance. A Gaussian distribution is assumed for the velocity deficit within the wind turbine wake. Two approaches have been proposed to estimate the onset of the far wake region. While the first approach employs a simplified empirical formula, the second approach utilizes an iteration-based method. The proposed analytical wake model has been validated against computational fluid dynamics (CFD) results. Subsequently, the effects of several important parameters on the wake deflection have been systematically investigated. Overall, the simulation results showed a satisfactory agreement between the CFD results and those obtained from the proposed model. Furthermore, the study concluded that the Coriolis force can exert significant effects on wake deflection, particularly in the far wake region, confirming previous findings from numerical simulations. Due to its simplicity and computational efficiency, the proposed model can be readily used in several applications, including wind farm layout optimization, control and risk assessment.<br/></div> © 2024 The Authors},\nkey = {Wakes},\n%keywords = {Analytical models;Computational efficiency;Computational fluid dynamics;Coriolis force;Deflection (structures);Electric utilities;Iterative methods;Risk assessment;Wind power;Wind turbines;},\n%note = {Condition;Down-stream;Far wakes;High load;Power production;Wake deflection;Wake model;Wake region;Wind turbines wakes;Yawed condition;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2024.105767},\n} \n\n\n
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Wind turbine wakes significantly affect power production and impose higher loads on downstream turbines. Therefore, the development of accurate and efficient wake models is important for optimizing wind farm layouts and predicting wind turbine performance. This study introduces a novel analytical wake model for yawed wind turbines that incorporates the effects of the Coriolis force. The wake deflection in the far wake region is derived through the application of the principles of mass and momentum conservation. In the near wake, the deflection is assumed to be linear with distance. A Gaussian distribution is assumed for the velocity deficit within the wind turbine wake. Two approaches have been proposed to estimate the onset of the far wake region. While the first approach employs a simplified empirical formula, the second approach utilizes an iteration-based method. The proposed analytical wake model has been validated against computational fluid dynamics (CFD) results. Subsequently, the effects of several important parameters on the wake deflection have been systematically investigated. Overall, the simulation results showed a satisfactory agreement between the CFD results and those obtained from the proposed model. Furthermore, the study concluded that the Coriolis force can exert significant effects on wake deflection, particularly in the far wake region, confirming previous findings from numerical simulations. Due to its simplicity and computational efficiency, the proposed model can be readily used in several applications, including wind farm layout optimization, control and risk assessment.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Urban microclimate prediction based on weather station data and artificial neural network.\n \n \n \n \n\n\n \n Yang, S.; Zhan, D.; Stathopoulos, T.; Zou, J.; Shu, C.; and Wang, L. L.\n\n\n \n\n\n\n Energy and Buildings, 314. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"UrbanPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242116121756 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Urban microclimate prediction based on weather station data and artificial neural network},\njournal = {Energy and Buildings},\nauthor = {Yang, Senwen and Zhan, Dongxue and Stathopoulos, Theodore and Zou, Jiwei and Shu, Chang and Wang, Liangzhu Leon},\nvolume = {314},\nyear = {2024},\nissn = {03787788},\nabstract = {<div data-language="eng" data-ev-field="abstract">Urban microclimate has a significant impact on building energy consumption. Building energy modeling (BEM) requires accurate local weather conditions near a target building, whereas Typical Meteorological Year (TMY) weather inputs often use remote airport weather data. An artificial neural network (ANN) model is presented in this study to predict urban microclimates based on long-term measurements from local weather stations near urban buildings and their significance in analyzing building energy consumption. By utilizing only a few months of data, the ANN model could connect local and remote meteorological parameters for a whole year. The 20-year historical weather data at the airport was then used to generate a local TMY. Based on the original and local TMYs, this study compared building heating and cooling loads. This method was evaluated for five weather stations within the city of Montreal to assess the impact of the local microclimate on the energy consumption of buildings. Based on locations, urban microclimate contributed to an additional 2 % to 14 % cooling energy consumption and a reduction of 1 % to 10 % winter heating energy consumption.<br/></div> © 2024 The Author(s)},\nkey = {Neural networks},\n%keywords = {Airports;Atmospheric temperature;Buildings;Energy utilization;Machine learning;Meteorology;Weather information services;},\n%note = {Artificial neural network modeling;Building energy consumption;Field measurement;Machine-learning;Prediction-based;Typical meteorological year;Urban heat island;Urban microclimate;Weather stations;},\nURL = {http://dx.doi.org/10.1016/j.enbuild.2024.114283},\n} \n\n\n
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Urban microclimate has a significant impact on building energy consumption. Building energy modeling (BEM) requires accurate local weather conditions near a target building, whereas Typical Meteorological Year (TMY) weather inputs often use remote airport weather data. An artificial neural network (ANN) model is presented in this study to predict urban microclimates based on long-term measurements from local weather stations near urban buildings and their significance in analyzing building energy consumption. By utilizing only a few months of data, the ANN model could connect local and remote meteorological parameters for a whole year. The 20-year historical weather data at the airport was then used to generate a local TMY. Based on the original and local TMYs, this study compared building heating and cooling loads. This method was evaluated for five weather stations within the city of Montreal to assess the impact of the local microclimate on the energy consumption of buildings. Based on locations, urban microclimate contributed to an additional 2 % to 14 % cooling energy consumption and a reduction of 1 % to 10 % winter heating energy consumption.
© 2024 The Author(s)\n
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\n \n\n \n \n \n \n \n \n Predicting distribution of aeolian vibration amplitude of undamped overhead transmission lines.\n \n \n \n \n\n\n \n Yang, S.; Chouinard, L.; Langlois, S.; Van Dyke, P.; and Paradis, J.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 250. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"PredictingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242116140499 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Predicting distribution of aeolian vibration amplitude of undamped overhead transmission lines},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Yang, Shaoqi and Chouinard, Luc and Langlois, Sebastien and Van Dyke, Pierre and Paradis, Josee},\nvolume = {250},\nyear = {2024},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">The most widely accepted estimation procedure of the severity of aeolian vibration is by calculating the maximum oscillation amplitudes of the conductor using Energy Balance Principle (EBP). However, the EBP is based on wind tunnel results where only one frequency is excited, while observations and experimental results show that multiple resonant modes are excited simultaneously. Furthermore, the required number of cycles of each amplitude level is not provided by current EBP-based methods. In this paper, vibration data from an experimental undamped ACSR Bersfort test line in Quebec, Canada, is recorded and analyzed. For each record of aeolian vibrations, amplitudes are fitted to a Rayleigh distribution based on the narrow-band assumption. The number of cycles and Rayleigh parameter are then related to wind conditions through a modified Strouhal frequency and EBP methodology. A statistical model is proposed to relate vibration profiles and wind input while considering wind turbulence intensity. The proposed method performs well and gives accurate estimates of both vibration amplitudes and number of cycles for ACSR Bersfort conductor. Physical and statistical theory is provided for each step of the method in order to extend the application of the method to other types of conductors or different line configurations.<br/></div> © 2024 Elsevier Ltd},\nkey = {Wind tunnels},\n%keywords = {Electric power transmission;Overhead lines;Vibration analysis;},\n%note = {Aeolian vibration;Damages accumulation;Energy balance principle;Estimation procedures;Number of cycles;Overhead conductors;Overhead transmission lines;Residual life;Vibration amplitude;Vibration profiles;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2024.105779},\n} \n\n\n
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The most widely accepted estimation procedure of the severity of aeolian vibration is by calculating the maximum oscillation amplitudes of the conductor using Energy Balance Principle (EBP). However, the EBP is based on wind tunnel results where only one frequency is excited, while observations and experimental results show that multiple resonant modes are excited simultaneously. Furthermore, the required number of cycles of each amplitude level is not provided by current EBP-based methods. In this paper, vibration data from an experimental undamped ACSR Bersfort test line in Quebec, Canada, is recorded and analyzed. For each record of aeolian vibrations, amplitudes are fitted to a Rayleigh distribution based on the narrow-band assumption. The number of cycles and Rayleigh parameter are then related to wind conditions through a modified Strouhal frequency and EBP methodology. A statistical model is proposed to relate vibration profiles and wind input while considering wind turbulence intensity. The proposed method performs well and gives accurate estimates of both vibration amplitudes and number of cycles for ACSR Bersfort conductor. Physical and statistical theory is provided for each step of the method in order to extend the application of the method to other types of conductors or different line configurations.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Critical reviews and benchmarking Tunisian clinker and cement with life cycle assessment results.\n \n \n \n \n\n\n \n Cherni, M.; Sebei, A.; Amor, B.; Hssine, N.; and Hajjaji, N.\n\n\n \n\n\n\n Case Studies in Construction Materials, 20. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"CriticalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241715968650 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Critical reviews and benchmarking Tunisian clinker and cement with life cycle assessment results},\njournal = {Case Studies in Construction Materials},\nauthor = {Cherni, Makrem and Sebei, Abdelaziz and Amor, Ben and Hssine, Naziha and Hajjaji, Noureddine},\nvolume = {20},\nyear = {2024},\nissn = {22145095},\nabstract = {<div data-language="eng" data-ev-field="abstract">Clinker and cement production is an energy-intensive and high resource requirement industry with significant environmental impacts, and yet, there is a dearth of environmental research in Tunisia on its Life Cycle Assessment (LCA). Additionally, there is a tendency either to overlook or underestimate the selection of appropriate life cycle impact assessment methods. This study aims to address these issues by conducting a comprehensive LCA of Tunisian cement production with the goal of analyzing and comparing the results using various methods and benchmarking against existing literature. Three different Life Cycle Impact Assessment (LCIA) methods, including IMPACT 2002+, CML (baseline), and ReCiPe Midpoint (2008–2016) (H), were used. These methods were chosen for their different coverage (regional/global) of their impact categories, leading to a more comprehensive comparison of the performance of clinker and cement to the literature. In addition, the similarity with published values demonstrates reliability for LCA results, except ionizing radiation, ozone layer depletion, and respiratory organics in IMPACT 2002+ for clinker, CEM-I, and CEM-II; fresh water aquatic ecotoxicity and marine aquatic ecotoxicity in CML (baseline) for CEM-I; and photochemical oxidant formation: ecosystem quality and human health in ReCiPe for CEM-I. This low variability with the reported values in the literature suggests the capability of using the benchmarking approach as a proxy in a context of lack of data.<br/></div> © 2024 The Authors},\nkey = {Life cycle},\n%keywords = {Aquatic ecosystems;Benchmarking;Cements;Environmental impact;Environmental Protection Agency;Ionizing radiation;Ozone layer;},\n%note = {Aquatic ecotoxicity;Benchmark;Cement production;Clinker;Clinker production;Critical review;Energy;Life cycle assessment;Lifecycle impact assessment;Resource requirements;},\nURL = {http://dx.doi.org/10.1016/j.cscm.2024.e03174},\n} \n\n\n
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Clinker and cement production is an energy-intensive and high resource requirement industry with significant environmental impacts, and yet, there is a dearth of environmental research in Tunisia on its Life Cycle Assessment (LCA). Additionally, there is a tendency either to overlook or underestimate the selection of appropriate life cycle impact assessment methods. This study aims to address these issues by conducting a comprehensive LCA of Tunisian cement production with the goal of analyzing and comparing the results using various methods and benchmarking against existing literature. Three different Life Cycle Impact Assessment (LCIA) methods, including IMPACT 2002+, CML (baseline), and ReCiPe Midpoint (2008–2016) (H), were used. These methods were chosen for their different coverage (regional/global) of their impact categories, leading to a more comprehensive comparison of the performance of clinker and cement to the literature. In addition, the similarity with published values demonstrates reliability for LCA results, except ionizing radiation, ozone layer depletion, and respiratory organics in IMPACT 2002+ for clinker, CEM-I, and CEM-II; fresh water aquatic ecotoxicity and marine aquatic ecotoxicity in CML (baseline) for CEM-I; and photochemical oxidant formation: ecosystem quality and human health in ReCiPe for CEM-I. This low variability with the reported values in the literature suggests the capability of using the benchmarking approach as a proxy in a context of lack of data.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Contribution of 3D Roughness Along Concrete-Rock Interface to the Sliding Stability of Concrete Gravity Dams.\n \n \n \n \n\n\n \n Saichi, T.; and Bouaanani, N.\n\n\n \n\n\n\n Geotechnical and Geological Engineering, 42(5): 3805 - 3827. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ContributionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241215785988 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Contribution of 3D Roughness Along Concrete-Rock Interface to the Sliding Stability of Concrete Gravity Dams},\njournal = {Geotechnical and Geological Engineering},\nauthor = {Saichi, Tarik and Bouaanani, Najib},\nvolume = {42},\nnumber = {5},\nyear = {2024},\npages = {3805 - 3827},\nissn = {09603182},\nabstract = {<div data-language="eng" data-ev-field="abstract">Current engineering practice in dam maintenance and safety evaluation generally neglects the contribution of three-dimensional (3D) roughness along a gravity dam’s base to its sliding stability. This important question is addressed in this article through the development and stability analysis of nonlinear finite element (FE) models of dam-rock foundation systems. These models implement realistic large-scale 3D dam-rock joints based on topographic data extracted from existing dam sites. Detailed analyses of the stability response of the studied dam-rock interfaces are presented in terms of limit friction angles, sliding safety factors, aperture and interface roughness coefficients (IRC). The effects of 3D roughness on the distribution of apertures and shearing stresses are discussed. It is shown that the location of asperities within a dam-rock interface may greatly affect the sliding stability. It is also found that 3D roughness may significantly increase the shear strength of dam-rock joints and that bidimensional (2D) sliding stability analyses may over-estimate the shear strength of natural shear keys. However, the asperities along 3D dam-rock interfaces are found to increase the global shear strength in comparison to 2D stability analyses. Limitations of currently available roughness parameters and shear strength criteria are also discussed.<br/></div> © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.},\nkey = {Concretes},\n%keywords = {Gravity dams;Rocks;Safety factor;Shear strength;Stability;},\n%note = {'current;Concrete gravity dams;Dam-rock joint;LiDAR;Rock interfaces;Rock joint;Rock roughness;Shears strength;Sliding stability;Stability analyze;},\nURL = {http://dx.doi.org/10.1007/s10706-024-02758-9},\n} \n\n\n
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Current engineering practice in dam maintenance and safety evaluation generally neglects the contribution of three-dimensional (3D) roughness along a gravity dam’s base to its sliding stability. This important question is addressed in this article through the development and stability analysis of nonlinear finite element (FE) models of dam-rock foundation systems. These models implement realistic large-scale 3D dam-rock joints based on topographic data extracted from existing dam sites. Detailed analyses of the stability response of the studied dam-rock interfaces are presented in terms of limit friction angles, sliding safety factors, aperture and interface roughness coefficients (IRC). The effects of 3D roughness on the distribution of apertures and shearing stresses are discussed. It is shown that the location of asperities within a dam-rock interface may greatly affect the sliding stability. It is also found that 3D roughness may significantly increase the shear strength of dam-rock joints and that bidimensional (2D) sliding stability analyses may over-estimate the shear strength of natural shear keys. However, the asperities along 3D dam-rock interfaces are found to increase the global shear strength in comparison to 2D stability analyses. Limitations of currently available roughness parameters and shear strength criteria are also discussed.
© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.\n
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\n \n\n \n \n \n \n \n \n LiDAR topo-bathymetry for riverbed elevation assessment: A review of approaches and performance for hydrodynamic modelling of flood plains.\n \n \n \n \n\n\n \n Frizzle, C.; Trudel, M.; Daniel, S.; Pruneau, A.; and Noman, J.\n\n\n \n\n\n\n Earth Surface Processes and Landforms, 49(9): 2585 - 2600. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"LiDARPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241015693778 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {LiDAR topo-bathymetry for riverbed elevation assessment: A review of approaches and performance for hydrodynamic modelling of flood plains},\njournal = {Earth Surface Processes and Landforms},\nauthor = {Frizzle, Catherine and Trudel, Melanie and Daniel, Sylvie and Pruneau, Antoine and Noman, Juzer},\nvolume = {49},\nnumber = {9},\nyear = {2024},\npages = {2585 - 2600},\nissn = {01979337},\nabstract = {<div data-language="eng" data-ev-field="abstract">Topo-bathymetric LiDAR (TBL) can provide a continuous digital elevation model (DEM) for terrestrial and submerged portions of rivers. This very high horizontal spatial resolution and high vertical accuracy data can be promising for flood plain mapping using hydrodynamic models. Despite the increasing number of papers regarding the use of TBL in fluvial environments, its usefulness for flood mapping remains to be demonstrated. This review of real-world experiments focusses on three research questions related to the relevance of TBL in hydrodynamic modelling for flood mapping at local and regional scales: (i) Is the accuracy of TBL sufficient? (ii) What environmental and technical conditions can optimise the quality of acquisition? (iii) Is it possible to predict which rivers would be good candidates for TBL acquisition? With a root mean square error (RMSE) of 0.16 m, results from real-world experiments confirm that TBL provides the required vertical accuracy for hydrodynamic modelling. Our review highlighted that environmental conditions, such as turbidity, overhanging vegetation or riverbed morphology, may prove to be limiting factors in the signal's capacity to reach the riverbed. A few avenues have been identified for considering whether TBL acquisition would be appropriate for a specific river. Thresholds should be determined using geometric or morphological criteria, such as rivers with steep slopes, steep riverbanks, and rivers too narrow or with complex morphologies, to avoid compromising the quality or the extent of the coverage. Based on this review, it appears that TBL acquisition conditions for hydrodynamic modelling for flood mapping should optimise the signal's ability to reach the riverbed. However, further research is needed to determine the percentage of coverage required for the use of TBL as a source of bathymetry in a hydrodynamic model, and whether specific river sections must be covered to ensure model performance for flood mapping.<br/></div> © 2024 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd.},\nkey = {Bathymetry},\n%keywords = {Floods;Geomorphology;Hydrodynamics;Landforms;Mapping;Mean square error;Optical radar;Rivers;Surveying;Uncertainty analysis;},\n%note = {Flood mapping;Flood plains;Hydrodynamic modeling;LiDAR;Real world experiment;Riverbed elevation;Topo;Topo-bathymetry;Uncertainty;Vertical accuracy;},\nURL = {http://dx.doi.org/10.1002/esp.5808},\n} \n\n\n
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Topo-bathymetric LiDAR (TBL) can provide a continuous digital elevation model (DEM) for terrestrial and submerged portions of rivers. This very high horizontal spatial resolution and high vertical accuracy data can be promising for flood plain mapping using hydrodynamic models. Despite the increasing number of papers regarding the use of TBL in fluvial environments, its usefulness for flood mapping remains to be demonstrated. This review of real-world experiments focusses on three research questions related to the relevance of TBL in hydrodynamic modelling for flood mapping at local and regional scales: (i) Is the accuracy of TBL sufficient? (ii) What environmental and technical conditions can optimise the quality of acquisition? (iii) Is it possible to predict which rivers would be good candidates for TBL acquisition? With a root mean square error (RMSE) of 0.16 m, results from real-world experiments confirm that TBL provides the required vertical accuracy for hydrodynamic modelling. Our review highlighted that environmental conditions, such as turbidity, overhanging vegetation or riverbed morphology, may prove to be limiting factors in the signal's capacity to reach the riverbed. A few avenues have been identified for considering whether TBL acquisition would be appropriate for a specific river. Thresholds should be determined using geometric or morphological criteria, such as rivers with steep slopes, steep riverbanks, and rivers too narrow or with complex morphologies, to avoid compromising the quality or the extent of the coverage. Based on this review, it appears that TBL acquisition conditions for hydrodynamic modelling for flood mapping should optimise the signal's ability to reach the riverbed. However, further research is needed to determine the percentage of coverage required for the use of TBL as a source of bathymetry in a hydrodynamic model, and whether specific river sections must be covered to ensure model performance for flood mapping.
© 2024 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Assessing the sustainability of a resilient built environment: Research challenges and opportunities.\n \n \n \n \n\n\n \n Tanguay, X.; and Amor, B.\n\n\n \n\n\n\n Journal of Cleaner Production, 458. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"AssessingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242016087855 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessing the sustainability of a resilient built environment: Research challenges and opportunities},\njournal = {Journal of Cleaner Production},\nauthor = {Tanguay, Xavier and Amor, Ben},\nvolume = {458},\nyear = {2024},\nissn = {09596526},\nabstract = {<div data-language="eng" data-ev-field="abstract">Natural hazards foster the need for resilience in the built environment, but resilient structures must not interfere with sustainability. The potential trade-offs are increasingly being investigated using performance-based assessments combined with life cycle assessments (LCA) to translate probable building or bridge damage into environmental losses. Leveraging 102 publications intersecting sustainability and resilience in the built environment, this review sheds light on the current methodological challenges and opportunities for integrating natural hazard-induced damage with environmental losses in the built environment. The reviewed literature primarily focused on buildings exposed to seismic hazards, deriving their losses using the best-known LCA mode, attributional LCA. Building and bridge frameworks showed notable methodological distinctions, along with a near absence of consideration of the interactions between climate change and natural hazards or structural vulnerabilities. Based on the findings, 22 opportunities for future research were synthesized. Future research should seek to better assess the total life cycle sustainability of resilient structures by exploring advanced modes of LCA, widening the scope of their assessments, and better integrating uncertainty and sensitivity. Achieving a more sustainable and resilient built environment also requires upcoming research to investigate the practicalities of aligning modeling frameworks, tools, data, and case studies. Addressing these research gaps will assist in anticipating how the built environment can be adapted and shaped to positively contribute to a resilient and sustainable future.<br/></div> © 2024 The Authors},\nkey = {Risk assessment},\n%keywords = {Climate change;Damage detection;Economic and social effects;Environmental impact;Hazards;Life cycle;Sustainable development;Uncertainty analysis;},\n%note = {Built environment;Environment research;Infrastructure;Natural hazard;Performance-based assessment;Research challenges;Research opportunities;Resilience;Risks assessments;Trade off;},\nURL = {http://dx.doi.org/10.1016/j.jclepro.2024.142437},\n} \n\n\n
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Natural hazards foster the need for resilience in the built environment, but resilient structures must not interfere with sustainability. The potential trade-offs are increasingly being investigated using performance-based assessments combined with life cycle assessments (LCA) to translate probable building or bridge damage into environmental losses. Leveraging 102 publications intersecting sustainability and resilience in the built environment, this review sheds light on the current methodological challenges and opportunities for integrating natural hazard-induced damage with environmental losses in the built environment. The reviewed literature primarily focused on buildings exposed to seismic hazards, deriving their losses using the best-known LCA mode, attributional LCA. Building and bridge frameworks showed notable methodological distinctions, along with a near absence of consideration of the interactions between climate change and natural hazards or structural vulnerabilities. Based on the findings, 22 opportunities for future research were synthesized. Future research should seek to better assess the total life cycle sustainability of resilient structures by exploring advanced modes of LCA, widening the scope of their assessments, and better integrating uncertainty and sensitivity. Achieving a more sustainable and resilient built environment also requires upcoming research to investigate the practicalities of aligning modeling frameworks, tools, data, and case studies. Addressing these research gaps will assist in anticipating how the built environment can be adapted and shaped to positively contribute to a resilient and sustainable future.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Exploring high-rise preventive ventilation: Experimental investigation of inter-zone air pressurization with tracer gas analysis.\n \n \n \n \n\n\n \n Reda, I.; Ali, E.; Berquist, J.; Shu, C.; Zhang, X.; Aram, M.; Qi, D.; Zhou, L. (.; Wang, L. (.; Stathopoulos, T.; and Athienitis, A.\n\n\n \n\n\n\n Building and Environment, 258. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ExploringPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241916031000 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Exploring high-rise preventive ventilation: Experimental investigation of inter-zone air pressurization with tracer gas analysis},\njournal = {Building and Environment},\nauthor = {Reda, Ibrahim and Ali, Eslam and Berquist, Justin and Shu, Chang and Zhang, Xin and Aram, Monireh and Qi, Dahai and Zhou, Liang (Grace) and Wang, Liangzhu (Leon) and Stathopoulos, Theodore and Athienitis, Andreas},\nvolume = {258},\nyear = {2024},\nissn = {03601323},\nabstract = {<div data-language="eng" data-ev-field="abstract">Over the past four years, five major variants of the SARS-CoV-2 virus have circulated globally, causing seven million deaths. Meanwhile, specific preventative ventilation measures were recommended to minimize exposure to the aerosol infection risk, such as opening doors, and disabling ventilation systems. Given more attention to high-rise buildings, where quite a few outbreaks have been reported, there is a notable lack of reported studies assessing preventive ventilation measures. Therefore, this study focused on practicing several ventilation measures in a 16-story high-rise building located in Montreal, Canada. A variety of inter-zonal tracer measurements, including room-to-floor and inter-floor tests, were carried out considering controlled airflow/pressure across zones. An automated data acquisition system was developed for real-time monitoring of tracer/CO<inf>2</inf> spatial concentrations. Findings show that enabled ventilation with opened doors reduces CO<inf>2</inf> concentrations by up to 82 % in nearby source locations and positively pressurized zones; however, negatively pressurized zones experience a 40 % increase in tracer exposure. With ventilation active, a corridor source leads to a higher risk of tracer exposure (up to 86 %) than the in-room source. Disabled ventilation with closed doors is a recommended ventilation measure, for corridors with infection sources, to minimize tracer transport across zones. Zones with infection sources follow the latter ventilation measure; however, ventilation with open doors offers a conditional ventilation measure if careful airflow is designed particularly at return and exhaust points within the ventilation system. This study has implications for practicing preventative ventilation measures for post-COVID-19 building practices and design considerations.<br/></div> © 2024},\nkey = {Carbon dioxide},\n%keywords = {Air quality;Data acquisition;Doors;Floors;Indoor air pollution;Risk assessment;Tall buildings;Ventilation;Viruses;},\n%note = {Building ventilations;CO2 monitoring;Experimental investigations;High rise;High rise building;Indoor air quality;Inter-zonal air pressurization;Tracer gas;Tracer gas measurement;Ventilation systems;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2024.111566},\n} \n\n\n
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Over the past four years, five major variants of the SARS-CoV-2 virus have circulated globally, causing seven million deaths. Meanwhile, specific preventative ventilation measures were recommended to minimize exposure to the aerosol infection risk, such as opening doors, and disabling ventilation systems. Given more attention to high-rise buildings, where quite a few outbreaks have been reported, there is a notable lack of reported studies assessing preventive ventilation measures. Therefore, this study focused on practicing several ventilation measures in a 16-story high-rise building located in Montreal, Canada. A variety of inter-zonal tracer measurements, including room-to-floor and inter-floor tests, were carried out considering controlled airflow/pressure across zones. An automated data acquisition system was developed for real-time monitoring of tracer/CO2 spatial concentrations. Findings show that enabled ventilation with opened doors reduces CO2 concentrations by up to 82 % in nearby source locations and positively pressurized zones; however, negatively pressurized zones experience a 40 % increase in tracer exposure. With ventilation active, a corridor source leads to a higher risk of tracer exposure (up to 86 %) than the in-room source. Disabled ventilation with closed doors is a recommended ventilation measure, for corridors with infection sources, to minimize tracer transport across zones. Zones with infection sources follow the latter ventilation measure; however, ventilation with open doors offers a conditional ventilation measure if careful airflow is designed particularly at return and exhaust points within the ventilation system. This study has implications for practicing preventative ventilation measures for post-COVID-19 building practices and design considerations.
© 2024\n
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\n \n\n \n \n \n \n \n \n Fatigue life and behaviour of ribbed GFRP reinforced concrete beams.\n \n \n \n \n\n\n \n Nagy, I. E.; Asadian, A.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 309. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"FatiguePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241816011923 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Fatigue life and behaviour of ribbed GFRP reinforced concrete beams},\njournal = {Engineering Structures},\nauthor = {Nagy, Islam Elsayed and Asadian, Alireza and Galal, Khaled},\nvolume = {309},\nyear = {2024},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Despite the growing adoption of glass-fibre reinforced polymer (GFRP) as an alternative to steel reinforcement, there is limited research addressing the fatigue performance of GFRP bars in reinforced concrete structures. Existing literature presents contradictory experimental data and conclusions regarding the fatigue behaviour of GFRP rebars embedded in concrete. This study investigates the fatigue life of ribbed GFRP bars embedded in concrete beams through an experimental program, considering factors such as concrete strength and fatigue stress levels. Additionally, it introduces a testing protocol utilizing a displacement-controlled scheme to conduct fatigue testing, addressing many issues associated with force-controlled fatigue testing. Furthermore, the paper discusses cracking behaviour, deflection, and slippage, providing insights into the interaction between GFRP rebars and concrete under fatigue loading. The results of this study demonstrated that ribbed GFRP bars can withstand 2 million cycles of fatigue loading at a 40% stress ratio. The obtained fatigue life exceeds findings in existing literature, emphasizing the impact of stress ratio and bar surface profile on fatigue performance.<br/></div> © 2024 The Authors},\nkey = {Fatigue testing},\n%keywords = {Bridge decks;Concrete beams and girders;Displacement control;Fiber reinforced plastics;Glass fibers;Reinforced concrete;Steel fibers;Stress analysis;},\n%note = {Deflection;Fatigue performance;Glass fiber-reinforced polymer;Glass fiber-reinforced polymer reinforced concrete;Glass-fiber reinforced polymer bars;Glassfiber reinforced polymers (GFRP);Polymer rebars;Ribbed glass fiber-reinforced polymer;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2024.117989},\n} \n\n\n
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Despite the growing adoption of glass-fibre reinforced polymer (GFRP) as an alternative to steel reinforcement, there is limited research addressing the fatigue performance of GFRP bars in reinforced concrete structures. Existing literature presents contradictory experimental data and conclusions regarding the fatigue behaviour of GFRP rebars embedded in concrete. This study investigates the fatigue life of ribbed GFRP bars embedded in concrete beams through an experimental program, considering factors such as concrete strength and fatigue stress levels. Additionally, it introduces a testing protocol utilizing a displacement-controlled scheme to conduct fatigue testing, addressing many issues associated with force-controlled fatigue testing. Furthermore, the paper discusses cracking behaviour, deflection, and slippage, providing insights into the interaction between GFRP rebars and concrete under fatigue loading. The results of this study demonstrated that ribbed GFRP bars can withstand 2 million cycles of fatigue loading at a 40% stress ratio. The obtained fatigue life exceeds findings in existing literature, emphasizing the impact of stress ratio and bar surface profile on fatigue performance.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Earthquake economic loss assessment of existing concrete shear wall residential buildings in Eastern Canada.\n \n \n \n \n\n\n \n Montazeri, M.; and Abo El Ezz, A.\n\n\n \n\n\n\n Earthquake Engineering and Resilience, 3(2): 289 - 312. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"EarthquakePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242716571370 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Earthquake economic loss assessment of existing concrete shear wall residential buildings in Eastern Canada},\njournal = {Earthquake Engineering and Resilience},\nauthor = {Montazeri, Maryam and Abo El Ezz, Ahmad},\nvolume = {3},\nnumber = {2},\nyear = {2024},\npages = {289 - 312},\nissn = {27705706},\nabstract = {<div data-language="eng" data-ev-field="abstract">Past major earthquakes have demonstrated that a significant proportion of existing residential buildings are vulnerable to seismic hazards, resulting in economic and social losses. The assessment of earthquake-induced losses is crucial for devising strategies aimed at enhancing seismic resilience through mitigation plans and emergency response measures. This study intends to provide an analytical methodology for evaluating economic losses for existing residential concrete shear wall buildings in Eastern Canada seismic zones based on Canadian-compatible seismic capacity parameters. A sampled data set related to residential buildings in Montreal was analyzed and statistical distributions were developed that represent the proportion of buildings in different seismic design code levels and number of stories. Vulnerability analyses were performed, which involved estimating buildings' response under seismic hazard inputs according to the 2020 National Building Code of Canada and conducting loss assessment for structural components, nonstructural displacement-sensitive components, nonstructural acceleration-sensitive components, and contents. The results of vulnerability analyses in terms of loss ratio curves showed that the seismic performance varies between mid-rise and high-rise concrete shear wall buildings with different seismic design code levels, and nonstructural displacement-sensitive components exerted the most significant influence on overall economic losses among building components. In addition, a comparison was conducted between Canadian-compatible economic loss ratio curves and those developed based on the standard seismic capacity parameters in the Hazus technical manual and differences in predicted loss ratios were discussed. The developed loss ratio curves can be integrated into regional scale loss assessment tools for rapid estimation of earthquake-induced economic losses for concrete shear wall buildings as a function of seismic intensity.<br/></div> © 2024 Tianjin University and John Wiley & Sons Australia, Ltd.},\nkey = {Shear walls},\n%keywords = {Acceleration;Concretes;Earthquakes;Hazards;Housing;Losses;Risk assessment;Seismic design;Seismic response;},\n%note = {Capacity spectrum method;Concrete shear wall;Concrete shear wall building;Economic loss;Loss ratio;Non-structural;Seismic design code;Seismic design code level;Seismic risk assessment;Sensitive components;},\nURL = {http://dx.doi.org/10.1002/eer2.84},\n} \n\n\n
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Past major earthquakes have demonstrated that a significant proportion of existing residential buildings are vulnerable to seismic hazards, resulting in economic and social losses. The assessment of earthquake-induced losses is crucial for devising strategies aimed at enhancing seismic resilience through mitigation plans and emergency response measures. This study intends to provide an analytical methodology for evaluating economic losses for existing residential concrete shear wall buildings in Eastern Canada seismic zones based on Canadian-compatible seismic capacity parameters. A sampled data set related to residential buildings in Montreal was analyzed and statistical distributions were developed that represent the proportion of buildings in different seismic design code levels and number of stories. Vulnerability analyses were performed, which involved estimating buildings' response under seismic hazard inputs according to the 2020 National Building Code of Canada and conducting loss assessment for structural components, nonstructural displacement-sensitive components, nonstructural acceleration-sensitive components, and contents. The results of vulnerability analyses in terms of loss ratio curves showed that the seismic performance varies between mid-rise and high-rise concrete shear wall buildings with different seismic design code levels, and nonstructural displacement-sensitive components exerted the most significant influence on overall economic losses among building components. In addition, a comparison was conducted between Canadian-compatible economic loss ratio curves and those developed based on the standard seismic capacity parameters in the Hazus technical manual and differences in predicted loss ratios were discussed. The developed loss ratio curves can be integrated into regional scale loss assessment tools for rapid estimation of earthquake-induced economic losses for concrete shear wall buildings as a function of seismic intensity.
© 2024 Tianjin University and John Wiley & Sons Australia, Ltd.\n
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\n \n\n \n \n \n \n \n \n Experimental investigations of the effects of bending vibrations resonance modes on penetration into granular materials.\n \n \n \n \n\n\n \n Alaei Varnosfaderani, M.; Wu, N.; and Maghoul, P.\n\n\n \n\n\n\n Smart Materials and Structures, 33(6). 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242116125893 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental investigations of the effects of bending vibrations resonance modes on penetration into granular materials},\njournal = {Smart Materials and Structures},\nauthor = {Alaei Varnosfaderani, Mahdi and Wu, Nan and Maghoul, Pooneh},\nvolume = {33},\nnumber = {6},\nyear = {2024},\nissn = {09641726},\nabstract = {<div data-language="eng" data-ev-field="abstract">Inspired by the bending vibration observed in the biological locomotions such as those found in snakes, horned lizards, and sandfish, we have developed a novel vibro probe utilizing bending resonance modes to study the bending vibration effects in assisting penetration into granular materials. This approach contrasts with traditional probes that rely on longitudinal vibrations for penetration. This newly developed probe was used to experimentally investigate the impact of bending vibration in reducing the required penetration force and enhancing the penetration process within granular materials such as lunar or Martian regolith. The bending vibrations were excited by thin piezo patches attached to the probe’s machined surface without increasing the probe’s outside diameter. This simple mechanism enables pushing the whole probe inside the granular materials. Experimental modal analysis was employed to determine the resonance frequencies of the probe. Subsequently, the probe was pushed into granular materials, both with and without the bending vibrations, by a linear actuator. Experimental results indicated that employing bending vibration in one direction led to a reduction in penetration force by up to 27% while utilizing two directions resulted in a reduction of up to 42%. Additionally, when the probe stopped penetrating the soil due to insufficient axial force, bi-directional bending vibration proved more effective in swiftly fluidizing the surrounding soil. These findings highlight the efficacy of bending vibrations in compact subsurface drilling tools.<br/></div> © 2024 The Author(s). Published by IOP Publishing Ltd.},\nkey = {Soils},\n%keywords = {Granular materials;Infill drilling;Linear actuators;Lunar surface analysis;Modal analysis;Natural frequencies;Probes;},\n%note = {% reductions;Bending vibrations;Extraterrestrial bodies;Lateral vibrations;Lunar regolith;Penetration forces;Resonance frequencies;Resonance mode;Soil drilling;Subsurface investigations;},\nURL = {http://dx.doi.org/10.1088/1361-665X/ad4758},\n} \n\n\n
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Inspired by the bending vibration observed in the biological locomotions such as those found in snakes, horned lizards, and sandfish, we have developed a novel vibro probe utilizing bending resonance modes to study the bending vibration effects in assisting penetration into granular materials. This approach contrasts with traditional probes that rely on longitudinal vibrations for penetration. This newly developed probe was used to experimentally investigate the impact of bending vibration in reducing the required penetration force and enhancing the penetration process within granular materials such as lunar or Martian regolith. The bending vibrations were excited by thin piezo patches attached to the probe’s machined surface without increasing the probe’s outside diameter. This simple mechanism enables pushing the whole probe inside the granular materials. Experimental modal analysis was employed to determine the resonance frequencies of the probe. Subsequently, the probe was pushed into granular materials, both with and without the bending vibrations, by a linear actuator. Experimental results indicated that employing bending vibration in one direction led to a reduction in penetration force by up to 27% while utilizing two directions resulted in a reduction of up to 42%. Additionally, when the probe stopped penetrating the soil due to insufficient axial force, bi-directional bending vibration proved more effective in swiftly fluidizing the surrounding soil. These findings highlight the efficacy of bending vibrations in compact subsurface drilling tools.
© 2024 The Author(s). Published by IOP Publishing Ltd.\n
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\n \n\n \n \n \n \n \n \n Environmental performance of eco-design strategies applied to the building sector.\n \n \n \n \n\n\n \n Ipsen, K. L.; Pizzol, M.; Birkved, M.; and Amor, B.\n\n\n \n\n\n\n Journal of Industrial Ecology, 28(3): 556 - 572. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"EnvironmentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241615928270 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Environmental performance of eco-design strategies applied to the building sector},\njournal = {Journal of Industrial Ecology},\nauthor = {Ipsen, Kikki Lambrecht and Pizzol, Massimo and Birkved, Morten and Amor, Ben},\nvolume = {28},\nnumber = {3},\nyear = {2024},\npages = {556 - 572},\nissn = {10881980},\nabstract = {<div data-language="eng" data-ev-field="abstract">The application of eco-design principles in the building sector is considered a promising way to mitigate its substantial environmental impacts. However, quantitative evidence for this mitigation potential is lacking. The objective of this study was to quantify the environmental performance of diverse eco-design strategies when applied to the building sector. A macroscale model capable of simulating the future demand for housing and related material flows within the urban building stock was developed based on an existing building stock model. These material flows were used to build inventories for a consequential life cycle assessment and, in turn, to quantify the potential environmental consequences of introducing eco-design strategies in the building sector, assessed across 16 impact categories. Model outputs have a high level of uncertainty but are still useful for decision-making, given the model's simplicity and transparency. The main results show that impact reductions can be obtained from specific uses of wood and wooden products, for example, when used for the walls in high-rise buildings, whereas using hempcrete for partition walls increases the impact. Although the use of adaptability or disassembly strategies can reduce impacts, this pay-off can only be obtained after a long period of implementation. In summary, the present study provides new quantitative insights into the ability of eco-design strategies to mitigate environmental impacts in the building sector.<br/></div> © 2024 The Authors. Journal of Industrial Ecology published by Wiley Periodicals LLC on behalf of International Society for Industrial Ecology.},\nkey = {Ecodesign},\n%keywords = {Architectural design;Decision making;Environmental impact;Environmental management;Life cycle;Structural design;Tall buildings;Urban growth;Walls (structural partitions);},\n%note = {Bio-based materials;Buildings sector;Design strategies;Direct reuse;Industrial ecology;Reuse;Shared socioeconomic pathway;Socio-economics;Time dependency;Urban development;},\nURL = {http://dx.doi.org/10.1111/jiec.13465},\n} \n\n\n
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The application of eco-design principles in the building sector is considered a promising way to mitigate its substantial environmental impacts. However, quantitative evidence for this mitigation potential is lacking. The objective of this study was to quantify the environmental performance of diverse eco-design strategies when applied to the building sector. A macroscale model capable of simulating the future demand for housing and related material flows within the urban building stock was developed based on an existing building stock model. These material flows were used to build inventories for a consequential life cycle assessment and, in turn, to quantify the potential environmental consequences of introducing eco-design strategies in the building sector, assessed across 16 impact categories. Model outputs have a high level of uncertainty but are still useful for decision-making, given the model's simplicity and transparency. The main results show that impact reductions can be obtained from specific uses of wood and wooden products, for example, when used for the walls in high-rise buildings, whereas using hempcrete for partition walls increases the impact. Although the use of adaptability or disassembly strategies can reduce impacts, this pay-off can only be obtained after a long period of implementation. In summary, the present study provides new quantitative insights into the ability of eco-design strategies to mitigate environmental impacts in the building sector.
© 2024 The Authors. Journal of Industrial Ecology published by Wiley Periodicals LLC on behalf of International Society for Industrial Ecology.\n
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\n \n\n \n \n \n \n \n \n Theoretical investigation of the structural performance of multi–span reinforced concrete beams strengthened with FRCM systems.\n \n \n \n \n\n\n \n Mandor, A.; and El Refai, A.\n\n\n \n\n\n\n Engineering Structures, 308. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"TheoreticalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241615942351 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Theoretical investigation of the structural performance of multi–span reinforced concrete beams strengthened with FRCM systems},\njournal = {Engineering Structures},\nauthor = {Mandor, Ahmed and El Refai, Ahmed},\nvolume = {308},\nyear = {2024},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Few studies have reported on the flexural behavior of multi–span reinforced concrete (RC) structures strengthened using externally–bonded (EB) systems such as fiber–reinforced polymer (FRP) and fiber–reinforced cementitious matrix (FRCM) systems. This paper introduces a theoretical model that can accurately predict the flexural behavior of such structures with a focus on their rotational capacity (curvature) and their moment redistribution response between critical sections. Unlike the available models, the proposed model accounts for the variation in the structure's stiffness during loading including that of the strengthened section. The model can precisely determine the failure mode, the rotational capacity of the formed plastic hinges and estimate the moment redistribution ratio (MRR) between the critical sections at any applied load. The efficiency of the model was validated against the experimental results of eleven FRCM–strengthened two–span RC beams (including two control beams) previously tested by the authors. A good agreement between the experimental and the theoretical results was obtained with average experimental–to–theoretical ratios of 1.0 and 0.99 for the load carrying–capacity and MRR, respectively. To accurately determine the mid–span deflections of continuous EB–strengthened structures, a new reduction parameter was incorporated in the CSA–A23.3–19 (2019) formulations to account for the variation in stiffness of the strengthened section. The new formulations substantially enhanced the prediction of the deflection capacity of the strengthened structures with an average experimental–to–theoretical ratio of 1.02 versus 1.7 when CSA formulations were used.<br/></div> © 2024 The Authors},\nkey = {Stiffness},\n%keywords = {Concrete beams and girders;Ductile fracture;Fiber reinforced plastics;Reinforced concrete;Stiffness matrix;},\n%note = {Cementitious matrices;Continuous beams;Fabric reinforced cementitious matrix;Fiber-reinforced polymers;Fibre reinforced polymers;Fibre-reinforced;Moment redistribution;Plastic hinges;Rotational capacity;Seismic, deflection;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2024.117994},\n} \n\n\n
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Few studies have reported on the flexural behavior of multi–span reinforced concrete (RC) structures strengthened using externally–bonded (EB) systems such as fiber–reinforced polymer (FRP) and fiber–reinforced cementitious matrix (FRCM) systems. This paper introduces a theoretical model that can accurately predict the flexural behavior of such structures with a focus on their rotational capacity (curvature) and their moment redistribution response between critical sections. Unlike the available models, the proposed model accounts for the variation in the structure's stiffness during loading including that of the strengthened section. The model can precisely determine the failure mode, the rotational capacity of the formed plastic hinges and estimate the moment redistribution ratio (MRR) between the critical sections at any applied load. The efficiency of the model was validated against the experimental results of eleven FRCM–strengthened two–span RC beams (including two control beams) previously tested by the authors. A good agreement between the experimental and the theoretical results was obtained with average experimental–to–theoretical ratios of 1.0 and 0.99 for the load carrying–capacity and MRR, respectively. To accurately determine the mid–span deflections of continuous EB–strengthened structures, a new reduction parameter was incorporated in the CSA–A23.3–19 (2019) formulations to account for the variation in stiffness of the strengthened section. The new formulations substantially enhanced the prediction of the deflection capacity of the strengthened structures with an average experimental–to–theoretical ratio of 1.02 versus 1.7 when CSA formulations were used.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Impact of heat islands vs. city greening: Real-time monitoring and modeling of drinking water temperature in the city of Montreal in Canada.\n \n \n \n \n\n\n \n Absalan, F.; Hatam, F.; Blokker, M.; Besner, M.; Prevost, M.; and Bichai, F.\n\n\n \n\n\n\n Water Research, 256. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241515909993 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact of heat islands vs. city greening: Real-time monitoring and modeling of drinking water temperature in the city of Montreal in Canada},\njournal = {Water Research},\nauthor = {Absalan, Faezeh and Hatam, Fatemeh and Blokker, Mirjam and Besner, Marie-Claude and Prevost, Michele and Bichai, Francoise},\nvolume = {256},\nyear = {2024},\nissn = {00431354},\nabstract = {<div data-language="eng" data-ev-field="abstract">Urbanization increases the land surface temperature through surface mineralization, adversely affecting vegetation and enhancing the urban heat island (UHI) effect. Global climate change has intensified this warming effect with more frequent and intense heatwaves during hot seasons. While these transformations influence soil temperature, their consequences on drinking water temperature within the drinking water distribution system (DWDS) remains poorly understood. Literature proposes to increase pipe burial depths to mitigate drinking water heating during summer. In this study, we monitored drinking water temperatures in a DWDS in Montreal, Canada with deeply buried pipes (average 1.8 m) during the summer of 2022, focusing on two contrasting zones in terms of UHI and green coverage. Monitoring revealed a 8°C heating effect compared to the water treatment plant, attributed to low green coverage and anthropogenic heat. Conversely, the greener zone exhibited cooler drinking water temperatures, reaching a maximum cooling effect of 8°C as compared to the temperature at the exit of the water treatment plant. Utilizing a soil and water temperature model, we predicted drinking water temperatures within the DWDS with acceptable accuracy. Soil temperature modeling results aligned well with measured water temperatures, highlighting DWDS water temperature approaching its surrounding soil temperature fairly quickly. Despite heatwaves, no immediate correlation emerged between air temperature records and measured water temperatures, emphasizing soil temperature as a superior indicator. An increase in water age displayed no correlation with an increase in measured water temperature, underscoring the dominant influence of UHI and green coverage on water temperature. These findings highlight the cooling advantages of green spaces during summer, providing valuable insights for sustainable urban planning.<br/></div> © 2024},\nkey = {Water temperature},\n%keywords = {Atmospheric temperature;Global warming;Landforms;Potable water;Soil temperature;Soils;Urban planning;Water distribution systems;Water treatment;Water treatment plants;},\n%note = {Drinking water distribution system;Heat island;Heatwaves;Soil temperature;Temperature modeling;Urban greening;Urban heat island;Water distribution networks;Water temperature modeling;Water temperatures;},\nURL = {http://dx.doi.org/10.1016/j.watres.2024.121490},\n} \n\n\n
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Urbanization increases the land surface temperature through surface mineralization, adversely affecting vegetation and enhancing the urban heat island (UHI) effect. Global climate change has intensified this warming effect with more frequent and intense heatwaves during hot seasons. While these transformations influence soil temperature, their consequences on drinking water temperature within the drinking water distribution system (DWDS) remains poorly understood. Literature proposes to increase pipe burial depths to mitigate drinking water heating during summer. In this study, we monitored drinking water temperatures in a DWDS in Montreal, Canada with deeply buried pipes (average 1.8 m) during the summer of 2022, focusing on two contrasting zones in terms of UHI and green coverage. Monitoring revealed a 8°C heating effect compared to the water treatment plant, attributed to low green coverage and anthropogenic heat. Conversely, the greener zone exhibited cooler drinking water temperatures, reaching a maximum cooling effect of 8°C as compared to the temperature at the exit of the water treatment plant. Utilizing a soil and water temperature model, we predicted drinking water temperatures within the DWDS with acceptable accuracy. Soil temperature modeling results aligned well with measured water temperatures, highlighting DWDS water temperature approaching its surrounding soil temperature fairly quickly. Despite heatwaves, no immediate correlation emerged between air temperature records and measured water temperatures, emphasizing soil temperature as a superior indicator. An increase in water age displayed no correlation with an increase in measured water temperature, underscoring the dominant influence of UHI and green coverage on water temperature. These findings highlight the cooling advantages of green spaces during summer, providing valuable insights for sustainable urban planning.
© 2024\n
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\n \n\n \n \n \n \n \n \n Türkiye Mw 7.7 Pazarcık and Mw 7.6 Elbistan earthquakes of February 6th, 2023: Contribution of valley effects on damage pattern.\n \n \n \n \n\n\n \n Karray, M.; Karakan, E.; Kincal, C.; Chiaradonna, A.; Gul, T. O.; Lanzo, G.; Monaco, P.; and Sezer, A.\n\n\n \n\n\n\n Soil Dynamics and Earthquake Engineering, 181. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"TürkiyePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241515907724 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Türkiye Mw 7.7 Pazarcık and Mw 7.6 Elbistan earthquakes of February 6th, 2023: Contribution of valley effects on damage pattern},\njournal = {Soil Dynamics and Earthquake Engineering},\nauthor = {Karray, Mourad and Karakan, Eyyub and Kincal, Cem and Chiaradonna, Anna and Gul, Tolga Oktay and Lanzo, Giuseppe and Monaco, Paola and Sezer, Alper},\nvolume = {181},\nyear = {2024},\nissn = {02677261},\nabstract = {<div data-language="eng" data-ev-field="abstract">On February 6<sup>th</sup>, 2023, southeastern Türkiye was shaken by two catastrophic earthquakes, close to northwestern Syrian border. The first earthquake (Pazarcık) occurred 45 km west of Gaziantep at 1:17:32 (UTC), with a shallow strike-slip faulting at a depth of approximately 8.6 km and a moment magnitude (M<inf>W</inf>) of around 7.7. The second event (Elbistan) took place 9 h later, 66 km north-east of Kahramanmaraş city center, also with shallow strike-slip faulting at a depth approximately 7 km and an M<inf>W</inf> of around 7.6. Turkish authorities reported a death toll of over 59,000 in Türkiye and about 8500 in Syria. The destructive effect of the earthquake resulted from widespread strong ground shaking, a rupture length exceeding 300 km, causing collapse of a large number of buildings. The catastrophic destruction of the built environment was accompanied by a range of other earthquake-related effects, including fault ruptures, landslides, and soil liquefaction. The aim of the study is to analyze the distribution of ground motion and their relationships with the observed damages for the two events. Spectral accelerations of key importance were assessed across a large area in the southeastern part of Türkiye. Notably, these accelerations were generally much higher than existing design spectra. A significant correlation between the observed concentration of damage and the significant amplification of motion induced by local soil conditions (such as soft soils and valley effects). The distinct tectonic structure of the region could be the main reason for the high amplification in the valleys (associated with basin effects), even at large distances from the epicenter, especially in correspondence with the bidimensional graben-type geological structures. The investigation delved into the analysis of four specific regions in detail: Antakya and Hassa (both in the Hatay province), Kahramanmaraş and Göksun. Notably, the observable valley effects were found to play a significant role and could account for the significant damage observed in these regions.<br/></div> © 2024 Elsevier Ltd},\nkey = {Soils},\n%keywords = {Earthquake effects;Fault slips;Landforms;Soil liquefaction;Strike-slip faults;},\n%note = {Catastrophic earthquake;City centers;Damage distribution;Elbistan;February 6th, 2023 turkiye earthquake;Ground-motion;Moment magnitudes;Pazarcık;Strike slip faulting;Valley effect;},\nURL = {http://dx.doi.org/10.1016/j.soildyn.2024.108634},\n} \n\n\n
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On February 6th, 2023, southeastern Türkiye was shaken by two catastrophic earthquakes, close to northwestern Syrian border. The first earthquake (Pazarcık) occurred 45 km west of Gaziantep at 1:17:32 (UTC), with a shallow strike-slip faulting at a depth of approximately 8.6 km and a moment magnitude (MW) of around 7.7. The second event (Elbistan) took place 9 h later, 66 km north-east of Kahramanmaraş city center, also with shallow strike-slip faulting at a depth approximately 7 km and an MW of around 7.6. Turkish authorities reported a death toll of over 59,000 in Türkiye and about 8500 in Syria. The destructive effect of the earthquake resulted from widespread strong ground shaking, a rupture length exceeding 300 km, causing collapse of a large number of buildings. The catastrophic destruction of the built environment was accompanied by a range of other earthquake-related effects, including fault ruptures, landslides, and soil liquefaction. The aim of the study is to analyze the distribution of ground motion and their relationships with the observed damages for the two events. Spectral accelerations of key importance were assessed across a large area in the southeastern part of Türkiye. Notably, these accelerations were generally much higher than existing design spectra. A significant correlation between the observed concentration of damage and the significant amplification of motion induced by local soil conditions (such as soft soils and valley effects). The distinct tectonic structure of the region could be the main reason for the high amplification in the valleys (associated with basin effects), even at large distances from the epicenter, especially in correspondence with the bidimensional graben-type geological structures. The investigation delved into the analysis of four specific regions in detail: Antakya and Hassa (both in the Hatay province), Kahramanmaraş and Göksun. Notably, the observable valley effects were found to play a significant role and could account for the significant damage observed in these regions.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Future flood envelope curves for the estimation of design flood magnitudes for highway bridges at river crossings.\n \n \n \n \n\n\n \n Maria, D.; Sushama, L.; Almansour, H.; Khaliq, M. N.; Nguyen, V.; and Chouinard, L.\n\n\n \n\n\n\n Results in Engineering, 22. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"FuturePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241315823768 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Future flood envelope curves for the estimation of design flood magnitudes for highway bridges at river crossings},\njournal = {Results in Engineering},\nauthor = {Maria, Dona and Sushama, Laxmi and Almansour, Husham and Khaliq, Muhammad Naveed and Nguyen, Van-Thanh-Van and Chouinard, Luc},\nvolume = {22},\nyear = {2024},\nissn = {25901230},\nabstract = {<div data-language="eng" data-ev-field="abstract">Creager flood envelope curves, which serve as the upper bound/limit of observed extreme flows, are commonly used by practitioners to estimate design flood magnitudes, which in the case of most river-crossing highway bridges is 75-year flood magnitude in Canada. This study proposes a novel framework for climate change adaption of Creager curves for estimating future design floods. These curves, for the current period, are assessed considering 417 observation stations, located in seven major Canadian river basins (i.e., Fraser, Nelson, Mackenzie, Yukon, Churchill, St Lawrence and St John). The Creager coefficient C, which defines flood envelope curves, varies between 1 and 45 across the studied river basins. To adapt Creager curves for future changes in streamflow, a correction factor, R<inf>C</inf>, which is the ratio of future to current period C values, is proposed. These factors are obtained for observation sites, using streamflow data from an ensemble of Regional Climate Model (RCM) simulations for current and future periods, through two Regional Frequency Analysis approaches. The first approach, considering only the RCM cells where the stations are located, suggests R<inf>C</inf> in the 0.3–1.6 range, with southeasterly basins showing values < 1. The second approach, considering all RCM cells for a given region, yields a wider range for R<inf>C</inf> and adds useful information in that R<inf>C</inf> values can also be established at ungauged locations. From a practical viewpoint, the proposed framework for estimating future design floods is robust and transferrable to other basins, but can benefit using streamflow projections from other models for better uncertainty quantification.<br/></div> © 2024 The Authors},\nkey = {Climate change},\n%keywords = {Climate models;Flood control;Floods;Frequency estimation;Highway bridges;Rivers;Stream flow;Uncertainty analysis;Watersheds;},\n%note = {'current;Creager curve;Design flood;Envelope curve;Flood magnitudes;Future designs;Regional climate;Regional climate modeling;Regional flood frequency analysis;River crossings;},\nURL = {http://dx.doi.org/10.1016/j.rineng.2024.102038},\n} \n\n\n
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Creager flood envelope curves, which serve as the upper bound/limit of observed extreme flows, are commonly used by practitioners to estimate design flood magnitudes, which in the case of most river-crossing highway bridges is 75-year flood magnitude in Canada. This study proposes a novel framework for climate change adaption of Creager curves for estimating future design floods. These curves, for the current period, are assessed considering 417 observation stations, located in seven major Canadian river basins (i.e., Fraser, Nelson, Mackenzie, Yukon, Churchill, St Lawrence and St John). The Creager coefficient C, which defines flood envelope curves, varies between 1 and 45 across the studied river basins. To adapt Creager curves for future changes in streamflow, a correction factor, RC, which is the ratio of future to current period C values, is proposed. These factors are obtained for observation sites, using streamflow data from an ensemble of Regional Climate Model (RCM) simulations for current and future periods, through two Regional Frequency Analysis approaches. The first approach, considering only the RCM cells where the stations are located, suggests RC in the 0.3–1.6 range, with southeasterly basins showing values < 1. The second approach, considering all RCM cells for a given region, yields a wider range for RC and adds useful information in that RC values can also be established at ungauged locations. From a practical viewpoint, the proposed framework for estimating future design floods is robust and transferrable to other basins, but can benefit using streamflow projections from other models for better uncertainty quantification.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n A novel hybrid machine learning model for rapid assessment of wave and storm surge responses over an extended coastal region.\n \n \n \n \n\n\n \n Saviz Naeini, S.; and Snaiki, R.\n\n\n \n\n\n\n Coastal Engineering, 190. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241215759063 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A novel hybrid machine learning model for rapid assessment of wave and storm surge responses over an extended coastal region},\njournal = {Coastal Engineering},\nauthor = {Saviz Naeini, Saeed and Snaiki, Reda},\nvolume = {190},\nyear = {2024},\nissn = {03783839},\nabstract = {<div data-language="eng" data-ev-field="abstract">Storm surge and waves are responsible for a substantial portion of tropical and extratropical cyclones-related damages. While high-fidelity numerical models have significantly advanced the simulation accuracy of storm surge and waves, they are not practical to be employed for probabilistic analysis, risk assessment or rapid prediction due to their high computational demands. In this study, a novel hybrid model combining dimensionality reduction and data-driven techniques is developed for rapid assessment of waves and storm surge responses over an extended coastal region. Specifically, the hybrid model simultaneously identifies a low-dimensional representation of the high-dimensional spatial system based on a deep autoencoder (DAE) while mapping the storm parameters to the obtained low-dimensional latent space using a deep neural network (DNN). To train the hybrid model, a combined weighted loss function is designed to encourage a balance between DAE and DNN training and achieve the best accuracy. The performance of the hybrid model is evaluated through a case study using the synthetic data from the North Atlantic Comprehensive Coastal Study (NACCS) covering critical regions within New York and New Jersey. In addition, the proposed approach is compared with two decoupled models where the regression model is based on DNN and the reduction techniques are either principal component analysis (PCA) or DAE which are trained separately from the DNN model. High accuracy and computational efficiency are observed for the hybrid model which could be readily implemented as part of early warning systems or probabilistic risk assessment of waves and storm surge.<br/></div> © 2024 The Authors},\nkey = {Risk assessment},\n%keywords = {Computational efficiency;Deep neural networks;Floods;Hurricanes;Learning systems;Principal component analysis;Regression analysis;Risk analysis;Storms;},\n%note = {Auto encoders;Coastal regions;Deep autoencoder;Deep learning;Hybrid machine learning;Hybrid model;Rapid assessment;Significant wave height;Storm surges;Storm waves;},\nURL = {http://dx.doi.org/10.1016/j.coastaleng.2024.104503},\n} \n\n\n
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Storm surge and waves are responsible for a substantial portion of tropical and extratropical cyclones-related damages. While high-fidelity numerical models have significantly advanced the simulation accuracy of storm surge and waves, they are not practical to be employed for probabilistic analysis, risk assessment or rapid prediction due to their high computational demands. In this study, a novel hybrid model combining dimensionality reduction and data-driven techniques is developed for rapid assessment of waves and storm surge responses over an extended coastal region. Specifically, the hybrid model simultaneously identifies a low-dimensional representation of the high-dimensional spatial system based on a deep autoencoder (DAE) while mapping the storm parameters to the obtained low-dimensional latent space using a deep neural network (DNN). To train the hybrid model, a combined weighted loss function is designed to encourage a balance between DAE and DNN training and achieve the best accuracy. The performance of the hybrid model is evaluated through a case study using the synthetic data from the North Atlantic Comprehensive Coastal Study (NACCS) covering critical regions within New York and New Jersey. In addition, the proposed approach is compared with two decoupled models where the regression model is based on DNN and the reduction techniques are either principal component analysis (PCA) or DAE which are trained separately from the DNN model. High accuracy and computational efficiency are observed for the hybrid model which could be readily implemented as part of early warning systems or probabilistic risk assessment of waves and storm surge.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Towards Education 4.0 in Geotechnical Engineering Using a Virtual Reality/Augmented Reality Visualization Platform.\n \n \n \n \n\n\n \n Afsharipour, M.; and Maghoul, P.\n\n\n \n\n\n\n Geotechnical and Geological Engineering, 42(4): 2657 - 2673. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"TowardsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20235215266867 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Towards Education 4.0 in Geotechnical Engineering Using a Virtual Reality/Augmented Reality Visualization Platform},\njournal = {Geotechnical and Geological Engineering},\nauthor = {Afsharipour, Mohammadhossein and Maghoul, Pooneh},\nvolume = {42},\nnumber = {4},\nyear = {2024},\npages = {2657 - 2673},\nissn = {09603182},\nabstract = {<div data-language="eng" data-ev-field="abstract">Education 4.0 can play a significant role in the future of geotechnical engineering education. It can provide personalized and equitable learning experiences and be used to develop skills for the fourth industrial revolution in geotechnical engineering. In this paper, we explore the application of Augmented Reality (AR) and Virtual Reality (VR) models, as part of Education 4.0, to enhance the presentation and communication of soil mechanics concepts. A detailed step-by-step process for creating 3D representations of geotechnical concepts, including texturing, UV mapping, animation, and export and publishing techniques, is introduced. For this purpose, two powerful 3D modeling and animation software programs, Autodesk Maya and Blender, are employed to develop geotechnical avatars in a soil mechanics laboratory. In Autodesk Maya, a detailed representation of the soil phase diagram is presented, while Blender is utilized to create a Consolidated Undrained (CU) triaxial laboratory experiment. The geotechnical testing avatars are then uploaded to Sketchfab, a popular publishing website that supports AR/VR formats. We also explore the potential for establishing a virtual laboratory for geotechnical engineering, highlighting the transformative possibilities it offers in terms of practical learning experiences and educational accessibility.<br/></div> © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2023.},\nkey = {Augmented reality},\n%keywords = {3D modeling;Animation;Blending;E-learning;Engineering education;Geotechnical engineering;Learning systems;Soil mechanics;Soils;Three dimensional computer graphics;Virtual reality;Visualization;},\n%note = {3D models;3d-modeling;Autodesk mayas;Education 4.0;Geotechnical;Immersive learning;Interactive learning;Learning experiences;Reality visualization;Visualization platforms;},\nURL = {http://dx.doi.org/10.1007/s10706-023-02697-x},\n} \n\n\n
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Education 4.0 can play a significant role in the future of geotechnical engineering education. It can provide personalized and equitable learning experiences and be used to develop skills for the fourth industrial revolution in geotechnical engineering. In this paper, we explore the application of Augmented Reality (AR) and Virtual Reality (VR) models, as part of Education 4.0, to enhance the presentation and communication of soil mechanics concepts. A detailed step-by-step process for creating 3D representations of geotechnical concepts, including texturing, UV mapping, animation, and export and publishing techniques, is introduced. For this purpose, two powerful 3D modeling and animation software programs, Autodesk Maya and Blender, are employed to develop geotechnical avatars in a soil mechanics laboratory. In Autodesk Maya, a detailed representation of the soil phase diagram is presented, while Blender is utilized to create a Consolidated Undrained (CU) triaxial laboratory experiment. The geotechnical testing avatars are then uploaded to Sketchfab, a popular publishing website that supports AR/VR formats. We also explore the potential for establishing a virtual laboratory for geotechnical engineering, highlighting the transformative possibilities it offers in terms of practical learning experiences and educational accessibility.
© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2023.\n
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\n \n\n \n \n \n \n \n \n Decision making for road infrastructures in a network based on a policy gradient method.\n \n \n \n \n\n\n \n Sasai, K.; Chouinard, L. E.; Power, G. J.; Conciatori, D.; and Zufferey, N.\n\n\n \n\n\n\n Infrastructure Asset Management, 11(3): 161 - 171. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"DecisionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242116135534 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Decision making for road infrastructures in a network based on a policy gradient method},\njournal = {Infrastructure Asset Management},\nauthor = {Sasai, Kotaro and Chouinard, Luc E. and Power, Gabriel J. and Conciatori, David and Zufferey, Nicolas},\nvolume = {11},\nnumber = {3},\nyear = {2024},\npages = {161 - 171},\nissn = {20530242},\nabstract = {<div data-language="eng" data-ev-field="abstract">Developing proper maintenance and rehabilitation investment plans is vital for prolonging the service life of road infrastructures while preserving the required service level under capital constraints. This paper proposes a reinforcement learning approach for determining an optimal policy of selecting maintenance, repair and rehabilitation alternatives for a network of road infrastructure facilities. The proposed approach is based on a policy gradient method and overcomes the computational complexity of optimisation problems due to a large number of possible combinations of network conditions and maintenance, repair and rehabilitation alternatives. The developed optimal management policy takes into consideration interdependencies among infrastructure facilities in a road network. Numerical studies on concrete bridge decks in road networks are performed to demonstrate the advantage, feasibility and capability of the proposed approach.<br/></div> © 2024 Emerald Publishing Limited: All rights reserved.},\nkey = {Decision making},\n%keywords = {Gradient methods;Highway planning;Investments;Reinforcement learning;Repair;Roads and streets;},\n%note = {Decisions makings;Investment plan;Maintenance and rehabilitations;Maintenance repairs;Network-based;Policy gradient methods;Rehabilitation alternatives;Repair and rehabilitations;Road infrastructures;Road network;},\nURL = {http://dx.doi.org/10.1680/jinam.23.00045},\n} \n\n\n
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Developing proper maintenance and rehabilitation investment plans is vital for prolonging the service life of road infrastructures while preserving the required service level under capital constraints. This paper proposes a reinforcement learning approach for determining an optimal policy of selecting maintenance, repair and rehabilitation alternatives for a network of road infrastructure facilities. The proposed approach is based on a policy gradient method and overcomes the computational complexity of optimisation problems due to a large number of possible combinations of network conditions and maintenance, repair and rehabilitation alternatives. The developed optimal management policy takes into consideration interdependencies among infrastructure facilities in a road network. Numerical studies on concrete bridge decks in road networks are performed to demonstrate the advantage, feasibility and capability of the proposed approach.
© 2024 Emerald Publishing Limited: All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Accounting for traffic disturbance in road infrastructure management: Optimal maintenance and rehabilitation planning for the society.\n \n \n \n \n\n\n \n Sasai, K.; Chouinard, L. E.; Power, G. J.; Conciatori, D.; and Zufferey, N.\n\n\n \n\n\n\n Transportation Research Part A: Policy and Practice, 183. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"AccountingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241515889051 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Accounting for traffic disturbance in road infrastructure management: Optimal maintenance and rehabilitation planning for the society},\njournal = {Transportation Research Part A: Policy and Practice},\nauthor = {Sasai, Kotaro and Chouinard, Luc E. and Power, Gabriel J. and Conciatori, David and Zufferey, Nicolas},\nvolume = {183},\nyear = {2024},\nissn = {09658564},\nabstract = {<div data-language="eng" data-ev-field="abstract">Maintaining a high level of network performance at minimal cost is a central objective for road infrastructure management. Going beyond agency costs, decisions must consider the economic and environmental impacts of maintenance and repairs strategies due to traffic delays on commuters and providers of goods and services. A dynamic programming model is presented to determine optimal management policies for current and proposed paradigms by selecting the best maintenance and rehabilitation activities at each time step over the time horizon given the concomitant and predicted states of the bridges within the network as well as predicted future origin-destination flows. The empirical analysis is demonstrated for a small network of three viaducts in an urban environment in Montréal, Canada. The incremental user costs due to interventions on the structures of the network are obtained through traffic simulations based on trip-survey data to evaluate travel delays for all possible combinations of concomitant partial or complete road closures. The results show that optimal infrastructure management strategies in space and time differ substantially depending on whether only agency costs are used, or if policies also reflect socio-economic goals (including sustainability). The main findings indicate that by including user costs in decision processes, significant reductions in user costs are achieved with minimal impact on operator costs, thus easily satisfying a cost/benefit criterion. The findings provide new evidence for policymakers that the optimal sequencing of interventions in time and space on a network can significantly reduce societal costs, sustainability objectives and environmental impacts.<br/></div> © 2024 Elsevier Ltd},\nkey = {Markov processes},\n%keywords = {Cost reduction;Dynamic programming;Environmental impact;Highway administration;Highway planning;Maintenance;Roads and streets;Sustainable development;},\n%note = {Agency costs;Infrastructure managements;Maintenance and rehabilitations;Management policy;Markov Decision Processes;Optimal maintenance;Optimal management;Optimal management policy;Road infrastructures;User cost;},\nURL = {http://dx.doi.org/10.1016/j.tra.2024.104040},\n} \n\n\n
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Maintaining a high level of network performance at minimal cost is a central objective for road infrastructure management. Going beyond agency costs, decisions must consider the economic and environmental impacts of maintenance and repairs strategies due to traffic delays on commuters and providers of goods and services. A dynamic programming model is presented to determine optimal management policies for current and proposed paradigms by selecting the best maintenance and rehabilitation activities at each time step over the time horizon given the concomitant and predicted states of the bridges within the network as well as predicted future origin-destination flows. The empirical analysis is demonstrated for a small network of three viaducts in an urban environment in Montréal, Canada. The incremental user costs due to interventions on the structures of the network are obtained through traffic simulations based on trip-survey data to evaluate travel delays for all possible combinations of concomitant partial or complete road closures. The results show that optimal infrastructure management strategies in space and time differ substantially depending on whether only agency costs are used, or if policies also reflect socio-economic goals (including sustainability). The main findings indicate that by including user costs in decision processes, significant reductions in user costs are achieved with minimal impact on operator costs, thus easily satisfying a cost/benefit criterion. The findings provide new evidence for policymakers that the optimal sequencing of interventions in time and space on a network can significantly reduce societal costs, sustainability objectives and environmental impacts.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Seismic fragility and vulnerability assessment of a multi-span irregular curved bridge under spatially varying ground motions.\n \n \n \n \n\n\n \n Song, S.; Xie, Y.; Wang, Y.; Zhang, W.; Kurtulus, A.; Apaydin, N. M.; and Taciroglu, E.\n\n\n \n\n\n\n Soil Dynamics and Earthquake Engineering, 180. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241315800110 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic fragility and vulnerability assessment of a multi-span irregular curved bridge under spatially varying ground motions},\njournal = {Soil Dynamics and Earthquake Engineering},\nauthor = {Song, Sirui and Xie, Yazhou and Wang, Yifan and Zhang, Wenyang and Kurtulus, Asli and Apaydin, Nurdan Memisoglu and Taciroglu, Ertugrul},\nvolume = {180},\nyear = {2024},\nissn = {02677261},\nabstract = {<div data-language="eng" data-ev-field="abstract">Multi-span reinforced concrete (RC) curved box-girder bridges are commonly designed to facilitate traffic flow at highway interchanges. The Aksemsettin Viaduct (henceforth, A Viaduct for brevity) in Istanbul, Turkey, is an eleven-span interchange bridge with a total length of 596.8 m. Located in a high seismicity zone, the A Viaduct is designed with a curved deck, multiple bearings that have different isolation mechanisms at different bents and directions, ten rectangular columns with unequal heights, and a mix of pile foundations and spread footings. The significant length of the viaduct crossed by eleven spans also makes it susceptible to varying ground motion excitations at different foundations. To evaluate the effects of the degree of modeling detail and analysis complexity on the estimated seismic performance, the present study conducts a comprehensive fragility assessment of the specimen viaduct under various ground motion excitation schemes. First, a three-dimensional finite element model is developed with detailed simulations for the deck, columns, bearings, foundations, and abutment components. To enable different ground motion excitations at each foundation, 57 sets of spatially varying ground motions are simulated by considering the realistic surface topography and soil stratigraphy at the bridge site. Cyclic pushover analyses are performed along multiple loading directions to develop the direction-dependent capacity limit state models for hollow rectangular columns. Subsequently, a demand-capacity ratio method is utilized to develop reliable fragility models for bridge columns. Component- and system-level fragilities of the A Viaduct are then assessed under uniform versus multi-support excitations, vertical motions, and ground motions with varying incidence angles. To further capture the seismic damage discrepancies of the same components at different locations, seismic repair cost ratios of the A Viaduct are assessed when subjected to uniform and multi-support excitations. This study highlights the significance of considering multi-support excitations to achieve more realistic seismic fragility and loss estimates for multi-span long curved highway bridges.<br/></div> © 2024 The Authors},\nkey = {Highway bridges},\n%keywords = {Beams and girders;Damage detection;Pile foundations;Piles;Reinforced concrete;Stratigraphy;Topography;},\n%note = {Capacity directionality of rectangular column;Ground motion incidence;Ground-motion;Multi-span curved highway bridge;Multi-spans;Multi-support excitation;Seismic fragility;Seismic fragility and loss assessment;Seismic loss;Vertical motions;},\nURL = {http://dx.doi.org/10.1016/j.soildyn.2024.108585},\n} \n\n\n
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Multi-span reinforced concrete (RC) curved box-girder bridges are commonly designed to facilitate traffic flow at highway interchanges. The Aksemsettin Viaduct (henceforth, A Viaduct for brevity) in Istanbul, Turkey, is an eleven-span interchange bridge with a total length of 596.8 m. Located in a high seismicity zone, the A Viaduct is designed with a curved deck, multiple bearings that have different isolation mechanisms at different bents and directions, ten rectangular columns with unequal heights, and a mix of pile foundations and spread footings. The significant length of the viaduct crossed by eleven spans also makes it susceptible to varying ground motion excitations at different foundations. To evaluate the effects of the degree of modeling detail and analysis complexity on the estimated seismic performance, the present study conducts a comprehensive fragility assessment of the specimen viaduct under various ground motion excitation schemes. First, a three-dimensional finite element model is developed with detailed simulations for the deck, columns, bearings, foundations, and abutment components. To enable different ground motion excitations at each foundation, 57 sets of spatially varying ground motions are simulated by considering the realistic surface topography and soil stratigraphy at the bridge site. Cyclic pushover analyses are performed along multiple loading directions to develop the direction-dependent capacity limit state models for hollow rectangular columns. Subsequently, a demand-capacity ratio method is utilized to develop reliable fragility models for bridge columns. Component- and system-level fragilities of the A Viaduct are then assessed under uniform versus multi-support excitations, vertical motions, and ground motions with varying incidence angles. To further capture the seismic damage discrepancies of the same components at different locations, seismic repair cost ratios of the A Viaduct are assessed when subjected to uniform and multi-support excitations. This study highlights the significance of considering multi-support excitations to achieve more realistic seismic fragility and loss estimates for multi-span long curved highway bridges.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Two- and three-dimensional multiphase mesh-free particle modeling of transitional landslide with μ(I) rheology.\n \n \n \n \n\n\n \n Jafari Nodoushan, E.; Tajnesaie, M.; and Shakibaeinia, A.\n\n\n \n\n\n\n International Journal for Numerical Methods in Fluids, 96(5): 823 - 850. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"Two-Paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240815586474 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Two- and three-dimensional multiphase mesh-free particle modeling of transitional landslide with μ(I) rheology},\njournal = {International Journal for Numerical Methods in Fluids},\nauthor = {Jafari Nodoushan, Ehsan and Tajnesaie, Mohanna and Shakibaeinia, Ahmad},\nvolume = {96},\nnumber = {5},\nyear = {2024},\npages = {823 - 850},\nissn = {02712091},\nabstract = {<div data-language="eng" data-ev-field="abstract">Landslides, which are the sources of most catastrophic natural disasters, can be subaerial (dry), submerged (underwater), or semi-submerged (transitional). Semi-submerged or transitional landslides occur when a subaerial landslide enters water and turns to submerged condition. Predicting the behavior of such a highly dynamic multi-phase granular flow system is challenging, mainly due to the water entry effects, such as wave impact and partial saturation (and resulted cohesion). The mesh-free particle methods, such as the moving particle semi-implicit (MPS) method, have proven their capabilities for the simulation of the highly dynamic multiphase systems. This study develops and evaluates a numerical model, based on the MPS particle method in combination with the μ(I) rheological model, to simulate the morphodynamic of the granular mass in semi-submerged landslides in two and three dimensions. An algorithm is developed to consider partial saturation (and resulting cohesion) during the water entry. Comparing the numerical results with the experimental measurements shows the ability of the proposed model to accurately reproduce the morphological evolution of the granular mass, especially at the moment of water entry.<br/></div> © 2024 John Wiley & Sons Ltd.},\nkey = {Landslides},\n%keywords = {3D modeling;Disasters;Elasticity;Granular materials;Mesh generation;Numerical methods;},\n%note = {2-D model;3D models;3d-modeling;Moving particle semi-implicit;Moving particle semiimplicit method;Moving-particle semi-implicit (WC-moving particle semi-implicit) method;Moving-particle semi-implicit methods;Semi-submerged landslide;Water entry;Μ(I) rheology model;},\nURL = {http://dx.doi.org/10.1002/fld.5274},\n} \n\n\n
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Landslides, which are the sources of most catastrophic natural disasters, can be subaerial (dry), submerged (underwater), or semi-submerged (transitional). Semi-submerged or transitional landslides occur when a subaerial landslide enters water and turns to submerged condition. Predicting the behavior of such a highly dynamic multi-phase granular flow system is challenging, mainly due to the water entry effects, such as wave impact and partial saturation (and resulted cohesion). The mesh-free particle methods, such as the moving particle semi-implicit (MPS) method, have proven their capabilities for the simulation of the highly dynamic multiphase systems. This study develops and evaluates a numerical model, based on the MPS particle method in combination with the μ(I) rheological model, to simulate the morphodynamic of the granular mass in semi-submerged landslides in two and three dimensions. An algorithm is developed to consider partial saturation (and resulting cohesion) during the water entry. Comparing the numerical results with the experimental measurements shows the ability of the proposed model to accurately reproduce the morphological evolution of the granular mass, especially at the moment of water entry.
© 2024 John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Seismic risk assessment of highway bridges in western Canada under crustal, subcrustal, and subduction earthquakes.\n \n \n \n \n\n\n \n Shao, Y.; and Xie, Y.\n\n\n \n\n\n\n Structural Safety, 108. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240515477261 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic risk assessment of highway bridges in western Canada under crustal, subcrustal, and subduction earthquakes},\njournal = {Structural Safety},\nauthor = {Shao, Yihan and Xie, Yazhou},\nvolume = {108},\nyear = {2024},\nissn = {01674730},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study conducts seismic risk assessment of highway bridges in western Canada. The performance-based earthquake engineering (PBEE) framework is enhanced to assess the expected annual repair cost ratio (ARCR) and annual restoration time (ART) of a benchmark bridge class under the region's three types of earthquakes - shallow crustal earthquakes (CEs), deep subcrustal earthquakes (SCEs), and megathrust Cascadia subduction earthquakes (CSEs). First, event-specific seismic hazard models are considered, whereas event-consistent ground motions are selected for non-linear time history analyses. Compared with those from CEs and SCEs, CSE ground motions feature a much longer duration. This long-duration effect is captured by validating the numerical model of the bridge column against (1) a cyclic pushover test under standard versus long-duration loading protocols and (2) a shaking table test excited by six consecutive ground motions. Besides, the Park and Ang damage index is utilized as the column's engineering demand parameter (EDP) and updated as a demand-capacity ratio model when reaching four different damage states. A comprehensive list of ground motion intensity measures (IMs) is considered where the spectra acceleration at one second, S<inf>a</inf>(1.0), is chosen as the most suitable IM based on its performance in proficiency, efficiency, practicality, and EDP-IM correlation across all three earthquake events. Subsequently, component- and system-level fragility models are derived under each earthquake type using the cloud analysis that convolves the seismic demands with capacity models for multiple bridge components. To further quantify and propagate the epistemic uncertainty associated with the development of probabilistic seismic demand models (PSDMs), the bootstrap resampling technique is utilized to generate numerous seismic demand datasets and develop a stochastic set of seismic fragility curves. Finally, the bootstrapped, event-dependent fragility models are combined with the respective hazard models and probabilistic loss functions to assess the expected ARCR and ART for the benchmark bridge class. This study underscores the significantly higher seismic risk of highway bridges when facing CSEs, followed by CEs and SCEs.<br/></div> © 2024 The Author(s)},\nkey = {Stochastic systems},\n%keywords = {Acceleration;Benchmarking;Cost benefit analysis;Cost engineering;Damage detection;Earthquake effects;Earthquake engineering;Hazards;Highway bridges;Restoration;Risk assessment;Stochastic models;Uncertainty analysis;},\n%note = {Annual repair cost ratio;Annual restoration time;Cascadia;Cloud analysis;Cost ratio;Crustal earthquakes;Repair costs;Restoration time;Seismic risk assessment;Subduction earthquakes;},\nURL = {http://dx.doi.org/10.1016/j.strusafe.2024.102441},\n} \n\n\n
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This study conducts seismic risk assessment of highway bridges in western Canada. The performance-based earthquake engineering (PBEE) framework is enhanced to assess the expected annual repair cost ratio (ARCR) and annual restoration time (ART) of a benchmark bridge class under the region's three types of earthquakes - shallow crustal earthquakes (CEs), deep subcrustal earthquakes (SCEs), and megathrust Cascadia subduction earthquakes (CSEs). First, event-specific seismic hazard models are considered, whereas event-consistent ground motions are selected for non-linear time history analyses. Compared with those from CEs and SCEs, CSE ground motions feature a much longer duration. This long-duration effect is captured by validating the numerical model of the bridge column against (1) a cyclic pushover test under standard versus long-duration loading protocols and (2) a shaking table test excited by six consecutive ground motions. Besides, the Park and Ang damage index is utilized as the column's engineering demand parameter (EDP) and updated as a demand-capacity ratio model when reaching four different damage states. A comprehensive list of ground motion intensity measures (IMs) is considered where the spectra acceleration at one second, Sa(1.0), is chosen as the most suitable IM based on its performance in proficiency, efficiency, practicality, and EDP-IM correlation across all three earthquake events. Subsequently, component- and system-level fragility models are derived under each earthquake type using the cloud analysis that convolves the seismic demands with capacity models for multiple bridge components. To further quantify and propagate the epistemic uncertainty associated with the development of probabilistic seismic demand models (PSDMs), the bootstrap resampling technique is utilized to generate numerous seismic demand datasets and develop a stochastic set of seismic fragility curves. Finally, the bootstrapped, event-dependent fragility models are combined with the respective hazard models and probabilistic loss functions to assess the expected ARCR and ART for the benchmark bridge class. This study underscores the significantly higher seismic risk of highway bridges when facing CSEs, followed by CEs and SCEs.
© 2024 The Author(s)\n
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\n \n\n \n \n \n \n \n \n Estimating and reducing dissipative losses in thermal spray: A parametrized material flow analysis approach.\n \n \n \n \n\n\n \n Kaddoura, M.; Majeau-Bettez, G.; Amor, B.; Poirier, D.; and Margni, M.\n\n\n \n\n\n\n Journal of Cleaner Production, 450. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"EstimatingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241415833767 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Estimating and reducing dissipative losses in thermal spray: A parametrized material flow analysis approach},\njournal = {Journal of Cleaner Production},\nauthor = {Kaddoura, Mohamad and Majeau-Bettez, Guillaume and Amor, Ben and Poirier, Dominique and Margni, Manuele},\nvolume = {450},\nyear = {2024},\nissn = {09596526},\nabstract = {<div data-language="eng" data-ev-field="abstract">Thermal spray is a family of surface engineering technologies necessary to meet technical functionalities of components under harsh environmental conditions. Those technologies come at the expense of dissipative losses of coating materials throughout the life cycle of components. Measuring these material losses has so far retained little attention in the field. This research provides a framework to estimate material dissipative losses in surface engineering applications based on specific parameters, mainly deposition efficiencies. We applied material flow analysis to quantify dissipative losses for the main metals used in thermal spray (Cr, Co, Mo, Ni, Si, W, Y and Zr). Results show that the coating process is the most contributing life cycle stage (up to 39% of the losses). Improving the deposition efficiency, recovering the unadhered and stripping the components at their end-of-life are key material efficiency strategies to reduce the material losses (up to 50%).<br/></div> © 2024 Elsevier Ltd},\nkey = {Efficiency},\n%keywords = {Coatings;Environmental technology;Life cycle;Thermal Engineering;},\n%note = {Analysis approach;Circular economy;Deposition efficiencies;Dissipative loss;Material efficiency;Material loss;Materials flow analysis;Surface engineering;Technical functionalities;Thermalspray;},\nURL = {http://dx.doi.org/10.1016/j.jclepro.2024.141978},\n} \n\n\n
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Thermal spray is a family of surface engineering technologies necessary to meet technical functionalities of components under harsh environmental conditions. Those technologies come at the expense of dissipative losses of coating materials throughout the life cycle of components. Measuring these material losses has so far retained little attention in the field. This research provides a framework to estimate material dissipative losses in surface engineering applications based on specific parameters, mainly deposition efficiencies. We applied material flow analysis to quantify dissipative losses for the main metals used in thermal spray (Cr, Co, Mo, Ni, Si, W, Y and Zr). Results show that the coating process is the most contributing life cycle stage (up to 39% of the losses). Improving the deposition efficiency, recovering the unadhered and stripping the components at their end-of-life are key material efficiency strategies to reduce the material losses (up to 50%).
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Asset management-based resilience index formulation for pavements via principal components analysis.\n \n \n \n \n\n\n \n Mohammed, A.; Zayed, T.; Nasiri, F.; and Bagchi, A.\n\n\n \n\n\n\n Construction Innovation, 24(3): 830 - 845. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"AssetPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20225113260601 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Asset management-based resilience index formulation for pavements via principal components analysis},\njournal = {Construction Innovation},\nauthor = {Mohammed, Ahmed and Zayed, Tarek and Nasiri, Fuzhan and Bagchi, Ashutosh},\nvolume = {24},\nnumber = {3},\nyear = {2024},\npages = {830 - 845},\nissn = {14714175},\nabstract = {<div data-language="eng" data-ev-field="abstract">Purpose: This paper extends the authors’ previous research work investigating resilience for municipal infrastructure from an asset management perspective. Therefore, this paper aims to formulate a pavement resilience index while incorporating asset management and the associated resilience indicators from the authors’ previous research work. Design/methodology/approach: This paper introduces a set of holistic-based key indicators that reflect municipal infrastructure resiliency. Thenceforth, the indicators were integrated using the weighted sum mean method to form the proposed resilience index. Resilience indicators weights were determined using principal components analysis (PCA) via IBM SPSS®. The developed framework for the PCA was built based on an optimization model output to generate the required weights for the desired resilience index. The output optimization data were adjusted using the standardization method before performing PCA. Findings: This paper offers a mathematical approach to generating a resilience index for municipal infrastructure. The statistical tests conducted throughout the study showed a high significance level. Therefore, using PCA was proper for the resilience indicators data. The proposed framework is beneficial for asset management experts, where introducing the proposed index will provide ease of use to decision-makers regarding pavement network maintenance planning. Research limitations/implications: The resilience indicators used need to be updated beyond what is mentioned in this paper to include asset redundancy and structural asset capacity. Using clustering as a validation tool is an excellent opportunity for other researchers to examine the resilience index for each pavement corridor individually pertaining to the resulting clusters. Originality/value: This paper provides a unique example of integrating resilience and asset management concepts and serves as a vital step toward a comprehensive integration approach between the two concepts. The used PCA framework offers dynamic resilience indicators weights and, therefore, a dynamic resilience index. Resiliency is a dynamic feature for infrastructure systems. It differs during their life cycle with the change in maintenance and rehabilitation plans, systems retrofit and the occurring disruptive events throughout their life cycle. Therefore, the PCA technique was the preferred method used where it is data-based oriented and eliminates the subjectivity while driving indicators weights.<br/></div> © 2022, Emerald Publishing Limited.},\nkey = {Asset management},\n%keywords = {Decision making;Life cycle;Pavements;Principal component analysis;Uncertainty analysis;},\n%note = {Assets management;Design/methodology/approach;Key indicator;Municipal infrastructure;Optimization models;Pavement resilience index;Principal-component analysis;Resilience assessment;Resilience index;Weighted Sum;},\nURL = {http://dx.doi.org/10.1108/CI-04-2022-0083},\n} \n\n\n
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Purpose: This paper extends the authors’ previous research work investigating resilience for municipal infrastructure from an asset management perspective. Therefore, this paper aims to formulate a pavement resilience index while incorporating asset management and the associated resilience indicators from the authors’ previous research work. Design/methodology/approach: This paper introduces a set of holistic-based key indicators that reflect municipal infrastructure resiliency. Thenceforth, the indicators were integrated using the weighted sum mean method to form the proposed resilience index. Resilience indicators weights were determined using principal components analysis (PCA) via IBM SPSS®. The developed framework for the PCA was built based on an optimization model output to generate the required weights for the desired resilience index. The output optimization data were adjusted using the standardization method before performing PCA. Findings: This paper offers a mathematical approach to generating a resilience index for municipal infrastructure. The statistical tests conducted throughout the study showed a high significance level. Therefore, using PCA was proper for the resilience indicators data. The proposed framework is beneficial for asset management experts, where introducing the proposed index will provide ease of use to decision-makers regarding pavement network maintenance planning. Research limitations/implications: The resilience indicators used need to be updated beyond what is mentioned in this paper to include asset redundancy and structural asset capacity. Using clustering as a validation tool is an excellent opportunity for other researchers to examine the resilience index for each pavement corridor individually pertaining to the resulting clusters. Originality/value: This paper provides a unique example of integrating resilience and asset management concepts and serves as a vital step toward a comprehensive integration approach between the two concepts. The used PCA framework offers dynamic resilience indicators weights and, therefore, a dynamic resilience index. Resiliency is a dynamic feature for infrastructure systems. It differs during their life cycle with the change in maintenance and rehabilitation plans, systems retrofit and the occurring disruptive events throughout their life cycle. Therefore, the PCA technique was the preferred method used where it is data-based oriented and eliminates the subjectivity while driving indicators weights.
© 2022, Emerald Publishing Limited.\n
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\n \n\n \n \n \n \n \n \n Impact of upstream fetch on environmental wind engineering applications.\n \n \n \n \n\n\n \n Yu, J.; Stathopoulos, T.; and Li, M.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 247. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241215789320 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact of upstream fetch on environmental wind engineering applications},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Yu, Jianhan and Stathopoulos, Ted and Li, Mingshui},\nvolume = {247},\nyear = {2024},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">With the rapid urbanization process, there is a growing concern regarding the wind environment in suburban and urban regions. The purpose of this study is to investigate the influence of the upstream fetch length on environmental wind engineering issues, such as the pedestrian level wind (PLW) and the wind comfort assessment around newly built buildings. The suburban region of Westmount in Montreal and the urban area of Kowloon in Hong Kong are selected for case studies. The investigation has been experimental and results were obtained from two atmospheric boundary layer wind tunnels. The results indicate that the upstream fetch length that influences the PLW estimation in suburban areas is as short as 200 m and in urban areas is as short as 450 m. For the wind comfort assessment of a newly building, an upstream fetch length of 100 m from the building site can be utilized depending on the criteria used.<br/></div> © 2024 Elsevier Ltd},\nkey = {Computational fluid dynamics},\n%keywords = {Atmospheric boundary layer;Urban growth;Wind tunnels;},\n%note = {Computational fluid dynamic;Engineering applications;Environmental wind engineering;Fetch length;Pedestrian level wind;Rapid urbanization process;Upstream fetch;Urban areas;Wind comfort assessment;Wind engineering;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2024.105704},\n} \n\n\n
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With the rapid urbanization process, there is a growing concern regarding the wind environment in suburban and urban regions. The purpose of this study is to investigate the influence of the upstream fetch length on environmental wind engineering issues, such as the pedestrian level wind (PLW) and the wind comfort assessment around newly built buildings. The suburban region of Westmount in Montreal and the urban area of Kowloon in Hong Kong are selected for case studies. The investigation has been experimental and results were obtained from two atmospheric boundary layer wind tunnels. The results indicate that the upstream fetch length that influences the PLW estimation in suburban areas is as short as 200 m and in urban areas is as short as 450 m. For the wind comfort assessment of a newly building, an upstream fetch length of 100 m from the building site can be utilized depending on the criteria used.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Discontinuum models for the structural and seismic assessment of unreinforced masonry structures: a critical appraisal.\n \n \n \n \n\n\n \n Malomo, D.; and Pulatsu, B.\n\n\n \n\n\n\n Structures, 62. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"DiscontinuumPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241115722045 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Discontinuum models for the structural and seismic assessment of unreinforced masonry structures: a critical appraisal},\njournal = {Structures},\nauthor = {Malomo, D. and Pulatsu, B.},\nvolume = {62},\nyear = {2024},\nissn = {23520124},\nabstract = {<div data-language="eng" data-ev-field="abstract">In the last few decades, discontinuum (or discrete, discontinuous) numerical modelling strategies – i.e. those capable of representing the motion of multiple, intersecting discontinuities explicitly – have become increasingly popular for the structural and seismic assessment of unreinforced masonry (URM) structures. The automatic recognition of new contact points and prediction of large deformations up to complete separation are unique features of discontinuum-based models, making them particularly suitable for unit-by-unit simulations. The adaptation of discrete computational models, primarily used for analyzing rock mechanics and geomechanics problems, to the conservation, structural and earthquake engineering evaluation of URM assemblies is still ongoing, and recent advances in computer-aided technologies are accelerating significantly their adoption. Researchers have now developed fracture energy-based contact models tailored to unreinforced masonry mechanics, explored discontinuum analysis from the mortar joint- to the 3D building-level, combined discrete modelling strategies with analytical or continuum approaches, integrated the latest structural health monitoring and image-based developments into discontinuum-based analysis framework. Concurrently, new and still unsolved issues have also arisen, including the selection of appropriate damping schemes, degree of idealization and discretization strategies, identification of appropriate lab or onsite tests to infer meaningful equivalent mechanical input parameters. This paper offers to the research and industry communities an updated critical appraisal and practical guidelines on the use of discontinuum-based structural and seismic assessment strategies for URM structures, providing opportunities to uncover future key research paths. First, masonry mechanics and discontinuum-based idealization options are discussed by considering micro-, meso- and macro-scale modelling strategies. Pragmatic suggestions are provided to select appropriate input parameters essential to model masonry composite and its constituents at different scales. Then, discontinuum approaches are classified based on their formulation, focusing on the Distinct Element Method (DEM), Applied Element Method (AEM) and Non-Smooth Contact Dynamics (NSCD), and an overview of primary differences, capabilities, pros and cons are thoroughly discussed. Finally, previous discontinuum-based analyses of URM small-scale specimens, isolated planar or curved components, assemblies or complex structures are critically reviewed and compared in terms of adopted strategies and relevant outcomes. This paper presents to new and experienced analysts an in-depth summary of what modern discontinuum-based tools can provide to the structural and earthquake engineering fields, practical guidelines on implementing robust and meaningful modelling strategies at various scales, and potential future research directions.<br/></div> © 2024 The Authors},\nkey = {Numerical models},\n%keywords = {Computation theory;Earthquake engineering;Industrial research;Masonry materials;Numerical methods;Rock mechanics;Seismology;Structural health monitoring;},\n%note = {Applied element method;Computational modelling;Discontinuum;Discontinuum analysis;Discrete elements method;Distinct element methods;Element method;Non-smooth contact dynamics;Seismic analysis;Unreinforced masonries (URMs);},\nURL = {http://dx.doi.org/10.1016/j.istruc.2024.106108},\n} \n\n\n
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In the last few decades, discontinuum (or discrete, discontinuous) numerical modelling strategies – i.e. those capable of representing the motion of multiple, intersecting discontinuities explicitly – have become increasingly popular for the structural and seismic assessment of unreinforced masonry (URM) structures. The automatic recognition of new contact points and prediction of large deformations up to complete separation are unique features of discontinuum-based models, making them particularly suitable for unit-by-unit simulations. The adaptation of discrete computational models, primarily used for analyzing rock mechanics and geomechanics problems, to the conservation, structural and earthquake engineering evaluation of URM assemblies is still ongoing, and recent advances in computer-aided technologies are accelerating significantly their adoption. Researchers have now developed fracture energy-based contact models tailored to unreinforced masonry mechanics, explored discontinuum analysis from the mortar joint- to the 3D building-level, combined discrete modelling strategies with analytical or continuum approaches, integrated the latest structural health monitoring and image-based developments into discontinuum-based analysis framework. Concurrently, new and still unsolved issues have also arisen, including the selection of appropriate damping schemes, degree of idealization and discretization strategies, identification of appropriate lab or onsite tests to infer meaningful equivalent mechanical input parameters. This paper offers to the research and industry communities an updated critical appraisal and practical guidelines on the use of discontinuum-based structural and seismic assessment strategies for URM structures, providing opportunities to uncover future key research paths. First, masonry mechanics and discontinuum-based idealization options are discussed by considering micro-, meso- and macro-scale modelling strategies. Pragmatic suggestions are provided to select appropriate input parameters essential to model masonry composite and its constituents at different scales. Then, discontinuum approaches are classified based on their formulation, focusing on the Distinct Element Method (DEM), Applied Element Method (AEM) and Non-Smooth Contact Dynamics (NSCD), and an overview of primary differences, capabilities, pros and cons are thoroughly discussed. Finally, previous discontinuum-based analyses of URM small-scale specimens, isolated planar or curved components, assemblies or complex structures are critically reviewed and compared in terms of adopted strategies and relevant outcomes. This paper presents to new and experienced analysts an in-depth summary of what modern discontinuum-based tools can provide to the structural and earthquake engineering fields, practical guidelines on implementing robust and meaningful modelling strategies at various scales, and potential future research directions.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Design of cellular steel beams subjected to lateral torsional buckling.\n \n \n \n \n\n\n \n Boissonnade, N.; Nseir, J.; and Somja, H.\n\n\n \n\n\n\n Thin-Walled Structures, 197. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"DesignPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240615499833 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design of cellular steel beams subjected to lateral torsional buckling},\njournal = {Thin-Walled Structures},\nauthor = {Boissonnade, Nicolas and Nseir, Joanna and Somja, Hugues},\nvolume = {197},\nyear = {2024},\nissn = {02638231},\nabstract = {<div data-language="eng" data-ev-field="abstract">The present paper investigates the lateral torsional buckling resistance of cellular steel beams numerically. Such beams are quite sensitive to lateral instability owing to a substantial increase in depth of the cross-section with respect to the base profile. While a companion paper was dedicated to (i) characterising experimentally the behaviour of cellular and Angelina beams and to (ii) validating dedicated non-linear shell F.E. models, this paper details the results of extensive numerical studies. Several key parameters in the structural response are investigated, such as the base cross-section profile, bending moment distribution, size and position of the openings, steel grade and member slenderness. The results have further been used to assess an original design proposal for the lateral torsional buckling resistance of such girders. The improved design rules are shown to provide accurate yet safe ultimate load predictions. Also, in comparison with existing and available design rules, the proposal is seen to allow for substantially higher design loads – still safe-sided –, potentially leading to significant material savings.<br/></div> © 2024},\nkey = {Buckling},\n%keywords = {Steel beams and girders;},\n%note = {Buckling resistance;Cellular beams;Cellular steel beams;Design proposal;Design rules;FE model;Lateral instability;Lateral-torsional buckling;Non linear;Non-linear shell FE model;},\nURL = {http://dx.doi.org/10.1016/j.tws.2024.111604},\n} \n\n\n
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The present paper investigates the lateral torsional buckling resistance of cellular steel beams numerically. Such beams are quite sensitive to lateral instability owing to a substantial increase in depth of the cross-section with respect to the base profile. While a companion paper was dedicated to (i) characterising experimentally the behaviour of cellular and Angelina beams and to (ii) validating dedicated non-linear shell F.E. models, this paper details the results of extensive numerical studies. Several key parameters in the structural response are investigated, such as the base cross-section profile, bending moment distribution, size and position of the openings, steel grade and member slenderness. The results have further been used to assess an original design proposal for the lateral torsional buckling resistance of such girders. The improved design rules are shown to provide accurate yet safe ultimate load predictions. Also, in comparison with existing and available design rules, the proposal is seen to allow for substantially higher design loads – still safe-sided –, potentially leading to significant material savings.
© 2024\n
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\n \n\n \n \n \n \n \n \n Experimental and numerical investigation of the flexural behavior of one–way RC slabs strengthened with near–surface mounted and externally bonded systems.\n \n \n \n \n\n\n \n Aljidda, O.; El Refai, A.; and Alnahhal, W.\n\n\n \n\n\n\n Construction and Building Materials, 421. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241115738622 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental and numerical investigation of the flexural behavior of one–way RC slabs strengthened with near–surface mounted and externally bonded systems},\njournal = {Construction and Building Materials},\nauthor = {Aljidda, Omar and El Refai, Ahmed and Alnahhal, Wael},\nvolume = {421},\nyear = {2024},\nissn = {09500618},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study investigated the flexural performance of one-way reinforced concrete (RC) slabs strengthened with two distinct strengthening systems: near–surface mounted (NSM) bars and externally bonded (EB) carbon fiber-reinforced polymer (FRP) strips. The NSM bars comprised four types: carbon FRP (CFRP), basalt FRP (BFRP), glass FRP (GFRP), and stainless–steel (SS) bars. The NSM–strengthened slabs showcased substantial enhancements in yield and ultimate load capacity, ranging from 20 % to 55 % and 59–123 %, respectively. In comparison, those strengthened with EB–CFRP strips displayed increases from 46 % to 107 % and 45–177 %, respectively, depending on the axial stiffness ratio of the strengthening system provided. Furthermore, the slabs reinforced with NSM–BFRP bars showed an 11–25 % improvement in their ductility indices. In contrast, the slabs reinforced with EB experienced a decrease in ductility ranging from 38 % to 50 %. This reduction was attributed to the differences in the modes of failure observed in both strengthening systems. The rupture of the NSM–FRP bars and the strain readings associated at the end of testing confirmed that the tensile strength of the NSM–FRP bars was fully exploited whereas the EB–CFRP strips utilized only 29–36 % of their ultimate tensile strain due to debonding. A finite element (FE) model was formulated to anticipate the behavior of the strengthened slabs. A strong correlation between the numerical predictions and the experimental outcomes was observed. The experimental–to–numerical ratios of the ultimate load ranged between 1.0 and 1.08 for the NSM–strengthened slabs and between 0.98 and 1.38 for the EB–strengthened slabs. This validated the FE models’ ability to capture the nonlinear performance of the strengthened slabs.<br/></div> © 2024 The Authors},\nkey = {Tensile strain},\n%keywords = {Bridge decks;Carbon fiber reinforced plastics;Ductility;Reinforced concrete;Strengthening (metal);Tensile strength;Tensile testing;},\n%note = {Carbon fibre reinforced polymer;Externally bonded;Fiber-reinforced polymers;Fibre reinforced polymers;Flexure behaviors;Near surface mounted;Reinforced concrete slabs;Slab;Strengthening;Strengthening systems;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2024.135709},\n} \n\n\n
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This study investigated the flexural performance of one-way reinforced concrete (RC) slabs strengthened with two distinct strengthening systems: near–surface mounted (NSM) bars and externally bonded (EB) carbon fiber-reinforced polymer (FRP) strips. The NSM bars comprised four types: carbon FRP (CFRP), basalt FRP (BFRP), glass FRP (GFRP), and stainless–steel (SS) bars. The NSM–strengthened slabs showcased substantial enhancements in yield and ultimate load capacity, ranging from 20 % to 55 % and 59–123 %, respectively. In comparison, those strengthened with EB–CFRP strips displayed increases from 46 % to 107 % and 45–177 %, respectively, depending on the axial stiffness ratio of the strengthening system provided. Furthermore, the slabs reinforced with NSM–BFRP bars showed an 11–25 % improvement in their ductility indices. In contrast, the slabs reinforced with EB experienced a decrease in ductility ranging from 38 % to 50 %. This reduction was attributed to the differences in the modes of failure observed in both strengthening systems. The rupture of the NSM–FRP bars and the strain readings associated at the end of testing confirmed that the tensile strength of the NSM–FRP bars was fully exploited whereas the EB–CFRP strips utilized only 29–36 % of their ultimate tensile strain due to debonding. A finite element (FE) model was formulated to anticipate the behavior of the strengthened slabs. A strong correlation between the numerical predictions and the experimental outcomes was observed. The experimental–to–numerical ratios of the ultimate load ranged between 1.0 and 1.08 for the NSM–strengthened slabs and between 0.98 and 1.38 for the EB–strengthened slabs. This validated the FE models’ ability to capture the nonlinear performance of the strengthened slabs.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Passive infrared thermography for subsurface delamination detection in concrete infrastructure: Capabilities.\n \n \n \n \n\n\n \n Pozzer, S.; Omidi, Z.; El Refai, A.; Lopez, F.; Ibarra-Castanedo, C.; and Maldague, X.\n\n\n \n\n\n\n Construction and Building Materials, 419. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"PassivePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240915622828 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Passive infrared thermography for subsurface delamination detection in concrete infrastructure: Capabilities},\njournal = {Construction and Building Materials},\nauthor = {Pozzer, Sandra and Omidi, Zahra and El Refai, Ahmed and Lopez, Fernando and Ibarra-Castanedo, Clemente and Maldague, Xavier},\nvolume = {419},\nyear = {2024},\nissn = {09500618},\nabstract = {<div data-language="eng" data-ev-field="abstract">Passive infrared thermography (IRT) has been introduced as a faster, safer, and contactless alternative for the nondestructive inspection of subsurface delamination in concrete infrastructure. However, some uncertainties remain, such as the absence of an inspection protocol to inspect multiple concrete components and the dependence of the technique's performance on environmental conditions and solar energy. This study presents a proof of concept about the capabilities of passive IRT in detecting subsurface damages in multiple concrete components under variate solar exposure. The passive IRT capabilities are explored by analyzing the thermal sequences obtained from samples of artificially damaged concrete structures inspected over 24 h in various environmental conditions over three seasons. As a result, damages with a size-to-depth (S/D) ratio between 1.0 and 2.7 were detected using the thermal contrast method. Furthermore, the implementation of signal processing techniques yielded an improvement in capabilities ranging from 15% to 52%. Finally, a procedure for acquiring data while inspecting multiple concrete components using passive IRT is proposed.<br/></div> © 2024 The Authors},\nkey = {Thermography (imaging)},\n%keywords = {Concretes;Damage detection;Nondestructive examination;Solar energy;},\n%note = {Civil engineering structures;Concrete;Concrete components;Delaminations detection;Environmental conditions;Non destructive inspection;Passive infrared;Signal-processing;Solar loading;Subsurface delamination;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2024.135542},\n} \n\n\n
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Passive infrared thermography (IRT) has been introduced as a faster, safer, and contactless alternative for the nondestructive inspection of subsurface delamination in concrete infrastructure. However, some uncertainties remain, such as the absence of an inspection protocol to inspect multiple concrete components and the dependence of the technique's performance on environmental conditions and solar energy. This study presents a proof of concept about the capabilities of passive IRT in detecting subsurface damages in multiple concrete components under variate solar exposure. The passive IRT capabilities are explored by analyzing the thermal sequences obtained from samples of artificially damaged concrete structures inspected over 24 h in various environmental conditions over three seasons. As a result, damages with a size-to-depth (S/D) ratio between 1.0 and 2.7 were detected using the thermal contrast method. Furthermore, the implementation of signal processing techniques yielded an improvement in capabilities ranging from 15% to 52%. Finally, a procedure for acquiring data while inspecting multiple concrete components using passive IRT is proposed.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Integrated control strategy for the vibration mitigation of wind turbines based on pitch angle control and TMDI systems.\n \n \n \n \n\n\n \n Tang, J.; Dai, K.; Luo, Y.; Bezabeh, M. A.; and Ding, Z.\n\n\n \n\n\n\n Engineering Structures, 303. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"IntegratedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240515450682 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Integrated control strategy for the vibration mitigation of wind turbines based on pitch angle control and TMDI systems},\njournal = {Engineering Structures},\nauthor = {Tang, Jiawei and Dai, Kaoshan and Luo, Yuxiao and Bezabeh, Matiyas A. and Ding, Zhibin},\nvolume = {303},\nyear = {2024},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Modern wind turbines are becoming taller and more slender to gather wind energy more efficiently and are increasingly installed in complex environments. Consequently, the new generations of wind turbines are prone to vibration-related problems, making the development of vibration control strategies important. Various pitch angle control methods and dynamic vibration absorbers (DVAs) have been proposed recently to reduce the aerodynamic forces and structural responses of wind turbines. However, these approaches are often implemented independently, limiting the effectiveness of the overall control strategy. In this paper, pitch angle control and DVAs are integrated to improve the performance of wind turbines in a complex environment. Firstly, a simplified eight degree-of-freedoms (DOFs) model of the wind turbine is developed using Lagrange's Equation, and the wind turbine is linearized at specific operating points. The NREL 5MW wind turbine is taken as a benchmark model with strategies based on a proportional–integral (PI) pitch controller. Secondly, the pitch angle of each blade is adjusted by the combination of disturbance accommodating control (DAC) and linear quadratic gaussian (LQG) controller considering the wind speed disturbances. Additionally, the tuned mass damper with inerter (TMDI) is adopted to further suppress the structural vibrations. Thirdly, the passive and active methods of TMDl integrated with the pitch controller are investigated. Lastly, the effectiveness of the integrated control strategies is assessed when the wind turbines are subjected to earthquake and wind loads. The results indicate that combining active pitch control and TMDI can improve the power generation performance of wind turbines by reducing structural responses and damage-equivalent loads, and can also improve the power generation performance more effectively than when they are used separately.<br/></div> © 2024 Elsevier Ltd},\nkey = {Wind turbines},\n%keywords = {Acoustic devices;Aerodynamics;Controllers;Electric loads;Integrated control;Structural dynamics;Vibration control;Wind;Wind power;},\n%note = {Complex environments;Disturbance accommodating controls;Individual pitch control;Inerter;Integrated control strategy;Linear Quadratic Gaussian controllers;Performance;Pitch-angle control;Tuned mass damper with inerte;Tuned mass dampers;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2024.117529},\n} \n\n\n
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Modern wind turbines are becoming taller and more slender to gather wind energy more efficiently and are increasingly installed in complex environments. Consequently, the new generations of wind turbines are prone to vibration-related problems, making the development of vibration control strategies important. Various pitch angle control methods and dynamic vibration absorbers (DVAs) have been proposed recently to reduce the aerodynamic forces and structural responses of wind turbines. However, these approaches are often implemented independently, limiting the effectiveness of the overall control strategy. In this paper, pitch angle control and DVAs are integrated to improve the performance of wind turbines in a complex environment. Firstly, a simplified eight degree-of-freedoms (DOFs) model of the wind turbine is developed using Lagrange's Equation, and the wind turbine is linearized at specific operating points. The NREL 5MW wind turbine is taken as a benchmark model with strategies based on a proportional–integral (PI) pitch controller. Secondly, the pitch angle of each blade is adjusted by the combination of disturbance accommodating control (DAC) and linear quadratic gaussian (LQG) controller considering the wind speed disturbances. Additionally, the tuned mass damper with inerter (TMDI) is adopted to further suppress the structural vibrations. Thirdly, the passive and active methods of TMDl integrated with the pitch controller are investigated. Lastly, the effectiveness of the integrated control strategies is assessed when the wind turbines are subjected to earthquake and wind loads. The results indicate that combining active pitch control and TMDI can improve the power generation performance of wind turbines by reducing structural responses and damage-equivalent loads, and can also improve the power generation performance more effectively than when they are used separately.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Flexural strengthening of one-way reinforced concrete slabs using near surface-mounted BFRP bars.\n \n \n \n \n\n\n \n Aljidda, O.; Alnahhal, W.; and El Refai, A.\n\n\n \n\n\n\n Engineering Structures, 303. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"FlexuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240415438316 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Flexural strengthening of one-way reinforced concrete slabs using near surface-mounted BFRP bars},\njournal = {Engineering Structures},\nauthor = {Aljidda, Omar and Alnahhal, Wael and El Refai, Ahmed},\nvolume = {303},\nyear = {2024},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study examines the flexural behavior of reinforced concrete (RC) one-way slabs strengthened with near-surface mounted (NSM) basalt fiber-reinforced polymer (BFRP) bars. Ten RC slabs were subjected to four-point loading until failure. Various parameters including the steel reinforcement ratio (0.48and 0.95%), the NSM-BFRP reinforcement ratio (0.17, 0.25, and 0.35%), and two types of epoxy adhesives (Sikadur-30 and NSM-Gel) were investigated. The experimental results demonstrated the remarkable efficacy of the NSM-BFRP bars in enhancing the flexural performance of the strengthened slabs, especially those with lower steel reinforcement ratios. Compared to the control slabs, the ultimate loads were increased by 51‐123% and 21‐44% for slabs with 0.48 and 0.95% steel reinforcement ratios, respectively, while the ductility indices were increased by 10‐53% and 29‐79%. The type of the epoxy adhesive used had minimal impact on the flexural behavior of the strengthened slabs. Failure primarily occurred due to steel yielding followed by the rupture of the NSM-BFRP bars or by concrete crushing, depending on the reinforcement ratio provided. The cracking, yield, and ultimate loads of the strengthened slabs were predicted using the formulations of ACI 440.2R [3] guideline. Good agreement between the predicted and the experimental results were obtained, with ACI formulations being on the conservative side.<br/></div> © 2024 The Authors},\nkey = {Adhesives},\n%keywords = {Concrete slabs;Fiber reinforced plastics;Reinforced concrete;Strengthening (metal);},\n%note = {Basalt fiber;Basalt fiber-reinforced polymer;Fiber-reinforced polymers;Fibre reinforced polymers;Flexure;Near surface mounted;Reinforced concrete slabs;Reinforcement ratios;Strengthening;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2024.117507},\n} \n\n\n
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This study examines the flexural behavior of reinforced concrete (RC) one-way slabs strengthened with near-surface mounted (NSM) basalt fiber-reinforced polymer (BFRP) bars. Ten RC slabs were subjected to four-point loading until failure. Various parameters including the steel reinforcement ratio (0.48and 0.95%), the NSM-BFRP reinforcement ratio (0.17, 0.25, and 0.35%), and two types of epoxy adhesives (Sikadur-30 and NSM-Gel) were investigated. The experimental results demonstrated the remarkable efficacy of the NSM-BFRP bars in enhancing the flexural performance of the strengthened slabs, especially those with lower steel reinforcement ratios. Compared to the control slabs, the ultimate loads were increased by 51‐123% and 21‐44% for slabs with 0.48 and 0.95% steel reinforcement ratios, respectively, while the ductility indices were increased by 10‐53% and 29‐79%. The type of the epoxy adhesive used had minimal impact on the flexural behavior of the strengthened slabs. Failure primarily occurred due to steel yielding followed by the rupture of the NSM-BFRP bars or by concrete crushing, depending on the reinforcement ratio provided. The cracking, yield, and ultimate loads of the strengthened slabs were predicted using the formulations of ACI 440.2R [3] guideline. Good agreement between the predicted and the experimental results were obtained, with ACI formulations being on the conservative side.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Numerical assessment of TMS 402/602-22 and CSA S304-14 seismic design provisions for partially grouted reinforced masonry shear walls failing in flexure.\n \n \n \n \n\n\n \n Elmeligy, O.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 303. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240315406612 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical assessment of TMS 402/602-22 and CSA S304-14 seismic design provisions for partially grouted reinforced masonry shear walls failing in flexure},\njournal = {Engineering Structures},\nauthor = {Elmeligy, Omar and AbdelRahman, Belal and Galal, Khaled},\nvolume = {303},\nyear = {2024},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Despite the economic benefits of using partially grouted reinforced masonry shear walls (PG-RMSWs) as a seismic force resisting system (SFRS) in low-rise buildings, using such a system in mid- and high-rise buildings is still questionable. This is because the literature lacks comprehensive studies investigating different seismic design provisions adopted for rectangular and flanged PG-RMSWs of aspect ratios greater than 2.0 and failing in flexure. Therefore, this study aims to conduct a comprehensive numerical assessment of the seismic design provisions of the North American masonry standards (i.e., TMS 402/602–22 and CSA S304–14) for designing different categories of rectangular and flanged PG-RMSWs failing in flexure. In this regard, 108 PG-RMSWs were designed and modeled using the Extreme Loading for Structures (ELS) software. Afterward, some changes were proposed to the current seismic design provisions in CSA S304–14 and TMS 402/602–22 for rectangular and flanged PG-RMSWs. In addition, a comparison was made between the seismic design provisions for PG-RMSWs and FG-RMSWs, designed according to each RMSW category, to investigate the expected differences in the behavior based on the applied seismic design provisions. Accordingly, additional 36 FG-RMSWs were designed according to CSA S304–14 and TMS 402/602–22. These additional walls were then modeled on the ELS and compared with their PG counterparts. The results show that both standards can be safely used to design rectangular and flanged PG-RMSWs only when using the two proposed provisions for each standard. For CSA S304–14, the possibility of updating clause 16.8.5.2 is concluded, allowing the use of PG-RMSWs without limitations. New seismic force modification factors were also proposed for TMS 402/602–22 for the design of rectangular and flanged PG-RMSWs. Finally, the comparison between rectangular PG and FG-RMSWs failing in flexure and designed according to CSA S304–14 and TMS 402/602–22 shows that the behavior of PG-RMSWs failing in flexure is comparable to FG-RMSWs under certain circumstances. This study is considered a significant step to prove the potential for more economical and safe usage of PG-RMSWs in mid- and high-rise buildings.<br/></div> © 2024 Elsevier Ltd},\nkey = {Seismic design},\n%keywords = {Aspect ratio;Concrete construction;Grouting;Mortar;Reinforcement;Seismology;Shear walls;Tall buildings;},\n%note = {CSA s304;Design provisions;Flanged wall;Flexural-dominated;Fully grouted;High rise building;Masonry shear walls;Partially grouted;Reinforced masonry;TMS 402/602;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.117370},\n} \n\n\n
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Despite the economic benefits of using partially grouted reinforced masonry shear walls (PG-RMSWs) as a seismic force resisting system (SFRS) in low-rise buildings, using such a system in mid- and high-rise buildings is still questionable. This is because the literature lacks comprehensive studies investigating different seismic design provisions adopted for rectangular and flanged PG-RMSWs of aspect ratios greater than 2.0 and failing in flexure. Therefore, this study aims to conduct a comprehensive numerical assessment of the seismic design provisions of the North American masonry standards (i.e., TMS 402/602–22 and CSA S304–14) for designing different categories of rectangular and flanged PG-RMSWs failing in flexure. In this regard, 108 PG-RMSWs were designed and modeled using the Extreme Loading for Structures (ELS) software. Afterward, some changes were proposed to the current seismic design provisions in CSA S304–14 and TMS 402/602–22 for rectangular and flanged PG-RMSWs. In addition, a comparison was made between the seismic design provisions for PG-RMSWs and FG-RMSWs, designed according to each RMSW category, to investigate the expected differences in the behavior based on the applied seismic design provisions. Accordingly, additional 36 FG-RMSWs were designed according to CSA S304–14 and TMS 402/602–22. These additional walls were then modeled on the ELS and compared with their PG counterparts. The results show that both standards can be safely used to design rectangular and flanged PG-RMSWs only when using the two proposed provisions for each standard. For CSA S304–14, the possibility of updating clause 16.8.5.2 is concluded, allowing the use of PG-RMSWs without limitations. New seismic force modification factors were also proposed for TMS 402/602–22 for the design of rectangular and flanged PG-RMSWs. Finally, the comparison between rectangular PG and FG-RMSWs failing in flexure and designed according to CSA S304–14 and TMS 402/602–22 shows that the behavior of PG-RMSWs failing in flexure is comparable to FG-RMSWs under certain circumstances. This study is considered a significant step to prove the potential for more economical and safe usage of PG-RMSWs in mid- and high-rise buildings.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n On optimization of calibrations of a distributed hydrological model with spatially distributed information on snow.\n \n \n \n \n\n\n \n Tiwari, D.; Trudel, M.; and Leconte, R.\n\n\n \n\n\n\n Hydrology and Earth System Sciences, 28(5): 1127 - 1146. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"OnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241115728631 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {On optimization of calibrations of a distributed hydrological model with spatially distributed information on snow},\njournal = {Hydrology and Earth System Sciences},\nauthor = {Tiwari, Dipti and Trudel, Melanie and Leconte, Robert},\nvolume = {28},\nnumber = {5},\nyear = {2024},\npages = {1127 - 1146},\nissn = {10275606},\nabstract = {<div data-language="eng" data-ev-field="abstract">In northern cold-Temperate countries, a large portion of annual streamflow is produced by spring snowmelt, which often triggers floods. It is important to have spatial information about snow variables such as snow water equivalent (SWE), which can be incorporated into hydrological models, making them more efficient tools for improved decision-making. The present research implements a unique spatial pattern metric in a multi-objective framework for calibration of hydrological models and attempts to determine whether raw SNODAS (SNOw Data Assimilation System) data can be utilized for hydrological model calibration. The spatial efficiency (SPAEF) metric is explored for spatially calibrating SWE. Different calibration experiments are performed combining Nash-Sutcliffe efficiency (NSE) for streamflow and root-mean-square error (RMSE) and SPAEF for SWE, using the Dynamically Dimensioned Search (DDS) and Pareto Archived Dynamically Dimensioned Search multi-objective optimization (PADDS) algorithms. Results of the study demonstrate that multi-objective calibration outperforms sequential calibration in terms of model performance (SWE and discharge simulations). Traditional model calibration involving only streamflow produced slightly higher NSE values; however, the spatial distribution of SWE could not be adequately maintained. This study indicates that utilizing SPAEF for spatial calibration of snow parameters improved streamflow prediction compared to the conventional practice of using RMSE for calibration. SPAEF is further implied to be a more effective metric than RMSE for both sequential and multi-objective calibration. During validation, the calibration experiment incorporating multi-objective SPAEF exhibits enhanced performance in terms of NSE and Kling-Gupta efficiency (KGE) compared to calibration experiment solely based on NSE. This observation supports the notion that incorporating SPAEF computed on raw SNODAS data within the calibration framework results in a more robust hydrological model. The novelty of this study is the implementation of SPAEF with respect to spatially distributed SWE for calibrating a distributed hydrological model.<br/></div> © 2024 The Author(s).},\nkey = {Efficiency},\n%keywords = {Climate models;Decision making;Mean square error;Multiobjective optimization;Snow;Spatial distribution;Stream flow;},\n%note = {Calibration experiments;Data assimilation systems;Distributed hydrological modelling;Dynamically dimensioned search;Hydrological models;Multi objective;Multi-objective calibration;Optimisations;Root mean square errors;Snow water equivalent;},\nURL = {http://dx.doi.org/10.5194/hess-28-1127-2024},\n} \n\n\n
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In northern cold-Temperate countries, a large portion of annual streamflow is produced by spring snowmelt, which often triggers floods. It is important to have spatial information about snow variables such as snow water equivalent (SWE), which can be incorporated into hydrological models, making them more efficient tools for improved decision-making. The present research implements a unique spatial pattern metric in a multi-objective framework for calibration of hydrological models and attempts to determine whether raw SNODAS (SNOw Data Assimilation System) data can be utilized for hydrological model calibration. The spatial efficiency (SPAEF) metric is explored for spatially calibrating SWE. Different calibration experiments are performed combining Nash-Sutcliffe efficiency (NSE) for streamflow and root-mean-square error (RMSE) and SPAEF for SWE, using the Dynamically Dimensioned Search (DDS) and Pareto Archived Dynamically Dimensioned Search multi-objective optimization (PADDS) algorithms. Results of the study demonstrate that multi-objective calibration outperforms sequential calibration in terms of model performance (SWE and discharge simulations). Traditional model calibration involving only streamflow produced slightly higher NSE values; however, the spatial distribution of SWE could not be adequately maintained. This study indicates that utilizing SPAEF for spatial calibration of snow parameters improved streamflow prediction compared to the conventional practice of using RMSE for calibration. SPAEF is further implied to be a more effective metric than RMSE for both sequential and multi-objective calibration. During validation, the calibration experiment incorporating multi-objective SPAEF exhibits enhanced performance in terms of NSE and Kling-Gupta efficiency (KGE) compared to calibration experiment solely based on NSE. This observation supports the notion that incorporating SPAEF computed on raw SNODAS data within the calibration framework results in a more robust hydrological model. The novelty of this study is the implementation of SPAEF with respect to spatially distributed SWE for calibrating a distributed hydrological model.
© 2024 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Climate change and future water demand: Implications for chlorine and trihalomethanes management in water distribution systems.\n \n \n \n \n\n\n \n Absalan, F.; Hatam, F.; Prevost, M.; Barbeau, B.; and Bichai, F.\n\n\n \n\n\n\n Journal of Environmental Management, 355. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ClimatePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241015672195 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Climate change and future water demand: Implications for chlorine and trihalomethanes management in water distribution systems},\njournal = {Journal of Environmental Management},\nauthor = {Absalan, Faezeh and Hatam, Fatemeh and Prevost, Michele and Barbeau, Benoit and Bichai, Francoise},\nvolume = {355},\nyear = {2024},\nissn = {03014797},\nabstract = {<div data-language="eng" data-ev-field="abstract">The global change in surface water quality calls for increased preparedness of drinking water utilities. The increasing frequency of extreme climatic events combined with global warming can impact source and treated water characteristics such as temperature and natural organic matter. On the other hand, water saving policies in response to water and energy crisis in some countries can aggravate the situation by increasing the water residence time in the drinking water distribution system (DWDS). This study investigates the individual and combined effect of increased dissolved organic carbon (DOC), increased temperature, and reduced water demand on fate and transport of chlorine and trihalomethanes (THMs) within a full-scale DWDS in Canada. Chlorine and THM prediction models were calibrated with laboratory experiments and implemented in EPANET-MATLAB toolkit for prediction in the DWDS under different combinations of DOC, temperature, and demand. The duration of low chlorine residuals (<0.2 mg/L) and high THM (>80 μg/L) periods within a day in each scenario was reported using a reliability index. Low-reliability zones prone to microbial regrowth or high THM exposure were then delineated geographically on the city DWDS. Results revealed that water demand reduction primarily affects chlorine availability, with less concern for THM formation. The reduction in nodal chlorine reliability was gradual with rising temperature and DOC of the treated water and reducing water demand. Nodal THM reliability remained unchanged until certain thresholds were reached, i.e., temperature >25 °C for waters with DOC <1.52 mg/L, and DOC >2.2 mg/L for waters with temperature = 17 °C. At these critical thresholds, an abrupt network-wide THM exceedance of 80 μg/L occurred. Under higher DOC and temperature levels in future, employing the proposed approach revealed that increasing the applied chlorine dosage (which is a conventional method used to ensure sufficient chlorine coverage) results in elevated exposure toTHMs and is not recommended. This approach aids water utilities in assessing the effectiveness of different intervention measures to solve water quality problems, identify site-specific thresholds leading to major decreases in system reliability, and integrate climate adaptation into water safety management.<br/></div> © 2024},\nkey = {Water conservation},\n%keywords = {Chlorine;Energy policy;Global warming;Organic carbon;Potable water;Quality management;Residence time distribution;Surface waters;Water quality;Water treatment;},\n%note = {Climatic events;Disinfection by-product;Disinfection byproducts;Dissolved organic carbon;Drinking water distribution system;Trihalomethanes;Water demand;Water distribution networks;Water quality management;Water quality modelling;},\nURL = {http://dx.doi.org/10.1016/j.jenvman.2024.120470},\n} \n\n\n
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The global change in surface water quality calls for increased preparedness of drinking water utilities. The increasing frequency of extreme climatic events combined with global warming can impact source and treated water characteristics such as temperature and natural organic matter. On the other hand, water saving policies in response to water and energy crisis in some countries can aggravate the situation by increasing the water residence time in the drinking water distribution system (DWDS). This study investigates the individual and combined effect of increased dissolved organic carbon (DOC), increased temperature, and reduced water demand on fate and transport of chlorine and trihalomethanes (THMs) within a full-scale DWDS in Canada. Chlorine and THM prediction models were calibrated with laboratory experiments and implemented in EPANET-MATLAB toolkit for prediction in the DWDS under different combinations of DOC, temperature, and demand. The duration of low chlorine residuals (<0.2 mg/L) and high THM (>80 μg/L) periods within a day in each scenario was reported using a reliability index. Low-reliability zones prone to microbial regrowth or high THM exposure were then delineated geographically on the city DWDS. Results revealed that water demand reduction primarily affects chlorine availability, with less concern for THM formation. The reduction in nodal chlorine reliability was gradual with rising temperature and DOC of the treated water and reducing water demand. Nodal THM reliability remained unchanged until certain thresholds were reached, i.e., temperature >25 °C for waters with DOC <1.52 mg/L, and DOC >2.2 mg/L for waters with temperature = 17 °C. At these critical thresholds, an abrupt network-wide THM exceedance of 80 μg/L occurred. Under higher DOC and temperature levels in future, employing the proposed approach revealed that increasing the applied chlorine dosage (which is a conventional method used to ensure sufficient chlorine coverage) results in elevated exposure toTHMs and is not recommended. This approach aids water utilities in assessing the effectiveness of different intervention measures to solve water quality problems, identify site-specific thresholds leading to major decreases in system reliability, and integrate climate adaptation into water safety management.
© 2024\n
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\n \n\n \n \n \n \n \n \n A deep learning approach to satellite image time series coregistration through alignment of road networks.\n \n \n \n \n\n\n \n Perez, A. F.; Maghoul, P.; and Ashraf, A.\n\n\n \n\n\n\n Neural Computing and Applications, 36(7): 3583 - 3593. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234915183382 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A deep learning approach to satellite image time series coregistration through alignment of road networks},\njournal = {Neural Computing and Applications},\nauthor = {Perez, Andres F. and Maghoul, Pooneh and Ashraf, Ahmed},\nvolume = {36},\nnumber = {7},\nyear = {2024},\npages = {3583 - 3593},\nissn = {09410643},\nabstract = {<div data-language="eng" data-ev-field="abstract">The adverse effects of thawing permafrost on transportation infrastructure in northern regions are exacerbated by climate change. To address this issue, remote sensing techniques can be employed to track deformations in these structures over time. This will allow us to identify regions that are most vulnerable to permafrost degradation, and implement climate adaptation strategies accordingly. The Sentinel-2 mission provides highly suitable data for multitemporal analysis due to its high temporal resolution and multispectral coverage. However, the geometrical misalignment of Sentinel-2 imagery presents a significant challenge for such analysis. In this study, we propose an automatic sub-pixel coregistration algorithm for satellite image time series, specifically focusing on estimating the deformation of linear infrastructure in northern Canada. Our approach involves utilizing a deep learning model to generate binary masks of roads, which are then used to match and align the images. We demonstrate the feasibility of achieving sub-pixel coregistration through road alignment on a small dataset of high-resolution Sentinel-2 images from the town of Gillam in northern Canada. This represents an initial step toward training a road deformation prediction model, which can ultimately contribute to improved infrastructure resilience and adaptation to changing climatic conditions.<br/></div> © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2023.},\nkey = {Climate change},\n%keywords = {Deep learning;Permafrost;Pixels;Remote sensing;Roads and streets;Satellites;Time series;},\n%note = {Coregistration;Image time-series;Northern Canada;Northern regions;Remote-sensing;Road extraction;Satellite image time series;Satellite images;Sub-pixels;Transportation infrastructures;},\nURL = {http://dx.doi.org/10.1007/s00521-023-09242-0},\n} \n\n\n
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The adverse effects of thawing permafrost on transportation infrastructure in northern regions are exacerbated by climate change. To address this issue, remote sensing techniques can be employed to track deformations in these structures over time. This will allow us to identify regions that are most vulnerable to permafrost degradation, and implement climate adaptation strategies accordingly. The Sentinel-2 mission provides highly suitable data for multitemporal analysis due to its high temporal resolution and multispectral coverage. However, the geometrical misalignment of Sentinel-2 imagery presents a significant challenge for such analysis. In this study, we propose an automatic sub-pixel coregistration algorithm for satellite image time series, specifically focusing on estimating the deformation of linear infrastructure in northern Canada. Our approach involves utilizing a deep learning model to generate binary masks of roads, which are then used to match and align the images. We demonstrate the feasibility of achieving sub-pixel coregistration through road alignment on a small dataset of high-resolution Sentinel-2 images from the town of Gillam in northern Canada. This represents an initial step toward training a road deformation prediction model, which can ultimately contribute to improved infrastructure resilience and adaptation to changing climatic conditions.
© The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2023.\n
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\n \n\n \n \n \n \n \n \n Experimental investigation of the compressive and shear behaviours of grouted and hollow masonry constructed with PVA fibre-reinforced mortar and grout.\n \n \n \n \n\n\n \n Elmeligy, O.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Construction and Building Materials, 415. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240515484773 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental investigation of the compressive and shear behaviours of grouted and hollow masonry constructed with PVA fibre-reinforced mortar and grout},\njournal = {Construction and Building Materials},\nauthor = {Elmeligy, Omar and AbdelRahman, Belal and Galal, Khaled},\nvolume = {415},\nyear = {2024},\nissn = {09500618},\nabstract = {<div data-language="eng" data-ev-field="abstract">Polyvinyl alcohol (PVA) fibres are ultra-high-performance fibres that can be used to reinforce cementitious composites. This study experimentally investigated the compression and shear behaviours of grouted and hollow masonry constructed with fibre-reinforced mortar (FRM) used for the joints and/or PVA fibre-reinforced grout (FRG). In this regard, the effect of increasing the fibre content of 6 mm PVA fibres in the FRM on the behaviour of masonry was investigated. Moreover, the effect of changing the fibre length (8 mm and 13 mm PVA fibres) and the fibre content of 13 mm PVA fibres in the FRG on the behaviour of masonry was investigated. This was accomplished by constructing and testing 31 masonry prisms and 29 masonry assemblages. The behaviour of PVA-reinforced masonry was evaluated based on compressive strength, shear strength, modulus of elasticity, modulus of rigidity, compressive strain at peak compressive stress, shear strain at peak shear stress, compression ductility index and compression toughness. In addition, the compression and shear stress-strain curves, failure modes and crack propagation of PVA-reinforced masonry were compared with unreinforced masonry. It was concluded that using PVA fibres in the grout minimized the masonry face shell spalling, and most of the post-peak deterioration appeared in the form of masonry cracks and less face shell spalling compared with unreinforced masonry. In addition, using PVA-FRM only or PVA-FRM with PVA-FRG could increase the compressive strength of grouted masonry. In contrast, using PVA-FRM did not change the compressive strength of hollow masonry. Furthermore, all grouted assemblages with PVA-FRM and PVA-FRG (except for assemblages with 13 mm PVA-FRG with a fibre content of 0.10% by weight of grout) have similar average shear strength compared with unreinforced assemblages. Finally, As the fibre content of 6 mm PVA fibres in the FRM of hollow assemblages increased, the shear strength and the modulus of rigidity decreased. This study highlights the improvements and drawbacks of using PVA Fibres in mortar and grout on the compressive and shear performances of hollow and grouted masonry.<br/></div> © 2024 Elsevier Ltd},\nkey = {Compressive strength},\n%keywords = {Concrete construction;Cracks;Deterioration;Elastic moduli;Fibers;Grouting;Mortar;Prisms;Reinforcement;Rigidity;Shear strain;Shear stress;Spalling;Stress-strain curves;Thawing;},\n%note = {Assemblage.;Fiber-reinforced grout and fiber-reinforced mortar;Fibers content;Fibre reinforced mortars;Fibre-reinforced;Grouted masonry;Hollow masonry;Polyvinyl alcohol fiber;Shear behaviour;Shears strength;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2024.134954},\n} \n\n\n
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Polyvinyl alcohol (PVA) fibres are ultra-high-performance fibres that can be used to reinforce cementitious composites. This study experimentally investigated the compression and shear behaviours of grouted and hollow masonry constructed with fibre-reinforced mortar (FRM) used for the joints and/or PVA fibre-reinforced grout (FRG). In this regard, the effect of increasing the fibre content of 6 mm PVA fibres in the FRM on the behaviour of masonry was investigated. Moreover, the effect of changing the fibre length (8 mm and 13 mm PVA fibres) and the fibre content of 13 mm PVA fibres in the FRG on the behaviour of masonry was investigated. This was accomplished by constructing and testing 31 masonry prisms and 29 masonry assemblages. The behaviour of PVA-reinforced masonry was evaluated based on compressive strength, shear strength, modulus of elasticity, modulus of rigidity, compressive strain at peak compressive stress, shear strain at peak shear stress, compression ductility index and compression toughness. In addition, the compression and shear stress-strain curves, failure modes and crack propagation of PVA-reinforced masonry were compared with unreinforced masonry. It was concluded that using PVA fibres in the grout minimized the masonry face shell spalling, and most of the post-peak deterioration appeared in the form of masonry cracks and less face shell spalling compared with unreinforced masonry. In addition, using PVA-FRM only or PVA-FRM with PVA-FRG could increase the compressive strength of grouted masonry. In contrast, using PVA-FRM did not change the compressive strength of hollow masonry. Furthermore, all grouted assemblages with PVA-FRM and PVA-FRG (except for assemblages with 13 mm PVA-FRG with a fibre content of 0.10% by weight of grout) have similar average shear strength compared with unreinforced assemblages. Finally, As the fibre content of 6 mm PVA fibres in the FRM of hollow assemblages increased, the shear strength and the modulus of rigidity decreased. This study highlights the improvements and drawbacks of using PVA Fibres in mortar and grout on the compressive and shear performances of hollow and grouted masonry.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Effect of nanoparticle-enhanced biocementation in kaolinite clay by microbially induced calcium carbonate precipitation.\n \n \n \n \n\n\n \n Ghalandarzadeh, S.; Maghoul, P.; Ghalandarzadeh, A.; and Courcelles, B.\n\n\n \n\n\n\n Construction and Building Materials, 414. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"EffectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240315396158 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of nanoparticle-enhanced biocementation in kaolinite clay by microbially induced calcium carbonate precipitation},\njournal = {Construction and Building Materials},\nauthor = {Ghalandarzadeh, Sara and Maghoul, Pooneh and Ghalandarzadeh, Abbas and Courcelles, Benoit},\nvolume = {414},\nyear = {2024},\nissn = {09500618},\nabstract = {<div data-language="eng" data-ev-field="abstract">Microbially induced calcium carbonate precipitation (MICP) is a nature-based technique that has been developed over the past two decades for soil stabilization. However, the use of MICP for clay stabilization has received limited attention in the literature. On the other hand, the utilization of nanomaterials, such as nano-silica (nano-SiO<inf>2</inf>), for soil stabilization has been explored in numerous studies in the literature. This paper investigates the effect of nano-CaCO<inf>3</inf> and nano-SiO<inf>2</inf> on MICP stabilization in kaolinite clay. Nanoparticle-enhanced bio-cementation is introduced to effectively improve the strength of kaolinite clay at high water contents. Unconfined compressive strength (UCS) tests were conducted to evaluate the impact of the nano-bio-treatment (mixture of nano-additives and MICP) on soil strength. Additionally, the microstructure of the treated soils was examined using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Raman spectroscopy, and X-ray diffraction (XRD) analyses. The results indicate that the MICP stabilization method is effective in enhancing the strength of kaolinite soil through a mixing approach. The study of UCS in the treated samples revealed that the use of nano-CaCO<inf>3</inf> and nano-SiO<inf>2</inf> can have either detrimental or beneficial effects on the MICP method, depending on the degree of saturation of the treated samples. The highest UCS observed for the MICP method at a target water content of 0.25 was more than three times that of untreated soil at the same moisture content. Furthermore, the increase in UCS for the samples treated with MICP was 2.5 times that of the untreated soil at a 30% target water content. The most significant finding, however, is that, at a 30% target water content, the samples improved with MICP+ 1.5% nano − SiO<inf>2</inf> exhibited UCS values that were six and fifteen times greater than those of the untreated and MIC-treated samples, respectively. SEM images illustrated that the addition of nano-SiO<inf>2</inf> with the MICP method led to an agglomerated soil texture, and the formation of calcium carbonate attached to the clay minerals. This results in an increase in soil strength.<br/></div> © 2024 The Authors},\nkey = {Calcium carbonate},\n%keywords = {Additives;Bacteriology;Calcite;Carbonation;Clay;Compressive strength;Energy dispersive spectroscopy;Kaolinite;Precipitation (chemical);Scanning electron microscopy;Silica;Silicon;SiO2 nanoparticles;Soil testing;Stabilization;Textures;},\n%note = {8 biocalcification;Bacillus pasteurii;Carbonate precipitation;Kaolinite clay;Microbially induced calcium carbonate precipitation;Nano-SiO 2;Nature-based soil stabilization;Precipitation methods;Soil stabilization;Unconfined compressive strength;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2024.134939},\n} \n\n\n
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Microbially induced calcium carbonate precipitation (MICP) is a nature-based technique that has been developed over the past two decades for soil stabilization. However, the use of MICP for clay stabilization has received limited attention in the literature. On the other hand, the utilization of nanomaterials, such as nano-silica (nano-SiO2), for soil stabilization has been explored in numerous studies in the literature. This paper investigates the effect of nano-CaCO3 and nano-SiO2 on MICP stabilization in kaolinite clay. Nanoparticle-enhanced bio-cementation is introduced to effectively improve the strength of kaolinite clay at high water contents. Unconfined compressive strength (UCS) tests were conducted to evaluate the impact of the nano-bio-treatment (mixture of nano-additives and MICP) on soil strength. Additionally, the microstructure of the treated soils was examined using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Raman spectroscopy, and X-ray diffraction (XRD) analyses. The results indicate that the MICP stabilization method is effective in enhancing the strength of kaolinite soil through a mixing approach. The study of UCS in the treated samples revealed that the use of nano-CaCO3 and nano-SiO2 can have either detrimental or beneficial effects on the MICP method, depending on the degree of saturation of the treated samples. The highest UCS observed for the MICP method at a target water content of 0.25 was more than three times that of untreated soil at the same moisture content. Furthermore, the increase in UCS for the samples treated with MICP was 2.5 times that of the untreated soil at a 30% target water content. The most significant finding, however, is that, at a 30% target water content, the samples improved with MICP+ 1.5% nano − SiO2 exhibited UCS values that were six and fifteen times greater than those of the untreated and MIC-treated samples, respectively. SEM images illustrated that the addition of nano-SiO2 with the MICP method led to an agglomerated soil texture, and the formation of calcium carbonate attached to the clay minerals. This results in an increase in soil strength.
© 2024 The Authors\n
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\n \n\n \n \n \n \n \n \n Field monitoring of river ice processes in the vicinity of ice control structures in the province of Quebec, Canada.\n \n \n \n \n\n\n \n Pourshahbaz, H.; Ghobrial, T.; and Shakibaeinia, A.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 51(2): 200 - 214. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"FieldPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240715548263 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Field monitoring of river ice processes in the vicinity of ice control structures in the province of Quebec, Canada},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Pourshahbaz, Hanif and Ghobrial, Tadros and Shakibaeinia, Ahmad},\nvolume = {51},\nnumber = {2},\nyear = {2024},\npages = {200 - 214},\nissn = {03151468},\nabstract = {<div data-language="eng" data-ev-field="abstract">Over the past decades, a variety of ice control structures (ICSs) have been designed and built, but to date, there has been no systematic evaluation of the effectiveness of these structures. To achieve this objective, first an understanding of the interaction between different ice processes and the ICSs must be established. For this purpose, a total of four ICSs located in the province of Québec were monitored during the 2021–2022 winter. The results showed that the ice jam holding time could vary from 1.5 to 68.5 h. The release of the jam was mechanically driven when the ratio of release to initiation Froude number was higher than one and was thermally driven when this ratio was lower than one, and the water temperature increased between initiation and release. Also, as the ratio of the total pier spacing to upstream river width increased, the holding time decreased.<br/></div> © 2023 The Author(s).},\nkey = {Ice},\n%keywords = {Flood control;Ice control;Rivers;},\n%note = {Control structure;Control works;Field monitoring;Holding time;HS–flood control work;Ice control structure;Ice engineering;Ice jams;River ice process;Systematic evaluation;},\nURL = {http://dx.doi.org/10.1139/cjce-2023-0087},\n} \n\n\n
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Over the past decades, a variety of ice control structures (ICSs) have been designed and built, but to date, there has been no systematic evaluation of the effectiveness of these structures. To achieve this objective, first an understanding of the interaction between different ice processes and the ICSs must be established. For this purpose, a total of four ICSs located in the province of Québec were monitored during the 2021–2022 winter. The results showed that the ice jam holding time could vary from 1.5 to 68.5 h. The release of the jam was mechanically driven when the ratio of release to initiation Froude number was higher than one and was thermally driven when this ratio was lower than one, and the water temperature increased between initiation and release. Also, as the ratio of the total pier spacing to upstream river width increased, the holding time decreased.
© 2023 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Detecting Multiple Damages in UHPFRC Beams through Modal Curvature Analysis.\n \n \n \n \n\n\n \n Sokhangou, F.; Sorelli, L.; Chouinard, L.; Dey, P.; and Conciatori, D.\n\n\n \n\n\n\n Sensors, 24(3). 2024.\n \n\n\n\n
\n\n\n\n \n \n \"DetectingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240715546663 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Detecting Multiple Damages in UHPFRC Beams through Modal Curvature Analysis},\njournal = {Sensors},\nauthor = {Sokhangou, Fahime and Sorelli, Luca and Chouinard, Luc and Dey, Pampa and Conciatori, David},\nvolume = {24},\nnumber = {3},\nyear = {2024},\nissn = {14248220},\nabstract = {<div data-language="eng" data-ev-field="abstract">Curvature-based damage detection has been previously applied to identify damage in concrete structures, but little attention has been given to the capacity of this method to identify distributed damage in multiple damage zones. This study aims to apply for the first time an enhanced existing method based on modal curvature analysis combined with wavelet transform curvature (WTC) to identify zones and highlight the damage zones of a beam made of ultra-high-performance fiber-reinforced concrete (UHPFRC), a construction material that is emerging worldwide for its outstanding performance and durability. First, three beams with a 2 m span of UHPFRC material were cast, and damaged zones were created by sawing. A reference beam without cracks was also cast. The free vibration responses were measured by 12 accelerometers and calculated by operational modal analysis. Moreover, for the sake of comparison, a finite element model (FEM) was also applied to two identical beams to generate numerical acceleration without noise. Second, the modal curvature was calculated for different modes for both experimental and FEM-simulated acceleration after applying cubic spline interpolation. Finally, two damage identification methods were considered: (i) the damage index (DI), based on averaging the quadratic difference of the local curvature with respect to the reference beam, and (ii) the WTC method, applied to the quadratic difference of the local curvature with respect the reference beam. The results indicate that the developed coupled modal curvature WTC method can better identify the damaged zones of UHPFRC beams.<br/></div> © 2024 by the authors.},\nkey = {Wavelet transforms},\n%keywords = {Acceleration;Concrete beams and girders;Crack detection;Damage detection;Fibers;High performance concrete;Interpolation;Modal analysis;Reinforced concrete;Structural health monitoring;Vibration analysis;},\n%note = {Concrete beam;Curvature of mode shape;High-performance fiber reinforced concretes;Modal curvatures;Mode shapes;Reference beams;Ultra high performance;Ultra-high-performance fiber-reinforced concrete;Vibration;Wavelets transform;},\nURL = {http://dx.doi.org/10.3390/s24030971},\n} \n\n\n
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Curvature-based damage detection has been previously applied to identify damage in concrete structures, but little attention has been given to the capacity of this method to identify distributed damage in multiple damage zones. This study aims to apply for the first time an enhanced existing method based on modal curvature analysis combined with wavelet transform curvature (WTC) to identify zones and highlight the damage zones of a beam made of ultra-high-performance fiber-reinforced concrete (UHPFRC), a construction material that is emerging worldwide for its outstanding performance and durability. First, three beams with a 2 m span of UHPFRC material were cast, and damaged zones were created by sawing. A reference beam without cracks was also cast. The free vibration responses were measured by 12 accelerometers and calculated by operational modal analysis. Moreover, for the sake of comparison, a finite element model (FEM) was also applied to two identical beams to generate numerical acceleration without noise. Second, the modal curvature was calculated for different modes for both experimental and FEM-simulated acceleration after applying cubic spline interpolation. Finally, two damage identification methods were considered: (i) the damage index (DI), based on averaging the quadratic difference of the local curvature with respect to the reference beam, and (ii) the WTC method, applied to the quadratic difference of the local curvature with respect the reference beam. The results indicate that the developed coupled modal curvature WTC method can better identify the damaged zones of UHPFRC beams.
© 2024 by the authors.\n
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\n \n\n \n \n \n \n \n \n CFD modeling of Wind-Driven Rain (WDR) on a mid-rise building in an urban area.\n \n \n \n \n\n\n \n Gholamalipour, P.; Ge, H.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 245. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"CFDPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240215370516 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {CFD modeling of Wind-Driven Rain (WDR) on a mid-rise building in an urban area},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Gholamalipour, Payam and Ge, Hua and Stathopoulos, Ted},\nvolume = {245},\nyear = {2024},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">Wind-Driven Rain (WDR) loading on building facades is a crucial factor for designing sustainable and climate-resilient buildings and preserving historical buildings. WDR loading on buildings has been studied previously but results for such a multi-parameter problem are not generally conclusive. Thus, the relevant provisions of ISO semi-empirical model cannot be applied with confidence for complex building configurations, such as those in urban areas given that the estimated WDR can be more than twice of the field measurements. This paper aims to evaluate the effectiveness of two WDR techniques, namely Lagrangian Particle Tracking (LPT) and Eulerian Multiphase (EM), combined with the steady-state standard k-ω RANS turbulence model (referred to as RANS-LPT and RANS-EM). The results obtained from the RANS-EM approach are compared with the RANS-LPT results reported in the literature for a six-story mid-rise residential building located in Vancouver, Canada. The study considers 13 distinct rainfall events, including stand-alone and urban area configurations with and without overhangs. The RANS-EM and RANS-LPT approaches are evaluated by comparing modeled wind and WDR against wind-tunnel and on-site WDR measurements, respectively. The study found that the RANS-EM requires less computational time and provides more accurate results for the test building situated in an urban area compared to the RANS-LPT.<br/></div> © 2024 Elsevier Ltd},\nkey = {Wind tunnels},\n%keywords = {Buildings;Historic preservation;Navier Stokes equations;Rain;Turbulence models;},\n%note = {CFD modeling;Euler-Euler;Euler-euler framework;Eulerian;Eulerian multiphase model;Multiphase modeling;Overhang;Urban areas;Wind-driven rain;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2023.105637},\n} \n\n\n
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Wind-Driven Rain (WDR) loading on building facades is a crucial factor for designing sustainable and climate-resilient buildings and preserving historical buildings. WDR loading on buildings has been studied previously but results for such a multi-parameter problem are not generally conclusive. Thus, the relevant provisions of ISO semi-empirical model cannot be applied with confidence for complex building configurations, such as those in urban areas given that the estimated WDR can be more than twice of the field measurements. This paper aims to evaluate the effectiveness of two WDR techniques, namely Lagrangian Particle Tracking (LPT) and Eulerian Multiphase (EM), combined with the steady-state standard k-ω RANS turbulence model (referred to as RANS-LPT and RANS-EM). The results obtained from the RANS-EM approach are compared with the RANS-LPT results reported in the literature for a six-story mid-rise residential building located in Vancouver, Canada. The study considers 13 distinct rainfall events, including stand-alone and urban area configurations with and without overhangs. The RANS-EM and RANS-LPT approaches are evaluated by comparing modeled wind and WDR against wind-tunnel and on-site WDR measurements, respectively. The study found that the RANS-EM requires less computational time and provides more accurate results for the test building situated in an urban area compared to the RANS-LPT.
© 2024 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Wind induced peak pressures on low-rise building roofs via dynamic terrain computational methodology.\n \n \n \n \n\n\n \n Potsis, T.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 245. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"WindPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240215370792 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind induced peak pressures on low-rise building roofs via dynamic terrain computational methodology},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Potsis, Theodore and Stathopoulos, Ted},\nvolume = {245},\nyear = {2024},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">Computational Wind Engineering is expanding rapidly in the last decade and is expected to be introduced as a design tool for wind-induced loads in future code provisions and standards worldwide. The paper discusses the current CWE shortcomings of the state-of-the-art and proposes a methodology that targets to close the current research gaps, from a practical point of view. Monitoring wind tunnel experiments, significant deviations of instantaneous velocity profiles due to high turbulence intensity are expected to be critical for design pressures. This inspired the novel modeling technique - named Dynamic Terrain - that reformulates the turbulence characteristics and assumes that each instantaneous profile is produced by changing the corresponding terrain conditions. Successively derived profiles from the wind tunnel are introduced as inlet conditions in coarse LES computational domain and propagate inside the domain to interact with the building. The incident flow is successfully modelled, in terms of mean, turbulence intensity and spectral content. Mean, standard deviations and peak pressure coefficients correlate well with experimental results and the procedure is advantageous compared to similar computational techniques. The target accuracy is achieved, benefits and limitations of the method are discussed, and conclusions based on experimental and computational observations are drawn.<br/></div> © 2023 Elsevier Ltd},\nkey = {Computational fluid dynamics},\n%keywords = {Landforms;Turbulence;Wind tunnels;},\n%note = {'current;Building roof;Computational methodology;Computational wind engineering;Dynamic terrain;Low-rise buildings;Peak pressure;Turbulence intensity;Turbulence modeling;Wind-induced pressure;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2023.105630},\n} \n\n\n\n
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Computational Wind Engineering is expanding rapidly in the last decade and is expected to be introduced as a design tool for wind-induced loads in future code provisions and standards worldwide. The paper discusses the current CWE shortcomings of the state-of-the-art and proposes a methodology that targets to close the current research gaps, from a practical point of view. Monitoring wind tunnel experiments, significant deviations of instantaneous velocity profiles due to high turbulence intensity are expected to be critical for design pressures. This inspired the novel modeling technique - named Dynamic Terrain - that reformulates the turbulence characteristics and assumes that each instantaneous profile is produced by changing the corresponding terrain conditions. Successively derived profiles from the wind tunnel are introduced as inlet conditions in coarse LES computational domain and propagate inside the domain to interact with the building. The incident flow is successfully modelled, in terms of mean, turbulence intensity and spectral content. Mean, standard deviations and peak pressure coefficients correlate well with experimental results and the procedure is advantageous compared to similar computational techniques. The target accuracy is achieved, benefits and limitations of the method are discussed, and conclusions based on experimental and computational observations are drawn.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Effect of boundary element detailing on the seismic performance of reinforced concrete masonry shear walls.\n \n \n \n \n\n\n \n Albutainy, M.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 300. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"EffectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234915159910 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of boundary element detailing on the seismic performance of reinforced concrete masonry shear walls},\njournal = {Engineering Structures},\nauthor = {Albutainy, Mohammed and Galal, Khaled},\nvolume = {300},\nyear = {2024},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Laboratory tests demonstrated that reinforced masonry shear walls (RMSWs) can provide sufficient strength and ductility to be considered an efficient seismic force resisting system (SFRS) for mid-rise buildings. The ductility and overall seismic performance of shear walls were increased by providing confinement to the end zones of the walls to form boundary elements (BEs)., which enhanced the ultimate masonry compressive strain and curvature ductility of the walls. Regular stretcher blocks are commonly used in the construction of masonry boundary elements; however, they impose some constraints due to their geometrical characteristics. This study investigated the construction and testing of three half scale specimens of reinforced masonry shear walls with boundary elements (RMSWs+BEs) that were characterized by flexural dominance under reversed cyclic moment and lateral loading. In the lower story panel of a 12-story RMSW building, these walls constitute the plastic hinge zone, which is represented by a plastic hinge wall. In this study, C-shaped masonry units were used instead of stretcher units to construct BEs with different sizes and vertical reinforcement ratios. The findings of this work revealed that employing C-shaped masonry units to construct the BEs was effective in overcoming the construction limits imposed by stretcher units. Additionally, the results of this study demonstrated that when RMSWs+BEs are subjected to quasi-static reversed cyclic loading, they are capable of providing a high level of ductility with minimal loss of strength.<br/></div> © 2023 Elsevier Ltd},\nkey = {Ductility},\n%keywords = {Cyclic loads;Reinforced concrete;Seismic waves;Seismology;Shear flow;Shear walls;Tall buildings;},\n%note = {Boundary elements;C shape;C-shape block;C-shaped;Cyclic loading;Masonry shear walls;Masonry units;Multistory building;Reinforced masonry;Seismic Performance;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.117164},\n} \n\n\n
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Laboratory tests demonstrated that reinforced masonry shear walls (RMSWs) can provide sufficient strength and ductility to be considered an efficient seismic force resisting system (SFRS) for mid-rise buildings. The ductility and overall seismic performance of shear walls were increased by providing confinement to the end zones of the walls to form boundary elements (BEs)., which enhanced the ultimate masonry compressive strain and curvature ductility of the walls. Regular stretcher blocks are commonly used in the construction of masonry boundary elements; however, they impose some constraints due to their geometrical characteristics. This study investigated the construction and testing of three half scale specimens of reinforced masonry shear walls with boundary elements (RMSWs+BEs) that were characterized by flexural dominance under reversed cyclic moment and lateral loading. In the lower story panel of a 12-story RMSW building, these walls constitute the plastic hinge zone, which is represented by a plastic hinge wall. In this study, C-shaped masonry units were used instead of stretcher units to construct BEs with different sizes and vertical reinforcement ratios. The findings of this work revealed that employing C-shaped masonry units to construct the BEs was effective in overcoming the construction limits imposed by stretcher units. Additionally, the results of this study demonstrated that when RMSWs+BEs are subjected to quasi-static reversed cyclic loading, they are capable of providing a high level of ductility with minimal loss of strength.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Experimental and numerical investigations towards the lateral torsional buckling of cellular steel beams.\n \n \n \n \n\n\n \n Boissonnade, N.; Nseir, J.; and Somja, H.\n\n\n \n\n\n\n Thin-Walled Structures, 195. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234915182353 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental and numerical investigations towards the lateral torsional buckling of cellular steel beams},\njournal = {Thin-Walled Structures},\nauthor = {Boissonnade, Nicolas and Nseir, Joanna and Somja, Hugues},\nvolume = {195},\nyear = {2024},\nissn = {02638231},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper deals with the response of so-called "cellular members" against lateral torsional buckling. These beams comprising regularly-spaced circular web openings are especially used for their high resistance-to-weight ratio, the possibility to integrate service pipes within their height, and for aesthetics. Such profiles usually exhibit a complex behaviour and many potential failure modes, including interactional local/global instability modes. Regarding global instability, the members are usually designed by means of approximate design rules, which often lead to an unduly conservative solution, with beams sometimes showing up to 150 % resistance reserves. The present research works aim at improving this situation, through the development of adequate design formulae. In this respect, the present paper reports on investigations led towards improved solutions for cellular members at the experimental and numerical levels. This first paper focuses on experimental activities and on the development and validation of dedicated shell F.E. models. The results of three bending tests on members spanning from 7.5 m to 11 m are reported. Cross-sectional dimensions, material properties and accurate initial geometrical imperfections were measured for each specimen and further introduced in the corresponding F.E. models, which are shown to provide predictions in close agreement with the experimental results. The companion paper [1] further makes use of the F.E. models within extensive parametric studies and proposes a new set of design rules that could be proposed for integration in Eurocode 3.<br/></div> © 2023 Elsevier Ltd},\nkey = {Bending tests},\n%keywords = {Buckling;Steel beams and girders;},\n%note = {Cellular beams;Cellulars;Design rules;Experimental investigations;Experimental test;FE model;Global instability;Lateral-torsional buckling;Non linear;Non-linear shell FE model;},\nURL = {http://dx.doi.org/10.1016/j.tws.2023.111388},\n} \n\n\n
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This paper deals with the response of so-called \"cellular members\" against lateral torsional buckling. These beams comprising regularly-spaced circular web openings are especially used for their high resistance-to-weight ratio, the possibility to integrate service pipes within their height, and for aesthetics. Such profiles usually exhibit a complex behaviour and many potential failure modes, including interactional local/global instability modes. Regarding global instability, the members are usually designed by means of approximate design rules, which often lead to an unduly conservative solution, with beams sometimes showing up to 150 % resistance reserves. The present research works aim at improving this situation, through the development of adequate design formulae. In this respect, the present paper reports on investigations led towards improved solutions for cellular members at the experimental and numerical levels. This first paper focuses on experimental activities and on the development and validation of dedicated shell F.E. models. The results of three bending tests on members spanning from 7.5 m to 11 m are reported. Cross-sectional dimensions, material properties and accurate initial geometrical imperfections were measured for each specimen and further introduced in the corresponding F.E. models, which are shown to provide predictions in close agreement with the experimental results. The companion paper [1] further makes use of the F.E. models within extensive parametric studies and proposes a new set of design rules that could be proposed for integration in Eurocode 3.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Experimental and numerical investigation of two–span RC beams strengthened with fiber–reinforced cementitious matrix (FRCM).\n \n \n \n \n\n\n \n Taie, B.; Mandor, A.; and El Refai, A.\n\n\n \n\n\n\n Engineering Structures, 300. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234915153112 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental and numerical investigation of two–span RC beams strengthened with fiber–reinforced cementitious matrix (FRCM)},\njournal = {Engineering Structures},\nauthor = {Taie, Basma and Mandor, Ahmed and El Refai, Ahmed},\nvolume = {300},\nyear = {2024},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper investigated both experimentally and numerically the flexural performance of two–span beams after being strengthened with polyparaphenylene benzobisoxazole (PBO) fiber–reinforced cementitious matrix (FRCM) systems at different hogging–to–sagging (H/S) strengthening ratios. The test results revealed that the enhancement in the flexural response of the strengthened beams was highly dependent on the strengthening configuration and the number of layers used in both the hogging and sagging sections. The H/S ratio had a notable effect on the failure modes of the hogging sections only whereas the sagging sections showed similar failure modes regardless of the H/S used. Strengthening the sagging sections governed the ductility of the tested beams with a slight effect of the H/S ratio on their ductility. Despite strengthening, the hogging sections were capable to redistribute up to 37% of their moments to the sagging sections, which represented 93% of the redistribution capacity of the unstrengthened sections. This finding suggests the revision of the CSA and ACI formulations that prohibit any moment redistribution in the design of externally–bonded strengthened elements. The developed finite element model accurately predicted the experimental results in terms of the failure modes, the load–carrying capacity, the ductility, and the moment redistribution ratios between the critical sections.<br/></div> © 2023 Elsevier Ltd},\nkey = {Ductility},\n%keywords = {Concrete beams and girders;Failure modes;Reinforcement;},\n%note = {Cementitious matrices;Continuous beams;Experimental investigations;Fiber–reinforced cementitious matrix;Fibre-reinforced;Hogging;Moment redistribution;Sagging;Seismic;Strengthening;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.117246},\n} \n\n\n
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This paper investigated both experimentally and numerically the flexural performance of two–span beams after being strengthened with polyparaphenylene benzobisoxazole (PBO) fiber–reinforced cementitious matrix (FRCM) systems at different hogging–to–sagging (H/S) strengthening ratios. The test results revealed that the enhancement in the flexural response of the strengthened beams was highly dependent on the strengthening configuration and the number of layers used in both the hogging and sagging sections. The H/S ratio had a notable effect on the failure modes of the hogging sections only whereas the sagging sections showed similar failure modes regardless of the H/S used. Strengthening the sagging sections governed the ductility of the tested beams with a slight effect of the H/S ratio on their ductility. Despite strengthening, the hogging sections were capable to redistribute up to 37% of their moments to the sagging sections, which represented 93% of the redistribution capacity of the unstrengthened sections. This finding suggests the revision of the CSA and ACI formulations that prohibit any moment redistribution in the design of externally–bonded strengthened elements. The developed finite element model accurately predicted the experimental results in terms of the failure modes, the load–carrying capacity, the ductility, and the moment redistribution ratios between the critical sections.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Towards reliable seismic fragility assessment of highway bridges with oblong columns considering the drift-based capacity directionality effect.\n \n \n \n \n\n\n \n Song, S.; and Xie, Y.\n\n\n \n\n\n\n Engineering Structures, 300. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"TowardsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234715095349 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Towards reliable seismic fragility assessment of highway bridges with oblong columns considering the drift-based capacity directionality effect},\njournal = {Engineering Structures},\nauthor = {Song, Sirui and Xie, Yazhou},\nvolume = {300},\nyear = {2024},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Highway bridges in seismic zones are commonly designed with oblong columns, featuring different force-displacement relationships and seismic capacities along different response directions. However, the state-of-art seismic fragility assessment treats seismic demand and capacity models as two independent models, which cannot capture the in-between directional dependence and correlation for oblong columns. This study develops direction-dependent seismic capacity limit state models and proposes a multi-step analysis framework to assess the seismic fragility of highway bridges with flexure-controlled oblong columns. Cyclic pushover analyses are conducted along different loading directions to identify direction-sensitive column drift ratios against four damage states. These drift ratios are utilized to regress a closed-form model, namely the directional capacity ratio model, to quantify the changes in drift capacities as a function of the column response angle. This model is integrated into an analysis framework to directly simulate the demand-capacity ratio (DCR) time history, where the peak value is utilized to assess the seismic fragility of the oblong column. The case study indicates that the most severe seismic damage to an oblong column is not necessarily along its principal axis. The proposed analysis framework outperforms existing approaches in having more reliable fragility estimates for the oblong column and bridge system.<br/></div> © 2023 Elsevier Ltd},\nkey = {Highway bridges},\n%keywords = {Seismology;},\n%note = {Analysis frameworks;Capacity directionality;Demand-capacity ratio;Directional capacity ratio model;Fragility assessment;Oblong column;Ratio models;Seismic capacity;Seismic fragility;Seismic fragility assessment;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.117165},\n} \n\n\n
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Highway bridges in seismic zones are commonly designed with oblong columns, featuring different force-displacement relationships and seismic capacities along different response directions. However, the state-of-art seismic fragility assessment treats seismic demand and capacity models as two independent models, which cannot capture the in-between directional dependence and correlation for oblong columns. This study develops direction-dependent seismic capacity limit state models and proposes a multi-step analysis framework to assess the seismic fragility of highway bridges with flexure-controlled oblong columns. Cyclic pushover analyses are conducted along different loading directions to identify direction-sensitive column drift ratios against four damage states. These drift ratios are utilized to regress a closed-form model, namely the directional capacity ratio model, to quantify the changes in drift capacities as a function of the column response angle. This model is integrated into an analysis framework to directly simulate the demand-capacity ratio (DCR) time history, where the peak value is utilized to assess the seismic fragility of the oblong column. The case study indicates that the most severe seismic damage to an oblong column is not necessarily along its principal axis. The proposed analysis framework outperforms existing approaches in having more reliable fragility estimates for the oblong column and bridge system.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Pragmatic seismic collapse meso-scale analysis of old Dutch masonry churches.\n \n \n \n \n\n\n \n Davis, L.; Cogliano, M.; Casotto, C.; Grecchi, G.; Ozcebe, S.; Tsioli, C.; and Malomo, D.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 53(2): 622 - 645. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"PragmaticPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234615053617 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Pragmatic seismic collapse meso-scale analysis of old Dutch masonry churches},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Davis, Lucy and Cogliano, Martina and Casotto, Chiara and Grecchi, Giulia and Ozcebe, Sevgi and Tsioli, Chrysanthi and Malomo, Daniele},\nvolume = {53},\nnumber = {2},\nyear = {2024},\npages = {622 - 645},\nissn = {00988847},\nabstract = {<div data-language="eng" data-ev-field="abstract">The demand for advanced nonlinear time-history and seismic collapse simulations of old unreinforced masonry (URM) constructions to support informed risk evaluation and mitigation plans is rapidly increasing in the structural engineering profession. On one hand, offering cutting-edge solutions based on the latest advances is challenging for practitioners, given the reduced timeframe usually available for projects and the specialized knowledge required. On the other hand, researchers frequently face difficulties in accessing old buildings and gathering key data required in complex numerical collapse analysis strategies. In this work, a pragmatic approach for evaluation of the earthquake collapse response of vulnerable old URM churches typical of the Northern Netherlands, now exposed to low-magnitude induced seismicity due to gas extraction, is presented. To bridge the gap between academic and industry applications, an integrated framework is proposed that combines archival and onsite research, code-based prescriptions, geometrical characterization and simplified discrete element modeling. Main outcomes include the identification of recurrent damage patterns for five old URM churches erected during the 11th, 13th, 14th, and 19th centuries, representative of key traditional multi-leaf and cavity-wall structural types, as well as relevant failure mechanisms and collapsed debris distributions for seismic signals of varying intensities. Produced results constitute a solid foundation of data on which to base the design of ad-hoc retrofits and development of tailored risk assessment models. This study opens a new line of inquiry while discussing practical challenges and research questions which arose, to be of interest to both applied researchers and structural engineering professionals.<br/></div> © 2023 The Authors. Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd.},\nkey = {Religious buildings},\n%keywords = {Damage detection;Earthquake engineering;Earthquakes;Failure (mechanical);Masonry materials;Professional aspects;Risk assessment;Structural analysis;Structural dynamics;},\n%note = {Applied element method;Collapse analysis;Collapse simulation;Discrete elements method;Element method;Masonry churches;Meso scale;Nonlinear time history;Scale analysis;Unreinforced masonries (URMs);},\nURL = {http://dx.doi.org/10.1002/eqe.4037},\n} \n\n\n
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The demand for advanced nonlinear time-history and seismic collapse simulations of old unreinforced masonry (URM) constructions to support informed risk evaluation and mitigation plans is rapidly increasing in the structural engineering profession. On one hand, offering cutting-edge solutions based on the latest advances is challenging for practitioners, given the reduced timeframe usually available for projects and the specialized knowledge required. On the other hand, researchers frequently face difficulties in accessing old buildings and gathering key data required in complex numerical collapse analysis strategies. In this work, a pragmatic approach for evaluation of the earthquake collapse response of vulnerable old URM churches typical of the Northern Netherlands, now exposed to low-magnitude induced seismicity due to gas extraction, is presented. To bridge the gap between academic and industry applications, an integrated framework is proposed that combines archival and onsite research, code-based prescriptions, geometrical characterization and simplified discrete element modeling. Main outcomes include the identification of recurrent damage patterns for five old URM churches erected during the 11th, 13th, 14th, and 19th centuries, representative of key traditional multi-leaf and cavity-wall structural types, as well as relevant failure mechanisms and collapsed debris distributions for seismic signals of varying intensities. Produced results constitute a solid foundation of data on which to base the design of ad-hoc retrofits and development of tailored risk assessment models. This study opens a new line of inquiry while discussing practical challenges and research questions which arose, to be of interest to both applied researchers and structural engineering professionals.
© 2023 The Authors. Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Nonlinear data-driven zero-thickness joint element for concrete dam shear keys.\n \n \n \n \n\n\n \n Freitas, M.; Leger, P.; and Bouaanani, N.\n\n\n \n\n\n\n Finite Elements in Analysis and Design, 229. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"NonlinearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234414992753 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Nonlinear data-driven zero-thickness joint element for concrete dam shear keys},\njournal = {Finite Elements in Analysis and Design},\nauthor = {Freitas, Mario and Leger, Pierre and Bouaanani, Najib},\nvolume = {229},\nyear = {2024},\nissn = {0168874X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Shear keys have been designed into the contraction joints of many concrete gravity dams to provide interlocking and shear transfer between adjacent monoliths. Their shear transferring capacity is usually estimated as the friction and cohesion that can be mobilized across a 2D plane located at the base of the keys. Once the shear stress in the contraction joint exceeds its estimated shear capacity, the shear keys are typically considered failed, and the joint may subsequently only transfer shear through concrete-concrete friction. This behaviour is often simulated in practice by placing tiebreak contact formulations along contraction joints. However, the nonlinear response and potential residual strength of the keys are usually ignored. In this paper, a novel nonlinear zero-thickness joint element named Macro Shear Key Joint Element (MSKJE) is proposed to simulate the response of a detailed shear key while capturing its nonlinear behaviour. A detailed geometrical numerical model of shear keys using a concrete Continuous Surface Cap Model (CSCM) is first validated against experimental data. Then, a parametric analysis of the number of keys in the joint, confinement pressure, initial opening and lateral boundary condition is performed using the validated detailed shear key numerical models. The stress-displacement responses obtained from the parametric analysis are used to calibrate the proposed MSKJE. At the local shear key scale, the MSKJE models present a very similar stress-displacement response compared to the detailed geometrical key models in terms of stiffness, maximum shear capacity, residual strength and nonlinear softening. At the global dam scale, the MSKJE presents a somewhat similar behaviour to the conventional tiebreak formulations. However, the advantages of the MSKJE over the tiebreak contact include its capability to simulate the nonlinear softening of shear keys, and residual sliding displacement, and, once calibrated, it is not necessary to estimate the shear keys capacity a priori.<br/></div> © 2023 Elsevier B.V.},\nkey = {Friction},\n%keywords = {Concrete dams;Concretes;Finite element method;Gravity dams;Nonlinear analysis;Numerical models;Shear stress;},\n%note = {Concrete gravity dams;Contraction joints;F.E. analysis;FE analysis;Joint element;Nonlinear FE analyse;Shear capacity;Shear key;Tiebreak contact;Zero-thickness element;},\nURL = {http://dx.doi.org/10.1016/j.finel.2023.104071},\n} \n\n\n
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Shear keys have been designed into the contraction joints of many concrete gravity dams to provide interlocking and shear transfer between adjacent monoliths. Their shear transferring capacity is usually estimated as the friction and cohesion that can be mobilized across a 2D plane located at the base of the keys. Once the shear stress in the contraction joint exceeds its estimated shear capacity, the shear keys are typically considered failed, and the joint may subsequently only transfer shear through concrete-concrete friction. This behaviour is often simulated in practice by placing tiebreak contact formulations along contraction joints. However, the nonlinear response and potential residual strength of the keys are usually ignored. In this paper, a novel nonlinear zero-thickness joint element named Macro Shear Key Joint Element (MSKJE) is proposed to simulate the response of a detailed shear key while capturing its nonlinear behaviour. A detailed geometrical numerical model of shear keys using a concrete Continuous Surface Cap Model (CSCM) is first validated against experimental data. Then, a parametric analysis of the number of keys in the joint, confinement pressure, initial opening and lateral boundary condition is performed using the validated detailed shear key numerical models. The stress-displacement responses obtained from the parametric analysis are used to calibrate the proposed MSKJE. At the local shear key scale, the MSKJE models present a very similar stress-displacement response compared to the detailed geometrical key models in terms of stiffness, maximum shear capacity, residual strength and nonlinear softening. At the global dam scale, the MSKJE presents a somewhat similar behaviour to the conventional tiebreak formulations. However, the advantages of the MSKJE over the tiebreak contact include its capability to simulate the nonlinear softening of shear keys, and residual sliding displacement, and, once calibrated, it is not necessary to estimate the shear keys capacity a priori.
© 2023 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Cold-formed steel framed shear wall test database.\n \n \n \n \n\n\n \n Zhang, Z.; Eladly, M. M; Rogers, C. A; and Schafer, B. W\n\n\n \n\n\n\n Earthquake Spectra, 40(1): 871 - 884. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"Cold-formedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234414983190 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Cold-formed steel framed shear wall test database},\njournal = {Earthquake Spectra},\nauthor = {Zhang, Zhidong and Eladly, Mohammed M and Rogers, Colin A and Schafer, Benjamin W},\nvolume = {40},\nnumber = {1},\nyear = {2024},\npages = {871 - 884},\nissn = {87552930},\nabstract = {<div data-language="eng" data-ev-field="abstract">Many monotonic and cyclic tests have been conducted on cold-formed steel framed shear walls in the last 20 years. Cold-formed steel framed shear wall provisions in AISI S240, AISI S400, and ASCE 41 are supported by the data obtained through these tests. The main objective of this article is to introduce a recently compiled cold-formed steel framed shear wall test database, to reveal the database structure, and to explain how to access and present the data. Most recently, the database has been standardized and expanded to include additional tests, complete cyclic information from tests, limit states, and code prediction information. The database structure incorporates a central Excel spreadsheet that includes descriptive information; ordered plain text files for each individual test; and custom MATLAB codes, which can read, process, and plot designated database subsets. The provided database can advance the understanding and modeling of cold-formed steel framed shear walls.<br/></div> © The Author(s) 2023.},\nkey = {Shear walls},\n%keywords = {Codes (symbols);Database systems;Earthquake engineering;Spreadsheets;Steel testing;Studs (structural members);},\n%note = {Code predictions;Cold-formed steel;Database structures;Excel spreadsheets;Limit state;Monotonic and cyclic tests;Prediction informations;State prediction;Steel-framed;Test;},\nURL = {http://dx.doi.org/10.1177/87552930231202974},\n} \n\n\n
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Many monotonic and cyclic tests have been conducted on cold-formed steel framed shear walls in the last 20 years. Cold-formed steel framed shear wall provisions in AISI S240, AISI S400, and ASCE 41 are supported by the data obtained through these tests. The main objective of this article is to introduce a recently compiled cold-formed steel framed shear wall test database, to reveal the database structure, and to explain how to access and present the data. Most recently, the database has been standardized and expanded to include additional tests, complete cyclic information from tests, limit states, and code prediction information. The database structure incorporates a central Excel spreadsheet that includes descriptive information; ordered plain text files for each individual test; and custom MATLAB codes, which can read, process, and plot designated database subsets. The provided database can advance the understanding and modeling of cold-formed steel framed shear walls.
© The Author(s) 2023.\n
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\n \n\n \n \n \n \n \n \n Convolutional variational autoencoder for ground motion classification and generation toward efficient seismic fragility assessment.\n \n \n \n \n\n\n \n Ning, C.; and Xie, Y.\n\n\n \n\n\n\n Computer-Aided Civil and Infrastructure Engineering, 39(2): 165 - 185. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ConvolutionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232414246814 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Convolutional variational autoencoder for ground motion classification and generation toward efficient seismic fragility assessment},\njournal = {Computer-Aided Civil and Infrastructure Engineering},\nauthor = {Ning, Chunxiao and Xie, Yazhou},\nvolume = {39},\nnumber = {2},\nyear = {2024},\npages = {165 - 185},\nissn = {10939687},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study develops an end-to-end deep learning framework to learn and analyze ground motions (GMs) through their latent features, and achieve reliable GM classification, selection, and generation of simulated motions. The framework is composed of an analysis workflow that transforms and reconstructs GMs through short-time Fourier transform (STFT), encodes and decodes their latent features through convolutional variational autoencoder (CVAE), and classifies and generates GMs by grouping and interpolating latent variables. A benchmark study is established to confirm the minor difference between original GMs and the corresponding reconstructed accelerograms. The encoded latent space reveals that certain latent variables are directly linked to the dominant physical features of GMs. Resultantly, clustering latent variables using the k-means algorithm successfully classifies GMs into different groups that vary in earthquake magnitude, soil type, field distance, and fault mechanism. By linearly interpolating two parent latent variables, simulated GMs are generated with consistent class information and matching response spectra. Furthermore, seismic fragility models are developed for a steel frame building and a concrete bridge using different sets of GMs. Using five classified, top-ranked motions, regardless of recorded or simulated accelerograms, can achieve reasonable and efficient fragility estimates compared to the case that adopts 230 GMs. The proposed deep learning framework addresses two compelling questions regarding seismic fragility assessment: How many GMs are sufficient and what types of motions should be selected.<br/></div> © 2023 The Authors. Computer-Aided Civil and Infrastructure Engineering published by Wiley Periodicals LLC on behalf of Editor.},\nkey = {Convolution},\n%keywords = {Deep learning;Earthquakes;Graphic methods;Interpolation;K-means clustering;Learning systems;Motion analysis;},\n%note = {Accelerograms;Auto encoders;End to end;Fragility assessment;Ground-motion;Latent variable;Learning frameworks;Motion classification;Motion generation;Seismic fragility;},\nURL = {http://dx.doi.org/10.1111/mice.13061},\n} \n\n\n
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This study develops an end-to-end deep learning framework to learn and analyze ground motions (GMs) through their latent features, and achieve reliable GM classification, selection, and generation of simulated motions. The framework is composed of an analysis workflow that transforms and reconstructs GMs through short-time Fourier transform (STFT), encodes and decodes their latent features through convolutional variational autoencoder (CVAE), and classifies and generates GMs by grouping and interpolating latent variables. A benchmark study is established to confirm the minor difference between original GMs and the corresponding reconstructed accelerograms. The encoded latent space reveals that certain latent variables are directly linked to the dominant physical features of GMs. Resultantly, clustering latent variables using the k-means algorithm successfully classifies GMs into different groups that vary in earthquake magnitude, soil type, field distance, and fault mechanism. By linearly interpolating two parent latent variables, simulated GMs are generated with consistent class information and matching response spectra. Furthermore, seismic fragility models are developed for a steel frame building and a concrete bridge using different sets of GMs. Using five classified, top-ranked motions, regardless of recorded or simulated accelerograms, can achieve reasonable and efficient fragility estimates compared to the case that adopts 230 GMs. The proposed deep learning framework addresses two compelling questions regarding seismic fragility assessment: How many GMs are sufficient and what types of motions should be selected.
© 2023 The Authors. Computer-Aided Civil and Infrastructure Engineering published by Wiley Periodicals LLC on behalf of Editor.\n
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\n \n\n \n \n \n \n \n \n Correction to: Exploring the seismic performance of corroded RC frames with masonry infills (Bulletin of Earthquake Engineering, (2024), 10.1007/s10518-024-02037-1).\n \n \n \n \n\n\n \n Liu, J.; Scattarreggia, N.; and Malomo, D.\n\n\n \n\n\n\n Bulletin of Earthquake Engineering. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"CorrectionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20245117551643 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Correction to: Exploring the seismic performance of corroded RC frames with masonry infills (Bulletin of Earthquake Engineering, (2024), 10.1007/s10518-024-02037-1)},\njournal = {Bulletin of Earthquake Engineering},\nauthor = {Liu, Jiadaren and Scattarreggia, Nicola and Malomo, Daniele},\nyear = {2024},\nissn = {1570761X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Correction: Bulletin of Earthquake Engineeringhttps://doi.org/10.1007/s10518-024-02037-1. Due to technical issues related with figure conversion process during typesetting article was published with poor quality figures and has now been updated with better quality figures as supplied originally. Original article has been corrected.<br/></div> © The Author(s), under exclusive licence to Springer Nature B.V. 2024.},\nURL = {http://dx.doi.org/10.1007/s10518-024-02053-1},\n} \n\n\n
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Correction: Bulletin of Earthquake Engineeringhttps://doi.org/10.1007/s10518-024-02037-1. Due to technical issues related with figure conversion process during typesetting article was published with poor quality figures and has now been updated with better quality figures as supplied originally. Original article has been corrected.
© The Author(s), under exclusive licence to Springer Nature B.V. 2024.\n
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\n \n\n \n \n \n \n \n \n Proposed reliable peak component factors for ductile light NSCs subjected to horizontal ground motions.\n \n \n \n \n\n\n \n Mehrjoo, M.; and Assi, R.\n\n\n \n\n\n\n Bulletin of Earthquake Engineering. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ProposedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20245117542107 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Proposed reliable peak component factors for ductile light NSCs subjected to horizontal ground motions},\njournal = {Bulletin of Earthquake Engineering},\nauthor = {Mehrjoo, Majid and Assi, Rola},\nyear = {2024},\nissn = {1570761X},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper aims to propose reliable factors that accurately capture the effect of target ductility of non-structural components (NSCs) on floor acceleration, velocity, and displacement demands at both the ground level and the upper building floors. A linear time history analysis (THA) was performed on four moment-resisting archetype buildings using historical and synthetic ground motions matched to the Montreal Site Class C uniform hazard spectrum (UHS) through frequency domain matching. The NSCs’ seismic demands and ductility-based modification factors were determined using uncoupled analysis, in which the equations of motion were solved using the Iterative Newmark Integration approach implemented in MATLAB. The seismic floor acceleration, displacement, and velocity demand amplitudes were reduced with increased NSC ductility, especially inside the resonance period range. The effect of ductility on the seismic acceleration demands was found to be significant near the resonance condition for the first three primary periods of the supporting structure. Conversely, the displacement and velocity demand were predominantly affected by the first primary mode. Specifically, for NSCs with moderate to high ductility levels, a 40%-60% decrease in demand was observed compared to NSCs exhibiting elastic behavior in the resonance condition. In contrast, the effect of ductility was minimal for out-of-resonance conditions and on ground-level seismic demands. Moreover, the sensitivity analysis on damping variations showed minimal impact on the proposed factors, further supporting their robustness. In conclusion, while ductility minimizes resonance effects on NSCs, a trade-off between the benefits of ductility and an acceptable damage level must be considered.<br/></div> © The Author(s), under exclusive licence to Springer Nature B.V. 2024.},\nkey = {MATLAB},\n%keywords = {Building components;Floors;Mortar;Seismic response;Sensitivity analysis;Structural analysis;},\n%note = {Acceleration velocities;Component attachment;Ductile behavior;Dynamics analysis;Floor accelerations;Ground level;Newmark integration;Non-structural components;Peak component factor·;Resonance condition;},\nURL = {http://dx.doi.org/10.1007/s10518-024-02081-x},\n} \n\n\n
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This paper aims to propose reliable factors that accurately capture the effect of target ductility of non-structural components (NSCs) on floor acceleration, velocity, and displacement demands at both the ground level and the upper building floors. A linear time history analysis (THA) was performed on four moment-resisting archetype buildings using historical and synthetic ground motions matched to the Montreal Site Class C uniform hazard spectrum (UHS) through frequency domain matching. The NSCs’ seismic demands and ductility-based modification factors were determined using uncoupled analysis, in which the equations of motion were solved using the Iterative Newmark Integration approach implemented in MATLAB. The seismic floor acceleration, displacement, and velocity demand amplitudes were reduced with increased NSC ductility, especially inside the resonance period range. The effect of ductility on the seismic acceleration demands was found to be significant near the resonance condition for the first three primary periods of the supporting structure. Conversely, the displacement and velocity demand were predominantly affected by the first primary mode. Specifically, for NSCs with moderate to high ductility levels, a 40%-60% decrease in demand was observed compared to NSCs exhibiting elastic behavior in the resonance condition. In contrast, the effect of ductility was minimal for out-of-resonance conditions and on ground-level seismic demands. Moreover, the sensitivity analysis on damping variations showed minimal impact on the proposed factors, further supporting their robustness. In conclusion, while ductility minimizes resonance effects on NSCs, a trade-off between the benefits of ductility and an acceptable damage level must be considered.
© The Author(s), under exclusive licence to Springer Nature B.V. 2024.\n
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\n \n\n \n \n \n \n \n \n Shake-Table Testing of a Brick Masonry Groin Vault: Overview of Blind Predictions and Postdictions and Comparison with Experimental Results.\n \n \n \n \n\n\n \n Calderini, C.; Bianchini, N.; Lourenco, P.; Mendes, N.; Candeias, P.; AlShawa, O.; Chacara, C.; Chavez, M.; de Felice, G.; Ferrante, A.; Fici, P.; Gagliardo, R.; Kesavan, P.; Lignola, G.; Malena, M.; Malomo, D.; Pellegrini, D.; Pena, F.; Petracca, M.; Pintucchi, B.; Portioli, F.; Pulatsu, B.; Ramaglia, G.; Rapicavoli, D.; and Trovatelli, F.\n\n\n \n\n\n\n International Journal of Architectural Heritage, 18(12): 1825 - 1851. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"Shake-TablePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244717388418 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shake-Table Testing of a Brick Masonry Groin Vault: Overview of Blind Predictions and Postdictions and Comparison with Experimental Results},\njournal = {International Journal of Architectural Heritage},\nauthor = {Calderini, C. and Bianchini, N. and Lourenco, P.B. and Mendes, N. and Candeias, P.X. and AlShawa, O. and Chacara, C. and Chavez, M.M. and de Felice, G. and Ferrante, A. and Fici, P. and Gagliardo, R. and Kesavan, P. and Lignola, G.P. and Malena, M. and Malomo, D. and Pellegrini, D. and Pena, F. and Petracca, M. and Pintucchi, B. and Portioli, F.P.A. and Pulatsu, B. and Ramaglia, G. and Rapicavoli, D. and Trovatelli, F.},\nvolume = {18},\nnumber = {12},\nyear = {2024},\npages = {1825 - 1851},\nissn = {15583058},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents the results of the blind test competition carried out within the scope of the European project SERA.ta "Seismic Response of Masonry Cross Vaults: Shaking table tests and numerical validations". The purpose of the competition was to predict the results of a set of tests carried out on an unstrengthened full-scale cross vault with mortar joints and solid bricks (then strengthened with textile reinforced mortar) subjected to a horizontal dynamic excitation. The paper offers an overview of the modelling approaches utilised, along with their corresponding predictions and post dictions. The findings are assessed based on both the damage mechanisms and predicted values for displacements and accelerations in both directions. The results are then compared with the experimental findings. Modelling approaches utilizing the Finite Element Method (FEM) yielded the most accurate predictions regarding displacements and crack patterns. Conversely, a submission employing a Discrete Element model provided the most accurate prediction of damage mechanisms. Nonetheless, the significant discrepancies in predicted displacements and accelerations underscore the necessity for continued efforts to establish consensus on appropriate modelling assumptions for masonry vaults.<br/></div> © 2024 Taylor & Francis Group, LLC.},\nkey = {Mortar},\n%keywords = {Brick;Brick construction;Digital elevation model;Prediction models;Retrofitting;Seismic response;},\n%note = {Accurate prediction;Blind prediction-postdiction;Blind predictions;Damage mechanism;Masonry model;Masonry vaults;Modeling approach;Seismic retrofitting;Shake table testing;Shaking table tests;},\nURL = {http://dx.doi.org/10.1080/15583058.2024.2419545},\n} \n\n\n
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This paper presents the results of the blind test competition carried out within the scope of the European project SERA.ta \"Seismic Response of Masonry Cross Vaults: Shaking table tests and numerical validations\". The purpose of the competition was to predict the results of a set of tests carried out on an unstrengthened full-scale cross vault with mortar joints and solid bricks (then strengthened with textile reinforced mortar) subjected to a horizontal dynamic excitation. The paper offers an overview of the modelling approaches utilised, along with their corresponding predictions and post dictions. The findings are assessed based on both the damage mechanisms and predicted values for displacements and accelerations in both directions. The results are then compared with the experimental findings. Modelling approaches utilizing the Finite Element Method (FEM) yielded the most accurate predictions regarding displacements and crack patterns. Conversely, a submission employing a Discrete Element model provided the most accurate prediction of damage mechanisms. Nonetheless, the significant discrepancies in predicted displacements and accelerations underscore the necessity for continued efforts to establish consensus on appropriate modelling assumptions for masonry vaults.
© 2024 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n Modeling the Time-Dependent Variation of Road Salt Concentrations Using Analytical and Machine-Learning Approaches to Advance Service Life Predictions for Concrete Structures.\n \n \n \n \n\n\n \n Khani, S.; Conciatori, D.; and Chouinard, L.\n\n\n \n\n\n\n Transportation Research Record. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ModelingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20244617368276 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modeling the Time-Dependent Variation of Road Salt Concentrations Using Analytical and Machine-Learning Approaches to Advance Service Life Predictions for Concrete Structures},\njournal = {Transportation Research Record},\nauthor = {Khani, Samaneh and Conciatori, David and Chouinard, Luc},\nyear = {2024},\nissn = {03611981},\nabstract = {<div data-language="eng" data-ev-field="abstract">The exposure of concrete structures to environmental and climatic conditions is detrimental to their durability. In northern climates, the key contributor to their degradation is corrosion of the reinforcing steel because of chloride ions originating from de-icing salts applied on roadways during the winter season. In consequence, a key input parameter for predicting the time to the initiation of corrosion for concrete elements is the time history of the concentration of chloride ions at their surfaces. To investigate this issue, a specialized mobile monitoring station was deployed along a roadway over several winter seasons to collect data on salting operations, weather conditions, and the temporal variation of chloride ion levels on the roadway. At first, salting operations were monitored, and then exploratory and machine-learning algorithms were applied to develop relationships between weather conditions, road conditions, and chloride ion concentrations. The first proposed model is based on the simulation modeling approach, while the second is based on the machine-learning XGBoost model. The findings demonstrate that both models can predict the variation of salt concentration on the road surface as a function of time after a salting operation. By accounting for the time dependency of surface chloride in service life models, more accurate predictions of corrosion initiation time are possible, since the rate of penetration of chloride ions is highly dependent on wetting/drying cycles throughout the winter.<br/></div> © The Author(s) 2024.},\nkey = {Concrete buildings},\n%keywords = {Advanced traffic management systems;Atmospheric corrosion;Concrete beams and girders;Corrosion rate;Highway administration;Highway traffic control;Motor transportation;Street traffic control;Structural health monitoring;},\n%note = {Chloride;Chloride ions;Durability of concretes;Highway monitoring data;Highway traffic;Highway traffic monitoring;Infrastructure;Operation;Salt concentration;Traffic monitoring;},\nURL = {http://dx.doi.org/10.1177/03611981241284616},\n} \n\n\n
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The exposure of concrete structures to environmental and climatic conditions is detrimental to their durability. In northern climates, the key contributor to their degradation is corrosion of the reinforcing steel because of chloride ions originating from de-icing salts applied on roadways during the winter season. In consequence, a key input parameter for predicting the time to the initiation of corrosion for concrete elements is the time history of the concentration of chloride ions at their surfaces. To investigate this issue, a specialized mobile monitoring station was deployed along a roadway over several winter seasons to collect data on salting operations, weather conditions, and the temporal variation of chloride ion levels on the roadway. At first, salting operations were monitored, and then exploratory and machine-learning algorithms were applied to develop relationships between weather conditions, road conditions, and chloride ion concentrations. The first proposed model is based on the simulation modeling approach, while the second is based on the machine-learning XGBoost model. The findings demonstrate that both models can predict the variation of salt concentration on the road surface as a function of time after a salting operation. By accounting for the time dependency of surface chloride in service life models, more accurate predictions of corrosion initiation time are possible, since the rate of penetration of chloride ions is highly dependent on wetting/drying cycles throughout the winter.
© The Author(s) 2024.\n
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\n \n\n \n \n \n \n \n \n Bearing Capacity Estimation in Nonlinear Granular Deposits under Reduced Gravity Field: Lunar Applications.\n \n \n \n \n\n\n \n Chenari, R. J.; and Maghoul, P.\n\n\n \n\n\n\n In pages 785 - 793, Miami, FL, United states, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"BearingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20244517317371 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Bearing Capacity Estimation in Nonlinear Granular Deposits under Reduced Gravity Field: Lunar Applications},\njournal = {Earth and Space 2024: Engineering for Extreme Environments - Proceedings of the 19th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments},\nauthor = {Chenari, Reza Jamshidi and Maghoul, Pooneh},\nyear = {2024},\npages = {785 - 793},\naddress = {Miami, FL, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Conventional estimation of bearing capacity relies on cohesion, unit weight, and overburden pressure. In granular materials, gravity has a dual influence on bearing capacity. The first contribution comes from passive resistance, which is influenced by the weight of the foundation soil. Additionally, gravity indirectly affects the load-bearing behavior of granular soils by influencing the stress-dependent stiffness and strength parameters. Despite the lack of comprehensive research into the constitutive behavior of lunar soils, it can be assumed that the frictional lunar surface soils may exhibit nonlinear behavior, influenced by stress. This study aims to explore this effect by using the finite difference method analyses. It assumes a stress-dependent nonlinearity for the foundation soil while reducing the gravity level to one-sixth of Earth’s. The results show how estimating bearing capacity on lunar soil might differ from terrestrial contexts and offer insights into adjusting conventional bearing capacity equations for lunar construction purposes.<br/></div> © ASCE.},\nkey = {Lunar surface analysis},\n%keywords = {Friction;Nonlinear analysis;Residual stresses;Tropics;},\n%note = {Capacity estimation;Foundation soils;Granular deposits;Gravity field;Lunar applications;Lunar soil;Overburden pressures;Reduced gravity;Stress-dependent;Unit weight;},\nURL = {http://dx.doi.org/10.1061/9780784485736.070},\n} \n\n\n
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Conventional estimation of bearing capacity relies on cohesion, unit weight, and overburden pressure. In granular materials, gravity has a dual influence on bearing capacity. The first contribution comes from passive resistance, which is influenced by the weight of the foundation soil. Additionally, gravity indirectly affects the load-bearing behavior of granular soils by influencing the stress-dependent stiffness and strength parameters. Despite the lack of comprehensive research into the constitutive behavior of lunar soils, it can be assumed that the frictional lunar surface soils may exhibit nonlinear behavior, influenced by stress. This study aims to explore this effect by using the finite difference method analyses. It assumes a stress-dependent nonlinearity for the foundation soil while reducing the gravity level to one-sixth of Earth’s. The results show how estimating bearing capacity on lunar soil might differ from terrestrial contexts and offer insights into adjusting conventional bearing capacity equations for lunar construction purposes.
© ASCE.\n
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\n \n\n \n \n \n \n \n \n Topological Interlocking Bricks for Habitat Construction in Extraterrestrial Environments.\n \n \n \n \n\n\n \n Mathieu, M.; Abdulrazagh, P. H.; Jablonski, A. M.; and Maghoul, P.\n\n\n \n\n\n\n In pages 858 - 867, Miami, FL, United states, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"TopologicalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20244517317377 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Topological Interlocking Bricks for Habitat Construction in Extraterrestrial Environments},\njournal = {Earth and Space 2024: Engineering for Extreme Environments - Proceedings of the 19th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments},\nauthor = {Mathieu, Maelle and Abdulrazagh, Parisa Haji and Jablonski, Alexander M. and Maghoul, Pooneh},\nyear = {2024},\npages = {858 - 867},\naddress = {Miami, FL, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">As NASA and other space agencies prepare for a sustained return of humans to the Moon, one key focus area pertains to the challenges of constructing resilient habitats in space. Traditional approaches suggest using robots for single-pass 3D printing of entire habitats, yet this method is constrained by the size limitations of the robots themselves. In this paper, we propose an adaptable and modular approach for human habitat construction based on topological interlocking bricks. These 3D-printed structural elements are designed with specially shaped elements that lock together in such a way to offer enhanced resilience and modularity compared to conventional methods. However, the development of extraterrestrial structures requires a consideration of the extreme environmental conditions, the use of in situ resources and on situ fabrication capabilities. We conducted a review of environmental conditions on the Moon to provide useful information regarding structural requirements, available materials, and fabrication methods. We presented various topological interlocking systems and evaluated different assemblies under lunar gravity to recommend an ideal solution for different types of lunar structures.<br/></div> © ASCE.},\nkey = {NASA},\n%keywords = {Brick;Brick construction;Tropics;},\n%note = {3-D printing;3D-printing;Environmental conditions;Extraterrestrial environments;Focus areas;Single pass;Space agency;Topological interlocking;Traditional approaches;Traditional approachs;},\nURL = {http://dx.doi.org/10.1061/9780784485736.076},\n} \n\n\n
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As NASA and other space agencies prepare for a sustained return of humans to the Moon, one key focus area pertains to the challenges of constructing resilient habitats in space. Traditional approaches suggest using robots for single-pass 3D printing of entire habitats, yet this method is constrained by the size limitations of the robots themselves. In this paper, we propose an adaptable and modular approach for human habitat construction based on topological interlocking bricks. These 3D-printed structural elements are designed with specially shaped elements that lock together in such a way to offer enhanced resilience and modularity compared to conventional methods. However, the development of extraterrestrial structures requires a consideration of the extreme environmental conditions, the use of in situ resources and on situ fabrication capabilities. We conducted a review of environmental conditions on the Moon to provide useful information regarding structural requirements, available materials, and fabrication methods. We presented various topological interlocking systems and evaluated different assemblies under lunar gravity to recommend an ideal solution for different types of lunar structures.
© ASCE.\n
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\n \n\n \n \n \n \n \n \n LIBS-Raman Multimodal Architecture for Automated Lunar Prospecting.\n \n \n \n \n\n\n \n Pigeon, J.; Khomh, F.; Boudreault, R.; Ashraf, A.; and Maghoul, P.\n\n\n \n\n\n\n In pages 209 - 219, Miami, FL, United states, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"LIBS-RamanPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20244517317290 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {LIBS-Raman Multimodal Architecture for Automated Lunar Prospecting},\njournal = {Earth and Space 2024: Engineering for Extreme Environments - Proceedings of the 19th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments},\nauthor = {Pigeon, Jerome and Khomh, Foutse and Boudreault, Richard and Ashraf, Ahmed and Maghoul, Pooneh},\nyear = {2024},\npages = {209 - 219},\naddress = {Miami, FL, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">A fundamental aspect of contemporary space programs revolves around optimizing the use of lunar in situ resources, known as In Situ Resources Utilization (ISRU). This strategy has the potential to significantly cut down the immense energy requirements for human space exploration and, equally important, reduce the costs associated with launching satellites into orbit. However, the Moon is largely unexplored from a resource standpoint and needs high-resolution instruments to assess the resource concentration as well as the nature of a sample. Given the vastness of the lunar (sub)surface exploration area and its complexity, a diverse array of instruments is required to establish an efficient and autonomous system for characterizing lunar regolith. This paper aims to propose a multimodal machine learning model developed to identify minerals using Raman spectroscopy and laser-induced breakdown spectroscopy (LIBS) instruments based on a multimodal fusion architecture.<br/></div> © ASCE.},\nkey = {Space research},\n%keywords = {Atomic emission spectroscopy;Mineral exploration;Tropics;},\n%note = {Energy requirements;High resolution instruments;Human space explorations;In-situ resource utilizations;In-situ resources;Laserinduced breakdown spectroscopy (LIBS);Multimodal architectures;Space programs;Sub-surfaces;Surface exploration;},\nURL = {http://dx.doi.org/10.1061/9780784485736.019},\n} \n\n\n
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A fundamental aspect of contemporary space programs revolves around optimizing the use of lunar in situ resources, known as In Situ Resources Utilization (ISRU). This strategy has the potential to significantly cut down the immense energy requirements for human space exploration and, equally important, reduce the costs associated with launching satellites into orbit. However, the Moon is largely unexplored from a resource standpoint and needs high-resolution instruments to assess the resource concentration as well as the nature of a sample. Given the vastness of the lunar (sub)surface exploration area and its complexity, a diverse array of instruments is required to establish an efficient and autonomous system for characterizing lunar regolith. This paper aims to propose a multimodal machine learning model developed to identify minerals using Raman spectroscopy and laser-induced breakdown spectroscopy (LIBS) instruments based on a multimodal fusion architecture.
© ASCE.\n
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\n \n\n \n \n \n \n \n \n The Effect of Bending Vibration Modes on Penetration of Bio-Inspired Drilling Tool in Granular Materials: An Experimental Study.\n \n \n \n \n\n\n \n Varnosfaderani, M. A.; Maghoul, P.; and Wu, N.\n\n\n \n\n\n\n In pages 355 - 363, Miami, FL, United states, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20244517317304 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {The Effect of Bending Vibration Modes on Penetration of Bio-Inspired Drilling Tool in Granular Materials: An Experimental Study},\njournal = {Earth and Space 2024: Engineering for Extreme Environments - Proceedings of the 19th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments},\nauthor = {Varnosfaderani, Mahdi Alaei and Maghoul, Pooneh and Wu, Nan},\nyear = {2024},\npages = {355 - 363},\naddress = {Miami, FL, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Conventional drilling tools used on Earth are impractical for lunar subsurface exploration due to payload limitations. To overcome this, high-frequency vibration can be employed to reduce the soil penetration resistance and develop a more compact drilling tool for remote subsurface investigations. Therefore, this study aims to investigate the effects of bending vibrations to facilitate probe penetration into granular materials. We attached piezo patches to the probe and conducted experimental modal analyses to determine resonance frequencies. The probe was then inserted into different granular materials, with and without lateral vibrations and corresponding vertical penetration forces were measured. Our test results demonstrate that bending vibration modes significantly reduce the vertical force required for probe insertion into granular soil samples.<br/></div> © ASCE.},\nkey = {Probes},\n%keywords = {Bending tools;Drilling machines (machine tools);Machine vibrations;Soil testing;Tropics;Vibration analysis;},\n%note = {Bending vibrations;Conventional drilling;Drilling tool;Experimental modal analysis;High-frequency vibrations;Probe penetration;Soil penetration resistance;Subsurface exploration;Subsurface investigations;Vibration modes;},\nURL = {http://dx.doi.org/10.1061/9780784485736.033},\n} \n\n\n
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\n
Conventional drilling tools used on Earth are impractical for lunar subsurface exploration due to payload limitations. To overcome this, high-frequency vibration can be employed to reduce the soil penetration resistance and develop a more compact drilling tool for remote subsurface investigations. Therefore, this study aims to investigate the effects of bending vibrations to facilitate probe penetration into granular materials. We attached piezo patches to the probe and conducted experimental modal analyses to determine resonance frequencies. The probe was then inserted into different granular materials, with and without lateral vibrations and corresponding vertical penetration forces were measured. Our test results demonstrate that bending vibration modes significantly reduce the vertical force required for probe insertion into granular soil samples.
© ASCE.\n
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\n \n\n \n \n \n \n \n \n Proposal for Benchmark Problems to Assess Spillway and Overtopped Dams Structural Stability Using CFD.\n \n \n \n \n\n\n \n Freitas, M.; Leger, P.; and Pedroso, L.\n\n\n \n\n\n\n In volume 503 LNCE, pages 237 - 250, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"ProposalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20244417277534 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Proposal for Benchmark Problems to Assess Spillway and Overtopped Dams Structural Stability Using CFD},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Freitas, Mario and Leger, Pierre and Pedroso, Lineu},\nvolume = {503 LNCE},\nyear = {2024},\npages = {237 - 250},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Extreme floods are one of the most significant threats to the structural stability of hydraulic gravity structures. The water flow conditions, including the related pressure fields and resultant forces, of overtopped gravity dams and spillways are difficult to accurately quantify. Recent advances in CFD (Computational Fluid Dynamics) have made this approach an attractive alternative to physical models. However, prior to using CFD with confidence one has to establish its accuracy in terms of (i) the computational domain and boundary conditions, (ii) the mesh type and refinement, and (iii) the turbulence model. Four benchmarks are proposed herein to evaluate the accuracy of CFD models to assess the condition of overtopped hydraulic structures. The first benchmark compares the nappe trajectories and pressure fields with empirical data from standard ogee spillways. A minimum level of mesh refinement is necessary to achieve convergence of the vertical and horizontal components of the hydrodynamic loads. The second benchmark uses a rectangular crest spillway to study the aeration of a free-falling nappe. Two methods to achieve aeration are compared: adding a pressure outlet to the downstream wall of the spillway in a 2D model and broadening the domain on the downstream portion of a 3D model. Both strategies accurately capture the trajectory, streamlines, and pressure fields compared to experimental results. However, the 2D strategy, while being less computationally expensive, requires prior knowledge of the aeration boundary location. The third benchmark evaluates the accuracy in modelling the profile of a free-falling water stream by integrating the volume fraction of a control volume to obtain its total water mass. That is then compared against an analytical solution. An adaptative refinement around the interface between water and air is required to converge to the analytical solution. The fourth benchmark combines the lessons learned from the previous three into the problem of an overtopped gravity dam section. The numerical results are compared against analytical and empirical estimates. Adequate mesh refinement and boundary conditions are necessary to capture the hydrodynamic forces. By solving these four benchmarks, one would be able to adjust their CFD models to confidently simulate overtopping of hydraulic structures.<br/></div> © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.},\nkey = {Computational fluid dynamics},\n%keywords = {Aerodynamics;Benchmarking;Flow of water;Gravity dams;Hydrodynamics;Mesh generation;Rivers;Spillway gates;Water aeration;},\n%note = {Computational fluid;Computational fluid dynamics modeling;Condition;Down-stream;Fluid-dynamics;Mesh refinement;Overtopping;Pressure-field;Structural stabilities;Trajectory field;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61519-1_17},\n} \n\n\n
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\n
Extreme floods are one of the most significant threats to the structural stability of hydraulic gravity structures. The water flow conditions, including the related pressure fields and resultant forces, of overtopped gravity dams and spillways are difficult to accurately quantify. Recent advances in CFD (Computational Fluid Dynamics) have made this approach an attractive alternative to physical models. However, prior to using CFD with confidence one has to establish its accuracy in terms of (i) the computational domain and boundary conditions, (ii) the mesh type and refinement, and (iii) the turbulence model. Four benchmarks are proposed herein to evaluate the accuracy of CFD models to assess the condition of overtopped hydraulic structures. The first benchmark compares the nappe trajectories and pressure fields with empirical data from standard ogee spillways. A minimum level of mesh refinement is necessary to achieve convergence of the vertical and horizontal components of the hydrodynamic loads. The second benchmark uses a rectangular crest spillway to study the aeration of a free-falling nappe. Two methods to achieve aeration are compared: adding a pressure outlet to the downstream wall of the spillway in a 2D model and broadening the domain on the downstream portion of a 3D model. Both strategies accurately capture the trajectory, streamlines, and pressure fields compared to experimental results. However, the 2D strategy, while being less computationally expensive, requires prior knowledge of the aeration boundary location. The third benchmark evaluates the accuracy in modelling the profile of a free-falling water stream by integrating the volume fraction of a control volume to obtain its total water mass. That is then compared against an analytical solution. An adaptative refinement around the interface between water and air is required to converge to the analytical solution. The fourth benchmark combines the lessons learned from the previous three into the problem of an overtopped gravity dam section. The numerical results are compared against analytical and empirical estimates. Adequate mesh refinement and boundary conditions are necessary to capture the hydrodynamic forces. By solving these four benchmarks, one would be able to adjust their CFD models to confidently simulate overtopping of hydraulic structures.
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.\n
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\n \n\n \n \n \n \n \n \n Bond between single and bundled high-modulus ribbed GFRP bars with short embedment lengths and concrete.\n \n \n \n \n\n\n \n Habibi, O.; Asadian, A.; and Galal, K.\n\n\n \n\n\n\n Advances in Structural Engineering. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"BondPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20244317248877 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Bond between single and bundled high-modulus ribbed GFRP bars with short embedment lengths and concrete},\njournal = {Advances in Structural Engineering},\nauthor = {Habibi, Omid and Asadian, Alireza and Galal, Khaled},\nyear = {2024},\nissn = {13694332},\nabstract = {<div data-language="eng" data-ev-field="abstract">The bond between glass fiber-reinforced polymer (GFRP) rebar and concrete is one of the most important parameters in the design of GFRP-reinforced structures. This study investigates the bond behavior of single and bundled high-modulus ribbed GFRP rebars with short embedment lengths in concrete. To achieve this, a total of 48 pullout specimens were constructed and tested. The effect of various parameters, including GFRP rebar embedded length, the concrete block dimensions, GFRP surface characteristics, presence of transverse reinforcement, and bundling of rebars on the bond behavior of high-modulus ribbed GFRP rebar was studied. The experimental results indicated that the failure mode changed from pullout to splitting failure as the embedment length increased. The presence of transverse reinforcement, in many cases, changed brittle splitting failure to partial splitting failure followed by pullout failure. The variation in rebar surface characteristics resulted in differences in the bond-slip behavior of GFRP rebar in concrete. The experimental findings illustrated that rebar stress at failure for specimens with bundled GFRP was generally higher than that of corresponding individual bar with approximately same cross-sectional area. This observation suggests that the equivalent area method may serve as a conservative approach for evaluating the embedment length of bundled ribbed GFRP rebars. Furthermore, the adhesion between ribbed GFRP rebars and concrete was quantified for various bar sizes. Finally, the experimental results were employed to refine and calibrate existing bond-slip models of ribbed GFRP rebar to concrete.<br/></div> © The Author(s) 2024.},\n%keywords = {Bond strength (materials);Concrete blocks;Elastomers;Fiber reinforced concrete;Fracture mechanics;Glass fiber reinforced plastics;Glass fibers;High modulus textile fibers;Rebar;Slip forming;},\n%note = {Bond strength;Bond-slip models;Bundling;Embedment length;Glass fiber-reinforced polymer rebar;Glassfiber reinforced polymers (GFRP);Polymer concretes;Polymer rebars;Splitting failure;Transverse reinforcement;},\nURL = {http://dx.doi.org/10.1177/13694332241291251},\n} \n\n\n
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The bond between glass fiber-reinforced polymer (GFRP) rebar and concrete is one of the most important parameters in the design of GFRP-reinforced structures. This study investigates the bond behavior of single and bundled high-modulus ribbed GFRP rebars with short embedment lengths in concrete. To achieve this, a total of 48 pullout specimens were constructed and tested. The effect of various parameters, including GFRP rebar embedded length, the concrete block dimensions, GFRP surface characteristics, presence of transverse reinforcement, and bundling of rebars on the bond behavior of high-modulus ribbed GFRP rebar was studied. The experimental results indicated that the failure mode changed from pullout to splitting failure as the embedment length increased. The presence of transverse reinforcement, in many cases, changed brittle splitting failure to partial splitting failure followed by pullout failure. The variation in rebar surface characteristics resulted in differences in the bond-slip behavior of GFRP rebar in concrete. The experimental findings illustrated that rebar stress at failure for specimens with bundled GFRP was generally higher than that of corresponding individual bar with approximately same cross-sectional area. This observation suggests that the equivalent area method may serve as a conservative approach for evaluating the embedment length of bundled ribbed GFRP rebars. Furthermore, the adhesion between ribbed GFRP rebars and concrete was quantified for various bar sizes. Finally, the experimental results were employed to refine and calibrate existing bond-slip models of ribbed GFRP rebar to concrete.
© The Author(s) 2024.\n
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\n \n\n \n \n \n \n \n \n Exploring the seismic performance of corroded RC frames with masonry infills.\n \n \n \n \n\n\n \n Liu, J.; Scattarreggia, N.; and Malomo, D.\n\n\n \n\n\n\n Bulletin of Earthquake Engineering. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ExploringPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20244317232327 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Exploring the seismic performance of corroded RC frames with masonry infills},\njournal = {Bulletin of Earthquake Engineering},\nauthor = {Liu, Jiadaren and Scattarreggia, Nicola and Malomo, Daniele},\nyear = {2024},\nissn = {1570761X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Reinforced concrete (RC) frames infilled with unreinforced masonry panels are widely used worldwide and represent a prevalent structural typology in several earthquake-prone regions. A large amount of existing RC building stocks in seismically active countries, however, were erected more than 50 years ago with substandard materials, construction practices, and outdated design guidelines, and have likely exceeded their service life limit. Aging RC structures are also particularly vulnerable to environment-induced degradation (including corrosion), increasingly relevant due to climate change, which is projected to further reduce their already compromised seismic performance. Although extensive studies in the last decades highlighted the importance of considering the presence of masonry infills in the assessment of existing RC buildings subjected to earthquake loading, limited investigations are available on the seismic response of such systems when reinforcement corrosion is considered. In addition, as corroded RC frames typically exhibit reduced ultimate displacement, ductility and base shear capacities, it is expected that distinct frame-infill interaction mechanisms would govern under corroded and uncorroded scenarios. Conducting laboratory tests on corroded RC frames with masonry infills, however, is challenging and sometimes even impractical due to technical difficulties and time constraints. In this paper, fiber-based finite element (FE) models were developed to investigate the impact of corrosion on the seismic performance of RC frames with masonry infills at different scales. First, the developed FE models were validated against quasi-static and dynamic experimental tests on intact RC columns and infilled RC frames without corrosion effects. Then, calibrated FE models were validated against experimental tests on isolated RC columns with various degrees of corrosion. Simplified modelling strategies, also applicable in engineering practice, were adopted and validated to account for corrosion-induced damage numerically. Finally, the validated FE models were used to investigate the corrosion-induced degradation of seismic response for corroded RC infills and building assemblies. Results obtained indicate that the presence of infills may not only increase the load bearing and drift control capacities of intact RC frames, but can also improve the structural performance of corroded RC frames, especially in case of strong masonry panels. Corrosion-induced lateral strength capacity loss of bare frames can be up to 8 times larger than that of infilled frames.<br/></div> © The Author(s), under exclusive licence to Springer Nature B.V. 2024.},\nkey = {Reinforced concrete},\n%keywords = {Atmospheric corrosion;Bearings (structural);Columns (structural);Concrete slabs;Corrosive effects;Earthquake effects;Induced Seismicity;Mortar;Retaining walls;Seismic design;Seismic response;Shotcrete;Structural frames;Structural panels;},\n%note = {Existing reinforced concrete;Experimental test;Finite element modelling (FEM);Masonry infills;Masonry panels;Reinforced concrete buildings;Reinforced concrete column;Reinforced concrete frames;Reinforcement corrosion;Seismic Performance;},\nURL = {http://dx.doi.org/10.1007/s10518-024-02037-1},\n} \n\n\n
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Reinforced concrete (RC) frames infilled with unreinforced masonry panels are widely used worldwide and represent a prevalent structural typology in several earthquake-prone regions. A large amount of existing RC building stocks in seismically active countries, however, were erected more than 50 years ago with substandard materials, construction practices, and outdated design guidelines, and have likely exceeded their service life limit. Aging RC structures are also particularly vulnerable to environment-induced degradation (including corrosion), increasingly relevant due to climate change, which is projected to further reduce their already compromised seismic performance. Although extensive studies in the last decades highlighted the importance of considering the presence of masonry infills in the assessment of existing RC buildings subjected to earthquake loading, limited investigations are available on the seismic response of such systems when reinforcement corrosion is considered. In addition, as corroded RC frames typically exhibit reduced ultimate displacement, ductility and base shear capacities, it is expected that distinct frame-infill interaction mechanisms would govern under corroded and uncorroded scenarios. Conducting laboratory tests on corroded RC frames with masonry infills, however, is challenging and sometimes even impractical due to technical difficulties and time constraints. In this paper, fiber-based finite element (FE) models were developed to investigate the impact of corrosion on the seismic performance of RC frames with masonry infills at different scales. First, the developed FE models were validated against quasi-static and dynamic experimental tests on intact RC columns and infilled RC frames without corrosion effects. Then, calibrated FE models were validated against experimental tests on isolated RC columns with various degrees of corrosion. Simplified modelling strategies, also applicable in engineering practice, were adopted and validated to account for corrosion-induced damage numerically. Finally, the validated FE models were used to investigate the corrosion-induced degradation of seismic response for corroded RC infills and building assemblies. Results obtained indicate that the presence of infills may not only increase the load bearing and drift control capacities of intact RC frames, but can also improve the structural performance of corroded RC frames, especially in case of strong masonry panels. Corrosion-induced lateral strength capacity loss of bare frames can be up to 8 times larger than that of infilled frames.
© The Author(s), under exclusive licence to Springer Nature B.V. 2024.\n
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\n \n\n \n \n \n \n \n \n Mechanical Properties of Stud Connectors in Composite Beams with Precast Concrete Hollow Core Slabs.\n \n \n \n \n\n\n \n Aghdam, P. P.; Parent, S.; Dinehart, D. W.; and Roy, N.\n\n\n \n\n\n\n In volume 507 LNCE, pages 269 - 283, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"MechanicalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20243917080467 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Mechanical Properties of Stud Connectors in Composite Beams with Precast Concrete Hollow Core Slabs},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Aghdam, Parinaz Panjehbashi and Parent, Serge and Dinehart, David W. and Roy, Nathalie},\nvolume = {507 LNCE},\nyear = {2024},\npages = {269 - 283},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Composite steel beams with precast concrete hollow core (PCHC) slabs are widely used to construct multistory long-span structures. PCHC slabs are commonly manufactured by extrusion or slip-formworks using concrete with very low workability. Initially provided with circular voids, their sections have been improved in the last decades using a kind of ellipsoidal voids and pre-stressed concrete. Compared to solid concrete slabs, PCHC slabs are more light-weighted, cost-effective, easy to install, fire resistant, and have better thermal insulation. Shear connectors ensure the longitudinal shear transfer between the concrete slab and the steel beam in conventional composite beams with solid concrete slabs. In order to quantify the composite behaviour between the steel beam and the concrete slab, it is of great importance to determine the shear stud stiffness and strength values. However, limited studies investigate the mechanical properties of the shear studs in composite beams with PCHC slabs. This paper conducted pushout tests on five full-scale composite beams of 254 mm depth PCHC slabs connected to the steel beam via 19-mm diameter connectors. The shear stud configurations were varied. The effect of cyclic loading on the failure mode was studied. The shear stud strength and load-slip diagrams were investigated by varying the compressive strength of the concrete cover under monotonic and cyclic loading. Also, a finite element (FE) model was developed and calibrated based on the experimental results. The parametric FE analyses were performed to investigate the effect of the shear stud diameter and concrete compressive strength on the shear stud capacity. The experimental and numerical study results showed that the specimens with a three-shear stud layout performed better than those with a two-shear stud layout. Also, the cyclic loading resulted in a 15% lower maximum shear stud capacity than the corresponding monotonic loading.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Thermal insulation},\n%keywords = {Brain computer interface;Composite beams and girders;Compressive strength;Concrete beams and girders;Concrete slabs;Cyclic loads;Dynamic response;Fireproofing;Flame resistance;Fracture mechanics;Hydroelasticity;Prestressed concrete;Shear strength;Slip forming;Steel beams and girders;Stud welding;Studs (fasteners);Studs (structural members);},\n%note = {Composite construction;Composite interactions;Cyclic loading;Finite element;Hollow-core slabs;Pre-cast;Precast concrete hollow core slab;Pushouts;Shear connector;Stud connectors;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61539-9_22},\n} \n\n\n
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Composite steel beams with precast concrete hollow core (PCHC) slabs are widely used to construct multistory long-span structures. PCHC slabs are commonly manufactured by extrusion or slip-formworks using concrete with very low workability. Initially provided with circular voids, their sections have been improved in the last decades using a kind of ellipsoidal voids and pre-stressed concrete. Compared to solid concrete slabs, PCHC slabs are more light-weighted, cost-effective, easy to install, fire resistant, and have better thermal insulation. Shear connectors ensure the longitudinal shear transfer between the concrete slab and the steel beam in conventional composite beams with solid concrete slabs. In order to quantify the composite behaviour between the steel beam and the concrete slab, it is of great importance to determine the shear stud stiffness and strength values. However, limited studies investigate the mechanical properties of the shear studs in composite beams with PCHC slabs. This paper conducted pushout tests on five full-scale composite beams of 254 mm depth PCHC slabs connected to the steel beam via 19-mm diameter connectors. The shear stud configurations were varied. The effect of cyclic loading on the failure mode was studied. The shear stud strength and load-slip diagrams were investigated by varying the compressive strength of the concrete cover under monotonic and cyclic loading. Also, a finite element (FE) model was developed and calibrated based on the experimental results. The parametric FE analyses were performed to investigate the effect of the shear stud diameter and concrete compressive strength on the shear stud capacity. The experimental and numerical study results showed that the specimens with a three-shear stud layout performed better than those with a two-shear stud layout. Also, the cyclic loading resulted in a 15% lower maximum shear stud capacity than the corresponding monotonic loading.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Behaviour of Slip-Critical Shear Connectors Between Multi-void Extruded Aluminium Bridge Decks and Steel Girders.\n \n \n \n \n\n\n \n Annan, C.; Charron-Drolet, D.; and Fafard, M.\n\n\n \n\n\n\n In volume 507 LNCE, pages 165 - 173, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"BehaviourPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20243917080459 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Behaviour of Slip-Critical Shear Connectors Between Multi-void Extruded Aluminium Bridge Decks and Steel Girders},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Annan, Charles-Darwin and Charron-Drolet, Daniel and Fafard, Mario},\nvolume = {507 LNCE},\nyear = {2024},\npages = {165 - 173},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The use of aluminium alloys for bridge decks has gained significant interest in recent years due to the material’s high strength-to-weight ratio, durability (i.e. high resistance to atmospheric corrosion), and low maintenance requirements compared to the traditional deck material such as reinforced concrete. Moreover, the material’s extrudability property provides designers with the ability to optimize sections by placing the material in areas that maximize structural properties and joinability. For roadway bridge applications, one of the most practical and cost-effective solutions consists of aluminium deck panels, made from welded multi-void extrusions and supported on steel I-girders. In the traditional deck-on-girder bridge design, it is desirable to develop a slip-resistant connection between the bridge deck and the supporting girders to avoid unexpected instability due to fatigue or vibrations. Developing a slip-resistant joint between hollow aluminium deck panels and steel I-girders presents unique challenges, including a lack of access to the interior of the deck panel for the installation of pretensioned bolts and the behaviour of dissimilar metals under mechanical and thermal loads. In the present study, the suitability of a commercial blind bolt type was examined by testing a steel–aluminium plate assembly to evaluate the slip and relaxation characteristics of the joint at ambient temperature. Results of the study indicate that the use of the selected blind bolt is suitable for a slip-resistant aluminium–steel joint. The rapid initial joint relaxation can be reduced significantly by retightening the bolts, 24 h after initial installation.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Atmospheric corrosion},\n%keywords = {Ability testing;Aluminum beams and girders;Aluminum bridges;Aluminum coated steel;Aluminum corrosion;Bridge decks;Corrosion resistance;High temperature corrosion;Highway bridges;Plate girder bridges;Steel beams and girders;Steel bridges;Steel corrosion;Steel testing;},\n%note = {Blind bolt;Deck girders;Deck panel;Extruded aluminum;Extruded multi-void aluminum deck;Property;Shear connector;Slip-resistant joint;Steel girder;Steel I-girder;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61539-9_14},\n} \n\n\n
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The use of aluminium alloys for bridge decks has gained significant interest in recent years due to the material’s high strength-to-weight ratio, durability (i.e. high resistance to atmospheric corrosion), and low maintenance requirements compared to the traditional deck material such as reinforced concrete. Moreover, the material’s extrudability property provides designers with the ability to optimize sections by placing the material in areas that maximize structural properties and joinability. For roadway bridge applications, one of the most practical and cost-effective solutions consists of aluminium deck panels, made from welded multi-void extrusions and supported on steel I-girders. In the traditional deck-on-girder bridge design, it is desirable to develop a slip-resistant connection between the bridge deck and the supporting girders to avoid unexpected instability due to fatigue or vibrations. Developing a slip-resistant joint between hollow aluminium deck panels and steel I-girders presents unique challenges, including a lack of access to the interior of the deck panel for the installation of pretensioned bolts and the behaviour of dissimilar metals under mechanical and thermal loads. In the present study, the suitability of a commercial blind bolt type was examined by testing a steel–aluminium plate assembly to evaluate the slip and relaxation characteristics of the joint at ambient temperature. Results of the study indicate that the use of the selected blind bolt is suitable for a slip-resistant aluminium–steel joint. The rapid initial joint relaxation can be reduced significantly by retightening the bolts, 24 h after initial installation.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Extraction of Bolt Shear Forces in Bolted Connections Using Finite Element Method.\n \n \n \n \n\n\n \n Aram, A. B.; and Rogers, C. A.\n\n\n \n\n\n\n In volume 505 LNCE, pages 225 - 238, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"ExtractionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20244217189768 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Extraction of Bolt Shear Forces in Bolted Connections Using Finite Element Method},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Aram, Ahmad Bou and Rogers, Colin A.},\nvolume = {505 LNCE},\nyear = {2024},\npages = {225 - 238},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The CSA S16 and the AISC 360 standards, and various bolt shear studies, are consistent in their assumption that a uniform distribution of applied force exists for short-bolted connections. However, a recent study at McGill University on conventionally constructed braced frames (CCBFs) reported that the shear force was distributed nonuniformly between the bolt group even though the connections were short. Based on this finding, a better understanding of the bolt force distribution and the unbuttoning phenomenon is needed, as they are key to accurately estimating the bolt group's shear strength. This was achieved by using the finite element (FE) method to prepare the tools needed to identify the failure mode occurring in a bolted connection, and to extract the bolt shear forces in a bolted connection. The behaviour of single-bolted connections subjected to shear loading was first studied using FE models to understand the components of shear resistance. Another goal of this study was to compare multiple extraction methods to obtain the bolt shear force and to determine the most accurate method. It was found that the total force in a bolted connection is being transferred in different mechanisms. These mechanisms included pure shear on the bolt, mechanical interlock between the bolt and plate, and friction between the plates. It was also found that using the contact method provides the most accurate estimate of the bolt shear force for a single-bolted connection. The behaviour of multi-bolted connections subjected to shear loading was also studied to assess how the extraction methods used for single-bolted connections could be applied. In addition, failure indicators to capture net section fracture and bolt shear fracture in FE models of the multi-bolted connections were investigated. It was shown that the equivalent plastic strain (PEEQ) could accurately predict the initial onset of net section fracture. In contrast, comparing the bolt's demand and capacity curve can accurately predict the bolt shear fracture. Moreover, it was shown that extracting the bolt forces from FE models is a complex procedure with various methods available.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Shear flow},\n%keywords = {Failure modes;Fracture;Health hazards;Shear strength;Shear stress;Stress analysis;Stress intensity factors;},\n%note = {Bolt forces;Bolt groups;Bolt shear force;Bolt shears;Bolted connections;Element method;Extraction method;Finite element modelling (FEM);Shear force;Shear loadings;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61531-3_18},\n} \n\n\n
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\n
The CSA S16 and the AISC 360 standards, and various bolt shear studies, are consistent in their assumption that a uniform distribution of applied force exists for short-bolted connections. However, a recent study at McGill University on conventionally constructed braced frames (CCBFs) reported that the shear force was distributed nonuniformly between the bolt group even though the connections were short. Based on this finding, a better understanding of the bolt force distribution and the unbuttoning phenomenon is needed, as they are key to accurately estimating the bolt group's shear strength. This was achieved by using the finite element (FE) method to prepare the tools needed to identify the failure mode occurring in a bolted connection, and to extract the bolt shear forces in a bolted connection. The behaviour of single-bolted connections subjected to shear loading was first studied using FE models to understand the components of shear resistance. Another goal of this study was to compare multiple extraction methods to obtain the bolt shear force and to determine the most accurate method. It was found that the total force in a bolted connection is being transferred in different mechanisms. These mechanisms included pure shear on the bolt, mechanical interlock between the bolt and plate, and friction between the plates. It was also found that using the contact method provides the most accurate estimate of the bolt shear force for a single-bolted connection. The behaviour of multi-bolted connections subjected to shear loading was also studied to assess how the extraction methods used for single-bolted connections could be applied. In addition, failure indicators to capture net section fracture and bolt shear fracture in FE models of the multi-bolted connections were investigated. It was shown that the equivalent plastic strain (PEEQ) could accurately predict the initial onset of net section fracture. In contrast, comparing the bolt's demand and capacity curve can accurately predict the bolt shear fracture. Moreover, it was shown that extracting the bolt forces from FE models is a complex procedure with various methods available.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Lateral Seismic Force Distribution Between Gravity-Force-Resisting Steel Modules and Reinforced Concrete Shear Walls.\n \n \n \n \n\n\n \n Bazarchi, E.; Cyr, A.; Davaran, A.; and Lamarche, C.\n\n\n \n\n\n\n In volume 505 LNCE, pages 313 - 329, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"LateralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20244217189775 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Lateral Seismic Force Distribution Between Gravity-Force-Resisting Steel Modules and Reinforced Concrete Shear Walls},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Bazarchi, Ehsan and Cyr, Alexandre and Davaran, Ali and Lamarche, Charles-Philippe},\nvolume = {505 LNCE},\nyear = {2024},\npages = {313 - 329},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Volumetric modular building structures are becoming increasingly popular due to their significant advantages over traditional on-site construction in terms of speed, quality of workmanship, and environmental impacts. A common type of modular building structure consists of gravity-force-resisting steel modules laterally supported by precast or cast-in-situ reinforced concrete shear walls. This type of modular structural system is common in mid- and high-rise modular buildings. In this system, the shear walls are designed to resist 100% of the lateral loads, followed by designing the gravity-force-resisting modules to stay elastic or have the sufficient nonlinear capacity to support the gravity loads while undergoing earthquake-induced deformations. However, the steel modules inherently exhibit a certain amount of lateral rigidity intended to resist the handling and transportation loads, forming a hybrid system that inevitably attracts a fraction of the total lateral loads. This study examines the effects of three parameters on inter-story shear distribution between gravity-force-resisting modules and the reinforced concrete shear walls: (1) the partial rigidity of intra-module connections, (2) the rotational rigidity of the vertical component of the inter-module connection, and (3) the in-plane stiffness of discrete floor diaphragms. It was found that the proportion of inter-story shear in gravity-force-resisting modules can be minimized by adequately designing the three aforementioned components above.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Shear walls},\n%keywords = {Concrete buildings;Mortar;Partitions (building);Rigid structures;Tall buildings;},\n%note = {Building structure;Gravity force resisting module;Gravity forces;Inter-module;Inter-module connection;Intra-module;Intra-module connection;Modular building structure;Modular buildings;Reinforced concrete shear walls;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61531-3_25},\n} \n\n\n
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\n
Volumetric modular building structures are becoming increasingly popular due to their significant advantages over traditional on-site construction in terms of speed, quality of workmanship, and environmental impacts. A common type of modular building structure consists of gravity-force-resisting steel modules laterally supported by precast or cast-in-situ reinforced concrete shear walls. This type of modular structural system is common in mid- and high-rise modular buildings. In this system, the shear walls are designed to resist 100% of the lateral loads, followed by designing the gravity-force-resisting modules to stay elastic or have the sufficient nonlinear capacity to support the gravity loads while undergoing earthquake-induced deformations. However, the steel modules inherently exhibit a certain amount of lateral rigidity intended to resist the handling and transportation loads, forming a hybrid system that inevitably attracts a fraction of the total lateral loads. This study examines the effects of three parameters on inter-story shear distribution between gravity-force-resisting modules and the reinforced concrete shear walls: (1) the partial rigidity of intra-module connections, (2) the rotational rigidity of the vertical component of the inter-module connection, and (3) the in-plane stiffness of discrete floor diaphragms. It was found that the proportion of inter-story shear in gravity-force-resisting modules can be minimized by adequately designing the three aforementioned components above.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Structural and Environmental Characterization of Modern Concrete Masonry for Climate Change Design Adaptation.\n \n \n \n \n\n\n \n Das, T.; Menun, A. J.; Saad, L.; Sparling, A.; and Malomo, D.\n\n\n \n\n\n\n In volume 507 LNCE, pages 29 - 43, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"StructuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20243917080448 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Structural and Environmental Characterization of Modern Concrete Masonry for Climate Change Design Adaptation},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Das, Tonushri and Menun, Alexander J. and Saad, Lindsay and Sparling, Adrien and Malomo, Daniele},\nvolume = {507 LNCE},\nyear = {2024},\npages = {29 - 43},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">In 2018, the results of a Climate Change Adaptation Standards Inventory Analysis conducted by the Canadian Standards Association (CSA) indicated cavity-wall design as requiring urgent climate change adaptation provisions. Distress in cavity-walls is often attributed to excessive differential movements due to moisture-induced volumetric variations, producing cracks in outer clay brick veneer and compromising durability, which may increase with climate change—test data are, however, still scarce, and only refer to individual blocks/bricks rather than mortared masonry samples. To address these knowledge gaps and devise climate change-adapted design alternatives for cavity-wall structures, a comprehensive research project has recently been launched at McGill University, co-sponsored by Natural Sciences and Engineering Research Council (NSERC), Mitacs, the Canadian Masonry Design Centre (CMDC) and the Canadian Concrete Masonry Producers Association (CCMPA). The latter focuses on the design challenges and structural implications related to the use of wider cavities (to augment thermal insulation) through mechanical and environmental tests, as well as numerical modelling, vital for identifying potential criticalities and opportunities in such new climate-adapted designs. In this paper, we present preliminary results from structural and environmental laboratory characterization studies on modern concrete masonry assemblies, including uniaxial compression tests on masonry units, doublets, triplets and prisms, but also innovative moisture tests specifically conceived to monitor the volumetric variations of both units alone and masonry specimens under controlled temperature and relative humidity, therefore providing a more accurate overview of drying shrinkage. Produced data, combined with those collected in the next research stages through additional tests also on clay brick veneers and building-scale numerical modelling, will enable us to evaluate the combined effects of climate change and multiple design alternatives to meet more stringent sustainability goals, vital for ensuring the durability of the next generation of masonry constructions.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Sustainable development},\n%keywords = {Brick;Brick construction;Compression testing;Concrete blocks;Environmental design;Environmental testing;Thermal insulation;Veneers;Walls (structural partitions);},\n%note = {%moisture;Cavity wall;Clay brick veneer;Climate change adaptation;Concrete masonry;Design adaptations;Design alternatives;Environmental characterization;Structural characterization;Volumetrics;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61539-9_3},\n} \n\n\n
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\n
In 2018, the results of a Climate Change Adaptation Standards Inventory Analysis conducted by the Canadian Standards Association (CSA) indicated cavity-wall design as requiring urgent climate change adaptation provisions. Distress in cavity-walls is often attributed to excessive differential movements due to moisture-induced volumetric variations, producing cracks in outer clay brick veneer and compromising durability, which may increase with climate change—test data are, however, still scarce, and only refer to individual blocks/bricks rather than mortared masonry samples. To address these knowledge gaps and devise climate change-adapted design alternatives for cavity-wall structures, a comprehensive research project has recently been launched at McGill University, co-sponsored by Natural Sciences and Engineering Research Council (NSERC), Mitacs, the Canadian Masonry Design Centre (CMDC) and the Canadian Concrete Masonry Producers Association (CCMPA). The latter focuses on the design challenges and structural implications related to the use of wider cavities (to augment thermal insulation) through mechanical and environmental tests, as well as numerical modelling, vital for identifying potential criticalities and opportunities in such new climate-adapted designs. In this paper, we present preliminary results from structural and environmental laboratory characterization studies on modern concrete masonry assemblies, including uniaxial compression tests on masonry units, doublets, triplets and prisms, but also innovative moisture tests specifically conceived to monitor the volumetric variations of both units alone and masonry specimens under controlled temperature and relative humidity, therefore providing a more accurate overview of drying shrinkage. Produced data, combined with those collected in the next research stages through additional tests also on clay brick veneers and building-scale numerical modelling, will enable us to evaluate the combined effects of climate change and multiple design alternatives to meet more stringent sustainability goals, vital for ensuring the durability of the next generation of masonry constructions.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Geometrical and Material Characterization of Old Industrial Masonry Buildings in Eastern Canada.\n \n \n \n \n\n\n \n Davis, L.; and Malomo, D.\n\n\n \n\n\n\n In volume 507 LNCE, pages 351 - 364, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"GeometricalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20243917080473 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Geometrical and Material Characterization of Old Industrial Masonry Buildings in Eastern Canada},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Davis, Lucy and Malomo, Daniele},\nvolume = {507 LNCE},\nyear = {2024},\npages = {351 - 364},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The benefits of repurposing existing constructions are recognized by provincial legislation for their potential in achieving sustainable development goals. In recent years, adaptive reuse projects in Eastern Canada targeting seismically vulnerable old buildings, especially those once used by local industries and featuring unreinforced masonry members, have significantly increased. When major renovations are planned, however, the objectives set by the National Building Code of Canada require old buildings to achieve the same seismic performance of modern ones. As a result, and because of the lack of ad-hoc guidelines and the limited knowledge of traditional construction methods, local engineers are prompted to design overly invasive retrofits or demolish/reconstruct entire sub-structures. To avoid such unsustainable practices, preserve the integrity of Eastern Canada’s built environment and enable its responsible reuse, this research aims to increase knowledge about the response of old unreinforced brick masonry industrial buildings. These results can aid in the classification of typical old industrial masonry buildings and uncover key structural characteristics and quantify their seismic performance, providing essential yet presently missing data to engineering professionals and researchers involved in seismic upgrading projects. First, archival resources are used to track the evolution of structural systems, architectural features and employed materials at the regional scale, enabling us to identify representative building assets at the municipal level. Targeted onsite surveys are thus conducted to evaluate structural conditions and material properties, as well as to create high-fidelity digital geometries, through visual assessment, non-destructive testing and 3D laser scanning. Informed seismic analyses can then performed via numerical modelling, providing insights on recurrent failure mechanisms, displacement and base shear capacities. In this paper, the proposed holistic methodology is applied to two case study buildings located in Montréal and preliminary results are presented. The results presented herein will allow for identification of more sustainable, less invasive but equally performing seismic retrofit measures, tailored to the unique characteristics of the local old industrial masonry structures.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Office buildings},\n%keywords = {Brick buildings;Brick construction;Mortar;Partitions (building);Retaining walls;Retrofitting;Seismic design;Seismic response;},\n%note = {Eastern Canada;Industrial buildings;Masonry building;Materials characterization;Non destructive testing;Old buildings;Repurposing;Seismic assessment;Seismic Performance;Unreinforced masonries (URMs);},\nURL = {http://dx.doi.org/10.1007/978-3-031-61539-9_28},\n} \n\n\n
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\n
The benefits of repurposing existing constructions are recognized by provincial legislation for their potential in achieving sustainable development goals. In recent years, adaptive reuse projects in Eastern Canada targeting seismically vulnerable old buildings, especially those once used by local industries and featuring unreinforced masonry members, have significantly increased. When major renovations are planned, however, the objectives set by the National Building Code of Canada require old buildings to achieve the same seismic performance of modern ones. As a result, and because of the lack of ad-hoc guidelines and the limited knowledge of traditional construction methods, local engineers are prompted to design overly invasive retrofits or demolish/reconstruct entire sub-structures. To avoid such unsustainable practices, preserve the integrity of Eastern Canada’s built environment and enable its responsible reuse, this research aims to increase knowledge about the response of old unreinforced brick masonry industrial buildings. These results can aid in the classification of typical old industrial masonry buildings and uncover key structural characteristics and quantify their seismic performance, providing essential yet presently missing data to engineering professionals and researchers involved in seismic upgrading projects. First, archival resources are used to track the evolution of structural systems, architectural features and employed materials at the regional scale, enabling us to identify representative building assets at the municipal level. Targeted onsite surveys are thus conducted to evaluate structural conditions and material properties, as well as to create high-fidelity digital geometries, through visual assessment, non-destructive testing and 3D laser scanning. Informed seismic analyses can then performed via numerical modelling, providing insights on recurrent failure mechanisms, displacement and base shear capacities. In this paper, the proposed holistic methodology is applied to two case study buildings located in Montréal and preliminary results are presented. The results presented herein will allow for identification of more sustainable, less invasive but equally performing seismic retrofit measures, tailored to the unique characteristics of the local old industrial masonry structures.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Bond‒Slip Behavior and Pullout Capacity of Bundled Ribbed GFRP Rebars in Concrete.\n \n \n \n \n\n\n \n Habibi, O.; Shabani, H.; Asadian, A.; and Galal, K.\n\n\n \n\n\n\n In volume 507 LNCE, pages 175 - 184, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"Bond‒SlipPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20243917080460 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Bond‒Slip Behavior and Pullout Capacity of Bundled Ribbed GFRP Rebars in Concrete},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Habibi, Omid and Shabani, Hamed and Asadian, Alireza and Galal, Khaled},\nvolume = {507 LNCE},\nyear = {2024},\npages = {175 - 184},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The use of a large number of reinforcing bars in one layer in reinforced concrete (RC) flexural elements can create difficulties for concrete consolidation on-site. Using larger bar sizes instead of smaller bars to provide the same reinforcement ratio is not always a practical solution because of their supply shortage and their lower perimeter, which increases their development and splice lengths. Placing the same reinforcement in multiple layers will reduce the capacity of the RC section in serviceability and ultimate limit states and can add complexity to the bar placement on-site. In such situations, bundling the rebar can be a practical solution. Glass fiber reinforced polymer (GFRP) rebars are used in applications where corrosion of steel rebars in RC structures is of concern. Most of the research on bundled reinforcing bars was conducted on steel rebars. However, there is a lack of knowledge about the bond behavior and anchorage capacity of bundled GFRP bars. This research aims to investigate the effect of bundling on the pullout capacity, bond–slip behavior, and bond strength of ribbed GFRP rebars in concrete. To achieve the objectives of this research, 12 pullout specimens, including 6 individual and 6 bundled GFRP rebars, were cast and tested. The specimens were cast in dimensions of 200 × 200 × 200 and 300 × 300 × 300 mm. Ribbed GFRP rebar of 16 mm (No. 5) and 25.4 mm (No. 8) diameters and 9.5 mm (No. 3) and 12.7 mm (No. 4) diameters were used for individual bar and three-bar bundle specimens, respectively. During the test, the load and slip of the rebar were measured and recorded. The experimental results were analyzed, compared, and discussed in terms of the pullout strength, bond–slip behavior, and failure mode. Based on the experimental results, all the specimens experienced brittle concrete splitting failure. Similar to bundled steel reinforcing bars, the experimental results showed that the equivalent sectional area method provides close predictions for the pullout capacity of bundled ribbed GFRP bars when compared to corresponding individual bars. The bond strength of the bars and concrete increased noticeably as the dimensions of the specimens increased.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Steel corrosion},\n%keywords = {Aluminum beams and girders;Anchorages (concrete construction);Bond strength (materials);Composite beams and girders;Concrete placing;Cracks;Elastomers;Fiber reinforced concrete;Fracture mechanics;Glass fiber reinforced plastics;Glass fibers;High modulus textile fibers;Rebar;Shotcreting;Slip forming;},\n%note = {Bond slips;Bond strength;Bundled bar;Equivalent sectional area;Glassfiber reinforced polymers (GFRP);Polymer rebars;Pullout;Ribbed glass fiber reinforced polymer rebar;Sectional areas;Slip behavior;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61539-9_15},\n} \n\n\n
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The use of a large number of reinforcing bars in one layer in reinforced concrete (RC) flexural elements can create difficulties for concrete consolidation on-site. Using larger bar sizes instead of smaller bars to provide the same reinforcement ratio is not always a practical solution because of their supply shortage and their lower perimeter, which increases their development and splice lengths. Placing the same reinforcement in multiple layers will reduce the capacity of the RC section in serviceability and ultimate limit states and can add complexity to the bar placement on-site. In such situations, bundling the rebar can be a practical solution. Glass fiber reinforced polymer (GFRP) rebars are used in applications where corrosion of steel rebars in RC structures is of concern. Most of the research on bundled reinforcing bars was conducted on steel rebars. However, there is a lack of knowledge about the bond behavior and anchorage capacity of bundled GFRP bars. This research aims to investigate the effect of bundling on the pullout capacity, bond–slip behavior, and bond strength of ribbed GFRP rebars in concrete. To achieve the objectives of this research, 12 pullout specimens, including 6 individual and 6 bundled GFRP rebars, were cast and tested. The specimens were cast in dimensions of 200 × 200 × 200 and 300 × 300 × 300 mm. Ribbed GFRP rebar of 16 mm (No. 5) and 25.4 mm (No. 8) diameters and 9.5 mm (No. 3) and 12.7 mm (No. 4) diameters were used for individual bar and three-bar bundle specimens, respectively. During the test, the load and slip of the rebar were measured and recorded. The experimental results were analyzed, compared, and discussed in terms of the pullout strength, bond–slip behavior, and failure mode. Based on the experimental results, all the specimens experienced brittle concrete splitting failure. Similar to bundled steel reinforcing bars, the experimental results showed that the equivalent sectional area method provides close predictions for the pullout capacity of bundled ribbed GFRP bars when compared to corresponding individual bars. The bond strength of the bars and concrete increased noticeably as the dimensions of the specimens increased.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Flexural and Serviceability Behavior of Steel, GFRP, and Steel-GFRP Hybrid Reinforced Beams.\n \n \n \n \n\n\n \n Ibrahim, M.; Asadian, A.; and Galal, K.\n\n\n \n\n\n\n In volume 505 LNCE, pages 239 - 248, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"FlexuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20244217189769 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Flexural and Serviceability Behavior of Steel, GFRP, and Steel-GFRP Hybrid Reinforced Beams},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Ibrahim, Mostafa and Asadian, Alireza and Galal, Khaled},\nvolume = {505 LNCE},\nyear = {2024},\npages = {239 - 248},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Concrete beams reinforced with a combination of steel rebars and glass fiber-reinforced polymer (GFRP) rebars can offer enhanced ductility, serviceability, and durability compared to those reinforced with the same total number of steel or GFRP rebars. This paper presents the flexural and serviceability behavior of steel-GFRP hybrid reinforced concrete (RC) beams. A total of four reinforced concrete beams, including two control beams, one reinforced with steel rebars and one with GFRP bars, and two steel-GFRP hybrid beams were tested under a four-point bending setup. All the beams were reinforced with four 20 mm (No. 6) rebars placed in one layer. The ratio of GFRP to steel reinforcement was the main parameter investigated. The experimental results of the beams were analyzed and compared in terms of flexural capacity, yielding load, and deflection. Based on the experimental results, steel-GFRP hybrid RC beams exhibited a higher ultimate strength than the steel RC beam but a lower ultimate strength than the GFRP RC beam. Moreover, the deflection at the same load level increased by increasing the GFRP to steel reinforcement ratio in the cross section. In addition, the results showed that the GFRP to steel reinforcement ratio significantly affects the flexural behavior of hybrid RC beams. Finally, the moment capacity of the beams was calculated using the fundamentals of section analysis, which showed very good agreement with the experimental results.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Concrete beams and girders},\n%keywords = {Deflection (structures);Elastomers;Fiber reinforced concrete;Glass fiber reinforced plastics;Glass fibers;High modulus textile fibers;Rebar;Steel beams and girders;},\n%note = {Deflection;Glass-fiber reinforced polymer bars;Glassfiber reinforced polymers (GFRP);Polymer hybrid;Polymer rebars;Reinforced concrete beams;Serviceability;Steel rebars;Steel reinforcements;Steel-glass fiber-reinforced polymer hybrid reinforced concrete beam;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61531-3_19},\n} \n\n\n
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\n
Concrete beams reinforced with a combination of steel rebars and glass fiber-reinforced polymer (GFRP) rebars can offer enhanced ductility, serviceability, and durability compared to those reinforced with the same total number of steel or GFRP rebars. This paper presents the flexural and serviceability behavior of steel-GFRP hybrid reinforced concrete (RC) beams. A total of four reinforced concrete beams, including two control beams, one reinforced with steel rebars and one with GFRP bars, and two steel-GFRP hybrid beams were tested under a four-point bending setup. All the beams were reinforced with four 20 mm (No. 6) rebars placed in one layer. The ratio of GFRP to steel reinforcement was the main parameter investigated. The experimental results of the beams were analyzed and compared in terms of flexural capacity, yielding load, and deflection. Based on the experimental results, steel-GFRP hybrid RC beams exhibited a higher ultimate strength than the steel RC beam but a lower ultimate strength than the GFRP RC beam. Moreover, the deflection at the same load level increased by increasing the GFRP to steel reinforcement ratio in the cross section. In addition, the results showed that the GFRP to steel reinforcement ratio significantly affects the flexural behavior of hybrid RC beams. Finally, the moment capacity of the beams was calculated using the fundamentals of section analysis, which showed very good agreement with the experimental results.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Compressive Strength of Rocking Steel Bridge Pier upon Rocking.\n \n \n \n \n\n\n \n Islam, K.; Tremblay, R.; and Alam, M. S.\n\n\n \n\n\n\n In volume 507 LNCE, pages 129 - 142, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"CompressivePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917080456 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Compressive Strength of Rocking Steel Bridge Pier upon Rocking},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Islam, Kamrul and Tremblay, Robert and Alam, M. Shahria},\nvolume = {507 LNCE},\nyear = {2024},\npages = {129 - 142},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Controlled-rocking piers have gained popularity over the last few decades to achieve enhanced seismic performance for bridge structures. Past research on this system has focused on concrete rocking bridge piers. Recently, rocking bridge piers made from tubular steel sections have been proposed as a possible cost-effective alternative to concrete piers. A steel rocking bridge pier comprises a circular steel tube with welded circular plates at the top and bottom ends, post-tensioned tendons, and energy dissipaters at the rocking interface(s). During a seismic event, lateral displacement of the bridge superstructure is accommodated by means of gap opening and closing at the rocking interfaces located at the top and bottom ends of the columns. Upon column rocking, the gravity load is no longer evenly distributed over the column cross-section, which induces stress concentration and flexural demand on the column that can detrimentally affect its compressive resistance. This article presents a numerical investigation using three-dimensional continuum finite element analysis that was performed to evaluate the effect of column rocking on the compressive resistance of tubular steel bridge piers. The influence of key parameters is examined, including the column diameter-to-thickness ratio, the thickness and overhang dimension of the end plates, the axial load ratio, and the tilt angle of the column. For the range of values considered for those parameters, the study shows that the loss in compressive resistance compared to a vertical column can vary from 13 to 58%, and the most influential parameter is the column diameter-to-thickness ratio.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Bridge piers},\n%keywords = {Bridge decks;Buckling;Columns (structural);Compressive strength;Concrete bridges;Pressure vessels;Steel bridges;Stress concentration;Tubular steel structures;},\n%note = {Bottom ends;Bridge structures;Compressive resistance;Diameter-to-thickness ratios;Finite element analyse;Rocking bridge pier;Seismic Performance;Steel bridge piers;Steel sections;Tubular steels;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61539-9_11},\n} \n\n\n
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Controlled-rocking piers have gained popularity over the last few decades to achieve enhanced seismic performance for bridge structures. Past research on this system has focused on concrete rocking bridge piers. Recently, rocking bridge piers made from tubular steel sections have been proposed as a possible cost-effective alternative to concrete piers. A steel rocking bridge pier comprises a circular steel tube with welded circular plates at the top and bottom ends, post-tensioned tendons, and energy dissipaters at the rocking interface(s). During a seismic event, lateral displacement of the bridge superstructure is accommodated by means of gap opening and closing at the rocking interfaces located at the top and bottom ends of the columns. Upon column rocking, the gravity load is no longer evenly distributed over the column cross-section, which induces stress concentration and flexural demand on the column that can detrimentally affect its compressive resistance. This article presents a numerical investigation using three-dimensional continuum finite element analysis that was performed to evaluate the effect of column rocking on the compressive resistance of tubular steel bridge piers. The influence of key parameters is examined, including the column diameter-to-thickness ratio, the thickness and overhang dimension of the end plates, the axial load ratio, and the tilt angle of the column. For the range of values considered for those parameters, the study shows that the loss in compressive resistance compared to a vertical column can vary from 13 to 58%, and the most influential parameter is the column diameter-to-thickness ratio.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Seismic Performance Assessment of Reinforced Masonry Core Walls with Boundary Elements.\n \n \n \n \n\n\n \n Mahrous, A.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n In volume 505 LNCE, pages 411 - 426, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20244217189782 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Performance Assessment of Reinforced Masonry Core Walls with Boundary Elements},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Mahrous, Amgad and AbdelRahman, Belal and Galal, Khaled},\nvolume = {505 LNCE},\nyear = {2024},\npages = {411 - 426},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Many experimental and numerical studies have investigated the improvement in the seismic performance of reinforced masonry (RM) shear walls as a result of adding confined end zones (i.e., boundary elements) to rectangular shear walls. Moreover, the Canadian masonry design standard (CSA S304-14) introduced a ductile shear wall system and special seismic design provisions for masonry boundary elements. Furthermore, the National Building Code of Canada (NBCC, in National building code of Canada, National research council of Canada. NBCC, Ottawa [1]) permits the use of ductile shear walls as a seismic force-resisting system (SFRS) with height limits of up to 60 and 40 m for moderate and high seismic regions, respectively. Therefore, as a continuous improvement in the seismic design of RM structures, this study assesses the seismic performance of reinforced masonry core walls built up of RM shear walls with boundary elements to act as the main SFRS in typical RM buildings. The applied element method (AEM) implemented in the extreme loading for structures (ELS) software was utilized to simulate the seismic behavior of RM shear walls having different cross-sectional configurations and design parameters. Moreover, to evaluate the seismic performance of reinforced masonry core walls with boundary elements (RMCW+BEs). The results showed that RMCW+BEs can be used as an SFRS in RM structures and can be adopted in the next generation of North American masonry standards. Moreover, this study highlights the importance of implementing a shear amplification factor to account for the higher mode effects in multi-story RM buildings.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Shear walls},\n%keywords = {Masonry materials;Nonlinear analysis;Seismic design;Seismic response;Structural dynamics;},\n%note = {Applied element method;Boundary elements;Core wall;Element method;Higher mode;Masonry shear walls;Reinforced masonry;Reinforced masonry shear wall;Seismic forces;Seismic Performance;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61531-3_32},\n} \n\n\n
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Many experimental and numerical studies have investigated the improvement in the seismic performance of reinforced masonry (RM) shear walls as a result of adding confined end zones (i.e., boundary elements) to rectangular shear walls. Moreover, the Canadian masonry design standard (CSA S304-14) introduced a ductile shear wall system and special seismic design provisions for masonry boundary elements. Furthermore, the National Building Code of Canada (NBCC, in National building code of Canada, National research council of Canada. NBCC, Ottawa [1]) permits the use of ductile shear walls as a seismic force-resisting system (SFRS) with height limits of up to 60 and 40 m for moderate and high seismic regions, respectively. Therefore, as a continuous improvement in the seismic design of RM structures, this study assesses the seismic performance of reinforced masonry core walls built up of RM shear walls with boundary elements to act as the main SFRS in typical RM buildings. The applied element method (AEM) implemented in the extreme loading for structures (ELS) software was utilized to simulate the seismic behavior of RM shear walls having different cross-sectional configurations and design parameters. Moreover, to evaluate the seismic performance of reinforced masonry core walls with boundary elements (RMCW+BEs). The results showed that RMCW+BEs can be used as an SFRS in RM structures and can be adopted in the next generation of North American masonry standards. Moreover, this study highlights the importance of implementing a shear amplification factor to account for the higher mode effects in multi-story RM buildings.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Flexural Performance of Cross-Laminated Timber Panels Using Evolutionary Artificial Neural Networks.\n \n \n \n \n\n\n \n Malekabadi, R. A.; Nikoo, M.; Hafeez, G.; and Bagchi, A.\n\n\n \n\n\n\n In volume 505 LNCE, pages 331 - 342, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"FlexuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20244217189776 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Flexural Performance of Cross-Laminated Timber Panels Using Evolutionary Artificial Neural Networks},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Malekabadi, Reza Abbasi and Nikoo, Mehdi and Hafeez, Ghazanfarah and Bagchi, Ashutosh},\nvolume = {505 LNCE},\nyear = {2024},\npages = {331 - 342},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Cross-laminated timber (CLT) is a panelized engineering wood product known for its strong and lightweight properties. Construction with CLT panels has been a growing trend to meet the low-carbon building alternatives. This study generates a reliable artificial neural networks (ANNs)-based model for estimating the flexural performance of CLT panels. Genetic algorithm (GA) with multilayer perceptron (MLP) was implemented on a dataset of CLT panels considering width, span length, thickness, bending, and shearing strength variables as input parameters to determine the flexural strength of the panels. 70% of the data were used for training and 30% for testing phases. The accuracy of GA-based MLP model was evaluated by comparing the results with multiple linear regression (MLR) and a variety of feed-forward (FF) models. The results revealed that the GA-optimized MLP model could estimate the flexural strength of CLT panels with the highest accuracy.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Timber},\n%keywords = {Bending strength;Laminating;Multilayer neural networks;Multiple linear regression;Wood products;},\n%note = {Cross laminated;Cross-laminated timber;Evolutionary artificial neural networks;Flexural performance;Laminated timber;Maximum moments;Multilayers perceptrons;Neural-networks;Panel;Property;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61531-3_26},\n} \n\n\n
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Cross-laminated timber (CLT) is a panelized engineering wood product known for its strong and lightweight properties. Construction with CLT panels has been a growing trend to meet the low-carbon building alternatives. This study generates a reliable artificial neural networks (ANNs)-based model for estimating the flexural performance of CLT panels. Genetic algorithm (GA) with multilayer perceptron (MLP) was implemented on a dataset of CLT panels considering width, span length, thickness, bending, and shearing strength variables as input parameters to determine the flexural strength of the panels. 70% of the data were used for training and 30% for testing phases. The accuracy of GA-based MLP model was evaluated by comparing the results with multiple linear regression (MLR) and a variety of feed-forward (FF) models. The results revealed that the GA-optimized MLP model could estimate the flexural strength of CLT panels with the highest accuracy.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Limit State and Discontinuum-Based Structural Analyses of the Pakenham Bridge (Ontario, Canada).\n \n \n \n \n\n\n \n Miller, R.; Roy, M.; Vickers, S.; Davis, L.; Malomo, D.; and Pulatsu, B.\n\n\n \n\n\n\n In volume 507 LNCE, pages 103 - 115, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"LimitPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917080454 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Limit State and Discontinuum-Based Structural Analyses of the Pakenham Bridge (Ontario, Canada)},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Miller, Rowan and Roy, Milan and Vickers, Stephen and Davis, Lucy and Malomo, Daniele and Pulatsu, Bora},\nvolume = {507 LNCE},\nyear = {2024},\npages = {103 - 115},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Stone and brickwork masonry arch bridges constitute historic landmarks and are an integral part of the road and railway transportation systems in Canada. However, the accurate prediction of their structural behavior and load-carrying capacity is a challenging task, given the complexity of the material behavior, geometrical features, and the soil-structure interaction phenomenon taking place between the masonry and soil backfill. Typically, continuum-based approaches (e.g., standard finite element analysis) may fail to simulate the influence of the morphological features of masonry systems and the discontinuous nature of the material. This research aims to provide an in-depth understanding about the computational modeling of masonry arch bridges by adopting more suitable structural analysis approaches, namely, limit state and mixed discrete-continuum analyses. The latter enables a detailed representation of the structural components in a masonry arch bridge, including soil backfill, arch barrel, and spandrel walls, in a 3D setting based on the discrete element method (DEM). In contrast, limit state analysis adopts rigid blocks with active/passive soil pressure applied on the extrados of the arch barrels. Both numerical modeling techniques are adopted to simulate one of Canada’s oldest multi-span stone masonry arch bridges, the Pakenham Bridge (Lanark County, ON, Canada). In the mixed discrete-continuum approach, a progressive procedure is followed where the level of complexity in the computational model is gradually enhanced. First, the arch skeleton is analyzed, and then the effect of soil backfill is captured by adding a continuous medium within the framework of the DEM. Finally, the spandrels walls are included to examine their out-of-plane deformation under the serviceability and ultimate state conditions. The results indicate the differences between 2 and 3D analyses and highlight the influence of soil backfill on the load-carrying capacity of arch bridges. Furthermore, important inferences are made regarding the modeling techniques and the macro behavior of the analyzed multi-span stone masonry arch bridge.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Arch bridges},\n%keywords = {Arches;Bridge approaches;Convergence of numerical methods;Masonry bridges;Railroad transportation;Retaining walls;Soil structure interactions;},\n%note = {Computational modelling;Discrete elements method;Limit state;Limit state analysis;Limit state analyze;Load carrying;Masonry arch bridges;Mixed discrete-continuum approach;Soil backfill;Soil-structure interaction;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61539-9_9},\n} \n\n\n
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Stone and brickwork masonry arch bridges constitute historic landmarks and are an integral part of the road and railway transportation systems in Canada. However, the accurate prediction of their structural behavior and load-carrying capacity is a challenging task, given the complexity of the material behavior, geometrical features, and the soil-structure interaction phenomenon taking place between the masonry and soil backfill. Typically, continuum-based approaches (e.g., standard finite element analysis) may fail to simulate the influence of the morphological features of masonry systems and the discontinuous nature of the material. This research aims to provide an in-depth understanding about the computational modeling of masonry arch bridges by adopting more suitable structural analysis approaches, namely, limit state and mixed discrete-continuum analyses. The latter enables a detailed representation of the structural components in a masonry arch bridge, including soil backfill, arch barrel, and spandrel walls, in a 3D setting based on the discrete element method (DEM). In contrast, limit state analysis adopts rigid blocks with active/passive soil pressure applied on the extrados of the arch barrels. Both numerical modeling techniques are adopted to simulate one of Canada’s oldest multi-span stone masonry arch bridges, the Pakenham Bridge (Lanark County, ON, Canada). In the mixed discrete-continuum approach, a progressive procedure is followed where the level of complexity in the computational model is gradually enhanced. First, the arch skeleton is analyzed, and then the effect of soil backfill is captured by adding a continuous medium within the framework of the DEM. Finally, the spandrels walls are included to examine their out-of-plane deformation under the serviceability and ultimate state conditions. The results indicate the differences between 2 and 3D analyses and highlight the influence of soil backfill on the load-carrying capacity of arch bridges. Furthermore, important inferences are made regarding the modeling techniques and the macro behavior of the analyzed multi-span stone masonry arch bridge.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Assessment of Earthquake-Induced Losses of Existing Reinforced Concrete Buildings for Different Seismic Design Code Levels.\n \n \n \n \n\n\n \n Montazeri, M.; and Abo El Ezz, A.\n\n\n \n\n\n\n In volume 505 LNCE, pages 1 - 13, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"AssessmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20244217189751 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment of Earthquake-Induced Losses of Existing Reinforced Concrete Buildings for Different Seismic Design Code Levels},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Montazeri, Maryam and Abo El Ezz, Ahmad},\nvolume = {505 LNCE},\nyear = {2024},\npages = {1 - 13},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Past major earthquake events worldwide have shown significant economic and social losses to impacted communities. The assessment of potential losses is essential for the preparation of mitigation plans and emergency response measures toward improved seismic resiliency. Recent research has focused on the aspect of loss of functionality of buildings as a significant measure of seismic resilience. Several approaches are available for loss estimations including empirical and analytical methods with varying degrees of complexity. For the assessment of a large portfolio of buildings, there is a need for simplified and rapid tools that can be applied with reduced computational time. This paper presents a methodology for the assessment of expected earthquake-induced losses including direct economic losses and the loss of functionality of existing high-rise reinforced concrete shear wall buildings in Eastern Canada. The methodology consists of hazard analysis using response spectra compatible with the National Building Code of Canada hazard values, structural analysis using an iterative capacity spectrum method, damage analysis based on drift and acceleration fragility functions for structural and non-structural components, and loss analysis based on the correlation between predicted damage states and repair costs as well as the probability of loss of functionality. A comparison between expected losses for different seismic design levels according to the year of construction is presented and discussed.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Shear walls},\n%keywords = {Concrete buildings;Earthquake effects;Emergency services;Induced Seismicity;Risk assessment;Seismic design;Structural analysis;Tall buildings;},\n%note = {Capacity spectrum method;Earthquake events;Economic loss;Existing reinforced concrete;Functional loss;Induced loss;Potential loss;Reinforced concrete buildings;Risk evaluation;Seismic design code;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61531-3_1},\n} \n\n\n
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Past major earthquake events worldwide have shown significant economic and social losses to impacted communities. The assessment of potential losses is essential for the preparation of mitigation plans and emergency response measures toward improved seismic resiliency. Recent research has focused on the aspect of loss of functionality of buildings as a significant measure of seismic resilience. Several approaches are available for loss estimations including empirical and analytical methods with varying degrees of complexity. For the assessment of a large portfolio of buildings, there is a need for simplified and rapid tools that can be applied with reduced computational time. This paper presents a methodology for the assessment of expected earthquake-induced losses including direct economic losses and the loss of functionality of existing high-rise reinforced concrete shear wall buildings in Eastern Canada. The methodology consists of hazard analysis using response spectra compatible with the National Building Code of Canada hazard values, structural analysis using an iterative capacity spectrum method, damage analysis based on drift and acceleration fragility functions for structural and non-structural components, and loss analysis based on the correlation between predicted damage states and repair costs as well as the probability of loss of functionality. A comparison between expected losses for different seismic design levels according to the year of construction is presented and discussed.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Low-Cyclic Tension–Tension Fatigue Behaviour of GFRP Reinforcing Bars.\n \n \n \n \n\n\n \n Nagy, I. E.; Asadian, A.; and Galal, K.\n\n\n \n\n\n\n In volume 507 LNCE, pages 199 - 208, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"Low-CyclicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917080462 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Low-Cyclic Tension–Tension Fatigue Behaviour of GFRP Reinforcing Bars},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Nagy, Islam Elsayed and Asadian, Alireza and Galal, Khaled},\nvolume = {507 LNCE},\nyear = {2024},\npages = {199 - 208},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Glass fibre-reinforced polymer (GFRP) bars are used as internal reinforcement in several structural applications, while research is currently developing in this field. Although the use of GFRP rebars in bridge applications is increasing, more experimental data needs to be collected on the behaviour of GFRP bars under fatigue loading. This paper presents and discusses the results of 9 ribbed GFRP bars tested under low-cyclic tension–tension fatigue under different stress levels. A detailed comparison is made between the available experimental fatigue data tested under high frequencies and low-cyclic fatigue tested in this study. The main advantages and disadvantages of this type of test are discussed.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Glass fiber reinforced plastics},\n%keywords = {Fatigue testing;Glass fibers;},\n%note = {Cyclic tension;Glass-fiber reinforced polymer bars;Glassfiber reinforced polymers (GFRP);Low cyclic fatigue;Polymer rebars;Reinforcing bar;Ribbed glass fiber-reinforced polymer bar;Structural applications;Tension-tension fatigue behavior;Tension–tension fatigue;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61539-9_17},\n} \n\n\n
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Glass fibre-reinforced polymer (GFRP) bars are used as internal reinforcement in several structural applications, while research is currently developing in this field. Although the use of GFRP rebars in bridge applications is increasing, more experimental data needs to be collected on the behaviour of GFRP bars under fatigue loading. This paper presents and discusses the results of 9 ribbed GFRP bars tested under low-cyclic tension–tension fatigue under different stress levels. A detailed comparison is made between the available experimental fatigue data tested under high frequencies and low-cyclic fatigue tested in this study. The main advantages and disadvantages of this type of test are discussed.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Examining Equitable, Inclusive, and Accessible Teaching and Learning Strategies for Deaf and Hard of Hearing Students in Canadian Civil Engineering Core Courses.\n \n \n \n \n\n\n \n Prado, P.; and Malomo, D.\n\n\n \n\n\n\n In volume 495 LNCE, pages 295 - 304, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"ExaminingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20244217206280 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Examining Equitable, Inclusive, and Accessible Teaching and Learning Strategies for Deaf and Hard of Hearing Students in Canadian Civil Engineering Core Courses},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Prado, Paola and Malomo, Daniele},\nvolume = {495 LNCE},\nyear = {2024},\npages = {295 - 304},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Engineering core courses are, in nature, heavily concept-based applied science subjects commonly taught through laboratory, examination, and group work components. This type of coursework is specially challenging in the context of Deaf and Hard of Hearing (DHH) students when not combined with appropriate accommodations. Standard accommodation practices offered by Canadian universities, such as %note-taking, real-time captioning, American Sign Language (ASL) interpreters, and transcription, are generally targeted at students and do not involve instructors, which can be a key factor in improving inclusive learning in these capacities. The development of holistic teaching and learning strategies combined with current existing accommodations can further the representation and success of DHH students enrolled in engineering programs. The purpose of this paper is to evaluate existing strategies employed in aiding the learning process of DHH students in engineering undergraduate core courses. This is done as an attempt to find a holistic approach that can optimize the said students’ learning experiences, and bridging the existing research gap in the field. This article consists of a critical review of literature available on teaching and learning strategies for DHH students enrolled in undergraduate engineering core courses. The problem is analyzed through technology, pedagogy, and cognition-directed lenses. To create truly equitable environments for DHH students in engineering undergraduate programs, instructors may adapt their courses using pedagogical and technological strategies that consider these students’ cognitive particularities. Of the reviewed available literature, suggested strategies would include incorporating experiential learning, adjunct questions, and screencasts. It is important to %note, however, that the lack of representation of the DHH demographic in engineering programs is reflected in the lack of research conducted with respect to DHH education within an engineering context.<br/></div> © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.},\nkey = {Students},\n%keywords = {Audition;Curricula;Engineering education;Program interpreters;Teaching;},\n%note = {Applied science;Concept-based;Core course;Engineering program;Engineering undergraduates;Hard of hearing student;Hard of hearings;Teaching and learning;Teaching and learning strategy;Undergraduate Courses;},\nURL = {http://dx.doi.org/10.1007/978-3-031-60415-7_22},\n} \n\n\n
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Engineering core courses are, in nature, heavily concept-based applied science subjects commonly taught through laboratory, examination, and group work components. This type of coursework is specially challenging in the context of Deaf and Hard of Hearing (DHH) students when not combined with appropriate accommodations. Standard accommodation practices offered by Canadian universities, such as %note-taking, real-time captioning, American Sign Language (ASL) interpreters, and transcription, are generally targeted at students and do not involve instructors, which can be a key factor in improving inclusive learning in these capacities. The development of holistic teaching and learning strategies combined with current existing accommodations can further the representation and success of DHH students enrolled in engineering programs. The purpose of this paper is to evaluate existing strategies employed in aiding the learning process of DHH students in engineering undergraduate core courses. This is done as an attempt to find a holistic approach that can optimize the said students’ learning experiences, and bridging the existing research gap in the field. This article consists of a critical review of literature available on teaching and learning strategies for DHH students enrolled in undergraduate engineering core courses. The problem is analyzed through technology, pedagogy, and cognition-directed lenses. To create truly equitable environments for DHH students in engineering undergraduate programs, instructors may adapt their courses using pedagogical and technological strategies that consider these students’ cognitive particularities. Of the reviewed available literature, suggested strategies would include incorporating experiential learning, adjunct questions, and screencasts. It is important to %note, however, that the lack of representation of the DHH demographic in engineering programs is reflected in the lack of research conducted with respect to DHH education within an engineering context.
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.\n
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\n \n\n \n \n \n \n \n \n Flexural Behavior of Concrete Beams Reinforced with Low- or High-Ductility Geogrid.\n \n \n \n \n\n\n \n Shokr, M.; Meguid, M.; Bhat, S.; and Malomo, D.\n\n\n \n\n\n\n In volume 507 LNCE, pages 83 - 92, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"FlexuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917080452 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Flexural Behavior of Concrete Beams Reinforced with Low- or High-Ductility Geogrid},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Shokr, M.A. and Meguid, M. and Bhat, S. and Malomo, D.},\nvolume = {507 LNCE},\nyear = {2024},\npages = {83 - 92},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The deterioration of non-structural concrete elements in harsh environments is a major issue for Canada’s cold regions. With conventional steel reinforcements being prone to corrosion and due to climate change-induced projected alteration in temperature, precipitation, and freeze–thaw patterns, the use of more durable reinforcing materials to avoid premature cracking in non-structural concrete components is desirable. In this paper, we investigate through mechanical testing the potential advantages of utilizing either low-ductility fiberglass grids with stiff polymeric coating or high-ductility polymeric geogrid as reinforcing layers to reduce crack opening and increase the flexural performance of plain concrete beams. A total of nine concrete beams with dimensions of 550 × 150 × 150 mm were thus prepared and tested under four-point bending, and their flexural behaviour was monitored in terms of load–deflection relationship, energy absorption capacity, and failure modes. Test results indicate that the use of stiff polymer-coated fiberglass reinforcement can significantly improve the flexural capacity of plain concrete compared to their polymeric counterparts. Similarly, it was observed that fiberglass-reinforcing solutions also provided superior resistance to cracking and post-cracking in comparison with control (plain) beams.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Concrete beams and girders},\n%keywords = {Atmospheric corrosion;Bending moments;Compressive strength;Elastomers;Glass fibers;Silicones;},\n%note = {Cold regions;Concrete beam;Concrete elements;Conventional steel;Flexural behavior;Geogrids;Harsh environment;Low-ductility fiberglass grid;Non-structural concretes;Plain concrete;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61539-9_7},\n} \n\n\n
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The deterioration of non-structural concrete elements in harsh environments is a major issue for Canada’s cold regions. With conventional steel reinforcements being prone to corrosion and due to climate change-induced projected alteration in temperature, precipitation, and freeze–thaw patterns, the use of more durable reinforcing materials to avoid premature cracking in non-structural concrete components is desirable. In this paper, we investigate through mechanical testing the potential advantages of utilizing either low-ductility fiberglass grids with stiff polymeric coating or high-ductility polymeric geogrid as reinforcing layers to reduce crack opening and increase the flexural performance of plain concrete beams. A total of nine concrete beams with dimensions of 550 × 150 × 150 mm were thus prepared and tested under four-point bending, and their flexural behaviour was monitored in terms of load–deflection relationship, energy absorption capacity, and failure modes. Test results indicate that the use of stiff polymer-coated fiberglass reinforcement can significantly improve the flexural capacity of plain concrete compared to their polymeric counterparts. Similarly, it was observed that fiberglass-reinforcing solutions also provided superior resistance to cracking and post-cracking in comparison with control (plain) beams.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Seismic Response Analysis of Highway Bridge with Pier Wall.\n \n \n \n \n\n\n \n Song, S.; and Xie, Y.\n\n\n \n\n\n\n In volume 505 LNCE, pages 273 - 285, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20244217189772 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Response Analysis of Highway Bridge with Pier Wall},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Song, Sirui and Xie, Yazhou},\nvolume = {505 LNCE},\nyear = {2024},\npages = {273 - 285},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Wall-pier highway bridge is one major bridge type in seismic zones around the globe. Unlike well-designed bridge columns dominated by seismic flexural damage, pier walls in a bridge system exhibit unsymmetric and heterogeneous behaviour under seismic loading. In particular, they feature distinct seismic damage modes along the two principal axes, i.e. out-of-plane bending failure in the weak-axis direction versus in-plane shear failure in the strong-axis direction. Such a complex seismic behaviour is combined with the fact that earthquake ground excitations may cause the bridge pier wall to respond in any non-principal direction that couples out-of-plane bending with in-plane shear. Despite this complexity, seismic responses of highway bridges designed with pier walls have rarely been examined in the literature. This study fills the research gap by analysing the seismic performance of a wall-pier bridge using nonlinear time history analyses (NTHAs). A high-fidelity finite element model of the wall-pier bridge is developed using OpenSees, where modelling considerations for different bridge components are discussed in detail. Specifically, fibre-type displacement-based beam-column elements are utilised to simulate the bending and shear behaviour of the wall pier along the two principal directions. The effectiveness of using this modelling strategy is validated against previous experimental results. Besides, zero-length spring elements with various force–displacement constitutive models are used to capture the dynamic interplay of abutment components and bridge foundations. Representative ground motion records are selected to perform NTHAs on the numerical model of the bridge system. Finally, the time history force–displacement hysteretic responses of various bridge components are investigated, focusing on the pier wall performance along different response directions. This study lays a technical foundation for the earthquake engineering community to analyse, design, and protect wall-pier highway bridges against seismic hazards.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Highway bridges},\n%keywords = {Abutments (bridge);Bridge approaches;Bridge piers;Earthquake effects;Municipal engineering;Seismic design;Seismic response;},\n%note = {Bridge systems;Force displacement;In-plane shear;Nonlinear time history analysis;Out-of-plane bending;Out-of-plane flexures;Principal directions;Seismic response analysis;Wall pier;Wall-pier highway bridge;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61531-3_22},\n} \n\n\n
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Wall-pier highway bridge is one major bridge type in seismic zones around the globe. Unlike well-designed bridge columns dominated by seismic flexural damage, pier walls in a bridge system exhibit unsymmetric and heterogeneous behaviour under seismic loading. In particular, they feature distinct seismic damage modes along the two principal axes, i.e. out-of-plane bending failure in the weak-axis direction versus in-plane shear failure in the strong-axis direction. Such a complex seismic behaviour is combined with the fact that earthquake ground excitations may cause the bridge pier wall to respond in any non-principal direction that couples out-of-plane bending with in-plane shear. Despite this complexity, seismic responses of highway bridges designed with pier walls have rarely been examined in the literature. This study fills the research gap by analysing the seismic performance of a wall-pier bridge using nonlinear time history analyses (NTHAs). A high-fidelity finite element model of the wall-pier bridge is developed using OpenSees, where modelling considerations for different bridge components are discussed in detail. Specifically, fibre-type displacement-based beam-column elements are utilised to simulate the bending and shear behaviour of the wall pier along the two principal directions. The effectiveness of using this modelling strategy is validated against previous experimental results. Besides, zero-length spring elements with various force–displacement constitutive models are used to capture the dynamic interplay of abutment components and bridge foundations. Representative ground motion records are selected to perform NTHAs on the numerical model of the bridge system. Finally, the time history force–displacement hysteretic responses of various bridge components are investigated, focusing on the pier wall performance along different response directions. This study lays a technical foundation for the earthquake engineering community to analyse, design, and protect wall-pier highway bridges against seismic hazards.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Buffeting Response of a Long-Suspension Bridge Considering the Effects of a Changing Climate.\n \n \n \n \n\n\n \n Allard, L.; and Snaiki, R.\n\n\n \n\n\n\n In volume 504 LNCE, pages 225 - 236, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"BuffetingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20243917080581 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Buffeting Response of a Long-Suspension Bridge Considering the Effects of a Changing Climate},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Allard, Laurent and Snaiki, Reda},\nvolume = {504 LNCE},\nyear = {2024},\npages = {225 - 236},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">With the continuous increase of the suspension bridge spans, the wind-induced vibrations will pose serious problems to the structural integrity and serviceability. Among the many vibration sources of long-span bridges, buffeting, which results from the impinging turbulence, affects the fatigue life of the bridge structure and might lead, when coupled with other wind-induced loads, to severe structural problems. With climate change, the buffeting-induced risk might significantly increase due to higher wind speeds and turbulence intensities. Therefore, it is important to assess the buffeting response under changing climate scenarios. In this study, the buffeting response of a single-span suspension bridge is investigated in the frequency domain under the worst-case climate scenario RCP 8.5 using the quasi-steady theory and the strip assumption. The performance-based wind engineering approach is implemented here to evaluate the risk values corresponding to several limit states. The suspension bridge is modeled based on the theory of continuous beams. The velocity fluctuations were generated based on the von Karman spectrum. The lateral, vertical, and torsional displacement response spectrums were generated. The simulation results indicated a significant increase in the buffeting response of a long-suspension bridge because of climate change.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Suspension bridges},\n%keywords = {Bridge approaches;Structural dynamics;Suspensions (components);Vibrations (mechanical);},\n%note = {Bridge spans;Bridge structures;Buffeting response;Changing climate;Climate scenarios;Long suspension bridges;Long-span bridge;Performance based design;Vibration sources;Wind induced vibrations;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61527-6_17},\n} \n\n\n
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With the continuous increase of the suspension bridge spans, the wind-induced vibrations will pose serious problems to the structural integrity and serviceability. Among the many vibration sources of long-span bridges, buffeting, which results from the impinging turbulence, affects the fatigue life of the bridge structure and might lead, when coupled with other wind-induced loads, to severe structural problems. With climate change, the buffeting-induced risk might significantly increase due to higher wind speeds and turbulence intensities. Therefore, it is important to assess the buffeting response under changing climate scenarios. In this study, the buffeting response of a single-span suspension bridge is investigated in the frequency domain under the worst-case climate scenario RCP 8.5 using the quasi-steady theory and the strip assumption. The performance-based wind engineering approach is implemented here to evaluate the risk values corresponding to several limit states. The suspension bridge is modeled based on the theory of continuous beams. The velocity fluctuations were generated based on the von Karman spectrum. The lateral, vertical, and torsional displacement response spectrums were generated. The simulation results indicated a significant increase in the buffeting response of a long-suspension bridge because of climate change.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Comparison of Various Walking Load Models in Predicting the Dynamic Behavior of Lightweight Pedestrian Bridges.\n \n \n \n \n\n\n \n Dallali, E. G.; and Dey, P.\n\n\n \n\n\n\n In volume 504 LNCE, pages 73 - 84, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"ComparisonPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917080570 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Comparison of Various Walking Load Models in Predicting the Dynamic Behavior of Lightweight Pedestrian Bridges},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Dallali, Elyar Ghaffarian and Dey, Pampa},\nvolume = {504 LNCE},\nyear = {2024},\npages = {73 - 84},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">With the growing use of high-strength and lightweight materials for sustainable constructions, vibration serviceability often governs the design of such structures, specifically for pedestrian bridges under human-induced walking excitations. To better design lightweight pedestrian bridges, it is necessary to accurately predict human-induced excitations. To this end, the periodic moving force model has been highly accepted by the existing design codes around the world because of its simplicity of calculation. However, the capability of this modeling approach to realistically predict the vibration response of lightweight pedestrian bridges is debatable. More accurate modeling approaches have also been proposed in the literature based on human walking dynamics such as the mass–spring–damper and bi-pedal models that can capture the human–structure interaction phenomena. However, none of such models has been validated for lightweight pedestrian bridges. This study aims at evaluating these models for their capability in predicting the vibration response of lightweight bridges. In particular, the numerical responses have been estimated for the mass–spring–damper and the moving force models and compared with experimental observations from an aluminum pedestrian bridge under single-person walking loads. A comparison study between the performances of these two modeling approaches has also been undertaken to identify the better load model for lightweight pedestrian bridges. In the future, this study will be extended to other modern modeling approaches of walking loads as well as for crowd excitations including the human–structure interaction phenomena.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Footbridges},\n%keywords = {Aluminum bridges;Bridge approaches;Digital elevation model;Structural dynamics;Vibration analysis;},\n%note = {Biomechanical model;Force modeling;Human-structure interaction;Lightweight footbridge;Load modeling;Mass spring damper;Modeling approach;Moving forces;Vibration response;Walking loads;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61527-6_6},\n} \n\n\n
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With the growing use of high-strength and lightweight materials for sustainable constructions, vibration serviceability often governs the design of such structures, specifically for pedestrian bridges under human-induced walking excitations. To better design lightweight pedestrian bridges, it is necessary to accurately predict human-induced excitations. To this end, the periodic moving force model has been highly accepted by the existing design codes around the world because of its simplicity of calculation. However, the capability of this modeling approach to realistically predict the vibration response of lightweight pedestrian bridges is debatable. More accurate modeling approaches have also been proposed in the literature based on human walking dynamics such as the mass–spring–damper and bi-pedal models that can capture the human–structure interaction phenomena. However, none of such models has been validated for lightweight pedestrian bridges. This study aims at evaluating these models for their capability in predicting the vibration response of lightweight bridges. In particular, the numerical responses have been estimated for the mass–spring–damper and the moving force models and compared with experimental observations from an aluminum pedestrian bridge under single-person walking loads. A comparison study between the performances of these two modeling approaches has also been undertaken to identify the better load model for lightweight pedestrian bridges. In the future, this study will be extended to other modern modeling approaches of walking loads as well as for crowd excitations including the human–structure interaction phenomena.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Analysis of Radarsat Constellation Mission Compact Polarimetric Data for Crop Monitoring.\n \n \n \n \n\n\n \n Mookkuthala Erkaramana, B. P.; Goita, K.; Magagi, R.; and Wang, H.\n\n\n \n\n\n\n In pages 1460 - 1464, Athens, Greece, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"AnalysisPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917115303 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Analysis of Radarsat Constellation Mission Compact Polarimetric Data for Crop Monitoring},\njournal = {International Geoscience and Remote Sensing Symposium (IGARSS)},\nauthor = {Mookkuthala Erkaramana, Bhanu Prakash and Goita, Kalifa and Magagi, Ramata and Wang, Hongquan},\nyear = {2024},\npages = {1460 - 1464},\naddress = {Athens, Greece},\nabstract = {<div data-language="eng" data-ev-field="abstract">The compact polarimetric (CP) product of RADARSAT Constellation Mission (RCM) launched by the Canadian Space Agency (CSA) has wide swath and high temporal resolution which helps in continuous agriculture monitoring. Here, we evaluated the potential of RCM CP SAR product in ScanSAR mode to monitor different crops during the phenological cycle. For this study, we have selected the agriculture fields belonging to Agriculture and Agri-Food Canada (AAFC), Lennoxville, Quebec, Canada. We derived various CP parameters such as Stokes parameters, m-chi decomposition, CP Radar Vegetation Index (CpRVI), degree of polarization (DoP), conformity etc., from the RCM CP data. We analyzed their capabilities for crop monitoring with the help of in-situ measurements collected during the intensive field campaign conducted in summer 2022 and 2023. The results are analyzed considering strong effects of incidence angle on the CP parameters during the phenological cycle.<br/></div> © 2024 IEEE.},\nURL = {http://dx.doi.org/10.1109/IGARSS53475.2024.10641414},\n} \n\n\n
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The compact polarimetric (CP) product of RADARSAT Constellation Mission (RCM) launched by the Canadian Space Agency (CSA) has wide swath and high temporal resolution which helps in continuous agriculture monitoring. Here, we evaluated the potential of RCM CP SAR product in ScanSAR mode to monitor different crops during the phenological cycle. For this study, we have selected the agriculture fields belonging to Agriculture and Agri-Food Canada (AAFC), Lennoxville, Quebec, Canada. We derived various CP parameters such as Stokes parameters, m-chi decomposition, CP Radar Vegetation Index (CpRVI), degree of polarization (DoP), conformity etc., from the RCM CP data. We analyzed their capabilities for crop monitoring with the help of in-situ measurements collected during the intensive field campaign conducted in summer 2022 and 2023. The results are analyzed considering strong effects of incidence angle on the CP parameters during the phenological cycle.
© 2024 IEEE.\n
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\n \n\n \n \n \n \n \n \n Efficient Seismic Fragility Assessment Through Active Learning and Gaussian Process Regression.\n \n \n \n \n\n\n \n Ning, C.; and Xie, Y.\n\n\n \n\n\n\n In volume 504 LNCE, pages 1 - 13, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"EfficientPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917080565 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Efficient Seismic Fragility Assessment Through Active Learning and Gaussian Process Regression},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Ning, Chunxiao and Xie, Yazhou},\nvolume = {504 LNCE},\nyear = {2024},\npages = {1 - 13},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Seismic fragility models quantify the damage and collapse exceedance probabilities of civil engineering structures under varying levels of seismic hazards. Fragility assessment plays an important role in both probabilistic seismic risk assessment and performance-based seismic design. Developing accurate and robust seismic fragility models is computationally demanding, as numerous nonlinear time history analyses (NLTHAs) are needed to capture all sources of uncertainties embedded in earthquake loads, structural geometry, material properties, design details, etc. In this regard, this study leverages active learning (AL) and Gaussian process regression (GPR) to efficiently develop seismic fragility models without conducting exhaustive NLTHAs. In particular, the GPR predicts the mean and variance of structural responses conditioned on input features (i.e. structural parameters and seismic intensity measures), from which fragility curves are constructed by convolving the probabilistic seismic demand models with capacity limit state models. Furthermore, the AL algorithm recursively selects the optimal set of motion-structure samples to carry out the least number of NLTHAs for training against the GPR-based fragility model. The accuracy and efficiency of the proposed AL-GPR scheme are demonstrated using a benchmark highway bridge class. First, the GPR-based fragility model shows superior damage/failure exceedance probability inference when compared with conventional approaches. Besides, the seismic fragility model trained on a minimal subset of AL-selected NLTHAs achieves comparable performance as the original model using 1950 samples. This research develops an advanced machine learning technique to efficiently and reliably assess the seismic fragility of structures, which tackles one crucial computational challenge to facilitate high-resolution regional seismic risk assessment of existing structures and performance-based seismic design of new structures.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Risk assessment},\n%keywords = {Earthquake effects;Gaussian distribution;Highway bridges;Regression analysis;Seismic design;Seismic response;Structural analysis;},\n%note = {Active Learning;Active-learning process;Civil engineering structures;Exceedance probability;Fragility assessment;Gaussian process regression;Nonlinear time history analysis;Performance based seismic design;Seismic fragility;Seismic fragility assessment;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61527-6_1},\n} \n\n\n
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Seismic fragility models quantify the damage and collapse exceedance probabilities of civil engineering structures under varying levels of seismic hazards. Fragility assessment plays an important role in both probabilistic seismic risk assessment and performance-based seismic design. Developing accurate and robust seismic fragility models is computationally demanding, as numerous nonlinear time history analyses (NLTHAs) are needed to capture all sources of uncertainties embedded in earthquake loads, structural geometry, material properties, design details, etc. In this regard, this study leverages active learning (AL) and Gaussian process regression (GPR) to efficiently develop seismic fragility models without conducting exhaustive NLTHAs. In particular, the GPR predicts the mean and variance of structural responses conditioned on input features (i.e. structural parameters and seismic intensity measures), from which fragility curves are constructed by convolving the probabilistic seismic demand models with capacity limit state models. Furthermore, the AL algorithm recursively selects the optimal set of motion-structure samples to carry out the least number of NLTHAs for training against the GPR-based fragility model. The accuracy and efficiency of the proposed AL-GPR scheme are demonstrated using a benchmark highway bridge class. First, the GPR-based fragility model shows superior damage/failure exceedance probability inference when compared with conventional approaches. Besides, the seismic fragility model trained on a minimal subset of AL-selected NLTHAs achieves comparable performance as the original model using 1950 samples. This research develops an advanced machine learning technique to efficiently and reliably assess the seismic fragility of structures, which tackles one crucial computational challenge to facilitate high-resolution regional seismic risk assessment of existing structures and performance-based seismic design of new structures.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Cracking Behaviour of Concrete Tensile Members Reinforced with Ribbed GFRP Rebars.\n \n \n \n \n\n\n \n Shabani, H.; Habibi, O.; Asadian, A.; and Galal, K.\n\n\n \n\n\n\n In volume 504 LNCE, pages 273 - 284, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"CrackingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917080585 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Cracking Behaviour of Concrete Tensile Members Reinforced with Ribbed GFRP Rebars},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Shabani, Hamed and Habibi, Omid and Asadian, Alireza and Galal, Khaled},\nvolume = {504 LNCE},\nyear = {2024},\npages = {273 - 284},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Glass fibre-reinforced polymer (GFRP) rebars are an alternative to steel rebar for applications prone to corrosion. Limiting the maximum crack width of GFRP-reinforced concrete (RC) elements is one of the main criteria that governs their design. However, there is still limited knowledge of the cracking behaviour and crack width prediction of GFRP RC elements. This paper presents the results of a pilot study on the behaviour of six 1000 mm long reinforced concrete prisms tested under uniaxial tension. The aim of the study is to evaluate the crack development of ribbed GFRP RC structural members. The effects of different variables, such as the concrete prism cross-Sect. (90 × 90 mm and 150  × 150 mm), rebar type (steel and GFRP), and rebar diameter (16 and 19 mm), on the crack width and crack spacing were studied. The experimental results are compared with assumptions of available design codes and guidelines. Moreover, different approaches to predicting crack spacing and crack width are discussed. The results indicate that the reinforcement ratio has a significant influence on the load‒deformation response as well as crack spacing.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Glass fibers},\n%keywords = {Elastomers;Fiber reinforced concrete;Glass fiber reinforced plastics;Mortar;Rebar;Steel fibers;Structural members;Well spacing;},\n%note = {Crack spacing;Crack-width;Cracking behavior;Glassfiber reinforced polymers (GFRP);Polymer rebars;Reinforced concrete elements;Ribbed glass fiber-reinforced polymer;Steel rebars;Tensile behaviors;Tensile members;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61527-6_21},\n} \n\n\n
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Glass fibre-reinforced polymer (GFRP) rebars are an alternative to steel rebar for applications prone to corrosion. Limiting the maximum crack width of GFRP-reinforced concrete (RC) elements is one of the main criteria that governs their design. However, there is still limited knowledge of the cracking behaviour and crack width prediction of GFRP RC elements. This paper presents the results of a pilot study on the behaviour of six 1000 mm long reinforced concrete prisms tested under uniaxial tension. The aim of the study is to evaluate the crack development of ribbed GFRP RC structural members. The effects of different variables, such as the concrete prism cross-Sect. (90 × 90 mm and 150  × 150 mm), rebar type (steel and GFRP), and rebar diameter (16 and 19 mm), on the crack width and crack spacing were studied. The experimental results are compared with assumptions of available design codes and guidelines. Moreover, different approaches to predicting crack spacing and crack width are discussed. The results indicate that the reinforcement ratio has a significant influence on the load‒deformation response as well as crack spacing.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n An Innovative Seismic Force Resisting System for Damage-Free Self-centring Elastic Response of Low-Rise Steel Building Structures.\n \n \n \n \n\n\n \n Tremblay, R.\n\n\n \n\n\n\n In volume 504 LNCE, pages 409 - 422, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917080595 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An Innovative Seismic Force Resisting System for Damage-Free Self-centring Elastic Response of Low-Rise Steel Building Structures},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Tremblay, Robert},\nvolume = {504 LNCE},\nyear = {2024},\npages = {409 - 422},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">An innovative braced frame system is proposed to develop nonlinear elastic self-centring response for low-rise steel building structures for which enhanced seismic performance is required. The system comprises an inverted-V-bracing with brace-to-beam connections at the first level that are detailed to transmit compression loads by direct bearing and open under tension load. Energy is dissipated by friction upon gap opening and closing in the connections. This behaviour intentionally reduces the stiffness of the first storey that acts similar to a base isolation system for the building. V-braces connected to the floor beams are also provided in the first storey to develop sufficient effective stiffness upon activation of the inverted-V-braced frame nonlinear response. This new system is first described, together with the equations that can be used to calculate the first-storey effective period and equivalent viscous damping properties that are needed to control the building lateral displacements. The system is then used for two- and three-storey buildings located in Montreal, QC, and Vancouver, BC. Nonlinear response history analyses are then performed to examine its seismic response under design level ground motions. The results show that the system can exhibit enhanced seismic performance in terms of peak lateral displacements and peak horizontal floor and roof accelerations, with no structural damage nor residual deformation. This exploratory study also shows that peak lateral displacements can be reliably predicted using the simple single-mode method for base isolation systems.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Floors},\n%keywords = {Connectors (structural);Partitions (building);Seismic design;Seismic response;Steel structures;Structural frames;Tall buildings;},\n%note = {Base isolation systems;Braced frame;Lateral displacements;Residual deformation;Seismic forces;Seismic Performance;Self centering;Self-centering response;Steel braced frames;Steel Building Structures;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61527-6_31},\n} \n\n\n
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An innovative braced frame system is proposed to develop nonlinear elastic self-centring response for low-rise steel building structures for which enhanced seismic performance is required. The system comprises an inverted-V-bracing with brace-to-beam connections at the first level that are detailed to transmit compression loads by direct bearing and open under tension load. Energy is dissipated by friction upon gap opening and closing in the connections. This behaviour intentionally reduces the stiffness of the first storey that acts similar to a base isolation system for the building. V-braces connected to the floor beams are also provided in the first storey to develop sufficient effective stiffness upon activation of the inverted-V-braced frame nonlinear response. This new system is first described, together with the equations that can be used to calculate the first-storey effective period and equivalent viscous damping properties that are needed to control the building lateral displacements. The system is then used for two- and three-storey buildings located in Montreal, QC, and Vancouver, BC. Nonlinear response history analyses are then performed to examine its seismic response under design level ground motions. The results show that the system can exhibit enhanced seismic performance in terms of peak lateral displacements and peak horizontal floor and roof accelerations, with no structural damage nor residual deformation. This exploratory study also shows that peak lateral displacements can be reliably predicted using the simple single-mode method for base isolation systems.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Impact of Ice, Snow, Wind, and Rain on Swot Water Detection over Canadian Lakes during Cal/Val.\n \n \n \n \n\n\n \n Trudel, M.; Gribi, T.; Siles, G.; Biancamaria, S.; and Fjortoft, R.\n\n\n \n\n\n\n In pages 3180 - 3183, Athens, Greece, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917114819 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact of Ice, Snow, Wind, and Rain on Swot Water Detection over Canadian Lakes during Cal/Val},\njournal = {International Geoscience and Remote Sensing Symposium (IGARSS)},\nauthor = {Trudel, M. and Gribi, T. and Siles, G. and Biancamaria, S. and Fjortoft, R.},\nyear = {2024},\npages = {3180 - 3183},\naddress = {Athens, Greece},\nabstract = {<div data-language="eng" data-ev-field="abstract">The SWOT satellite is a near-nadir Ka-band interferometric radar, capable of monitoring water bodies larger than 6 ha. Launched in December 2022, the satellite was in a calibration/validation orbit until July 2023, where it acquired measurements every day over certain regions. Canadian lakes were ice-covered at the start of the calibration period, offering the opportunity to study the Ka-band backscatter in the presence of ice and snow. The SWOT signal is also affected when the water surface is very smooth (e.g. in the absence of wind), or attenuated by heavy precipitation. These preliminary results demonstrate for the first time the impact of ice, snow, wind, and rain on the detection of water bodies by the SWOT satellite signal.<br/></div> © 2024 IEEE.},\nURL = {http://dx.doi.org/10.1109/IGARSS53475.2024.10641139},\n} \n\n\n
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The SWOT satellite is a near-nadir Ka-band interferometric radar, capable of monitoring water bodies larger than 6 ha. Launched in December 2022, the satellite was in a calibration/validation orbit until July 2023, where it acquired measurements every day over certain regions. Canadian lakes were ice-covered at the start of the calibration period, offering the opportunity to study the Ka-band backscatter in the presence of ice and snow. The SWOT signal is also affected when the water surface is very smooth (e.g. in the absence of wind), or attenuated by heavy precipitation. These preliminary results demonstrate for the first time the impact of ice, snow, wind, and rain on the detection of water bodies by the SWOT satellite signal.
© 2024 IEEE.\n
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\n \n\n \n \n \n \n \n \n Development of an Alternative Design Method for Aluminum I-Sections Using the Overall Interaction Concept.\n \n \n \n \n\n\n \n Verma, P.; Coderre, T.; Dahboul, S.; Li, L.; Dey, P.; and Boissonnade, N.\n\n\n \n\n\n\n In volume 504 LNCE, pages 393 - 407, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"DevelopmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917080594 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Development of an Alternative Design Method for Aluminum I-Sections Using the Overall Interaction Concept},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Verma, Prachi and Coderre, Tristan and Dahboul, Sahar and Li, Liya and Dey, Pampa and Boissonnade, Nicolas},\nvolume = {504 LNCE},\nyear = {2024},\npages = {393 - 407},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Aluminum can be successfully used as a structural material as it has numerous positive attributes such as high strength-to-weight ratio, excellent corrosion resistance, and environmental benefits. The current aluminum design provisions are based on simplified approach that does not efficiently consider the effect of strain hardening, local instabilities, and heat reduced properties of aluminum. This results in over-conservative designs which are not desirable from a cost standpoint. Hence, an optimized design approach is needed for accurately predicting the resistance of aluminum sections that can ensure the full economic benefits of having aluminum as a construction material for civil infrastructure. In this study, an attempt has been made to develop an alternative design approach for aluminum I-sections, based on the principles of Overall Interaction Concept (O.I.C.). This O.I.C.-based design approach helps us obtain precise and consistent estimation of buckling resistance as it relies upon the interaction between resistance and stability and considers geometrical and material imperfections in design. In this study, a finite element-based numerical model is developed in Abaqus software to predict the resistance of aluminum I-shaped cross sections. Extensive numerical parametric studies have also been performed to study the effect of geometries (size and thickness of section), alloys, and load cases on the value of resistance. Using the results from parametric studies (nearly 4500 simulations), O.I.C.-based design proposals have then been formulated to obtain the local resistance of extruded and welded aluminum I-sections. Finally, the estimated resistance from the O.I.C.-based design approach has been compared to that from existing design standards. It is found that the O.I.C.-based design proposals are more accurate than current design standards.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Aluminum corrosion},\n%keywords = {ABAQUS;Aluminum alloys;Aluminum cladding;Buckling;Buckling loads;Corrosion resistance;Corrosion resistant alloys;Heat resistance;Local buckling;Strain hardening;Structural design;},\n%note = {Buckling resistance;Concept-based;Design approaches;Geometric imperfection;Heat reduced property;I-sections;Interaction concepts;Local instability;Overall interaction concept;Property;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61527-6_30},\n} \n\n\n
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Aluminum can be successfully used as a structural material as it has numerous positive attributes such as high strength-to-weight ratio, excellent corrosion resistance, and environmental benefits. The current aluminum design provisions are based on simplified approach that does not efficiently consider the effect of strain hardening, local instabilities, and heat reduced properties of aluminum. This results in over-conservative designs which are not desirable from a cost standpoint. Hence, an optimized design approach is needed for accurately predicting the resistance of aluminum sections that can ensure the full economic benefits of having aluminum as a construction material for civil infrastructure. In this study, an attempt has been made to develop an alternative design approach for aluminum I-sections, based on the principles of Overall Interaction Concept (O.I.C.). This O.I.C.-based design approach helps us obtain precise and consistent estimation of buckling resistance as it relies upon the interaction between resistance and stability and considers geometrical and material imperfections in design. In this study, a finite element-based numerical model is developed in Abaqus software to predict the resistance of aluminum I-shaped cross sections. Extensive numerical parametric studies have also been performed to study the effect of geometries (size and thickness of section), alloys, and load cases on the value of resistance. Using the results from parametric studies (nearly 4500 simulations), O.I.C.-based design proposals have then been formulated to obtain the local resistance of extruded and welded aluminum I-sections. Finally, the estimated resistance from the O.I.C.-based design approach has been compared to that from existing design standards. It is found that the O.I.C.-based design proposals are more accurate than current design standards.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Preliminary Investigation on the Compressive Strength of Built-Up Compression Members of the Original Champlain Bridge.\n \n \n \n \n\n\n \n Wack, M. C. M.; Chhoeng, O.; Inamasu, H.; Boissonnade, N.; and Tremblay, R.\n\n\n \n\n\n\n In volume 504 LNCE, pages 31 - 44, Moncton, NB, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"PreliminaryPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917080567 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Preliminary Investigation on the Compressive Strength of Built-Up Compression Members of the Original Champlain Bridge},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Wack, Morane Chloe Mefande and Chhoeng, Oudom and Inamasu, Hiroyuki and Boissonnade, Nicolas and Tremblay, Robert},\nvolume = {504 LNCE},\nyear = {2024},\npages = {31 - 44},\nissn = {23662557},\naddress = {Moncton, NB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study describes a preliminary evaluation of the compressive resistance of built-up members used in steel trusses of an old long-span bridge. This study is part of the research and development programs on the deconstruction of the original Champlain bridge initiated by Jacques Cartier and Champlain Bridges Inc. (JCCBI). Finite element analysis was performed on 14 built-up truss member specimens to be extracted from the Champlain bridge to determine their compressive behaviour and ultimate strength under compression loading. The examined members are made of two face-to-face channels, or four angles connected by batten plates. The analyses accounted for material and geometric nonlinearities. Local and global geometric imperfections were also considered; however, residual stresses were not incorporated in this preliminary exploratory investigation. All members were assumed to be pinned at their ends to reflect the conditions that will be imposed in the planned experimental program. The compressive behaviour and ultimate capacities from the numerical simulations are compared with the predictions from the equations for built-up members that are provided in the 2020 AASHTO LRFD bridge Design Specifications in the U.S. The comparison shows a good correlation for most of the members examined. In the case of built-up members with slender elements, significant differences were observed between the numerical simulations and the code predictions, which is attributed to the fact that local buckling and its interaction with other buckling modes are not well addressed in current code provisions for this type of members.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Local buckling},\n%keywords = {Buckling;Buckling behavior;Buckling loads;Buckling modes;Compressive strength;Trusses;},\n%note = {Built-up member;Champlain;Component buckling;Compound buckling;Compressive behavior;Geometric imperfection;Global buckling;Local buckling;Steel build-up member;Steel built-up;},\nURL = {http://dx.doi.org/10.1007/978-3-031-61527-6_3},\n} \n\n\n
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This study describes a preliminary evaluation of the compressive resistance of built-up members used in steel trusses of an old long-span bridge. This study is part of the research and development programs on the deconstruction of the original Champlain bridge initiated by Jacques Cartier and Champlain Bridges Inc. (JCCBI). Finite element analysis was performed on 14 built-up truss member specimens to be extracted from the Champlain bridge to determine their compressive behaviour and ultimate strength under compression loading. The examined members are made of two face-to-face channels, or four angles connected by batten plates. The analyses accounted for material and geometric nonlinearities. Local and global geometric imperfections were also considered; however, residual stresses were not incorporated in this preliminary exploratory investigation. All members were assumed to be pinned at their ends to reflect the conditions that will be imposed in the planned experimental program. The compressive behaviour and ultimate capacities from the numerical simulations are compared with the predictions from the equations for built-up members that are provided in the 2020 AASHTO LRFD bridge Design Specifications in the U.S. The comparison shows a good correlation for most of the members examined. In the case of built-up members with slender elements, significant differences were observed between the numerical simulations and the code predictions, which is attributed to the fact that local buckling and its interaction with other buckling modes are not well addressed in current code provisions for this type of members.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Vibration Analysis of Light Rail Transit (LRT) Bridge Supported on Rocking Pier(s) and Isolated Abutments.\n \n \n \n \n\n\n \n Saifuzzaman, M.; Islam, K.; Alam, M. S.; and Tremblay, R.\n\n\n \n\n\n\n In volume 512 LNCE, pages 69 - 77, Dhaka, Bangladesh, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"VibrationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243616971783 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Vibration Analysis of Light Rail Transit (LRT) Bridge Supported on Rocking Pier(s) and Isolated Abutments},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Saifuzzaman, Mohammad and Islam, Kamrul and Alam, M. Shahria and Tremblay, Robert},\nvolume = {512 LNCE},\nyear = {2024},\npages = {69 - 77},\nissn = {23662557},\naddress = {Dhaka, Bangladesh},\nabstract = {<div data-language="eng" data-ev-field="abstract">Light rail transit (LRT) is a popular mode of transportation in modern metropolitan areas. In LRT systems, trains run on tracks over elevated guideways, streets, or combinations of both. The passengers inside the train feel vibrations due to the vibration of the train, tracks, and bridge while the train is running on the bridge/elevated guideway. In order to determine passenger comfort, vibration analysis is often required if a fundamental vertical flexural frequency of the bridge is less than 3.0–4.0 Hz (usually specified by the owner). Passenger comfort increases with decreasing vertical acceleration inside the train and vice versa. In accordance with Eurocode EN 1990:2002, Table A2.9, recommended levels of comfort (vertical accelerations) are usually followed. These levels of comfort and associated limiting values may be further defined by the owner for the individual project. Per Eurocode, vertical acceleration less than 1.0 m/s<sup>2</sup> is very good, and more than 2.0 m/s<sup>2</sup> is unacceptable. The vertical acceleration of the train is a function of vehicle speed, mass of the coach and bridge, and stiffness and damping of the primary and secondary springs of the coach, tracks, bridge, and soil. Therefore, train–track–bridge–soil interaction (TTBSI) analysis is required to determine the vertical acceleration of the train in other words passenger comfort. In this parametric study, a two-span LRT bridge supported on rocking pier and isolated abutments is chosen to demonstrate these interactions; however, the TTBSI analysis is applicable for any conventional bridges. This paper presents train–track–bridge–soil interaction analysis of a bridge. This study is intended to be a reference for bridge designers and owners to provide a step-by-step procedure for TTBSI analyses.<br/></div> © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.},\nkey = {Light rail transit},\n%keywords = {Abutments (bridge);Bridge piers;Electric current collection;Guideways;Railroad bridges;Railroad tracks;Vibration analysis;},\n%note = {Interaction analysis;Isolated abutment;Light rail;Passengers comfort;Rocking pier;Soil interaction;Train tracks;Train–track–bridge–soil interaction;Vertical accelerations;Vibrations analysis;},\nURL = {http://dx.doi.org/10.1007/978-3-031-63280-8_8},\n} \n\n\n
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Light rail transit (LRT) is a popular mode of transportation in modern metropolitan areas. In LRT systems, trains run on tracks over elevated guideways, streets, or combinations of both. The passengers inside the train feel vibrations due to the vibration of the train, tracks, and bridge while the train is running on the bridge/elevated guideway. In order to determine passenger comfort, vibration analysis is often required if a fundamental vertical flexural frequency of the bridge is less than 3.0–4.0 Hz (usually specified by the owner). Passenger comfort increases with decreasing vertical acceleration inside the train and vice versa. In accordance with Eurocode EN 1990:2002, Table A2.9, recommended levels of comfort (vertical accelerations) are usually followed. These levels of comfort and associated limiting values may be further defined by the owner for the individual project. Per Eurocode, vertical acceleration less than 1.0 m/s2 is very good, and more than 2.0 m/s2 is unacceptable. The vertical acceleration of the train is a function of vehicle speed, mass of the coach and bridge, and stiffness and damping of the primary and secondary springs of the coach, tracks, bridge, and soil. Therefore, train–track–bridge–soil interaction (TTBSI) analysis is required to determine the vertical acceleration of the train in other words passenger comfort. In this parametric study, a two-span LRT bridge supported on rocking pier and isolated abutments is chosen to demonstrate these interactions; however, the TTBSI analysis is applicable for any conventional bridges. This paper presents train–track–bridge–soil interaction analysis of a bridge. This study is intended to be a reference for bridge designers and owners to provide a step-by-step procedure for TTBSI analyses.
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.\n
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\n \n\n \n \n \n \n \n \n An Innovative Steel Braced Frame System for Controlled Self-Centring Elastic Seismic Response of Low-Rise Steel Building Structures.\n \n \n \n \n\n\n \n Tremblay, R.\n\n\n \n\n\n\n In volume 511 LNCE, pages 1 - 13, Dhaka, Bangladesh, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243717037526 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An Innovative Steel Braced Frame System for Controlled Self-Centring Elastic Seismic Response of Low-Rise Steel Building Structures},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Tremblay, Robert},\nvolume = {511 LNCE},\nyear = {2024},\npages = {1 - 13},\nissn = {23662557},\naddress = {Dhaka, Bangladesh},\nabstract = {<div data-language="eng" data-ev-field="abstract">An innovative steel braced frame system is introduced that is designed and detailed to exhibit an elastic self-centring hysteretic response and achieve damage-free seismic response for low-rise building structures. The system is implemented in the first storey of buildings so that all seismic-induced deformations intentionally develop in that storey to obtain a seismic response similar to that offered by base isolation systems. The proposed system is first described together with a design approach that is based on the single-mode analysis method widely adopted for the design of base isolation systems. The system is applied for two- to three-storey office buildings located in the high seismicity region of Vancouver, British Columbia, Canada, where the seismic hazard is contributed by shallow crustal, deep in-slab, and interface subduction earthquakes. Nonlinear response history analysis is performed under site representative ground motion records to verify the seismic performance of the proposed system. The study shows that the system can exhibit enhanced seismic performance in terms of peak lateral displacements and peak horizontal floor and roof accelerations, with no structural damage nor residual deformations. The results also suggest that peak lateral displacements can be reliably predicted using the simple single-mode method for base isolation systems.<br/></div> © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.},\nkey = {Seismic response},\n%keywords = {Earthquake effects;Floors;Induced Seismicity;Office buildings;Partitions (building);Roofs;Seismic design;Structural frames;Tall buildings;},\n%note = {Base isolation systems;Braced steel frames;Energy;Frame systems;Residual deformation;Seismic Performance;Self centering;Self-centering response;Steel braced frames;Steel Building Structures;},\nURL = {http://dx.doi.org/10.1007/978-3-031-63276-1_1},\n} \n\n\n
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An innovative steel braced frame system is introduced that is designed and detailed to exhibit an elastic self-centring hysteretic response and achieve damage-free seismic response for low-rise building structures. The system is implemented in the first storey of buildings so that all seismic-induced deformations intentionally develop in that storey to obtain a seismic response similar to that offered by base isolation systems. The proposed system is first described together with a design approach that is based on the single-mode analysis method widely adopted for the design of base isolation systems. The system is applied for two- to three-storey office buildings located in the high seismicity region of Vancouver, British Columbia, Canada, where the seismic hazard is contributed by shallow crustal, deep in-slab, and interface subduction earthquakes. Nonlinear response history analysis is performed under site representative ground motion records to verify the seismic performance of the proposed system. The study shows that the system can exhibit enhanced seismic performance in terms of peak lateral displacements and peak horizontal floor and roof accelerations, with no structural damage nor residual deformations. The results also suggest that peak lateral displacements can be reliably predicted using the simple single-mode method for base isolation systems.
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.\n
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\n \n\n \n \n \n \n \n \n Fully Lagrangian mesh-free modelling of river ice interaction with control structures.\n \n \n \n \n\n\n \n Billy, C.; Shakibaeinia, A.; and Ghobrial, T.\n\n\n \n\n\n\n In pages 634 - 638, Kingston, ON, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"FullyPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243516970112 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Fully Lagrangian mesh-free modelling of river ice interaction with control structures},\njournal = {River Flow - Proceedings of the 11th Conference on Fluvial Hydraulics, 2022},\nauthor = {Billy, C. and Shakibaeinia, A. and Ghobrial, T.},\nyear = {2024},\npages = {634 - 638},\naddress = {Kingston, ON, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Cold-region rivers are characterized by ice cover formation and break-up periods that may lead to ice jams and related floods. Ice control structures such as piers and booms are used to prevent jams or move the jam location to further upstream to protect the communities. Understanding and predicting the interaction of ice floes with these structures is essential for the study of their effectiveness and optimizing their designs. However, simulation of such complex multi-physics systems is a challenge for the numerical models. This paper presents a fully Lagrangian mesh-free continuum-discrete model, based on the Smooth Particles Hydrodynamics (SPH) method and Discrete Element Method (DEM) for the problem of ice floes interaction with control structures. The model is validated and evaluated using the data from experiments on ice interaction with piers. The impacts of the flow condition and the physical characteristics of ice and structures are also investigated.<br/></div> © 2024 The Author(s).},\nkey = {Lagrange multipliers},\n%keywords = {Hydrodynamics;Piers;},\n%note = {Cold regions;Control structure;Ice cover;Ice floes;Ice interactions;Ice jams;Lagrangian mesh;Mesh free model;River ice;Up period;},\nURL = {http://dx.doi.org/10.1201/9781003323037-84},\n} \n\n\n
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Cold-region rivers are characterized by ice cover formation and break-up periods that may lead to ice jams and related floods. Ice control structures such as piers and booms are used to prevent jams or move the jam location to further upstream to protect the communities. Understanding and predicting the interaction of ice floes with these structures is essential for the study of their effectiveness and optimizing their designs. However, simulation of such complex multi-physics systems is a challenge for the numerical models. This paper presents a fully Lagrangian mesh-free continuum-discrete model, based on the Smooth Particles Hydrodynamics (SPH) method and Discrete Element Method (DEM) for the problem of ice floes interaction with control structures. The model is validated and evaluated using the data from experiments on ice interaction with piers. The impacts of the flow condition and the physical characteristics of ice and structures are also investigated.
© 2024 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Mesh-free particle methods for simulation of fluvial processes, challenges, and opportunities.\n \n \n \n \n\n\n \n Shakibaeinia, A.; and Jandaghian, M.\n\n\n \n\n\n\n In pages 132 - 136, Kingston, ON, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"Mesh-freePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243516970046 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Mesh-free particle methods for simulation of fluvial processes, challenges, and opportunities},\njournal = {River Flow - Proceedings of the 11th Conference on Fluvial Hydraulics, 2022},\nauthor = {Shakibaeinia, A. and Jandaghian, M.},\nyear = {2024},\npages = {132 - 136},\naddress = {Kingston, ON, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Continuum-based mesh-free particle methods such as Smoothed Particle Hydrodynamics (SPH) and Moving Particle Semi-implicit (MPS) provide the opportunity to simulate the highly dynamic interfacial and free-surfaces flows and the multiphysics interactions, with more accuracy and flexibility than the conventional mesh-based methods, yet with an additional computation cost. Nevertheless, the advancements in high-performance computing techniques and infrastructure, have enabled mesh-free particle methods to be a serious alternative to conventional mesh-based methods for many applications. However, the application of these methods to fluvial processes has been limited. This study reviews and evaluates the applicability and suitability of SPH and MPS (alone or in coupling with other methods) for the simulation of the fluvial processes. The focus will be on fluvial hydrodynamics, sediment dynamics, and ice dynamics. Our latest progress in the applicability of SPH/ MPS to each of these processes is overviewed and the remaining challenges are discussed.<br/></div> © 2024 The Author(s).},\nkey = {Mesh generation},\n%keywords = {Hydrodynamics;},\n%note = {Computation costs;Fluvial process;Free-surface flow;Hydrodynamic particles;Interfacial surface;Mesh-based methods;Mesh-free particle methods;Moving particle semi-implicit;Multi-physics;Smoothed particle hydrodynamics;},\nURL = {http://dx.doi.org/10.1201/9781003323037-18},\n} \n\n\n
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Continuum-based mesh-free particle methods such as Smoothed Particle Hydrodynamics (SPH) and Moving Particle Semi-implicit (MPS) provide the opportunity to simulate the highly dynamic interfacial and free-surfaces flows and the multiphysics interactions, with more accuracy and flexibility than the conventional mesh-based methods, yet with an additional computation cost. Nevertheless, the advancements in high-performance computing techniques and infrastructure, have enabled mesh-free particle methods to be a serious alternative to conventional mesh-based methods for many applications. However, the application of these methods to fluvial processes has been limited. This study reviews and evaluates the applicability and suitability of SPH and MPS (alone or in coupling with other methods) for the simulation of the fluvial processes. The focus will be on fluvial hydrodynamics, sediment dynamics, and ice dynamics. Our latest progress in the applicability of SPH/ MPS to each of these processes is overviewed and the remaining challenges are discussed.
© 2024 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Sediment and chemical transport modeling of a hypothetical tailings dam breach spill in the lower Athabasca River.\n \n \n \n \n\n\n \n Taherparvar, M.; Shakibaeinia, A.; and Dibike, Y.\n\n\n \n\n\n\n In pages 915 - 919, Kingston, ON, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"SedimentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243516970008 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Sediment and chemical transport modeling of a hypothetical tailings dam breach spill in the lower Athabasca River},\njournal = {River Flow - Proceedings of the 11th Conference on Fluvial Hydraulics, 2022},\nauthor = {Taherparvar, M. and Shakibaeinia, A. and Dibike, Y.B.},\nyear = {2024},\npages = {915 - 919},\naddress = {Kingston, ON, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The lower Athabasca River is adjacent to one of the world’s largest sandy oil reserves. While tailings leaks in the event of a tailings dam failure can contaminate the downstream water column in the short term, there is a possibility of chemical adsorption by bed sediments and long-term contamination due to re-suspension of these deposits. This study tries to quantify these effects by numerically modeling the fate of sediments and related chemicals in the river from a hypothetical tailings spill. Numerical modeling is used to study the transport, deposition, and re-suspension of sediments and related chemicals downstream for different scenarios, taking into account historical and future flood events. The results show that a higher percentage of contaminated sediments leave the cloning domain in the first three days, while the rest remain in local sediments. Floods re-suspend some of these sediments and transport them miles downstream in the water column.<br/></div> © 2024 The Author(s).},\nkey = {Suspended sediments},\n%keywords = {Oil spills;River pollution;Rivers;Tailings;},\n%note = {Athabasca;Chemical transport models;Dam breach;Dam failure;Down-stream;Oil reserves;Re-suspension;Sediment transport modelling;Tailing dam;Water columns;},\nURL = {http://dx.doi.org/10.1201/9781003323037-123},\n} \n\n\n
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The lower Athabasca River is adjacent to one of the world’s largest sandy oil reserves. While tailings leaks in the event of a tailings dam failure can contaminate the downstream water column in the short term, there is a possibility of chemical adsorption by bed sediments and long-term contamination due to re-suspension of these deposits. This study tries to quantify these effects by numerically modeling the fate of sediments and related chemicals in the river from a hypothetical tailings spill. Numerical modeling is used to study the transport, deposition, and re-suspension of sediments and related chemicals downstream for different scenarios, taking into account historical and future flood events. The results show that a higher percentage of contaminated sediments leave the cloning domain in the first three days, while the rest remain in local sediments. Floods re-suspend some of these sediments and transport them miles downstream in the water column.
© 2024 The Author(s).\n
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\n \n\n \n \n \n \n \n \n A few-shot learning approach for the segmentation of subsurface defects in thermographic images of concrete structures.\n \n \n \n \n\n\n \n Pozzer, S.; Ramos, G.; Azar, E. R.; Osman, A.; El Refai, A.; Lopez, F.; Ibarra-Castanedo, C.; and Maldague, X.\n\n\n \n\n\n\n In volume 13047, pages The Society of Photo-Optical Instrumentation Engineers (SPIE); TORNGATS - , National Harbor, MD, United states, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243516947697 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A few-shot learning approach for the segmentation of subsurface defects in thermographic images of concrete structures},\njournal = {Proceedings of SPIE - The International Society for Optical Engineering},\nauthor = {Pozzer, Sandra and Ramos, Gabriel and Azar, Ehsan Rezazadeh and Osman, Ahmad and El Refai, Ahmed and Lopez, Fernando and Ibarra-Castanedo, Clemente and Maldague, Xavier},\nvolume = {13047},\nyear = {2024},\npages = {The Society of Photo-Optical Instrumentation Engineers (SPIE); TORNGATS - },\nissn = {0277786X},\naddress = {National Harbor, MD, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">The identification and categorization of subsurface damages in thermal images of concrete structures remain an ongoing challenge that demands expert knowledge. Consequently, creating a substantial number of annotated samples for training deep neural networks poses a significant issue. Artificial intelligence (AI) models particularly encounter the problem of false positives arising from thermal patterns on concrete surfaces that do not correspond to subsurface damages. Such false detections would be easily identifiable in visible images, underscoring the advantage of possessing additional information about the sample surface through visible imaging. In light of these challenges, this study proposes an approach that employs a few-shot learning method known as the Siamese Neural Network (SNN), to frame the problem of subsurface delamination detection in concrete structures as a multi-modal similarity region comparison problem. The proposed procedure is evaluated using a dataset comprising 500 registered pairs of infrared and visible images captured in various infrastructure scenarios. Our findings indicate that leveraging prior knowledge regarding the similarity between visible and thermal data can significantly reduce the rate of false positive detection by AI models in thermal images.<br/></div> © 2024 SPIE.},\nkey = {Semantic Segmentation},\n%keywords = {Concrete buildings;Deep neural networks;Image annotation;Thermography (imaging);},\n%note = {Expert knowledge;Intelligence models;Learning approach;Neural-networks;Non destructive inspection;Semantic segmentation;Siamese neural network;Sub-surface damage;Subsurface defect;Thermal images;},\nURL = {http://dx.doi.org/10.1117/12.3013684},\n} \n\n\n
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The identification and categorization of subsurface damages in thermal images of concrete structures remain an ongoing challenge that demands expert knowledge. Consequently, creating a substantial number of annotated samples for training deep neural networks poses a significant issue. Artificial intelligence (AI) models particularly encounter the problem of false positives arising from thermal patterns on concrete surfaces that do not correspond to subsurface damages. Such false detections would be easily identifiable in visible images, underscoring the advantage of possessing additional information about the sample surface through visible imaging. In light of these challenges, this study proposes an approach that employs a few-shot learning method known as the Siamese Neural Network (SNN), to frame the problem of subsurface delamination detection in concrete structures as a multi-modal similarity region comparison problem. The proposed procedure is evaluated using a dataset comprising 500 registered pairs of infrared and visible images captured in various infrastructure scenarios. Our findings indicate that leveraging prior knowledge regarding the similarity between visible and thermal data can significantly reduce the rate of false positive detection by AI models in thermal images.
© 2024 SPIE.\n
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\n \n\n \n \n \n \n \n On the definition of geometrical imperfections in the F.E. modelling of CHS in compression.\n \n \n \n\n\n \n Echeverri, M.; Rico, P.; Li, L.; Graciano, C.; and Boissonnade, N.\n\n\n \n\n\n\n In San Antonio, TX, United states, 2024. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20242016090463 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {On the definition of geometrical imperfections in the F.E. modelling of CHS in compression},\njournal = {Proceedings of the Annual Stability Conference Structural Stability Research Council, SSRC 2024},\nauthor = {Echeverri, Mariana and Rico, Pablo and Li, Liya and Graciano, Carlos and Boissonnade, Nicolas},\nyear = {2024},\naddress = {San Antonio, TX, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper investigates the local buckling behavior of steel Circular Hollow Sections (CHS). Design recommendations for CHS are known to be somewhat conservative and sometimes inappropriate, namely with respect to section classification. CHS sections also provide a peculiar response to local buckling, being quite sensitive to initial geometrical imperfections (both with respect to their shape and amplitude), as a result of a shell-like response. This paper reports numerical investigations towards a better characterization of initial imperfections in the response of CHS sections under compression. The results of non-linear shell F.E. sensitivity studies on geometrical imperfections are provided, comparing different shapes and amplitudes to literature results. Typically, the introduction of initial imperfections has relied on the first eigenmode; however, the local buckling response can vary significantly compared to experimental stub column tests in some cases, especially for slender sections. Finally, the paper concludes with practical modeling recommendations for more accurate representations of CHS section behavior under compression.<br/></div> © SSRC 2024. All rights reserved.},\nkey = {Buckling},\n%keywords = {Geometry;},\n%note = {Buckling behaviour;Design recommendations;FE modeling;FE-modelling;Geometrical imperfections;Hollow section;Initial geometrical imperfections;Initial imperfection;Local buckling;Numerical investigations;},\n} \n\n\n
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This paper investigates the local buckling behavior of steel Circular Hollow Sections (CHS). Design recommendations for CHS are known to be somewhat conservative and sometimes inappropriate, namely with respect to section classification. CHS sections also provide a peculiar response to local buckling, being quite sensitive to initial geometrical imperfections (both with respect to their shape and amplitude), as a result of a shell-like response. This paper reports numerical investigations towards a better characterization of initial imperfections in the response of CHS sections under compression. The results of non-linear shell F.E. sensitivity studies on geometrical imperfections are provided, comparing different shapes and amplitudes to literature results. Typically, the introduction of initial imperfections has relied on the first eigenmode; however, the local buckling response can vary significantly compared to experimental stub column tests in some cases, especially for slender sections. Finally, the paper concludes with practical modeling recommendations for more accurate representations of CHS section behavior under compression.
© SSRC 2024. All rights reserved.\n
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\n \n\n \n \n \n \n \n Influence of residual stresses on the cross-section stability of WF shapes.\n \n \n \n\n\n \n Gerard, L.; and Boissonnade, N.\n\n\n \n\n\n\n In San Antonio, TX, United states, 2024. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20242016090467 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Influence of residual stresses on the cross-section stability of WF shapes},\njournal = {Proceedings of the Annual Stability Conference Structural Stability Research Council, SSRC 2024},\nauthor = {Gerard, Lucile and Boissonnade, Nicolas},\nyear = {2024},\naddress = {San Antonio, TX, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Steel WF or I-shapes are usually fabricated by either hot-rolling or welding. Both manufacturing processes produce residual stresses that affect the stability behavior and resistance, namely at the member level (e.g., flexural or lateral torsional buckling). Yet, at the cross-sectional level, design provisions typically ignore the influence of residual stresses and propose identical sets of equations for hot-rolled and for welded sections. This paper numerically evidences that this should be improved and investigates how much more detrimental welded residual stresses patterns can be in comparison to hot-rolled ones, in various contexts. The results of detailed non-linear shell F.E. simulations on various geometries, slenderness, material grades and load cases are reported and analyzed, and recommendations for code improvements are proposed.<br/></div> © SSRC 2024. All rights reserved.},\nkey = {Residual stresses},\n%keywords = {Hot rolled steel;Hot rolling;Welding;},\n%note = {Design provisions;Fe simulation;Flexural-torsional buckling;Hot-rolled;Lateral-torsional buckling;Level design;Manufacturing process;Non linear;Stability behavior;Stress patterns;},\n} \n\n\n
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Steel WF or I-shapes are usually fabricated by either hot-rolling or welding. Both manufacturing processes produce residual stresses that affect the stability behavior and resistance, namely at the member level (e.g., flexural or lateral torsional buckling). Yet, at the cross-sectional level, design provisions typically ignore the influence of residual stresses and propose identical sets of equations for hot-rolled and for welded sections. This paper numerically evidences that this should be improved and investigates how much more detrimental welded residual stresses patterns can be in comparison to hot-rolled ones, in various contexts. The results of detailed non-linear shell F.E. simulations on various geometries, slenderness, material grades and load cases are reported and analyzed, and recommendations for code improvements are proposed.
© SSRC 2024. All rights reserved.\n
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\n \n\n \n \n \n \n \n Design Guidelines for Mitigating P-Delta Effects on the Seismic Response of Multi-Storey Steel Building Structures in Moderate and High Seismic Regions.\n \n \n \n\n\n \n Hariri, B.; Christopoulos, C.; and Tremblay, R.\n\n\n \n\n\n\n In San Antonio, TX, United states, 2024. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20242016090470 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design Guidelines for Mitigating P-Delta Effects on the Seismic Response of Multi-Storey Steel Building Structures in Moderate and High Seismic Regions},\njournal = {Proceedings of the Annual Stability Conference Structural Stability Research Council, SSRC 2024},\nauthor = {Hariri, Bashar and Christopoulos, Constantin and Tremblay, Robert},\nyear = {2024},\naddress = {San Antonio, TX, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">This article introduces framing systems and design guidelines to mitigate P-delta effects on the seismic response of steel braced frames used in multi-storey building structures. The proposed systems represent practical and cost-effective solutions to prevent concentration of inelastic deformations along the building height and achieve stable inelastic response, with the objective of waiving the height limit currently specified in ASCE/SEI 7 provisions for buckling restrained braced frames (BRBFs) in Seismic Design Category D, E, and F. The proposed framing systems consist of elastic bracing members that induce unbalanced vertical loads on the floor beams during storey drifting, resulting in secondary lateral storey shear stiffness. The floor beams are proportioned to maintain this secondary stiffness upon the inelastic response of the braced frame, such that P-delta effects are neutralized, and a self-centering response can develop to prevent progressive drifting and avoid collapse by dynamic instability. The adequacy of the proposed framing systems and design guidelines is verified by means of nonlinear response history analysis on 10-, 20-, 30-, and 40-storey BRBFs located in Seattle, WA. Two designs are compared: Design A in which P-Delta effects are accounted for in design as prescribed in ASCE/SEI 7, i.e. by amplifying seismic induced member forces using the stability coefficient θ; and Design B in which the proposed framing systems are introduced to counter P-Delta effects. The validation is accomplished by comparing the responses obtained using the two design approaches, with focus on peak and residual storey drifts. The study also includes a comparison of the responses from the two designs with the response obtained from analyses performed on the Design B frames when ignoring P-Delta effects. The results of the study show that amplifying seismic induced member forces as specified in ASCE 7 is not sufficient to mitigate soft-storey response and collapse by dynamic instability for the braced frames exceeding current height limits. In contrast, for all buildings examined, Design B in which secondary elastic storey shear stiffness is provided at every level could effectively ensure stable inelastic response, with uniform storey drifts and limited residual storey drifts over the full building height.<br/></div> © SSRC 2024. All rights reserved.},\nkey = {Seismic response},\n%keywords = {Architectural design;Cost effectiveness;Floors;Seismic design;Stability;Stiffness;Structural frames;},\n%note = {Braced frame;Buckling restrained braced frames;Building height;Dynamic instability;Floor beam;Framing system;Inelastic response;Member forces;P-delta effects;Shear stiffness;},\n} \n\n\n
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This article introduces framing systems and design guidelines to mitigate P-delta effects on the seismic response of steel braced frames used in multi-storey building structures. The proposed systems represent practical and cost-effective solutions to prevent concentration of inelastic deformations along the building height and achieve stable inelastic response, with the objective of waiving the height limit currently specified in ASCE/SEI 7 provisions for buckling restrained braced frames (BRBFs) in Seismic Design Category D, E, and F. The proposed framing systems consist of elastic bracing members that induce unbalanced vertical loads on the floor beams during storey drifting, resulting in secondary lateral storey shear stiffness. The floor beams are proportioned to maintain this secondary stiffness upon the inelastic response of the braced frame, such that P-delta effects are neutralized, and a self-centering response can develop to prevent progressive drifting and avoid collapse by dynamic instability. The adequacy of the proposed framing systems and design guidelines is verified by means of nonlinear response history analysis on 10-, 20-, 30-, and 40-storey BRBFs located in Seattle, WA. Two designs are compared: Design A in which P-Delta effects are accounted for in design as prescribed in ASCE/SEI 7, i.e. by amplifying seismic induced member forces using the stability coefficient θ; and Design B in which the proposed framing systems are introduced to counter P-Delta effects. The validation is accomplished by comparing the responses obtained using the two design approaches, with focus on peak and residual storey drifts. The study also includes a comparison of the responses from the two designs with the response obtained from analyses performed on the Design B frames when ignoring P-Delta effects. The results of the study show that amplifying seismic induced member forces as specified in ASCE 7 is not sufficient to mitigate soft-storey response and collapse by dynamic instability for the braced frames exceeding current height limits. In contrast, for all buildings examined, Design B in which secondary elastic storey shear stiffness is provided at every level could effectively ensure stable inelastic response, with uniform storey drifts and limited residual storey drifts over the full building height.
© SSRC 2024. All rights reserved.\n
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\n \n\n \n \n \n \n \n Analyzing the Buckling Behavior of Steel Angle Sections in Transmission Towers.\n \n \n \n\n\n \n Li, L.; Chehrazad, S.; Mohebbi, S.; Loignon, A.; Demers, M.; Lamarche, C.; and Langlois, S.\n\n\n \n\n\n\n In San Antonio, TX, United states, 2024. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20242016090479 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Analyzing the Buckling Behavior of Steel Angle Sections in Transmission Towers},\njournal = {Proceedings of the Annual Stability Conference Structural Stability Research Council, SSRC 2024},\nauthor = {Li, Liya and Chehrazad, Sanaz and Mohebbi, Saeed and Loignon, Alex and Demers, Marc and Lamarche, Charles-Philippe and Langlois, Sebastien},\nyear = {2024},\naddress = {San Antonio, TX, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">The buckling of steel angle members under compression loading in transmission towers is a critical failure mode that potentially leads to global structural collapse during extreme climatic events. This study aims to analyze and understand the buckling behavior of angle members in lattice towers through experimental testing of a tower section, followed by numerical analyses. A sub-assemblage of self-supporting lattice steel transmission towers was fabricated and subjected to critical design loads using a 6-degree-of-freedom loading setup. The angle members were tested under realistic conditions within a real lattice tower section, accounting for semi-rigid eccentric connections. This paper focuses on studying the pre- and post-peak buckling behavior of angle members under compression loading in a lattice tower context. Precise initial geometrical imperfections of the specimens were measured using digital image correlation (DIC) techniques. These imperfections were applied in the numerical models. The measured load and displacement data measured during the experimental phase were used to develop and validate ABAQUS shell element models for numerical simulation purposes. The ABAQUS simulations provided valuable insights into the buckling behavior of the steel angle sections. This comprehensive approach ensured an accurate representation of the structural response and enabled a deeper understanding of the buckling phenomenon in the context of lattice towers.<br/></div> © SSRC 2024. All rights reserved.},\nkey = {Buckling},\n%keywords = {Image correlation;Numerical models;Towers;Transmissions;},\n%note = {Buckling behaviour;Climatic events;Compression loading;Critical failures;Experimental testing;Lattice towers;Steel angle;Steel angle sections;Structural collapse;Transmission tower;},\n} \n\n\n
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The buckling of steel angle members under compression loading in transmission towers is a critical failure mode that potentially leads to global structural collapse during extreme climatic events. This study aims to analyze and understand the buckling behavior of angle members in lattice towers through experimental testing of a tower section, followed by numerical analyses. A sub-assemblage of self-supporting lattice steel transmission towers was fabricated and subjected to critical design loads using a 6-degree-of-freedom loading setup. The angle members were tested under realistic conditions within a real lattice tower section, accounting for semi-rigid eccentric connections. This paper focuses on studying the pre- and post-peak buckling behavior of angle members under compression loading in a lattice tower context. Precise initial geometrical imperfections of the specimens were measured using digital image correlation (DIC) techniques. These imperfections were applied in the numerical models. The measured load and displacement data measured during the experimental phase were used to develop and validate ABAQUS shell element models for numerical simulation purposes. The ABAQUS simulations provided valuable insights into the buckling behavior of the steel angle sections. This comprehensive approach ensured an accurate representation of the structural response and enabled a deeper understanding of the buckling phenomenon in the context of lattice towers.
© SSRC 2024. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n On the reliability of the dynamic terrain method to generate ABL winds for environmental applications.\n \n \n \n \n\n\n \n Potsis, T.; Ricci, A.; and Stathopoulos, T.\n\n\n \n\n\n\n Meccanica. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"OnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242016090597 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {On the reliability of the dynamic terrain method to generate ABL winds for environmental applications},\njournal = {Meccanica},\nauthor = {Potsis, Theodore and Ricci, Alessio and Stathopoulos, Ted},\nyear = {2024},\nissn = {00256455},\nabstract = {<div data-language="eng" data-ev-field="abstract">Computational fluid dynamics (CFD) has been developing rapidly during the last decades for usage in wind engineering. OpenFOAM plays a big role in this respect since it is a reliable open-source tool frequently used in state-of-the-art applications. In the present research study, the focus is given to the analysis of wind flow, mean, and fluctuating properties of two environmental cases using a novel inflow generator method for Large-eddy simulation (LES) in OpenFOAM. This refers to the dynamic terrain (DT) method for the generation and propagation of turbulence in the computational domain. LES simulations are carried out with the DT method on two wind-tunnel (WT) benchmark case studies proposed by the Architectural Institute of Japan (AIJ) and widely adopted in the scientific literature: (1) an isolated building (2) a cluster of buildings. Then, the LES results are compared to the WT results of AIJ. A good agreement is found in terms of the mean and turbulence properties of the wind velocity for the two case studies. The level of accuracy achieved from the LES-DT results establishes its reliability for wind flow modeling for various environmental applications.<br/></div> © Springer Nature B.V. 2024.},\nkey = {Large eddy simulation},\n%keywords = {Atmospheric boundary layer;Atmospheric movements;Atmospheric thermodynamics;Computational fluid dynamics;Landforms;Turbulence;Wind tunnels;},\n%note = {Dynamic terrain;Environmental applications;Large-eddy simulations;Open source tools;OpenFOAM;Pedestrian level wind;State of the art;Terrain methods;Wind engineering;Wind flow;},\nURL = {http://dx.doi.org/10.1007/s11012-024-01810-5},\n} \n\n\n
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Computational fluid dynamics (CFD) has been developing rapidly during the last decades for usage in wind engineering. OpenFOAM plays a big role in this respect since it is a reliable open-source tool frequently used in state-of-the-art applications. In the present research study, the focus is given to the analysis of wind flow, mean, and fluctuating properties of two environmental cases using a novel inflow generator method for Large-eddy simulation (LES) in OpenFOAM. This refers to the dynamic terrain (DT) method for the generation and propagation of turbulence in the computational domain. LES simulations are carried out with the DT method on two wind-tunnel (WT) benchmark case studies proposed by the Architectural Institute of Japan (AIJ) and widely adopted in the scientific literature: (1) an isolated building (2) a cluster of buildings. Then, the LES results are compared to the WT results of AIJ. A good agreement is found in terms of the mean and turbulence properties of the wind velocity for the two case studies. The level of accuracy achieved from the LES-DT results establishes its reliability for wind flow modeling for various environmental applications.
© Springer Nature B.V. 2024.\n
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\n \n\n \n \n \n \n \n \n Viscoelastic Dampers for Vibration Control of Building Structures: A State-of-Art Review.\n \n \n \n \n\n\n \n Shu, Z.; You, R.; and Xie, Y.\n\n\n \n\n\n\n Journal of Earthquake Engineering, 28(12): 3558 - 3585. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"ViscoelasticPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242016074925 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Viscoelastic Dampers for Vibration Control of Building Structures: A State-of-Art Review},\njournal = {Journal of Earthquake Engineering},\nauthor = {Shu, Zhan and You, Ruokai and Xie, Yazhou},\nvolume = {28},\nnumber = {12},\nyear = {2024},\npages = {3558 - 3585},\nissn = {13632469},\nabstract = {<div data-language="eng" data-ev-field="abstract">Due to its high effectiveness and low cost, viscoelastic damper (VED) is a commonly used type of passive energy dissipation device to reduce structural vibrations and responses against earthquakes and strong winds. Over the past decades, scholars have developed new types of VEDs to be installed at different structural locations. These VEDs offer better post-disaster recoverability and smarter behaviors for structures. Nonetheless, existing efforts of various VEDs and the technologies supporting VEDs were seldomly summarized. This article presents a critical state-of-art review of the existing research on VEDs, hybrid VED devices, and the design methods for structures installed with VEDs. First, the VEDs are classified based on the design locations in building structures, including VEDs used as coupling beams and damping walls, installed in braces and beam-column joints, and used to connect parallel structures. In addition to these classic VEDs, the study presents the high-performance VEDs and the corresponding techniques, such as the combined usage with other materials and/or devices. Furthermore, as an important contribution to the presented work, various design methods for structures enhanced by VEDs were systematically summarized. These methods considered different evaluation parameters aiming at different design targets. Finally, this article identifies and highlights research challenges in the existing studies. Possible improvements that could be made in the future were also provided.<br/></div> © 2024 Taylor & Francis Group, LLC.},\nkey = {Vibration control},\n%keywords = {Critical current density (superconductivity);Damping;Energy dissipation;Structural dynamics;Vibrations (mechanical);Viscoelasticity;},\n%note = {Building structure;Design method;Elastomeric dampers;Hybrid damper;Mechanical characteristics;Structural vibration control;Visco-elastic dampers;Visco-elastic material;Viscoelastic dampers;Viscoelastic material;},\nURL = {http://dx.doi.org/10.1080/13632469.2024.2345180},\n} \n\n\n
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Due to its high effectiveness and low cost, viscoelastic damper (VED) is a commonly used type of passive energy dissipation device to reduce structural vibrations and responses against earthquakes and strong winds. Over the past decades, scholars have developed new types of VEDs to be installed at different structural locations. These VEDs offer better post-disaster recoverability and smarter behaviors for structures. Nonetheless, existing efforts of various VEDs and the technologies supporting VEDs were seldomly summarized. This article presents a critical state-of-art review of the existing research on VEDs, hybrid VED devices, and the design methods for structures installed with VEDs. First, the VEDs are classified based on the design locations in building structures, including VEDs used as coupling beams and damping walls, installed in braces and beam-column joints, and used to connect parallel structures. In addition to these classic VEDs, the study presents the high-performance VEDs and the corresponding techniques, such as the combined usage with other materials and/or devices. Furthermore, as an important contribution to the presented work, various design methods for structures enhanced by VEDs were systematically summarized. These methods considered different evaluation parameters aiming at different design targets. Finally, this article identifies and highlights research challenges in the existing studies. Possible improvements that could be made in the future were also provided.
© 2024 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n Friction stir welded joints in aluminum highway bridge decks: a quality control framework.\n \n \n \n \n\n\n \n Trimech, M.; Annan, C.; Walbridge, S.; Maljaars, J.; and Nadeau, F.\n\n\n \n\n\n\n Structure and Infrastructure Engineering. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"FrictionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20242016081620 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Friction stir welded joints in aluminum highway bridge decks: a quality control framework},\njournal = {Structure and Infrastructure Engineering},\nauthor = {Trimech, Mahmoud and Annan, Charles-Darwin and Walbridge, Scott and Maljaars, Johan and Nadeau, Francois},\nyear = {2024},\nissn = {15732479},\nabstract = {<div data-language="eng" data-ev-field="abstract">Friction stir welding (FSW) has shown considerable promise for highway aluminum bridge deck fabrication but lacks specific quality control guidelines for fit-up defects. This study conducts a performance-based (PB) quality control assessment of butt-lap FSW joints for highway bridge decks. Five FSW conditions were simulated, including a standard control welding condition, fit-up defects (gaps and tool offset), and a welding tool’s rotational direction inversion from the standard condition. A rigorous prequalification process established acceptable tolerance levels for fit-up defects: a 3 mm positive offset, a 1.5 mm negative offset, and a 1.5 mm gap. Subsequently, specimens from real aluminium deck extrusions, incorporating the various welding conditions were subjected to fatigue testing. Results showed that the fatigue strength and failure mode were primarily influenced by the weld root microstructure. The FSW tool’s rotational direction significantly influenced fatigue strength due to its impact on the nucleation of the hooking defect in the weld root area, while the impact of fit-up defects on fatigue strength was comparatively lesser. Furthermore, finite element analysis examined the impact of the geometrical features of the root microstructure and the direction of the initial crack propagation on the stress intensity factor range. These findings have practical implications for setting tolerance levels for fit-up defects in aluminum butt-lap FSW joints and optimizing of the quality and fatigue strength of butt-lap FSW joints.<br/></div> © 2024 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Welds},\n%keywords = {Aluminum;Bridge decks;Defects;Extrusion;Fatigue testing;Friction;Friction stir welding;Microstructure;Quality assurance;Quality control;Research laboratories;},\n%note = {Aluminium extrusions;Fatigue strength;Fatigue test;Fit-up defect;Friction stir welding joints;Friction-stir-welding;Hooking defect;Weld root;Welding conditions;Welding tools;},\nURL = {http://dx.doi.org/10.1080/15732479.2024.2343856},\n} \n\n\n
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Friction stir welding (FSW) has shown considerable promise for highway aluminum bridge deck fabrication but lacks specific quality control guidelines for fit-up defects. This study conducts a performance-based (PB) quality control assessment of butt-lap FSW joints for highway bridge decks. Five FSW conditions were simulated, including a standard control welding condition, fit-up defects (gaps and tool offset), and a welding tool’s rotational direction inversion from the standard condition. A rigorous prequalification process established acceptable tolerance levels for fit-up defects: a 3 mm positive offset, a 1.5 mm negative offset, and a 1.5 mm gap. Subsequently, specimens from real aluminium deck extrusions, incorporating the various welding conditions were subjected to fatigue testing. Results showed that the fatigue strength and failure mode were primarily influenced by the weld root microstructure. The FSW tool’s rotational direction significantly influenced fatigue strength due to its impact on the nucleation of the hooking defect in the weld root area, while the impact of fit-up defects on fatigue strength was comparatively lesser. Furthermore, finite element analysis examined the impact of the geometrical features of the root microstructure and the direction of the initial crack propagation on the stress intensity factor range. These findings have practical implications for setting tolerance levels for fit-up defects in aluminum butt-lap FSW joints and optimizing of the quality and fatigue strength of butt-lap FSW joints.
© 2024 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n Experimental studies on the stability of aluminum sections and beam-columns.\n \n \n \n\n\n \n Verma, P.; Dahboul, S.; Li, L.; Dey, P.; and Boissonnade, N.\n\n\n \n\n\n\n In San Antonio, TX, United states, 2024. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20242016090190 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental studies on the stability of aluminum sections and beam-columns},\njournal = {Proceedings of the Annual Stability Conference Structural Stability Research Council, SSRC 2024},\nauthor = {Verma, Prachi and Dahboul, Sahar and Li, Liya and Dey, Pampa and Boissonnade, Nicolas},\nyear = {2024},\naddress = {San Antonio, TX, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Extruded aluminum members are known to be more prone to buckling than carbon steel members, owing to a lower Young’s modulus that is one-third that of steel. Further, their pronounced nonlinear material response and associated strain hardening effects have a non-negligible influence on their stability response. This paper therefore presents the results of an experimental test series on extruded 6061-T6 aluminum sections and beam-columns. Typical tensile tests and careful measurements of both local and global imperfections were achieved and are reported. Four sections under pure compression and two beam-columns under eccentric compression were tested to study the buckling behavior of extruded aluminum I and H profiles. Comparisons with code resistance predictions from the Canadian Standards CSA S157 reveal a significant potential for improvements, and corresponding indications for a more accurate stability design of aluminum members.<br/></div> © SSRC 2024. All rights reserved.},\nkey = {Tensile testing},\n%keywords = {Aluminum;Buckling;Strain hardening;},\n%note = {Beam-columns;Experimental test;Extruded aluminum;Four sections;Material response;Measurements of;Nonlinear materials;Steel members;Strain hardening effects;Two beams;},\n} \n\n\n
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Extruded aluminum members are known to be more prone to buckling than carbon steel members, owing to a lower Young’s modulus that is one-third that of steel. Further, their pronounced nonlinear material response and associated strain hardening effects have a non-negligible influence on their stability response. This paper therefore presents the results of an experimental test series on extruded 6061-T6 aluminum sections and beam-columns. Typical tensile tests and careful measurements of both local and global imperfections were achieved and are reported. Four sections under pure compression and two beam-columns under eccentric compression were tested to study the buckling behavior of extruded aluminum I and H profiles. Comparisons with code resistance predictions from the Canadian Standards CSA S157 reveal a significant potential for improvements, and corresponding indications for a more accurate stability design of aluminum members.
© SSRC 2024. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Performance of Nano-Bio Treated Columns in Slope Stability Using Centrifuge Modeling.\n \n \n \n \n\n\n \n Ghalandarzadeh, S.; Maghoul, P.; and Ghalandarzadeh, A.\n\n\n \n\n\n\n In pages 82 - 99, Kyrenia, Cyprus, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"PerformancePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20241916041150 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance of Nano-Bio Treated Columns in Slope Stability Using Centrifuge Modeling},\njournal = {Springer Series in Geomechanics and Geoengineering},\nauthor = {Ghalandarzadeh, Sara and Maghoul, Pooneh and Ghalandarzadeh, Abbas},\nyear = {2024},\npages = {82 - 99},\nissn = {18668755},\naddress = {Kyrenia, Cyprus},\nabstract = {<div data-language="eng" data-ev-field="abstract">Stability of ground slopes is of paramount importance in geotechnical engineering. Several mitigating methods have been proposed in the literature and applied in practice. In this study, the effect of nano-bio-treated columns, as green cement inclusions, on the stability of a clayey slope is investigated by conducting two centrifuge Ng model tests. Rigid inclusions have been made by using enhanced Microbially Induced Calcite Precipitation (MICP) and 1.5% nano- SiO <inf>2</inf>. Unimproved and improved models were loaded in a beam centrifuge device by increasing centrifugal acceleration. Failure surfaces gradually appeared in the unimproved model after the centrifugal acceleration reached 40 g. By increasing the acceleration to 58 g, at the end of the test, very large deformations were observed. In contrast, the stability of the improved model was maintained without any clear failure surface by the end of the test where the centrifugal acceleration was increased up to 77 g. It indicates the use of new nano-bio cement inclusions can be an effective approach for improving slope stability in clayey soils.<br/></div> © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Kaolinite},\n%keywords = {Bacteriology;Calcite;Centrifugation;Centrifuges;Geotechnical engineering;Silica;Slope stability;Soil cement;Soil mechanics;Soil testing;Soils;Stabilization;},\n%note = {Bacillus pasteurii;Biocalcification;Calcite precipitation;Centrifugal acceleration;Centrifuge tests;Failure surface;Microbially induced calcite precipitation;Nature-based soil stabilization;Slope;Soil stabilization;},\nURL = {http://dx.doi.org/10.1007/978-3-031-51951-2_8},\n} \n\n\n
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Stability of ground slopes is of paramount importance in geotechnical engineering. Several mitigating methods have been proposed in the literature and applied in practice. In this study, the effect of nano-bio-treated columns, as green cement inclusions, on the stability of a clayey slope is investigated by conducting two centrifuge Ng model tests. Rigid inclusions have been made by using enhanced Microbially Induced Calcite Precipitation (MICP) and 1.5% nano- SiO 2. Unimproved and improved models were loaded in a beam centrifuge device by increasing centrifugal acceleration. Failure surfaces gradually appeared in the unimproved model after the centrifugal acceleration reached 40 g. By increasing the acceleration to 58 g, at the end of the test, very large deformations were observed. In contrast, the stability of the improved model was maintained without any clear failure surface by the end of the test where the centrifugal acceleration was increased up to 77 g. It indicates the use of new nano-bio cement inclusions can be an effective approach for improving slope stability in clayey soils.
© 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n Pile Length Estimation Based on Guided Waves and Periodic Analysis.\n \n \n \n\n\n \n Cui, S.; Maghoul, P.; and Layssi, H.\n\n\n \n\n\n\n In volume 2024-February, pages 79 - 86, Vancouver, BC, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20241015687209 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Pile Length Estimation Based on Guided Waves and Periodic Analysis},\njournal = {Geotechnical Special Publication},\nauthor = {Cui, Shihao and Maghoul, Pooneh and Layssi, Hamed},\nvolume = {2024-February},\nnumber = {GSP 350},\nyear = {2024},\npages = {79 - 86},\nissn = {08950563},\naddress = {Vancouver, BC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Estimating pile length is critical when reusing unknown foundations. In this study, we provide a novel pile length estimate approach based on guided wave theory that uses only one sensor for data collection, addressing the inaccessibility of the pile top or lateral side for sensor installation as well as the need for accurate pile length calculation. The data acquisition transducer can be mounted on the pile's lateral or top surface. The normalized magnitude of the recorded frequency domain responses is defined. The dispersion analysis diagram of the wavenumber as a function of the normalized magnitude is then determined using the dispersion relation provided by the guided wave model. The pile length can be computed at low frequencies using the periodic analysis of the dispersion analysis diagram and the period determined from the diagram. Numerical analysis can be used to validate the suggested method's usefulness and correctness.<br/></div> © ASCE.},\nkey = {Guided electromagnetic wave propagation},\n%keywords = {Data acquisition;Dispersion (waves);Frequency domain analysis;Numerical methods;Piles;},\n%note = {Data collection;Dispersion analysis;Length calculation;Length estimation;Periodic analysis;Pile length;Sensor installation;Unknown foundations;Wave analysis;Wave theory;},\n} \n\n\n
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Estimating pile length is critical when reusing unknown foundations. In this study, we provide a novel pile length estimate approach based on guided wave theory that uses only one sensor for data collection, addressing the inaccessibility of the pile top or lateral side for sensor installation as well as the need for accurate pile length calculation. The data acquisition transducer can be mounted on the pile's lateral or top surface. The normalized magnitude of the recorded frequency domain responses is defined. The dispersion analysis diagram of the wavenumber as a function of the normalized magnitude is then determined using the dispersion relation provided by the guided wave model. The pile length can be computed at low frequencies using the periodic analysis of the dispersion analysis diagram and the period determined from the diagram. Numerical analysis can be used to validate the suggested method's usefulness and correctness.
© ASCE.\n
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\n \n\n \n \n \n \n \n \n Structural Fatigue Crack Localization Based on EMD and Sample Entropy.\n \n \n \n \n\n\n \n Cui, S.; Maghoul, P.; and Wu, N.\n\n\n \n\n\n\n In volume 359, pages 341 - 351, Whistler, BC, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"StructuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20240915632003 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Structural Fatigue Crack Localization Based on EMD and Sample Entropy},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Cui, Shihao and Maghoul, Pooneh and Wu, Nan},\nvolume = {359},\nyear = {2024},\npages = {341 - 351},\nissn = {23662557},\naddress = {Whistler, BC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">During structural vibration, fatigue cracks, especially at their initial stage, introduce a repetitive crack open-close breathing-like phenomenon. Breathing cracks cause irregularities, bi-linearity, or perturbations in the vibration response of a structural system. Entropy can be used to quantify the irregularity or bi-linearity in those responses, and the crack position can be determined since on the two sides of the breathing crack, there is an apparent variation of entropy values. Here, we present a new breathing crack localization method based on a spatially distributed entropy approach coupled with the empirical mode decomposition (EMD). EMD is used as a pre-processing tool to extract the characteristics caused by breathing phenomenon in the vibration signal, and the reconstructed signal is used for entropy calculation. The location of the crack can be estimated by entropy values at different positions of the test structure. To verify the accuracy of the proposed method in localizing the breathing crack, the results were compared with a series of laboratory experiments in a beam. It is concluded that the proposed approach can be effectively used for breathing crack localization in a structural system.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Empirical mode decomposition},\n%keywords = {Entropy;Fatigue crack propagation;Structural dynamics;},\n%note = {Breathing crack;Breathing phenomenon;Crack localization;Empirical Mode Decomposition;Emprical mode decomposition;Entropy value;Fatigue cracks;Mode decomposition;Structural fatigue;Structural systems;},\nURL = {http://dx.doi.org/10.1007/978-3-031-34027-7_22},\n} \n\n\n
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During structural vibration, fatigue cracks, especially at their initial stage, introduce a repetitive crack open-close breathing-like phenomenon. Breathing cracks cause irregularities, bi-linearity, or perturbations in the vibration response of a structural system. Entropy can be used to quantify the irregularity or bi-linearity in those responses, and the crack position can be determined since on the two sides of the breathing crack, there is an apparent variation of entropy values. Here, we present a new breathing crack localization method based on a spatially distributed entropy approach coupled with the empirical mode decomposition (EMD). EMD is used as a pre-processing tool to extract the characteristics caused by breathing phenomenon in the vibration signal, and the reconstructed signal is used for entropy calculation. The location of the crack can be estimated by entropy values at different positions of the test structure. To verify the accuracy of the proposed method in localizing the breathing crack, the results were compared with a series of laboratory experiments in a beam. It is concluded that the proposed approach can be effectively used for breathing crack localization in a structural system.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Effect of Low-Cycle Fatigue on the Seismic Vulnerability of Aluminium and Steel Domes.\n \n \n \n \n\n\n \n Efio-Akolly, A. C.; and Annan, C.\n\n\n \n\n\n\n In volume 359, pages 61 - 70, Whistler, BC, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"EffectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20240915631817 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of Low-Cycle Fatigue on the Seismic Vulnerability of Aluminium and Steel Domes},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Efio-Akolly, Akossiwa Constance and Annan, Charles-Darwin},\nvolume = {359},\nyear = {2024},\npages = {61 - 70},\nissn = {23662557},\naddress = {Whistler, BC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The low-cycle fatigue resistance of a material can influence the seismic vulnerability of a structure. Aluminium alloys are generally more susceptible to failure under low-cycle fatigue compared to steel. However, aluminium is an effective solution for domes exposed to aggressive environments such as chemical storage facilities, domes covering large spaces such as stadiums and domes with structural members connected efficiently (e.g. Mero) using extruded aluminium profiles. This is due to the durability, the high strength-to-weight ratio and the extrudability of aluminium alloys. The vulnerability of aluminium domes under earthquake ground motions may be influenced by its cyclic mechanical properties, including low-cycle fatigue. The rupture of a member under low-cycle fatigue can be captured by considering the earthquake-induced plastic strain cycle in the member. In the present study, the seismic vulnerability of aluminium and steel domes under the same gravity load are compared by developing fragility functions based on incremental dynamic analyses. The results showed that the low-cycle fatigue resistance of the material has a significant influence on the seismic performance of the domes. The aluminium dome and the steel dome were able to sustain seismic loads with spectral accelerations at the fundamental period up to 2 g and 2.5 g, respectively. It was observed that the aluminium dome showed a good seismic resistance for practical intensities representative of the design spectrum of Vancouver, BC, Canada.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {Domes},\n%keywords = {Acceleration;Ductile fracture;Earthquakes;High strength alloys;Low-cycle fatigue;Seismic design;},\n%note = {Aggressive environment;Chemical storage;Effective solution;Exposed to;Fatigue-resistance;Fragility analysis;Incremental dynamic analysis;Lattice dome;Low cycle fatigues;Seismic vulnerability;},\nURL = {http://dx.doi.org/10.1007/978-3-031-34027-7_5},\n} \n\n\n
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The low-cycle fatigue resistance of a material can influence the seismic vulnerability of a structure. Aluminium alloys are generally more susceptible to failure under low-cycle fatigue compared to steel. However, aluminium is an effective solution for domes exposed to aggressive environments such as chemical storage facilities, domes covering large spaces such as stadiums and domes with structural members connected efficiently (e.g. Mero) using extruded aluminium profiles. This is due to the durability, the high strength-to-weight ratio and the extrudability of aluminium alloys. The vulnerability of aluminium domes under earthquake ground motions may be influenced by its cyclic mechanical properties, including low-cycle fatigue. The rupture of a member under low-cycle fatigue can be captured by considering the earthquake-induced plastic strain cycle in the member. In the present study, the seismic vulnerability of aluminium and steel domes under the same gravity load are compared by developing fragility functions based on incremental dynamic analyses. The results showed that the low-cycle fatigue resistance of the material has a significant influence on the seismic performance of the domes. The aluminium dome and the steel dome were able to sustain seismic loads with spectral accelerations at the fundamental period up to 2 g and 2.5 g, respectively. It was observed that the aluminium dome showed a good seismic resistance for practical intensities representative of the design spectrum of Vancouver, BC, Canada.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Assessment of the Lateral Bearing Capacity of Traditional Walls Made of Timber Planks.\n \n \n \n \n\n\n \n Kraiem, M. H.; Khaled, A.; and Nollet, M.\n\n\n \n\n\n\n In volume 359, pages 15 - 25, Whistler, BC, Canada, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"AssessmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20240915632011 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment of the Lateral Bearing Capacity of Traditional Walls Made of Timber Planks},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Kraiem, Mohamed Hassen and Khaled, Amar and Nollet, Marie-Jose},\nvolume = {359},\nyear = {2024},\npages = {15 - 25},\nissn = {23662557},\naddress = {Whistler, BC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Evaluation of the structural capacity of existing buildings is a key component in the seismic risk assessment process to estimate damage and socioeconomic losses due to earthquakes. In Eastern Canada, a large number of traditional residential buildings were built between 1860 and 1915 using a mixed structural system of unreinforced masonry «URM» and wood. The lateral stability and resistance of several of those traditional buildings rely on the behaviour of the peripheral walls made of timber planks covered by a brick veneer. These traditional walls, called "carrés de madriers", are composed of timber planks, stacked horizontally between two wood posts delimiting panels between the wall openings. The lateral resistance is provided by the interaction and friction mechanisms between the horizontal timber planks and their interaction with the vertical wood posts. The main objective of this paper is to present: (1) a structural and mechanical characterization of a typical wall and (2) an evaluation of the lateral capacity using an analytical model and a finite element (FE) model. The analytical model is derived from the literature and used to estimate the maximum lateral displacement/resistance for this type of walls when subjected to in-plane lateral forces. In addition, major outcomes of a FE numerical investigation carried out on a single wood panel with the software ABAQUS© are discussed for different loading conditions (i.e. in-plane lateral and vertical compressive loads). Recommendations are given to improve the FE model especially the modelling of the connections between the horizontal and vertical elements.<br/></div> © Canadian Society for Civil Engineering 2024.},\nkey = {ABAQUS},\n%keywords = {Analytical models;Damage detection;Earthquakes;Finite element method;Risk assessment;Risk perception;Timber;Walls (structural partitions);},\n%note = {Carres de madriers;Finite element;Finite element modelling (FEM);Lateral bearing capacity;Lateral resistance;Mix structural;Seismic risk;Structural capacities;Timber plank;Wood post;},\nURL = {http://dx.doi.org/10.1007/978-3-031-34027-7_2},\n} \n\n\n
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Evaluation of the structural capacity of existing buildings is a key component in the seismic risk assessment process to estimate damage and socioeconomic losses due to earthquakes. In Eastern Canada, a large number of traditional residential buildings were built between 1860 and 1915 using a mixed structural system of unreinforced masonry «URM» and wood. The lateral stability and resistance of several of those traditional buildings rely on the behaviour of the peripheral walls made of timber planks covered by a brick veneer. These traditional walls, called \"carrés de madriers\", are composed of timber planks, stacked horizontally between two wood posts delimiting panels between the wall openings. The lateral resistance is provided by the interaction and friction mechanisms between the horizontal timber planks and their interaction with the vertical wood posts. The main objective of this paper is to present: (1) a structural and mechanical characterization of a typical wall and (2) an evaluation of the lateral capacity using an analytical model and a finite element (FE) model. The analytical model is derived from the literature and used to estimate the maximum lateral displacement/resistance for this type of walls when subjected to in-plane lateral forces. In addition, major outcomes of a FE numerical investigation carried out on a single wood panel with the software ABAQUS© are discussed for different loading conditions (i.e. in-plane lateral and vertical compressive loads). Recommendations are given to improve the FE model especially the modelling of the connections between the horizontal and vertical elements.
© Canadian Society for Civil Engineering 2024.\n
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\n \n\n \n \n \n \n \n \n Numerical Characterization of Overhead Conductor Local Loading Conditions at Wire Contact Points in the Vicinity of Suspension Clamps.\n \n \n \n \n\n\n \n Kared, L.; Lalonde, S.; Langlois, S.; and Guilbault, R.\n\n\n \n\n\n\n In volume 399, pages 327 - 338, Rome, Italy, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20240615507241 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical Characterization of Overhead Conductor Local Loading Conditions at Wire Contact Points in the Vicinity of Suspension Clamps},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Kared, Liticia and Lalonde, Sebastien and Langlois, Sebastien and Guilbault, Raynald},\nvolume = {399},\nyear = {2024},\npages = {327 - 338},\nissn = {23662557},\naddress = {Rome, Italy},\nabstract = {<div data-language="eng" data-ev-field="abstract">Wind-induced vibration is one of the main causes of overhead conductor fatigue, especially at the suspension points. These critical locations involve several inter-wire contact points prone to fretting damage due to conductor cyclic bending. Assessing the severity of these local loading conditions is therefore essential to better understand, predict, and prevent conductor failures. Available numerical models allow full 3D representations of conductor-clamp systems under cyclic bending, while considering all local contact interactions. Exploiting a recent finite element model based on an efficient beam-to-beam contact modelling strategy, this paper proposes a complete numerical characterization of conductor local loading conditions in the vicinity of suspension clamp. The study considers an ACSR Bersfort conductor installed in a short-radius metallic suspension clamp and subjected to cyclic bending loads associated to Aeolian vibrations. Using a factorial design of experiments (DOE), the characterization considers two key factors: the bending amplitude (Y<inf>b</inf>) and the conductor axial tension (T), each at three levels. From the DOE simulation results, the analyses highlight the parameter interactions with respect to the local loading conditions: wire mean (σ<inf>m</inf>) and alternating (σ<inf>a</inf>) bulk stresses, normal (P) and tangential (Q) inter-wire contact forces and the contact slip (δ). Results from the DOE thus provide a global and detailed description of the relationships between the external loads and local loading conditions being at the origin of conductor fretting fatigue damage. Under given Y<inf>b</inf> and T conditions, the proposed characterization therefore allows the identification of the critical contact points and their associated local solicitation for further in-depth and targeted investigations.<br/></div> © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Wire},\n%keywords = {Design of experiments;Fatigue damage;Finite element method;Overhead lines;Vibrations (mechanical);},\n%note = {Contact points;Factorial design;Finite element;Loading condition;Local loading;Local loading condition;Overhead conductors;Suspension clamp;Wind induced vibrations;Wire contact point;},\nURL = {http://dx.doi.org/10.1007/978-3-031-47152-0_28},\n} \n\n\n
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Wind-induced vibration is one of the main causes of overhead conductor fatigue, especially at the suspension points. These critical locations involve several inter-wire contact points prone to fretting damage due to conductor cyclic bending. Assessing the severity of these local loading conditions is therefore essential to better understand, predict, and prevent conductor failures. Available numerical models allow full 3D representations of conductor-clamp systems under cyclic bending, while considering all local contact interactions. Exploiting a recent finite element model based on an efficient beam-to-beam contact modelling strategy, this paper proposes a complete numerical characterization of conductor local loading conditions in the vicinity of suspension clamp. The study considers an ACSR Bersfort conductor installed in a short-radius metallic suspension clamp and subjected to cyclic bending loads associated to Aeolian vibrations. Using a factorial design of experiments (DOE), the characterization considers two key factors: the bending amplitude (Yb) and the conductor axial tension (T), each at three levels. From the DOE simulation results, the analyses highlight the parameter interactions with respect to the local loading conditions: wire mean (σm) and alternating (σa) bulk stresses, normal (P) and tangential (Q) inter-wire contact forces and the contact slip (δ). Results from the DOE thus provide a global and detailed description of the relationships between the external loads and local loading conditions being at the origin of conductor fretting fatigue damage. Under given Yb and T conditions, the proposed characterization therefore allows the identification of the critical contact points and their associated local solicitation for further in-depth and targeted investigations.
© 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n 3D Finite Element Modelling of Conductor-Clamp Assemblies Under Cyclic Bending: Sensitivity Analysis of Wire Contact Coefficient of Friction.\n \n \n \n \n\n\n \n Lalonde, S.; Kared, L.; Guilbault, R.; and Langlois, S.\n\n\n \n\n\n\n In volume 399, pages 315 - 326, Rome, Italy, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"3DPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20240615507240 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {3D Finite Element Modelling of Conductor-Clamp Assemblies Under Cyclic Bending: Sensitivity Analysis of Wire Contact Coefficient of Friction},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Lalonde, Sebastien and Kared, Liticia and Guilbault, Raynald and Langlois, Sebastien},\nvolume = {399},\nyear = {2024},\npages = {315 - 326},\nissn = {23662557},\naddress = {Rome, Italy},\nabstract = {<div data-language="eng" data-ev-field="abstract">Recent advances in numerical modelling now allow 3D analysis of complete conductor-clamp assemblies under multiaxial loading, while considering all wire interactions. In-depth studies simulating complex problems, such as wind-induced overhead conductor fatigue, are now possible. Providing detailed wire stresses and contact load distributions in the vicinity of suspension clamps, these models lead to refined conductor service life estimations. However, owing to its stranded configuration and multiple wire interactions, conductor kinematics is intricate and depends on material tribological properties. On the other hand, applications of conductor-clamp models commonly assume a uniform and constant adhesion coefficient of friction (μ<inf>a</inf>). In reality, μ<inf>a</inf> may vary over time with surface degradation. Therefore, numerical solutions that use a single μ<inf>a</inf> value could provide incomplete information and thus, lead to inaccurate conclusions. Using an efficient and proven multilayered strand modelling strategy based on 3D beam-to-beam contacts, this study investigates the influence of the coefficient of friction (μ<inf>a</inf>) on full conductor-clamp model solutions. Mapped distributions of wire stresses and local contact conditions are used to characterize the overall influence of the coefficient of friction on the model solution. Exploiting a factorial design approach, the analyses also highlight the cross-influence between the μ<inf>a</inf> level and conductor axial tension and cyclic bending amplitude.<br/></div> © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Wire},\n%keywords = {3D modeling;Cyclic loads;Finite element method;Friction;Numerical models;Overhead lines;Sensitivity analysis;Tribology;},\n%note = {3-D-analysis;3D analysis;3d conductor-clamp modeling;3D finite element model;Coefficient of frictions;Cyclic bending;Inter-wire contact;Model solution;Overhead conductors;Wind-induced cyclic bending;},\nURL = {http://dx.doi.org/10.1007/978-3-031-47152-0_27},\n} \n\n\n
\n
\n\n\n
\n
Recent advances in numerical modelling now allow 3D analysis of complete conductor-clamp assemblies under multiaxial loading, while considering all wire interactions. In-depth studies simulating complex problems, such as wind-induced overhead conductor fatigue, are now possible. Providing detailed wire stresses and contact load distributions in the vicinity of suspension clamps, these models lead to refined conductor service life estimations. However, owing to its stranded configuration and multiple wire interactions, conductor kinematics is intricate and depends on material tribological properties. On the other hand, applications of conductor-clamp models commonly assume a uniform and constant adhesion coefficient of friction (μa). In reality, μa may vary over time with surface degradation. Therefore, numerical solutions that use a single μa value could provide incomplete information and thus, lead to inaccurate conclusions. Using an efficient and proven multilayered strand modelling strategy based on 3D beam-to-beam contacts, this study investigates the influence of the coefficient of friction (μa) on full conductor-clamp model solutions. Mapped distributions of wire stresses and local contact conditions are used to characterize the overall influence of the coefficient of friction on the model solution. Exploiting a factorial design approach, the analyses also highlight the cross-influence between the μa level and conductor axial tension and cyclic bending amplitude.
© 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Statistical Study of Aeolian Vibration Characteristics of Overhead Conductor.\n \n \n \n \n\n\n \n Yang, S.; Chouinard, L.; Langlois, S.; Paradis, J.; and Van Dyke, P.\n\n\n \n\n\n\n In volume 399, pages 99 - 108, Rome, Italy, 2024. \n \n\n\n\n
\n\n\n\n \n \n \"StatisticalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20240615507251 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Statistical Study of Aeolian Vibration Characteristics of Overhead Conductor},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Yang, Shaoqi and Chouinard, Luc and Langlois, Sebastien and Paradis, Josee and Van Dyke, Pierre},\nvolume = {399},\nyear = {2024},\npages = {99 - 108},\nissn = {23662557},\naddress = {Rome, Italy},\nabstract = {<div data-language="eng" data-ev-field="abstract">Overhead transmission conductors are vulnerable to fretting fatigue due to aeolian vibrations. Accurate estimation of vibration severity is essential to determine the residual life of in-service lines and to schedule timely maintenance or replacement. For most transmission line networks, vibration monitoring systems are not available, and thus the vibration hazards must be derived from local wind conditions. The most widely accepted estimation procedure of the severity of aeolian vibration is by calculating the maximum oscillation amplitudes of the conductor based on the Energy Balance Principle (EBP), which establishes the balance between the energy transmitted to the conductor by the wind and the energy dissipated by self-damping of the conductor and dampers. However, the EBP is based on wind tunnel results where only one frequency is excited, while observations and experimental results show that multiple resonant modes are excited simultaneously. Furthermore, the distribution of vibration amplitudes and number of cycles for each amplitude are required to calculate cumulative damage due to fretting fatigue. In this paper, vibration data from an experimental undamped ACSR test line in Quebec, Canada, is analyzed in conjunction with concurrent winds over a 2-month period. The first step of the analysis is to identify observations corresponding to aeolian vibrations in both the time and frequency domains. For each record of aeolian vibrations, amplitudes are fitted to a Rayleigh distribution based on the narrow-band assumption. The number of cycles and Rayleigh parameter are then related to wind conditions through a modified Strouhal frequency and EBP methodology. A statistical model is proposed to understand the relationship between vibration profiles and wind input, taking into consideration the influence of wind speed and turbulence intensity, as well as the influence of conductor tension.<br/></div> © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Wind tunnels},\n%keywords = {Fatigue of materials;Overhead lines;Vibration analysis;Wind speed;},\n%note = {Aeolian vibration;Damages accumulation;Energy;Energy balance principle;Fretting fatigues;Overhead conductors;Residual life;Vibration amplitude;Vibration profiles;Wind conditions;},\nURL = {http://dx.doi.org/10.1007/978-3-031-47152-0_9},\n} \n\n\n
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Overhead transmission conductors are vulnerable to fretting fatigue due to aeolian vibrations. Accurate estimation of vibration severity is essential to determine the residual life of in-service lines and to schedule timely maintenance or replacement. For most transmission line networks, vibration monitoring systems are not available, and thus the vibration hazards must be derived from local wind conditions. The most widely accepted estimation procedure of the severity of aeolian vibration is by calculating the maximum oscillation amplitudes of the conductor based on the Energy Balance Principle (EBP), which establishes the balance between the energy transmitted to the conductor by the wind and the energy dissipated by self-damping of the conductor and dampers. However, the EBP is based on wind tunnel results where only one frequency is excited, while observations and experimental results show that multiple resonant modes are excited simultaneously. Furthermore, the distribution of vibration amplitudes and number of cycles for each amplitude are required to calculate cumulative damage due to fretting fatigue. In this paper, vibration data from an experimental undamped ACSR test line in Quebec, Canada, is analyzed in conjunction with concurrent winds over a 2-month period. The first step of the analysis is to identify observations corresponding to aeolian vibrations in both the time and frequency domains. For each record of aeolian vibrations, amplitudes are fitted to a Rayleigh distribution based on the narrow-band assumption. The number of cycles and Rayleigh parameter are then related to wind conditions through a modified Strouhal frequency and EBP methodology. A statistical model is proposed to understand the relationship between vibration profiles and wind input, taking into consideration the influence of wind speed and turbulence intensity, as well as the influence of conductor tension.
© 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Pilot-Scale Removal of Metals from Iron-Rich Contaminated Groundwater Using Phosphorylated Lignocellulosic Fibers.\n \n \n \n \n\n\n \n Gagnon-Poirier, S.; Zagury, G. J.; Robert, T.; and Courcelles, B.\n\n\n \n\n\n\n Water, Air, and Soil Pollution, 235(1). 2024.\n \n\n\n\n
\n\n\n\n \n \n \"Pilot-ScalePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240115305421 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Pilot-Scale Removal of Metals from Iron-Rich Contaminated Groundwater Using Phosphorylated Lignocellulosic Fibers},\njournal = {Water, Air, and Soil Pollution},\nauthor = {Gagnon-Poirier, Stephany and Zagury, Gerald J. and Robert, Thomas and Courcelles, Benoit},\nvolume = {235},\nnumber = {1},\nyear = {2024},\nissn = {00496979},\nabstract = {<div data-language="eng" data-ev-field="abstract">The performance of the phosphorylated lignocellulosic fiber (PLF) was assessed for metal removal in an acidic mine drainage (AMD) influent at pilot scale and at laboratory scale with synthetic water. Substrate showed strong potential for sorption with a cation exchange capacity (CEC) of 540 meq 100g<sup>−1</sup>, a point of zero charge (PZC) of 7.3, and a limited amount of organic carbon released. Average concentrations (mg L<sup>−1</sup>) of Ca, Mg, Fe, Mn, and Zn in the influent were 427, 289, 1,420, 18.3, and 19.2, respectively. Retention of 1635 mg g<sup>−1</sup> of Fe, 23.1 mg g<sup>−1</sup> of Mn, and 18.1 mg g<sup>−1</sup> of Zn was achieved by the PLFs at pilot scale. The pump and treat system was in function for a total of 852 h over a 9-week period and allowed the treatment of 4806 L of Fe-rich contaminated water from an abandoned mining site in Québec (Canada). This medium-term experiment allowed to assess some of the key uncertainties that limit biosorption applications at large scale, namely organic carbon release and longevity and degradation of biosorbents. The substrate was subject to degradation, but it was found that acidic water reaching the PLF was mainly responsible for its dissolution. Hence, the PLF is a good candidate for long-term treatment when the influent pH is higher than 6. Metal removal was about 10 times higher during the field experiments compared with laboratory-scale equilibrium experiment, suggesting that many sorption reactions took place in the field and not in the laboratory. Differences between the laboratory and pilot experiments are the scale (0.45 L vs 4806 L) and water characteristics (continuous feed of various metals in the field).<br/></div> © 2023, The Author(s), under exclusive licence to Springer Nature Switzerland AG.},\nkey = {Laboratories},\n%keywords = {Chemicals removal (water treatment);Drainage;Groundwater;Groundwater pollution;Iron;Metal ions;Mining;Organic carbon;Sorption;Uncertainty analysis;},\n%note = {Acid mine-drainage;Iron rich;Iron-rich acid mine drainage;Lignocellulosic material;Metal removal;Paper pulp;Passive treatment;Phosphorylated paper pulp;Pilot scale;Pilot-scale treatment;},\nURL = {http://dx.doi.org/10.1007/s11270-023-06801-y},\n} \n\n\n
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The performance of the phosphorylated lignocellulosic fiber (PLF) was assessed for metal removal in an acidic mine drainage (AMD) influent at pilot scale and at laboratory scale with synthetic water. Substrate showed strong potential for sorption with a cation exchange capacity (CEC) of 540 meq 100g−1, a point of zero charge (PZC) of 7.3, and a limited amount of organic carbon released. Average concentrations (mg L−1) of Ca, Mg, Fe, Mn, and Zn in the influent were 427, 289, 1,420, 18.3, and 19.2, respectively. Retention of 1635 mg g−1 of Fe, 23.1 mg g−1 of Mn, and 18.1 mg g−1 of Zn was achieved by the PLFs at pilot scale. The pump and treat system was in function for a total of 852 h over a 9-week period and allowed the treatment of 4806 L of Fe-rich contaminated water from an abandoned mining site in Québec (Canada). This medium-term experiment allowed to assess some of the key uncertainties that limit biosorption applications at large scale, namely organic carbon release and longevity and degradation of biosorbents. The substrate was subject to degradation, but it was found that acidic water reaching the PLF was mainly responsible for its dissolution. Hence, the PLF is a good candidate for long-term treatment when the influent pH is higher than 6. Metal removal was about 10 times higher during the field experiments compared with laboratory-scale equilibrium experiment, suggesting that many sorption reactions took place in the field and not in the laboratory. Differences between the laboratory and pilot experiments are the scale (0.45 L vs 4806 L) and water characteristics (continuous feed of various metals in the field).
© 2023, The Author(s), under exclusive licence to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Performance of 2D-spectral finite element method in dynamic analysis of concrete gravity dams.\n \n \n \n \n\n\n \n Sarkar, A.; Ghodke, S.; and Bagchi, A.\n\n\n \n\n\n\n Structures, 59. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"PerformancePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20240115306463 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance of 2D-spectral finite element method in dynamic analysis of concrete gravity dams},\njournal = {Structures},\nauthor = {Sarkar, Avirup and Ghodke, Sharad and Bagchi, Ashutosh},\nvolume = {59},\nyear = {2024},\nissn = {23520124},\nabstract = {<div data-language="eng" data-ev-field="abstract">This article presents a two-dimensional spectral finite element formulation for dynamic analysis of concrete gravity dams. Finite element method (FEM) is the one of the most extensively used analysis tools for solving problems of dynamic analysis of structures. However, it needs extensive computational resources and time for large structures, leading to the development of alternate computationally efficient modeling techniques over the past few decades. Some of these techniques are broadly termed as "Spectral Finite Element Methods" (SFEMs). Frequency domain-based SFEM (FDSFEM) and time domain-based SFEM (TDSFEM) are the most commonly used SFEMs found in the literature. This article provides a brief review of these methods identifying their key advantages and disadvantages; and explores the feasibility of applying such methods in the dynamic analysis of concrete gravity dams. Here, the TDSFEM has been used to perform the dynamic time history analysis of a concrete gravity dam due to its relative advantages over FDSFEM, which is challenging for irregular geometry and finite domain. Sensitivity analysis and convergence studies have been performed using 4-noded and 9-noded elements. The foundation of the dam has been modeled using two-dimensional infinite elements in both FEM and TDSFEM analysis, which is a novel application in the case of TDSFEM. This article quantifies the computational efficiency of TDSFEM over the conventional FEM by comparing the computation time in both methods and thus emphasizes the applicability of TDSFEM in dynamic analysis, especially in case of complex geometries and large two-dimensional structures (like concrete gravity dam). The results demonstrate the computational efficiency of TDSFEM over FEM when higher order elements are considered. Modal analysis and time history analysis results point that the use of higher order elements of TDSFEM can be a viable alternative to the use of the conventional FEM leading to significant saving in computational time with reasonable accuracy for dynamic analysis of large structures like concrete gravity dams.<br/></div> © 2023 Institution of Structural Engineers},\nkey = {Finite element method},\n%keywords = {Computational efficiency;Concrete dams;Concretes;Frequency domain analysis;Gravity dams;Modal analysis;Sensitivity analysis;Time domain analysis;},\n%note = {Computational time;Concrete gravity dams;Dynamics analysis;Infinite element;Large structures;Spectral finite element method;Time domain;Time domain spectral finite element method";Two-dimensional;},\nURL = {http://dx.doi.org/10.1016/j.istruc.2023.105770},\n} \n\n\n
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This article presents a two-dimensional spectral finite element formulation for dynamic analysis of concrete gravity dams. Finite element method (FEM) is the one of the most extensively used analysis tools for solving problems of dynamic analysis of structures. However, it needs extensive computational resources and time for large structures, leading to the development of alternate computationally efficient modeling techniques over the past few decades. Some of these techniques are broadly termed as \"Spectral Finite Element Methods\" (SFEMs). Frequency domain-based SFEM (FDSFEM) and time domain-based SFEM (TDSFEM) are the most commonly used SFEMs found in the literature. This article provides a brief review of these methods identifying their key advantages and disadvantages; and explores the feasibility of applying such methods in the dynamic analysis of concrete gravity dams. Here, the TDSFEM has been used to perform the dynamic time history analysis of a concrete gravity dam due to its relative advantages over FDSFEM, which is challenging for irregular geometry and finite domain. Sensitivity analysis and convergence studies have been performed using 4-noded and 9-noded elements. The foundation of the dam has been modeled using two-dimensional infinite elements in both FEM and TDSFEM analysis, which is a novel application in the case of TDSFEM. This article quantifies the computational efficiency of TDSFEM over the conventional FEM by comparing the computation time in both methods and thus emphasizes the applicability of TDSFEM in dynamic analysis, especially in case of complex geometries and large two-dimensional structures (like concrete gravity dam). The results demonstrate the computational efficiency of TDSFEM over FEM when higher order elements are considered. Modal analysis and time history analysis results point that the use of higher order elements of TDSFEM can be a viable alternative to the use of the conventional FEM leading to significant saving in computational time with reasonable accuracy for dynamic analysis of large structures like concrete gravity dams.
© 2023 Institution of Structural Engineers\n
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\n \n\n \n \n \n \n \n \n Simplified Micro-Modeling of a Masonry Cross-Vault for Seismic Assessment Using the Distinct Element Method.\n \n \n \n \n\n\n \n Oktiovan, Y.; Davis, L.; Wilson, R.; DellEndice, A.; Mehrotra, A.; Pulatsu, B.; and Malomo, D.\n\n\n \n\n\n\n International Journal of Architectural Heritage, 18(12): 1915 - 1948. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"SimplifiedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20234615066848 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Simplified Micro-Modeling of a Masonry Cross-Vault for Seismic Assessment Using the Distinct Element Method},\njournal = {International Journal of Architectural Heritage},\nauthor = {Oktiovan, Y.P. and Davis, L. and Wilson, R. and DellEndice, A. and Mehrotra, A. and Pulatsu, B. and Malomo, D.},\nvolume = {18},\nnumber = {12},\nyear = {2024},\npages = {1915 - 1948},\nissn = {15583058},\nabstract = {<div data-language="eng" data-ev-field="abstract">The assessment of the seismic performance of unreinforced masonry cross-vaults is still a challenge in numerical analysis, due to complex curved geometries and bond patterns, and uncertainties related to the selection of adequate modeling strategies, including but not limited to that of material properties, damping scheme, and unit/joint idealization. This paper presents the results of a collaborative effort to validate, against the shake table test of both unstrengthened and strengthened masonry cross-vault specimens as part of the SERA Project Blind Prediction and Post-diction Competition, various discontinuum-based numerical approaches. First, the geometry of the cross-vault is created using a Python-based computational framework to accurately represent the brick arrangement and the shape of the vault. Then, the geometry is converted into an assemblage of deformable blocks and analyzed using the Distinct Element Method (DEM). An elasto-softening contact model based on fracture energy is implemented in the masonry joints to simulate crushing, tensile, and shear failures. The performance of the proposed strategy, conceived for the unstrengthened configuration of the tested vault specimen and then adapted to include the presence of cementitious repairs, shows satisfactory agreement with both qualitative and quantitative experimental responses, also revealing critical insights and lessons learned through the blind/post-prediction exercise.<br/></div> © 2023 The Author(s). Published with license by Taylor & Francis Group, LLC.},\nkey = {Seismology},\n%keywords = {Computational geometry;Distributed computer systems;End effectors;Masonry materials;Python;Uncertainty analysis;},\n%note = {Blind predictions;Contact modeling;Cross-vault;Distinct element methods;Micromodels;Post-diction;Seismic assessment;Seismic Performance;Softening contact model;Unreinforced masonries (URMs);},\nURL = {http://dx.doi.org/10.1080/15583058.2023.2277328},\n} \n\n\n
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The assessment of the seismic performance of unreinforced masonry cross-vaults is still a challenge in numerical analysis, due to complex curved geometries and bond patterns, and uncertainties related to the selection of adequate modeling strategies, including but not limited to that of material properties, damping scheme, and unit/joint idealization. This paper presents the results of a collaborative effort to validate, against the shake table test of both unstrengthened and strengthened masonry cross-vault specimens as part of the SERA Project Blind Prediction and Post-diction Competition, various discontinuum-based numerical approaches. First, the geometry of the cross-vault is created using a Python-based computational framework to accurately represent the brick arrangement and the shape of the vault. Then, the geometry is converted into an assemblage of deformable blocks and analyzed using the Distinct Element Method (DEM). An elasto-softening contact model based on fracture energy is implemented in the masonry joints to simulate crushing, tensile, and shear failures. The performance of the proposed strategy, conceived for the unstrengthened configuration of the tested vault specimen and then adapted to include the presence of cementitious repairs, shows satisfactory agreement with both qualitative and quantitative experimental responses, also revealing critical insights and lessons learned through the blind/post-prediction exercise.
© 2023 The Author(s). Published with license by Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n Fatigue crack localisation based on empirical mode decomposition and pre-selected entropy.\n \n \n \n \n\n\n \n Cui, S.; Wu, N.; and Maghoul, P.\n\n\n \n\n\n\n Nondestructive Testing and Evaluation, 39(6): 1467 - 1494. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"FatiguePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234515024805 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Fatigue crack localisation based on empirical mode decomposition and pre-selected entropy},\njournal = {Nondestructive Testing and Evaluation},\nauthor = {Cui, Shihao and Wu, Nan and Maghoul, Pooneh},\nvolume = {39},\nnumber = {6},\nyear = {2024},\npages = {1467 - 1494},\nissn = {10589759},\nabstract = {<div data-language="eng" data-ev-field="abstract">Fatigue cracks, especially at their initial stage, can lead to a repetitive crack open-close breathing-like phenomenon in the vibration response of structural elements. As such, regularities, bi-linearity, or perturbations in the vibration response can arise. Entropy can be used to quantify the irregularity or bi-linearity in these responses since there is an apparent variation of entropy values on the two sides of a breathing crack. Here, we present a new breathing crack localisation method based on a spatially distributed entropy approach coupled with the empirical mode decomposition technique. To enhance the robustness, a pre-selection mechanism is proposed to select the most suitable entropy method. The proposed method is then employed to localise the breathing crack in a beam in a laboratory setup. It is concluded that the proposed approach can be effectively used for breathing crack localisation in a structural element.<br/></div> © 2023 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Empirical mode decomposition},\n%keywords = {Fatigue crack propagation;Structural health monitoring;},\n%note = {Breathing crack;Breathing phenomenon;Crack localization;Empirical Mode Decomposition;Entropy approach;Entropy value;Fatigue cracks;Localization method;Structural elements;Vibration response;},\nURL = {http://dx.doi.org/10.1080/10589759.2023.2274000},\n} \n\n\n
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Fatigue cracks, especially at their initial stage, can lead to a repetitive crack open-close breathing-like phenomenon in the vibration response of structural elements. As such, regularities, bi-linearity, or perturbations in the vibration response can arise. Entropy can be used to quantify the irregularity or bi-linearity in these responses since there is an apparent variation of entropy values on the two sides of a breathing crack. Here, we present a new breathing crack localisation method based on a spatially distributed entropy approach coupled with the empirical mode decomposition technique. To enhance the robustness, a pre-selection mechanism is proposed to select the most suitable entropy method. The proposed method is then employed to localise the breathing crack in a beam in a laboratory setup. It is concluded that the proposed approach can be effectively used for breathing crack localisation in a structural element.
© 2023 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n Automated system for high-accuracy quantity takeoff using BIM.\n \n \n \n \n\n\n \n Valinejadshoubi, M.; Moselhi, O.; Iordanova, I.; Valdivieso, F.; and Bagchi, A.\n\n\n \n\n\n\n Automation in Construction, 157. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"AutomatedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234414997253 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Automated system for high-accuracy quantity takeoff using BIM},\njournal = {Automation in Construction},\nauthor = {Valinejadshoubi, Mojtaba and Moselhi, Osama and Iordanova, Ivanka and Valdivieso, Fernando and Bagchi, Ashutosh},\nvolume = {157},\nyear = {2024},\nissn = {09265805},\nabstract = {<div data-language="eng" data-ev-field="abstract">Reliable construction project cost estimation relies on accurate quantity takeoffs (QTOs), traditionally done with error-prone 2-D drawings, but the emergence of Building Information Modeling (BIM) has improved QTO speed, accuracy, and reliability. However, the quality of BIM models can influence quantity accuracy, an aspect often overlooked in research on automating QTO with BIM. This paper develops an integrated framework to automatically extract and visualize construction quantities from BIM models. The system includes a Quantity Precision Check (QPC) module for automating more accurate QTO outputs. These outputs are then automatically transferred to an external database and visualized through a user-friendly dashboard on the Microsoft Power BI platform. This dashboard allows for comparisons between 2-D and BIM quantities and helps track changes in quantities over time due to design changes. The system was successfully validated in an infrastructure construction project in Canada, where it identified a 39% inconsistency in wall elements' material quantities and reduced steel quantity by 10% due to design changes. Overall, the system offers a speedy, reliable, and efficient tool for construction estimators, site managers, and cost control teams to provide accurate quantities to the procurement team and make swift decisions in response to design change impacts on construction costs.<br/></div> © 2023 Elsevier B.V.},\nkey = {Cost effectiveness},\n%keywords = {Architectural design;Automation;Cost estimating;Human resource management;},\n%note = {Automated systems;Building Information Modelling;Construction project costs;Cost controls;Design change;High-accuracy;Procurement;Project cost estimation;Quantity take offs;Quantity takeoff;},\nURL = {http://dx.doi.org/10.1016/j.autcon.2023.105155},\n} \n\n\n
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Reliable construction project cost estimation relies on accurate quantity takeoffs (QTOs), traditionally done with error-prone 2-D drawings, but the emergence of Building Information Modeling (BIM) has improved QTO speed, accuracy, and reliability. However, the quality of BIM models can influence quantity accuracy, an aspect often overlooked in research on automating QTO with BIM. This paper develops an integrated framework to automatically extract and visualize construction quantities from BIM models. The system includes a Quantity Precision Check (QPC) module for automating more accurate QTO outputs. These outputs are then automatically transferred to an external database and visualized through a user-friendly dashboard on the Microsoft Power BI platform. This dashboard allows for comparisons between 2-D and BIM quantities and helps track changes in quantities over time due to design changes. The system was successfully validated in an infrastructure construction project in Canada, where it identified a 39% inconsistency in wall elements' material quantities and reduced steel quantity by 10% due to design changes. Overall, the system offers a speedy, reliable, and efficient tool for construction estimators, site managers, and cost control teams to provide accurate quantities to the procurement team and make swift decisions in response to design change impacts on construction costs.
© 2023 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Assessing the condition state of a concrete bridge combining visual inspection and nonlinear deterioration model.\n \n \n \n \n\n\n \n Bah, A. S.; Sanchez, T.; Zhang, Y.; Sasai, K.; Conciatori, D.; Chouinard, L.; Power, G. J.; and Zufferey, N.\n\n\n \n\n\n\n Structure and Infrastructure Engineering, 20(2): 149 - 164. 2024.\n \n\n\n\n
\n\n\n\n \n \n \"AssessingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222312205800 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessing the condition state of a concrete bridge combining visual inspection and nonlinear deterioration model},\njournal = {Structure and Infrastructure Engineering},\nauthor = {Bah, Abdoul S. and Sanchez, Thomas and Zhang, Yan and Sasai, Kotaro and Conciatori, David and Chouinard, Luc and Power, Gabriel J. and Zufferey, Nicolas},\nvolume = {20},\nnumber = {2},\nyear = {2024},\npages = {149 - 164},\nissn = {15732479},\nabstract = {<div data-language="eng" data-ev-field="abstract">The degradation of a concrete structure in northern climate is mainly due to the corrosion of steel reinforcements and cumulative damages from mechanical loading. Infrastructure managers heavily rely on ratings obtained from visual field surveys and the interpretation of inspection reports to predict the future structure states and to plan appropriate maintenance and replacement activities. In this paper, an effective structure management framework is proposed, combining information from on-site visual inspections and predictions from a nonlinear chloride transport model, to improve diagnostics for preventive maintenance. Meaningful predictions were obtained by using climatic data from neighboring weather stations and characterising the concrete transport properties with non-destructive tests. The chloride profiles from the model can be validated with core-drilled samples, if available. Predictions from the model were used to estimate the probability of the corrosion initiation and the condition states of the structural elements to complement the visual inspection observations. Finally, the ratings of each element were combined to obtain a global rating of the structure by considering the relative criticality of each element for the safety and the performance of the structure. The methodology was applied to a typical bridge in Montreal and demonstrated good agreement between the model predictions.<br/></div> © 2022 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Deterioration},\n%keywords = {Bridge decks;Chlorine compounds;Concrete bridges;Condition based maintenance;Forecasting;Information management;Inspection;Nondestructive examination;Preventive maintenance;Steel corrosion;},\n%note = {Assessment;Condition state;Corrosion of steel;Corrosion rebar;Cumulative damage;Deterioration modeling;Infrastructure managers;Mechanical loading;Steel reinforcements;Visual inspection;},\nURL = {http://dx.doi.org/10.1080/15732479.2022.2081987},\n} \n\n\n
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The degradation of a concrete structure in northern climate is mainly due to the corrosion of steel reinforcements and cumulative damages from mechanical loading. Infrastructure managers heavily rely on ratings obtained from visual field surveys and the interpretation of inspection reports to predict the future structure states and to plan appropriate maintenance and replacement activities. In this paper, an effective structure management framework is proposed, combining information from on-site visual inspections and predictions from a nonlinear chloride transport model, to improve diagnostics for preventive maintenance. Meaningful predictions were obtained by using climatic data from neighboring weather stations and characterising the concrete transport properties with non-destructive tests. The chloride profiles from the model can be validated with core-drilled samples, if available. Predictions from the model were used to estimate the probability of the corrosion initiation and the condition states of the structural elements to complement the visual inspection observations. Finally, the ratings of each element were combined to obtain a global rating of the structure by considering the relative criticality of each element for the safety and the performance of the structure. The methodology was applied to a typical bridge in Montreal and demonstrated good agreement between the model predictions.
© 2022 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n Investigation of different parameters affecting the crack width and kb coefficient of GFRP-RC beams.\n \n \n \n \n\n\n \n Gouda, O.; Asadian, A.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 297. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"InvestigationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234114855934 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigation of different parameters affecting the crack width and kb coefficient of GFRP-RC beams},\njournal = {Engineering Structures},\nauthor = {Gouda, Omar and Asadian, Alireza and Galal, Khaled},\nvolume = {297},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Crack width control is one of the criteria affecting the design of glass fiber-reinforced polymer (GFRP)-reinforced concrete (RC) structural components. The provisions available in the CSA S806-12 standard and ACI 440.1R-15 guideline for controlling the crack width of GFRP RC elements account for the bond between the GFRP reinforcement and surrounding concrete through the bond-dependent coefficient (k<inf>b</inf>). In those design standards and guidelines, each GFRP bar surface profile is assigned a k<inf>b</inf> value obtained from four-point bending beam tests. This study aims to experimentally investigate the parameters that affect the crack width and k<inf>b</inf> coefficient of GFRP reinforcing bars, enrich the literature with more k<inf>b</inf> results for ribbed and sand-coated GFRP bars, determine whether k<inf>b</inf> is a fixed value that is solely dependent on the bar surface profile (as assumed by the above standard and guideline), recalibrate the k<inf>b</inf> coefficient considering the experimental results of this study and available experimental data in the literature, and provide the FRP engineering community with an equation that is capable of anticipating k<inf>b</inf> values based on different configurational and material parameters. To achieve the objectives of this study, 16 large-scale RC beams were tested under a four-point bending test setup. The studied parameters included the clear concrete cover, bar spacing, bar diameter, concrete compressive strength, bar surface profile, and confinement provided by transverse reinforcement. The experimental results of this study were combined with the available database to recalibrate the k<inf>b</inf> values and propose a k<inf>b</inf> equation. The results showed that the k<inf>b</inf> coefficient varies when changing the reinforcement configuration of the beam.<br/></div> © 2023},\nkey = {Reinforced concrete},\n%keywords = {Bending tests;Compressive strength;Concrete beams and girders;Fiber reinforced plastics;Glass fibers;},\n%note = {B value;B-coefficients;Bond-dependent coefficient (kb);Crack-width;Glass fiber-reinforced polymer;Glassfiber reinforced polymers (GFRP);Reinforced concrete beams;Serviceability;Standards and guidelines;Surface profiles;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.116181},\n} \n\n\n
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Crack width control is one of the criteria affecting the design of glass fiber-reinforced polymer (GFRP)-reinforced concrete (RC) structural components. The provisions available in the CSA S806-12 standard and ACI 440.1R-15 guideline for controlling the crack width of GFRP RC elements account for the bond between the GFRP reinforcement and surrounding concrete through the bond-dependent coefficient (kb). In those design standards and guidelines, each GFRP bar surface profile is assigned a kb value obtained from four-point bending beam tests. This study aims to experimentally investigate the parameters that affect the crack width and kb coefficient of GFRP reinforcing bars, enrich the literature with more kb results for ribbed and sand-coated GFRP bars, determine whether kb is a fixed value that is solely dependent on the bar surface profile (as assumed by the above standard and guideline), recalibrate the kb coefficient considering the experimental results of this study and available experimental data in the literature, and provide the FRP engineering community with an equation that is capable of anticipating kb values based on different configurational and material parameters. To achieve the objectives of this study, 16 large-scale RC beams were tested under a four-point bending test setup. The studied parameters included the clear concrete cover, bar spacing, bar diameter, concrete compressive strength, bar surface profile, and confinement provided by transverse reinforcement. The experimental results of this study were combined with the available database to recalibrate the kb values and propose a kb equation. The results showed that the kb coefficient varies when changing the reinforcement configuration of the beam.
© 2023\n
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\n \n\n \n \n \n \n \n \n Scenario-based earthquake damage assessment of highway bridge networks.\n \n \n \n \n\n\n \n Abo-El-Ezz, A.; Farzam, A.; Fezai, H.; and Nollet, M.\n\n\n \n\n\n\n Advances in Bridge Engineering, 4(1). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"Scenario-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20240615491735 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Scenario-based earthquake damage assessment of highway bridge networks},\njournal = {Advances in Bridge Engineering},\nauthor = {Abo-El-Ezz, Ahmad and Farzam, Azarm and Fezai, Hamza and Nollet, Marie-Jose},\nvolume = {4},\nnumber = {1},\nyear = {2023},\nissn = {26625407},\nabstract = {<div data-language="eng" data-ev-field="abstract">In earthquake-prone regions, the evaluation of seismic impacts on bridges is crucial to mitigation, emergency, and recovery planning for highway networks. The degree of bridge damage determines the cost and time required for repairs and the level of post-earthquake functionality including disruption of transportation network, increased costs due to reduction of traffic flow and restricted access to emergency routes. The article presents the methodological development and implementation of an interactive web application for rapid geospatial assessment and visualisation of earthquake damage scenarios of municipal highway bridge networks based on open access datasets. The proposed framework consists of the following successive models: hazard, inventory, damage, and impact. The seismic hazard model generates spatial distribution of the shaking intensity for earthquake scenarios in terms of ground motion intensity measure using ground motion prediction equations based on seismic hazard model for Eastern Canada. The shaking intensities are then modified with local site amplification factors based on the Canadian highway bridge design code values. The inventory model provides a database of existing bridges based on open-access data which are then classified according to their seismic vulnerability. The damage model assesses seismic performance of classes of bridges by applying respective fragility functions represented as probabilistic relationships between the intensity measure and the degree of expected damage. The impact model evaluates the post-earthquake traffic-carrying capacity of the highway network based on the predicted damage including repair cost as a percentage of replacement cost of bridges and inspection priority. The web-application is demonstrated with a bridge network in Quebec City including 117 bridges subjected to 180 earthquake scenarios. The proposed methodology is particularly useful to facilitate direct communication of potential impacts to emergency managers and city transport officials.<br/></div> © 2023, The Author(s).},\nkey = {Risk assessment},\n%keywords = {Damage detection;Equations of motion;Hazards;Highway bridges;Highway planning;Motion estimation;Risk perception;Seismic design;Seismic response;Transportation routes;},\n%note = {Bridge networks;Damage assessments;Earthquake damages;Earthquake scenario;Fragility function;Geo-spatial;Geospatial risk mapping;Highway networks;Network-based;Risk mappings;},\nURL = {http://dx.doi.org/10.1186/s43251-023-00083-4},\n} \n\n\n
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In earthquake-prone regions, the evaluation of seismic impacts on bridges is crucial to mitigation, emergency, and recovery planning for highway networks. The degree of bridge damage determines the cost and time required for repairs and the level of post-earthquake functionality including disruption of transportation network, increased costs due to reduction of traffic flow and restricted access to emergency routes. The article presents the methodological development and implementation of an interactive web application for rapid geospatial assessment and visualisation of earthquake damage scenarios of municipal highway bridge networks based on open access datasets. The proposed framework consists of the following successive models: hazard, inventory, damage, and impact. The seismic hazard model generates spatial distribution of the shaking intensity for earthquake scenarios in terms of ground motion intensity measure using ground motion prediction equations based on seismic hazard model for Eastern Canada. The shaking intensities are then modified with local site amplification factors based on the Canadian highway bridge design code values. The inventory model provides a database of existing bridges based on open-access data which are then classified according to their seismic vulnerability. The damage model assesses seismic performance of classes of bridges by applying respective fragility functions represented as probabilistic relationships between the intensity measure and the degree of expected damage. The impact model evaluates the post-earthquake traffic-carrying capacity of the highway network based on the predicted damage including repair cost as a percentage of replacement cost of bridges and inspection priority. The web-application is demonstrated with a bridge network in Quebec City including 117 bridges subjected to 180 earthquake scenarios. The proposed methodology is particularly useful to facilitate direct communication of potential impacts to emergency managers and city transport officials.
© 2023, The Author(s).\n
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\n \n\n \n \n \n \n \n \n Correction: calibration of the PM4Sand model for hard-rock mine tailings based on laboratory and field testing results (Can.Geotech.J. 60: 966–977).\n \n \n \n \n\n\n \n Contreras, C. A.; Yniesta, S.; Jahanbakhshzadeh, A.; and Aubertin, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 60(12): 1984 - . 2023.\n \n\n\n\n
\n\n\n\n \n \n \"Correction:Paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20235115232948 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Correction: calibration of the PM4Sand model for hard-rock mine tailings based on laboratory and field testing results (Can.Geotech.J. 60: 966–977)},\njournal = {Canadian Geotechnical Journal},\nauthor = {Contreras, Carlos Andres and Yniesta, Samuel and Jahanbakhshzadeh, Abtin and Aubertin, Michel},\nvolume = {60},\nnumber = {12},\nyear = {2023},\npages = {1984 - },\nissn = {00083674},\nURL = {http://dx.doi.org/10.1139/cgj-2023-0509},\n} \n\n\n
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\n \n\n \n \n \n \n \n \n O.I.C.-based design of extruded and welded aluminum I-sections.\n \n \n \n \n\n\n \n Dahboul, S.; Li, L.; Coderre, T.; and Boissonnade, N.\n\n\n \n\n\n\n Structures, 58. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"O.I.C.-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20235015221061 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {O.I.C.-based design of extruded and welded aluminum I-sections},\njournal = {Structures},\nauthor = {Dahboul, Sahar and Li, Liya and Coderre, Tristan and Boissonnade, Nicolas},\nvolume = {58},\nyear = {2023},\nissn = {23520124},\nabstract = {<div data-language="eng" data-ev-field="abstract">Current standards rely on simplified approaches to predict the resistance of aluminum structural elements that can be shown to inadequately account for the effects of strain hardening, instabilities, and heat reduced properties. This paper summarizes investigations towards the development of an alternative design method for aluminum open cross-sections, based on the Overall Interaction Concept (O.I.C.). This innovative design approach relies on the interaction between resistance and stability, and also allows to consider geometrical and material imperfections. Moreover, it allows to obtain direct, precise and consistent resistance predictions using continuous buckling curves. A numerical finite element model was developed to accurately predict the resistance of aluminum cross-sections. Its efficiency was validated by comparing its numerical predictions of resistance to available experimental test data. Extensive parametric studies were then conducted, allowing to study the impact of varying geometries, aluminium alloys and load cases on the resistance. Using the results from more than 2 300 numerical simulations, O.I.C.-type design proposals were formulated for the local resistance of extruded and welded aluminum sections. The performance of the design equations was evaluated by comparing their resistance estimates to the reference numerical results and to resistance predictions from the Canadian, European, and American aluminum design standards. The comparisons showed that the O.I.C. design proposal leads to much more accurate and consistent results than these standards, while remaining simpler and more efficient.<br/></div> © 2023 Institution of Structural Engineers},\nkey = {Forecasting},\n%keywords = {Buckling;Design;Heat resistance;Strain hardening;Welding;},\n%note = {Aluminum I-section;Combined load case;Concept-based;Design proposal;I-sections;Interaction concepts;Local buckling;Overall interaction concept;Simple and combined load case;Simple++;},\nURL = {http://dx.doi.org/10.1016/j.istruc.2023.105504},\n} \n\n\n
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Current standards rely on simplified approaches to predict the resistance of aluminum structural elements that can be shown to inadequately account for the effects of strain hardening, instabilities, and heat reduced properties. This paper summarizes investigations towards the development of an alternative design method for aluminum open cross-sections, based on the Overall Interaction Concept (O.I.C.). This innovative design approach relies on the interaction between resistance and stability, and also allows to consider geometrical and material imperfections. Moreover, it allows to obtain direct, precise and consistent resistance predictions using continuous buckling curves. A numerical finite element model was developed to accurately predict the resistance of aluminum cross-sections. Its efficiency was validated by comparing its numerical predictions of resistance to available experimental test data. Extensive parametric studies were then conducted, allowing to study the impact of varying geometries, aluminium alloys and load cases on the resistance. Using the results from more than 2 300 numerical simulations, O.I.C.-type design proposals were formulated for the local resistance of extruded and welded aluminum sections. The performance of the design equations was evaluated by comparing their resistance estimates to the reference numerical results and to resistance predictions from the Canadian, European, and American aluminum design standards. The comparisons showed that the O.I.C. design proposal leads to much more accurate and consistent results than these standards, while remaining simpler and more efficient.
© 2023 Institution of Structural Engineers\n
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\n \n\n \n \n \n \n \n \n Reactive transport model predicting calcite precipitation: Case of a dynamically operated standing column well.\n \n \n \n \n\n\n \n Cerclet, L.; Courcelles, B.; and Pasquier, P.\n\n\n \n\n\n\n Geothermics, 115. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ReactivePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233814769355 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Reactive transport model predicting calcite precipitation: Case of a dynamically operated standing column well},\njournal = {Geothermics},\nauthor = {Cerclet, Leo and Courcelles, Benoit and Pasquier, Philippe},\nvolume = {115},\nyear = {2023},\nissn = {03756505},\nabstract = {<div data-language="eng" data-ev-field="abstract">The sanding column well is a promising ground heat exchanger. Nevertheless, hard water can lead to scaling problems. The aim of this study is to calibrate a thermo-hydro-chemical model on experimental data to quantify the factors influencing the scaling. Groundwater samples were collected during 70 days on a standing column well operated jointly with a groundwater treatment unit. A coupled thermo-hydro-chemical model integrating nine aqueous species, calcite mineral reactions, CO<inf>2</inf> degassing, and temperature dependent reactions was developed and calibrated on the experimental measurements. Calibration results indicated a precipitated calcite mass of a few nanograms per day. It was observed numerically that when bleed is not active, treating only 2% of the flowrate avoids calcite precipitation. If sealing the wellhead and limiting CO<inf>2</inf> degassing are possible, the simulation results indicate a reduction in precipitated calcite masses of 36%.<br/></div> © 2023},\nkey = {Carbon dioxide},\n%keywords = {Calcite;Degassing;Groundwater;Precipitation (chemical);Water treatment;},\n%note = {Calcite precipitation;Carbonate scaling;Chemical model;Ground heat exchangers;Ground-coupled heat pump systems;Hard water;Reactive transport modelling;Scaling problem;Standing column wells;Thermo-hydro-chemical model;},\nURL = {http://dx.doi.org/10.1016/j.geothermics.2023.102828},\n} \n\n\n
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The sanding column well is a promising ground heat exchanger. Nevertheless, hard water can lead to scaling problems. The aim of this study is to calibrate a thermo-hydro-chemical model on experimental data to quantify the factors influencing the scaling. Groundwater samples were collected during 70 days on a standing column well operated jointly with a groundwater treatment unit. A coupled thermo-hydro-chemical model integrating nine aqueous species, calcite mineral reactions, CO2 degassing, and temperature dependent reactions was developed and calibrated on the experimental measurements. Calibration results indicated a precipitated calcite mass of a few nanograms per day. It was observed numerically that when bleed is not active, treating only 2% of the flowrate avoids calcite precipitation. If sealing the wellhead and limiting CO2 degassing are possible, the simulation results indicate a reduction in precipitated calcite masses of 36%.
© 2023\n
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\n \n\n \n \n \n \n \n \n Synergy between green stormwater infrastructure and active mobility: A comprehensive literature review.\n \n \n \n \n\n\n \n Lemieux, C.; Bichai, F.; and Boisjoly, G.\n\n\n \n\n\n\n Sustainable Cities and Society, 99. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"SynergyPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233814748147 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Synergy between green stormwater infrastructure and active mobility: A comprehensive literature review},\njournal = {Sustainable Cities and Society},\nauthor = {Lemieux, Charlotte and Bichai, Francoise and Boisjoly, Genevieve},\nvolume = {99},\nyear = {2023},\nissn = {22106707},\nabstract = {<div data-language="eng" data-ev-field="abstract">Green stormwater infrastructure (GSI) is increasingly used in urban planning to replace grey infrastructure and achieve socio-environmental benefits. Its design can result in a substantial reallocation of space and thereby contribute to active mobility (walking and cycling), especially when implemented in the right-of-way. Yet, few studies have investigated the relationship between GSI and active mobility. This paper comprehensively reviews 70 scientific articles on GSI and more broadly green infrastructure (GI) in the context of active mobility. Our primary aim is to assess the potential synergy between GSI and active mobility. While empirical studies on GSI and active mobility are lacking, the review highlights the potential effects of GSI based on their common characteristics with GI. The main potential benefits identified are increasing active travel, enhancing road safety and improving street aesthetics. The review also addresses car mobility, safety and aesthetic concerns associated with GSI implementation. Findings demonstrate the complex relationship between GI, GSI, and active mobility, warranting further studies to understand the nuanced effects of different types of infrastructure on active travel. This study is relevant for researchers and planners seeking insights into GSI specificities to better guide future studies and projects supporting both urban water management and active mobility.<br/></div> © 2023},\nkey = {Water management},\n%keywords = {Motor transportation;Storms;Urban planning;},\n%note = {Active mobility;Environmental benefits;Green infrastructure;Green stormwater infrastructure;Integrated planning;Literature reviews;Right of way;Rights-of-way;Stormwaters;Urban design;},\nURL = {http://dx.doi.org/10.1016/j.scs.2023.104900},\n} \n\n\n
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Green stormwater infrastructure (GSI) is increasingly used in urban planning to replace grey infrastructure and achieve socio-environmental benefits. Its design can result in a substantial reallocation of space and thereby contribute to active mobility (walking and cycling), especially when implemented in the right-of-way. Yet, few studies have investigated the relationship between GSI and active mobility. This paper comprehensively reviews 70 scientific articles on GSI and more broadly green infrastructure (GI) in the context of active mobility. Our primary aim is to assess the potential synergy between GSI and active mobility. While empirical studies on GSI and active mobility are lacking, the review highlights the potential effects of GSI based on their common characteristics with GI. The main potential benefits identified are increasing active travel, enhancing road safety and improving street aesthetics. The review also addresses car mobility, safety and aesthetic concerns associated with GSI implementation. Findings demonstrate the complex relationship between GI, GSI, and active mobility, warranting further studies to understand the nuanced effects of different types of infrastructure on active travel. This study is relevant for researchers and planners seeking insights into GSI specificities to better guide future studies and projects supporting both urban water management and active mobility.
© 2023\n
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\n \n\n \n \n \n \n \n \n Modelling the Flexural Hysteresis Behaviour of Bretelle Dampers Based on a Quasi-Static Bending Test.\n \n \n \n \n\n\n \n Zamanian, S.; Langlois, S.; Loignon, A.; Savadkoohi, A. T.; and Francois, M. L. M.\n\n\n \n\n\n\n IEEE Transactions on Power Delivery, 38(6): 4081 - 4089. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ModellingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233514639871 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modelling the Flexural Hysteresis Behaviour of Bretelle Dampers Based on a Quasi-Static Bending Test},\njournal = {IEEE Transactions on Power Delivery},\nauthor = {Zamanian, Shima and Langlois, Sebastien and Loignon, Alex and Savadkoohi, Alireza Ture and Francois, Marc L. M.},\nvolume = {38},\nnumber = {6},\nyear = {2023},\npages = {4081 - 4089},\nissn = {08858977},\nabstract = {<div data-language="eng" data-ev-field="abstract">Bretelle dampers are made of slack conductor pieces that are used to mitigate aeolian vibration amplitudes. Under cyclic and dynamic excitation, inter-strand friction in slack conductors causes a significant flexural hysteresis leading to the dissipation of high amounts of energies. The objective of this work is to study the flexural hysteresis of three types of slack conductors based on quasi-static bending tests and to reproduce their nonlinear hysteresis behavior using two different approaches; an analytical model using a linear Euler-Bernoulli beam coupled with a Bouc-Wen model, and a finite element model using a superposition of multifiber beam elements with material nonlinearity. The parameters of both models are identified based on the bending test results for different levels of deformation. The developed models in this study can provide a fast tool for manufacturers to identify the dynamical behavior of slack conductor and to optimize their damping properties. Furthermore, the bretelle damper model can be integrated into a conductor model in order to study the vibrational behavior of transmission lines equipped with bretelle dampers.<br/></div> © 2023 IEEE.},\nkey = {Finite element method},\n%keywords = {Analytical models;Bending tests;Damping;Electric lines;Hysteresis;Shock absorbers;Vibration analysis;},\n%note = {Bending;Bouc-wen;Bretelle damper;Conductor;Finite element analyse;Hysteresis behavior;Quasi-static;Static bending tests;Transmission-line;},\nURL = {http://dx.doi.org/10.1109/TPWRD.2023.3307907},\n} \n\n\n
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Bretelle dampers are made of slack conductor pieces that are used to mitigate aeolian vibration amplitudes. Under cyclic and dynamic excitation, inter-strand friction in slack conductors causes a significant flexural hysteresis leading to the dissipation of high amounts of energies. The objective of this work is to study the flexural hysteresis of three types of slack conductors based on quasi-static bending tests and to reproduce their nonlinear hysteresis behavior using two different approaches; an analytical model using a linear Euler-Bernoulli beam coupled with a Bouc-Wen model, and a finite element model using a superposition of multifiber beam elements with material nonlinearity. The parameters of both models are identified based on the bending test results for different levels of deformation. The developed models in this study can provide a fast tool for manufacturers to identify the dynamical behavior of slack conductor and to optimize their damping properties. Furthermore, the bretelle damper model can be integrated into a conductor model in order to study the vibrational behavior of transmission lines equipped with bretelle dampers.
© 2023 IEEE.\n
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\n \n\n \n \n \n \n \n \n Numerical study of the seismic performance of fully grouted reinforced masonry shear walls with boundary elements subjected to dynamic loading.\n \n \n \n \n\n\n \n AbdAllah, A.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 295. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233814757935 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical study of the seismic performance of fully grouted reinforced masonry shear walls with boundary elements subjected to dynamic loading},\njournal = {Engineering Structures},\nauthor = {AbdAllah, AbdelRahman and AbdelRahman, Belal and Galal, Khaled},\nvolume = {295},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Reinforced masonry shear walls with boundary elements (RMSW + BEs) have enhanced curvature and displacement ductility and more energy dissipation than their rectangular counterparts when subjected to quasistatic cyclic loading. However, the behavior of walls tested under quasistatic cyclic loading is different from that under dynamic loading. Although there are many studies in the literature regarding the seismic response of RMSW + BEs, there is a gap in understanding the seismic performance parameters of RMSW + BEs when subjected to dynamic loading. Therefore, in this study, a numerical investigation of the seismic behavior of twelve previously tested half-scaled fully grouted RMSW + BEs was performed to quantify the seismic performance parameters of the walls under quasistatic cyclic loading and incremental dynamic loading. The studied walls have different design parameters that cover different aspect ratios, applied axial stress, horizontal and vertical reinforcement ratios, confinement type in boundary elements (BEs), discontinuity in BEs at upper floors and the presence of interstory slabs. A 2D numerical macromodel was developed using the Extreme Loading for Structures (ELS) software to validate and simulate the nonlinear lateral cyclic response of the studied walls. A nonlinear time-history analysis (NLTHA) was carried out using seven pairs of simulated ground motion records developed by Atkinson to represent Eastern Canada earthquake regions (i.e., Montreal, Quebec). The results showed good agreement between the walls’ results among the two loading protocols to better estimate and correlate the walls’ dynamic performance from quasistatic cyclic testing. The quasistatic loading results showed conservative lateral performance compared to dynamic loading in terms of stiffnesses, lateral capacity and energy dissipation. Moreover, the effect of different design parameters has been inspected on the dynamic performance of RMSW + BEs. Increasing the wall aspect ratio led to lower wall stiffnesses and lateral capacities at different loading stages. More energy dissipation and lateral capacity levels were observed when utilizing higher axial stresses on the walls. This study's findings will help better predict and estimate the lateral behavior of RMSW + BEs to help develop subsequent editions of the North American design standards for masonry structures.<br/></div> © 2023 Elsevier Ltd},\nkey = {Energy dissipation},\n%keywords = {Aspect ratio;Boundary element method;Concrete construction;Cyclic loads;Earthquakes;Grouting;Mortar;Nonlinear analysis;Numerical methods;Reinforced concrete;Seismic response;Seismic waves;Shear walls;Stiffness;},\n%note = {Applied element method;Boundary elements;Concrete masonry;Dynamic loadings;Element method;Incremental dynamic analysis;Masonry shear walls;Quasi-static loading;Reinforced masonry;Seismic Performance;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.116804},\n} \n\n\n
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Reinforced masonry shear walls with boundary elements (RMSW + BEs) have enhanced curvature and displacement ductility and more energy dissipation than their rectangular counterparts when subjected to quasistatic cyclic loading. However, the behavior of walls tested under quasistatic cyclic loading is different from that under dynamic loading. Although there are many studies in the literature regarding the seismic response of RMSW + BEs, there is a gap in understanding the seismic performance parameters of RMSW + BEs when subjected to dynamic loading. Therefore, in this study, a numerical investigation of the seismic behavior of twelve previously tested half-scaled fully grouted RMSW + BEs was performed to quantify the seismic performance parameters of the walls under quasistatic cyclic loading and incremental dynamic loading. The studied walls have different design parameters that cover different aspect ratios, applied axial stress, horizontal and vertical reinforcement ratios, confinement type in boundary elements (BEs), discontinuity in BEs at upper floors and the presence of interstory slabs. A 2D numerical macromodel was developed using the Extreme Loading for Structures (ELS) software to validate and simulate the nonlinear lateral cyclic response of the studied walls. A nonlinear time-history analysis (NLTHA) was carried out using seven pairs of simulated ground motion records developed by Atkinson to represent Eastern Canada earthquake regions (i.e., Montreal, Quebec). The results showed good agreement between the walls’ results among the two loading protocols to better estimate and correlate the walls’ dynamic performance from quasistatic cyclic testing. The quasistatic loading results showed conservative lateral performance compared to dynamic loading in terms of stiffnesses, lateral capacity and energy dissipation. Moreover, the effect of different design parameters has been inspected on the dynamic performance of RMSW + BEs. Increasing the wall aspect ratio led to lower wall stiffnesses and lateral capacities at different loading stages. More energy dissipation and lateral capacity levels were observed when utilizing higher axial stresses on the walls. This study's findings will help better predict and estimate the lateral behavior of RMSW + BEs to help develop subsequent editions of the North American design standards for masonry structures.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Aerial photogrammetry to characterise and numerically model an ice jam in Southern Quebec.\n \n \n \n \n\n\n \n Duguay, J.; Lindenschmidt, K.; Trudel, M.; and Pruneau, A.\n\n\n \n\n\n\n Hydrology Research, 54(11): 1329 - 1343. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"AerialPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20235015191891 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Aerial photogrammetry to characterise and numerically model an ice jam in Southern Quebec},\njournal = {Hydrology Research},\nauthor = {Duguay, Jason and Lindenschmidt, Karl-Erich and Trudel, Melanie and Pruneau, Antoine},\nvolume = {54},\nnumber = {11},\nyear = {2023},\npages = {1329 - 1343},\nissn = {19989563},\nabstract = {<div data-language="eng" data-ev-field="abstract">Collecting data on the dynamic breakup of a river’s ice cover is a notoriously difficult task. However, such data are necessary to reconstruct the events leading to the formation of ice jams and calibrate numerical ice jam models. Photogrammetry using images from remotely piloted aircraft (RPA) is a cost-effective and rapid technique to produce large-scale orthomosaics and digital elevation maps (DEMs) of an ice jam. Herein, we apply RPA photogrammetry to document an ice jam that formed on a river in southern Quebec in the winter of 2022. Composite orthomosaics of the 2-km ice jam provided evidence of overbanking flow, hinge cracks near the banks and lengthy longitudinal stress cracks in the ice jam caused by sagging as the flow abated. DEMs helped identify zones where the ice rubble was grounded to the bed, thus allowing ice jam thickness estimates to be made in these locations. The datasets were then used to calibrate a one-dimensional numerical model of the ice jam. The model will be used in subsequent work to assess the risk of ice interacting with the superstructure of a low-level bridge in the reach and assess the likelihood of ice jam flooding of nearby residences.<br/></div> © 2023 IWA Publishing. All rights reserved.},\nkey = {Numerical models},\n%keywords = {Antennas;Cost effectiveness;Ice;Photogrammetry;Remote sensing;Risk assessment;Rivers;Unmanned aerial vehicles (UAV);},\n%note = {Aerial photogrammetry;Cost effective;Digital Elevation Map;Ice cover;Ice jams;Large-scales;Longitudinal stress;Remote-sensing;Remotely piloted aircraft;River ice;},\nURL = {http://dx.doi.org/10.2166/nh.2023.010},\n} \n\n\n
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Collecting data on the dynamic breakup of a river’s ice cover is a notoriously difficult task. However, such data are necessary to reconstruct the events leading to the formation of ice jams and calibrate numerical ice jam models. Photogrammetry using images from remotely piloted aircraft (RPA) is a cost-effective and rapid technique to produce large-scale orthomosaics and digital elevation maps (DEMs) of an ice jam. Herein, we apply RPA photogrammetry to document an ice jam that formed on a river in southern Quebec in the winter of 2022. Composite orthomosaics of the 2-km ice jam provided evidence of overbanking flow, hinge cracks near the banks and lengthy longitudinal stress cracks in the ice jam caused by sagging as the flow abated. DEMs helped identify zones where the ice rubble was grounded to the bed, thus allowing ice jam thickness estimates to be made in these locations. The datasets were then used to calibrate a one-dimensional numerical model of the ice jam. The model will be used in subsequent work to assess the risk of ice interacting with the superstructure of a low-level bridge in the reach and assess the likelihood of ice jam flooding of nearby residences.
© 2023 IWA Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n A modified decay method based on a proposed uniformity index for measuring air change rates in non-uniform air mixed spaces.\n \n \n \n \n\n\n \n Reda, I.; Ali, E.; Qi, D.; Wang, L. (.; Stathopoulos, T.; and Athienitis, A.\n\n\n \n\n\n\n Building and Environment, 245. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234314938097 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A modified decay method based on a proposed uniformity index for measuring air change rates in non-uniform air mixed spaces},\njournal = {Building and Environment},\nauthor = {Reda, Ibrahim and Ali, Eslam and Qi, Dahai and Wang, Liangzhu (Leon) and Stathopoulos, Theodore and Athienitis, Andreas},\nvolume = {245},\nyear = {2023},\nissn = {03601323},\nabstract = {<div data-language="eng" data-ev-field="abstract">Building ventilation is essential during COVID-19 to reduce airborne viral transmission risks, while accurately estimating air change rates remains quite challenging. Due to the tracer gas method's assumption of uniform air mixing in a space, which is often not the case. However, the existing mixing models such as mixing factor (K) and zone distribution effectiveness (E<inf>z</inf>) are limited to decrease the uncertainty of this assumption since their reported data are subjective, rough estimates, and inconsistent across different standards (e.g., ASHRAE and AIHA). Therefore, in this study, a novel modified decay method (MDM) is developed, where a proposed uniformity index (U<inf>i</inf>) is integrated into the original decay method (ODM) to quantify the non-uniform air mixing and thereby improve the estimation of air change rates. We validated the proposed method in a real classroom using CO<inf>2</inf> as a tracer gas. Wherein, the spatial variations of CO<inf>2</inf> concentrations were measured at various locations using an automated system of a mass spectrometer with a 16-position valve. Later, the estimated air change rates using both the ODM and MDM were compared with the measured ones. It was found that the proposed U<inf>i</inf> significantly decreased the error caused by the uniform-mixing assumption of estimated air change rates using ODM from 25.6 % to 3.4 % estimated by MDM at the outlet location. Similarly, the average concentrations of 16 distributed sensors at the breathing level also showed a decrease in error from 25.0 % to 2.5 %. This study can be applied to improve ventilation performance in buildings.<br/></div> © 2023 Elsevier Ltd},\nkey = {Ventilation},\n%keywords = {Automation;Carbon dioxide;Mixing;Risk perception;Uncertainty analysis;},\n%note = {Air change rate;Air changes;Air mixing;Air mixing uniformity;CO2 monitoring;Decay methods;Mixing uniformities;Tracer gas;Uniformity index;Well-mixed space;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2023.110941},\n} \n\n\n
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Building ventilation is essential during COVID-19 to reduce airborne viral transmission risks, while accurately estimating air change rates remains quite challenging. Due to the tracer gas method's assumption of uniform air mixing in a space, which is often not the case. However, the existing mixing models such as mixing factor (K) and zone distribution effectiveness (Ez) are limited to decrease the uncertainty of this assumption since their reported data are subjective, rough estimates, and inconsistent across different standards (e.g., ASHRAE and AIHA). Therefore, in this study, a novel modified decay method (MDM) is developed, where a proposed uniformity index (Ui) is integrated into the original decay method (ODM) to quantify the non-uniform air mixing and thereby improve the estimation of air change rates. We validated the proposed method in a real classroom using CO2 as a tracer gas. Wherein, the spatial variations of CO2 concentrations were measured at various locations using an automated system of a mass spectrometer with a 16-position valve. Later, the estimated air change rates using both the ODM and MDM were compared with the measured ones. It was found that the proposed Ui significantly decreased the error caused by the uniform-mixing assumption of estimated air change rates using ODM from 25.6 % to 3.4 % estimated by MDM at the outlet location. Similarly, the average concentrations of 16 distributed sensors at the breathing level also showed a decrease in error from 25.0 % to 2.5 %. This study can be applied to improve ventilation performance in buildings.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Effect of CFRP anchorages on the flexural behavior of externally strengthened reinforced concrete beams.\n \n \n \n \n\n\n \n Abdalla, J. A.; Ali, A. B.; Hawileh, R. A.; Mhanna, H. H.; Galal, K. E.; and Saqan, E. I.\n\n\n \n\n\n\n Archives of Civil and Mechanical Engineering, 23(4). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"EffectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234214886130 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of CFRP anchorages on the flexural behavior of externally strengthened reinforced concrete beams},\njournal = {Archives of Civil and Mechanical Engineering},\nauthor = {Abdalla, Jamal A. and Ali, Alnadher B. and Hawileh, Rami A. and Mhanna, Haya H. and Galal, Khalid E. and Saqan, Elias I.},\nvolume = {23},\nnumber = {4},\nyear = {2023},\nissn = {16449665},\nabstract = {<div data-language="eng" data-ev-field="abstract">Advanced composite materials in the form of fiber-reinforced polymer (FRP) have been gaining popularity in the construction industry. One of the main challenges of using externally bonded FRP in repair and strengthening applications is its susceptibility to peeling-off or delamination without achieving the full capacity of the FRP material. Anchoring the FRP laminates has been deemed effective in delaying debonding failure, thus ensuring load continuity between the concrete and FRP. This paper aims to study the effect of two anchorage systems on the strength and ductility of reinforced concrete (RC) beams strengthened with carbon FRP (CFRP) laminates. The anchors considered in this study were end U-wraps and CFRP spike anchors. A total of seven RC beams were cast and strengthened with different arrangements of CFRP laminates and anchors. The test parameters investigated in this study include the length of the FRP sheet, type of anchor, and the number of CFRP spike anchors. Test results showed that flexural strengthening using CFRP laminates enhanced the capacity of the unstrengthened beam by 16–41% at the expense of ductility. Using full-length CFRP sheets significantly improved the overall performance of the beams as opposed to short-length CFRP sheets. Out of the anchored specimens, the best improvement in the capacity was achieved in the specimen anchored with end U-wraps. CFRP spike anchors provided limited enhancement in the load-carrying capacity of the specimens. The efficiency of the spike anchors could be upgraded if longer embedment depth and larger dowel diameter were used. Finally, the ACI440.2R-17 strength predictions were in good agreement with the experimental results.<br/></div> © 2023, Wroclaw University of Science and Technology.},\nkey = {Anchors},\n%keywords = {Anchorages (foundations);Carbon fiber reinforced plastics;Concrete beams and girders;Construction industry;Ductility;Reinforced concrete;},\n%note = {Carbon fibre reinforced polymer;Carbon FRP;Fiber-reinforced polymer spike anchor;Fiber-reinforced polymers;Fibre reinforced polymer laminates;Fibre reinforced polymers;Flexural strengthening;Reinforced concrete beams;Spike anchors;U-wrap;},\nURL = {http://dx.doi.org/10.1007/s43452-023-00784-7},\n} \n\n\n
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Advanced composite materials in the form of fiber-reinforced polymer (FRP) have been gaining popularity in the construction industry. One of the main challenges of using externally bonded FRP in repair and strengthening applications is its susceptibility to peeling-off or delamination without achieving the full capacity of the FRP material. Anchoring the FRP laminates has been deemed effective in delaying debonding failure, thus ensuring load continuity between the concrete and FRP. This paper aims to study the effect of two anchorage systems on the strength and ductility of reinforced concrete (RC) beams strengthened with carbon FRP (CFRP) laminates. The anchors considered in this study were end U-wraps and CFRP spike anchors. A total of seven RC beams were cast and strengthened with different arrangements of CFRP laminates and anchors. The test parameters investigated in this study include the length of the FRP sheet, type of anchor, and the number of CFRP spike anchors. Test results showed that flexural strengthening using CFRP laminates enhanced the capacity of the unstrengthened beam by 16–41% at the expense of ductility. Using full-length CFRP sheets significantly improved the overall performance of the beams as opposed to short-length CFRP sheets. Out of the anchored specimens, the best improvement in the capacity was achieved in the specimen anchored with end U-wraps. CFRP spike anchors provided limited enhancement in the load-carrying capacity of the specimens. The efficiency of the spike anchors could be upgraded if longer embedment depth and larger dowel diameter were used. Finally, the ACI440.2R-17 strength predictions were in good agreement with the experimental results.
© 2023, Wroclaw University of Science and Technology.\n
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\n \n\n \n \n \n \n \n \n Pile length estimation based on guided wave theory and dispersion analysis for reuse of foundations.\n \n \n \n \n\n\n \n Cui, S.; Liu, H.; and Maghoul, P.\n\n\n \n\n\n\n International Journal of Solids and Structures, 283. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"PilePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234014831600 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Pile length estimation based on guided wave theory and dispersion analysis for reuse of foundations},\njournal = {International Journal of Solids and Structures},\nauthor = {Cui, Shihao and Liu, Hongwei and Maghoul, Pooneh},\nvolume = {283},\nyear = {2023},\nissn = {00207683},\nabstract = {<div data-language="eng" data-ev-field="abstract">The construction of new structures on existing pile foundations can significantly reduce the overall project costs. The reuse of foundations requires information on the embedded depth of existing piles, which is not always known. In this paper, a novel technique based on the periodic analysis of the phase difference and the 3-dimensional guided wave theory was developed to effectively estimate the embedded depth of unknown foundations. In this method, the guided wave model of a cylindrical pile is built by the spectral element method to determine the dispersion relation. A modified Ridders’ algorithm is proposed for root-searching. According to the phase difference of the responses collected by at least two sensors located on top or the lateral side of the pile, and the dispersion relation obtained by the spectral element method, the dispersion analysis diagram can be obtained to show the relationship between the phase difference and the wavenumber. Through the periodic properties of the dispersion analysis diagram, the pile length can be estimated. Furthermore, the periodic analysis of the phase difference for the signals collected on top of the pile is conducted in this paper using the 3-dimensional guided wave model-based dispersion relation. By comparing with synthetic and experimental data, it was shown that the proposed method can achieve an accuracy of greater than 95% in estimating the pile length of unknown foundations.<br/></div> © 2023 Elsevier Ltd},\nkey = {Guided electromagnetic wave propagation},\n%keywords = {Dispersion (waves);Dispersions;Pile foundations;Piles;Quantum theory;},\n%note = {Dispersion analysis;Dispersion relations;Length estimation;Phase difference;Pile length;Pile length estimation;Reuse;Ridder’ algorithm;Spectral element method;Wave theory;},\nURL = {http://dx.doi.org/10.1016/j.ijsolstr.2023.112486},\n} \n\n\n
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The construction of new structures on existing pile foundations can significantly reduce the overall project costs. The reuse of foundations requires information on the embedded depth of existing piles, which is not always known. In this paper, a novel technique based on the periodic analysis of the phase difference and the 3-dimensional guided wave theory was developed to effectively estimate the embedded depth of unknown foundations. In this method, the guided wave model of a cylindrical pile is built by the spectral element method to determine the dispersion relation. A modified Ridders’ algorithm is proposed for root-searching. According to the phase difference of the responses collected by at least two sensors located on top or the lateral side of the pile, and the dispersion relation obtained by the spectral element method, the dispersion analysis diagram can be obtained to show the relationship between the phase difference and the wavenumber. Through the periodic properties of the dispersion analysis diagram, the pile length can be estimated. Furthermore, the periodic analysis of the phase difference for the signals collected on top of the pile is conducted in this paper using the 3-dimensional guided wave model-based dispersion relation. By comparing with synthetic and experimental data, it was shown that the proposed method can achieve an accuracy of greater than 95% in estimating the pile length of unknown foundations.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n 3-ply self-drilling screw connections for centre-sheathed steel shear walls.\n \n \n \n \n\n\n \n Wu, J. C.; and Rogers, C. A.\n\n\n \n\n\n\n Thin-Walled Structures, 192. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"3-plyPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233514647898 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {3-ply self-drilling screw connections for centre-sheathed steel shear walls},\njournal = {Thin-Walled Structures},\nauthor = {Wu, Jia Cheng and Rogers, Colin A.},\nvolume = {192},\nyear = {2023},\nissn = {02638231},\nabstract = {<div data-language="eng" data-ev-field="abstract">Design provisions for the shear resistance of double shear (3-ply) cold-formed steel screw connections are not provided by the existing CSA S136 and AISI S100 Standards. The resistance of the mid-ply layer of screwed double shear connections was investigated to determine whether the use of the bolt bearing provisions was a reasonable substitute. Forty-eight individual normal ductility steel connections with fastener diameters between 4.17 mm and 5.49 mm and inner sheet thicknesses between 0.36 mm and 1.09 mm, as used for previously constructed centre-sheathed shear walls, were tested. Bearing damage and a combination of bearing and tearing failure were observed. The strengths of the connections tended to increase as displacement progressed due to expansion of the bearing area. When a displacement limit of 6.35 mm was enforced, the tested strengths of the screw connections were a reasonable match to the bolt bearing provisions. The resistance factor &straightphi; for the double shear screwed connections was identified to be 0.54 (LRFD) and 0.43 (LSD).<br/></div> © 2023 Elsevier Ltd},\nkey = {Structural design},\n%keywords = {Infill drilling;Screws;Shear walls;Studs (structural members);},\n%note = {Bearing;Bolt bearing;Cold-formed steel;Connection;Design provisions;Double-shear;Screw connections;Shear resistances;Steel screws;Steel shear walls;},\nURL = {http://dx.doi.org/10.1016/j.tws.2023.111119},\n} \n\n\n
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Design provisions for the shear resistance of double shear (3-ply) cold-formed steel screw connections are not provided by the existing CSA S136 and AISI S100 Standards. The resistance of the mid-ply layer of screwed double shear connections was investigated to determine whether the use of the bolt bearing provisions was a reasonable substitute. Forty-eight individual normal ductility steel connections with fastener diameters between 4.17 mm and 5.49 mm and inner sheet thicknesses between 0.36 mm and 1.09 mm, as used for previously constructed centre-sheathed shear walls, were tested. Bearing damage and a combination of bearing and tearing failure were observed. The strengths of the connections tended to increase as displacement progressed due to expansion of the bearing area. When a displacement limit of 6.35 mm was enforced, the tested strengths of the screw connections were a reasonable match to the bolt bearing provisions. The resistance factor ϕ for the double shear screwed connections was identified to be 0.54 (LRFD) and 0.43 (LSD).
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Investigation of nonlinear control of galloping with a linear beam with elastic boundary conditions.\n \n \n \n \n\n\n \n Leroux, M.; Langlois, S.; and Ture Savadkoohi, A.\n\n\n \n\n\n\n International Journal of Non-Linear Mechanics, 156. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"InvestigationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233114458196 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigation of nonlinear control of galloping with a linear beam with elastic boundary conditions},\njournal = {International Journal of Non-Linear Mechanics},\nauthor = {Leroux, M. and Langlois, S. and Ture Savadkoohi, A.},\nvolume = {156},\nyear = {2023},\nissn = {00207462},\nabstract = {<div data-language="eng" data-ev-field="abstract">The aim of this study is nonlinear passive control of galloping oscillation on overhead transmission lines. The considered system is a linear beam subjected to harmonic and aerodynamic excitations which is coupled to a nonlinear absorber placed on an arbitrary position along the beam. Both extremities of the beam present rotationally and translationally elastic boundary conditions. After projection of spatio-temporal equations of the system on an arbitrary mode of the beam (the mode to be controlled), fast and slow system dynamics are traced which predict periodic or non periodic regimes. All analytical developments are compared with numerical results obtained from direct numerical integration of system equations and also from finite element modeling of the overall structure. Then, nonlinear passive control process of galloping instability by a non smooth nonlinear energy sink (NES) is investigated on a real case of galloping instability on a transmission line cable due to accretion of ice on it.<br/></div> © 2023 Elsevier Ltd},\nkey = {Boundary conditions},\n%keywords = {Finite element method;Ice;Numerical methods;Overhead lines;Transmissions;},\n%note = {Beam;Elastic boundary;Elastic boundary condition;Fast-slow dynamics;Finite element modelling (FEM);Galloping;Nonlinear energy sink;Nonlinear passive control;Passive control;Transmission-line;},\nURL = {http://dx.doi.org/10.1016/j.ijnonlinmec.2023.104484},\n} \n\n\n
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The aim of this study is nonlinear passive control of galloping oscillation on overhead transmission lines. The considered system is a linear beam subjected to harmonic and aerodynamic excitations which is coupled to a nonlinear absorber placed on an arbitrary position along the beam. Both extremities of the beam present rotationally and translationally elastic boundary conditions. After projection of spatio-temporal equations of the system on an arbitrary mode of the beam (the mode to be controlled), fast and slow system dynamics are traced which predict periodic or non periodic regimes. All analytical developments are compared with numerical results obtained from direct numerical integration of system equations and also from finite element modeling of the overall structure. Then, nonlinear passive control process of galloping instability by a non smooth nonlinear energy sink (NES) is investigated on a real case of galloping instability on a transmission line cable due to accretion of ice on it.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Experimental and analytical investigation on the use of NSM–BFRP and NSM–GFRP bars in strengthening corrosion–damaged RC slabs.\n \n \n \n \n\n\n \n Aljidda, O.; El Refai, A.; and Alnahhal, W.\n\n\n \n\n\n\n Composite Structures, 322. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233314534820 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental and analytical investigation on the use of NSM–BFRP and NSM–GFRP bars in strengthening corrosion–damaged RC slabs},\njournal = {Composite Structures},\nauthor = {Aljidda, Omar and El Refai, Ahmed and Alnahhal, Wael},\nvolume = {322},\nyear = {2023},\nissn = {02638223},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents the results of an experimental and analytical study on the flexural behavior of corrosion–damaged reinforced concrete (RC) slabs strengthened with different near–surface mounted fiber–reinforced polymer (NSM–FRP) bars. An accelerated corrosion technique was used to induce corrosion in the steel reinforcing bars of the tested slabs. The investigated parameters comprised the number of NSM–FRP bars (two and four bars), the type of the NSM–FRP reinforcement (basalt B and glass G bars), and the mass loss in the steel rebars due to corrosion (10 and 20%). The yielding and ultimate capacity of the strengthened slabs was not only restored but surpassed those of the virgin control slab. Slabs strengthened with two and four NSM–BFRP bars showed 32–42% increase in their yielding load and 45–50% in their ultimate loads, respectively, as compared to the unstrengthened corroded slab. Similarly, the strengthened slabs showed 5–50% increase in their ductility index as compared to the virgin slab. The strengthened slabs failed due to the yielding of the steel reinforcing bars followed by compression concrete crushing. ACI–440 formulations reasonably predicted the performance of the strengthened slabs with conservative capacities when ACI strain limit of 0.7 Ε<inf>fu</inf> was considered.<br/></div> © 2023},\nkey = {Ductility},\n%keywords = {Bars (metal);Basalt;Reinforced concrete;Steel corrosion;Steel fibers;Strain;Strengthening (metal);},\n%note = {Basalt fiber;Basalt fiber–reinforced polymer;BFRP bar;Fiber-reinforced polymers;Fibre reinforced polymers;Flexure;GFRP bars;Near surface mounted;Slab;Strengthening;},\nURL = {http://dx.doi.org/10.1016/j.compstruct.2023.117428},\n} \n\n\n
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This paper presents the results of an experimental and analytical study on the flexural behavior of corrosion–damaged reinforced concrete (RC) slabs strengthened with different near–surface mounted fiber–reinforced polymer (NSM–FRP) bars. An accelerated corrosion technique was used to induce corrosion in the steel reinforcing bars of the tested slabs. The investigated parameters comprised the number of NSM–FRP bars (two and four bars), the type of the NSM–FRP reinforcement (basalt B and glass G bars), and the mass loss in the steel rebars due to corrosion (10 and 20%). The yielding and ultimate capacity of the strengthened slabs was not only restored but surpassed those of the virgin control slab. Slabs strengthened with two and four NSM–BFRP bars showed 32–42% increase in their yielding load and 45–50% in their ultimate loads, respectively, as compared to the unstrengthened corroded slab. Similarly, the strengthened slabs showed 5–50% increase in their ductility index as compared to the virgin slab. The strengthened slabs failed due to the yielding of the steel reinforcing bars followed by compression concrete crushing. ACI–440 formulations reasonably predicted the performance of the strengthened slabs with conservative capacities when ACI strain limit of 0.7 Εfu was considered.
© 2023\n
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\n \n\n \n \n \n \n \n \n Retrieval of Surface Soil Moisture over Wheat Fields during Growing Season Using C-Band Polarimetric SAR Data.\n \n \n \n \n\n\n \n Goita, K.; Magagi, R.; Beauregard, V.; and Wang, H.\n\n\n \n\n\n\n Remote Sensing, 15(20). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"RetrievalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234515009093 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Retrieval of Surface Soil Moisture over Wheat Fields during Growing Season Using C-Band Polarimetric SAR Data},\njournal = {Remote Sensing},\nauthor = {Goita, Kalifa and Magagi, Ramata and Beauregard, Vincent and Wang, Hongquan},\nvolume = {15},\nnumber = {20},\nyear = {2023},\nissn = {20724292},\nabstract = {<div data-language="eng" data-ev-field="abstract">Accurate estimation and regular monitoring of soil moisture is very important for many agricultural, hydrological, or climatological applications. Our objective was to evaluate potential contributions of polarimetry to soil moisture estimation during crop growing cycles using RADARSAT-2 C-band images. The research focused on wheat field data collected during Soil Moisture Active Passive Validation Experiment (SMAPVEX12) conducted in 2012 in Manitoba (Canada). A sensitivity analysis was performed to select the most relevant non-polarimetric and polarimetric variables extracted from RADARSAT-2, and statistical models were developed to estimate soil moisture. In fine, three models were developed and validated: a non-polarimetric model based on cross-polarized backscattering coefficient (Formula presented.) ; a polarimetric mixed model using six polarimetric and non-polarimetric retained variables after the sensitivity analysis; and a simplified polarimetric mixed model considering only the phase difference ((Formula presented.)) and the co-polarized backscattering coefficient (Formula presented.). The validation reveals significant positive contributions of polarimetry. It shows that the non-polarimetric model has a much larger error (RMSE = 0.098 m<sup>3</sup>/m<sup>3</sup>) and explains only 19% of observed soil moisture variation compared to the polarimetric mixed model, which has an error of 0.087 m<sup>3</sup>/m<sup>3</sup>, with an explained variance of 44%. The simplified model has the lowest error (0.074 m<sup>3</sup>/m<sup>3</sup>) and explains 53.5% of soil moisture variation.<br/></div> © 2023 by the authors.},\nkey = {Soil moisture},\n%keywords = {Backscattering;Cultivation;Ellipsometry;Errors;Polarimeters;Sensitivity analysis;Soil surveys;Synthetic aperture radar;},\n%note = {C-bands;Growth cycle;Mixed modeling;Multiple linear models;Polarimetric decomposition;Polarimetric models;Radarsat-2;SMAPVEX12;Wheat fields;Wheat growth cycle;},\nURL = {http://dx.doi.org/10.3390/rs15204925},\n} \n\n\n
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Accurate estimation and regular monitoring of soil moisture is very important for many agricultural, hydrological, or climatological applications. Our objective was to evaluate potential contributions of polarimetry to soil moisture estimation during crop growing cycles using RADARSAT-2 C-band images. The research focused on wheat field data collected during Soil Moisture Active Passive Validation Experiment (SMAPVEX12) conducted in 2012 in Manitoba (Canada). A sensitivity analysis was performed to select the most relevant non-polarimetric and polarimetric variables extracted from RADARSAT-2, and statistical models were developed to estimate soil moisture. In fine, three models were developed and validated: a non-polarimetric model based on cross-polarized backscattering coefficient (Formula presented.) ; a polarimetric mixed model using six polarimetric and non-polarimetric retained variables after the sensitivity analysis; and a simplified polarimetric mixed model considering only the phase difference ((Formula presented.)) and the co-polarized backscattering coefficient (Formula presented.). The validation reveals significant positive contributions of polarimetry. It shows that the non-polarimetric model has a much larger error (RMSE = 0.098 m3/m3) and explains only 19% of observed soil moisture variation compared to the polarimetric mixed model, which has an error of 0.087 m3/m3, with an explained variance of 44%. The simplified model has the lowest error (0.074 m3/m3) and explains 53.5% of soil moisture variation.
© 2023 by the authors.\n
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\n \n\n \n \n \n \n \n \n Polynomial response surface-based transformation function for the performance improvement of low-fidelity models for concrete gravity dams.\n \n \n \n \n\n\n \n Torres Filho, R. J. d. A.; Segura, R. L.; and Paultre, P.\n\n\n \n\n\n\n Probabilistic Engineering Mechanics, 74. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"PolynomialPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234214912236 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Polynomial response surface-based transformation function for the performance improvement of low-fidelity models for concrete gravity dams},\njournal = {Probabilistic Engineering Mechanics},\nauthor = {Torres Filho, Rodrigo Jose de Almeida and Segura, Rocio L. and Paultre, Patrick},\nvolume = {74},\nyear = {2023},\nissn = {02668920},\nabstract = {<div data-language="eng" data-ev-field="abstract">The behavior of concrete gravity dams under seismic loading is a complex engineering problem dependent on a wide range of variables. Probabilistic methods can be used to evaluate the capacity of an individual or a portfolio of dams to withstand seismic events. However, due to the high number of re-evaluations required by such methods, simplified models that may not fully capture the complexity of the problem are frequently adopted in the evaluations. For a portfolio of dams that requires geometric uncertainty to be included in the list of controlled variables, the number of re-evaluations increases even further. This is a common engineering problem, where the cost-performance trade-off must be evaluated for every project. To address this issue, this study proposes a machine learning-based transformation function that improves the results obtained with a simplified method by converting low-fidelity data into high-fidelity data. The proposed procedure is applied to analyze the seismic response of a dam-reservoir-foundation system considering three approaches for geometric uncertainty, with increasing complexity. The final function takes as input low-fidelity observations, as well as geometric, material and seismic parameters, and outputs improved observations, with accuracy levels comparable to those obtained with a high-fidelity model but at a much lower cost. The sliding factor of safety resulting from a pseudostatic analysis is taken as the low-fidelity observation, and the sliding displacement from a nonlinear finite element analysis is selected as the high-fidelity observation. The resulting transformation function is then used to generate fragility curves for a well-documented case study dam, and the results using the proposed methodology and from a traditional fragility analysis are compared. It is observed that the proposed methodology to generate transformation functions is capable of correlating methods with radically different hypotheses, precision levels and even different outputs.<br/></div> © 2023},\nkey = {Uncertainty analysis},\n%keywords = {Concrete dams;Concretes;Cost engineering;Economic and social effects;Function evaluation;Geometry;Gravity dams;Metadata;Regression analysis;Safety factor;},\n%note = {Concrete gravity dams;Features selection;Geometric uncertainties;High-fidelity;Low fidelities;Re-evaluation;Regression modelling;Response surface;Seismic hazards;Transformation functions;},\nURL = {http://dx.doi.org/10.1016/j.probengmech.2023.103544},\n} \n\n\n
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The behavior of concrete gravity dams under seismic loading is a complex engineering problem dependent on a wide range of variables. Probabilistic methods can be used to evaluate the capacity of an individual or a portfolio of dams to withstand seismic events. However, due to the high number of re-evaluations required by such methods, simplified models that may not fully capture the complexity of the problem are frequently adopted in the evaluations. For a portfolio of dams that requires geometric uncertainty to be included in the list of controlled variables, the number of re-evaluations increases even further. This is a common engineering problem, where the cost-performance trade-off must be evaluated for every project. To address this issue, this study proposes a machine learning-based transformation function that improves the results obtained with a simplified method by converting low-fidelity data into high-fidelity data. The proposed procedure is applied to analyze the seismic response of a dam-reservoir-foundation system considering three approaches for geometric uncertainty, with increasing complexity. The final function takes as input low-fidelity observations, as well as geometric, material and seismic parameters, and outputs improved observations, with accuracy levels comparable to those obtained with a high-fidelity model but at a much lower cost. The sliding factor of safety resulting from a pseudostatic analysis is taken as the low-fidelity observation, and the sliding displacement from a nonlinear finite element analysis is selected as the high-fidelity observation. The resulting transformation function is then used to generate fragility curves for a well-documented case study dam, and the results using the proposed methodology and from a traditional fragility analysis are compared. It is observed that the proposed methodology to generate transformation functions is capable of correlating methods with radically different hypotheses, precision levels and even different outputs.
© 2023\n
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\n \n\n \n \n \n \n \n \n Validation of strain/energy-based pore pressure model in one-dimensional response analyses using centrifuge tests.\n \n \n \n \n\n\n \n Khashila, M.; Karray, M.; Hussien, M. N.; Ramirez, J.; and Chekired, M.\n\n\n \n\n\n\n Soil Dynamics and Earthquake Engineering, 173. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ValidationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233214489442 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Validation of strain/energy-based pore pressure model in one-dimensional response analyses using centrifuge tests},\njournal = {Soil Dynamics and Earthquake Engineering},\nauthor = {Khashila, Marwan and Karray, Mourad and Hussien, Mahmoud N. and Ramirez, Jenny and Chekired, Mohamed},\nvolume = {173},\nyear = {2023},\nissn = {02677261},\nabstract = {<div data-language="eng" data-ev-field="abstract">The results of cyclic strain-controlled tests performed on reconstituted specimens of Ottawa sand F-65 using the combined triaxial simple shear (T<inf>x</inf>SS) apparatus were used to establish a strain/energy-based pore pressure model. The model was utilized in conjunction with the sigmoid function (SIG4) to simulate the cyclic behavior of Ottawa F-65 sand under stress and strain loading conditions using FLAC at the element-level and in 1-D effective stress analysis. A counterpart set of cyclic stress-controlled direct simple shear (DSS) tests was performed to assess the predictive capability of the numerical model to determine the liquefaction potential curves. Two dynamic centrifuge tests were simulated using the proposed model and Finn model, and a satisfactory comparison of the observed and computed responses in terms of pore water pressure generation at different depths was obtained. Furthermore, model validation was carried out by applying real earthquakes from the Western United States (WUS) to a hypothetical soil deposit and then comparing the liquefaction triggering according to published liquefaction charts. A good agreement between the numerical results and the published charts confirms the applicability of the proposed strain/energy-based model in 1-D response analysis and liquefaction triggering assessment.<br/></div> © 2023 Elsevier Ltd},\nkey = {Pore pressure},\n%keywords = {Centrifuges;Pressure distribution;Soil liquefaction;Stress analysis;Water;},\n%note = {Centrifuge tests;Combined triaxial simple shear test;Direct simple shears;Energy concept;Energy-based;One-dimensional;Pore pressure model;Pore-water pressures;Response analysis;Simple shear test;},\nURL = {http://dx.doi.org/10.1016/j.soildyn.2023.108096},\n} \n\n\n
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The results of cyclic strain-controlled tests performed on reconstituted specimens of Ottawa sand F-65 using the combined triaxial simple shear (TxSS) apparatus were used to establish a strain/energy-based pore pressure model. The model was utilized in conjunction with the sigmoid function (SIG4) to simulate the cyclic behavior of Ottawa F-65 sand under stress and strain loading conditions using FLAC at the element-level and in 1-D effective stress analysis. A counterpart set of cyclic stress-controlled direct simple shear (DSS) tests was performed to assess the predictive capability of the numerical model to determine the liquefaction potential curves. Two dynamic centrifuge tests were simulated using the proposed model and Finn model, and a satisfactory comparison of the observed and computed responses in terms of pore water pressure generation at different depths was obtained. Furthermore, model validation was carried out by applying real earthquakes from the Western United States (WUS) to a hypothetical soil deposit and then comparing the liquefaction triggering according to published liquefaction charts. A good agreement between the numerical results and the published charts confirms the applicability of the proposed strain/energy-based model in 1-D response analysis and liquefaction triggering assessment.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Three-dimensional fully-Lagrangian DEM-SPH modeling of river ice interaction with control structures.\n \n \n \n \n\n\n \n Billy, C.; Shakibaeinia, A.; and Ghobrial, T.\n\n\n \n\n\n\n Cold Regions Science and Technology, 214. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"Three-dimensionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232914401039 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Three-dimensional fully-Lagrangian DEM-SPH modeling of river ice interaction with control structures},\njournal = {Cold Regions Science and Technology},\nauthor = {Billy, Clement and Shakibaeinia, Ahmad and Ghobrial, Tadros},\nvolume = {214},\nyear = {2023},\nissn = {0165232X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Ice control structures (ICSs) play a vital role in preventing ice jams and safeguarding communities by either stabilizing ice cover or relocating jams upstream. Understanding and modeling the interaction between ice floes and these structures is crucial for assessing their effectiveness and optimizing their designs. However, simulating these complex multi-physics systems poses challenges for numerical techniques. In this paper, we introduce and evaluate a fully-Lagrangian mesh-free continuum-discrete model based on the Smoothed Particles Hydrodynamics (SPH) method and Discrete Element Method (DEM) for three-dimensional (3D) simulation of ice interactions with control structures. To validate and parameterize the numerical model, we conduct two sets of experiments using real and artificial ice materials: (1) dam-break wave-ice-structure interaction and (2) ice-ICS interaction in an open channel. By comparing numerical and experimental results we demonstrate the capability and relative accuracy of our model. Our findings indicate that real ice generally exhibits faster jam evolution and ice passage through the ICS compared to artificial ice. Moreover, we identify the Froude number and ice material type as important factors influencing jam formation, evolution, and ICS effectiveness. Through sensitivity analysis of material properties, we highlight the significant impact of friction and restitution coefficients.<br/></div> © 2023 Elsevier B.V.},\nkey = {Finite difference method},\n%keywords = {Hydrodynamics;Integrated circuits;Lagrange multipliers;Mesh generation;Sensitivity analysis;},\n%note = {Control structure;Discrete element method (discrete element method ice-control structure;Discrete elements method;Ice interactions;Ice materials;Lagrangian;Mesh-free particle methods;Smoothed particle hydrodynamic;Smoothed particle hydrodynamics;},\nURL = {http://dx.doi.org/10.1016/j.coldregions.2023.103939},\n} \n\n\n
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Ice control structures (ICSs) play a vital role in preventing ice jams and safeguarding communities by either stabilizing ice cover or relocating jams upstream. Understanding and modeling the interaction between ice floes and these structures is crucial for assessing their effectiveness and optimizing their designs. However, simulating these complex multi-physics systems poses challenges for numerical techniques. In this paper, we introduce and evaluate a fully-Lagrangian mesh-free continuum-discrete model based on the Smoothed Particles Hydrodynamics (SPH) method and Discrete Element Method (DEM) for three-dimensional (3D) simulation of ice interactions with control structures. To validate and parameterize the numerical model, we conduct two sets of experiments using real and artificial ice materials: (1) dam-break wave-ice-structure interaction and (2) ice-ICS interaction in an open channel. By comparing numerical and experimental results we demonstrate the capability and relative accuracy of our model. Our findings indicate that real ice generally exhibits faster jam evolution and ice passage through the ICS compared to artificial ice. Moreover, we identify the Froude number and ice material type as important factors influencing jam formation, evolution, and ICS effectiveness. Through sensitivity analysis of material properties, we highlight the significant impact of friction and restitution coefficients.
© 2023 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n A single-sensor system for length estimation of unknown piles using guided waves.\n \n \n \n \n\n\n \n Cui, S.; and Maghoul, P.\n\n\n \n\n\n\n Mechanical Systems and Signal Processing, 200. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232914422712 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A single-sensor system for length estimation of unknown piles using guided waves},\njournal = {Mechanical Systems and Signal Processing},\nauthor = {Cui, Shihao and Maghoul, Pooneh},\nvolume = {200},\nyear = {2023},\nissn = {08883270},\nabstract = {<div data-language="eng" data-ev-field="abstract">The practice of reusing unknown foundations in construction projects involves using existing foundations, even though there may be limited knowledge about their geometric and physical characteristics, conditions, and stability of the soil layer and the buried structure. Accurately estimating the pile length is a critical aspect of this practice. In this study, we introduce a new pile length estimation method based on guided wave theory and utilizing only one sensor for data collection. The objective is to enhance operational flexibility in the characterization of unknown piles, in terms of data acquisition, sensor placement, and accuracy in pile length estimation. The sensor can be positioned either on the lateral side of the pile or on its top surface. The recorded responses in the frequency domain are analyzed, and their normalized magnitude is calculated. Using the dispersion relation determined by the guided wave model, we obtain the dispersion analysis diagram of the wavenumber as a function of the normalized magnitude of the recorded response. By performing periodic analysis of the dispersion analysis diagram, the pile length can be estimated. Our proposed method has been verified using both synthetic and experimental data. The results demonstrate the efficacy and accuracy of the proposed method.<br/></div> © 2023 Elsevier Ltd},\nkey = {Piles},\n%keywords = {Data acquisition;Dispersion (waves);Dispersions;Frequency domain analysis;Guided electromagnetic wave propagation;Quantum theory;Soils;},\n%note = {Dispersion relations;Guided wave model;Length estimation;Normalized magnitude;Periodic analysis;Pile foundation reuse;Pile length;Pile length estimation;Reuse;Unknown foundations;Wave modelling;},\nURL = {http://dx.doi.org/10.1016/j.ymssp.2023.110533},\n} \n\n\n
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The practice of reusing unknown foundations in construction projects involves using existing foundations, even though there may be limited knowledge about their geometric and physical characteristics, conditions, and stability of the soil layer and the buried structure. Accurately estimating the pile length is a critical aspect of this practice. In this study, we introduce a new pile length estimation method based on guided wave theory and utilizing only one sensor for data collection. The objective is to enhance operational flexibility in the characterization of unknown piles, in terms of data acquisition, sensor placement, and accuracy in pile length estimation. The sensor can be positioned either on the lateral side of the pile or on its top surface. The recorded responses in the frequency domain are analyzed, and their normalized magnitude is calculated. Using the dispersion relation determined by the guided wave model, we obtain the dispersion analysis diagram of the wavenumber as a function of the normalized magnitude of the recorded response. By performing periodic analysis of the dispersion analysis diagram, the pile length can be estimated. Our proposed method has been verified using both synthetic and experimental data. The results demonstrate the efficacy and accuracy of the proposed method.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Exposure factors and their specifications in current wind codes and standards.\n \n \n \n \n\n\n \n Yu, J.; Stathopoulos, T.; and Li, M.\n\n\n \n\n\n\n Journal of Building Engineering, 76. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ExposurePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232914400562 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Exposure factors and their specifications in current wind codes and standards},\njournal = {Journal of Building Engineering},\nauthor = {Yu, Jianhan and Stathopoulos, Ted and Li, Mingshui},\nvolume = {76},\nyear = {2023},\nissn = {23527102},\nabstract = {<div data-language="eng" data-ev-field="abstract">Wind exposure is one of the most complex issues in wind engineering and it results in the uncertainty of wind load evaluation. The specifications of exposure factor are provided in current wind load provisions to help designers determine the wind load on structures, in light of harmonizing and adopting on-going research investigations. However, there are discrepancies among various national wind provisions, as well as ambiguities in comparison with latest research results. This paper provides a comprehensive review on the studies related to exposure roughness and provides an overview of the relevant specifications in current wind provisions of [1] (USA), [2] (Canada), [3] (Australia), [4] (China), and [5] (Europe). Similarities and discrepancies of current wind load provisions are outlined in terms of exposure categories, minimum upstream fetch, and methodologies accounting for non-homogeneous exposures. Suggestions are offered to rectify some deficiencies of wind load provisions based on comparisons of wind pressures with field measurement data and wind tunnel experimental results. Moreover, recent advances in investigations regarding exposure factors have been illustrated. The research presented in the paper demonstrates a great potential to contribute to further development of wind standards and codes of practice, as far as the characterization of the upstream exposure is concerned, at the national and international level (ISO).<br/></div> © 2023 Elsevier Ltd},\nkey = {Specifications},\n%keywords = {Aerodynamic loads;Codes (symbols);Wind stress;Wind tunnels;},\n%note = {'current;Design wind loads;Exposure category;Exposure factors;Minimum upstream fetch;Roughness change;Wind codes and standards;Wind engineering;Wind load;Wind load provisions;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2023.107207},\n} \n\n\n
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Wind exposure is one of the most complex issues in wind engineering and it results in the uncertainty of wind load evaluation. The specifications of exposure factor are provided in current wind load provisions to help designers determine the wind load on structures, in light of harmonizing and adopting on-going research investigations. However, there are discrepancies among various national wind provisions, as well as ambiguities in comparison with latest research results. This paper provides a comprehensive review on the studies related to exposure roughness and provides an overview of the relevant specifications in current wind provisions of [1] (USA), [2] (Canada), [3] (Australia), [4] (China), and [5] (Europe). Similarities and discrepancies of current wind load provisions are outlined in terms of exposure categories, minimum upstream fetch, and methodologies accounting for non-homogeneous exposures. Suggestions are offered to rectify some deficiencies of wind load provisions based on comparisons of wind pressures with field measurement data and wind tunnel experimental results. Moreover, recent advances in investigations regarding exposure factors have been illustrated. The research presented in the paper demonstrates a great potential to contribute to further development of wind standards and codes of practice, as far as the characterization of the upstream exposure is concerned, at the national and international level (ISO).
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Machine learning driven post-impact damage state prediction for performance-based crashworthiness design of bridge piers.\n \n \n \n \n\n\n \n Zhou, C.; Xie, Y.; Wang, W.; and Zheng, Y.\n\n\n \n\n\n\n Engineering Structures, 292. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"MachinePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232914419047 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Machine learning driven post-impact damage state prediction for performance-based crashworthiness design of bridge piers},\njournal = {Engineering Structures},\nauthor = {Zhou, Chang and Xie, Yazhou and Wang, Wenwei and Zheng, Yuzhou},\nvolume = {292},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study applies machine learning (ML) methods to predict post-impact damage states of reinforced concrete (RC) bridge piers under vehicle collision. 251 datasets of various vehicle-bridge collision scenarios are synthesized for training and testing six supervised ML models, including K-Nearest Neighbors (KNN), Support Vector Machine (SVM), Decision Tree, Random Forest, eXtreme Gradient Boosting Trees (XGBoost), and Artificial Neural Network (ANN). Comparisons on confusion matrices indicate that SVM, Random Forest, XGBoost, and ANN possess superior and comparable classification capabilities. ML models also achieve a much higher level of accuracy when compared with existing empirical models in the literature. Furthermore, the Shapley additive explanations (SHAP) algorithm is utilized to interpret and explain the prediction process of ML models. In particular, the Shapley value of each feature captures its positive or negative contribution for the ML model to predict each damage state, where the most influential design variables include impact speed, truck mass, engine mass, and pier diameter. To facilitate the performance-based crashworthiness design of RC bridge piers, an end-to-end interactive software is devised to automatically predict impact damage states using the top three ML models against any given design scenario. Real-time interactive illustrations are also provided to elucidate the Shapley value contribution of each design parameter for the Random Forest model to reach each damage state. Finally, the final damage state is selected to have the highest likelihood of damage among the three ML model predictions.<br/></div> © 2023 Elsevier Ltd},\nkey = {Decision trees},\n%keywords = {Accidents;Adaptive boosting;Crashworthiness;Forecasting;Learning systems;Nearest neighbor search;Neural networks;Reinforced concrete;Software design;Support vector machines;Vehicle performance;},\n%note = {Damage state;Impact damages;Machine-learning;Model interpretations;Post impacts;Post-impact damage state;Shapley;Shapley additive explanation algorithm;Vehicle bridges;Vehicle-bridge collision;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.116539},\n} \n\n\n
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This study applies machine learning (ML) methods to predict post-impact damage states of reinforced concrete (RC) bridge piers under vehicle collision. 251 datasets of various vehicle-bridge collision scenarios are synthesized for training and testing six supervised ML models, including K-Nearest Neighbors (KNN), Support Vector Machine (SVM), Decision Tree, Random Forest, eXtreme Gradient Boosting Trees (XGBoost), and Artificial Neural Network (ANN). Comparisons on confusion matrices indicate that SVM, Random Forest, XGBoost, and ANN possess superior and comparable classification capabilities. ML models also achieve a much higher level of accuracy when compared with existing empirical models in the literature. Furthermore, the Shapley additive explanations (SHAP) algorithm is utilized to interpret and explain the prediction process of ML models. In particular, the Shapley value of each feature captures its positive or negative contribution for the ML model to predict each damage state, where the most influential design variables include impact speed, truck mass, engine mass, and pier diameter. To facilitate the performance-based crashworthiness design of RC bridge piers, an end-to-end interactive software is devised to automatically predict impact damage states using the top three ML models against any given design scenario. Real-time interactive illustrations are also provided to elucidate the Shapley value contribution of each design parameter for the Random Forest model to reach each damage state. Finally, the final damage state is selected to have the highest likelihood of damage among the three ML model predictions.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Prediction of the required support length at expansion bearings in the context of assessing the seismic vulnerability of existing bridges.\n \n \n \n \n\n\n \n Belleau, J.; Nollet, M.; and Khaled, A.\n\n\n \n\n\n\n Engineering Structures, 292. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"PredictionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232814388406 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Prediction of the required support length at expansion bearings in the context of assessing the seismic vulnerability of existing bridges},\njournal = {Engineering Structures},\nauthor = {Belleau, Jean-Francois and Nollet, Marie-Jose and Khaled, Amar},\nvolume = {292},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Loss of bridge deck supports is one of the major failures observed during past earthquakes. Deck collapse due to loss of support has been observed mainly on simply supported bridge structures with insufficient support length at expansion bearings. To accommodate the large displacements induced by seismic movements and to avoid bridge collapse, modern seismic standards and regulations require a minimum support length at expansion deck bearings. This paper presents the state of knowledge on the empirical support length equation and the main geometric parameters influencing the required support length at deck expansion bearings. It also presents the results of the parametric study performed on typical existing single and multi-span simply supported bridges subjected to seismic loads typical of Eastern Canada. The results allowed to identify and describe the key geometric parameters influencing the nonlinear responses of existing bridges, evaluate their relative influence in terms of displacements and ductility associated with the loss of deck supports. It also compares the current empirical equation with predicted displacements and proposes an equation more suitable for predicting expected displacements (lower than code values) in an evaluation framework for judging the seismic vulnerability of existing such as the bridge models considered in this study.<br/></div> © 2023 Elsevier Ltd},\nkey = {Seismology},\n%keywords = {Expansion;},\n%note = {Column height;Deck skew;Deck support;Existing bridge;Expansion bearings;Fundamental period;Minimum required support length;Seismic vulnerability;Simply supported bridge;Span length;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.116445},\n} \n\n\n
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Loss of bridge deck supports is one of the major failures observed during past earthquakes. Deck collapse due to loss of support has been observed mainly on simply supported bridge structures with insufficient support length at expansion bearings. To accommodate the large displacements induced by seismic movements and to avoid bridge collapse, modern seismic standards and regulations require a minimum support length at expansion deck bearings. This paper presents the state of knowledge on the empirical support length equation and the main geometric parameters influencing the required support length at deck expansion bearings. It also presents the results of the parametric study performed on typical existing single and multi-span simply supported bridges subjected to seismic loads typical of Eastern Canada. The results allowed to identify and describe the key geometric parameters influencing the nonlinear responses of existing bridges, evaluate their relative influence in terms of displacements and ductility associated with the loss of deck supports. It also compares the current empirical equation with predicted displacements and proposes an equation more suitable for predicting expected displacements (lower than code values) in an evaluation framework for judging the seismic vulnerability of existing such as the bridge models considered in this study.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Numerical convergence does not mean mathematical convergence: Examples of simple saturated steady-state groundwater models with pumping wells.\n \n \n \n \n\n\n \n Chapuis, R. P.; Duhaime, F.; Weber, S.; Marefat, V.; Zhang, L.; Blessent, D.; Bouaanani, N.; and Pelletier, D.\n\n\n \n\n\n\n Computers and Geotechnics, 162. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232814378685 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical convergence does not mean mathematical convergence: Examples of simple saturated steady-state groundwater models with pumping wells},\njournal = {Computers and Geotechnics},\nauthor = {Chapuis, Robert P. and Duhaime, Francois and Weber, Simon and Marefat, Vahid and Zhang, Lu and Blessent, Daniela and Bouaanani, Najib and Pelletier, Dominique},\nvolume = {162},\nyear = {2023},\nissn = {0266352X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Groundwater numerical studies do not include H-convergence tests, contrarily to computational fluid dynamics (CFD) studies. In regional groundwater studies with pumping wells, the grids may exceed 10<sup>6</sup> nodes. The authors examine whether H-convergence tests can help to calculate the numerical errors made by using large grids with element sizes in the 10–500 m range. First, the differences between numerical and mathematical convergences are explained. Then, a method is proposed that most users may easily implement for their groundwater studies to assess the numerical error linked to the element size, ES, and the aspect ratio, AR. A single problem, forming a simple part of a regional groundwater study, was examined and solved by using many uniform grids. The results show that most regional groundwater studies make errors in the 50–500% range, considering their usual values for ES and AR. The numerical convergence domain, NCD, is shown to be larger than the mathematical convergence domain, MCD. This means that the codes can provide a numerical solution for a large range of ES values, even for many values outside the MCD, which is a risky situation for designers who are unaware of the difference between NCD and MCD and ignore the H-convergence tests.<br/></div> © 2023 Elsevier Ltd},\nkey = {Aspect ratio},\n%keywords = {Computational fluid dynamics;Errors;Groundwater;Pumps;},\n%note = {Convergence test;Element sizes;H convergences;Mathematical convergence;Numerical convergence;Numerical errors;Pumping;Pumping well;Regional groundwater;Simple++;},\nURL = {http://dx.doi.org/10.1016/j.compgeo.2023.105615},\n} \n\n\n
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Groundwater numerical studies do not include H-convergence tests, contrarily to computational fluid dynamics (CFD) studies. In regional groundwater studies with pumping wells, the grids may exceed 106 nodes. The authors examine whether H-convergence tests can help to calculate the numerical errors made by using large grids with element sizes in the 10–500 m range. First, the differences between numerical and mathematical convergences are explained. Then, a method is proposed that most users may easily implement for their groundwater studies to assess the numerical error linked to the element size, ES, and the aspect ratio, AR. A single problem, forming a simple part of a regional groundwater study, was examined and solved by using many uniform grids. The results show that most regional groundwater studies make errors in the 50–500% range, considering their usual values for ES and AR. The numerical convergence domain, NCD, is shown to be larger than the mathematical convergence domain, MCD. This means that the codes can provide a numerical solution for a large range of ES values, even for many values outside the MCD, which is a risky situation for designers who are unaware of the difference between NCD and MCD and ignore the H-convergence tests.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Modelling the in-plane/out-of-plane interaction of brick and stone masonry structures using Applied Element Method.\n \n \n \n \n\n\n \n Khattak, N.; Derakhshan, H.; Thambiratnam, D. P.; Malomo, D.; and Perera, N. J.\n\n\n \n\n\n\n Journal of Building Engineering, 76. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ModellingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232714345658 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modelling the in-plane/out-of-plane interaction of brick and stone masonry structures using Applied Element Method},\njournal = {Journal of Building Engineering},\nauthor = {Khattak, Nouman and Derakhshan, Hossein and Thambiratnam, David P. and Malomo, Daniele and Perera, Nimal Jayantha},\nvolume = {76},\nyear = {2023},\nissn = {23527102},\nabstract = {<div data-language="eng" data-ev-field="abstract">This research focuses on the numerical modelling of the seismic behaviour of unreinforced masonry (URM) structures with interconnected in-plane (IP) loaded and out-of-plane (OOP) loaded walls. The mechanical behaviour of such wall assemblies is complex and comparatively more challenging than that of isolated components, involving the interaction between interlocked orthogonal elements subjected to different load types. IP/OOP interaction phenomena are also challenging to model numerically, and their simulation is still relatively unexplored using the Applied Element Method (AEM) – the discrete simplified micro-modelling strategy employed in this paper. To fill this knowledge gap, the AEM is herein adopted to simulate the experimentally observed seismic behaviour of two URM building prototypes, one made of clay bricks and the other of stone blocks. The AEM models developed are calibrated and validated against previous experimental data, showing a satisfactory agreement between measured and numerical responses. In addition, a parametric study was performed using pushover analysis to investigate the influence of key material properties on the overall behaviour of the clay brick masonry specimen. The study suggests that the AEM models used in this study are suitable for conducting subsequent seismic assessment of URM structures with interlocked IP/OOP loaded walls, providing validated modelling strategies that can be useful to both researchers and engineering practitioners.<br/></div> © 2023 Elsevier Ltd},\nkey = {Numerical models},\n%keywords = {Brick;Finite difference method;Numerical methods;Seismic response;Walls (structural partitions);},\n%note = {Applied element method;Brick masonry;Discrete element modeling;Discrete element models;Element method;In-plane/out-of-plane interaction;Out-of-plane;Seismic behaviour;Unreinforced masonries (URMs);Unreinforced masonry;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2023.107175},\n} \n\n\n
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This research focuses on the numerical modelling of the seismic behaviour of unreinforced masonry (URM) structures with interconnected in-plane (IP) loaded and out-of-plane (OOP) loaded walls. The mechanical behaviour of such wall assemblies is complex and comparatively more challenging than that of isolated components, involving the interaction between interlocked orthogonal elements subjected to different load types. IP/OOP interaction phenomena are also challenging to model numerically, and their simulation is still relatively unexplored using the Applied Element Method (AEM) – the discrete simplified micro-modelling strategy employed in this paper. To fill this knowledge gap, the AEM is herein adopted to simulate the experimentally observed seismic behaviour of two URM building prototypes, one made of clay bricks and the other of stone blocks. The AEM models developed are calibrated and validated against previous experimental data, showing a satisfactory agreement between measured and numerical responses. In addition, a parametric study was performed using pushover analysis to investigate the influence of key material properties on the overall behaviour of the clay brick masonry specimen. The study suggests that the AEM models used in this study are suitable for conducting subsequent seismic assessment of URM structures with interlocked IP/OOP loaded walls, providing validated modelling strategies that can be useful to both researchers and engineering practitioners.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Guided wave and genetic algorithm-based inversion for characterization of pile foundations.\n \n \n \n \n\n\n \n Cui, S.; and Maghoul, P.\n\n\n \n\n\n\n Automation in Construction, 154. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"GuidedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232614306257 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Guided wave and genetic algorithm-based inversion for characterization of pile foundations},\njournal = {Automation in Construction},\nauthor = {Cui, Shihao and Maghoul, Pooneh},\nvolume = {154},\nyear = {2023},\nissn = {09265805},\nabstract = {<div data-language="eng" data-ev-field="abstract">The characterization of geometric and mechanical properties is of great importance for the reuse of unknown foundations. In this paper, we propose a pile characterization method to non-invasively estimate the length and mechanical properties of a pile simultaneously and automatically. The forward model is established based on the guided wave theory for a cylindrical pile and a genetic algorithm-based method is proposed for the inversion process. The guided wave model is built using the spectral element method, which can generate the dispersion relation for the given physical properties. The resonance data (including the resonance frequency and the resonance number) and pile length can be related to the phase velocity, which can be derived by assuming either the displacement control or stress control boundary conditions. The loss function in the inversion method is defined by linking the dispersion relation of the forward model and the resonance analysis for those two boundary conditions. The proposed method is validated against the experimental data. By using the proposed method, pile characterization can be achieved automatically. The average accuracy of the proposed method for characterizing the pile properties (such as pile length, shear wave velocity, and longitudinal wave velocity) and the pile length is within 5% error for each variable.<br/></div> © 2023 Elsevier B.V.},\nkey = {Piles},\n%keywords = {Acoustic wave velocity;Boundary conditions;Dispersion (waves);Dispersions;Genetic algorithms;Guided electromagnetic wave propagation;Pile foundations;Quantum theory;Shear flow;Shear waves;},\n%note = {Dispersion relations;Forward modeling;Guided wave model;Inversion;Pile characterization;Pile length;Resonance data;Spectral element method;Unknown pile foundation;Wave modelling;},\nURL = {http://dx.doi.org/10.1016/j.autcon.2023.104966},\n} \n\n\n
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The characterization of geometric and mechanical properties is of great importance for the reuse of unknown foundations. In this paper, we propose a pile characterization method to non-invasively estimate the length and mechanical properties of a pile simultaneously and automatically. The forward model is established based on the guided wave theory for a cylindrical pile and a genetic algorithm-based method is proposed for the inversion process. The guided wave model is built using the spectral element method, which can generate the dispersion relation for the given physical properties. The resonance data (including the resonance frequency and the resonance number) and pile length can be related to the phase velocity, which can be derived by assuming either the displacement control or stress control boundary conditions. The loss function in the inversion method is defined by linking the dispersion relation of the forward model and the resonance analysis for those two boundary conditions. The proposed method is validated against the experimental data. By using the proposed method, pile characterization can be achieved automatically. The average accuracy of the proposed method for characterizing the pile properties (such as pile length, shear wave velocity, and longitudinal wave velocity) and the pile length is within 5% error for each variable.
© 2023 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Accuracy of CFD simulations in urban aerodynamics and microclimate: Progress and challenges.\n \n \n \n \n\n\n \n Tominaga, Y.; Wang, L. (.; Zhai, Z. (.; and Stathopoulos, T.\n\n\n \n\n\n\n Building and Environment, 243. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"AccuracyPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233614679859 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Accuracy of CFD simulations in urban aerodynamics and microclimate: Progress and challenges},\njournal = {Building and Environment},\nauthor = {Tominaga, Yoshihide and Wang, Liangzhu (Leon) and Zhai, Zhiqiang (John) and Stathopoulos, Ted},\nvolume = {243},\nyear = {2023},\nissn = {03601323},\nabstract = {<div data-language="eng" data-ev-field="abstract">This review outlines historical and recent research progress on the accuracy of computational fluid dynamics (CFD) simulations of urban aerodynamics and microclimates and clarifies future research directions and significant challenges for accuracy and reliability using CFD in this field. First, the development and accepted concepts of verification and validation (V&V) and uncertainty quantification (UQ) in general computer simulations and CFD are reviewed. Subsequently, progress made in V&V and UQ for urban aerodynamics and microclimate CFD simulations is described. The required or acceptable accuracy in this field has been discussed in several studies; however, challenges specific to applying CFD in this area should be recognized considering that the target phenomenon in urban aerodynamics and microclimates is complex. In addition, constructing a conceptual model is challenging and has many uncertainties. Furthermore, this field is characterized by significant spatial distributions of physical quantities, such as wind speed, temperature, and other scalar variables; thus, specific validation metrics and multilateral methods, including a conventional profile comparison, should be used. Therefore, the V&V and UQ processes should be implemented thoroughly, considering the characteristics of urban aerodynamics and microclimates. Discussions presented in this paper are of utmost importance and very timely in terms of simulation quality controls, especially during this new era of machine learning and artificial intelligence-based models that started being applied to urban aerodynamics and microclimate predictions.<br/></div> © 2023 The Authors},\nkey = {Aerodynamics},\n%keywords = {Artificial intelligence;Computational fluid dynamics;Uncertainty analysis;Wind;},\n%note = {Computational fluid dynamics simulations;Conceptual model;Future research directions;Historical research;Recent researches;Uncertainty;Uncertainty quantifications;Urban aerodynamic;Urban microclimate;Verification-and-validation;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2023.110723},\n} \n\n\n\n
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This review outlines historical and recent research progress on the accuracy of computational fluid dynamics (CFD) simulations of urban aerodynamics and microclimates and clarifies future research directions and significant challenges for accuracy and reliability using CFD in this field. First, the development and accepted concepts of verification and validation (V&V) and uncertainty quantification (UQ) in general computer simulations and CFD are reviewed. Subsequently, progress made in V&V and UQ for urban aerodynamics and microclimate CFD simulations is described. The required or acceptable accuracy in this field has been discussed in several studies; however, challenges specific to applying CFD in this area should be recognized considering that the target phenomenon in urban aerodynamics and microclimates is complex. In addition, constructing a conceptual model is challenging and has many uncertainties. Furthermore, this field is characterized by significant spatial distributions of physical quantities, such as wind speed, temperature, and other scalar variables; thus, specific validation metrics and multilateral methods, including a conventional profile comparison, should be used. Therefore, the V&V and UQ processes should be implemented thoroughly, considering the characteristics of urban aerodynamics and microclimates. Discussions presented in this paper are of utmost importance and very timely in terms of simulation quality controls, especially during this new era of machine learning and artificial intelligence-based models that started being applied to urban aerodynamics and microclimate predictions.
© 2023 The Authors\n
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\n \n\n \n \n \n \n \n \n Impact of Diurnal Variations on Compact Polarimetric SAR Decomposition.\n \n \n \n \n\n\n \n Muhuri, A.; Goita, K.; Magagi, R.; Wang, H.; Verma, A.; and Bhattacharya, A.\n\n\n \n\n\n\n In pages Department of Science and Technology (DST), Government of India; et al.; Indian Space Research Organization (ISRO); Machine Intelligence and Robotics Center, IIIT-B; Mphasis F1 Foundation and Cognitive Center of Excellence, IIIT-B; Satsure Inc. - , Bangalore, India, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20241715977684 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact of Diurnal Variations on Compact Polarimetric SAR Decomposition},\njournal = {2023 IEEE India Geoscience and Remote Sensing Symposium, InGARSS 2023},\nauthor = {Muhuri, Arnab and Goita, Kalifa and Magagi, Ramata and Wang, Hongquan and Verma, Abhinav and Bhattacharya, Avik},\nyear = {2023},\npages = {Department of Science and Technology (DST), Government of India; et al.; Indian Space Research Organization (ISRO); Machine Intelligence and Robotics Center, IIIT-B; Mphasis F1 Foundation and Cognitive Center of Excellence, IIIT-B; Satsure Inc. - },\naddress = {Bangalore, India},\nabstract = {<div data-language="eng" data-ev-field="abstract">In this investigation, we observed the impact of diurnal variations on the compact polarimetric decomposition powers. These observations are important for high-temporal revisit satellite missions like compact polarimetric C-band RADARSAT Constellation Mission (RCM), which are capable of same day acquisition during its ascending (ASC) and descending (DES) passes. We observed a clear sensitivity of the compact polarimetric decomposition powers over the agricultural fields to the change in the meteorological variables.<br/></div> © 2023 IEEE.},\nkey = {Polarimeters},\n%keywords = {Synthetic aperture radar;},\n%note = {Agricultural fields;C-bands;Compact polarimetries;Constellation missions;Diurnal variation;Polarimetric decomposition;Polarimetric SAR;Polarimetric SAR decomposition;Power;Satellite mission;},\nURL = {http://dx.doi.org/10.1109/InGARSS59135.2023.10490341},\n} \n\n\n
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In this investigation, we observed the impact of diurnal variations on the compact polarimetric decomposition powers. These observations are important for high-temporal revisit satellite missions like compact polarimetric C-band RADARSAT Constellation Mission (RCM), which are capable of same day acquisition during its ascending (ASC) and descending (DES) passes. We observed a clear sensitivity of the compact polarimetric decomposition powers over the agricultural fields to the change in the meteorological variables.
© 2023 IEEE.\n
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\n \n\n \n \n \n \n \n Investigation of ventilation performance in an institutional high-rise building using tracer gas technique.\n \n \n \n\n\n \n Reda, I.; Ali, E.; Qi, D.; Wang, L.; Stathopoulos, T.; and Athienitis, A.\n\n\n \n\n\n\n In Tianjin East, China, 2023. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20241515903703 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigation of ventilation performance in an institutional high-rise building using tracer gas technique},\njournal = {Healthy Buildings 2023: Asia and Pacific Rim},\nauthor = {Reda, Ibrahim and Ali, Eslam and Qi, Dahai and Wang, Liangzhu and Stathopoulos, Theodore and Athienitis, Andreas},\nyear = {2023},\naddress = {Tianjin East, China},\nabstract = {<div data-language="eng" data-ev-field="abstract">Improving ventilation in buildings has become more important than ever, particularly in this post-Covid-19 era. In this context, tracer gas techniques have been widely used to assess ventilation performance in buildings. However, this approach is limited by the well-mixed assumption that is rarely valid in practice. Therefore, this study quantified the uniformity level through normalized gas concentrations and a proposed uniformity index (Ui) using grid measurements at the breathing level. Several CO2 tracer gas tests were conducted in a mixed-ventilated classroom in Montreal, Canada, during the summer of 2022. Two test setups were built, one for the uniformity test and the other for assessing ventilation performance as a function of air change rates, source locations, and door modes. Using the modified decay method, we showed that the proposed uniformity index (Ui) decreased the error of estimated air change rates by 22%, and this paper also discussed other key parameters involved.<br/></div> © 2023 Healthy Buildings 2023: Asia and Pacific Rim. All rights reserved.},\nkey = {Carbon dioxide},\n%keywords = {Gases;Tall buildings;Ventilation;},\n%note = {Air changes;Classroom;CO2 tracer gas;High rise building;In-buildings;Tracer gas;Tracer gas techniques;Uniformity index;Ventilation performance;},\n} \n\n\n
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Improving ventilation in buildings has become more important than ever, particularly in this post-Covid-19 era. In this context, tracer gas techniques have been widely used to assess ventilation performance in buildings. However, this approach is limited by the well-mixed assumption that is rarely valid in practice. Therefore, this study quantified the uniformity level through normalized gas concentrations and a proposed uniformity index (Ui) using grid measurements at the breathing level. Several CO2 tracer gas tests were conducted in a mixed-ventilated classroom in Montreal, Canada, during the summer of 2022. Two test setups were built, one for the uniformity test and the other for assessing ventilation performance as a function of air change rates, source locations, and door modes. Using the modified decay method, we showed that the proposed uniformity index (Ui) decreased the error of estimated air change rates by 22%, and this paper also discussed other key parameters involved.
© 2023 Healthy Buildings 2023: Asia and Pacific Rim. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Failure analysis of ageing RC bridges: The cases of the Polcevera viaduct and the Caprigliola bridge.\n \n \n \n \n\n\n \n Scattarreggia, N.; Orgnoni, A.; Calvi, G.; Pinho, R.; Malomo, D.; and Moratti, M.\n\n\n \n\n\n\n In pages 3927 - 3934, Milan, Italy, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"FailurePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20241015689614 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Failure analysis of ageing RC bridges: The cases of the Polcevera viaduct and the Caprigliola bridge},\njournal = {Life-Cycle of Structures and Infrastructure Systems - Proceedings of the 8th International Symposium on Life-Cycle Civil Engineering, IALCCE 2023},\nauthor = {Scattarreggia, N. and Orgnoni, A. and Calvi, G.M. and Pinho, R. and Malomo, D. and Moratti, M.},\nyear = {2023},\npages = {3927 - 3934},\naddress = {Milan, Italy},\nabstract = {<div data-language="eng" data-ev-field="abstract">Many existing bridges now have a life of more than 50 years and the recently occurred failures underline the need for many of these structures to be assessed and, if required, retrofitted, in order to avoid catastrophic collapses. The Applied Element Method is herein used to show as advanced numerical modelling that accounts for as-built structural details, construction stages, material deterioration effects and structural modifications over time, have the potential to predict the failure mechanism and study the sensitivity of complex structural schemes to external actions. To this end, the collapse of the Polcevera viaduct in Genoa (August 2018), and of the historical multi-span arch bridge of Caprigliola (April 2020) are reproduced. Comparisons between numerical results and evidence, indicate that an accurate knowledge of the asbuilt structural details and conservation may permit to point out potential criticalities and analyse the robustness of existing bridges to avoid the premature end of their life.<br/></div> © 2023 The Author(s).},\nURL = {http://dx.doi.org/10.1201/9781003323020-482},\n} \n\n\n
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Many existing bridges now have a life of more than 50 years and the recently occurred failures underline the need for many of these structures to be assessed and, if required, retrofitted, in order to avoid catastrophic collapses. The Applied Element Method is herein used to show as advanced numerical modelling that accounts for as-built structural details, construction stages, material deterioration effects and structural modifications over time, have the potential to predict the failure mechanism and study the sensitivity of complex structural schemes to external actions. To this end, the collapse of the Polcevera viaduct in Genoa (August 2018), and of the historical multi-span arch bridge of Caprigliola (April 2020) are reproduced. Comparisons between numerical results and evidence, indicate that an accurate knowledge of the asbuilt structural details and conservation may permit to point out potential criticalities and analyse the robustness of existing bridges to avoid the premature end of their life.
© 2023 The Author(s).\n
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\n \n\n \n \n \n \n \n Monitoring the Deformation Pattern of an Instrumented Concrete Arch Dam.\n \n \n \n\n\n \n Sarkar, A.; Patra, B.; Ghodke, S.; and Bagchi, A.\n\n\n \n\n\n\n In pages 195 - 203, Stanford, CA, United states, 2023. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20240315384215 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Monitoring the Deformation Pattern of an Instrumented Concrete Arch Dam},\njournal = {Structural Health Monitoring 2023: Designing SHM for Sustainability, Maintainability, and Reliability - Proceedings of the 14th International Workshop on Structural Health Monitoring},\nauthor = {Sarkar, Avirup and Patra, Bikram and Ghodke, Sharad and Bagchi, Ashutosh},\nyear = {2023},\npages = {195 - 203},\naddress = {Stanford, CA, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Structural Health Monitoring (SHM) and prognosis could play a crucial role in the life cycle of a critical infrastructure such as a large dam. Such monitoring practices serve multiple functions and are essential components in ensuring the safety and effective maintenance of such structures. By providing insights into a structure's behaviour, structural health monitoring assists in calibrating numerical models and complements visual inspections. This process facilitates informed decision-making, aids in planning maintenance and rehabilitation schedules, and ensures the desired safety of the structure throughout its lifespan. This paper presents a case study of a double curvature large thin concrete arch dam that is currently experiencing slow irreversible upstream movement of the central dam crest. The dam is well-instrumented, with instrumentation falling into categories such as hydrometrological, geotechnical, geodetic, and seismic monitoring. The primary objective of this paper is to validate and establish a level of confidence in numerical modelling by comparing the displacement of an instrumented concrete arch dam with the with that calculated from its finite element method (FEM) model. To achieve this, a sequential thermo-mechanical analysis was performed on a 3D model of the dam foundation reservoir system. Additionally, the study utilizes a well-known statistical model called Hydrostatic-Season-Time (HST) model, based on multi-linear regression analysis, to predict the dam's future displacement using the relevant data from the sensors placed in the dam. The findings indicate a good correlation between the observed dam displacement based on instrumentation data with that calculated from the Finite Element Analysis (FEA) considering the presence of vertical joints. Moreover, the HST model proves to be a suitable choice as it closely matches the observed data and demonstrates good predictive capabilities for future dam behaviour and helps isolate the effects of different parameters on the dam displacement.<br/></div> © 2023 by DEStech Publi cations, Inc. All rights reserved},\nkey = {Decision support systems},\n%keywords = {3D modeling;Arch dams;Arches;Artificial intelligence;Concrete dams;Concretes;Decision making;Finite element method;Hydraulics;Life cycle;Numerical methods;Numerical models;Regression analysis;Reservoirs (water);Structural health monitoring;},\n%note = {Concrete arch dams;Dam displacement;Deformation pattern;Finite element method;Health prognosis;Hydrostatic-season-time model;Large dams;Structural health monitoring;Thermo-mechanical analysis;Time modeling;},\n} \n\n\n
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Structural Health Monitoring (SHM) and prognosis could play a crucial role in the life cycle of a critical infrastructure such as a large dam. Such monitoring practices serve multiple functions and are essential components in ensuring the safety and effective maintenance of such structures. By providing insights into a structure's behaviour, structural health monitoring assists in calibrating numerical models and complements visual inspections. This process facilitates informed decision-making, aids in planning maintenance and rehabilitation schedules, and ensures the desired safety of the structure throughout its lifespan. This paper presents a case study of a double curvature large thin concrete arch dam that is currently experiencing slow irreversible upstream movement of the central dam crest. The dam is well-instrumented, with instrumentation falling into categories such as hydrometrological, geotechnical, geodetic, and seismic monitoring. The primary objective of this paper is to validate and establish a level of confidence in numerical modelling by comparing the displacement of an instrumented concrete arch dam with the with that calculated from its finite element method (FEM) model. To achieve this, a sequential thermo-mechanical analysis was performed on a 3D model of the dam foundation reservoir system. Additionally, the study utilizes a well-known statistical model called Hydrostatic-Season-Time (HST) model, based on multi-linear regression analysis, to predict the dam's future displacement using the relevant data from the sensors placed in the dam. The findings indicate a good correlation between the observed dam displacement based on instrumentation data with that calculated from the Finite Element Analysis (FEA) considering the presence of vertical joints. Moreover, the HST model proves to be a suitable choice as it closely matches the observed data and demonstrates good predictive capabilities for future dam behaviour and helps isolate the effects of different parameters on the dam displacement.
© 2023 by DEStech Publi cations, Inc. All rights reserved\n
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\n \n\n \n \n \n \n \n \n Assessment of wind-driven rain (WDR) on buildings in an urban area: Comparison of different CFD frameworks.\n \n \n \n \n\n\n \n Gholamalipour, P.; Ge, H.; and Stathopoulos, T.\n\n\n \n\n\n\n In volume 2654, pages AIRMASTER; COMSOL; RAMCON; Realdania; VELUX; Woodsense - , Aalborg, Denmark, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"AssessmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20240115322800 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment of wind-driven rain (WDR) on buildings in an urban area: Comparison of different CFD frameworks},\njournal = {Journal of Physics: Conference Series},\nauthor = {Gholamalipour, P. and Ge, H. and Stathopoulos, T.},\nvolume = {2654},\nnumber = {1},\nyear = {2023},\npages = {AIRMASTER; COMSOL; RAMCON; Realdania; VELUX; Woodsense - },\nissn = {17426588},\naddress = {Aalborg, Denmark},\nabstract = {<div data-language="eng" data-ev-field="abstract">The study of Wind-Driven Rain (WDR) loading on building facades is essential to design more sustainable and climate-resilient buildings, as well as to prevent further damage to old and historical buildings. Both WDR loading on buildings and façade responses to impinging raindrops have been studied previously but results for such a multi-parameter problem are not generally conclusive. Thus, the relevant provisions of ISO semi-empirical model cannot be applied with confidence for complex building configurations, such as those in urban areas since the WDR prediction can be more than twice that of the experimental data. In this paper, the Eulerian Multiphase (ME) technique is coupled with the RANS model to simulate the WDR loading on a six-story building under steady rainfall event conditions. Wind and WDR results are compared with the available wind-tunnel and on-site field measurement results, respectively. The field measurements were carried out on a six-story mid-rise residential building, located in Vancouver, Canada. The results show that the Euler-Euler framework (RANS-EM) predicts wind and WDR in such an urban area configuration more rapidly and accurately compared to the more traditional Euler-Lagrange framework (RANS-LPT) for both stand-alone and urban area configurations.<br/></div> © Published under licence by IOP Publishing Ltd.},\nkey = {Computational fluid dynamics},\n%keywords = {Housing;Loading;Navier Stokes equations;Rain;Wind tunnels;},\n%note = {Computational fluid dynamic;Euler-Euler;Euler-euler framework;Eulerian;Eulerian multiphase model;Multiphase modeling;Residential building;Urban areas;Wind-driven rain;},\nURL = {http://dx.doi.org/10.1088/1742-6596/2654/1/012054},\n} \n\n\n
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The study of Wind-Driven Rain (WDR) loading on building facades is essential to design more sustainable and climate-resilient buildings, as well as to prevent further damage to old and historical buildings. Both WDR loading on buildings and façade responses to impinging raindrops have been studied previously but results for such a multi-parameter problem are not generally conclusive. Thus, the relevant provisions of ISO semi-empirical model cannot be applied with confidence for complex building configurations, such as those in urban areas since the WDR prediction can be more than twice that of the experimental data. In this paper, the Eulerian Multiphase (ME) technique is coupled with the RANS model to simulate the WDR loading on a six-story building under steady rainfall event conditions. Wind and WDR results are compared with the available wind-tunnel and on-site field measurement results, respectively. The field measurements were carried out on a six-story mid-rise residential building, located in Vancouver, Canada. The results show that the Euler-Euler framework (RANS-EM) predicts wind and WDR in such an urban area configuration more rapidly and accurately compared to the more traditional Euler-Lagrange framework (RANS-LPT) for both stand-alone and urban area configurations.
© Published under licence by IOP Publishing Ltd.\n
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\n \n\n \n \n \n \n \n \n Strength design optimization of sandwich composite structures under heavy dynamic loads.\n \n \n \n \n\n\n \n Osman, A.; El-Hefni, M.; and Galal, K.\n\n\n \n\n\n\n In volume 2616, Cairo, Egypt, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"StrengthPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20235115264122 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Strength design optimization of sandwich composite structures under heavy dynamic loads},\njournal = {Journal of Physics: Conference Series},\nauthor = {Osman, A. and El-Hefni, M. and Galal, K.},\nvolume = {2616},\nnumber = {1},\nyear = {2023},\nissn = {17426588},\naddress = {Cairo, Egypt},\nabstract = {<div data-language="eng" data-ev-field="abstract">Recent researches have witnessed an increased interest in the Rapid Runway Repair (RRR) methods to rehabilitate damages that may be caused by different incidents, such as: natural disasters of earthquakes, floods or man-made vandalism in civil wars. RRR is a strategic process for airport operations for civil and peace-making missions. The current RRR techniques like precast concrete slabs, metal mats, and fiberglass mats have different pros and cons. The current study numerically investigates CFRP sandwich composite structure for RRR usage, where its strength is maximized by design optimization to reach the possible carrying aircraft wheel capacity and safety factors. The proposed composite structure is advantageous of no corrosion, low erection time, high capacity-to-weight ratio, same finish of runway surface and repaired area, and can be applied over spots of unlevelled or inadequate bearing capacity of 60 cm diameter. The strength of the basic design of composite sandwich structure is first assessed to its maximum allowed carrying aircraft wheel capacity by FE modelling. Secondly, The Genetic Algorithm (GA) optimization technique is applied for maximizing the strength of the composite structure webs satisfying the minimum safety factor of five failure criteria of Tsai-Wu, Tsai-hill, Hoffman, Hashin and maximum stress. Finally, the achieved results promoted the usage of the composite structure to operate at the taxiways, runways, and theoretically, landing and take-off areas.<br/></div> © 2023 Institute of Physics Publishing. All rights reserved.},\nkey = {Concrete slabs},\n%keywords = {Aircraft;Aircraft accidents;Composite structures;Corrosion;Disasters;Dynamic loads;Genetic algorithms;Precast concrete;Safety factor;Structure (composition);Wheels;},\n%note = {'current;Aircraft wheels;Composites structures;Design optimization;Natural disasters;Recent researches;Repair methods;Runway repairs;Sandwich composites;Strength design;},\nURL = {http://dx.doi.org/10.1088/1742-6596/2616/1/012053},\n} \n\n\n
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Recent researches have witnessed an increased interest in the Rapid Runway Repair (RRR) methods to rehabilitate damages that may be caused by different incidents, such as: natural disasters of earthquakes, floods or man-made vandalism in civil wars. RRR is a strategic process for airport operations for civil and peace-making missions. The current RRR techniques like precast concrete slabs, metal mats, and fiberglass mats have different pros and cons. The current study numerically investigates CFRP sandwich composite structure for RRR usage, where its strength is maximized by design optimization to reach the possible carrying aircraft wheel capacity and safety factors. The proposed composite structure is advantageous of no corrosion, low erection time, high capacity-to-weight ratio, same finish of runway surface and repaired area, and can be applied over spots of unlevelled or inadequate bearing capacity of 60 cm diameter. The strength of the basic design of composite sandwich structure is first assessed to its maximum allowed carrying aircraft wheel capacity by FE modelling. Secondly, The Genetic Algorithm (GA) optimization technique is applied for maximizing the strength of the composite structure webs satisfying the minimum safety factor of five failure criteria of Tsai-Wu, Tsai-hill, Hoffman, Hashin and maximum stress. Finally, the achieved results promoted the usage of the composite structure to operate at the taxiways, runways, and theoretically, landing and take-off areas.
© 2023 Institute of Physics Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n Ensuring the Durability of Masonry Cavity Wall Construction in a Changing Canadian Climate: Overview of a Transformative Industry-Driven Project at McGill University.\n \n \n \n\n\n \n Saad, L.; Das, T.; Menun, A.; Costa, J. D.; El-Assaly, M.; Hosny, M.; Sparling, A.; and Malomo, D.\n\n\n \n\n\n\n In pages 176 - 184, Arlington, VA, United states, 2023. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20235115242419 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Ensuring the Durability of Masonry Cavity Wall Construction in a Changing Canadian Climate: Overview of a Transformative Industry-Driven Project at McGill University},\njournal = {ASCE Inspire 2023: Infrastructure Innovation and Adaptation for a Sustainable and Resilient World - Selected Papers from ASCE Inspire 2023},\nauthor = {Saad, Lindsay and Das, Tonushri and Menun, Alexander and Costa, Justin Di and El-Assaly, Moustafa and Hosny, Mohamed and Sparling, Adrien and Malomo, Daniele},\nyear = {2023},\npages = {176 - 184},\naddress = {Arlington, VA, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">In masonry cavity walls, the outer clay brick veneer experiences moisture/temperature-induced strains throughout its service life, while the concrete block backup, protected from temperature/moisture fluctuations by the building envelope, is prone to drying shrinkage. These long-term volume fluctuations, which may become more severe with climate change, cause differential movements between the veneer and backup and also cause distress in cavity walls and affect their durability if not properly accounted for in design. In Canada, masonry cavity wall designs rely on outdated experimental data that does not consider the interaction between mortar and masonry, while lacking substantial evidence from long-term field tests on modern structures. In this paper, preliminary results from a novel 2-step testing method for drying shrinkage on concrete masonry prisms are discussed. Future research includes moisture expansion tests on clay brick prisms, as well as mechanical tests on tie-masonry assemblies and wall-shelf angle assemblies.<br/></div> © 2023 by the American Society of Civil Engineers. All Rights Reserved.},\nkey = {Durability},\n%keywords = {Brick;Climate change;Moisture;Prisms;Shrinkage;Veneers;Walls (structural partitions);},\n%note = {%moisture;Building envelopes;Cavity wall construction;Clay brick veneer;Drying shrinkages;Induced strain;ITS Services;Masonry cavity walls;McGill University;Temperature-induced;},\n} \n\n\n
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In masonry cavity walls, the outer clay brick veneer experiences moisture/temperature-induced strains throughout its service life, while the concrete block backup, protected from temperature/moisture fluctuations by the building envelope, is prone to drying shrinkage. These long-term volume fluctuations, which may become more severe with climate change, cause differential movements between the veneer and backup and also cause distress in cavity walls and affect their durability if not properly accounted for in design. In Canada, masonry cavity wall designs rely on outdated experimental data that does not consider the interaction between mortar and masonry, while lacking substantial evidence from long-term field tests on modern structures. In this paper, preliminary results from a novel 2-step testing method for drying shrinkage on concrete masonry prisms are discussed. Future research includes moisture expansion tests on clay brick prisms, as well as mechanical tests on tie-masonry assemblies and wall-shelf angle assemblies.
© 2023 by the American Society of Civil Engineers. All Rights Reserved.\n
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\n \n\n \n \n \n \n \n \n Improvement of tailings impoundment seismic and post-seismic stability using densification and waste rock inclusions.\n \n \n \n \n\n\n \n Contreras, C. A.; Yniesta, S.; and Aubertin, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 60(11): 1629 - 1644. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ImprovementPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20234715097548 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Improvement of tailings impoundment seismic and post-seismic stability using densification and waste rock inclusions},\njournal = {Canadian Geotechnical Journal},\nauthor = {Contreras, Carlos Andres and Yniesta, Samuel and Aubertin, Michel},\nvolume = {60},\nnumber = {11},\nyear = {2023},\npages = {1629 - 1644},\nissn = {00083674},\nabstract = {<div data-language="eng" data-ev-field="abstract">Tailings impoundments are often prone to failure due to various causes related to complex loading conditions. For instance, tailings impoundments can fail during or after a seismic event, mainly because of the liquefaction of loose, cohesionless tail-ings. To improve the seismic stability of impoundments, the density of the tailings can be increased or waste rock inclusions (WRI) can be added in the impoundment. This paper presents the results of numerical analyses of the impoundments loaded with a variety of ground motions with different frequencies, scaled at two different levels of intensity representative of two mining regions of Eastern Canada. The results show that the conventional impoundments are subjected to medium to high displacements at the end of shaking; these show a high probability of rupture during the earthquake or in the post-seismic phase. Tailings densification can decrease the volume of liquefied tailings and displacements during the seismic phase but does not significantly reduce the probability of post-seismic failure. WRI can slightly reduce the volume of liquefied tailings, depending on the intensity of the motions, but the reinforcement reduces significantly the lateral displacements; impound-ments with WRI show even better performances during the post-seismic phase. The use of WRI is deemed a good approach to ensure the seismic stability of tailings impoundments and reduce the risk of seismically induced failure.<br/></div> © 2023 The Author(s).},\nkey = {Stability},\n%keywords = {Densification;Earthquakes;Liquefaction;Mining;},\n%note = {Complex loading;Densifications;Impoundment;Loading condition;Seismic event;Seismic phase;Seismic stability;Tailing densification;Waste rock inclusion;Waste rocks;},\nURL = {http://dx.doi.org/10.1139/cgj-2022-0196},\n} \n\n\n
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Tailings impoundments are often prone to failure due to various causes related to complex loading conditions. For instance, tailings impoundments can fail during or after a seismic event, mainly because of the liquefaction of loose, cohesionless tail-ings. To improve the seismic stability of impoundments, the density of the tailings can be increased or waste rock inclusions (WRI) can be added in the impoundment. This paper presents the results of numerical analyses of the impoundments loaded with a variety of ground motions with different frequencies, scaled at two different levels of intensity representative of two mining regions of Eastern Canada. The results show that the conventional impoundments are subjected to medium to high displacements at the end of shaking; these show a high probability of rupture during the earthquake or in the post-seismic phase. Tailings densification can decrease the volume of liquefied tailings and displacements during the seismic phase but does not significantly reduce the probability of post-seismic failure. WRI can slightly reduce the volume of liquefied tailings, depending on the intensity of the motions, but the reinforcement reduces significantly the lateral displacements; impound-ments with WRI show even better performances during the post-seismic phase. The use of WRI is deemed a good approach to ensure the seismic stability of tailings impoundments and reduce the risk of seismically induced failure.
© 2023 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Stress Analysis of Concrete Gravity Dams Using Time Domain Spectral Finite Element Method Under the Action of Seismic Ground Motion.\n \n \n \n \n\n\n \n Sarkar, A.; and Bagchi, A.\n\n\n \n\n\n\n In volume 433 LNCE, pages 623 - 631, Milan, Italy, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"StressPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20234314967422 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Stress Analysis of Concrete Gravity Dams Using Time Domain Spectral Finite Element Method Under the Action of Seismic Ground Motion},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Sarkar, Avirup and Bagchi, Ashutosh},\nvolume = {433 LNCE},\nyear = {2023},\npages = {623 - 631},\nissn = {23662557},\naddress = {Milan, Italy},\nabstract = {<div data-language="eng" data-ev-field="abstract">Structural health monitoring (SHM) is an integral part of modern-day engineering as it helps to take decisions on the state of the structure and suggest possible retrofitting measures. Dams are an essential component of civil infrastructure industry and failure of such large structures under seismic events could lead to huge scale devastations with enormous economic and life loss. Thus, structural health monitoring of dams is an absolute necessity. In most cases, Finite element method (FEM) is the analysis tool adopted for solving problems of stress analysis of dams under the action of seismic ground motions. Alternate analysis tools have been developed in recent years. Some of these alternative techniques fall under the broad category of "Spectral Finite element methods". Time domain spectral finite element method (TDSFEM) is one such method which has been used in the recent years in solving problems of dynamics for fluids and solids. However, not much literature is available which demonstrates the use of TDSFEM in dynamic analysis of large civil engineering structures like dams. This paper illustrates the application of TDSFEM to the problem of dynamic analysis of concrete gravity under the action of seismic ground motions. The dynamic stress analysis helps in identifying the state of the structure and possible locations of failure.<br/></div> © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Structural health monitoring},\n%keywords = {Concrete dams;Concretes;Failure (mechanical);Finite element method;Gravity dams;Motion analysis;Seismology;Stress analysis;Time domain analysis;},\n%note = {Analysis tools;Civil infrastructures;Concrete gravity dams;Dynamics analysis;Integral part;Seismic ground motions;Spectral finite element method;Stresses analysis;Time domain;Time domain SFEM;},\nURL = {http://dx.doi.org/10.1007/978-3-031-39117-0_63},\n} \n\n\n
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Structural health monitoring (SHM) is an integral part of modern-day engineering as it helps to take decisions on the state of the structure and suggest possible retrofitting measures. Dams are an essential component of civil infrastructure industry and failure of such large structures under seismic events could lead to huge scale devastations with enormous economic and life loss. Thus, structural health monitoring of dams is an absolute necessity. In most cases, Finite element method (FEM) is the analysis tool adopted for solving problems of stress analysis of dams under the action of seismic ground motions. Alternate analysis tools have been developed in recent years. Some of these alternative techniques fall under the broad category of \"Spectral Finite element methods\". Time domain spectral finite element method (TDSFEM) is one such method which has been used in the recent years in solving problems of dynamics for fluids and solids. However, not much literature is available which demonstrates the use of TDSFEM in dynamic analysis of large civil engineering structures like dams. This paper illustrates the application of TDSFEM to the problem of dynamic analysis of concrete gravity under the action of seismic ground motions. The dynamic stress analysis helps in identifying the state of the structure and possible locations of failure.
© 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Post-fire Damage Assessment of Buildings at the Wildland Urban Interface.\n \n \n \n \n\n\n \n Abo-El-Ezz, A.; AlShaikh, F.; Farzam, A.; Cote, M.; and Nollet, M.\n\n\n \n\n\n\n In volume 363 LNCE, pages 893 - 902, Whistler, BC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"Post-firePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20233914789452 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Post-fire Damage Assessment of Buildings at the Wildland Urban Interface},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Abo-El-Ezz, Ahmad and AlShaikh, Faten and Farzam, Azarm and Cote, Marc-Olivier and Nollet, Marie-Jose},\nvolume = {363 LNCE},\nyear = {2023},\npages = {893 - 902},\nissn = {23662557},\naddress = {Whistler, BC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Wildfires are considered one of the costliest natural hazards in Canada. Significant fire events that occurred had threatened and destroyed buildings at the Wildland Urban Interface (WUI). Standard methods for wildfire risk assessment include hazards’ analysis, inventory of exposed buildings and vulnerability analysis that correlates expected losses to fire intensity measure and distance from forest boundary. On the other hand, there is limited research on buildings’ vulnerability assessment to wildfire impacts and scarcity of models that correlate the likely response and expected loss of different types of buildings to varying levels of fire intensity. This article presents a methodology for geospatial data collection of post-fire buildings damage at Canadian WUI communities with the objective of developing community-scale empirical building fire vulnerability models that can be integrated in community-scale wildfire risk assessment tools. In this study, the empirical fire vulnerability model is developed in terms of the loss rate defined by the proportion of buildings burned as a percentage of the total exposed buildings as a function of the distance from forest edge and the corresponding fire intensity. The methodology consists of consecutive steps including geospatial digitization of burned and survived buildings from post-fire open-source satellite imagery; characterization of building types and occupancy based on open-source municipal databases; estimation of distances to burned forest boundary based on burn scar satellite imagery and the measurement of distance increments to buildings. The buildings data are then combined to develop an empirical fire vulnerability model. The methodology is demonstrated by a case study WUI community in Canada that was exposed to a damaging wildfire event.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Developing countries},\n%keywords = {Buildings;Damage detection;Fires;Forestry;Hazards;Risk assessment;Satellite imagery;},\n%note = {Damage assessments;Expected loss;Fire damages;Fire intensity;Open-source;Post-fire;Post-fire damage assessment;Vulnerability models;Wildfire risks;Wildland urban interface;},\nURL = {http://dx.doi.org/10.1007/978-3-031-34593-7_55},\n} \n\n\n
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Wildfires are considered one of the costliest natural hazards in Canada. Significant fire events that occurred had threatened and destroyed buildings at the Wildland Urban Interface (WUI). Standard methods for wildfire risk assessment include hazards’ analysis, inventory of exposed buildings and vulnerability analysis that correlates expected losses to fire intensity measure and distance from forest boundary. On the other hand, there is limited research on buildings’ vulnerability assessment to wildfire impacts and scarcity of models that correlate the likely response and expected loss of different types of buildings to varying levels of fire intensity. This article presents a methodology for geospatial data collection of post-fire buildings damage at Canadian WUI communities with the objective of developing community-scale empirical building fire vulnerability models that can be integrated in community-scale wildfire risk assessment tools. In this study, the empirical fire vulnerability model is developed in terms of the loss rate defined by the proportion of buildings burned as a percentage of the total exposed buildings as a function of the distance from forest edge and the corresponding fire intensity. The methodology consists of consecutive steps including geospatial digitization of burned and survived buildings from post-fire open-source satellite imagery; characterization of building types and occupancy based on open-source municipal databases; estimation of distances to burned forest boundary based on burn scar satellite imagery and the measurement of distance increments to buildings. The buildings data are then combined to develop an empirical fire vulnerability model. The methodology is demonstrated by a case study WUI community in Canada that was exposed to a damaging wildfire event.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n A Review of Structural Behavior and Composite Action Between the Steel Beams and Concrete Slabs.\n \n \n \n \n\n\n \n Aghdam, P. P.; Parent, S.; and Roy, N.\n\n\n \n\n\n\n In volume 348 LNCE, pages 497 - 517, Whistler, BC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20234014827679 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Review of Structural Behavior and Composite Action Between the Steel Beams and Concrete Slabs},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Aghdam, P. Panjehbashi and Parent, S. and Roy, N.},\nvolume = {348 LNCE},\nyear = {2023},\npages = {497 - 517},\nissn = {23662557},\naddress = {Whistler, BC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The steel–concrete composite construction is known as one of the fast, economical, and eco-friendly methods due to its advantages in terms of saving in weight of steel and concrete. Composite constructions are extensively used in multi-story buildings and medium-span bridge decks. The longitudinal shear transfer between the steel beam and reinforced concrete slab is achieved through various mechanical devices called shear connectors. The mechanical properties of the shear connector, including the strength and stiffness, play a vital role in the composite action of the steel–concrete beam. The stud-type connectors are widely used in composite construction and are subjected to flexural and axial forces when resisting the interface forces by means of dowel action. In a composite slab, the degree of shear connection, the shear strength, and the stiffness of an individual stud can be determined experimentally by conducting push-out tests. Previous studies have conducted flexural tests to investigate the composite interaction in steel–concrete composite beam elements. This paper reviews different types of push-out and flexural tests proposed in the literature to evaluate the characteristics of composite slabs. The paper also provides different approaches to investigate the interaction of composite elements. This research contributes to the field by providing a comprehensive discussion of the advantages and challenges of the experimental methods to perform the push-out and flexural tests and how these two types of tests can cooperatively promote the understanding of the behavior of composite slabs.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Concrete slabs},\n%keywords = {Composite beams and girders;Concrete beams and girders;Concrete testing;Reinforced concrete;Steel beams and girders;Stiffness;Studs (fasteners);Studs (structural members);},\n%note = {Composite action;Composite construction;Composite interactions;Composite slab;Composite steel-concrete beams;Flexural behavior;Flexural tests;Push-out tests;Shear connector;Shear studs;},\nURL = {http://dx.doi.org/10.1007/978-3-031-34159-5_34},\n} \n\n\n
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The steel–concrete composite construction is known as one of the fast, economical, and eco-friendly methods due to its advantages in terms of saving in weight of steel and concrete. Composite constructions are extensively used in multi-story buildings and medium-span bridge decks. The longitudinal shear transfer between the steel beam and reinforced concrete slab is achieved through various mechanical devices called shear connectors. The mechanical properties of the shear connector, including the strength and stiffness, play a vital role in the composite action of the steel–concrete beam. The stud-type connectors are widely used in composite construction and are subjected to flexural and axial forces when resisting the interface forces by means of dowel action. In a composite slab, the degree of shear connection, the shear strength, and the stiffness of an individual stud can be determined experimentally by conducting push-out tests. Previous studies have conducted flexural tests to investigate the composite interaction in steel–concrete composite beam elements. This paper reviews different types of push-out and flexural tests proposed in the literature to evaluate the characteristics of composite slabs. The paper also provides different approaches to investigate the interaction of composite elements. This research contributes to the field by providing a comprehensive discussion of the advantages and challenges of the experimental methods to perform the push-out and flexural tests and how these two types of tests can cooperatively promote the understanding of the behavior of composite slabs.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Solar Buildings and Structural Wind Resilience in Wind Codes and Standards.\n \n \n \n \n\n\n \n Alrawashdeh, H.; and Stathopoulos, T.\n\n\n \n\n\n\n In pages 1341 - 1350, Montreal, QC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"SolarPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20234014827220 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Solar Buildings and Structural Wind Resilience in Wind Codes and Standards},\njournal = {Environmental Science and Engineering},\nauthor = {Alrawashdeh, Hatem and Stathopoulos, Theodore},\nyear = {2023},\npages = {1341 - 1350},\nissn = {18635520},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper discusses thoroughly the regulatory design provisions of the current wind standards and codes of practice and their comprehensive scope for structural wind resilience of various photovoltaic systems, namely Building Attached Photovoltaics (BAPVs) on roofs or walls and Building-Integrated Photovoltaics (BIPVs) into building envelope or components. Energy resilience and structural resilience, which are always at the forefront of general building resilience, are closely linked. Structural resilience is concerned with the performance, serviceability, and functionality of any photovoltaic system fitted into the building or providing the building with energy. Ensuring structural resilience would significantly enhance the energy self-efficiency of the building; and thereafter, the energy resilience of the building. By surveying the set of provisions available in the current wind codes and standards, the paper stresses the need for substantial research progress to be made toward the evaluation of wind loads on PV modules at different installations.<br/></div> © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.},\nkey = {Buildings},\n%keywords = {Solar panels;Solar power generation;},\n%note = {'current;Code of practice;Design provisions;Energy;Photovoltaic systems;Photovoltaics;Renewable energies;Resilience;Standards and codes;Wind codes and standards;},\nURL = {http://dx.doi.org/10.1007/978-981-19-9822-5_139},\n} \n\n\n
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This paper discusses thoroughly the regulatory design provisions of the current wind standards and codes of practice and their comprehensive scope for structural wind resilience of various photovoltaic systems, namely Building Attached Photovoltaics (BAPVs) on roofs or walls and Building-Integrated Photovoltaics (BIPVs) into building envelope or components. Energy resilience and structural resilience, which are always at the forefront of general building resilience, are closely linked. Structural resilience is concerned with the performance, serviceability, and functionality of any photovoltaic system fitted into the building or providing the building with energy. Ensuring structural resilience would significantly enhance the energy self-efficiency of the building; and thereafter, the energy resilience of the building. By surveying the set of provisions available in the current wind codes and standards, the paper stresses the need for substantial research progress to be made toward the evaluation of wind loads on PV modules at different installations.
© 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.\n
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\n \n\n \n \n \n \n \n \n Assessment of Pullout Stiffness of Grillage Foundations in Lattice Tower Structures.\n \n \n \n \n\n\n \n Bahari, M.; Langlois, S.; and Prudhomme, S.\n\n\n \n\n\n\n In volume 348 LNCE, pages 1073 - 1090, Whistler, BC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"AssessmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20234014827546 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment of Pullout Stiffness of Grillage Foundations in Lattice Tower Structures},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Bahari, Majid and Langlois, Sebastien and Prudhomme, Simon},\nvolume = {348 LNCE},\nyear = {2023},\npages = {1073 - 1090},\nissn = {23662557},\naddress = {Whistler, BC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Traditionally and based on the common design codes, the foundation of lattice tower structures has been considered as a fixed base, regarding no soil–structure interaction or foundation flexibility. As the lattice tower structures are subjected to complex dynamic loads and also specific nonlinear behavior, the foundation performance and consequently overall tower response under static and dynamic loads are dependent on the stiffness and damping characteristics of the foundation. To predict the foundation rigidity in different directions in numerical modeling methods, the analytical equations have been suggested in the literature in the form of impedance functions. However, the relations are generally for concrete foundations and more importantly do not include the pullout stiffness. In this study, experimental pullout tests of grillage foundations, performed by Hydro-Québec, in three different soil types including sand, clay and crushed gravel have been investigated to calculate and predict the pullout stiffness of soil-foundation system in each soil type. Exploring theoretical expressions in calculating pullout resistance of grillage foundations and tests results, the closer results to experimental values were presented. Developing a numerical code, a curve fitting has been performed for all tests of the same soil type to reproduce the normalized force–displacement curves, representing elastic, elastoplastic and plastic behaviors of the soil-foundation system under tension forces. The results are normalized load–displacement curves, suggesting three normalized stiffnesses and two normalized displacements for clay (cohesive soils), sand and crushed gravel (non-cohesive soils) which could be implemented in prediction of the foundation pullout rigidity with an arbitrary geometry and depth of embedment. The normalized curves are compared to available analogous results in the literature.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Stiffness},\n%keywords = {Codes (symbols);Curve fitting;Dynamic loads;Forecasting;Foundations;Gravel;Numerical methods;Piles;Rigidity;Soils;Towers;},\n%note = {Force-displacement curves;Foundation systems;Grillage foundation;Lattice tower structure;Lattice towers;Pullout stiffness;Soil foundation;Soil types;Three-linear force–displacement curve;Tower structures;},\nURL = {http://dx.doi.org/10.1007/978-3-031-34159-5_73},\n} \n\n\n
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Traditionally and based on the common design codes, the foundation of lattice tower structures has been considered as a fixed base, regarding no soil–structure interaction or foundation flexibility. As the lattice tower structures are subjected to complex dynamic loads and also specific nonlinear behavior, the foundation performance and consequently overall tower response under static and dynamic loads are dependent on the stiffness and damping characteristics of the foundation. To predict the foundation rigidity in different directions in numerical modeling methods, the analytical equations have been suggested in the literature in the form of impedance functions. However, the relations are generally for concrete foundations and more importantly do not include the pullout stiffness. In this study, experimental pullout tests of grillage foundations, performed by Hydro-Québec, in three different soil types including sand, clay and crushed gravel have been investigated to calculate and predict the pullout stiffness of soil-foundation system in each soil type. Exploring theoretical expressions in calculating pullout resistance of grillage foundations and tests results, the closer results to experimental values were presented. Developing a numerical code, a curve fitting has been performed for all tests of the same soil type to reproduce the normalized force–displacement curves, representing elastic, elastoplastic and plastic behaviors of the soil-foundation system under tension forces. The results are normalized load–displacement curves, suggesting three normalized stiffnesses and two normalized displacements for clay (cohesive soils), sand and crushed gravel (non-cohesive soils) which could be implemented in prediction of the foundation pullout rigidity with an arbitrary geometry and depth of embedment. The normalized curves are compared to available analogous results in the literature.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Lateral Behavior of a 12-story Modular Building Structure with Vertically Unconstrained Inter-modular Connections, Including a Grouted Slip-resistant Mechanism.\n \n \n \n \n\n\n \n Bazarchi, E.; Davaran, A.; Lamarche, C.; Roy, N.; and Parent, S.\n\n\n \n\n\n\n In volume 348 LNCE, pages 577 - 590, Whistler, BC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"LateralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20234014827684 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Lateral Behavior of a 12-story Modular Building Structure with Vertically Unconstrained Inter-modular Connections, Including a Grouted Slip-resistant Mechanism},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Bazarchi, Ehsan and Davaran, Ali and Lamarche, Charles-Philippe and Roy, Nathalie and Parent, Serge},\nvolume = {348 LNCE},\nyear = {2023},\npages = {577 - 590},\nissn = {23662557},\naddress = {Whistler, BC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">In most industrialized countries, new strategies are being sought to increase the efficiency of manufacturing and construction methods to mitigate the effect of increased labor costs, and the shortage of human resources, on the overall cost of construction projects. Modular building structures have proved to be promising in this regard by enhancing the speed of construction and minimizing on-site activities. In modular building systems, prefabricated volumetric units called "modules" are constructed off-site in a controlled environment and transported to the construction site, where they are assembled using inter-modular connections. Bolted inter-modular connections are generally used to avoid welding on-site. However, because of construction tolerances inherent to bolted connections, the latter are prone to serviceability issues such as slip between the connected elements. For extreme load cases such as earthquakes or wind, the accumulation of inter-story slip displacements/drift can lead to the global instability of the modular building. The inter-modular connections’ slip resistance is also crucial because most code provisions do not tolerate any slip under service loads. This study incorporates a grouted slip-resistant mechanism to a basic inter-modular connection concept to prevent slip. Sophisticated nonlinear-static pushover analyses were performed to investigate the lateral behavior of a prototype 12-story modular building, including possible slip effects. The numerical finite element results showed that the proposed grouted mechanism could efficiently control slip displacement in the proposed connection. The lateral displacements of the building were reduced by replacing the basic connections with enhanced connections in the upper six stories.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Grouting},\n%keywords = {Buildings;Concrete construction;Modular construction;Mortar;Wages;},\n%note = {Building structure;Construction method;Industrialized countries;Manufacturing methods;Modular building structure;Modular buildings;Modular connection;Modulars;Slip displacements;Slip-resistant mechanism;},\nURL = {http://dx.doi.org/10.1007/978-3-031-34159-5_39},\n} \n\n\n
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In most industrialized countries, new strategies are being sought to increase the efficiency of manufacturing and construction methods to mitigate the effect of increased labor costs, and the shortage of human resources, on the overall cost of construction projects. Modular building structures have proved to be promising in this regard by enhancing the speed of construction and minimizing on-site activities. In modular building systems, prefabricated volumetric units called \"modules\" are constructed off-site in a controlled environment and transported to the construction site, where they are assembled using inter-modular connections. Bolted inter-modular connections are generally used to avoid welding on-site. However, because of construction tolerances inherent to bolted connections, the latter are prone to serviceability issues such as slip between the connected elements. For extreme load cases such as earthquakes or wind, the accumulation of inter-story slip displacements/drift can lead to the global instability of the modular building. The inter-modular connections’ slip resistance is also crucial because most code provisions do not tolerate any slip under service loads. This study incorporates a grouted slip-resistant mechanism to a basic inter-modular connection concept to prevent slip. Sophisticated nonlinear-static pushover analyses were performed to investigate the lateral behavior of a prototype 12-story modular building, including possible slip effects. The numerical finite element results showed that the proposed grouted mechanism could efficiently control slip displacement in the proposed connection. The lateral displacements of the building were reduced by replacing the basic connections with enhanced connections in the upper six stories.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n DYNAMIC PERFORMANCE OF A FULL-SCALE WOOD FRAME SUBJECTED TO CYCLIC LOAD TESTING.\n \n \n \n \n\n\n \n Bouffard, F.; and Proulx, J.\n\n\n \n\n\n\n In volume 4, pages 2030 - 2039, Oslo, Norway, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"DYNAMICPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20233814753611 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {DYNAMIC PERFORMANCE OF A FULL-SCALE WOOD FRAME SUBJECTED TO CYCLIC LOAD TESTING},\njournal = {13th World Conference on Timber Engineering, WCTE 2023},\nauthor = {Bouffard, Felix and Proulx, Jean},\nvolume = {4},\nyear = {2023},\npages = {2030 - 2039},\naddress = {Oslo, Norway},\nabstract = {<div data-language="eng" data-ev-field="abstract">The strength-to-weight ratio of wood structural elements makes them very attractive on an engineering design point of view. This is one of the reasons why wooden buildings are known to perform well during seismic events of medium and high intensities. However, ductility and over strength factors, making it possible to design structures having the capacity to resist a seismic event by its inelastic properties, are not well characterized and leads to a local over design of assemblies and critical wood sections. The primary objective of this study is to characterize the cyclic behaviour of a diagonally braced full-scale frame. This study focuses on capacity design to have the dowel assemblies as the main dissipator of energy. A full-size frame specimen was subjected to cyclic loading. The frame was built with glulam timber elements joined together with hidden steel plates and fastened with dowels. The cyclic loading results demonstrated a global ductile behaviour, a good redistribution of the internal efforts in the assemblies, a reduction of the secant stiffness after the yielding point, increment of the dissipation of energy, great over-strength, and minor damage in the timber elements. This supports the use of this type of frame with a capacity design focused on a ductile behaviour.<br/></div> © WCTE 2023.All rights reserved},\nkey = {Timber},\n%keywords = {Cyclic loads;Seismic design;Seismology;Wooden buildings;},\n%note = {Capacity design;Cyclic loading;Force resisting systems;Full-scale;Glulam;Seismic behaviour;Seismic event;Seismic force resisting system;Seismic forces;Wood frame;},\nURL = {http://dx.doi.org/10.52202/069179-0269},\n} \n\n\n
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\n
The strength-to-weight ratio of wood structural elements makes them very attractive on an engineering design point of view. This is one of the reasons why wooden buildings are known to perform well during seismic events of medium and high intensities. However, ductility and over strength factors, making it possible to design structures having the capacity to resist a seismic event by its inelastic properties, are not well characterized and leads to a local over design of assemblies and critical wood sections. The primary objective of this study is to characterize the cyclic behaviour of a diagonally braced full-scale frame. This study focuses on capacity design to have the dowel assemblies as the main dissipator of energy. A full-size frame specimen was subjected to cyclic loading. The frame was built with glulam timber elements joined together with hidden steel plates and fastened with dowels. The cyclic loading results demonstrated a global ductile behaviour, a good redistribution of the internal efforts in the assemblies, a reduction of the secant stiffness after the yielding point, increment of the dissipation of energy, great over-strength, and minor damage in the timber elements. This supports the use of this type of frame with a capacity design focused on a ductile behaviour.
© WCTE 2023.All rights reserved\n
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\n \n\n \n \n \n \n \n \n Evaluation of Concrete Constitutive Models for Finite Element Simulation of Dam Shear Keys.\n \n \n \n \n\n\n \n Freitas, M.; Ben Ftima, M.; Leger, P.; and Bouaanani, N.\n\n\n \n\n\n\n In volume 348 LNCE, pages 413 - 430, Whistler, BC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"EvaluationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20234014827672 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evaluation of Concrete Constitutive Models for Finite Element Simulation of Dam Shear Keys},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Freitas, Mario and Ben Ftima, Mahdi and Leger, Pierre and Bouaanani, Najib},\nvolume = {348 LNCE},\nyear = {2023},\npages = {413 - 430},\nissn = {23662557},\naddress = {Whistler, BC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Three-dimensional performance-based structural assessment of concrete dams subjected to floods and earthquakes requires an accurate estimation of inter-monolith-relative displacements. These displacements could be limited by the presence of shear keys, used in many concrete gravity and arch dams’ contraction joints as interlocking mechanisms for transferring shear forces between adjacent monoliths. The key shear strength that could be mobilized is a function of several parameters that control the load–displacement response and failure mechanisms: friction, cohesion, key geometry, confinement pressure, etc. The influence of these parameters is not well understood. This paper first presents an evaluation of five concrete constitutive models implemented in three commercially available general-purpose finite element software packages for numerically simulating the behavior of plain concrete shear keys (ABAQUS, LS-Dyna, ATENA). First, a brief review of each model is presented, including their theoretical formulations, required inputs, advantages, and limitations. Experimental data on shearing of trapezoidal shear keys, available from the literature, are used to evaluate the performance of each constitutive model. The study is then extended to different shear key geometries. It is shown that the load–displacement responses, ultimate shear capacities, failure mechanisms, and post-peak softening behavior can be accurately predicted by a well-calibrated LS-Dyna Concrete Surface Cap Model. It is also shown that the geometry and the boundary conditions, with either unrestrained or restrained lateral shear dilatancy, can greatly influence the failure mechanisms and consequently the shear key load-bearing capacity and residual strength.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Geometry},\n%keywords = {ABAQUS;Arch dams;Arches;Concrete dams;Concretes;Constitutive models;Failure (mechanical);Finite element method;},\n%note = {Accurate estimation;Concrete constitutive models;Dam shear key;Failure mechanism;Finite elements simulation;Load-displacement response;Performance based;Relative displacement;Shear key;Structural assessments;},\nURL = {http://dx.doi.org/10.1007/978-3-031-34159-5_28},\n} \n\n\n
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Three-dimensional performance-based structural assessment of concrete dams subjected to floods and earthquakes requires an accurate estimation of inter-monolith-relative displacements. These displacements could be limited by the presence of shear keys, used in many concrete gravity and arch dams’ contraction joints as interlocking mechanisms for transferring shear forces between adjacent monoliths. The key shear strength that could be mobilized is a function of several parameters that control the load–displacement response and failure mechanisms: friction, cohesion, key geometry, confinement pressure, etc. The influence of these parameters is not well understood. This paper first presents an evaluation of five concrete constitutive models implemented in three commercially available general-purpose finite element software packages for numerically simulating the behavior of plain concrete shear keys (ABAQUS, LS-Dyna, ATENA). First, a brief review of each model is presented, including their theoretical formulations, required inputs, advantages, and limitations. Experimental data on shearing of trapezoidal shear keys, available from the literature, are used to evaluate the performance of each constitutive model. The study is then extended to different shear key geometries. It is shown that the load–displacement responses, ultimate shear capacities, failure mechanisms, and post-peak softening behavior can be accurately predicted by a well-calibrated LS-Dyna Concrete Surface Cap Model. It is also shown that the geometry and the boundary conditions, with either unrestrained or restrained lateral shear dilatancy, can greatly influence the failure mechanisms and consequently the shear key load-bearing capacity and residual strength.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Wind-Driven Rain (WDR) Distribution on Buildings: Influential Parameters.\n \n \n \n \n\n\n \n Gholamalipour, P.; Ge, H.; and Stathopoulos, T.\n\n\n \n\n\n\n In pages 273 - 281, Montreal, QC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"Wind-DrivenPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20234014827249 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind-Driven Rain (WDR) Distribution on Buildings: Influential Parameters},\njournal = {Environmental Science and Engineering},\nauthor = {Gholamalipour, Payam and Ge, Hua and Stathopoulos, Ted},\nyear = {2023},\npages = {273 - 281},\nissn = {18635520},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Wind-driven rain (WDR) causes negative consequences such as degradation of surface material, frost damage, salt efflorescence, structural cracking, interior damage, etc. WDR has been studied extensively through experimental measurements, numerical simulations, and semi-empirical methods. The previous WDR studies, can be categorized into two areas: the study of WDR impinged on buildings, and the investigation of surface reactions to the impinging raindrops. The present study synthesizes previous studies’ results with regard to the characteristics of WDR impinged on façade, such as the main wetting pattern on various building configurations, i.e., stand-alone (isolated), street canyon, building-array, urban area. A comprehensive summary of the effect of meteorological and geometrical parameters concerning WDR impinged on buildings is provided. It is identified that wind speed and direction, as well as building configuration, are found to be the most significant meteorological and geometric parameters, respectively.<br/></div> © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.},\nkey = {Surface reactions},\n%keywords = {Atmospheric boundary layer;Buildings;Computational fluid dynamics;Drying;Geometry;Numerical methods;Rain;Wetting;Wind;},\n%note = {Atmospheric boundary layer;Building aerodynamics;Building configuration;Computational fluid dynamic;Frost damage;Salt efflorescence;Surface materials;Wind engineering;Wind-driven rain;},\nURL = {http://dx.doi.org/10.1007/978-981-19-9822-5_30},\n} \n\n\n
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Wind-driven rain (WDR) causes negative consequences such as degradation of surface material, frost damage, salt efflorescence, structural cracking, interior damage, etc. WDR has been studied extensively through experimental measurements, numerical simulations, and semi-empirical methods. The previous WDR studies, can be categorized into two areas: the study of WDR impinged on buildings, and the investigation of surface reactions to the impinging raindrops. The present study synthesizes previous studies’ results with regard to the characteristics of WDR impinged on façade, such as the main wetting pattern on various building configurations, i.e., stand-alone (isolated), street canyon, building-array, urban area. A comprehensive summary of the effect of meteorological and geometrical parameters concerning WDR impinged on buildings is provided. It is identified that wind speed and direction, as well as building configuration, are found to be the most significant meteorological and geometric parameters, respectively.
© 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.\n
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\n \n\n \n \n \n \n \n \n Experimental Investigation of the Diaphragm Behavior of a New Deep Steel Deck Profile with Flange and Web Stiffeners.\n \n \n \n \n\n\n \n Ilkhechi, M. K.; Davaran, A.; Lamarche, C. -.; and Tremblay, R.\n\n\n \n\n\n\n In volume 348 LNCE, pages 947 - 958, Whistler, BC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20234014827537 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental Investigation of the Diaphragm Behavior of a New Deep Steel Deck Profile with Flange and Web Stiffeners},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Ilkhechi, Milad Keshvari and Davaran, Ali and Lamarche, Charles -P. and Tremblay, Robert},\nvolume = {348 LNCE},\nyear = {2023},\npages = {947 - 958},\nissn = {23662557},\naddress = {Whistler, BC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">In North America, steel deck diaphragms are commonly used in low-rise commercial and industrial buildings as a roofing system to resist gravity loads. They are also used to transfer the in-plane shear forces generated by wind and seismic loads to the lateral force-resisting systems. A new 100 mm deep steel deck profile with longitudinal web and flange stiffeners, the MS100 profile, is being developed by Metal Sartigan Inc., Polytechnique Montreal, and Université de Sherbrooke. This type of deep stiffened steel deck is produced for the first time in Canada. This article describes a series of five large-scale monotonic quasi-static diaphragm test programs that was conducted on the new deep deck profile. Power-actuated fasteners were used for structural connections where self-drilling screws were used for side-lap connections. In each test, the diaphragm shear strength and stiffness were measured together with the global ductility. The measured strength and stiffness values are compared to AISI S310-20 and AISI S310-16 predictions. The results showed that MS100 steel deck diaphragms can exhibit sufficient strength for typical building applications. In the tests, it was observed that the shear strength was controlled by local buckling of the deck webs at the exterior support when closely spaced connections were used. For these specimens, the AISI S310-20 calculation method could predict reasonably well the shear strength, compared to AISI S310-16, even if the method does not account for the presence of web stiffeners. As expected, the measured diaphragm shear stiffness of such a deep deck profile is relatively low. The ductility of the tested diaphragms as measured under monotonic quasi-static loading varies from 6.95 to 11.2.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Flanges},\n%keywords = {Diaphragms;Ductility;Office buildings;Stiffness;},\n%note = {Deep deck;Deep steel deck;Diaphragm behavior;Experimental investigations;Flange and web stiffener;Shear stiffness;Shears strength;Steel decks;Strength and stiffness;Web-stiffeners;},\nURL = {http://dx.doi.org/10.1007/978-3-031-34159-5_65},\n} \n\n\n
\n
\n\n\n
\n
In North America, steel deck diaphragms are commonly used in low-rise commercial and industrial buildings as a roofing system to resist gravity loads. They are also used to transfer the in-plane shear forces generated by wind and seismic loads to the lateral force-resisting systems. A new 100 mm deep steel deck profile with longitudinal web and flange stiffeners, the MS100 profile, is being developed by Metal Sartigan Inc., Polytechnique Montreal, and Université de Sherbrooke. This type of deep stiffened steel deck is produced for the first time in Canada. This article describes a series of five large-scale monotonic quasi-static diaphragm test programs that was conducted on the new deep deck profile. Power-actuated fasteners were used for structural connections where self-drilling screws were used for side-lap connections. In each test, the diaphragm shear strength and stiffness were measured together with the global ductility. The measured strength and stiffness values are compared to AISI S310-20 and AISI S310-16 predictions. The results showed that MS100 steel deck diaphragms can exhibit sufficient strength for typical building applications. In the tests, it was observed that the shear strength was controlled by local buckling of the deck webs at the exterior support when closely spaced connections were used. For these specimens, the AISI S310-20 calculation method could predict reasonably well the shear strength, compared to AISI S310-16, even if the method does not account for the presence of web stiffeners. As expected, the measured diaphragm shear stiffness of such a deep deck profile is relatively low. The ductility of the tested diaphragms as measured under monotonic quasi-static loading varies from 6.95 to 11.2.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Seismic Behaviour of Steel Wide-Flange Columns in Ductile Moment-Resisting Frames Considering Base Plate Flexibility.\n \n \n \n \n\n\n \n Moammer, O.; Imanpour, A.; and Tremblay, R.\n\n\n \n\n\n\n In volume 348 LNCE, pages 243 - 259, Whistler, BC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20234014827660 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Behaviour of Steel Wide-Flange Columns in Ductile Moment-Resisting Frames Considering Base Plate Flexibility},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Moammer, Omid and Imanpour, Ali and Tremblay, Robert},\nvolume = {348 LNCE},\nyear = {2023},\npages = {243 - 259},\nissn = {23662557},\naddress = {Whistler, BC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper aims to examine the seismic behaviour of steel wide-flange columns in steel ductile moment-resisting frames considering the deformations of the base plate and anchor rods. A prototype MRF is first designed in accordance with the Canadian steel design standard (CSA S16-19) seismic provisions. A continuum finite element model of the interior first-storey column isolated from the prototype frame is then developed together with the base footing and connection. The flexibility of the adjoining beams at the top end of the column is also considered in the numerical model. The capability of the model components in reproducing the cyclic response of the wide-flange column and its base conditions are then calibrated against available experimental test data. Special attention is placed on the cyclic response of the anchor rods and base plate. The seismic response of the columns of the prototype frame is finally examined using the corroborating finite element model under realistic seismic demands obtained from the two-dimensional concentrated plasticity-based numerical model of the frame subjected to representative earthquake ground motions. The results from the finite element analyses confirm that base flexibility can influence the inelastic cyclic response and the stability of first-storey MRF columns. Furthermore, the proposed numerical modelling technique can be used in future studies to properly simulate the inelastic seismic response of the column base plate, anchor rods, and footing for the purpose of MRF response evaluation.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Numerical models},\n%keywords = {Earthquakes;Finite element method;Flanges;Plates (structural components);Seismic design;Seismic response;Structural frames;},\n%note = {Base flexibility;Base plates;Cyclic response;Ductile moments;Flange columns;Moment resisting frames;Non-linear modelling;Seismic behaviour;Steel moment resisting frame;Wide-flange column;},\nURL = {http://dx.doi.org/10.1007/978-3-031-34159-5_17},\n} \n\n\n
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\n
This paper aims to examine the seismic behaviour of steel wide-flange columns in steel ductile moment-resisting frames considering the deformations of the base plate and anchor rods. A prototype MRF is first designed in accordance with the Canadian steel design standard (CSA S16-19) seismic provisions. A continuum finite element model of the interior first-storey column isolated from the prototype frame is then developed together with the base footing and connection. The flexibility of the adjoining beams at the top end of the column is also considered in the numerical model. The capability of the model components in reproducing the cyclic response of the wide-flange column and its base conditions are then calibrated against available experimental test data. Special attention is placed on the cyclic response of the anchor rods and base plate. The seismic response of the columns of the prototype frame is finally examined using the corroborating finite element model under realistic seismic demands obtained from the two-dimensional concentrated plasticity-based numerical model of the frame subjected to representative earthquake ground motions. The results from the finite element analyses confirm that base flexibility can influence the inelastic cyclic response and the stability of first-storey MRF columns. Furthermore, the proposed numerical modelling technique can be used in future studies to properly simulate the inelastic seismic response of the column base plate, anchor rods, and footing for the purpose of MRF response evaluation.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Design of Controllable Modular Multi-inlet Semi-transparent PV/T System with Applications to Buildings and Infrastructure.\n \n \n \n \n\n\n \n Valinejadshoubi, M.; Athienitis, A.; and Bagchi, A.\n\n\n \n\n\n\n In pages 1257 - 1265, Montreal, QC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"DesignPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20234014827212 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design of Controllable Modular Multi-inlet Semi-transparent PV/T System with Applications to Buildings and Infrastructure},\njournal = {Environmental Science and Engineering},\nauthor = {Valinejadshoubi, Masoud and Athienitis, Andreas and Bagchi, Ashutosh},\nyear = {2023},\npages = {1257 - 1265},\nissn = {18635520},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">This research aimed to design a controllable multi-inlet Photovoltaic/thermal (PV/T) system with dampers to control system operation. For this purpose, five openings and two dampers were employed on a module of PV/T system. The developed steady-state numerical two-dimensional model of the proposed system is applied to evaluate three study models, one one-inlet system, and two two-inlet systems, on the 15th of February, in Montreal to assess thermal generation and temperature. The results show that one-inlet system could have further thermal generation for high air velocity. The two-inlet systems can perform better than the one-inlet system in low air velocity, but the thermal generation difference decreases with increasing air velocity.<br/></div> © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.},\nkey = {Air},\n%keywords = {Architectural design;Solar panels;Structural design;},\n%note = {Air velocities;BIPV/T;Energy generations;Modulars;Net-zero building;Photovoltaic/thermal systems;Semi-transparent photovoltaic;Systems operation;Thermal generation;Two inlets;},\nURL = {http://dx.doi.org/10.1007/978-981-19-9822-5_131},\n} \n\n\n
\n
\n\n\n
\n
This research aimed to design a controllable multi-inlet Photovoltaic/thermal (PV/T) system with dampers to control system operation. For this purpose, five openings and two dampers were employed on a module of PV/T system. The developed steady-state numerical two-dimensional model of the proposed system is applied to evaluate three study models, one one-inlet system, and two two-inlet systems, on the 15th of February, in Montreal to assess thermal generation and temperature. The results show that one-inlet system could have further thermal generation for high air velocity. The two-inlet systems can perform better than the one-inlet system in low air velocity, but the thermal generation difference decreases with increasing air velocity.
© 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.\n
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\n \n\n \n \n \n \n \n \n Impact of Uncertainty Estimation of Hydrological Models on Spectral Downscaling of GRACE-Based Terrestrial and Groundwater Storage Variation Estimations.\n \n \n \n \n\n\n \n Eshagh, M.; Fatolazadeh, F.; and Goita, K.\n\n\n \n\n\n\n Remote Sensing, 15(16). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233514641549 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact of Uncertainty Estimation of Hydrological Models on Spectral Downscaling of GRACE-Based Terrestrial and Groundwater Storage Variation Estimations},\njournal = {Remote Sensing},\nauthor = {Eshagh, Mehdi and Fatolazadeh, Farzam and Goita, Kalifa},\nvolume = {15},\nnumber = {16},\nyear = {2023},\nissn = {20724292},\nabstract = {<div data-language="eng" data-ev-field="abstract">Accurately estimating hydrological parameters is crucial for comprehending global water resources and climate dynamics. This study addresses the challenge of quantifying uncertainties in the global land data assimilation system (GLDAS) model and enhancing the accuracy of downscaled gravity recovery and climate experiment (GRACE) data. Although the GLDAS models provide valuable information on hydrological parameters, they lack uncertainty quantification. To enhance the resolution of GRACE data, a spectral downscaling approach can be employed, leveraging uncertainty estimates. In this study, we propose a novel approach, referred to as method 2, which incorporates parameter magnitudes to estimate uncertainties in the GLDAS model. The proposed method is applied to downscale GRACE data over Alberta, with a specific focus on December 2003. The groundwater storage extracted from the downscaled terrestrial water storage (TWS) are compared with measurements from piezometric wells, demonstrating substantial improvements in accuracy. In approximately 80% of the wells, the root mean square (RMS) and standard deviation (STD) were improved to less than 5 mm. These results underscore the potential of the proposed approach to enhance downscaled GRACE data and improve hydrological models.<br/></div> © 2023 by the authors.},\nkey = {Groundwater},\n%keywords = {Climate models;Digital storage;Groundwater resources;Hydrology;Parameter estimation;Uncertainty analysis;},\n%note = {Down-scaling;Downscaling groundwater storage;Gravity modeling;Gravity recovery and climate experiment datum;Gravity recovery and climate experiment gravity model;Gravity recovery and climate experiments;Groundwater storage;Spectral combination;Terrestrial water storage;Uncertainty estimation;},\nURL = {http://dx.doi.org/10.3390/rs15163967},\n} \n\n\n
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\n
Accurately estimating hydrological parameters is crucial for comprehending global water resources and climate dynamics. This study addresses the challenge of quantifying uncertainties in the global land data assimilation system (GLDAS) model and enhancing the accuracy of downscaled gravity recovery and climate experiment (GRACE) data. Although the GLDAS models provide valuable information on hydrological parameters, they lack uncertainty quantification. To enhance the resolution of GRACE data, a spectral downscaling approach can be employed, leveraging uncertainty estimates. In this study, we propose a novel approach, referred to as method 2, which incorporates parameter magnitudes to estimate uncertainties in the GLDAS model. The proposed method is applied to downscale GRACE data over Alberta, with a specific focus on December 2003. The groundwater storage extracted from the downscaled terrestrial water storage (TWS) are compared with measurements from piezometric wells, demonstrating substantial improvements in accuracy. In approximately 80% of the wells, the root mean square (RMS) and standard deviation (STD) were improved to less than 5 mm. These results underscore the potential of the proposed approach to enhance downscaled GRACE data and improve hydrological models.
© 2023 by the authors.\n
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\n \n\n \n \n \n \n \n \n Geodesic Distance Based Scattering Power Decomposition for Compact Polarimetric SAR Data.\n \n \n \n \n\n\n \n Muhuri, A.; Goita, K.; Magagi, R.; and Wang, H.\n\n\n \n\n\n\n IEEE Transactions on Geoscience and Remote Sensing, 61. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"GeodesicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233414601955 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Geodesic Distance Based Scattering Power Decomposition for Compact Polarimetric SAR Data},\njournal = {IEEE Transactions on Geoscience and Remote Sensing},\nauthor = {Muhuri, Arnab and Goita, Kalifa and Magagi, Ramata and Wang, Hongquan},\nvolume = {61},\nyear = {2023},\nissn = {01962892},\nabstract = {<div data-language="eng" data-ev-field="abstract">We propose a geodesic distance (GD)-based scattering power decomposition for compact polarimetric (CP) synthetic aperture radar (SAR) data acquired over agricultural landscapes. The proposed technique decomposes the polarized portion of the total backscattered power in proportion to the normalized target similarity measures. The measures are derived from the GDs, which are computed between the Kennaugh matrices of observed and canonical targets (dihedral or trihedral). We observed a pseudo-power component in the double bounce power, which can be attributed to target irregularities. To compensate for the pseudo-power component, we proposed a compensation strategy by utilizing the CP radar vegetation index (CpRVI). The compensation factor assists in readjusting the polarized power components. The proposed approach was tested with real (RADARSAT Constellation Mission: RCM) and simulated (RADARSAT-2: RS2) hybrid CP data over agricultural sites in Canada. The effectiveness of the approach was demonstrated by comparing the decomposed powers with a recently proposed CP scattering power decomposition.<br/></div> © 1980-2012 IEEE.},\nkey = {Vegetation},\n%keywords = {Agriculture;Geodesy;Mapping;Matrix algebra;Polarimeters;Space-based radar;Synthetic aperture radar;},\n%note = {Canonical target;Compact polarimetric synthetic aperture radar decomposition;Constellation missions;Geodesic distances;Index;Matrix decomposition;Polarimetric synthetic aperture radars;RADARSAT constellation mission;Radarsat-2;Vegetation mapping;},\nURL = {http://dx.doi.org/10.1109/TGRS.2023.3304710},\n} \n\n\n
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We propose a geodesic distance (GD)-based scattering power decomposition for compact polarimetric (CP) synthetic aperture radar (SAR) data acquired over agricultural landscapes. The proposed technique decomposes the polarized portion of the total backscattered power in proportion to the normalized target similarity measures. The measures are derived from the GDs, which are computed between the Kennaugh matrices of observed and canonical targets (dihedral or trihedral). We observed a pseudo-power component in the double bounce power, which can be attributed to target irregularities. To compensate for the pseudo-power component, we proposed a compensation strategy by utilizing the CP radar vegetation index (CpRVI). The compensation factor assists in readjusting the polarized power components. The proposed approach was tested with real (RADARSAT Constellation Mission: RCM) and simulated (RADARSAT-2: RS2) hybrid CP data over agricultural sites in Canada. The effectiveness of the approach was demonstrated by comparing the decomposed powers with a recently proposed CP scattering power decomposition.
© 1980-2012 IEEE.\n
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\n \n\n \n \n \n \n \n \n End-to-end processing of passive thermography sequences from outdoor concrete infrastructure inspection.\n \n \n \n \n\n\n \n Pozzer, S.; Ebrahimi, S.; Refai, A. E.; Lopez, F.; and Maldague, X.\n\n\n \n\n\n\n In volume 12536, pages Infrared Cameras, Inc.; The Society of Photo-Optical Instrumentation Engineers (SPIE) - , Orlando, FL, United states, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"End-to-endPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20233314534259 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {End-to-end processing of passive thermography sequences from outdoor concrete infrastructure inspection},\njournal = {Proceedings of SPIE - The International Society for Optical Engineering},\nauthor = {Pozzer, Sandra and Ebrahimi, Samira and Refai, Ahmed El and Lopez, Fernando and Maldague, Xavier},\nvolume = {12536},\nyear = {2023},\npages = {Infrared Cameras, Inc.; The Society of Photo-Optical Instrumentation Engineers (SPIE) - },\nissn = {0277786X},\naddress = {Orlando, FL, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study developed an end-to-end procedure to overcome common issues faced during the analysis of passive infrared thermography (IRT) image sequences from outdoor concrete infrastructures. The processing pipeline includes the automatic pre-processing of raw thermograms, data cleaning and organization, image adjustment, and sequential image registration. One image registration method was implemented, and the results were evaluated using the Euclidean distance metric. Furthermore, the resulting sequences were processed using state-of-art signal processing techniques to increase the signature contrast of subsurface defects. The results from outdoor infrared thermography surveys over two academic samples are presented, where one image per minute was taken for 24 hours on slabs and columns representative structures. By addressing the difficulties encountered during the analysis of passive IRT sequences, our contribution can broaden the spectrum of the application of IRT as an nondestructive testing (NDT) method for the condition assessment of concrete infrastructure.<br/></div> © 2023 SPIE.},\nkey = {Thermography (imaging)},\n%keywords = {Cleaning;Concrete testing;Concretes;Data handling;Image registration;Nondestructive examination;Pipeline processing systems;},\n%note = {Concrete;Data cleaning;Data organization;End to end;Image sequence;Images registration;Nondestructive tests;Passive infrared;Pre-processing;Signal-processing;},\nURL = {http://dx.doi.org/10.1117/12.2664058},\n} \n\n\n
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This study developed an end-to-end procedure to overcome common issues faced during the analysis of passive infrared thermography (IRT) image sequences from outdoor concrete infrastructures. The processing pipeline includes the automatic pre-processing of raw thermograms, data cleaning and organization, image adjustment, and sequential image registration. One image registration method was implemented, and the results were evaluated using the Euclidean distance metric. Furthermore, the resulting sequences were processed using state-of-art signal processing techniques to increase the signature contrast of subsurface defects. The results from outdoor infrared thermography surveys over two academic samples are presented, where one image per minute was taken for 24 hours on slabs and columns representative structures. By addressing the difficulties encountered during the analysis of passive IRT sequences, our contribution can broaden the spectrum of the application of IRT as an nondestructive testing (NDT) method for the condition assessment of concrete infrastructure.
© 2023 SPIE.\n
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\n \n\n \n \n \n \n \n \n Calibration of the PM4Sand model for hard-rock mine tailings based on laboratory and field testing results.\n \n \n \n \n\n\n \n Contreras, C. A.; Yniesta, S.; Jahanbakhshzadeh, A.; and Aubertin, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 60(7): 966 - 977. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"CalibrationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233114465605 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Calibration of the PM4Sand model for hard-rock mine tailings based on laboratory and field testing results},\njournal = {Canadian Geotechnical Journal},\nauthor = {Contreras, Carlos Andres and Yniesta, Samuel and Jahanbakhshzadeh, Abtin and Aubertin, Michel},\nvolume = {60},\nnumber = {7},\nyear = {2023},\npages = {966 - 977},\nissn = {00083674},\nabstract = {<div data-language="eng" data-ev-field="abstract">A comprehensive campaign of laboratory and field tests has been conducted to characterize the behaviour of tailings from a hard-rock mine. Cyclic triaxial, direct simple shear, and triaxial simple shear tests have shown that the contractive tailings are susceptible to liquefaction and that their behaviour is similar to loose sand despite their higher fines’ content. To model the behaviour of tailings’ impoundments in dynamic simulations, the PM4Sand constitutive model is calibrated based on the dataset presented here. Some of the model parameters are defined based on consolidation and compression tests, while the critical state line (CSL) is defined based on the results of monotonic triaxial and direct simple shear tests. The CSL is lower for tailings than for most natural sands, which is consistent with previous studies. The calibrated model can reproduce reasonably well the monotonic behaviour and provides an excellent fit of the cyclic strength curves measured in the lab at different confining pressures and density index. The results presented in this paper indicate that the PM4Sand model can be used to simulate the cyclic behaviour of low-plasticity, hard-rock tailings. The proposed procedure also provides general guidelines regarding model calibration for other types of tailings.<br/></div> © 2023, Canadian Science Publishing. All rights reserved.},\nkey = {Compression testing},\n%keywords = {Critical current density (superconductivity);Liquefaction;Tailings;},\n%note = {Critical state lines;Critical-state;Direct simple shears;Field testing;Hard rock mines;Laboratory test;Laboratory testing;Mine tailings;Pm4sand;Simple shear test;},\nURL = {http://dx.doi.org/10.1139/cgj-2021-0257},\n} \n\n\n
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A comprehensive campaign of laboratory and field tests has been conducted to characterize the behaviour of tailings from a hard-rock mine. Cyclic triaxial, direct simple shear, and triaxial simple shear tests have shown that the contractive tailings are susceptible to liquefaction and that their behaviour is similar to loose sand despite their higher fines’ content. To model the behaviour of tailings’ impoundments in dynamic simulations, the PM4Sand constitutive model is calibrated based on the dataset presented here. Some of the model parameters are defined based on consolidation and compression tests, while the critical state line (CSL) is defined based on the results of monotonic triaxial and direct simple shear tests. The CSL is lower for tailings than for most natural sands, which is consistent with previous studies. The calibrated model can reproduce reasonably well the monotonic behaviour and provides an excellent fit of the cyclic strength curves measured in the lab at different confining pressures and density index. The results presented in this paper indicate that the PM4Sand model can be used to simulate the cyclic behaviour of low-plasticity, hard-rock tailings. The proposed procedure also provides general guidelines regarding model calibration for other types of tailings.
© 2023, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Seismic assessment of URM pier spandrel systems via efficient computational modeling strategies.\n \n \n \n \n\n\n \n Pulatsu, B.; Funari, M. F.; Malomo, D.; Gonen, S.; and Parisi, F.\n\n\n \n\n\n\n Bulletin of Earthquake Engineering, 21(12): 5573 - 5596. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233114470072 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic assessment of URM pier spandrel systems via efficient computational modeling strategies},\njournal = {Bulletin of Earthquake Engineering},\nauthor = {Pulatsu, Bora and Funari, Marco Francesco and Malomo, Daniele and Gonen, Semih and Parisi, Fulvio},\nvolume = {21},\nnumber = {12},\nyear = {2023},\npages = {5573 - 5596},\nissn = {1570761X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Predicting the seismic behavior of unreinforced masonry (URM) structural systems is a complex task, given various inherent sources of uncertainty associated with material properties, geometry, and boundary conditions. As the selection of computational strategies is a trade-off between prediction accuracy and computational cost, it is often challenging to find a consensus. To this end, this study presents three computational modeling strategies that can be used in the seismic analysis of URM structures. The first two approaches utilize the discrete element method (DEM) and are based on pre-defined macro-block mechanisms, whereas the third approach makes use of the computational thrust line analysis (CTLA). Such methods provide accurate predictions on the in-plane lateral load-carrying capacity of URM pier-spandrel structures with a reasonable computational cost and fewer input parameters, making them efficient compared to detailed numerical models. The results are found to be in good agreement with the experimental data on two full-scale pier-spandrel systems with either timber lintel or shallow arch above a central opening. This study also provides a detailed comparison of the applied methods and suggests multi-level use of proposed modeling strategies for better informed decision-making, starting from the most simplified method (CTLA) towards the advanced solutions as more information is collected.<br/></div> © 2023, The Author(s), under exclusive licence to Springer Nature B.V.},\nkey = {Finite difference method},\n%keywords = {Arch bridges;Arches;Computation theory;Decision making;Economic and social effects;Forecasting;Masonry materials;Numerical methods;Piers;Seismology;},\n%note = {Computational modelling;Computational strategy;Discrete element models;Experimental validations;Line analysis;Modelling strategies;Thrust line;Thrust line analyse;Unreinforced masonries (URMs);Unreinforced masonry structures;},\nURL = {http://dx.doi.org/10.1007/s10518-023-01744-5},\n} \n\n\n
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Predicting the seismic behavior of unreinforced masonry (URM) structural systems is a complex task, given various inherent sources of uncertainty associated with material properties, geometry, and boundary conditions. As the selection of computational strategies is a trade-off between prediction accuracy and computational cost, it is often challenging to find a consensus. To this end, this study presents three computational modeling strategies that can be used in the seismic analysis of URM structures. The first two approaches utilize the discrete element method (DEM) and are based on pre-defined macro-block mechanisms, whereas the third approach makes use of the computational thrust line analysis (CTLA). Such methods provide accurate predictions on the in-plane lateral load-carrying capacity of URM pier-spandrel structures with a reasonable computational cost and fewer input parameters, making them efficient compared to detailed numerical models. The results are found to be in good agreement with the experimental data on two full-scale pier-spandrel systems with either timber lintel or shallow arch above a central opening. This study also provides a detailed comparison of the applied methods and suggests multi-level use of proposed modeling strategies for better informed decision-making, starting from the most simplified method (CTLA) towards the advanced solutions as more information is collected.
© 2023, The Author(s), under exclusive licence to Springer Nature B.V.\n
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\n \n\n \n \n \n \n \n \n Performance-based wind and earthquake design framework for tall steel buildings with ductile detailing.\n \n \n \n \n\n\n \n Athanasiou, A.; Tirca, L.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 240. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"Performance-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20232914416758 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance-based wind and earthquake design framework for tall steel buildings with ductile detailing},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Athanasiou, Anastasia and Tirca, Lucia and Stathopoulos, Ted},\nvolume = {240},\nyear = {2023},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">According to the Canadian building code, wind design relies on prescriptive static methods, which lead to a conservative design. In consequence, in moderate seismic regions where both winds and earthquakes are critical, the size of ductile members resulting from seismic design, and especially those of bottom floors, may not accommodate the elastic wind demand and larger member sizes are required. In general, this is the case of rectangular buildings, where in the direction perpendicular to the largest building dimension, the base shear due to elastic wind demand is critical, while in the orthogonal direction the seismic demand governs. Hence, in one direction, the allowable base shear increases above the seismic demand, which results in reduced energy dissipation and amplification of torsion. To mitigate the incoherence in the current building code, a refined code-based multi-hazard design approach, targeting performance of tall steel buildings in Eastern Canada, is proposed. Thus, accounting for the building's overstrength and allowing limited controlled inelasticity under high-intensity wind, a wind-related reduction factor R<inf>W</inf> is proposed to reduce the design wind load. The method is implemented for the design of two identical 15-storey steel braced frame buildings, but of different occupancy, hospital and office, respectively. Nonlinear response history analyses are performed to verify the member sections of steel braced frames, while the parameters investigated are the interstorey drift, residual interstorey drift and floor acceleration. Then, seismic and wind incremental dynamic analyses provide insight into the multi-hazard dynamic response of buildings subjected to ground motions and winds of increasing intensity. The fragility concept is used to quantify the performance of studied buildings designed with R<inf>W</inf> = 2 versus the building designed with R<inf>W</inf> = 1. Comfort criteria, as well as, the drift acceptance criteria, commonly considered in research and practice, are used to verify the effectiveness of the proposed method. The nonlinear response of the studied buildings at the design level and beyond shows that using R<inf>W</inf> = 2 for wind design does not change the response at design level, but slightly decreases the collapse capacity within the acceptable range.<br/></div> © 2023 Elsevier Ltd},\nkey = {Earthquakes},\n%keywords = {Architectural design;Energy dissipation;Floors;Hazards;Nonlinear analysis;Seismic design;Seismic response;Structural frames;},\n%note = {Aerodynamic data;Base shear;Design levels;Earthquake design;Multihazard designs;Performance based;Seismic demands;Steel braced frames;Steel buildings;Wind design;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2023.105492},\n} \n\n\n
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According to the Canadian building code, wind design relies on prescriptive static methods, which lead to a conservative design. In consequence, in moderate seismic regions where both winds and earthquakes are critical, the size of ductile members resulting from seismic design, and especially those of bottom floors, may not accommodate the elastic wind demand and larger member sizes are required. In general, this is the case of rectangular buildings, where in the direction perpendicular to the largest building dimension, the base shear due to elastic wind demand is critical, while in the orthogonal direction the seismic demand governs. Hence, in one direction, the allowable base shear increases above the seismic demand, which results in reduced energy dissipation and amplification of torsion. To mitigate the incoherence in the current building code, a refined code-based multi-hazard design approach, targeting performance of tall steel buildings in Eastern Canada, is proposed. Thus, accounting for the building's overstrength and allowing limited controlled inelasticity under high-intensity wind, a wind-related reduction factor RW is proposed to reduce the design wind load. The method is implemented for the design of two identical 15-storey steel braced frame buildings, but of different occupancy, hospital and office, respectively. Nonlinear response history analyses are performed to verify the member sections of steel braced frames, while the parameters investigated are the interstorey drift, residual interstorey drift and floor acceleration. Then, seismic and wind incremental dynamic analyses provide insight into the multi-hazard dynamic response of buildings subjected to ground motions and winds of increasing intensity. The fragility concept is used to quantify the performance of studied buildings designed with RW = 2 versus the building designed with RW = 1. Comfort criteria, as well as, the drift acceptance criteria, commonly considered in research and practice, are used to verify the effectiveness of the proposed method. The nonlinear response of the studied buildings at the design level and beyond shows that using RW = 2 for wind design does not change the response at design level, but slightly decreases the collapse capacity within the acceptable range.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Wind loading of rooftop PV panels cover plate: A codification-oriented study.\n \n \n \n \n\n\n \n Alrawashdeh, H.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 240. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"WindPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232714341999 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind loading of rooftop PV panels cover plate: A codification-oriented study},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Alrawashdeh, Hatem and Stathopoulos, Ted},\nvolume = {240},\nyear = {2023},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">The design of rooftop solar panels for wind loads requires provisions to be sufficiently comprehensive to reflect the wind effects on PV module/panel cover plate, individual PV panels, PV panels arrays, and their supporting systems. Unfortunately, the focus of the literature studies and the provisions of the current wind codes and standards is on the net pressure coefficients that can be used in the design of PV panel supporting systems. Particularly, current wind codes and standards of practice do not provide design pressure coefficients for elements on cover plates of rooftop PV panels. In this contribution and along with the intention to examine the characteristics of the wind-induced surface pressures, this paper investigates the surface wind loads of a rooftop solar array of eight panels. The tests were carried out in open-terrain exposure at a geometric test scale of 1:50. In preliminary experiments, additional tests were conducted on two more geometric scales, namely 1:100 and 1:200, to assess the effects of the geometric test scale on the experimental pressure coefficients that would be deemed as design loading for the credibility and integrity of the wind tunnel setup established for codification-oriented studies. The experimental results illustrate that applying the design net pressure coefficients of the current wind codes and standards for the design of PV cover plates will lead to significantly undervalued wind loads. On the other hand, it is found that the external pressure coefficients assigned by ASCE/SEI for gable roofs of low-rise buildings with a slope between 7° and 20° are adaptable for the design of elements on cover plates of rooftop PV panels.<br/></div> © 2023 Elsevier Ltd},\nkey = {Wind tunnels},\n%keywords = {Aerodynamic loads;Geometry;Solar panels;Structural dynamics;Wind stress;},\n%note = {'current;Codes and standards;Cover plate;Design coefficient;PV panel;Rooftop PV panel;Surface wind pressure;Surface winds;Wind load;Wind pressures;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2023.105489},\n} \n\n\n
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The design of rooftop solar panels for wind loads requires provisions to be sufficiently comprehensive to reflect the wind effects on PV module/panel cover plate, individual PV panels, PV panels arrays, and their supporting systems. Unfortunately, the focus of the literature studies and the provisions of the current wind codes and standards is on the net pressure coefficients that can be used in the design of PV panel supporting systems. Particularly, current wind codes and standards of practice do not provide design pressure coefficients for elements on cover plates of rooftop PV panels. In this contribution and along with the intention to examine the characteristics of the wind-induced surface pressures, this paper investigates the surface wind loads of a rooftop solar array of eight panels. The tests were carried out in open-terrain exposure at a geometric test scale of 1:50. In preliminary experiments, additional tests were conducted on two more geometric scales, namely 1:100 and 1:200, to assess the effects of the geometric test scale on the experimental pressure coefficients that would be deemed as design loading for the credibility and integrity of the wind tunnel setup established for codification-oriented studies. The experimental results illustrate that applying the design net pressure coefficients of the current wind codes and standards for the design of PV cover plates will lead to significantly undervalued wind loads. On the other hand, it is found that the external pressure coefficients assigned by ASCE/SEI for gable roofs of low-rise buildings with a slope between 7° and 20° are adaptable for the design of elements on cover plates of rooftop PV panels.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Influence of 1350 and 6201 aluminum alloys on the fatigue life of overhead conductors – A finite element analysis.\n \n \n \n \n\n\n \n Rocha, P.; Langlois, S.; Lalonde, S.; Araujo, J.; and Castro, F.\n\n\n \n\n\n\n Tribology International, 186. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"InfluencePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232614324313 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Influence of 1350 and 6201 aluminum alloys on the fatigue life of overhead conductors – A finite element analysis},\njournal = {Tribology International},\nauthor = {Rocha, P.H.C. and Langlois, S. and Lalonde, S. and Araujo, J.A. and Castro, F.C.},\nvolume = {186},\nyear = {2023},\nissn = {0301679X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Wires made of 6201-T81 aluminum alloy are generally more resistant to fatigue than AA1350-H19 (pure aluminum) wires. However, the fatigue lives of conductors composed of AA6201-T81 wires (All Aluminum Alloy Conductors) are lower than those of conductors made of AA1350-H19 wires reinforced with steel (Aluminum Conductor Steel Reinforced). From literature, the underlying reason for this behavior remains unclear. In this study, finite element simulations are carried out to understand the influence of the aluminum alloy type on the conductor life. To support the discussion, experimental data available in the literature for AAAC 900 MCM and ACSR Tern conductors, as well as for the aluminum wires made of alloys 6201-T81 and 1350-H19, are utilized. The study provides valuable insights into the intricate relationship between the tensile strength and fretting fatigue resistance of the 6201-T81 aluminum alloy and their impact on the fatigue resistance of 6201-based conductors. Specifically, it reveals that while the increased tensile strength of this alloy enables the critical wires in the conductor to withstand higher stress levels, its resistance to fretting fatigue falls short in compensating the damaging effects of such elevated stresses. As a consequence, greater fatigue damage occurs in these wires, ultimately leading to a reduction in the overall durability of the conductor. The findings of this study bring a new understanding to the fatigue problem of 6201-based conductors and have the potential to change the design guidelines for transmission lines using these cables.<br/></div> © 2023},\nkey = {Wire},\n%keywords = {Aluminum alloys;Fatigue of materials;Finite element method;Overhead lines;Reinforcement;Tensile strength;},\n%note = {Aluminum alloy conductors;Aluminum conductor steel reinforced;Aluminum wires;Fatigue-resistance;Finite element analyse;Fretting fatigues;Life predictions;Overhead conductors;Pure aluminium;Pure aluminum;},\nURL = {http://dx.doi.org/10.1016/j.triboint.2023.108661},\n} \n\n\n
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Wires made of 6201-T81 aluminum alloy are generally more resistant to fatigue than AA1350-H19 (pure aluminum) wires. However, the fatigue lives of conductors composed of AA6201-T81 wires (All Aluminum Alloy Conductors) are lower than those of conductors made of AA1350-H19 wires reinforced with steel (Aluminum Conductor Steel Reinforced). From literature, the underlying reason for this behavior remains unclear. In this study, finite element simulations are carried out to understand the influence of the aluminum alloy type on the conductor life. To support the discussion, experimental data available in the literature for AAAC 900 MCM and ACSR Tern conductors, as well as for the aluminum wires made of alloys 6201-T81 and 1350-H19, are utilized. The study provides valuable insights into the intricate relationship between the tensile strength and fretting fatigue resistance of the 6201-T81 aluminum alloy and their impact on the fatigue resistance of 6201-based conductors. Specifically, it reveals that while the increased tensile strength of this alloy enables the critical wires in the conductor to withstand higher stress levels, its resistance to fretting fatigue falls short in compensating the damaging effects of such elevated stresses. As a consequence, greater fatigue damage occurs in these wires, ultimately leading to a reduction in the overall durability of the conductor. The findings of this study bring a new understanding to the fatigue problem of 6201-based conductors and have the potential to change the design guidelines for transmission lines using these cables.
© 2023\n
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\n \n\n \n \n \n \n \n \n New model of shear modulus degradation and damping ratio curves for sensitive Canadian clays.\n \n \n \n \n\n\n \n Abdellaziz, M.; Karray, M.; Chekired, M.; Delisle, M.; Locat, P.; Ledoux, C.; and Mompin, R.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 60(6): 784 - 801. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"NewPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232614293294 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {New model of shear modulus degradation and damping ratio curves for sensitive Canadian clays},\njournal = {Canadian Geotechnical Journal},\nauthor = {Abdellaziz, Mustapha and Karray, Mourad and Chekired, Mohamed and Delisle, Marie-Christine and Locat, Pascal and Ledoux, Catherine and Mompin, Remi},\nvolume = {60},\nnumber = {6},\nyear = {2023},\npages = {784 - 801},\nissn = {00083674},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study investigated a new predictive model of the shear modulus reduction (G/G<inf>max</inf> - Log (γ<inf>c</inf>)) and damping ratio (Ξ - Log (γ <inf>c</inf>)) curves for sensitive eastern Canada clays. The model was established based on experimental measurements of G/G<inf>max</inf> and Ξ performed on 69 sensitive clay specimens from eastern Canada. The compiled database was first analyzed to qualitatively assess the influences of different soil parameters on the measurements. Next, statistical analyses using regression analysis and the modified hyperbolic model were performed. It was found that the G/Gmax and Ξ values of sensitive eastern Canada clays were influenced mainly by the plasticity index (I<inf>p</inf>), mean effective stress (σ′<inf>m</inf>), and structure, which was quantified by the liquidity index (I<inf>L</inf>). Based on the statistical analysis performed, new equations for G/G<inf>max</inf> and Ξ were proposed. The newly proposed model was compared with previously published models. The comparison clearly showed that the proposed model was more representative of sensitive eastern Canada clays. Consequently, it is suggested that the proposed model is more appropriate for use in the dynamic analysis of sensitive eastern Canada clay deposits as well as other similar soils.<br/></div> © 2023, Canadian Science Publishing. All rights reserved.},\nURL = {http://dx.doi.org/10.1139/cgj-2021-0475},\n} \n\n\n
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This study investigated a new predictive model of the shear modulus reduction (G/Gmax - Log (γc)) and damping ratio (Ξ - Log (γ c)) curves for sensitive eastern Canada clays. The model was established based on experimental measurements of G/Gmax and Ξ performed on 69 sensitive clay specimens from eastern Canada. The compiled database was first analyzed to qualitatively assess the influences of different soil parameters on the measurements. Next, statistical analyses using regression analysis and the modified hyperbolic model were performed. It was found that the G/Gmax and Ξ values of sensitive eastern Canada clays were influenced mainly by the plasticity index (Ip), mean effective stress (σ′m), and structure, which was quantified by the liquidity index (IL). Based on the statistical analysis performed, new equations for G/Gmax and Ξ were proposed. The newly proposed model was compared with previously published models. The comparison clearly showed that the proposed model was more representative of sensitive eastern Canada clays. Consequently, it is suggested that the proposed model is more appropriate for use in the dynamic analysis of sensitive eastern Canada clay deposits as well as other similar soils.
© 2023, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n A consistent multi-resolution particle method for fluid-driven granular dynamics.\n \n \n \n \n\n\n \n Jandaghian, M.; and Shakibaeinia, A.\n\n\n \n\n\n\n Advances in Water Resources, 178. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232614312749 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A consistent multi-resolution particle method for fluid-driven granular dynamics},\njournal = {Advances in Water Resources},\nauthor = {Jandaghian, Mojtaba and Shakibaeinia, Ahmad},\nvolume = {178},\nyear = {2023},\nissn = {03091708},\nabstract = {<div data-language="eng" data-ev-field="abstract">Granular dynamics driven by fluid flow is ubiquitous in many industrial and natural processes, such as fluvial and coastal sediment transport. Yet, their complex multiphysics and multi-scale nature challenge numerical models’ accuracy and efficiency. Here, we develop a new multi-resolution mesh-free particle method, based on an enhanced weakly-compressible Moving Particle Semi-implicit (MPS) method, to study the dynamics of rapid fluid-driven granular erosion. We propose and validate a novel multi-resolution multiphase MPS formulation for the consistent and conservative form of the governing equations, including particle stabilization techniques. First, we discuss the numerical accuracy and convergence of the proposed approximation operators through two numerical benchmark cases: the multi-viscosity Poiseuille flow and the multi-density hydrostatic pressure. Then, coupling the developed model with a generalized rheology equation, we investigate the water dam-break waves over movable beds. The particle convergence study confirms that the proposed multi-resolution formulation predicts the analytical solutions with acceptable accuracy and order of convergence. Validating the multiphase granular flow reveals that the mechanical behavior of this fluid-driven problem is highly sensitive to the water-sediment density ratio; the bed with lighter grains experiences extreme erosion and interface deformations. For the bed with a heavier material but different geometrical setups, the surge speed, and the transport layer thickness remain almost identical (away from the gate). Furthermore, while the multi-resolution model accurately estimates the global sediment dynamics, the single-resolution model underestimates the flow evolution. Overall, the qualitative and quantitative analysis of results emphasizes the importance of multi-scale multi-density interactions in fluid-driven modeling.<br/></div> © 2023 Elsevier Ltd},\nkey = {Erosion},\n%keywords = {Convergence of numerical methods;Granular materials;Hydraulics;Hydrostatic pressure;Multiphase flow;Multiphysics;Sediment transport;Sedimentation;Transport properties;},\n%note = {Dam-break erosion;Dam-breaks;Granular dynamics;Granular flows;Immersed granular flow;Multi-resolution particle method;Multi-scales;Numerical stability and convergence;Particle methods;Stability and convergence;},\nURL = {http://dx.doi.org/10.1016/j.advwatres.2023.104488},\n} \n\n\n
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Granular dynamics driven by fluid flow is ubiquitous in many industrial and natural processes, such as fluvial and coastal sediment transport. Yet, their complex multiphysics and multi-scale nature challenge numerical models’ accuracy and efficiency. Here, we develop a new multi-resolution mesh-free particle method, based on an enhanced weakly-compressible Moving Particle Semi-implicit (MPS) method, to study the dynamics of rapid fluid-driven granular erosion. We propose and validate a novel multi-resolution multiphase MPS formulation for the consistent and conservative form of the governing equations, including particle stabilization techniques. First, we discuss the numerical accuracy and convergence of the proposed approximation operators through two numerical benchmark cases: the multi-viscosity Poiseuille flow and the multi-density hydrostatic pressure. Then, coupling the developed model with a generalized rheology equation, we investigate the water dam-break waves over movable beds. The particle convergence study confirms that the proposed multi-resolution formulation predicts the analytical solutions with acceptable accuracy and order of convergence. Validating the multiphase granular flow reveals that the mechanical behavior of this fluid-driven problem is highly sensitive to the water-sediment density ratio; the bed with lighter grains experiences extreme erosion and interface deformations. For the bed with a heavier material but different geometrical setups, the surge speed, and the transport layer thickness remain almost identical (away from the gate). Furthermore, while the multi-resolution model accurately estimates the global sediment dynamics, the single-resolution model underestimates the flow evolution. Overall, the qualitative and quantitative analysis of results emphasizes the importance of multi-scale multi-density interactions in fluid-driven modeling.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Improved fire design of steel I-sections under combined compression and bending.\n \n \n \n \n\n\n \n Li, L.; Paquet, J.; Couto, C.; Vila Real, P.; and Boissonnade, N.\n\n\n \n\n\n\n Structures, 53: 346 - 360. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ImprovedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232614299337 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Improved fire design of steel I-sections under combined compression and bending},\njournal = {Structures},\nauthor = {Li, Liya and Paquet, Jeanne and Couto, Carlos and Vila Real, Paulo and Boissonnade, Nicolas},\nvolume = {53},\nyear = {2023},\npages = {346 - 360},\nissn = {23520124},\nabstract = {<div data-language="eng" data-ev-field="abstract">The fire resistance of hot-rolled and welded I-sections under combined compression and bending is numerically investigated in this study. Advanced non-linear shell models were developed and validated against existing experimental data on steady-state and transient-state tests. These models have been further used within parametric studies to gather a large cross-sectional resistance dataset. Various cross-section slenderness, section shapes, steel grades, fire temperatures and load combinations have been considered. The numerical results were used to evaluate the design rules suggested by current and upcoming European provisions, the EN 1993–1-2 and prEN 1993–1-2, respectively. It is observed that these two design recommendation sets usually lead to scattered and discontinuous resistance predictions, owing to the inappropriateness of the cross-sectional classification system and to inaccurate interaction equations. The Overall Interaction Concept (O.I.C.), which has been formerly proposed for the fire design of I-sections under axial compression or pure bending, is extended in this paper to combined compression and bending load cases and shown to yield more accurate, consistent and straightforward resistance predictions than EN 1993–1-2 and prEN 1993–1-2.<br/></div> © 2023 Institution of Structural Engineers},\nkey = {Fire resistance},\n%keywords = {Hot rolled steel;Hot rolling;Large dataset;},\n%note = {EN 1993;Fire designs;Hot-rolled;I-sections;Non linear;Shell models;Steady state and transients;Steady-state state;Steel I-section;Transient state tests;},\nURL = {http://dx.doi.org/10.1016/j.istruc.2023.04.021},\n} \n\n\n
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The fire resistance of hot-rolled and welded I-sections under combined compression and bending is numerically investigated in this study. Advanced non-linear shell models were developed and validated against existing experimental data on steady-state and transient-state tests. These models have been further used within parametric studies to gather a large cross-sectional resistance dataset. Various cross-section slenderness, section shapes, steel grades, fire temperatures and load combinations have been considered. The numerical results were used to evaluate the design rules suggested by current and upcoming European provisions, the EN 1993–1-2 and prEN 1993–1-2, respectively. It is observed that these two design recommendation sets usually lead to scattered and discontinuous resistance predictions, owing to the inappropriateness of the cross-sectional classification system and to inaccurate interaction equations. The Overall Interaction Concept (O.I.C.), which has been formerly proposed for the fire design of I-sections under axial compression or pure bending, is extended in this paper to combined compression and bending load cases and shown to yield more accurate, consistent and straightforward resistance predictions than EN 1993–1-2 and prEN 1993–1-2.
© 2023 Institution of Structural Engineers\n
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\n \n\n \n \n \n \n \n \n A corrugated steel fender for bridge pier protection against truck collision.\n \n \n \n \n\n\n \n Zhou, C.; Xie, Y.; Wang, W.; Zheng, Y.; and Cao, H.\n\n\n \n\n\n\n Thin-Walled Structures, 189. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232614286663 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A corrugated steel fender for bridge pier protection against truck collision},\njournal = {Thin-Walled Structures},\nauthor = {Zhou, Chang and Xie, Yazhou and Wang, Wenwei and Zheng, Yuzhou and Cao, Hongbin},\nvolume = {189},\nyear = {2023},\nissn = {02638231},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study proposes a novel corrugated steel fender system to protect bridge piers against truck collisions. In particular, the impact energy is mainly absorbed through the deformation of corrugated steel webs in the fender. Pendulum impact tests are conducted to demonstrate the benefits of installing the corrugated steel web to increase the fender stiffness, engage more lateral displacement, and dissipate considerable impact energy. Advanced finite element (FE) models are established using the software LS-DYNA and verified against experimental results of the pendulum impact test. Modeling considerations are implemented into developing a high-resolution FE model to simulate full-scale truck–fender–bridge collisions, which discloses the fender's effectiveness in protecting the bridge pier. The proposed fender system can mitigate the post-impact damage to the bridge pier by reducing its peak impact force, lateral displacement, and bending moment at the base. Moreover, parametric analyses are performed to investigate the effects of different fender design variables on the peak impact force and absorbed impact energy. Among various design parameters, the thicknesses of the corrugated steel web and surface steel plate are the predominant ones. Finally, an optimal fender design criteria is proposed to simultaneously minimize the impact damage to the bridge pier and the truck.<br/></div> © 2023 Elsevier Ltd},\nkey = {Trucks},\n%keywords = {Bridges;Finite element method;Pendulums;Piers;Software testing;Steel testing;},\n%note = {Corrugated steel;Corrugated steel fender;Corrugated steel webs;Element models;Fender systems;Finite element modeling;Impact energy;Parametric analysis;Pendulum impact test;Truck–bridge​ collision;},\nURL = {http://dx.doi.org/10.1016/j.tws.2023.110924},\n} \n\n\n
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This study proposes a novel corrugated steel fender system to protect bridge piers against truck collisions. In particular, the impact energy is mainly absorbed through the deformation of corrugated steel webs in the fender. Pendulum impact tests are conducted to demonstrate the benefits of installing the corrugated steel web to increase the fender stiffness, engage more lateral displacement, and dissipate considerable impact energy. Advanced finite element (FE) models are established using the software LS-DYNA and verified against experimental results of the pendulum impact test. Modeling considerations are implemented into developing a high-resolution FE model to simulate full-scale truck–fender–bridge collisions, which discloses the fender's effectiveness in protecting the bridge pier. The proposed fender system can mitigate the post-impact damage to the bridge pier by reducing its peak impact force, lateral displacement, and bending moment at the base. Moreover, parametric analyses are performed to investigate the effects of different fender design variables on the peak impact force and absorbed impact energy. Among various design parameters, the thicknesses of the corrugated steel web and surface steel plate are the predominant ones. Finally, an optimal fender design criteria is proposed to simultaneously minimize the impact damage to the bridge pier and the truck.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Insights on the role of local site effects on damage distribution in the Izmir metropolitan area induced by the October 30, 2020 Samos earthquake.\n \n \n \n \n\n\n \n Chiaradonna, A.; Karakan, E.; Kincal, C.; Lanzo, G.; Monaco, P.; Sezer, A.; and Karray, M.\n\n\n \n\n\n\n Soils and Foundations, 63(4). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"InsightsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232514271546 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Insights on the role of local site effects on damage distribution in the Izmir metropolitan area induced by the October 30, 2020 Samos earthquake},\njournal = {Soils and Foundations},\nauthor = {Chiaradonna, Anna and Karakan, Eyyub and Kincal, Cem and Lanzo, Giuseppe and Monaco, Paola and Sezer, Alper and Karray, Mourad},\nvolume = {63},\nnumber = {4},\nyear = {2023},\nissn = {00380806},\nabstract = {<div data-language="eng" data-ev-field="abstract">On the 30<sup>th</sup> of October 2020, a 6.6 magnitude earthquake occurred 14 km north of Samos Island, causing 119 casualties (117 in Izmir, Türkiye, and 2 in Samos, Greece) and significant damage in the 3<sup>rd</sup> biggest city of Türkiye, Izmir. Although the city is roughly 70 km far away from the epicenter, the damage was significant and concentrated in the city center settled on alluviums. This paper aims to analyze the distribution of damage in Izmir province, by crosschecking the recorded motions, the subsoil conditions and the evidence of damage as collected by an ad-hoc on-site reconnaissance. The intrinsic behavior of the Samos earthquake was investigated by employing three different ground-motion prediction equations. The results of the analyses revealed that site effects play a significant role in the amplification of ground motions, and valley effects are responsible for the concentration of damage. The damage in buildings was classified in terms of the intensity and structural typologies for the 30 districts of Izmir metropolitan area. In-depth analysis of the distribution of damages revealed that the earthquake caused damage all over the boundaries of Izmir province, and the concentration of damage in Bornova and Karşıyaka districts has a clear correlation with double resonance effects.<br/></div> © 2023},\nkey = {Equations of motion},\n%keywords = {Earthquake effects;Motion estimation;Soils;},\n%note = {2020 samos earthquake;Basin effects;Damage distribution;Double resonance;Earthquake records;GMPE model;Ground motion parameters;Local sites;Metropolitan area;Site effects;},\nURL = {http://dx.doi.org/10.1016/j.sandf.2023.101330},\n} \n\n\n
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On the 30th of October 2020, a 6.6 magnitude earthquake occurred 14 km north of Samos Island, causing 119 casualties (117 in Izmir, Türkiye, and 2 in Samos, Greece) and significant damage in the 3rd biggest city of Türkiye, Izmir. Although the city is roughly 70 km far away from the epicenter, the damage was significant and concentrated in the city center settled on alluviums. This paper aims to analyze the distribution of damage in Izmir province, by crosschecking the recorded motions, the subsoil conditions and the evidence of damage as collected by an ad-hoc on-site reconnaissance. The intrinsic behavior of the Samos earthquake was investigated by employing three different ground-motion prediction equations. The results of the analyses revealed that site effects play a significant role in the amplification of ground motions, and valley effects are responsible for the concentration of damage. The damage in buildings was classified in terms of the intensity and structural typologies for the 30 districts of Izmir metropolitan area. In-depth analysis of the distribution of damages revealed that the earthquake caused damage all over the boundaries of Izmir province, and the concentration of damage in Bornova and Karşıyaka districts has a clear correlation with double resonance effects.
© 2023\n
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\n \n\n \n \n \n \n \n \n Soil Moisture Retrieval During Crop Growth Cycle Using Satellite SAR Time Series.\n \n \n \n \n\n\n \n Muhuri, A.; Goita, K.; Magagi, R.; and Wang, H.\n\n\n \n\n\n\n IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 16: 9517 - 9534. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"SoilPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232314198129 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Soil Moisture Retrieval During Crop Growth Cycle Using Satellite SAR Time Series},\njournal = {IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing},\nauthor = {Muhuri, Arnab and Goita, Kalifa and Magagi, Ramata and Wang, Hongquan},\nvolume = {16},\nyear = {2023},\npages = {9517 - 9534},\nissn = {19391404},\nabstract = {<div data-language="eng" data-ev-field="abstract">Satellite SAR-based soil moisture retrieval over agricultural fields, under crop overlain conditions, is a challenging exercise. This is so because the overlying crop volume interacts with both the incoming and the backscattered radar signal. Therefore, the soil moisture linked solely to the top layer (0-5 cm) of the soil cannot be reliably retrieved under such conditions without avoiding the obscuring effect of growing crop volume. In this investigation, we demonstrated a proof-of-concept for a time-series approach to retrieve soil moisture during crop growth cycle. Contrary to the use of the single-scene approach, the novelty of the proposed approach lies in exploiting the satellite SAR time series acquired during a cropping cycle. The proposed time-series approach is effective for capturing the nuances in the crop phenological stages while calibrating the Dubois-water cloud model (WCM) soil moisture retrieval model. By employing this approach, we achieved the 0.04 m3 m-3 soil moisture retrieval root-mean-square error benchmark at a high spatial resolution and addressed the issue of solving for the Dubois-WCM model constants under data-constrained conditions. Furthermore, we observed that the combination of temporally non-overlapping vegetation descriptors (optical and SAR) resulted in degradation in the performance of the retrievals and under such circumstances single polarimetric descriptor performed better.<br/></div> © 2023 IEEE.},\nkey = {Soil moisture},\n%keywords = {Crops;Polarimeters;Satellites;Soil surveys;Surface roughness;Synthetic aperture radar;Time series;Vegetation mapping;},\n%note = {Duboi model;Polarimetric SAR;Radarsat-2;Rough surfaces;Satellite broadcasting;Satellite SAR;Soil moisture retrievals;Times series;Vegetation mapping;Water cloud models;},\nURL = {http://dx.doi.org/10.1109/JSTARS.2023.3280181},\n} \n\n\n
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Satellite SAR-based soil moisture retrieval over agricultural fields, under crop overlain conditions, is a challenging exercise. This is so because the overlying crop volume interacts with both the incoming and the backscattered radar signal. Therefore, the soil moisture linked solely to the top layer (0-5 cm) of the soil cannot be reliably retrieved under such conditions without avoiding the obscuring effect of growing crop volume. In this investigation, we demonstrated a proof-of-concept for a time-series approach to retrieve soil moisture during crop growth cycle. Contrary to the use of the single-scene approach, the novelty of the proposed approach lies in exploiting the satellite SAR time series acquired during a cropping cycle. The proposed time-series approach is effective for capturing the nuances in the crop phenological stages while calibrating the Dubois-water cloud model (WCM) soil moisture retrieval model. By employing this approach, we achieved the 0.04 m3 m-3 soil moisture retrieval root-mean-square error benchmark at a high spatial resolution and addressed the issue of solving for the Dubois-WCM model constants under data-constrained conditions. Furthermore, we observed that the combination of temporally non-overlapping vegetation descriptors (optical and SAR) resulted in degradation in the performance of the retrievals and under such circumstances single polarimetric descriptor performed better.
© 2023 IEEE.\n
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\n \n\n \n \n \n \n \n \n Vertical floor spectra in low- and mid-rise elastic RC moment resisting frame buildings.\n \n \n \n \n\n\n \n Mazloom, S.; and Assi, R.\n\n\n \n\n\n\n Engineering Structures, 290. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"VerticalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232214169614 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Vertical floor spectra in low- and mid-rise elastic RC moment resisting frame buildings},\njournal = {Engineering Structures},\nauthor = {Mazloom, Shahabaldin and Assi, Rola},\nvolume = {290},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">To examine how floor spectral accelerations affect the design force of flexible Non-Structural Components (NSCs), the present study discusses the estimation of floor response spectra resulting from strong vertical seismic motion. 3-, 6-, 9- and 12-storey reinforced concrete buildings with moderately ductile moment-resisting frame systems, designed in accordance with the National Building Code of Canada [25] were selected for this research. 65 sets of historical records relating to 31 severe earthquakes from across the world were used to analyze the linear behavior of these structures. A constant amplification of the Vertical Floor Spectral Acceleration (FSA<inf>V</inf>) was observed along the building height. This amplification was noticeably elevated for slab nodes, especially at the center of the interior slab and in shorter buildings. Furthermore, the vertical component of the earthquake had a greater impact at shorter periods, since the maximum vertical acceleration occurred at periods lasting less than 0.35 sec. Finally, equations to estimate FSA<inf>V</inf> corresponding to the input vertical ground acceleration were proposed for typical code-conforming RC frame buildings.<br/></div> © 2023 Elsevier Ltd},\nkey = {Floors},\n%keywords = {Acceleration;Concrete buildings;Earthquakes;Reinforced concrete;Seismic design;Structural frames;},\n%note = {Ground-motion;Height effect;Moment resisting frames;Non-structural component;Non-structural components;RC moment-resisting frame;Spectral acceleration;Vertical acceleration of ground motion;Vertical accelerations;Vertical floor spectral acceleration (FSAV);},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.116352},\n} \n\n\n
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To examine how floor spectral accelerations affect the design force of flexible Non-Structural Components (NSCs), the present study discusses the estimation of floor response spectra resulting from strong vertical seismic motion. 3-, 6-, 9- and 12-storey reinforced concrete buildings with moderately ductile moment-resisting frame systems, designed in accordance with the National Building Code of Canada [25] were selected for this research. 65 sets of historical records relating to 31 severe earthquakes from across the world were used to analyze the linear behavior of these structures. A constant amplification of the Vertical Floor Spectral Acceleration (FSAV) was observed along the building height. This amplification was noticeably elevated for slab nodes, especially at the center of the interior slab and in shorter buildings. Furthermore, the vertical component of the earthquake had a greater impact at shorter periods, since the maximum vertical acceleration occurred at periods lasting less than 0.35 sec. Finally, equations to estimate FSAV corresponding to the input vertical ground acceleration were proposed for typical code-conforming RC frame buildings.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Cold-formed steel centre-sheathed (mid-ply) shear walls of intermediate resistance.\n \n \n \n \n\n\n \n Wu, J. C.; and Rogers, C. A.\n\n\n \n\n\n\n Thin-Walled Structures, 188. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"Cold-formedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232214152447 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Cold-formed steel centre-sheathed (mid-ply) shear walls of intermediate resistance},\njournal = {Thin-Walled Structures},\nauthor = {Wu, Jia Cheng and Rogers, Colin A.},\nvolume = {188},\nyear = {2023},\nissn = {02638231},\nabstract = {<div data-language="eng" data-ev-field="abstract">To enter the market for mid-rise buildings, cold-formed steel (CFS) framed steel sheathed shear walls need to resist seismic forces in excess of 60 kN/m. An innovative configuration in which the sheathing is placed at the mid-line of the framing was developed through a laboratory test program. These centre-sheathed shear walls provided a substantial increase in shear resistance, over four times that currently found in the AISI S400 Standard, as well as an increase in ductility. Nine additional shear walls subjected to asymmetric in-plane cyclic loading were investigated in this study. These walls reached intermediate shear resistances between 46.7 kN/m and 91.0 kN/m and could maintain this resistance beyond drift ratios of 4%. In addition, three tests were carried out on the bare frame to identify the shear capacity provided by the specially detailed perimeter frame. An updated equation-based model, including the frame effect, was proposed for predicting the ultimate shear strengths of these shear walls.<br/></div> © 2023 Elsevier Ltd},\nkey = {Shear walls},\n%keywords = {High strength steel;Seismic design;Seismology;Shear flow;Software testing;Studs (structural members);},\n%note = {Cold-formed steel;Drift ratio;High-strength;Intermediate resistance;Laboratory test;Seismic;Seismic forces;Shear resistances;Steel-framed;Test projects;},\nURL = {http://dx.doi.org/10.1016/j.tws.2023.110834},\n} \n\n\n
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To enter the market for mid-rise buildings, cold-formed steel (CFS) framed steel sheathed shear walls need to resist seismic forces in excess of 60 kN/m. An innovative configuration in which the sheathing is placed at the mid-line of the framing was developed through a laboratory test program. These centre-sheathed shear walls provided a substantial increase in shear resistance, over four times that currently found in the AISI S400 Standard, as well as an increase in ductility. Nine additional shear walls subjected to asymmetric in-plane cyclic loading were investigated in this study. These walls reached intermediate shear resistances between 46.7 kN/m and 91.0 kN/m and could maintain this resistance beyond drift ratios of 4%. In addition, three tests were carried out on the bare frame to identify the shear capacity provided by the specially detailed perimeter frame. An updated equation-based model, including the frame effect, was proposed for predicting the ultimate shear strengths of these shear walls.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Probabilistic lateral stability and shear failure limit states of bridge natural rubber bearings.\n \n \n \n \n\n\n \n Bandini, P. A. C.; Gauron, O.; Saidou, A.; Busson, A.; and Paultre, P.\n\n\n \n\n\n\n Engineering Structures, 289. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ProbabilisticPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232014101413 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Probabilistic lateral stability and shear failure limit states of bridge natural rubber bearings},\njournal = {Engineering Structures},\nauthor = {Bandini, Pedro Alexandre Conde and Gauron, Olivier and Saidou, Adamou and Busson, Arnaud and Paultre, Patrick},\nvolume = {289},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study presents the results of a parametric analysis on a wide range of geometries of bridge natural rubber bearings for the definition of consistent limit states. This range, defined as a matrix depending on the shape factor, slenderness ratio, and device width, ensures maximum homogeneity of the studied population based on values typically found in practice for bridge applications. The effects of typical axial loads are also considered. Numerical analyses are performed on a finite element model previously developed by the authors that is capable of simulating shear failure and buckling limit states. Each specimen undergoes a numerical pushover analysis to obtain the critical shear strain and the type of ultimate limit state achieved. The results of the numerical analyses are first presented to show the influence of the investigated parameters on the type of limit state and the corresponding value of critical deformation. Design charts are constructed for practicing engineers. In addition, this work addresses the framework of performance-based design of bridges, with the objective of defining convenient damage states for the construction of bridge fragility curves. For this purpose, the statistical importance of each studied bearing pad or seismic isolator with respect to the whole population is taken into account to develop probabilistic capacity models. A slenderness threshold is validated for isolators to distinguish between potential limit states.<br/></div> © 2023 Elsevier Ltd},\nkey = {Rubber},\n%keywords = {Bearings (structural);Bridges;Buckling;Nonmetallic bearings;Numerical analysis;Population statistics;Seismology;Shear strain;},\n%note = {Bridge rubber bearing;Failure limit;Lateral stability;Limit state;Performance limit state;Performance limits;Probabilistics;Rubber bearing;Seismic isolation;Shear failure;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.116257},\n} \n\n\n
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This study presents the results of a parametric analysis on a wide range of geometries of bridge natural rubber bearings for the definition of consistent limit states. This range, defined as a matrix depending on the shape factor, slenderness ratio, and device width, ensures maximum homogeneity of the studied population based on values typically found in practice for bridge applications. The effects of typical axial loads are also considered. Numerical analyses are performed on a finite element model previously developed by the authors that is capable of simulating shear failure and buckling limit states. Each specimen undergoes a numerical pushover analysis to obtain the critical shear strain and the type of ultimate limit state achieved. The results of the numerical analyses are first presented to show the influence of the investigated parameters on the type of limit state and the corresponding value of critical deformation. Design charts are constructed for practicing engineers. In addition, this work addresses the framework of performance-based design of bridges, with the objective of defining convenient damage states for the construction of bridge fragility curves. For this purpose, the statistical importance of each studied bearing pad or seismic isolator with respect to the whole population is taken into account to develop probabilistic capacity models. A slenderness threshold is validated for isolators to distinguish between potential limit states.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n Local buckling and design of aluminum I-shapes.\n \n \n \n\n\n \n Coderre, T.; Li, L.; Dahboul, S.; and Boissonnade, N.\n\n\n \n\n\n\n In Charlotte, NC, United states, 2023. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20232014111438 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Local buckling and design of aluminum I-shapes},\njournal = {Proceedings of the Annual Stability Conference Structural Stability Research Council, SSRC 2023},\nauthor = {Coderre, Tristan and Li, Liya and Dahboul, Sahar and Boissonnade, Nicolas},\nyear = {2023},\naddress = {Charlotte, NC, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Current standards use simplified approaches to predict the resistance of aluminum elements that are not optimized to account for the effects of strain hardening, instabilities, and heat reduced properties. This paper summarizes investigations towards the development of an alternative design method for aluminum open cross-sections, based on the Overall Interaction Concept (O.I.C.). This innovative design approach relies on the interaction between resistance and stability, and also allows to consider geometrical and material imperfections. Moreover, it allows to obtain direct, precise and consistent resistance predictions using continuous buckling curves. A numerical finite element model was developed to accurately predict the cross-sectional resistance of aluminum elements. Its efficiency was validated by comparing its numerical resistance predictions to available experimental test data. Extensive parametric studies were then conducted, allowing to study the impact of varying geometries, alloys, and load cases on the resistance. Using the results from more than 2 300+ numerical simulations, O.I.C.-type design proposals were formulated for the local resistance of extruded and welded aluminum sections. The performance of the design proposals was evaluated by comparing their resistance estimates to the reference numerical results and to resistance predictions from the Canadian, European, and American aluminum design standards. The comparisons showed that the O.I.C. design proposal leads to much more accurate and consistent results than these standards, while remaining simpler and more efficient.<br/></div> © 2023 SSRC. All Rights Reserved.},\nkey = {Aluminum},\n%keywords = {Buckling;Design;Forecasting;Heat resistance;Strain hardening;},\n%note = {'current;Alternative designs;Design method;Design proposal;Effects of strains;Innovative design;Interaction concepts;Local buckling;Property;Section-based;},\n} \n\n\n
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Current standards use simplified approaches to predict the resistance of aluminum elements that are not optimized to account for the effects of strain hardening, instabilities, and heat reduced properties. This paper summarizes investigations towards the development of an alternative design method for aluminum open cross-sections, based on the Overall Interaction Concept (O.I.C.). This innovative design approach relies on the interaction between resistance and stability, and also allows to consider geometrical and material imperfections. Moreover, it allows to obtain direct, precise and consistent resistance predictions using continuous buckling curves. A numerical finite element model was developed to accurately predict the cross-sectional resistance of aluminum elements. Its efficiency was validated by comparing its numerical resistance predictions to available experimental test data. Extensive parametric studies were then conducted, allowing to study the impact of varying geometries, alloys, and load cases on the resistance. Using the results from more than 2 300+ numerical simulations, O.I.C.-type design proposals were formulated for the local resistance of extruded and welded aluminum sections. The performance of the design proposals was evaluated by comparing their resistance estimates to the reference numerical results and to resistance predictions from the Canadian, European, and American aluminum design standards. The comparisons showed that the O.I.C. design proposal leads to much more accurate and consistent results than these standards, while remaining simpler and more efficient.
© 2023 SSRC. All Rights Reserved.\n
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\n \n\n \n \n \n \n \n Stability and design of stainless WF shapes in combined compression and bending.\n \n \n \n\n\n \n Gagne, A.; Li, L.; and Boissonnade, N.\n\n\n \n\n\n\n In Charlotte, NC, United states, 2023. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20232014111443 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Stability and design of stainless WF shapes in combined compression and bending},\njournal = {Proceedings of the Annual Stability Conference Structural Stability Research Council, SSRC 2023},\nauthor = {Gagne, Anne-Sophie and Li, Liya and Boissonnade, Nicolas},\nyear = {2023},\naddress = {Charlotte, NC, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Stainless steel is characterized by a non-linear material response, which, unlike regular carbon steel, does not exhibit a typical yield plateau. This is sufficient to invalidate the classical design rules used in steel construction. This paper therefore proposes a different approach to predict the resistance of stainless steel open cross-sections. First, numerical models suited to stainless steel sections are developed and validated against experimental results. The models are then used to perform finite element simulations allowing to consider many stainless steel grades, load cases and geometries. The numerical reference results may then be used to assess the merits of a two-stage approach for simple load cases: an approach based on strains for compact sections, and an approach based on local buckling curves for more slender sections. Further, an interaction equation is calibrated for combined load cases. The proposed design approach is shown economical, simple and safe, as well as being an improvement over the performance of existing approaches.<br/></div> © 2023 SSRC. All Rights Reserved.},\nkey = {Stainless steel},\n%note = {Buckling curves;Design rules;Finite elements simulation;Local buckling;Material response;Nonlinear materials;Simple++;Stainless steel grades;Stainless steel sections;Two-stage approaches;},\n} \n\n\n
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Stainless steel is characterized by a non-linear material response, which, unlike regular carbon steel, does not exhibit a typical yield plateau. This is sufficient to invalidate the classical design rules used in steel construction. This paper therefore proposes a different approach to predict the resistance of stainless steel open cross-sections. First, numerical models suited to stainless steel sections are developed and validated against experimental results. The models are then used to perform finite element simulations allowing to consider many stainless steel grades, load cases and geometries. The numerical reference results may then be used to assess the merits of a two-stage approach for simple load cases: an approach based on strains for compact sections, and an approach based on local buckling curves for more slender sections. Further, an interaction equation is calibrated for combined load cases. The proposed design approach is shown economical, simple and safe, as well as being an improvement over the performance of existing approaches.
© 2023 SSRC. All Rights Reserved.\n
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\n \n\n \n \n \n \n \n Design of steel beams affected by local/global coupled instabilities.\n \n \n \n\n\n \n Gerard, L.; and Boissonnade, N.\n\n\n \n\n\n\n In Charlotte, NC, United states, 2023. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20232014111445 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design of steel beams affected by local/global coupled instabilities},\njournal = {Proceedings of the Annual Stability Conference Structural Stability Research Council, SSRC 2023},\nauthor = {Gerard, Lucile and Boissonnade, Nicolas},\nyear = {2023},\naddress = {Charlotte, NC, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">The present paper investigates the resistance of I and H-shapes subjected to uniform major-axis bending moment and prone to suffer from local/global coupling effects. Numerical parametric studies allowed the determination of local/global coupling functions for hot-rolled and welded sections aiming at correcting the influence of local effects – which tends to decrease – when the member slenderness increases. These functions, included into an O.I.C.-type design approach, may be seen as an alternative to the current Eurocode rules in which local/global interactions are roughly accounted for through the global relative slenderness definition and a rather conservative final strength verification. A formulation predicting the strength of beams made of such sections is then eventually suggested. These design proposals were seen to lead to great improvements in accuracy and consistency compared to current European provisions.<br/></div> © 2023 SSRC. All Rights Reserved.},\nkey = {Hot rolling},\n%keywords = {Hot rolled steel;Steel beams and girders;},\n%note = {'current;Coupling effect;Coupling functions;Global coupling;Hot-rolled;Local effects;Major axis;Numerical parametric studies;Steel beams;Type designs;},\n} \n\n\n
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The present paper investigates the resistance of I and H-shapes subjected to uniform major-axis bending moment and prone to suffer from local/global coupling effects. Numerical parametric studies allowed the determination of local/global coupling functions for hot-rolled and welded sections aiming at correcting the influence of local effects – which tends to decrease – when the member slenderness increases. These functions, included into an O.I.C.-type design approach, may be seen as an alternative to the current Eurocode rules in which local/global interactions are roughly accounted for through the global relative slenderness definition and a rather conservative final strength verification. A formulation predicting the strength of beams made of such sections is then eventually suggested. These design proposals were seen to lead to great improvements in accuracy and consistency compared to current European provisions.
© 2023 SSRC. All Rights Reserved.\n
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\n \n\n \n \n \n \n \n Cross-section stability of hot-rolled and welded I-shapes under combined loading.\n \n \n \n\n\n \n Li, L.; Gerard, L.; and Boissonnade, N.\n\n\n \n\n\n\n In Charlotte, NC, United states, 2023. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20232014111456 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Cross-section stability of hot-rolled and welded I-shapes under combined loading},\njournal = {Proceedings of the Annual Stability Conference Structural Stability Research Council, SSRC 2023},\nauthor = {Li, Liya and Gerard, Lucile and Boissonnade, Nicolas},\nyear = {2023},\naddress = {Charlotte, NC, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper investigates the resistance capacity of hot-rolled and welded I-sections subjected to combined loading as influenced by plasticity and local buckling effects. Extensive numerical parametric studies through validated finite element models were carried out to consider different steel grades, section shapes and various load cases including bi-axial bending without axial compression (My+Mz), mono-axial bending with axial compression (N+My or N+Mz) and bi-axial bending with axial compression (N+My+Mz). Based on the Overall Interaction Concept (O.I.C.), a three-dimensional resistance space was built to capture the cross-section behaviour under different load cases and interaction design equations are proposed, based on the numerical results. Overall, it is evidenced that the proposed O.I.C approach provides more continuous and significantly more accurate resistance predictions than existing design standards.<br/></div> © 2023 SSRC. All Rights Reserved.},\nkey = {Axial compression},\n%keywords = {Hot rolled steel;Hot rolling;Welding;},\n%note = {Axial bending;Buckling effects;Combined loading;Finite element modelling (FEM);Hot-rolled;I-sections;Local buckling;Numerical parametric studies;Resistance capacity;Steel grades;},\n} \n\n\n
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This paper investigates the resistance capacity of hot-rolled and welded I-sections subjected to combined loading as influenced by plasticity and local buckling effects. Extensive numerical parametric studies through validated finite element models were carried out to consider different steel grades, section shapes and various load cases including bi-axial bending without axial compression (My+Mz), mono-axial bending with axial compression (N+My or N+Mz) and bi-axial bending with axial compression (N+My+Mz). Based on the Overall Interaction Concept (O.I.C.), a three-dimensional resistance space was built to capture the cross-section behaviour under different load cases and interaction design equations are proposed, based on the numerical results. Overall, it is evidenced that the proposed O.I.C approach provides more continuous and significantly more accurate resistance predictions than existing design standards.
© 2023 SSRC. All Rights Reserved.\n
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\n \n\n \n \n \n \n \n \n Wind loading on a stepped roof building: Comparison of field measurements, wind tunnel data, and standard provisions.\n \n \n \n \n\n\n \n Aldoum, M.; Stathopoulos, T.; Chavez, M.; and Baskaran, A.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 238. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"WindPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231814045244 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind loading on a stepped roof building: Comparison of field measurements, wind tunnel data, and standard provisions},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Aldoum, M. and Stathopoulos, T. and Chavez, M. and Baskaran, A.},\nvolume = {238},\nyear = {2023},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study investigates wind loads on stepped roof buildings measured in the field and in an atmospheric boundary layer wind tunnel to verify the suitability of the North American codes and standards for the design of stepped roofs. Good agreement has been generally found between field and wind tunnel results. The field measurements and wind tunnel results were compared with the NBCC 2020 and ASCE/SEI 7–22 (2022) provisions. It was found that the Edge provisions of NBCC 2020 are currently underestimated and need to be increased. The study suggests merging the Corner and Edge zones into a single "Perimeter" zone in NBCC 2020 as this would resolve the current underestimation of the NBCC Edge wind loads and add simplicity to the Code provisions. Peaks of ASCE/SEI 7–22 (2022) were found conservative, except for the zone near the step wall on the lower roof; ASCE/SEI 7–22 (2022) positive peaks seem to be underestimated.<br/></div> © 2023},\nkey = {Wind tunnels},\n%keywords = {Aerodynamic loads;Atmospheric boundary layer;Codes (symbols);Roofs;Wind stress;},\n%note = {ASCE 7-22;Boundary layer wind tunnel;Field data;Field measurement;NBCC 2020;North American;Stepped roof building;Wind load;Wind loading;Wind-tunnel data;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2023.105441},\n} \n\n\n
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This study investigates wind loads on stepped roof buildings measured in the field and in an atmospheric boundary layer wind tunnel to verify the suitability of the North American codes and standards for the design of stepped roofs. Good agreement has been generally found between field and wind tunnel results. The field measurements and wind tunnel results were compared with the NBCC 2020 and ASCE/SEI 7–22 (2022) provisions. It was found that the Edge provisions of NBCC 2020 are currently underestimated and need to be increased. The study suggests merging the Corner and Edge zones into a single \"Perimeter\" zone in NBCC 2020 as this would resolve the current underestimation of the NBCC Edge wind loads and add simplicity to the Code provisions. Peaks of ASCE/SEI 7–22 (2022) were found conservative, except for the zone near the step wall on the lower roof; ASCE/SEI 7–22 (2022) positive peaks seem to be underestimated.
© 2023\n
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\n \n\n \n \n \n \n \n \n Assessment of seismic acceleration demands on nonstructural components in moderately ductile RC frame buildings designed according to NBC 2015.\n \n \n \n \n\n\n \n Shayan, R. S.; and Assi, R.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 50(4): 335 - 347. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"AssessmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231814042770 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment of seismic acceleration demands on nonstructural components in moderately ductile RC frame buildings designed according to NBC 2015},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Shayan, Reza Sheikhzadeh and Assi, Rola},\nvolume = {50},\nnumber = {4},\nyear = {2023},\npages = {335 - 347},\nissn = {03151468},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents an extensive investigation of the seismic demands on acceleration-sensitive nonstructural components (NSCs) attached to reinforced concrete moment-resisting frame buildings with limited ductility and designed according to the National Building Code of Canada. A total of four benchmark structures with varying heights are considered in this study. Linear and nonlinear time-history analyses were performed using artificial ground motions compatible with Montreal site Class C uniform hazard spectra having 2% and 10% probabilities of being exceeded in 50 years. Seismic acceleration demands on NSCs were evaluated by assessing the horizontal height factor A<inf>x</inf>, the component dynamic amplification factor A<inf>r</inf>, and the component force factor S<inf>p</inf> compared with various building code provisions. The overall acceleration demands of NSCs are discussed, and a corresponding optimized S<inf>p</inf> profile is proposed to improve the estimation of the seismic force demands on NSCs at the rooftops of buildings located in moderate seismic zones.<br/></div> © 2023 The Author(s).},\nkey = {Reinforced concrete},\n%keywords = {Acceleration;Building codes;Buildings;C (programming language);Ductility;Hazards;Seismology;Structural frames;},\n%note = {Acceleration sensitive;Component force factor;Frame buildings;Non-structural components;R.C. frames;RC frames;Seismic acceleration demand;Seismic accelerations;Seismic demands;Uniform hazard spectrums;},\nURL = {http://dx.doi.org/10.1139/cjce-2022-0222},\n} \n\n\n
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This paper presents an extensive investigation of the seismic demands on acceleration-sensitive nonstructural components (NSCs) attached to reinforced concrete moment-resisting frame buildings with limited ductility and designed according to the National Building Code of Canada. A total of four benchmark structures with varying heights are considered in this study. Linear and nonlinear time-history analyses were performed using artificial ground motions compatible with Montreal site Class C uniform hazard spectra having 2% and 10% probabilities of being exceeded in 50 years. Seismic acceleration demands on NSCs were evaluated by assessing the horizontal height factor Ax, the component dynamic amplification factor Ar, and the component force factor Sp compared with various building code provisions. The overall acceleration demands of NSCs are discussed, and a corresponding optimized Sp profile is proposed to improve the estimation of the seismic force demands on NSCs at the rooftops of buildings located in moderate seismic zones.
© 2023 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Urban microclimate and its impact on built environment – A review.\n \n \n \n \n\n\n \n Yang, S.; Wang, L. (.; Stathopoulos, T.; and Marey, A. M.\n\n\n \n\n\n\n Building and Environment, 238. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"UrbanPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231814047491 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Urban microclimate and its impact on built environment – A review},\njournal = {Building and Environment},\nauthor = {Yang, Senwen and Wang, Liangzhu (Leon) and Stathopoulos, Ted and Marey, Ahmed Moustafa},\nvolume = {238},\nyear = {2023},\nissn = {03601323},\nabstract = {<div data-language="eng" data-ev-field="abstract">Increasing urbanization and population growth have brought attention to urban microclimates in recent years. The study on urban microclimate and its impact on the built environment is gaining momentum. A growing number of researchers have examined the relationship between human activity and the immediate surroundings to reduce adverse impacts on the environment and climate. This paper presents the latest progress in urban microclimate research on urban wind and thermal environment, covering traditional methods, including field measurements, wind tunnel modeling, and CFD simulations, as well as emerging methods, such as artificial intelligence or data-driven models. Among the publications reviewed, the topics include isothermal scenarios that neglected thermal aspects (e.g., urban wind energy, wind comfort), as well as thermal scenarios (e.g., urban heat islands and outdoor thermal comfort). In the review, it was found that CFD has been widely applied due to its well-developed nature. In addition to field measurements, new techniques (such as satellite and thermal imaging) provide valuable validation data for CFD and training data for artificial intelligence applications. In isothermal scenarios, wind tunnel modeling has been successfully applied. However, thermal scenarios present significant challenges. In addition, urban data-driven models have emerged with promising results, but systematic investigations have been limited. In this paper, we identify future research needs for urban microclimates based on an overview of recent progress.<br/></div> © 2023 Elsevier Ltd},\nkey = {Computational fluid dynamics},\n%keywords = {Artificial intelligence;Atmospheric temperature;Infrared imaging;Isotherms;Population statistics;Urban growth;Wind power;Wind tunnels;},\n%note = {Built environment;Computational fluid dynamic;Data-driven model;Field measurement;Thermal;Urban heat island;Urban microclimate;Wind tunnel experiment;Wind tunnel models;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2023.110334},\n} \n\n\n
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Increasing urbanization and population growth have brought attention to urban microclimates in recent years. The study on urban microclimate and its impact on the built environment is gaining momentum. A growing number of researchers have examined the relationship between human activity and the immediate surroundings to reduce adverse impacts on the environment and climate. This paper presents the latest progress in urban microclimate research on urban wind and thermal environment, covering traditional methods, including field measurements, wind tunnel modeling, and CFD simulations, as well as emerging methods, such as artificial intelligence or data-driven models. Among the publications reviewed, the topics include isothermal scenarios that neglected thermal aspects (e.g., urban wind energy, wind comfort), as well as thermal scenarios (e.g., urban heat islands and outdoor thermal comfort). In the review, it was found that CFD has been widely applied due to its well-developed nature. In addition to field measurements, new techniques (such as satellite and thermal imaging) provide valuable validation data for CFD and training data for artificial intelligence applications. In isothermal scenarios, wind tunnel modeling has been successfully applied. However, thermal scenarios present significant challenges. In addition, urban data-driven models have emerged with promising results, but systematic investigations have been limited. In this paper, we identify future research needs for urban microclimates based on an overview of recent progress.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n A deep convolutional neural network for predicting electricity consumption at Grey Nuns building in Canada.\n \n \n \n \n\n\n \n Elshaboury, N.; Mohammed Abdelkader, E.; Al-Sakkaf, A.; and Bagchi, A.\n\n\n \n\n\n\n Construction Innovation. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231714018419 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A deep convolutional neural network for predicting electricity consumption at Grey Nuns building in Canada},\njournal = {Construction Innovation},\nauthor = {Elshaboury, Nehal and Mohammed Abdelkader, Eslam and Al-Sakkaf, Abobakr and Bagchi, Ashutosh},\nyear = {2023},\nissn = {14714175},\nabstract = {<div data-language="eng" data-ev-field="abstract">Purpose: The energy efficiency of buildings has been emphasized along with the continual development in the building and construction sector that consumes a significant amount of energy. To this end, the purpose of this research paper is to forecast energy consumption to improve energy resource planning and management. Design/methodology/approach: This study proposes the application of the convolutional neural network (CNN) for estimating the electricity consumption in the Grey Nuns building in Canada. The performance of the proposed model is compared against that of long short-term memory (LSTM) and multilayer perceptron (MLP) neural networks. The models are trained and tested using monthly electricity consumption records (i.e. from May 2009 to December 2021) available from Concordia’s facility department. Statistical measures (e.g. determination coefficient [R<sup>2</sup>], root mean squared error [RMSE], mean absolute error [MAE] and mean absolute percentage error [MAPE]) are used to evaluate the outcomes of models. Findings: The results reveal that the CNN model outperforms the other model predictions for 6 and 12 months ahead. It enhances the performance metrics reported by the LSTM and MLP models concerning the R<sup>2</sup>, RMSE, MAE and MAPE by more than 4%, 6%, 42% and 46%, respectively. Therefore, the proposed model uses the available data to predict the electricity consumption for 6 and 12 months ahead. In June and December 2022, the overall electricity consumption is estimated to be 195,312 kWh and 254,737 kWh, respectively. Originality/value: This study discusses the development of an effective time-series model that can forecast future electricity consumption in a Canadian heritage building. Deep learning techniques are being used for the first time to anticipate the electricity consumption of the Grey Nuns building in Canada. Additionally, it evaluates the effectiveness of deep learning and machine learning methods for predicting electricity consumption using established performance indicators. Recognizing electricity consumption in buildings is beneficial for utility providers, facility managers and end users by improving energy and environmental efficiency.<br/></div> © 2023, Emerald Publishing Limited.},\nkey = {Energy efficiency},\n%keywords = {Brain;Buildings;Construction industry;Convolution;Convolutional neural networks;Deep neural networks;Electric power utilization;Errors;Forecasting;Learning systems;Long short-term memory;Mean square error;Multilayer neural networks;Time series;},\n%note = {Building and construction;Convolutional neural network;Deep learning;Electricity-consumption;Energy;Mean absolute error;Multilayers perceptrons;Percentage error;Root mean squared errors;Times series;},\nURL = {http://dx.doi.org/10.1108/CI-01-2023-0005},\n} \n\n\n
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Purpose: The energy efficiency of buildings has been emphasized along with the continual development in the building and construction sector that consumes a significant amount of energy. To this end, the purpose of this research paper is to forecast energy consumption to improve energy resource planning and management. Design/methodology/approach: This study proposes the application of the convolutional neural network (CNN) for estimating the electricity consumption in the Grey Nuns building in Canada. The performance of the proposed model is compared against that of long short-term memory (LSTM) and multilayer perceptron (MLP) neural networks. The models are trained and tested using monthly electricity consumption records (i.e. from May 2009 to December 2021) available from Concordia’s facility department. Statistical measures (e.g. determination coefficient [R2], root mean squared error [RMSE], mean absolute error [MAE] and mean absolute percentage error [MAPE]) are used to evaluate the outcomes of models. Findings: The results reveal that the CNN model outperforms the other model predictions for 6 and 12 months ahead. It enhances the performance metrics reported by the LSTM and MLP models concerning the R2, RMSE, MAE and MAPE by more than 4%, 6%, 42% and 46%, respectively. Therefore, the proposed model uses the available data to predict the electricity consumption for 6 and 12 months ahead. In June and December 2022, the overall electricity consumption is estimated to be 195,312 kWh and 254,737 kWh, respectively. Originality/value: This study discusses the development of an effective time-series model that can forecast future electricity consumption in a Canadian heritage building. Deep learning techniques are being used for the first time to anticipate the electricity consumption of the Grey Nuns building in Canada. Additionally, it evaluates the effectiveness of deep learning and machine learning methods for predicting electricity consumption using established performance indicators. Recognizing electricity consumption in buildings is beneficial for utility providers, facility managers and end users by improving energy and environmental efficiency.
© 2023, Emerald Publishing Limited.\n
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\n \n\n \n \n \n \n \n \n Codification of wind loads on hip roof overhangs of low-rise buildings.\n \n \n \n \n\n\n \n Mostafa, K.; Zisis, I.; and Stathopoulos, T.\n\n\n \n\n\n\n Engineering Structures, 288. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"CodificationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231714024808 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Codification of wind loads on hip roof overhangs of low-rise buildings},\njournal = {Engineering Structures},\nauthor = {Mostafa, Karim and Zisis, Ioannis and Stathopoulos, Ted},\nvolume = {288},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Recent funding opportunities for Wind Engineering research have generated a significant amount of knowledge that has the potential to both develop new or enhance existing wind standards and building codes of practice. Building codes tend to get more rigorous over time to better mitigate damage on buildings and structures. Roof overhangs which are an integral part of the roofing system in low-rise buildings, is particularly vulnerable to damage in wind events due to its exposure to wind-induced loads on both upper and lower surfaces. Large scale wind tunnel testing was carried out at the Wall of Wind (WOW) Research Experimental Facility to investigate the wind-induced loads on roof overhangs of low-rise residential buildings. The physical testing protocol included six 1:10 scaled models with varying geometrical parameters such as roof slope and roof overhang width. Peak wind pressures on both the upper and lower surfaces were measured to calculate the simultaneous net pressure coefficients along the overhangs. Area-averaged pressure analysis was carried out to investigate the pressure gradients on single or groups of taps on the overhangs, soffits, and walls. The experimentally derived area averaged GC<inf>p</inf> values were compared to previous and current versions of wind standards to evaluate their adequacy. The findings revealed that the provisions’ design guidelines are less conservative for some roofing and wall zones, which justified the need for a codification study that can provide enhanced design guidelines for overhangs and adjacent walls. A detailed discussion of the codified design guidelines, which are formed based on statistical determination rather than the enveloped procedures as commonly used, is presented in this paper.<br/></div> © 2023 Elsevier Ltd},\nkey = {Wind tunnels},\n%keywords = {Geometry;Roofs;Structural design;Walls (structural partitions);Wind stress;},\n%note = {Code of practice;Hip roofs;Low-rise buildings;Roof overhang;Roof soffit;Standards and codes;Wind induced loads;Wind load;Wind standard and code of practice;Wind-induced pressure;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.116199},\n} \n\n\n
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Recent funding opportunities for Wind Engineering research have generated a significant amount of knowledge that has the potential to both develop new or enhance existing wind standards and building codes of practice. Building codes tend to get more rigorous over time to better mitigate damage on buildings and structures. Roof overhangs which are an integral part of the roofing system in low-rise buildings, is particularly vulnerable to damage in wind events due to its exposure to wind-induced loads on both upper and lower surfaces. Large scale wind tunnel testing was carried out at the Wall of Wind (WOW) Research Experimental Facility to investigate the wind-induced loads on roof overhangs of low-rise residential buildings. The physical testing protocol included six 1:10 scaled models with varying geometrical parameters such as roof slope and roof overhang width. Peak wind pressures on both the upper and lower surfaces were measured to calculate the simultaneous net pressure coefficients along the overhangs. Area-averaged pressure analysis was carried out to investigate the pressure gradients on single or groups of taps on the overhangs, soffits, and walls. The experimentally derived area averaged GCp values were compared to previous and current versions of wind standards to evaluate their adequacy. The findings revealed that the provisions’ design guidelines are less conservative for some roofing and wall zones, which justified the need for a codification study that can provide enhanced design guidelines for overhangs and adjacent walls. A detailed discussion of the codified design guidelines, which are formed based on statistical determination rather than the enveloped procedures as commonly used, is presented in this paper.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n 3D response simulation of a bridge with a posttensioned base rocking steel pier under sequential loading of traffic loads, braking force, and earthquake excitations.\n \n \n \n \n\n\n \n Rahmzadeh, A.; Alam, M. S.; and Tremblay, R.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 52(9): 2830 - 2851. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"3DPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231714017581 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {3D response simulation of a bridge with a posttensioned base rocking steel pier under sequential loading of traffic loads, braking force, and earthquake excitations},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Rahmzadeh, Ahmad and Alam, M. Shahria and Tremblay, Robert},\nvolume = {52},\nnumber = {9},\nyear = {2023},\npages = {2830 - 2851},\nissn = {00988847},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents finite element (FE) investigations of the seismic response of a bridge incorporating a base rocking steel pier. The pier consists of a circular steel tube, circular end plates, posttensioned (PT) tendon(s), and supplemental energy dissipation devices, and is configured to rock at its interface with the foundation. The main characteristic of such a pier is its ability to ensure small residual drifts after undergoing inelastic deformations during cyclic loading. The system has a tendency to close the gap due to the presence of superstructure dead load (DL) and tendon posttensioning force. Using experimental data, the calibration of the FE procedure is done at the material, component, and global system levels. The FE model of a prototype bridge is developed with the rocking pier modelled by continuum elements while superstructure, bearing units, abutment walls and backfill material modelled by discrete elements. The analysis procedure includes the application of one or two earthquake excitations, traffic loads, and braking force. The varied parameters are the diameter-to-thickness ratio of the column, presence of a PT tendon, addition of supplemental energy dissipaters (EDs), base plate dimensions, height of ED chairs, and ED strength. The results of dynamic FE studies demonstrate that a bridge utilizing such a pier has the potential to undergo consecutive earthquakes without sustaining significant damage and return to its original position without requiring abutment component stiffness and strength.<br/></div> © 2023 The Authors. Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd.},\nkey = {Energy dissipation},\n%keywords = {Abutments (bridge);Earthquakes;Finite element method;Loads (forces);Piers;Plates (structural components);Structural dynamics;Tubular steel structures;},\n%note = {Braking force;Bridge design;Earthquake excitation;Energy dissipaters;Finite element;Non-linear dynamic analysis;Post tensioned;Rocking;Steel pier;Traffic loads;},\nURL = {http://dx.doi.org/10.1002/eqe.3898},\n} \n\n\n
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This paper presents finite element (FE) investigations of the seismic response of a bridge incorporating a base rocking steel pier. The pier consists of a circular steel tube, circular end plates, posttensioned (PT) tendon(s), and supplemental energy dissipation devices, and is configured to rock at its interface with the foundation. The main characteristic of such a pier is its ability to ensure small residual drifts after undergoing inelastic deformations during cyclic loading. The system has a tendency to close the gap due to the presence of superstructure dead load (DL) and tendon posttensioning force. Using experimental data, the calibration of the FE procedure is done at the material, component, and global system levels. The FE model of a prototype bridge is developed with the rocking pier modelled by continuum elements while superstructure, bearing units, abutment walls and backfill material modelled by discrete elements. The analysis procedure includes the application of one or two earthquake excitations, traffic loads, and braking force. The varied parameters are the diameter-to-thickness ratio of the column, presence of a PT tendon, addition of supplemental energy dissipaters (EDs), base plate dimensions, height of ED chairs, and ED strength. The results of dynamic FE studies demonstrate that a bridge utilizing such a pier has the potential to undergo consecutive earthquakes without sustaining significant damage and return to its original position without requiring abutment component stiffness and strength.
© 2023 The Authors. Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Seismic performance of RC frames with self-centering precast post-tensioned connections considering the effect of infill walls.\n \n \n \n \n\n\n \n Dai, K.; Sun, T.; Liu, Y.; Li, T.; Xu, J.; and Bezabeh, M. A.\n\n\n \n\n\n\n Soil Dynamics and Earthquake Engineering, 171. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231613896536 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic performance of RC frames with self-centering precast post-tensioned connections considering the effect of infill walls},\njournal = {Soil Dynamics and Earthquake Engineering},\nauthor = {Dai, Kaoshan and Sun, Tongfei and Liu, Ye and Li, Tao and Xu, Jun and Bezabeh, Matiyas A.},\nvolume = {171},\nyear = {2023},\nissn = {02677261},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents the seismic performance evaluation of self-centering precast post-tensioned concrete (SCPPTC) frames with infill walls. The SCPPTC connection system consists of all-steel bamboo-shaped energy dissipaters (SBED) and prestressed tendons, which provide energy dissipation capacity and self-centering capability, respectively. Using modeling parameters calibrated with experimental tests, nonlinear numerical models of SBED, SCPPTC connection, infill walls, and 2D SCPPTC frames were developed in OpenSees, to compare the performance of the structures with different types of infill wall layouts. Nonlinear static pushover and incremental dynamic analysis (IDA) were performed to study the effect of infill walls on the overall response of SCPPTC frames, in terms of stiffness, strength, maximum interstory drift ratio,θ<inf>max</inf>, the maximum residual interstory drift ratio, θ<inf>r,max</inf>, and the normalized post-tensioned force. Using the IDA results, the study also developed fragility curves and estimated the collapse margin ratios. The results demonstrated that the shear strength of the SCPPTC frame was improved from 4.19% to 12.2%, and the initial secant stiffness of the SCPPTC frame was augmented from 22.9% to 88.3% with increasing filling rate. The totally infilled SCPPTC frame (SCPPTC-ToI) exhibits a 19.86% lower θ<inf>max</inf> than that of pilotis-infilled SCPPTC frame (SCPPTC-PiI) under rare earthquakes, and the maximum prestress of SCPPTC-ToI was also 7.14% lower than that of SCPPTC-PiI. With the increase in filling rate, θ<inf>r,max</inf> increased by a maximum of 120.45%. The pronounced soft layer led to the highest failure and collapse probabilities of SCPPTC-PiI among all SCPPTC frames at the same performance level.<br/></div> © 2023 Elsevier Ltd},\nkey = {Stiffness},\n%keywords = {Energy dissipation;Infill drilling;Nonlinear analysis;Seismic waves;Seismology;},\n%note = {Fragility function;Incremental dynamic analysis;Infill walls;Nonlinear static pushover;Nonlinear statics;Post-tensioned concrete;Pre-cast;Seismic Performance;Self centering;Self-centering frame;},\nURL = {http://dx.doi.org/10.1016/j.soildyn.2023.107969},\n} \n\n\n
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This paper presents the seismic performance evaluation of self-centering precast post-tensioned concrete (SCPPTC) frames with infill walls. The SCPPTC connection system consists of all-steel bamboo-shaped energy dissipaters (SBED) and prestressed tendons, which provide energy dissipation capacity and self-centering capability, respectively. Using modeling parameters calibrated with experimental tests, nonlinear numerical models of SBED, SCPPTC connection, infill walls, and 2D SCPPTC frames were developed in OpenSees, to compare the performance of the structures with different types of infill wall layouts. Nonlinear static pushover and incremental dynamic analysis (IDA) were performed to study the effect of infill walls on the overall response of SCPPTC frames, in terms of stiffness, strength, maximum interstory drift ratio,θmax, the maximum residual interstory drift ratio, θr,max, and the normalized post-tensioned force. Using the IDA results, the study also developed fragility curves and estimated the collapse margin ratios. The results demonstrated that the shear strength of the SCPPTC frame was improved from 4.19% to 12.2%, and the initial secant stiffness of the SCPPTC frame was augmented from 22.9% to 88.3% with increasing filling rate. The totally infilled SCPPTC frame (SCPPTC-ToI) exhibits a 19.86% lower θmax than that of pilotis-infilled SCPPTC frame (SCPPTC-PiI) under rare earthquakes, and the maximum prestress of SCPPTC-ToI was also 7.14% lower than that of SCPPTC-PiI. With the increase in filling rate, θr,max increased by a maximum of 120.45%. The pronounced soft layer led to the highest failure and collapse probabilities of SCPPTC-PiI among all SCPPTC frames at the same performance level.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Characterization of the compaction and frictional behaviors of the green anode paste at various temperatures.\n \n \n \n \n\n\n \n Lacroix, O.; Chaouki, H.; Lauzon-Gauthier, J.; Alamdari, H.; and Fafard, M.\n\n\n \n\n\n\n Powder Technology, 424. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"CharacterizationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231613901061 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Characterization of the compaction and frictional behaviors of the green anode paste at various temperatures},\njournal = {Powder Technology},\nauthor = {Lacroix, Olivier and Chaouki, Hicham and Lauzon-Gauthier, Julien and Alamdari, Houshang and Fafard, Mario},\nvolume = {424},\nyear = {2023},\nissn = {00325910},\nabstract = {<div data-language="eng" data-ev-field="abstract">The aim of this work was to investigate the effect of the green anode paste temperature on its compaction behavior and on its frictional behavior with a steel mold during the anode forming process. An experimental campaign composed of monotonic compaction tests and friction tests was carried out at temperatures ranging from 130 °C to 170 °C. The compaction tests were performed with an instrumented thin-walled mold to characterize the axial and radial behaviors of the anode paste. The results highlight that the nonlinear behavior of the anode paste is significantly affected by temperature. Friction tests were performed under various normal loads to evaluate the static and kinetic friction coefficients of the paste/steel at different interface temperatures. The results bring a new insight into the behavior of the anode paste and pave the way for the development of a temperature-dependent material model of the anode paste compaction process.<br/></div> © 2023},\nkey = {Thin walled structures},\n%keywords = {Anodes;Carbon;Compaction;Friction;Molds;},\n%note = {Anode paste;Axial stress;Carbon pastes;Compaction behavior;Compaction test;Friction coefficients;Frictional behavior;Green anode paste;Green anodes;Radial stress;},\nURL = {http://dx.doi.org/10.1016/j.powtec.2023.118505},\n} \n\n\n
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The aim of this work was to investigate the effect of the green anode paste temperature on its compaction behavior and on its frictional behavior with a steel mold during the anode forming process. An experimental campaign composed of monotonic compaction tests and friction tests was carried out at temperatures ranging from 130 °C to 170 °C. The compaction tests were performed with an instrumented thin-walled mold to characterize the axial and radial behaviors of the anode paste. The results highlight that the nonlinear behavior of the anode paste is significantly affected by temperature. Friction tests were performed under various normal loads to evaluate the static and kinetic friction coefficients of the paste/steel at different interface temperatures. The results bring a new insight into the behavior of the anode paste and pave the way for the development of a temperature-dependent material model of the anode paste compaction process.
© 2023\n
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\n \n\n \n \n \n \n \n \n Theoretical model to predict the seismic drift concentration effect for self-centering-braced frame.\n \n \n \n \n\n\n \n Wang, Y.; Zhou, Z.; Xie, Y.; and Huang, L.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 207. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"TheoreticalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231613900918 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Theoretical model to predict the seismic drift concentration effect for self-centering-braced frame},\njournal = {Journal of Constructional Steel Research},\nauthor = {Wang, Yongwei and Zhou, Zhen and Xie, Yazhou and Huang, Linjie},\nvolume = {207},\nyear = {2023},\nissn = {0143974X},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study is motivated to predict such drift concentration effects for SCB frames with the perfect flag-shape hysteretic behavior. Nonlinear time history analyses are conducted to compare and elucidate different deformation mechanisms between BRB and SCB frames. An elastic-plastic static model is established to predict the static drift concentration factor (DCF<inf>S</inf>) for the SCB frame under static lateral loads, where influential parameters include the column-to-frame stiffness ratios, α, and the SCB's post-yielding stiffness ratio, β<sup>k,2</sup>. To capture the dynamic loading effect, a regressive formula is further developed as the dynamic amplification factor by normalizing the dynamic drift concentration factor (DCF<inf>D</inf>) with the DCF<inf>S</inf> under static loads. The results show that unlike BRB frames with drift concentrated in the bottom story, SCB frames often feature peak story drifts in the top story. As opposed to BRB frames, the equivalent lateral loads do not feature an inverted triangle distribution but a parabolic distribution along the building height. The drift concentration effect for the SCB frame is reliably predicted by multiplying static DCF<inf>S</inf> with the corresponding closed-form formula for the dynamic amplification factor. The predicted DCF<inf>D</inf> is also utilized to identify a design range of β<sup>k,2</sup> (i.e., 0.2–0.4) to effectively control the peak story drift and drift concentration for SCB frames.<br/></div> © 2023 Elsevier Ltd},\nkey = {Stiffness},\n%keywords = {Dynamic loads;Elastoplasticity;Forecasting;Hysteresis;Seismic response;Structural frames;},\n%note = {Braced frame;Concentration effects;Concentration factors;Drift concentration factor;Lateral loads;Post-yielding;Post-yielding stiffness;Self centering;Self-centering braced frame;Story drift;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2023.107950},\n} \n\n\n
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This study is motivated to predict such drift concentration effects for SCB frames with the perfect flag-shape hysteretic behavior. Nonlinear time history analyses are conducted to compare and elucidate different deformation mechanisms between BRB and SCB frames. An elastic-plastic static model is established to predict the static drift concentration factor (DCFS) for the SCB frame under static lateral loads, where influential parameters include the column-to-frame stiffness ratios, α, and the SCB's post-yielding stiffness ratio, βk,2. To capture the dynamic loading effect, a regressive formula is further developed as the dynamic amplification factor by normalizing the dynamic drift concentration factor (DCFD) with the DCFS under static loads. The results show that unlike BRB frames with drift concentrated in the bottom story, SCB frames often feature peak story drifts in the top story. As opposed to BRB frames, the equivalent lateral loads do not feature an inverted triangle distribution but a parabolic distribution along the building height. The drift concentration effect for the SCB frame is reliably predicted by multiplying static DCFS with the corresponding closed-form formula for the dynamic amplification factor. The predicted DCFD is also utilized to identify a design range of βk,2 (i.e., 0.2–0.4) to effectively control the peak story drift and drift concentration for SCB frames.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Shear design of RC members strengthened with steel reinforcing bars embedded through section.\n \n \n \n \n\n\n \n Fiset, M.; Bastien, J.; and Mitchell, D.\n\n\n \n\n\n\n Engineering Structures, 285. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ShearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231513877254 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shear design of RC members strengthened with steel reinforcing bars embedded through section},\njournal = {Engineering Structures},\nauthor = {Fiset, M. and Bastien, J. and Mitchell, D.},\nvolume = {285},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">The shear strengthening technique investigated in this paper consists of inserting steel reinforcing bars into holes drilled into a shear-deficient existing concrete member and bonding these bars to the concrete with high-strength epoxy adhesive. It is important to realize that current shear design methods are applicable to RC members with conventional stirrups and hence overestimate the shear capacity of members with epoxy-bonded bars. In order to overcome this difficulty, a shear design method for RC members strengthened with epoxy-bonded shear reinforcement is presented. The proposed method was developed considering the development of epoxy-bonded bars as well as the effect of crack width and aggregate interlock on shear capacity. The predicted shear capacities were compared with beam test results and provide accurate predictions.<br/></div> © 2023 Elsevier Ltd},\nkey = {Reinforced concrete},\n%keywords = {Adhesives;Bars (metal);Design;Shear flow;Shear strength;Strengthening (metal);},\n%note = {Analytical modeling;Bond characteristics;Epoxy;RC member;Shear capacity;Shear design;Shear strengthening;Shears strength;Steel bar embedded-through-section;Steel bars;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.116050},\n} \n\n\n
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The shear strengthening technique investigated in this paper consists of inserting steel reinforcing bars into holes drilled into a shear-deficient existing concrete member and bonding these bars to the concrete with high-strength epoxy adhesive. It is important to realize that current shear design methods are applicable to RC members with conventional stirrups and hence overestimate the shear capacity of members with epoxy-bonded bars. In order to overcome this difficulty, a shear design method for RC members strengthened with epoxy-bonded shear reinforcement is presented. The proposed method was developed considering the development of epoxy-bonded bars as well as the effect of crack width and aggregate interlock on shear capacity. The predicted shear capacities were compared with beam test results and provide accurate predictions.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Estimation of Aquifer Storativity Using 3D Geological Modeling and the Spatial Random Bagging Simulation Method: The Saskatchewan River Basin Case Study (Central Canada).\n \n \n \n \n\n\n \n Hamdi, M.; and Goita, K.\n\n\n \n\n\n\n Water (Switzerland), 15(6). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"EstimationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231513865585 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Estimation of Aquifer Storativity Using 3D Geological Modeling and the Spatial Random Bagging Simulation Method: The Saskatchewan River Basin Case Study (Central Canada)},\njournal = {Water (Switzerland)},\nauthor = {Hamdi, Mohamed and Goita, Kalifa},\nvolume = {15},\nnumber = {6},\nyear = {2023},\nissn = {20734441},\nabstract = {<div data-language="eng" data-ev-field="abstract">Hydrosystems in the Saskatchewan River Basin of the Canadian Prairies are subject to natural and socioeconomic pressures. Increasingly, these strong pressures are exacerbating problems of water resource accessibility and depletion. Unfortunately, the geometric heterogeneity of the aquifers and the presence of lithologically varied layers complicate groundwater flow studies, hydrodynamic characterization, and aquifer storativity calculations. Moreover, in recent hydrogeological studies, hydraulic conductivity has been the subject of much more research than storativity. It is in this context that the present research was conducted, to establish a 3D hydrostratigraphic model that highlights the geological (lithology, thickness, and depth) and hydrodynamic characteristics of the aquifer formations and proposes a new uncertainty framework for groundwater storage estimation. The general methodology is based on collecting and processing a very fragmentary and diverse multi-source database to develop the conceptual model. Data were harmonized and entered into a common database management system. A large quantity of geological information has been implemented in a 3D hydrostratigraphic model to establish the finest geometry of the SRB aquifers. Then, the different sources of uncertainty were controlled and considered in the modeling process by developing a randomized modeling system based on spatial random bagging simulation (SRBS). The results of the research show the following: Firstly, the distribution of aquifer levels is controlled by tectonic activity and erosion, which further suggests that most buried valleys on the Prairies have filled over time, likely during multiple glaciations in several depositional environments. Secondly, the geostatistical study allowed us to choose optimal interpolation variographic parameters. Finally, the final storativity maps of the different aquifer formations showed a huge potential of groundwater in SRB. The SRBS method allowed us to calculate the optimal storativity values for each mesh and to obtain a final storativity map for each formation. For example, for the Paskapoo Formation, the distribution grid of groundwater storage shows that the east part of the aquifer can store up to 5920 × 10<sup>3</sup> m<sup>3</sup>/voxel, whereas most areas of the west aquifer part can only store less than 750 × 10<sup>3</sup> m<sup>3</sup>/voxel. The maximum storativity was attributed to the Horseshoe Canyon Formation, which contains maximal geological reserves ranging from 107 to 111 × 10<sup>9</sup> m<sup>3</sup>. The main contribution of this research is the proposed 3D geological model with hydrogeological insights into the study area, as well as the use of a new statistical method to propagate the uncertainty over the modeling domain. The next step will focus on the hydrodynamic modeling of groundwater flow to better manage water resources in the Saskatchewan River Basin.<br/></div> © 2023 by the authors.},\nkey = {Aquifers},\n%keywords = {3D modeling;Digital storage;Groundwater flow;Groundwater resources;Hydrodynamics;Hydrogeology;Information management;Lithology;Rivers;Uncertainty analysis;Water management;Watersheds;},\n%note = {3D geological modeling;Groundwater storage;Hydrogeological;River basins;Saskatchewan;Saskatchewan river basin;Spatial random bagging simulation;Storativity;Uncertainty;Waters resources;},\nURL = {http://dx.doi.org/10.3390/w15061156},\n} \n\n\n
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Hydrosystems in the Saskatchewan River Basin of the Canadian Prairies are subject to natural and socioeconomic pressures. Increasingly, these strong pressures are exacerbating problems of water resource accessibility and depletion. Unfortunately, the geometric heterogeneity of the aquifers and the presence of lithologically varied layers complicate groundwater flow studies, hydrodynamic characterization, and aquifer storativity calculations. Moreover, in recent hydrogeological studies, hydraulic conductivity has been the subject of much more research than storativity. It is in this context that the present research was conducted, to establish a 3D hydrostratigraphic model that highlights the geological (lithology, thickness, and depth) and hydrodynamic characteristics of the aquifer formations and proposes a new uncertainty framework for groundwater storage estimation. The general methodology is based on collecting and processing a very fragmentary and diverse multi-source database to develop the conceptual model. Data were harmonized and entered into a common database management system. A large quantity of geological information has been implemented in a 3D hydrostratigraphic model to establish the finest geometry of the SRB aquifers. Then, the different sources of uncertainty were controlled and considered in the modeling process by developing a randomized modeling system based on spatial random bagging simulation (SRBS). The results of the research show the following: Firstly, the distribution of aquifer levels is controlled by tectonic activity and erosion, which further suggests that most buried valleys on the Prairies have filled over time, likely during multiple glaciations in several depositional environments. Secondly, the geostatistical study allowed us to choose optimal interpolation variographic parameters. Finally, the final storativity maps of the different aquifer formations showed a huge potential of groundwater in SRB. The SRBS method allowed us to calculate the optimal storativity values for each mesh and to obtain a final storativity map for each formation. For example, for the Paskapoo Formation, the distribution grid of groundwater storage shows that the east part of the aquifer can store up to 5920 × 103 m3/voxel, whereas most areas of the west aquifer part can only store less than 750 × 103 m3/voxel. The maximum storativity was attributed to the Horseshoe Canyon Formation, which contains maximal geological reserves ranging from 107 to 111 × 109 m3. The main contribution of this research is the proposed 3D geological model with hydrogeological insights into the study area, as well as the use of a new statistical method to propagate the uncertainty over the modeling domain. The next step will focus on the hydrodynamic modeling of groundwater flow to better manage water resources in the Saskatchewan River Basin.
© 2023 by the authors.\n
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\n \n\n \n \n \n \n \n \n LSTM, WaveNet, and 2D CNN for nonlinear time history prediction of seismic responses.\n \n \n \n \n\n\n \n Ning, C.; Xie, Y.; and Sun, L.\n\n\n \n\n\n\n Engineering Structures, 286. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"LSTM,Paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231513878437 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {LSTM, WaveNet, and 2D CNN for nonlinear time history prediction of seismic responses},\njournal = {Engineering Structures},\nauthor = {Ning, Chunxiao and Xie, Yazhou and Sun, Lijun},\nvolume = {286},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Predicting the nonlinear time-history responses of civil engineering structures under seismic loading remains an essential task in earthquake engineering. This paper explores the promise of developing three deep learning (DL) models, i.e., long short-term memory (LSTM), WaveNet, and 2D convolution neural network (CNN), to predict seismic response time histories of three benchmark structures, including a single degree-of-freedom (SDOF) system, a steel building frame, and a multi-component bridge structure. LSTM has been previously developed and is utilized to serve as a reference model, while WaveNet and 2D CNN (i.e., it deals with the data in coupled time–frequency dimensions) are newly developed in the current study. One other novel contribution is to replace the final layer of the WaveNet with an LSTM layer, which significantly improves the model performance. Methodological backgrounds of these DL models are introduced, followed by discussions on model architectures and hyperparameters, the list of evaluation metrics, and the ground motion (GM) suite selected for data generation. High-fidelity numerical models are developed for conducting nonlinear time history analyses that generate numerous motion-response pairs for training, validating, and testing the DL models. The LSTM and WaveNet directly use time series GM inputs and seismic response outputs to train the models, whereas the CNN makes inferences on time–frequency spectrogram images converted through the short-time Fourier transform (STFT). These three DL models are investigated by comparing deterministic predictions under one testing GM and probabilistic distributions of six evaluation metrics. The models’ accuracy, efficiency, and robustness are further examined using a sensitivity study under different training samples and model architectures. Research findings from this study provide a sound reference for the community to leverage these three DL models to achieve reliable and efficient time history response predictions, which are crucial for fulfilling cutting-edge research/practical tasks such as regional seismic risk assessment and performance-based seismic design.<br/></div> © 2023 Elsevier Ltd},\nkey = {Forecasting},\n%keywords = {Degrees of freedom (mechanics);Fourier series;Long short-term memory;Network architecture;Probability distributions;Risk assessment;Seismic design;Seismic response;Seismic waves;Time series analysis;},\n%note = {2-D convolution;Convolution neural network;Deep learning;Ground-motion;Learning models;Modeling architecture;Nonlinear time history;Nonlinear time history prediction;Time history response;Wavenet;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.116083},\n} \n\n\n
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Predicting the nonlinear time-history responses of civil engineering structures under seismic loading remains an essential task in earthquake engineering. This paper explores the promise of developing three deep learning (DL) models, i.e., long short-term memory (LSTM), WaveNet, and 2D convolution neural network (CNN), to predict seismic response time histories of three benchmark structures, including a single degree-of-freedom (SDOF) system, a steel building frame, and a multi-component bridge structure. LSTM has been previously developed and is utilized to serve as a reference model, while WaveNet and 2D CNN (i.e., it deals with the data in coupled time–frequency dimensions) are newly developed in the current study. One other novel contribution is to replace the final layer of the WaveNet with an LSTM layer, which significantly improves the model performance. Methodological backgrounds of these DL models are introduced, followed by discussions on model architectures and hyperparameters, the list of evaluation metrics, and the ground motion (GM) suite selected for data generation. High-fidelity numerical models are developed for conducting nonlinear time history analyses that generate numerous motion-response pairs for training, validating, and testing the DL models. The LSTM and WaveNet directly use time series GM inputs and seismic response outputs to train the models, whereas the CNN makes inferences on time–frequency spectrogram images converted through the short-time Fourier transform (STFT). These three DL models are investigated by comparing deterministic predictions under one testing GM and probabilistic distributions of six evaluation metrics. The models’ accuracy, efficiency, and robustness are further examined using a sensitivity study under different training samples and model architectures. Research findings from this study provide a sound reference for the community to leverage these three DL models to achieve reliable and efficient time history response predictions, which are crucial for fulfilling cutting-edge research/practical tasks such as regional seismic risk assessment and performance-based seismic design.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Identification methods of material-based damping for cracked reinforced concrete beam models.\n \n \n \n \n\n\n \n Chambreuil, C.; Giry, C.; Ragueneau, F.; and Leger, P.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 52(7): 2156 - 2178. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"IdentificationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231313803342 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Identification methods of material-based damping for cracked reinforced concrete beam models},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Chambreuil, Clotilde and Giry, Cedric and Ragueneau, Frederic and Leger, Pierre},\nvolume = {52},\nnumber = {7},\nyear = {2023},\npages = {2156 - 2178},\nissn = {00988847},\nabstract = {<div data-language="eng" data-ev-field="abstract">Seismic performance evaluation in structural design requires the use of sophisticated numerical models. In particular, to accurately represent the non-linear behaviour of reinforced concrete (RC) structures when subjected to dynamic loadings, the energy dissipation mechanisms must be accurately represented. However, the classical viscous damping models, which are still widely used, are not based on physical considerations at the material level and the choice of damping parameters is often arbitrary. This paper, thus, proposes a time-domain damping identification method based on equivalent single-degree-of-freedom (SDOF) systems. The methodology is developed using either an updated linear model or a non-linear energy-dissipating constitutive model. Energy dissipative phenomena are cracking, friction and unilateral effects upon crack closure. Both models allow the identification of different damping transient variations: (i) With the updated linear model, intrinsic damping ratios and frequencies are identified to define a simple generic damping model, and (ii) with the non-linear constitutive model, the identified viscous damping ratios represent the dissipative phenomena not described by the material model. The aim is to propose simple models that can be used by anyone to complement their own models. Applying the method to experimental data allows evaluating effective damping ratio transient variations as functions of variables representative of non-linear behaviour. It is shown that it is possible to accurately model the energy dissipation that is missing in the non-linear dynamic constitutive models through effective viscous damping models based on dissipative phenomena internal variables.<br/></div> © 2023 The Authors. Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd.},\nkey = {Energy dissipation},\n%keywords = {Concrete beams and girders;Constitutive models;Crack closure;Damping;Degrees of freedom (mechanics);Ductile fracture;Dynamic loads;Dynamics;Reinforced concrete;Structural dynamics;Time domain analysis;},\n%note = {Beam;Damping identification;Damping ratio;Dissipative phenomenon;Identification method;Linear modeling;Non linear;Non-linear modelling;Nonlinear behaviours;Viscous damping model;},\nURL = {http://dx.doi.org/10.1002/eqe.3875},\n} \n\n\n
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Seismic performance evaluation in structural design requires the use of sophisticated numerical models. In particular, to accurately represent the non-linear behaviour of reinforced concrete (RC) structures when subjected to dynamic loadings, the energy dissipation mechanisms must be accurately represented. However, the classical viscous damping models, which are still widely used, are not based on physical considerations at the material level and the choice of damping parameters is often arbitrary. This paper, thus, proposes a time-domain damping identification method based on equivalent single-degree-of-freedom (SDOF) systems. The methodology is developed using either an updated linear model or a non-linear energy-dissipating constitutive model. Energy dissipative phenomena are cracking, friction and unilateral effects upon crack closure. Both models allow the identification of different damping transient variations: (i) With the updated linear model, intrinsic damping ratios and frequencies are identified to define a simple generic damping model, and (ii) with the non-linear constitutive model, the identified viscous damping ratios represent the dissipative phenomena not described by the material model. The aim is to propose simple models that can be used by anyone to complement their own models. Applying the method to experimental data allows evaluating effective damping ratio transient variations as functions of variables representative of non-linear behaviour. It is shown that it is possible to accurately model the energy dissipation that is missing in the non-linear dynamic constitutive models through effective viscous damping models based on dissipative phenomena internal variables.
© 2023 The Authors. Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n A Remote Sensing View of the 2020 Extreme Lake-Expansion Flood Event into the Peace–Athabasca Delta Floodplain—Implications for the Future SWOT Mission.\n \n \n \n \n\n\n \n Desrochers, N. M.; Peters, D. L.; Siles, G.; Cauvier Charest, E.; Trudel, M.; and Leconte, R.\n\n\n \n\n\n\n Remote Sensing, 15(5). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231113740088 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Remote Sensing View of the 2020 Extreme Lake-Expansion Flood Event into the Peace–Athabasca Delta Floodplain—Implications for the Future SWOT Mission},\njournal = {Remote Sensing},\nauthor = {Desrochers, Nicolas M. and Peters, Daniel L. and Siles, Gabriela and Cauvier Charest, Elizabeth and Trudel, Melanie and Leconte, Robert},\nvolume = {15},\nnumber = {5},\nyear = {2023},\nissn = {20724292},\nabstract = {<div data-language="eng" data-ev-field="abstract">The Peace–Athabasca Delta (PAD) in western Canada is one of the largest inland deltas in the world. Flooding caused by the expansion of lakes beyond normal shorelines occurred during the summer of 2020 and provided a unique opportunity to evaluate the capabilities of remote sensing platforms to map surface water expansion into vegetated landscape with complex surface connectivity. Firstly, multi-source remotely sensed data via satellites were used to create a temporal reconstruction of the event spanning May to September. Optical synthetic aperture radar (SAR) and altimeter data were used to reconstruct surface water area and elevation as seen from space. Lastly, temporal water surface area and level data obtained from the existing satellites and hydrometric stations were used as input data in the CNES Large-Scale SWOT Simulator, which provided an overview of the newly launched SWOT satellite ability to monitor such flood events. The results show a 25% smaller water surface area for optical instruments compared to SAR. Simulations show that SWOT would have greatly increased the spatio-temporal understanding of the flood dynamics with complete PAD coverage three to four times per month. Overall, seasonal vegetation growth was a major obstacle for water surface area retrieval, especially for optical sensors.<br/></div> © 2023 by the authors.},\nkey = {Synthetic aperture radar},\n%keywords = {Aneroid altimeters;Expansion;Floods;Lakes;Meteorological instruments;Optical remote sensing;Satellites;Space optics;Space-based radar;},\n%note = {Flood event;Flood monitoring;Flood plains;Flood surface area;Optical-;Peace-athabasca deltas;Remote-sensing;Surface area;SWOT;Water surface;},\nURL = {http://dx.doi.org/10.3390/rs15051278},\n} \n\n\n
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The Peace–Athabasca Delta (PAD) in western Canada is one of the largest inland deltas in the world. Flooding caused by the expansion of lakes beyond normal shorelines occurred during the summer of 2020 and provided a unique opportunity to evaluate the capabilities of remote sensing platforms to map surface water expansion into vegetated landscape with complex surface connectivity. Firstly, multi-source remotely sensed data via satellites were used to create a temporal reconstruction of the event spanning May to September. Optical synthetic aperture radar (SAR) and altimeter data were used to reconstruct surface water area and elevation as seen from space. Lastly, temporal water surface area and level data obtained from the existing satellites and hydrometric stations were used as input data in the CNES Large-Scale SWOT Simulator, which provided an overview of the newly launched SWOT satellite ability to monitor such flood events. The results show a 25% smaller water surface area for optical instruments compared to SAR. Simulations show that SWOT would have greatly increased the spatio-temporal understanding of the flood dynamics with complete PAD coverage three to four times per month. Overall, seasonal vegetation growth was a major obstacle for water surface area retrieval, especially for optical sensors.
© 2023 by the authors.\n
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\n \n\n \n \n \n \n \n \n Experimental and numerical study on the crack width and deflection performance of GFRP reinforced concrete beams.\n \n \n \n \n\n\n \n Gouda, O.; Hassanein, A.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 283. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231113703391 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental and numerical study on the crack width and deflection performance of GFRP reinforced concrete beams},\njournal = {Engineering Structures},\nauthor = {Gouda, Omar and Hassanein, Ahmed and Galal, Khaled},\nvolume = {283},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">The design of glass fiber-reinforced polymer (GFRP) reinforced concrete (RC) members is often governed by the crack width and deflection serviceability limits due to the low elastic modulus of GFRP material compared to steel. The available formulations in the current standards and guidelines control the crack widths of the GFRP-RC elements by considering the bond interaction between the GFRP reinforcement and surrounding concrete through bond-dependent coefficient, k<inf>b</inf>. This study investigates the effect of different parameters, including the concrete compressive strength, clear concrete cover to GFRP reinforcement, and the number of GFRP reinforcement layers on the moment capacity, cracking progression, deflection behavior, and the variation of k<inf>b</inf> values at different crack widths. The study involves experimentally testing 11 full-scale GFRP-RC beams. Moreover, a numerical parametric model was developed to investigate the effect of varying the concrete strength on the deflection performance of the GFRP-RC beams. The experimental results provided insights into how the investigated parameters impact the crack width and deflection values at the service stage. Moreover, the numerical model simulated the experimental behavior of the beams with high accuracy. It was also found that the ACI 440.1R-15 deflection formulation underestimates the deflection values at the service stage, particularly at high concrete strengths.<br/></div> © 2023 Elsevier Ltd},\nkey = {Steel fibers},\n%keywords = {Compressive strength;Concrete beams and girders;Deflection (structures);Ductile fracture;Fiber reinforced concrete;Fiber reinforced plastics;Finite element method;Glass fibers;Numerical models;},\n%note = {Crack-width;Cracks deflections;Deflection;Element models;Finite element modeling;Glass fiber-reinforced polymer reinforcement;Glassfiber reinforced polymers (GFRP);Model validation;Parametric study;Polymer reinforcements;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.115721},\n} \n\n\n
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The design of glass fiber-reinforced polymer (GFRP) reinforced concrete (RC) members is often governed by the crack width and deflection serviceability limits due to the low elastic modulus of GFRP material compared to steel. The available formulations in the current standards and guidelines control the crack widths of the GFRP-RC elements by considering the bond interaction between the GFRP reinforcement and surrounding concrete through bond-dependent coefficient, kb. This study investigates the effect of different parameters, including the concrete compressive strength, clear concrete cover to GFRP reinforcement, and the number of GFRP reinforcement layers on the moment capacity, cracking progression, deflection behavior, and the variation of kb values at different crack widths. The study involves experimentally testing 11 full-scale GFRP-RC beams. Moreover, a numerical parametric model was developed to investigate the effect of varying the concrete strength on the deflection performance of the GFRP-RC beams. The experimental results provided insights into how the investigated parameters impact the crack width and deflection values at the service stage. Moreover, the numerical model simulated the experimental behavior of the beams with high accuracy. It was also found that the ACI 440.1R-15 deflection formulation underestimates the deflection values at the service stage, particularly at high concrete strengths.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Computational wind engineering: 30 years of research progress in building structures and environment.\n \n \n \n \n\n\n \n Potsis, T.; Tominaga, Y.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 234. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ComputationalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231113730841 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Computational wind engineering: 30 years of research progress in building structures and environment},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Potsis, Theodore and Tominaga, Yoshihide and Stathopoulos, Ted},\nvolume = {234},\nyear = {2023},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">The paper reviews the evolution of computational wind engineering from environmental and structural perspectives, since the inaugural conference of computational wind engineering held in Tokyo 30 years ago (CWE 92). The progress in computational methodologies and important aspects for accurate analysis are discussed. As a groundwork for the application of computational fluid dynamics (CFD) to various environmental issues, the importance of accurate modeling of atmospheric boundary layer, urban boundary layer, and urban canopy layer is pronounced. Environmental applications refer to urban micro-climate, pedestrian level wind, near-field pollutant dispersion, natural and urban ventilation, urban wind energy and snow/sand erosion and accumulation. Structural applications refer to wind loading on low- and high-rise buildings, including wind directionality. The most seminal contributions are examined, and their results are presented. It becomes clear that the engineering community has gained more benefits from environmental than structural computational wind engineering applications, mainly due to the usually less demanding computational needs for the former. Future challenges in CFD applications are thoroughly discussed and the need to bridge the gap between environmental and structural applications is highlighted.<br/></div> © 2023 Elsevier Ltd},\nkey = {Computational fluid dynamics},\n%keywords = {Atmospheric boundary layer;Atmospheric movements;Structural design;Tall buildings;Wind power;},\n%note = {Building environment;Building structure;Computational wind engineering;Environmental applications;Environmental wind engineering;In-buildings;Structural applications;Structural wind engineerings;Wind engineering;Wind load;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2023.105346},\n} \n\n\n
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The paper reviews the evolution of computational wind engineering from environmental and structural perspectives, since the inaugural conference of computational wind engineering held in Tokyo 30 years ago (CWE 92). The progress in computational methodologies and important aspects for accurate analysis are discussed. As a groundwork for the application of computational fluid dynamics (CFD) to various environmental issues, the importance of accurate modeling of atmospheric boundary layer, urban boundary layer, and urban canopy layer is pronounced. Environmental applications refer to urban micro-climate, pedestrian level wind, near-field pollutant dispersion, natural and urban ventilation, urban wind energy and snow/sand erosion and accumulation. Structural applications refer to wind loading on low- and high-rise buildings, including wind directionality. The most seminal contributions are examined, and their results are presented. It becomes clear that the engineering community has gained more benefits from environmental than structural computational wind engineering applications, mainly due to the usually less demanding computational needs for the former. Future challenges in CFD applications are thoroughly discussed and the need to bridge the gap between environmental and structural applications is highlighted.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Climate change effects on loss assessment and mitigation of residential buildings due to hurricane wind.\n \n \n \n \n\n\n \n Snaiki, R.; and Parida, S. S.\n\n\n \n\n\n\n Journal of Building Engineering, 69. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ClimatePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231113737155 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Climate change effects on loss assessment and mitigation of residential buildings due to hurricane wind},\njournal = {Journal of Building Engineering},\nauthor = {Snaiki, Reda and Parida, Siddharth S.},\nvolume = {69},\nyear = {2023},\nissn = {23527102},\nabstract = {<div data-language="eng" data-ev-field="abstract">Hurricanes are considered as one of the most devastating natural hazards. Their induced risk is expected to significantly increase with the changing climate conditions. Residential buildings are specifically highly vulnerable to hurricane winds. Therefore, accurate assessment of hurricane induced losses under changing climate conditions is crucial to assist in the development of the best mitigation strategies. In this paper, a stochastic hurricane risk assessment framework accounting for several climate scenarios is developed to assess the hurricane-induced losses of residential buildings located in hurricane-prone regions. Specifically, a total of 10,000 years of synthetic storms will be generated for both ‘observed climate’ and ‘future climate’. The future climate models correspond to the worst-case scenario SSP5-8.5 and are simulated based on two global climate models. Then a physics-based wind model is coupled with the synthetic tracks to generate the hazard probabilities. To accurately capture the upper tail effects, the Gaussian kernel density estimation function is proposed in this study. The effects of the variability of climate change models on the wind hazard and its induced losses are quantitatively evaluated. The average annual regional loss is selected as the decision variable. The framework is applied to a one-story single-family wood frame residential building in three different cities, namely Atlantic City, Miami and Galveston. Three mitigation strategies are evaluated, with varying degrees of structural mitigation, by comparing the corresponding losses incurred under different climate change scenarios. It is shown that, due to the disproportionate variation of hurricane intensity and frequency over the coastal areas, the estimated annual losses with the consideration of several mitigation strategies change unevenly from one location to another. Also, the selection of inappropriate probability density function to estimate the wind distribution might underestimate the hurricane-induced loss which is mainly due to its incapability to accurately capture the upper tail ends of the wind distribution.<br/></div> © 2023 Elsevier Ltd},\nkey = {Risk analysis},\n%keywords = {Climate change;Climate models;Hazards;Housing;Hurricanes;Probability density function;Probability distributions;Risk assessment;Risk perception;Stochastic systems;},\n%note = {Annual loss;Changing climate;Climate condition;Future climate;Induced loss;Mitigation;Mitigation strategy;Natural hazard;Residential building;Wind distribution;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2023.106256},\n} \n\n\n
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Hurricanes are considered as one of the most devastating natural hazards. Their induced risk is expected to significantly increase with the changing climate conditions. Residential buildings are specifically highly vulnerable to hurricane winds. Therefore, accurate assessment of hurricane induced losses under changing climate conditions is crucial to assist in the development of the best mitigation strategies. In this paper, a stochastic hurricane risk assessment framework accounting for several climate scenarios is developed to assess the hurricane-induced losses of residential buildings located in hurricane-prone regions. Specifically, a total of 10,000 years of synthetic storms will be generated for both ‘observed climate’ and ‘future climate’. The future climate models correspond to the worst-case scenario SSP5-8.5 and are simulated based on two global climate models. Then a physics-based wind model is coupled with the synthetic tracks to generate the hazard probabilities. To accurately capture the upper tail effects, the Gaussian kernel density estimation function is proposed in this study. The effects of the variability of climate change models on the wind hazard and its induced losses are quantitatively evaluated. The average annual regional loss is selected as the decision variable. The framework is applied to a one-story single-family wood frame residential building in three different cities, namely Atlantic City, Miami and Galveston. Three mitigation strategies are evaluated, with varying degrees of structural mitigation, by comparing the corresponding losses incurred under different climate change scenarios. It is shown that, due to the disproportionate variation of hurricane intensity and frequency over the coastal areas, the estimated annual losses with the consideration of several mitigation strategies change unevenly from one location to another. Also, the selection of inappropriate probability density function to estimate the wind distribution might underestimate the hurricane-induced loss which is mainly due to its incapability to accurately capture the upper tail ends of the wind distribution.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Fire local stability of steel I-sections under simple load cases.\n \n \n \n \n\n\n \n Li, L.; Paquet, J.; Couto, C.; Real, P. V.; and Boissonnade, N.\n\n\n \n\n\n\n Engineering Structures, 283. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"FirePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231013677191 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Fire local stability of steel I-sections under simple load cases},\njournal = {Engineering Structures},\nauthor = {Li, Liya and Paquet, Jeanne and Couto, Carlos and Real, Paulo Vila and Boissonnade, Nicolas},\nvolume = {283},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">The local buckling behavior of hot-rolled and welded I-sections under simple load cases at elevated temperatures is investigated numerically through extensive numerical analysis. Advanced shell Finite Element (F.E.) models are firstly developed and validated against existing experimental data for I-sections under fire conditions and then further used to carry out extensive parametric studies in order to consider a wide range of cross-section geometries, steel grades and temperatures. The reference F.E. results are subsequently compared with resistances predicted by the current European provisions. It is shown that these design provisions, which rely on similar cross-section classification and on the Effective Width Method (E.W.M.) just as room temperature rules, provide over-conservative and scattered resistance predictions to various extents. Therefore, an alternative design method – the Overall Interaction Concept (O.I·C.) – is proposed in this paper for I-sections at elevated temperatures. The O.I.C. is evidenced to provide more accurate, consistent and straightforward resistance predictions than current standards. Eventually, the reliability level of the O.I.C.-based proposals and of the current European provisions is evaluated.<br/></div> © 2023 Elsevier Ltd},\nkey = {Buckling},\n%keywords = {Hot rolled steel;Hot rolling;Room temperature;},\n%note = {'current;Elevated temperature;I-sections;Interaction concepts;Local buckling;Local stability;Overall interaction concept;Simple load case;Simple++;Steel I-section;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.115874},\n} \n\n\n
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The local buckling behavior of hot-rolled and welded I-sections under simple load cases at elevated temperatures is investigated numerically through extensive numerical analysis. Advanced shell Finite Element (F.E.) models are firstly developed and validated against existing experimental data for I-sections under fire conditions and then further used to carry out extensive parametric studies in order to consider a wide range of cross-section geometries, steel grades and temperatures. The reference F.E. results are subsequently compared with resistances predicted by the current European provisions. It is shown that these design provisions, which rely on similar cross-section classification and on the Effective Width Method (E.W.M.) just as room temperature rules, provide over-conservative and scattered resistance predictions to various extents. Therefore, an alternative design method – the Overall Interaction Concept (O.I·C.) – is proposed in this paper for I-sections at elevated temperatures. The O.I.C. is evidenced to provide more accurate, consistent and straightforward resistance predictions than current standards. Eventually, the reliability level of the O.I.C.-based proposals and of the current European provisions is evaluated.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Symmetric and Asymmetric Strengthening of Two-Span RC Beams Using FRCM Systems.\n \n \n \n \n\n\n \n Mandor, A.; and El Refai, A.\n\n\n \n\n\n\n Journal of Composites for Construction, 27(2). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"SymmetricPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230813608454 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Symmetric and Asymmetric Strengthening of Two-Span RC Beams Using FRCM Systems},\njournal = {Journal of Composites for Construction},\nauthor = {Mandor, Ahmed and El Refai, Ahmed},\nvolume = {27},\nnumber = {2},\nyear = {2023},\nissn = {10900268},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper reports on the feasibility of using fabric-reinforced cementitious matrix (FRCM) systems to strengthen two-span reinforced concrete (RC) beams that are structurally deficient in their sagging regions. In addition to one unstrengthened control beam, nine beams strengthened either symmetrically or asymmetrically with polyparaphenylene benzobisoxazole (PBOFRCM), carbon (CFRCM), and carbon fiber-reinforced polymer (CFRP) sheets were tested under a five-point load configuration. Test results showed that increasing the strengthening ratio resulted in significant increases in the yielding and load-carrying capacity of the beams. Beams symmetrically strengthened with PBOFRCM showed high ductility indices ranging between 100% and 121% of that of the control beam, whereas those strengthened with CFRCM and CFRP showed ductility indices of 45% and 34% of that of the control beam, respectively. Moreover, beams symmetrically strengthened with PBOFRCM systems encountered moment redistribution ratios between 42% and 82% of that of the control beam compared with 10% and 9% only for those strengthened with CFRCM and CFRP systems, respectively. The asymmetric strengthening configuration in which FRCM systems were used along with CFRP sheets proved to be an efficient method to enhance the ductility and moment redistribution capacity of the strengthened beams. Analytically, the rigid-body-rotation approach was modified to predict the moments and curvatures at the plastic hinges of the strengthened sections. The predicted moments and curvatures showed a notable agreement with the experimental values.<br/></div> © 2023 American Society of Civil Engineers.},\nkey = {Ductility},\n%keywords = {Carbon fiber reinforced plastics;Concrete beams and girders;Reinforced concrete;Rigid structures;},\n%note = {Asymmetric strengthening;Cementitious matrices;Continuous beams;Fabric-reinforced cementitious matrix;Flexure;Moment redistribution;Rigid body rotation;Rotational capacity;Strengthening;Textile-reinforced mortars;},\nURL = {http://dx.doi.org/10.1061/JCCOF2.CCENG-3975},\n} \n\n\n
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This paper reports on the feasibility of using fabric-reinforced cementitious matrix (FRCM) systems to strengthen two-span reinforced concrete (RC) beams that are structurally deficient in their sagging regions. In addition to one unstrengthened control beam, nine beams strengthened either symmetrically or asymmetrically with polyparaphenylene benzobisoxazole (PBOFRCM), carbon (CFRCM), and carbon fiber-reinforced polymer (CFRP) sheets were tested under a five-point load configuration. Test results showed that increasing the strengthening ratio resulted in significant increases in the yielding and load-carrying capacity of the beams. Beams symmetrically strengthened with PBOFRCM showed high ductility indices ranging between 100% and 121% of that of the control beam, whereas those strengthened with CFRCM and CFRP showed ductility indices of 45% and 34% of that of the control beam, respectively. Moreover, beams symmetrically strengthened with PBOFRCM systems encountered moment redistribution ratios between 42% and 82% of that of the control beam compared with 10% and 9% only for those strengthened with CFRCM and CFRP systems, respectively. The asymmetric strengthening configuration in which FRCM systems were used along with CFRP sheets proved to be an efficient method to enhance the ductility and moment redistribution capacity of the strengthened beams. Analytically, the rigid-body-rotation approach was modified to predict the moments and curvatures at the plastic hinges of the strengthened sections. The predicted moments and curvatures showed a notable agreement with the experimental values.
© 2023 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Multi-objective optimization for the sustainability of infrastructure projects under the influence of climate change.\n \n \n \n \n\n\n \n Zhang, Y.; Chouinard, L. E.; Power, G. J.; Conciatori, D.; Sasai, K.; and Bah, A. S.\n\n\n \n\n\n\n Sustainable and Resilient Infrastructure, 8(5): 492 - 513. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"Multi-objectivePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230813614043 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Multi-objective optimization for the sustainability of infrastructure projects under the influence of climate change},\njournal = {Sustainable and Resilient Infrastructure},\nauthor = {Zhang, Yan and Chouinard, Luc E. and Power, Gabriel J. and Conciatori, David and Sasai, Kotaro and Bah, Abdoul S.},\nvolume = {8},\nnumber = {5},\nyear = {2023},\npages = {492 - 513},\nissn = {23789689},\nabstract = {<div data-language="eng" data-ev-field="abstract">Infrastructure asset management is concerned with the efficient and sustainable utilization of resources. There are numerous sources of uncertainties associated with the physical state of the infrastructure, climate change, and the economy. Thus, the most appropriate decision-making process to select maintenance and replacement strategies that are sustainable, economical, and safe should also be well informed in terms of risks. The decision process is formulated as a multi-objective optimization problem and exemplified the case for targeted performance levels and total costs, and solved using both Multi-Objective Particle Swarm Optimization (MOPSO) and a Non-dominated Sorting Genetic Algorithm II (NSGA-II). The results indicate that annual budget constraints have a significant effect on the Pareto front and the schedule associated with individual solutions. The proposed approach provides a useful and flexible decision-analysis tool for managers by allowing for multiple objective optimization in scheduling future interventions towards the sustainability of infrastructure.<br/></div> © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Decision making},\n%keywords = {Budget control;Climate change;Genetic algorithms;Multiobjective optimization;Particle swarm optimization (PSO);Screening;Sustainable development;},\n%note = {Decisions makings;Infrastructure;Infrastructure asset management;Infrastructure project;Management IS;Multi-objectives optimization;Physical state;Sources of uncertainty;Sustainable utilization;Utilization of resources;},\nURL = {http://dx.doi.org/10.1080/23789689.2023.2171197},\n} \n\n\n
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Infrastructure asset management is concerned with the efficient and sustainable utilization of resources. There are numerous sources of uncertainties associated with the physical state of the infrastructure, climate change, and the economy. Thus, the most appropriate decision-making process to select maintenance and replacement strategies that are sustainable, economical, and safe should also be well informed in terms of risks. The decision process is formulated as a multi-objective optimization problem and exemplified the case for targeted performance levels and total costs, and solved using both Multi-Objective Particle Swarm Optimization (MOPSO) and a Non-dominated Sorting Genetic Algorithm II (NSGA-II). The results indicate that annual budget constraints have a significant effect on the Pareto front and the schedule associated with individual solutions. The proposed approach provides a useful and flexible decision-analysis tool for managers by allowing for multiple objective optimization in scheduling future interventions towards the sustainability of infrastructure.
© 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n Assessment of the prediction of ground motion parameters in 1D ground response analysis using data from seismic arrays and centrifuge experiments.\n \n \n \n \n\n\n \n Bessette, C.; and Yniesta, S.\n\n\n \n\n\n\n Earthquake Spectra, 39(2): 1140 - 1165. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"AssessmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230613561995 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment of the prediction of ground motion parameters in 1D ground response analysis using data from seismic arrays and centrifuge experiments},\njournal = {Earthquake Spectra},\nauthor = {Bessette, Caroline and Yniesta, Samuel},\nvolume = {39},\nnumber = {2},\nyear = {2023},\npages = {1140 - 1165},\nissn = {87552930},\nabstract = {<div data-language="eng" data-ev-field="abstract">Peak ground acceleration (PGA), peak ground velocity (PGV), and spectral acceleration are among the most widely used metrics to represent seismic hazard characteristics in practice. Several simplified seismic design procedures to evaluate liquefaction triggering, slope stability, or structural response have also proposed other ground motion parameters (GMPs) to represent a ground motion’s intensity, duration, and frequency content. To account for soil effects, these parameters can be obtained from the results of one-dimensional (1D) ground response analyses. Few studies have systematically evaluated the prediction of these additional parameters from the results of ground response analyses. This study presents an exhaustive review of the accuracy and precision of the prediction of 19 common GMPs from the results of 1D ground response analyses using vertical seismic arrays and centrifuge tests. Total stress nonlinear analyses are conducted using the software DEEPSOIL along with equivalent-linear analysis. A reference dataset composed of 10 sites and 306 ground motion recordings representing varying conditions of seismic excitation is employed. The findings of this study showed that while the models produced a reasonable approximation of spectral accelerations, a general tendency toward the over-prediction of most parameters was revealed. The results identified that the mean period (T<inf>m</inf>) yielded the lowest bias, and other parameters, such as the predominant spectral period (T<inf>o</inf>), PGA, and PGV, also offered some improvements over the other parameters included in this study.<br/></div> © The Author(s) 2023.},\nkey = {Forecasting},\n%keywords = {Acceleration;Centrifuges;Earthquakes;Seismic design;Slope stability;Soil liquefaction;},\n%note = {1D ground response analysis;Earthquake ground motions;Ground motion parameters;Ground response analysis;Nonlinear soil behavior;Peak ground acceleration;Peak ground velocity;Seismic analysis;Seismic effect;Spectral acceleration;},\nURL = {http://dx.doi.org/10.1177/87552930221150828},\n} \n\n\n
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Peak ground acceleration (PGA), peak ground velocity (PGV), and spectral acceleration are among the most widely used metrics to represent seismic hazard characteristics in practice. Several simplified seismic design procedures to evaluate liquefaction triggering, slope stability, or structural response have also proposed other ground motion parameters (GMPs) to represent a ground motion’s intensity, duration, and frequency content. To account for soil effects, these parameters can be obtained from the results of one-dimensional (1D) ground response analyses. Few studies have systematically evaluated the prediction of these additional parameters from the results of ground response analyses. This study presents an exhaustive review of the accuracy and precision of the prediction of 19 common GMPs from the results of 1D ground response analyses using vertical seismic arrays and centrifuge tests. Total stress nonlinear analyses are conducted using the software DEEPSOIL along with equivalent-linear analysis. A reference dataset composed of 10 sites and 306 ground motion recordings representing varying conditions of seismic excitation is employed. The findings of this study showed that while the models produced a reasonable approximation of spectral accelerations, a general tendency toward the over-prediction of most parameters was revealed. The results identified that the mean period (Tm) yielded the lowest bias, and other parameters, such as the predominant spectral period (To), PGA, and PGV, also offered some improvements over the other parameters included in this study.
© The Author(s) 2023.\n
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\n \n\n \n \n \n \n \n \n Cyclic Response of Buckling-Restrained Stainless Steel Energy Dissipating Bars. II: Finite Element Investigations.\n \n \n \n \n\n\n \n Rahmzadeh, A.; Tremblay, R.; and Alam, M. S.\n\n\n \n\n\n\n Journal of Engineering Mechanics, 149(4). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"CyclicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230613547019 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Cyclic Response of Buckling-Restrained Stainless Steel Energy Dissipating Bars. II: Finite Element Investigations},\njournal = {Journal of Engineering Mechanics},\nauthor = {Rahmzadeh, Ahmad and Tremblay, Robert and Alam, M. Shahria},\nvolume = {149},\nnumber = {4},\nyear = {2023},\nissn = {07339399},\nabstract = {<div data-language="eng" data-ev-field="abstract">The first phase of experiments presented in Part I of this study is used to calibrate the 3D finite element (FE) modelling procedure of the tested fuse-type filler-injected buckling-restrained stainless steel energy dissipaters (EDs). The models are generated using a combined continuum-macro FE approach. A discussion is provided on the selection and calibration of material models. Sensitivity analyses are performed to investigate the effects of mesh sizes, imperfection shape and size, contact stiffness and friction coefficient on the cyclic response. After validating the FE analysis results against those obtained from the experiments, a parametric study is conducted with the objective of quantifying the required stiffness of the restraining system to avoid global-level buckling. At the end, an idealized elastic-perfectly plastic model with equivalent energy dissipation property is proposed for use in macro models.<br/></div> © 2023 American Society of Civil Engineers.},\nkey = {Buckling},\n%keywords = {Energy dissipation;Finite element method;Friction;Sensitivity analysis;Stainless steel;Stiffness;},\n%note = {3D finite element model;Buckling-restrained;Cyclic response;Energy dissipaters;Energy dissipating;Finite element investigation;Finite-element approach;Macro finite elements;Material modeling;Modeling procedure;},\nURL = {http://dx.doi.org/10.1061/JENMDT.EMENG-6958},\n} \n\n\n
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The first phase of experiments presented in Part I of this study is used to calibrate the 3D finite element (FE) modelling procedure of the tested fuse-type filler-injected buckling-restrained stainless steel energy dissipaters (EDs). The models are generated using a combined continuum-macro FE approach. A discussion is provided on the selection and calibration of material models. Sensitivity analyses are performed to investigate the effects of mesh sizes, imperfection shape and size, contact stiffness and friction coefficient on the cyclic response. After validating the FE analysis results against those obtained from the experiments, a parametric study is conducted with the objective of quantifying the required stiffness of the restraining system to avoid global-level buckling. At the end, an idealized elastic-perfectly plastic model with equivalent energy dissipation property is proposed for use in macro models.
© 2023 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Cyclic Response of Buckling-Restrained Stainless Steel Energy Dissipating Bars. I: Experimental Investigations.\n \n \n \n \n\n\n \n Rahmzadeh, A.; Alam, M. S.; and Tremblay, R.\n\n\n \n\n\n\n Journal of Engineering Mechanics, 149(4). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"CyclicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20230613547646 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Cyclic Response of Buckling-Restrained Stainless Steel Energy Dissipating Bars. I: Experimental Investigations},\njournal = {Journal of Engineering Mechanics},\nauthor = {Rahmzadeh, Ahmad and Alam, M. Shahria and Tremblay, Robert},\nvolume = {149},\nnumber = {4},\nyear = {2023},\nissn = {07339399},\nabstract = {<div data-language="eng" data-ev-field="abstract">The seismic performance of structures could be enhanced by the inclusion of supplemental components that dissipate the earthquake-induced energy. This is especially crucial for rocking structures that possess low energy dissipation properties due to their damage avoidance mechanism. Amongst variously developed yielding-type energy dissipaters (EDs), buckling-restrained energy dissipating carbon steel bars have received considerable attention as they make the most use of the inherent energy dissipation of steel and are easy to fabricate. However, maintenance, repair costs, and performance disruptions owing to corrosive environments have been mostly disregarded in past investigations. Employing stainless steel can be a viable solution to overcome such issues. The work described in this two-part study sheds light on various aspects of the buckling-restrained stainless steel EDs through experimental and finite element (FE) investigations. The mechanical properties of type 304L stainless steel including uniaxial monotonic response, strain sensitivity, and cyclic hardening are characterized. It is shown that the material possesses high ductility along with substantial hardening characteristics. In the first phase of testing, energy dissipating bars with different fuse diameters and lengths are designed. Load and strain capacities and bar-tube interactions of the buckling-restrained energy dissipation device are studied through quasi-static tests. In the second phase of testing, various EDs are designed, fabricated with stainless and mild steel, and tested under quasi-static loading to validate the findings of the FE investigations. The test results demonstrate a stable hysteresis response of the buckling-restrained stainless steel EDs with a cyclic average strain capacity of 10%. The FE modelling procedure, calibration, and parametric studies are presented in the companion paper as Part II.<br/></div> © 2023 American Society of Civil Engineers.},\nkey = {Strain},\n%keywords = {Buckling;Earthquakes;Energy dissipation;Hardening;Repair;Steel testing;},\n%note = {Buckling-restrained;Cyclic response;Energy dissipaters;Energy dissipating;Experimental investigations;Finite element investigation;Induced energy;Low energy dissipations;Seismic Performance;Strain capacities;},\nURL = {http://dx.doi.org/10.1061/JENMDT.EMENG-6957},\n} \n\n\n
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The seismic performance of structures could be enhanced by the inclusion of supplemental components that dissipate the earthquake-induced energy. This is especially crucial for rocking structures that possess low energy dissipation properties due to their damage avoidance mechanism. Amongst variously developed yielding-type energy dissipaters (EDs), buckling-restrained energy dissipating carbon steel bars have received considerable attention as they make the most use of the inherent energy dissipation of steel and are easy to fabricate. However, maintenance, repair costs, and performance disruptions owing to corrosive environments have been mostly disregarded in past investigations. Employing stainless steel can be a viable solution to overcome such issues. The work described in this two-part study sheds light on various aspects of the buckling-restrained stainless steel EDs through experimental and finite element (FE) investigations. The mechanical properties of type 304L stainless steel including uniaxial monotonic response, strain sensitivity, and cyclic hardening are characterized. It is shown that the material possesses high ductility along with substantial hardening characteristics. In the first phase of testing, energy dissipating bars with different fuse diameters and lengths are designed. Load and strain capacities and bar-tube interactions of the buckling-restrained energy dissipation device are studied through quasi-static tests. In the second phase of testing, various EDs are designed, fabricated with stainless and mild steel, and tested under quasi-static loading to validate the findings of the FE investigations. The test results demonstrate a stable hysteresis response of the buckling-restrained stainless steel EDs with a cyclic average strain capacity of 10%. The FE modelling procedure, calibration, and parametric studies are presented in the companion paper as Part II.
© 2023 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n A data-driven physics-informed stochastic framework for hurricane-induced risk estimation of transmission tower-line systems under a changing climate.\n \n \n \n \n\n\n \n Snaiki, R.; and Parida, S. S.\n\n\n \n\n\n\n Engineering Structures, 280. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230513471136 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A data-driven physics-informed stochastic framework for hurricane-induced risk estimation of transmission tower-line systems under a changing climate},\njournal = {Engineering Structures},\nauthor = {Snaiki, Reda and Parida, Siddharth S.},\nvolume = {280},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Hurricanes are one of the most devastating natural hazards which result in significant damage to civil infrastructure. The transmission tower-line system is specifically highly vulnerable to hurricane effects. Recent studies have indicated that the collapse of the transmission tower-line system during hurricane events is mainly due to the joint occurrence of wind and rain. Therefore, it is important to assess the failure probabilities of these structures under wind and rain-induced loads. With climate change, those probabilities are expected to significantly change where the brunt of the damage and economic losses would be disproportionately borne by coastal communities. This study proposes a hybrid risk-responsive, data-driven and physics-informed framework which evaluates the hurricane-induced damage to transmission lines in vulnerable regions and communities under several climate scenarios. The framework is founded upon an advanced physics informed hurricane simulation model followed by a Gaussian kernel density technique to efficiently estimate the intensity measures and quantify the associated uncertainties accurately. The generated hazard intensities are coupled with fragility surfaces expressed in terms of wind speed and rain intensity. Then, the failure probabilities are obtained for the transmission tower-line system under the joint excitation and future climate scenario. The framework is applied to several coastal cities along the US east coast. It is shown that, due to the involved system nonlinearity, the obtained failure probabilities change drastically with the future climate scenario. In addition, rainfall-induced loads which significantly impact the failure probabilities of the transmission tower-line systems are not only function of the selected sites, but also depend on the considered limit state and climate scenario. Therefore, their consideration is important for the structural design and estimation of the system performance.<br/></div> © 2023 Elsevier Ltd},\nkey = {Risk analysis},\n%keywords = {Climate change;Electric lines;Hazards;Hurricanes;Losses;Rain;Risk assessment;Risk perception;Stochastic models;Stochastic systems;Structural design;Towers;Uncertainty analysis;Wind;},\n%note = {Climate scenarios;Data driven;Failure Probability;Future climate scenarios;Physic-informed stochastic simulation;Risk estimation;Stochastic framework;Stochastic simulations;Transmission tower-line system;Transmission-line;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2023.115673},\n} \n\n\n
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Hurricanes are one of the most devastating natural hazards which result in significant damage to civil infrastructure. The transmission tower-line system is specifically highly vulnerable to hurricane effects. Recent studies have indicated that the collapse of the transmission tower-line system during hurricane events is mainly due to the joint occurrence of wind and rain. Therefore, it is important to assess the failure probabilities of these structures under wind and rain-induced loads. With climate change, those probabilities are expected to significantly change where the brunt of the damage and economic losses would be disproportionately borne by coastal communities. This study proposes a hybrid risk-responsive, data-driven and physics-informed framework which evaluates the hurricane-induced damage to transmission lines in vulnerable regions and communities under several climate scenarios. The framework is founded upon an advanced physics informed hurricane simulation model followed by a Gaussian kernel density technique to efficiently estimate the intensity measures and quantify the associated uncertainties accurately. The generated hazard intensities are coupled with fragility surfaces expressed in terms of wind speed and rain intensity. Then, the failure probabilities are obtained for the transmission tower-line system under the joint excitation and future climate scenario. The framework is applied to several coastal cities along the US east coast. It is shown that, due to the involved system nonlinearity, the obtained failure probabilities change drastically with the future climate scenario. In addition, rainfall-induced loads which significantly impact the failure probabilities of the transmission tower-line systems are not only function of the selected sites, but also depend on the considered limit state and climate scenario. Therefore, their consideration is important for the structural design and estimation of the system performance.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Regional seismic risk and resilience assessment: Methodological development, applicability, and future research needs – An earthquake engineering perspective.\n \n \n \n \n\n\n \n Du, A.; Wang, X.; Xie, Y.; and Dong, Y.\n\n\n \n\n\n\n Reliability Engineering and System Safety, 233. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"RegionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230413441816 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Regional seismic risk and resilience assessment: Methodological development, applicability, and future research needs – An earthquake engineering perspective},\njournal = {Reliability Engineering and System Safety},\nauthor = {Du, Ao and Wang, Xiaowei and Xie, Yazhou and Dong, You},\nvolume = {233},\nyear = {2023},\nissn = {09518320},\nabstract = {<div data-language="eng" data-ev-field="abstract">Given the devastating losses incurred by past major earthquake events together with the ever-increasing global seismic exposures due to population growth and urbanization, strategic decision-support tools are required to help stakeholders make more contemplated decisions that promote seismic resilience of the built environment. Such decision-support is enabled by regional seismic risk and resilience assessment, which holistically incorporates the various underlying physics processes and uncertainties for quantitative and probabilistic assessment of regional seismic hazard impacts, and has thereby attracted increasing research focus over the past twenty years. As a significant departure from the traditional site-specific assessment, where only an individual structure and site-specific seismic hazard are of interest, such regional-level assessment introduces additional dimensions and complexity. To date, there is a lack of review studies summarizing the related research advancements in seismic risk and resilience assessment from a regional-level perspective in the context of earthquake engineering. This study fills this gap by conducting a systematic review covering: the methodological development of regional seismic risk assessment (RSRiA) across its key modules, including hazard analysis, exposure modeling, fragility assessment, and consequence evaluation, as well as the associated uncertainty quantification and propagation; the development of resilience metrics, restoration modeling and planning in regional seismic resilience assessment (RSReA); and the applicability of existing computational workflows. Insights into the features, applicability, compatibility, and limitations of existing models and tools are provided. This study also highlights the challenges and future directions toward further advancing the research frontiers of RSRiA and RSReA.<br/></div> © 2023 Elsevier Ltd},\nkey = {Uncertainty analysis},\n%keywords = {Decision support systems;Earthquake engineering;Earthquakes;Engineering geology;Hazards;Population statistics;Restoration;Risk assessment;Seismic response;},\n%note = {Consequence evaluation;Decision supports;Exposure models;Fragility assessment;Regional seismic hazard analyse;Restoration model;Restoration planning;Seismic hazard analysis;Seismic resilience;Uncertainty quantification and propagation;},\nURL = {http://dx.doi.org/10.1016/j.ress.2023.109104},\n} \n\n\n
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Given the devastating losses incurred by past major earthquake events together with the ever-increasing global seismic exposures due to population growth and urbanization, strategic decision-support tools are required to help stakeholders make more contemplated decisions that promote seismic resilience of the built environment. Such decision-support is enabled by regional seismic risk and resilience assessment, which holistically incorporates the various underlying physics processes and uncertainties for quantitative and probabilistic assessment of regional seismic hazard impacts, and has thereby attracted increasing research focus over the past twenty years. As a significant departure from the traditional site-specific assessment, where only an individual structure and site-specific seismic hazard are of interest, such regional-level assessment introduces additional dimensions and complexity. To date, there is a lack of review studies summarizing the related research advancements in seismic risk and resilience assessment from a regional-level perspective in the context of earthquake engineering. This study fills this gap by conducting a systematic review covering: the methodological development of regional seismic risk assessment (RSRiA) across its key modules, including hazard analysis, exposure modeling, fragility assessment, and consequence evaluation, as well as the associated uncertainty quantification and propagation; the development of resilience metrics, restoration modeling and planning in regional seismic resilience assessment (RSReA); and the applicability of existing computational workflows. Insights into the features, applicability, compatibility, and limitations of existing models and tools are provided. This study also highlights the challenges and future directions toward further advancing the research frontiers of RSRiA and RSReA.
© 2023 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n A simplified approach for design of steel-GFRP hybrid reinforced concrete sections.\n \n \n \n \n\n\n \n Ibrahim, M.; Asadian, A.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 278. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230413413677 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A simplified approach for design of steel-GFRP hybrid reinforced concrete sections},\njournal = {Engineering Structures},\nauthor = {Ibrahim, Mostafa and Asadian, Alireza and Galal, Khaled},\nvolume = {278},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">The corrosion of steel reinforcement is one of the main reasons for the deterioration of reinforced concrete (RC) structures subjected to harsh environments. Glass fibre-reinforced polymer (GFRP) reinforcing bars have emerged as an ideal solution at an affordable cost for eliminating this issue. The design of steel RC elements can be controlled by ultimate limit state (ULS) requirements, resulting in over-designed sections for the serviceability limit state (SLS). On the other hand, the design of GFRP RC elements is typically controlled by SLS checks, resulting in over-designed sections for the ULS. Replacing some steel rebars with GFRP bars could be an economical solution in the case of a shortage in the supply of steel rebars, especially in large quantities of steel reinforcement. This replacement with GFRP bars would be even more economically attractive if the replaced steel bars were stainless, epoxy-coated, zinc-coated or galvanized. This research aims to set a platform for designing steel-GFRP hybrid RC sections. Based on fundamental theories of reinforced concrete beams and the available literature, design considerations are suggested for the design of steel-GFRP hybrid RC flexural elements. Using the proposed design recommendations, an analytical study was undertaken to develop simplified design charts for transforming steel RC sections to alternative steel-GFRP hybrid RC sections with the same total number of bars. This research proposes a step-by-step design procedure using design charts to find a replacement ratio of an alternative steel-GFRP hybrid RC section using properties of a steel GFRP RC section that would suit its design purpose.<br/></div> © 2022 Elsevier Ltd},\nkey = {Reinforced concrete},\n%keywords = {Bars (metal);Bridge decks;Concrete beams and girders;Design;Deterioration;Fiber reinforced plastics;Glass fibers;Plastic coatings;Steel corrosion;Steel fibers;Zinc coatings;},\n%note = {Design recommendations;Glass fiber-reinforced polymer reinforcing bar;Glassfiber reinforced polymers (GFRP);Polymer hybrid;Reinforcing bar;Section analysis;Steel reinforced concrete;Steel reinforcements;Steel-glass fiber-reinforced polymer hybrid reinforced concrete section;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.115352},\n} \n\n\n
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The corrosion of steel reinforcement is one of the main reasons for the deterioration of reinforced concrete (RC) structures subjected to harsh environments. Glass fibre-reinforced polymer (GFRP) reinforcing bars have emerged as an ideal solution at an affordable cost for eliminating this issue. The design of steel RC elements can be controlled by ultimate limit state (ULS) requirements, resulting in over-designed sections for the serviceability limit state (SLS). On the other hand, the design of GFRP RC elements is typically controlled by SLS checks, resulting in over-designed sections for the ULS. Replacing some steel rebars with GFRP bars could be an economical solution in the case of a shortage in the supply of steel rebars, especially in large quantities of steel reinforcement. This replacement with GFRP bars would be even more economically attractive if the replaced steel bars were stainless, epoxy-coated, zinc-coated or galvanized. This research aims to set a platform for designing steel-GFRP hybrid RC sections. Based on fundamental theories of reinforced concrete beams and the available literature, design considerations are suggested for the design of steel-GFRP hybrid RC flexural elements. Using the proposed design recommendations, an analytical study was undertaken to develop simplified design charts for transforming steel RC sections to alternative steel-GFRP hybrid RC sections with the same total number of bars. This research proposes a step-by-step design procedure using design charts to find a replacement ratio of an alternative steel-GFRP hybrid RC section using properties of a steel GFRP RC section that would suit its design purpose.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Impacts of Spatiotemporal Gaps in Satellite Soil Moisture Data on Hydrological Data Assimilation.\n \n \n \n \n\n\n \n Mohammed, K.; Leconte, R.; and Trudel, M.\n\n\n \n\n\n\n Water (Switzerland), 15(2). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ImpactsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230513455337 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impacts of Spatiotemporal Gaps in Satellite Soil Moisture Data on Hydrological Data Assimilation},\njournal = {Water (Switzerland)},\nauthor = {Mohammed, Khaled and Leconte, Robert and Trudel, Melanie},\nvolume = {15},\nnumber = {2},\nyear = {2023},\nissn = {20734441},\nabstract = {<div data-language="eng" data-ev-field="abstract">Soil moisture modeling is necessary for many hydrometeorological and agricultural applications. One of the ways in which the modeling of soil moisture (SM) can be improved is by assimilating SM observations to update the model states. Remotely sensed SM observations are prone to being riddled with data discontinuities, namely in the horizontal and vertical spatial, and temporal, dimensions. In this study, a set of synthetic experiments were designed to assess how much impact each of these individual components of spatiotemporal gaps can have on the modeling performance of SM, as well as streamflow. The results show that not having root-zone SM estimates from satellite derived observations is most impactful in terms of the modeling performance. Having temporal gaps and horizontal spatial gaps in the satellite SM data also impacts the modeling performance, but to a lesser degree. Real-data experiments with the remotely sensed Soil Moisture Active Passive (SMAP) product generally brought improvements to the SM modeling performance in the upper soil layers, but to a lesser degree in the bottom soil layer. The updating of the model SM states with observations also resulted in some improvements in the streamflow modeling performance during the synthetic experiments, but not during the real-data experiments.<br/></div> © 2023 by the authors.},\nkey = {Soil moisture},\n%keywords = {Remote sensing;Satellites;Stream flow;},\n%note = {Active/passive;Data assimilation;EnKF;Modeling performance;Moisture data;Remotely sensed soil moisture;Satellite soil moisture;Soil moisture active passive;Soil moisture model;WRF-hydro;},\nURL = {http://dx.doi.org/10.3390/w15020321},\n} \n\n\n
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Soil moisture modeling is necessary for many hydrometeorological and agricultural applications. One of the ways in which the modeling of soil moisture (SM) can be improved is by assimilating SM observations to update the model states. Remotely sensed SM observations are prone to being riddled with data discontinuities, namely in the horizontal and vertical spatial, and temporal, dimensions. In this study, a set of synthetic experiments were designed to assess how much impact each of these individual components of spatiotemporal gaps can have on the modeling performance of SM, as well as streamflow. The results show that not having root-zone SM estimates from satellite derived observations is most impactful in terms of the modeling performance. Having temporal gaps and horizontal spatial gaps in the satellite SM data also impacts the modeling performance, but to a lesser degree. Real-data experiments with the remotely sensed Soil Moisture Active Passive (SMAP) product generally brought improvements to the SM modeling performance in the upper soil layers, but to a lesser degree in the bottom soil layer. The updating of the model SM states with observations also resulted in some improvements in the streamflow modeling performance during the synthetic experiments, but not during the real-data experiments.
© 2023 by the authors.\n
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\n \n\n \n \n \n \n \n \n Seismic Evaluation of Lava Tubes Subjected to Moonquakes.\n \n \n \n \n\n\n \n Seifamiri, H.; Maghoul, P.; Boudreault, R.; Bouaanani, N.; and de Moraes, R.\n\n\n \n\n\n\n In pages 641 - 651, Denver, CO, United states, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20230413425940 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Evaluation of Lava Tubes Subjected to Moonquakes},\njournal = {Earth and Space 2022: Space Exploration, Utilization, Engineering, and Construction in Extreme Environments - Selected Papers from the 18th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments},\nauthor = {Seifamiri, Hamed and Maghoul, Pooneh and Boudreault, Richard and Bouaanani, Najib and de Moraes, Roberto},\nyear = {2023},\npages = {641 - 651},\naddress = {Denver, CO, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">In this paper, the seismic response of lava tubes was estimated. Several dimensionless numerical analyses were carried out for various dimensionless geometries. The effects of key influencing factors such as the depth of the lava tubes, the gravitational effect of the Moon, and the frequency content of the incident motion on the dynamic response of lava tubes were studied. The findings can be useful in geotechnical moonquake engineering and lunar seismology and provide some practical insights into the design of future moonquake-resilient human habitats on the Moon.<br/></div> © ASCE.},\nkey = {Moon},\n%keywords = {Seismology;},\n%note = {Frequency contents;Geotechnical;Human habitats;Key influencing factors;Seismic evaluation;},\nURL = {http://dx.doi.org/10.1061/9780784484470.056},\n} \n\n\n
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In this paper, the seismic response of lava tubes was estimated. Several dimensionless numerical analyses were carried out for various dimensionless geometries. The effects of key influencing factors such as the depth of the lava tubes, the gravitational effect of the Moon, and the frequency content of the incident motion on the dynamic response of lava tubes were studied. The findings can be useful in geotechnical moonquake engineering and lunar seismology and provide some practical insights into the design of future moonquake-resilient human habitats on the Moon.
© ASCE.\n
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\n \n\n \n \n \n \n \n \n Penetration Analysis of High-Frequency Vibro-Based Probes in Granular Media Using the Discrete Element Method.\n \n \n \n \n\n\n \n Varnosfaderani, M. A.; Maghoul, P.; and Wu, N.\n\n\n \n\n\n\n In pages 176 - 183, Denver, CO, United states, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"PenetrationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20230413426189 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Penetration Analysis of High-Frequency Vibro-Based Probes in Granular Media Using the Discrete Element Method},\njournal = {Earth and Space 2022: Space Exploration, Utilization, Engineering, and Construction in Extreme Environments - Selected Papers from the 18th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments},\nauthor = {Varnosfaderani, Mahdi Alaei and Maghoul, Pooneh and Wu, Nan},\nyear = {2023},\npages = {176 - 183},\naddress = {Denver, CO, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Due to payload limitations in space missions, light and compact investigation tools should be developed for subsurface exploration on the Moon, Mars, and beyond. Here, we aim to investigate the effects of high-frequency vibrations on reducing the overhead load required for the penetration of a typical probe into granular media. The discrete element method is used to examine the effect of vibration frequency, mode, and the probe's head on penetration resistance. The results show that employing high-frequency vibration is a promising technique for overcoming the payload limitations for subsurface investigation in remote areas.<br/></div> © ASCE.},\nkey = {Probes},\n%keywords = {Granular materials;},\n%note = {Discrete elements method;Effect of vibration;Frequency modes;Granular medium;High frequency HF;High-frequency vibrations;Penetration analysis;Space missions;Subsurface exploration;Vibration frequency;},\nURL = {http://dx.doi.org/10.1061/9780784484470.016},\n} \n\n\n
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Due to payload limitations in space missions, light and compact investigation tools should be developed for subsurface exploration on the Moon, Mars, and beyond. Here, we aim to investigate the effects of high-frequency vibrations on reducing the overhead load required for the penetration of a typical probe into granular media. The discrete element method is used to examine the effect of vibration frequency, mode, and the probe's head on penetration resistance. The results show that employing high-frequency vibration is a promising technique for overcoming the payload limitations for subsurface investigation in remote areas.
© ASCE.\n
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\n \n\n \n \n \n \n \n \n An investigation into the aging of disposable face masks in landfill leachate.\n \n \n \n \n\n\n \n Lyu, L.; Wang, Z.; Bagchi, M.; Ye, Z.; Soliman, A.; Bagchi, A.; Markoglou, N.; Yin, J.; An, C.; Yang, X.; Bi, H.; and Cai, M.\n\n\n \n\n\n\n Journal of Hazardous Materials, 446. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230213379833 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An investigation into the aging of disposable face masks in landfill leachate},\njournal = {Journal of Hazardous Materials},\nauthor = {Lyu, Linxiang and Wang, Zheng and Bagchi, Monisha and Ye, Zhibin and Soliman, Ahmed and Bagchi, Ashutosh and Markoglou, Nektaria and Yin, Jianan and An, Chunjiang and Yang, Xiaohan and Bi, Huifang and Cai, Mengfan},\nvolume = {446},\nyear = {2023},\nissn = {03043894},\nabstract = {<div data-language="eng" data-ev-field="abstract">Due to the excessive use of disposable face masks during the COVID-19 pandemic, their accumulation has posed a great threat to the environment. In this study, we explored the fate of masks after being disposed in landfill. We simulated the possible process that masks would experience, including the exposure to sunlight before being covered and the contact with landfill leachate. After exposure to UV radiation, all three mask layers exhibited abrasions and fractures on the surface and became unstable with the increased UV radiation duration showed aging process. The alterations in chemical groups of masks as well as the lower mechanical strength of masks after UV weathering were detected to prove the happened aging process. Then it was found that the aging of masks in landfill leachate was further accelerated compared to these processes occurring in deionized water. Furthermore, the carbonyl index and isotacticity of the mask samples after aging for 30 days in leachate were higher than those of pristine materials, especially for those endured longer UV radiation. Similarly, the weight and tensile strength of the aged masks were also found lower than the original samples. Masks were likely to release more microparticles and high concentration of metal elements into leachate than deionized water after UV radiation and aging. After being exposed to UV radiation for 48 h, the concentration of released particles in leachate was 39.45 μL/L after 1 day and then grew to 309.45 μL/L after 30 days of aging. Seven elements (Al, Cr, Cu, Zn, Cd, Sb and Pb) were detected in leachate and the concentration of this metal elements increased with the longer aging time. The findings of this study can advance our understanding of the fate of disposable masks in the landfill and develop the strategy to address this challenge in waste management.<br/></div> © 2023 Elsevier B.V.},\nkey = {Deionized water},\n%keywords = {Leachate treatment;Tensile strength;Ultraviolet radiation;},\n%note = {Ageing process;Chemical pollutants;Deionised waters;Disposable face mask;Disposables;Face masks;Landfill leachates;Leachates;Metal elements;Micro particles;},\nURL = {http://dx.doi.org/10.1016/j.jhazmat.2022.130671},\n} \n\n\n
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Due to the excessive use of disposable face masks during the COVID-19 pandemic, their accumulation has posed a great threat to the environment. In this study, we explored the fate of masks after being disposed in landfill. We simulated the possible process that masks would experience, including the exposure to sunlight before being covered and the contact with landfill leachate. After exposure to UV radiation, all three mask layers exhibited abrasions and fractures on the surface and became unstable with the increased UV radiation duration showed aging process. The alterations in chemical groups of masks as well as the lower mechanical strength of masks after UV weathering were detected to prove the happened aging process. Then it was found that the aging of masks in landfill leachate was further accelerated compared to these processes occurring in deionized water. Furthermore, the carbonyl index and isotacticity of the mask samples after aging for 30 days in leachate were higher than those of pristine materials, especially for those endured longer UV radiation. Similarly, the weight and tensile strength of the aged masks were also found lower than the original samples. Masks were likely to release more microparticles and high concentration of metal elements into leachate than deionized water after UV radiation and aging. After being exposed to UV radiation for 48 h, the concentration of released particles in leachate was 39.45 μL/L after 1 day and then grew to 309.45 μL/L after 30 days of aging. Seven elements (Al, Cr, Cu, Zn, Cd, Sb and Pb) were detected in leachate and the concentration of this metal elements increased with the longer aging time. The findings of this study can advance our understanding of the fate of disposable masks in the landfill and develop the strategy to address this challenge in waste management.
© 2023 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Local defect detection using structural health monitoring with semi-non-contact and fully automated instrumentation.\n \n \n \n \n\n\n \n Sajid, S.; and Chouinard, L.\n\n\n \n\n\n\n Journal of Civil Structural Health Monitoring, 13(2-3): 649 - 659. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"LocalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230313387070 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Local defect detection using structural health monitoring with semi-non-contact and fully automated instrumentation},\njournal = {Journal of Civil Structural Health Monitoring},\nauthor = {Sajid, Sikandar and Chouinard, Luc},\nvolume = {13},\nnumber = {2-3},\nyear = {2023},\npages = {649 - 659},\nissn = {21905452},\nabstract = {<div data-language="eng" data-ev-field="abstract">An efficient and fully automated global health monitoring approach to detect and quantify local defects in reinforced concrete slabs with minimal equipment and without the need of baseline information is proposed as an alternative to presently used non-destructive test (NDT) methods. Such defects are generally detected locally through a sequence of measurements over a grid at the surface of an element with stress-wave or electromagnetic-based NDT. It is shown that the delineation of local defects can also be obtained by using structural health methodologies, on high-frequency measurements, similar to those from stress-wave NDT methods but with higher efficiency. In this application, data are obtained by using an automated roving laser vibrometer and an automated modal impactor with load cell, eliminating the need to physically move the impactor and sensor over each location of the grid. Experimental measurements were performed on a reinforced concrete slab with built-in defects consisting of delaminations at different depths, debonding, and honeycomb. The location of the automated impactor is kept at a fixed position while the laser beam measurements are performed sequentially at a grid of locations on the surface of the plate. A comparison of the frequency response functions (FRFs) at each point indicates that for resonant peaks above 700 Hz, higher responses are obtained at locations above defects. The spatial contour plots of the FRFs at respective resonant frequencies (i.e. 796 Hz, 1327 Hz, and 1854 Hz) are shown to correspond to the locations of the debonding, shallow delamination, and deep delamination. The defect detection and delineation is compared to results obtained from the C-scan generated with ultrasonic shear-wave tomography, and from impulse-response test data analyzed with a recently proposed statistical pattern recognition procedure. The detection and localization of the local defects with the more efficient automated health monitoring approach is shown to be comparable to those obtained with the two selected local NDT methods. The proposed approach provides a viable process to implement quality control in prefabricated concrete elements that are not currently in-practice.<br/></div> © 2023, Springer-Verlag GmbH Germany, part of Springer Nature.},\nkey = {Impulse response},\n%keywords = {Concrete slabs;Frequency response;Location;Natural frequencies;Nondestructive examination;Pattern recognition;Shear flow;Shear waves;Structural health monitoring;Tomography;Ultrasonic testing;},\n%note = {Defect detection;Fully automated;Health monitoring;Impactors;Impulse-response test;Local defects;Non-destructive test methods;Nondestructive tests;Ultrasonic shear waves;Ultrasonic shear-wave tomography;},\nURL = {http://dx.doi.org/10.1007/s13349-023-00671-y},\n} \n\n\n
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An efficient and fully automated global health monitoring approach to detect and quantify local defects in reinforced concrete slabs with minimal equipment and without the need of baseline information is proposed as an alternative to presently used non-destructive test (NDT) methods. Such defects are generally detected locally through a sequence of measurements over a grid at the surface of an element with stress-wave or electromagnetic-based NDT. It is shown that the delineation of local defects can also be obtained by using structural health methodologies, on high-frequency measurements, similar to those from stress-wave NDT methods but with higher efficiency. In this application, data are obtained by using an automated roving laser vibrometer and an automated modal impactor with load cell, eliminating the need to physically move the impactor and sensor over each location of the grid. Experimental measurements were performed on a reinforced concrete slab with built-in defects consisting of delaminations at different depths, debonding, and honeycomb. The location of the automated impactor is kept at a fixed position while the laser beam measurements are performed sequentially at a grid of locations on the surface of the plate. A comparison of the frequency response functions (FRFs) at each point indicates that for resonant peaks above 700 Hz, higher responses are obtained at locations above defects. The spatial contour plots of the FRFs at respective resonant frequencies (i.e. 796 Hz, 1327 Hz, and 1854 Hz) are shown to correspond to the locations of the debonding, shallow delamination, and deep delamination. The defect detection and delineation is compared to results obtained from the C-scan generated with ultrasonic shear-wave tomography, and from impulse-response test data analyzed with a recently proposed statistical pattern recognition procedure. The detection and localization of the local defects with the more efficient automated health monitoring approach is shown to be comparable to those obtained with the two selected local NDT methods. The proposed approach provides a viable process to implement quality control in prefabricated concrete elements that are not currently in-practice.
© 2023, Springer-Verlag GmbH Germany, part of Springer Nature.\n
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\n \n\n \n \n \n \n \n \n Comparative study on the bond performance of near-surface mounted fiber-reinforced polymer bars.\n \n \n \n \n\n\n \n Aljidda, O.; El Refai, A.; and Alnahhal, W.\n\n\n \n\n\n\n Construction and Building Materials, 364. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ComparativePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230213353593 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Comparative study on the bond performance of near-surface mounted fiber-reinforced polymer bars},\njournal = {Construction and Building Materials},\nauthor = {Aljidda, Omar and El Refai, Ahmed and Alnahhal, Wael},\nvolume = {364},\nyear = {2023},\nissn = {09500618},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents the experimental and analytical results of a large study on the bond performance of near-surface mounted (NSM) fiber-reinforced polymer (FRP) bars. The investigated parameters included the bar material (basalt-FRP (BFRP), glass-FRP (GFRP), carbon-FRP (CFRP), and stainless steel (SS) bars), the bar surface configuration (deformed and sand-coated bars), the filling adhesive (NSM-Gel, Sikadur-30, and Sika Grout-214), and the bonded length of the bar (6, 12, and 24 times its diameter). Sixty-six C-shape concrete specimens were tested under direct pullout loading configuration. The bond strength, the free-end and loaded-end slip, the strains in the NSM bar, and the modes of failure of the tested specimens are reported and discussed. The NSM-Gel adhesive outperformed other adhesives in developing the bond strength of the tested specimens regardless of their bar material. Both the deformed and sand-coated NSM-BFRP and GFRP bars showed almost similar bond strengths while the NSM-CFRP bars showed the highest strengths. The images obtained from the scanning electron microscope confirmed the obtained results in terms of the modes of failure and the bond failure mechanism. Analytically, the BPE model was calibrated using the experimental results to describe the bond stress-slip relationships of the FRP bars.<br/></div> © 2022 Elsevier Ltd},\nkey = {Basalt},\n%keywords = {Adhesives;Bars (metal);Bond strength (materials);Bridge decks;Failure (mechanical);Fiber reinforced plastics;Plastic coatings;Scanning electron microscopy;},\n%note = {Bond;BPE model;Epoxy;Fiber-reinforced polymers;Fibre reinforced polymers;Near surface mounted;Near-surface mounted technique;Pullout;Slip;Strengthening;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2022.129923},\n} \n\n\n
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This paper presents the experimental and analytical results of a large study on the bond performance of near-surface mounted (NSM) fiber-reinforced polymer (FRP) bars. The investigated parameters included the bar material (basalt-FRP (BFRP), glass-FRP (GFRP), carbon-FRP (CFRP), and stainless steel (SS) bars), the bar surface configuration (deformed and sand-coated bars), the filling adhesive (NSM-Gel, Sikadur-30, and Sika Grout-214), and the bonded length of the bar (6, 12, and 24 times its diameter). Sixty-six C-shape concrete specimens were tested under direct pullout loading configuration. The bond strength, the free-end and loaded-end slip, the strains in the NSM bar, and the modes of failure of the tested specimens are reported and discussed. The NSM-Gel adhesive outperformed other adhesives in developing the bond strength of the tested specimens regardless of their bar material. Both the deformed and sand-coated NSM-BFRP and GFRP bars showed almost similar bond strengths while the NSM-CFRP bars showed the highest strengths. The images obtained from the scanning electron microscope confirmed the obtained results in terms of the modes of failure and the bond failure mechanism. Analytically, the BPE model was calibrated using the experimental results to describe the bond stress-slip relationships of the FRP bars.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Assessment of existing Vs-Lab correlations regarding Eastern Canadian clays.\n \n \n \n \n\n\n \n Elbeggo, D.; Ethier, Y.; Karray, M.; and Dube, J.\n\n\n \n\n\n\n Soil Dynamics and Earthquake Engineering, 164. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"AssessmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230213351350 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment of existing Vs-Lab correlations regarding Eastern Canadian clays},\njournal = {Soil Dynamics and Earthquake Engineering},\nauthor = {Elbeggo, Dania and Ethier, Yannic and Karray, Mourad and Dube, Jean-Sebastien},\nvolume = {164},\nyear = {2023},\nissn = {02677261},\nabstract = {<div data-language="eng" data-ev-field="abstract">The small strain shear modulus, G<inf>max</inf>, is an important parameter for characterizing the seismic response of deposits to dynamic loading. The parameter is related to shear wave velocity (G<inf>max</inf>=ρV<inf>s</inf><sup>2</sup>) only via the soil density. Existing V<inf>s</inf> correlations established in the laboratory were compiled in this paper and grouped into different general forms. Laboratory V<inf>s</inf> measurements using the piezoelectric ring-actuator technique, P-RAT, incorporated in conventional oedometer cells, were performed for six Eastern Canadian clay deposits. Specific correlations were established between normalized shear wave velocities, V<inf>s1</inf>, with the overconsolidation (OCR) and void ratios (e). The paper examines the applicability of existing correlations by comparing V<inf>s1</inf> values obtained from P-RAT correlations to those predicted by published laboratory correlations. While several correlations can be used to predict V<inf>s</inf> for Eastern Canadian clay, the applicability of other correlations has however been questioned. The analysis reveals the importance of considering the effect of the percentage of fine particles (<2 μm). This effect changes the void ratio variation range, which in turn has a significant impact on V<inf>s</inf> values. Furthermore, two general correlations are suggested based on P-RAT results and considering the clay content of analyzed sites. These general correlations can be readily used to estimate V<inf>s1</inf> values for low and high plasticity clays.<br/></div> © 2022},\nkey = {Laboratories},\n%keywords = {Acoustic wave velocity;Actuators;Clay deposits;Deposits;Dynamic loads;Rats;Shear flow;Shear waves;Soil mechanics;Wave propagation;},\n%note = {Correlation;Eastern canadian clay;General correlations;P-RAT;Piezoelectric ring-actuator technique;Piezoelectric rings;Ring actuators;Shear wave velocity;Voids ratio;Vs;},\nURL = {http://dx.doi.org/10.1016/j.soildyn.2022.107607},\n} \n\n\n
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The small strain shear modulus, Gmax, is an important parameter for characterizing the seismic response of deposits to dynamic loading. The parameter is related to shear wave velocity (Gmax=ρVs2) only via the soil density. Existing Vs correlations established in the laboratory were compiled in this paper and grouped into different general forms. Laboratory Vs measurements using the piezoelectric ring-actuator technique, P-RAT, incorporated in conventional oedometer cells, were performed for six Eastern Canadian clay deposits. Specific correlations were established between normalized shear wave velocities, Vs1, with the overconsolidation (OCR) and void ratios (e). The paper examines the applicability of existing correlations by comparing Vs1 values obtained from P-RAT correlations to those predicted by published laboratory correlations. While several correlations can be used to predict Vs for Eastern Canadian clay, the applicability of other correlations has however been questioned. The analysis reveals the importance of considering the effect of the percentage of fine particles (<2 μm). This effect changes the void ratio variation range, which in turn has a significant impact on Vs values. Furthermore, two general correlations are suggested based on P-RAT results and considering the clay content of analyzed sites. These general correlations can be readily used to estimate Vs1 values for low and high plasticity clays.
© 2022\n
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\n \n\n \n \n \n \n \n \n Retrieval performances of different crop growth descriptors from full- and compact-polarimetric SAR decompositions.\n \n \n \n \n\n\n \n Wang, H.; Magagi, R.; Goita, K.; Duguay, Y.; Trudel, M.; and Muhuri, A.\n\n\n \n\n\n\n Remote Sensing of Environment, 285. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"RetrievalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20230213353945 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Retrieval performances of different crop growth descriptors from full- and compact-polarimetric SAR decompositions},\njournal = {Remote Sensing of Environment},\nauthor = {Wang, Hongquan and Magagi, Ramata and Goita, Kalifa and Duguay, Yannick and Trudel, Melanie and Muhuri, Arnab},\nvolume = {285},\nyear = {2023},\nissn = {00344257},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study investigates the different performances between Compact-Polarimetric (CP) and Full-Polarimetric (FP) SAR to retrieve multiple crop growth parameters including Vegetation Water Content (VWC), Leaf Area Index (LAI), height, and dry biomass. The objective is to study at which conditions the CP SAR can obtain comparable retrieval accuracy as FP SAR for specific crop types and growth descriptors. Polarimetric decompositions were used to extract CP and FP explanatory variables to quantify crop growth status. Then, the sensitivities of CP and FP variables to different crop descriptors were analyzed, revealing higher sensitivity to height than LAI, VWC, and dry biomass. In order to reduce the information redundancy of sets of CP and FP SAR variables, Partial Least Square (PLS) approach was used to develop new orthogonal SAR parameters, while Step-Wise Regression (SWR) was used to determine the optimal SAR parameters, followed by retrievals of multiple crop growth descriptors using the developed estimators. Validated by the ground measurements, the retrieval performances are found to be highly dependent on polarimetry dimension (CP or FP), crop types, and targeted crop descriptors. With crop growth and enhanced depolarization effects, the CP SAR can capture the increasing volume power and decreasing surface power but at a lower rate than FP SAR. The m-δ and m-χ decompositions provide similar scattering components which differ from the Random Volume Over Ground (RVOG) decomposition. The third Stokes parameter g<inf>3</inf> of the CP SAR data that indicates the strength of the circular polarization component is a common important parameter to infer the multiple crop parameters of interest. In agreement with the sensitivity analysis, better retrieval accuracies were obtained for height and dry biomass than VWC and LAI. For short vegetation such as soybean, full polarimetry is required to obtain the estimates of all four crop growth descriptors. On the contrary, for tall crop growth parameters, such as canola (height and dry biomass), corn (height, VWC, dry biomass), and wheat (LAI, VWC, dry biomass), the CP SAR features can provide comparable robust retrieval accuracy as the FP SAR features. This study deepens our insights into the CP SAR of the RADARSAT Constellation Mission (RCM) to timely monitor crop growth and health status.<br/></div> © 2022 Elsevier Inc.},\nkey = {Polarimeters},\n%keywords = {Biomass;Crops;Decomposition;Ecology;Ellipsometry;Parameter estimation;Sensitivity analysis;Synthetic aperture radar;Vegetation;},\n%note = {Compact polarimetries;Crop growth;Crop growth descriptor;Crop type;Descriptors;Dry biomass;Full polarimetry;Polarimetric SAR;Retrieval performance;Vegetation water content;},\nURL = {http://dx.doi.org/10.1016/j.rse.2022.113381},\n} \n\n\n
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This study investigates the different performances between Compact-Polarimetric (CP) and Full-Polarimetric (FP) SAR to retrieve multiple crop growth parameters including Vegetation Water Content (VWC), Leaf Area Index (LAI), height, and dry biomass. The objective is to study at which conditions the CP SAR can obtain comparable retrieval accuracy as FP SAR for specific crop types and growth descriptors. Polarimetric decompositions were used to extract CP and FP explanatory variables to quantify crop growth status. Then, the sensitivities of CP and FP variables to different crop descriptors were analyzed, revealing higher sensitivity to height than LAI, VWC, and dry biomass. In order to reduce the information redundancy of sets of CP and FP SAR variables, Partial Least Square (PLS) approach was used to develop new orthogonal SAR parameters, while Step-Wise Regression (SWR) was used to determine the optimal SAR parameters, followed by retrievals of multiple crop growth descriptors using the developed estimators. Validated by the ground measurements, the retrieval performances are found to be highly dependent on polarimetry dimension (CP or FP), crop types, and targeted crop descriptors. With crop growth and enhanced depolarization effects, the CP SAR can capture the increasing volume power and decreasing surface power but at a lower rate than FP SAR. The m-δ and m-χ decompositions provide similar scattering components which differ from the Random Volume Over Ground (RVOG) decomposition. The third Stokes parameter g3 of the CP SAR data that indicates the strength of the circular polarization component is a common important parameter to infer the multiple crop parameters of interest. In agreement with the sensitivity analysis, better retrieval accuracies were obtained for height and dry biomass than VWC and LAI. For short vegetation such as soybean, full polarimetry is required to obtain the estimates of all four crop growth descriptors. On the contrary, for tall crop growth parameters, such as canola (height and dry biomass), corn (height, VWC, dry biomass), and wheat (LAI, VWC, dry biomass), the CP SAR features can provide comparable robust retrieval accuracy as the FP SAR features. This study deepens our insights into the CP SAR of the RADARSAT Constellation Mission (RCM) to timely monitor crop growth and health status.
© 2022 Elsevier Inc.\n
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\n \n\n \n \n \n \n \n \n .\n \n \n \n \n\n\n \n Sajid, S.; Chouinard, L.; Legeron, F.; Ude, T.; He, E.; and Ajrab, J.\n\n\n \n\n\n\n Volume 2677 . Reliability Analysis of Bridges for Autonomous Truck Platoons, pages 1071 - 1081. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ReliabilityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inbook{20230113339738 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Reliability Analysis of Bridges for Autonomous Truck Platoons},\njournal = {Transportation Research Record},\nauthor = {Sajid, Sikandar and Chouinard, Luc and Legeron, Frederic and Ude, Todd and He, Eddie and Ajrab, Jack},\nvolume = {2677},\nnumber = {1},\nyear = {2023},\npages = {1071 - 1081},\nissn = {03611981},\nabstract = {<div data-language="eng" data-ev-field="abstract">Autonomous truck platoon (ATP) deployment on road networks has recently attracted significant interest for its potential economic and environmental benefits. However, the impact of platooning on bridges is a concern because of the differences in their live load characteristics compared with those in the existing bridge design specifications. One of the primary aspects in the safe deployment of ATP is to evaluate the reliability of bridge designed using the existing provisions for live loads from potential configurations of ATP. An analysis procedure is proposed and demonstrated for a simple span steel composite bridge designed according to the existing design provisions. Given that many characteristics of the live load distribution such as the bias factor, coefficient of variation (CoV), and the dynamic amplification factor are presently not known for ATP, a parametric approach is used. The bias factor, dynamic amplification, and CoV are parametrized to calculate the live load distribution and quantify its impact on the reliability index. A two-truck platoon with different headway spacings constituted by different trucks in a single lane scenario is considered. The results indicate that the two single lane bridges designed according to existing design specifications are generally reliable (i.e., achieved the target reliability for which the bridge was initially designed) for the range of ATP live loads investigated when the CoV is less than 0.07, bias close to one and headway distances are above 17 ft. Future studies are suggested to include bridges with multiple spans, other bridge types, and a larger number of trucks in the platoons. The main contribution of this paper is to quantify the reliability indices of selected steel composite bridges designed using the existing specifications but subjected to various configurations of ATP loads and the influence of different components of the live load model attributed to the latter.<br/></div> © National Academy of Sciences: Transportation Research Board 2022.},\nkey = {Trucks},\n%keywords = {Automobiles;Composite bridges;Electric power plant loads;Reliability analysis;Specifications;},\n%note = {Autonomous truck;Bridge safety;Coefficients of variations;Composite steel bridges;Design specification;Live loads;Load distributions;Platooning;Steel composite bridges;Truck platoons;},\nURL = {http://dx.doi.org/10.1177/03611981221103235},\n} \n\n\n
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Autonomous truck platoon (ATP) deployment on road networks has recently attracted significant interest for its potential economic and environmental benefits. However, the impact of platooning on bridges is a concern because of the differences in their live load characteristics compared with those in the existing bridge design specifications. One of the primary aspects in the safe deployment of ATP is to evaluate the reliability of bridge designed using the existing provisions for live loads from potential configurations of ATP. An analysis procedure is proposed and demonstrated for a simple span steel composite bridge designed according to the existing design provisions. Given that many characteristics of the live load distribution such as the bias factor, coefficient of variation (CoV), and the dynamic amplification factor are presently not known for ATP, a parametric approach is used. The bias factor, dynamic amplification, and CoV are parametrized to calculate the live load distribution and quantify its impact on the reliability index. A two-truck platoon with different headway spacings constituted by different trucks in a single lane scenario is considered. The results indicate that the two single lane bridges designed according to existing design specifications are generally reliable (i.e., achieved the target reliability for which the bridge was initially designed) for the range of ATP live loads investigated when the CoV is less than 0.07, bias close to one and headway distances are above 17 ft. Future studies are suggested to include bridges with multiple spans, other bridge types, and a larger number of trucks in the platoons. The main contribution of this paper is to quantify the reliability indices of selected steel composite bridges designed using the existing specifications but subjected to various configurations of ATP loads and the influence of different components of the live load model attributed to the latter.
© National Academy of Sciences: Transportation Research Board 2022.\n
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\n \n\n \n \n \n \n \n \n Laboratory Measurement of Permeability in Postseismic Flow.\n \n \n \n \n\n\n \n Bayoumi, A.; Chekired, M.; and Karray, M.\n\n\n \n\n\n\n International Journal of Geomechanics, 23(3). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"LaboratoryPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20225213301989 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Laboratory Measurement of Permeability in Postseismic Flow},\njournal = {International Journal of Geomechanics},\nauthor = {Bayoumi, Aya and Chekired, Mohamed and Karray, Mourad},\nvolume = {23},\nnumber = {3},\nyear = {2023},\nissn = {15323641},\nabstract = {<div data-language="eng" data-ev-field="abstract">Permeability is a critical parameter that reflects the physical and mechanical states of soil. The variation in permeability through the liquefaction and postliquefaction phases is important in evaluating dynamic soil behavior and establishing adequate numerical models. This aspect has been addressed by several empirical methods. Conversely, in this study, the postseismic behavior of soil was investigated experimentally. Several undrained cyclic strain-controlled and permeability tests on Ottawa C-109 sand, 1-1.3 mm calibrated beads, and blank samples were performed. An experimental strategy is proposed after highlighting the major committed mistakes and factors affecting the permeability variation in a triaxial cell, i.e., the sample's diameter-to-height ratio, stone porosity, flow trajectory, tube diameter, and flow rate. This paper provides suggestions on the experimental setup signature, which frequently results in unreliable measurements. The permeability variation in the postseismic phase was measured during the time history of the excess pore pressure dissipation by following the falling head test rule. Permeability increased, reaching a peak of 2.5-3 times the initial value, and then decreased after a 50% regain of effective stress. The test results were verified by performing permeability tests before cyclic loading and after the dissipation process in triaxial conditions.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Soils},\n%keywords = {Mechanical permeability;Soil liquefaction;Soil testing;},\n%note = {Cyclic strain;Empirical method;Laboratory measurements;Measurements of;Mechanical state;Permeability test;Physical state;Post-liquefaction;Soil behaviors;Undrained;},\nURL = {http://dx.doi.org/10.1061/IJGNAI.GMENG-7715},\n} \n\n\n
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Permeability is a critical parameter that reflects the physical and mechanical states of soil. The variation in permeability through the liquefaction and postliquefaction phases is important in evaluating dynamic soil behavior and establishing adequate numerical models. This aspect has been addressed by several empirical methods. Conversely, in this study, the postseismic behavior of soil was investigated experimentally. Several undrained cyclic strain-controlled and permeability tests on Ottawa C-109 sand, 1-1.3 mm calibrated beads, and blank samples were performed. An experimental strategy is proposed after highlighting the major committed mistakes and factors affecting the permeability variation in a triaxial cell, i.e., the sample's diameter-to-height ratio, stone porosity, flow trajectory, tube diameter, and flow rate. This paper provides suggestions on the experimental setup signature, which frequently results in unreliable measurements. The permeability variation in the postseismic phase was measured during the time history of the excess pore pressure dissipation by following the falling head test rule. Permeability increased, reaching a peak of 2.5-3 times the initial value, and then decreased after a 50% regain of effective stress. The test results were verified by performing permeability tests before cyclic loading and after the dissipation process in triaxial conditions.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Identification of riverbank filtration sites at watershed scale: A geochemical and isotopic framework.\n \n \n \n \n\n\n \n Labelle, L.; Baudron, P.; Barbecot, F.; Bichai, F.; and Masse-Dufresne, J.\n\n\n \n\n\n\n Science of the Total Environment, 864. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"IdentificationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20225213300962 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Identification of riverbank filtration sites at watershed scale: A geochemical and isotopic framework},\njournal = {Science of the Total Environment},\nauthor = {Labelle, Laurence and Baudron, Paul and Barbecot, Florent and Bichai, Francoise and Masse-Dufresne, Janie},\nvolume = {864},\nyear = {2023},\nissn = {00489697},\nabstract = {<div data-language="eng" data-ev-field="abstract">Identifying groundwater wells performing riverbank filtration (RBF) is crucial to ensure safe drinking water through vulnerability assessment plans adapted to these hybrid water sources. Nonetheless, RBF is often unintentional or insufficiently documented and official inventories are scarce. We developed a user-friendly geochemical and isotopic framework for the in-situ identification of RBF facilities. It includes an interpretation abacus for non-specialists. While most studies using tracers are site-specific and/or based on discrete samples, we propose a novel multi-site characterization where time-series of EC, δ<sup>2</sup>H and δ<sup>18</sup>O are directly used as proxies of surface water infiltration at the watershed-scale. The basic statement is that time varying signal of raw water from a groundwater pumping facility reveals a significant induced infiltration of surface water. The framework was applied on nearly 2000 samples from 40 pumping wells and 4 neighboring rivers (<500 m), collected through collaborative sampling on a weekly to monthly basis for 18 months. Despite proximity to surface water, two-third of the complete dataset (19 facilities) were revealed not to benefit from significant contribution of surface water, demonstrating location criteria to be insufficient to identify RBF sites. Permanent RBF was evidenced at 5 facilities, where year-long seasonal variation of tracers in raw groundwater highlighted a continuous high proportion of infiltrated surface water. Unexpectedly, time-series also unveiled a third category: occasional RBF, where induced infiltration occurred only when specific hydrodynamic conditions were met (4 facilities). This study also provided concrete illustrations on how climate change may impact the efficiency of RBF to naturally attenuate microbiological contaminants and how geochemical and isotopic time-series considerably help at anticipating the evolution of contaminant attenuation capacity of RBF sites. Finally, by highlighting the existence of occasional RBF, this study tackles the common oversimplification that groundwater facilities can be binarily and classified either as RBF or groundwater.<br/></div> © 2022 Elsevier B.V.},\nkey = {Time series},\n%keywords = {Climate change;Groundwater;Infiltration;Isotopes;Potable water;Radial basis function networks;Surface waters;Water filtration;Water quality;Watersheds;},\n%note = {Collaborative water sampling;Environmental tracers;Geochemicals;Induced infiltrations;Riverbank filtration;Times series;Transient riverbank filtration;Vulnerability assessments;Water sampling;Watershed scale;},\nURL = {http://dx.doi.org/10.1016/j.scitotenv.2022.160964},\n} \n\n\n
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Identifying groundwater wells performing riverbank filtration (RBF) is crucial to ensure safe drinking water through vulnerability assessment plans adapted to these hybrid water sources. Nonetheless, RBF is often unintentional or insufficiently documented and official inventories are scarce. We developed a user-friendly geochemical and isotopic framework for the in-situ identification of RBF facilities. It includes an interpretation abacus for non-specialists. While most studies using tracers are site-specific and/or based on discrete samples, we propose a novel multi-site characterization where time-series of EC, δ2H and δ18O are directly used as proxies of surface water infiltration at the watershed-scale. The basic statement is that time varying signal of raw water from a groundwater pumping facility reveals a significant induced infiltration of surface water. The framework was applied on nearly 2000 samples from 40 pumping wells and 4 neighboring rivers (<500 m), collected through collaborative sampling on a weekly to monthly basis for 18 months. Despite proximity to surface water, two-third of the complete dataset (19 facilities) were revealed not to benefit from significant contribution of surface water, demonstrating location criteria to be insufficient to identify RBF sites. Permanent RBF was evidenced at 5 facilities, where year-long seasonal variation of tracers in raw groundwater highlighted a continuous high proportion of infiltrated surface water. Unexpectedly, time-series also unveiled a third category: occasional RBF, where induced infiltration occurred only when specific hydrodynamic conditions were met (4 facilities). This study also provided concrete illustrations on how climate change may impact the efficiency of RBF to naturally attenuate microbiological contaminants and how geochemical and isotopic time-series considerably help at anticipating the evolution of contaminant attenuation capacity of RBF sites. Finally, by highlighting the existence of occasional RBF, this study tackles the common oversimplification that groundwater facilities can be binarily and classified either as RBF or groundwater.
© 2022 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Design and Detailing Recommendations of Slotted-Hidden-Gap Connection for Square HSS Brace Members.\n \n \n \n \n\n\n \n Afifi, M.; Tremblay, R.; and Rogers, C. A.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 149(2). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"DesignPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20225013243252 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design and Detailing Recommendations of Slotted-Hidden-Gap Connection for Square HSS Brace Members},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Afifi, Mohamed and Tremblay, Robert and Rogers, Colin A.},\nvolume = {149},\nnumber = {2},\nyear = {2023},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">The slotted-hidden-gap (SHG) connection eliminates the need to reinforce the slot region of hollow structural sections (HSS) braces of concentrically braced frames (CBFs). However, the existing design approach for SHG connections is rather empirical and limited by the range of the connection geometries and materials that had previously been tested. A general design approach based on the findings of a large-scale parametric study is presented in this paper, where the most critical parameters of the connection were varied. Different weld configurations were investigated to examine the effect of shear lag on the overall performance of the brace. The inelastic performance of SHG-connected braces designed using the proposed approach was validated by means of numerically simulating the resulting braces and connections and subjecting them to a reversed-cyclic loading protocol. The simulated braces were able to attain their yield tensile resistance and fracture away from the connection region while sustaining an axial deformation corresponding to an average story drift of 5.43%. The proposed design and detailing method was, as such, found to be effective in the design of square HSS SHG connection braces ranging in size and steel grade.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Numerical methods},\n%keywords = {Shear flow;},\n%note = {Concentrically braced frames;Connection geometry;Design approaches;Design method;General designs;Hollow structural section;Hollow structural sections;Performance;Steel braces;Welded connections;},\nURL = {http://dx.doi.org/10.1061/JSENDH.STENG-11609},\n} \n\n\n
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The slotted-hidden-gap (SHG) connection eliminates the need to reinforce the slot region of hollow structural sections (HSS) braces of concentrically braced frames (CBFs). However, the existing design approach for SHG connections is rather empirical and limited by the range of the connection geometries and materials that had previously been tested. A general design approach based on the findings of a large-scale parametric study is presented in this paper, where the most critical parameters of the connection were varied. Different weld configurations were investigated to examine the effect of shear lag on the overall performance of the brace. The inelastic performance of SHG-connected braces designed using the proposed approach was validated by means of numerically simulating the resulting braces and connections and subjecting them to a reversed-cyclic loading protocol. The simulated braces were able to attain their yield tensile resistance and fracture away from the connection region while sustaining an axial deformation corresponding to an average story drift of 5.43%. The proposed design and detailing method was, as such, found to be effective in the design of square HSS SHG connection braces ranging in size and steel grade.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n A new Distinct Element meso-model for simulating the rocking-dominated seismic response of RC columns.\n \n \n \n \n\n\n \n Scattarreggia, N.; Malomo, D.; and DeJong, M. J.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 52(3): 828 - 838. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20225013221625 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A new Distinct Element meso-model for simulating the rocking-dominated seismic response of RC columns},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Scattarreggia, Nicola and Malomo, Daniele and DeJong, Matthew J.},\nvolume = {52},\nnumber = {3},\nyear = {2023},\npages = {828 - 838},\nissn = {00988847},\nabstract = {<div data-language="eng" data-ev-field="abstract">The rocking-dominated seismic response of reinforced concrete (RC) columns is a complex mechanism that entails P-Δ effects, concrete crushing and spalling, rupture and dislocation of steel bars and stirrups, as well as combined localized failures causing splitting and shear-flexure cracking. In this paper, we present a new meso-scale numerical modeling strategy for the detailed simulation of the rocking response of slender RC columns under seismic actions. This work advances the current state-of-the-art by exploring the unprecedented use of the Distinct Element Method (DEM), originally conceived for geotechnical studies and whose applicability in earthquake engineering has been primarily limited to the assessment of unreinforced masonry sub-structures. To decrease analysis time and enable the use of DEM for RC problems, concrete is herein idealized as an assembly of solid macro-block layers of size directly proportional to their distance from expected plastic hinges. These layers are connected by nonlinear interface springs to simulate tensile and shear cracking via a simplified Mohr-Coulomb criterion. Crushing of concrete in deformable blocks is modeled using the Feenstra and De Borst strain-softening linearized compression law, while confinement and combined failures are accounted for numerically through the explicit representation of longitudinal and transversal reinforcement bars, idealized as link elements. Previous experimental static and dynamic tests on full-scale RC column specimens and results from fiber-based Finite Element and sectional analysis models are used to evaluate DEM results and quantify the influence of key modeling parameters, including block number and deformability, as well as the amount of damping. The agreement between simulated failure modes and force and displacement capacities and their experimental counterparts demonstrate the applicability of the proposed approach, while demonstrating the pros and cons of simplified numerical methods.<br/></div> © 2022 John Wiley & Sons Ltd.},\nkey = {Seismic response},\n%keywords = {Crushing;Deformation;Earthquake engineering;Numerical methods;Numerical models;Reinforced concrete;Shear flow;},\n%note = {Complex mechanisms;Concrete crushing;Concrete spalling;Discrete element models;Distinct element methods;Distinct elements;Reinforced concrete column;Rocking;Seismic analysis;Steel bars;},\nURL = {http://dx.doi.org/10.1002/eqe.3782},\n} \n\n\n
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The rocking-dominated seismic response of reinforced concrete (RC) columns is a complex mechanism that entails P-Δ effects, concrete crushing and spalling, rupture and dislocation of steel bars and stirrups, as well as combined localized failures causing splitting and shear-flexure cracking. In this paper, we present a new meso-scale numerical modeling strategy for the detailed simulation of the rocking response of slender RC columns under seismic actions. This work advances the current state-of-the-art by exploring the unprecedented use of the Distinct Element Method (DEM), originally conceived for geotechnical studies and whose applicability in earthquake engineering has been primarily limited to the assessment of unreinforced masonry sub-structures. To decrease analysis time and enable the use of DEM for RC problems, concrete is herein idealized as an assembly of solid macro-block layers of size directly proportional to their distance from expected plastic hinges. These layers are connected by nonlinear interface springs to simulate tensile and shear cracking via a simplified Mohr-Coulomb criterion. Crushing of concrete in deformable blocks is modeled using the Feenstra and De Borst strain-softening linearized compression law, while confinement and combined failures are accounted for numerically through the explicit representation of longitudinal and transversal reinforcement bars, idealized as link elements. Previous experimental static and dynamic tests on full-scale RC column specimens and results from fiber-based Finite Element and sectional analysis models are used to evaluate DEM results and quantify the influence of key modeling parameters, including block number and deformability, as well as the amount of damping. The agreement between simulated failure modes and force and displacement capacities and their experimental counterparts demonstrate the applicability of the proposed approach, while demonstrating the pros and cons of simplified numerical methods.
© 2022 John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Estimation of Vertical Peak Floor Acceleration Demands in Elastic RC Moment-Resisting Frame Buildings.\n \n \n \n \n\n\n \n Mazloom, S.; and Assi, R.\n\n\n \n\n\n\n Journal of Earthquake Engineering, 27(13): 3753 - 3785. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"EstimationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224813199642 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Estimation of Vertical Peak Floor Acceleration Demands in Elastic RC Moment-Resisting Frame Buildings},\njournal = {Journal of Earthquake Engineering},\nauthor = {Mazloom, Shahabaldin and Assi, Rola},\nvolume = {27},\nnumber = {13},\nyear = {2023},\npages = {3753 - 3785},\nissn = {13632469},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper assesses the vertical seismic accelerations in four 3-D elastic RC moment-resisting frame buildings with limited ductility, designed according to the National Building Code of Canada (NBC 2015). 65 near-fault strong motions recorded on dense soil were considered. The greatest amount of amplification of vertical acceleration was observed at the center of the buildings’ interior slab, with maximum median normalized values ranging from 4.0, in the 3-storey building, to 1.24, in the 12-storey building. This study indicates that the vertical earthquake motion should not be overlooked in the analysis and design process, especially in low-rise buildings.<br/></div> © 2022 Taylor & Francis Group, LLC.},\nkey = {Reinforced concrete},\n%keywords = {Acceleration;Building codes;Buildings;Codes (symbols);Floors;Structural frames;},\n%note = {Amplification of acceleration;Floor accelerations;Frame systems;Moment resisting frames;Non-structural component;Non-structural components;Peak floor;Peak ground acceleration;Reinforced concrete moment-resisting frame system;Vertical peak floor acceleration (PFAv);Vertical peak ground acceleration (PGAv);},\nURL = {http://dx.doi.org/10.1080/13632469.2022.2148018},\n} \n\n\n
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This paper assesses the vertical seismic accelerations in four 3-D elastic RC moment-resisting frame buildings with limited ductility, designed according to the National Building Code of Canada (NBC 2015). 65 near-fault strong motions recorded on dense soil were considered. The greatest amount of amplification of vertical acceleration was observed at the center of the buildings’ interior slab, with maximum median normalized values ranging from 4.0, in the 3-storey building, to 1.24, in the 12-storey building. This study indicates that the vertical earthquake motion should not be overlooked in the analysis and design process, especially in low-rise buildings.
© 2022 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n Sustainability assessment model for heritage buildings.\n \n \n \n \n\n\n \n Al-Sakkaf, A.; Bagchi, A.; Zayed, T.; and Mahmoud, S.\n\n\n \n\n\n\n Smart and Sustainable Built Environment, 12(1): 105 - 127. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"SustainabilityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224413046141 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Sustainability assessment model for heritage buildings},\njournal = {Smart and Sustainable Built Environment},\nauthor = {Al-Sakkaf, Abobakr and Bagchi, Ashutosh and Zayed, Tarek and Mahmoud, Sherif},\nvolume = {12},\nnumber = {1},\nyear = {2023},\npages = {105 - 127},\nissn = {20466099},\nabstract = {<div data-language="eng" data-ev-field="abstract">Purpose: The purpose of this research is to focus on the evaluation of heritage buildings' sustainability. BIM modeling was necessary for the design of the sustainability assessment model for Heritage Buildings (SAHB). Using ArchiCAD®, energy simulations were performed for two case studies (Murabba Palace, Saudi Arabia, and Grey Nuns Building, Canada), and the developed model was validated through sensitivity analysis. Design/methodology/approach: Heritage buildings (HBs) are unique and must be preserved for future generations. This article focuses on a sustainability assessment model and rating scale for heritage buildings in light of the need for their conservation. Regional variations were considered in the model development to identify critical attributes whose corresponding weights were then determined by fuzzy logic. Data was collected via questionnaires completed by Saudi Arabian and Canadian experts, and Fuzzy TOPSIS was also applied to eliminate the uncertainties present when human opinions are involved. Findings: Results showed that regional variations were sufficiently addressed through the multi-level weight consideration in the proposed model. Comparing the nine identified factors that affect the sustainability of HBs, energy and indoor environmental quality were of equal weight in both case studies. Originality/value: This study will be helpful for the design of a globally applicable sustainability assessment model for HBs. It will also enable decision-makers to prepare maintenance plans for HBs.<br/></div> © 2021, Emerald Publishing Limited.},\nkey = {Sustainable development},\n%keywords = {Architectural design;Decision making;Fuzzy logic;Historic preservation;Sensitivity analysis;Surveys;},\n%note = {Assessment;Assessment models;Case-studies;Energy;Energy simulation;Heritage architectures;Heritage buildings;Rating system;Regional variation;Sustainability assessment;},\nURL = {http://dx.doi.org/10.1108/SASBE-03-2021-0049},\n} \n\n\n
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Purpose: The purpose of this research is to focus on the evaluation of heritage buildings' sustainability. BIM modeling was necessary for the design of the sustainability assessment model for Heritage Buildings (SAHB). Using ArchiCAD®, energy simulations were performed for two case studies (Murabba Palace, Saudi Arabia, and Grey Nuns Building, Canada), and the developed model was validated through sensitivity analysis. Design/methodology/approach: Heritage buildings (HBs) are unique and must be preserved for future generations. This article focuses on a sustainability assessment model and rating scale for heritage buildings in light of the need for their conservation. Regional variations were considered in the model development to identify critical attributes whose corresponding weights were then determined by fuzzy logic. Data was collected via questionnaires completed by Saudi Arabian and Canadian experts, and Fuzzy TOPSIS was also applied to eliminate the uncertainties present when human opinions are involved. Findings: Results showed that regional variations were sufficiently addressed through the multi-level weight consideration in the proposed model. Comparing the nine identified factors that affect the sustainability of HBs, energy and indoor environmental quality were of equal weight in both case studies. Originality/value: This study will be helpful for the design of a globally applicable sustainability assessment model for HBs. It will also enable decision-makers to prepare maintenance plans for HBs.
© 2021, Emerald Publishing Limited.\n
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\n \n\n \n \n \n \n \n \n Proposed Development Length Equations for GFRP Bars in Flexural Reinforced Concrete Members.\n \n \n \n \n\n\n \n Gouda, O.; Hassanein, A.; and Galal, K.\n\n\n \n\n\n\n Journal of Composites for Construction, 27(1). 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ProposedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224713152404 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Proposed Development Length Equations for GFRP Bars in Flexural Reinforced Concrete Members},\njournal = {Journal of Composites for Construction},\nauthor = {Gouda, Omar and Hassanein, Ahmed and Galal, Khaled},\nvolume = {27},\nnumber = {1},\nyear = {2023},\nissn = {10900268},\nabstract = {<div data-language="eng" data-ev-field="abstract">The bond at the interface between concrete and the surface of a glass fiber-reinforced polymer (GFRP) bar is the most critical parameter to ensure that the strains between the GFRP bar and the surrounding concrete are compatible. To prevent bond failure, an adequate development length should be provided. This study evaluated the current recommended equations for the development length using an approach based on the regression analysis of an experimental database of results from 431 recent tests of beam bonding reported in the literature. The main objective of this work is to optimize the development length equation through a comprehensive assessment of the influencing parameters. The parameters studied in this investigation are the concrete compressive strength, concrete cover, confinement effect, bar diameter, bar location, bar surface profile, and bar tensile stress. The proposed equations were compared with the equations in current design codes.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Reinforced concrete},\n%keywords = {Compressive strength;Fiber reinforced plastics;Regression analysis;},\n%note = {'current;Bond failure;Bond strength;Comprehensive assessment;Concrete compressive strength;Development length;Experimental database;Flexural reinforced concrete members;Glass-fiber reinforced polymer bars;Influencing parameters;},\nURL = {http://dx.doi.org/10.1061/(ASCE)CC.1943-5614.0001272},\n} \n\n\n
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The bond at the interface between concrete and the surface of a glass fiber-reinforced polymer (GFRP) bar is the most critical parameter to ensure that the strains between the GFRP bar and the surrounding concrete are compatible. To prevent bond failure, an adequate development length should be provided. This study evaluated the current recommended equations for the development length using an approach based on the regression analysis of an experimental database of results from 431 recent tests of beam bonding reported in the literature. The main objective of this work is to optimize the development length equation through a comprehensive assessment of the influencing parameters. The parameters studied in this investigation are the concrete compressive strength, concrete cover, confinement effect, bar diameter, bar location, bar surface profile, and bar tensile stress. The proposed equations were compared with the equations in current design codes.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Design of mono-symmetric I-sections under combined load cases by the Overall Interaction Concept.\n \n \n \n \n\n\n \n Li, L.; and Boissonnade, N.\n\n\n \n\n\n\n Thin-Walled Structures, 182. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"DesignPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224513071580 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design of mono-symmetric I-sections under combined load cases by the Overall Interaction Concept},\njournal = {Thin-Walled Structures},\nauthor = {Li, Liya and Boissonnade, Nicolas},\nvolume = {182},\nyear = {2023},\nissn = {02638231},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper reports on in-depth finite element analyses relative to the local buckling behaviour and ultimate resistance of mono-symmetric I-sections under combined load cases. Non-linear numerical models are first developed and validated against existing test results and then used to carry out extensive parametric studies considering wide ranges of steel grades, section slenderness, mono-symmetric degrees and loading situations. The numerical results are used as references to analyse the structural performance of hot-rolled and welded mono-symmetric I-sections under combined load cases, and to assess the accuracy of design equations based on the Overall Interaction Concept (O.I.C.) approach. The O.I.C.-based proposal is shown to yield accurate, consistent and continuous resistance predictions; conversely, both Eurocode 3 and AISC 360 reveal over-conservative predictions. Finally, a statistical analysis following the guidelines of EN 1990 is performed, quantifying the reliability level of the proposed O.I.C. approach.<br/></div> © 2022},\nkey = {Hot rolling},\n%keywords = {Hot rolled steel;Reliability analysis;},\n%note = {Buckling behaviour;Combined load case;Finite element analyse;I-sections;Interaction concepts;Local buckling;Mono-symmetric I-section;Overall interaction concept;Symmetrics;Ultimate resistance;},\nURL = {http://dx.doi.org/10.1016/j.tws.2022.110280},\n} \n\n\n
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This paper reports on in-depth finite element analyses relative to the local buckling behaviour and ultimate resistance of mono-symmetric I-sections under combined load cases. Non-linear numerical models are first developed and validated against existing test results and then used to carry out extensive parametric studies considering wide ranges of steel grades, section slenderness, mono-symmetric degrees and loading situations. The numerical results are used as references to analyse the structural performance of hot-rolled and welded mono-symmetric I-sections under combined load cases, and to assess the accuracy of design equations based on the Overall Interaction Concept (O.I.C.) approach. The O.I.C.-based proposal is shown to yield accurate, consistent and continuous resistance predictions; conversely, both Eurocode 3 and AISC 360 reveal over-conservative predictions. Finally, a statistical analysis following the guidelines of EN 1990 is performed, quantifying the reliability level of the proposed O.I.C. approach.
© 2022\n
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\n \n\n \n \n \n \n \n \n Performance-based design for improving impact resistance of RC bridge piers with CFRP grid-reinforced ECC.\n \n \n \n \n\n\n \n Zhou, C.; Xie, Y.; Wang, W.; and Zheng, Y.\n\n\n \n\n\n\n Engineering Structures, 275. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"Performance-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224613098361 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance-based design for improving impact resistance of RC bridge piers with CFRP grid-reinforced ECC},\njournal = {Engineering Structures},\nauthor = {Zhou, Chang and Xie, Yazhou and Wang, Wenwei and Zheng, Yuzhou},\nvolume = {275},\nyear = {2023},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study explores the performance-based design of a composite material named carbon fiber reinforced polymer (CFRP) grid-reinforced engineering cementitious composite (ECC) to improve the impact resistance of reinforced concrete (RC) bridge piers. The finite element (FE) model of a benchmark bridge with its pier strengthened with CFRP grid-reinforced ECC is built in LS-DYNA, whereas a medium truck model is employed to impose the impact loading. The accuracy of the FE model is verified against (1) experimental results of a scaled column colliding with a moving truck and (2) the pier damage observed after a real-world bridge-truck collision accident. Subsequently, numerous FE analyses are conducted to (1) identify the accumulation of shear damage under the sequence of engine-cargo impacts, (2) pinpoint flexural damage at different column heights, and (3) derive closed-form expressions to quantify the shear/flexural demand parameters under different truck loads, and the associated intact and residual capacity models provided by the composite pier. These demand/capacity parameters are further utilized to compute shear and flexural-based damage indexes to quantify distinct damage modes and damage states by developing a series of limit state models. To this end, a complete performance-based collision design workflow is devised to strengthen the existing RC bridge piers using the CFRP grid-reinforced ECC composite material. Two case studies are further carried out to verify the effectiveness of the proposed design framework, which provides a sound reference for both researchers and practitioners to employ the CFRP-ECC composite material as a viable retrofit measure to enhance the impact resilience of RC bridge piers.<br/></div> © 2022 Elsevier Ltd},\nkey = {Trucks},\n%keywords = {Bridge piers;Carbon fiber reinforced plastics;Damage detection;Piers;Reinforced concrete;},\n%note = {Carbon fiber reinforced polymer;Carbon fibre reinforced polymer;Damage evaluation;Damage evaluation approach;Engineered cementitious composite;Engineered cementitious composites;Evaluation approach;Performance based design;Strengthen;Truck-bridge collision;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.115217},\n} \n\n\n
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This study explores the performance-based design of a composite material named carbon fiber reinforced polymer (CFRP) grid-reinforced engineering cementitious composite (ECC) to improve the impact resistance of reinforced concrete (RC) bridge piers. The finite element (FE) model of a benchmark bridge with its pier strengthened with CFRP grid-reinforced ECC is built in LS-DYNA, whereas a medium truck model is employed to impose the impact loading. The accuracy of the FE model is verified against (1) experimental results of a scaled column colliding with a moving truck and (2) the pier damage observed after a real-world bridge-truck collision accident. Subsequently, numerous FE analyses are conducted to (1) identify the accumulation of shear damage under the sequence of engine-cargo impacts, (2) pinpoint flexural damage at different column heights, and (3) derive closed-form expressions to quantify the shear/flexural demand parameters under different truck loads, and the associated intact and residual capacity models provided by the composite pier. These demand/capacity parameters are further utilized to compute shear and flexural-based damage indexes to quantify distinct damage modes and damage states by developing a series of limit state models. To this end, a complete performance-based collision design workflow is devised to strengthen the existing RC bridge piers using the CFRP grid-reinforced ECC composite material. Two case studies are further carried out to verify the effectiveness of the proposed design framework, which provides a sound reference for both researchers and practitioners to employ the CFRP-ECC composite material as a viable retrofit measure to enhance the impact resilience of RC bridge piers.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n A web-based system for satellite-based high-resolution global soil moisture maps.\n \n \n \n \n\n\n \n Khazaei, M.; Hamzeh, S.; Samani, N. N.; Muhuri, A.; Goita, K.; and Weng, Q.\n\n\n \n\n\n\n Computers and Geosciences, 170. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224413051724 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A web-based system for satellite-based high-resolution global soil moisture maps},\njournal = {Computers and Geosciences},\nauthor = {Khazaei, Morteza and Hamzeh, Saeid and Samani, Najmeh Neysani and Muhuri, Arnab and Goita, Kalifa and Weng, Qihao},\nvolume = {170},\nyear = {2023},\nissn = {00983004},\nabstract = {<div data-language="eng" data-ev-field="abstract">Nowadays, a wide range of applications require near-real-time Surface Soil Moisture (SSM) data at high spatial resolution. However, operational passive microwave systems like SMOS and SMAP can only acquire such information at a relatively coarser resolution. Therefore, several downscaling algorithms have been developed to address this issue and provide SSM maps at a finer spatial scale. Users may, however, find it difficult to implement the downscaling algorithm due to the complexity of integrating various data sources. Disaggregation based on Physical and Theoretical scale Change (DisPATCh) is one of the algorithms that is widely accepted to downscale passive microwave SSM observations. But the complexity of modeling, the variety of data sources and formats of input data make it very difficult for users to implement the algorithm. Thus, we developed a Satellite-based Hydrological Monitoring System (SHMS), which facilitates this gap through the implementation of the DisPATCh algorithm to generate large-scale SSM maps with high resolution, which is achieved by combining SMAP and MODIS products. The System Usability Scale (SUS) method was used to evaluate the system's strengths and weaknesses. The SUS evaluation results show that 74.75% of SHMS users are satisfied with the system's performance.<br/></div> © 2022 Elsevier Ltd},\nkey = {Soil moisture},\n%keywords = {Radiometers;Websites;},\n%note = {Disaggregation;High resolution;MODIS;Passive microwaves;SMAP;SMOS;Soil moisture disaggregation;Soil moisture maps;Surface soil moisture;Web-based system;},\nURL = {http://dx.doi.org/10.1016/j.cageo.2022.105250},\n} \n\n\n
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Nowadays, a wide range of applications require near-real-time Surface Soil Moisture (SSM) data at high spatial resolution. However, operational passive microwave systems like SMOS and SMAP can only acquire such information at a relatively coarser resolution. Therefore, several downscaling algorithms have been developed to address this issue and provide SSM maps at a finer spatial scale. Users may, however, find it difficult to implement the downscaling algorithm due to the complexity of integrating various data sources. Disaggregation based on Physical and Theoretical scale Change (DisPATCh) is one of the algorithms that is widely accepted to downscale passive microwave SSM observations. But the complexity of modeling, the variety of data sources and formats of input data make it very difficult for users to implement the algorithm. Thus, we developed a Satellite-based Hydrological Monitoring System (SHMS), which facilitates this gap through the implementation of the DisPATCh algorithm to generate large-scale SSM maps with high resolution, which is achieved by combining SMAP and MODIS products. The System Usability Scale (SUS) method was used to evaluate the system's strengths and weaknesses. The SUS evaluation results show that 74.75% of SHMS users are satisfied with the system's performance.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n RC Wall-Slab Connection Reinforced by FRP: Mechanical Behaviour Under Cycling Loading.\n \n \n \n \n\n\n \n Chalot, A.; Michel, L.; Ferrier, E.; and Roy, N.\n\n\n \n\n\n\n In volume 278, pages 433 - 440, Sherbrooke, QC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"RCPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20224413016664 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {RC Wall-Slab Connection Reinforced by FRP: Mechanical Behaviour Under Cycling Loading},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Chalot, Antoine and Michel, Laurent and Ferrier, Emmanuel and Roy, Nathalie},\nvolume = {278},\nyear = {2023},\npages = {433 - 440},\nissn = {23662557},\naddress = {Sherbrooke, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents the results of 2 tests of slab/wall connections reinforced with composite materials. The full-scale tests are carried on X-shaped connections. Joint connects RC wall and RC continuous floors. Design approach (geometry and steel rebars) is carried out in accordance with European standard. Reinforcement are made using CFRP, GFRP and carbon anchors. In order to study the mechanical behaviour of the joint, displacement sensor, load cells, strain gauge and digital image correlation are put in place. After analysis of the results, composite reinforcement increase the bond strength by 80% and the ductility by 70%. Failure mode is modified (bending failure to shearing failure). Strengthening increase the energy dissipation of the connection by 400%. Results show that composite reinforcement is a good solution for making structures safe from seismic actions.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Anchors},\n%keywords = {Energy dissipation;Image correlation;Reinforcement;Seismology;Strain gages;Strengthening (metal);},\n%note = {Composite reinforcement;Cycling loading;Experimental study;Full-scale;GFRP;Mechanical behavior;Seismic application;Slab connections;Strengthening;Wall-slab;},\nURL = {http://dx.doi.org/10.1007/978-3-031-09632-7_50},\n} \n\n\n
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This paper presents the results of 2 tests of slab/wall connections reinforced with composite materials. The full-scale tests are carried on X-shaped connections. Joint connects RC wall and RC continuous floors. Design approach (geometry and steel rebars) is carried out in accordance with European standard. Reinforcement are made using CFRP, GFRP and carbon anchors. In order to study the mechanical behaviour of the joint, displacement sensor, load cells, strain gauge and digital image correlation are put in place. After analysis of the results, composite reinforcement increase the bond strength by 80% and the ductility by 70%. Failure mode is modified (bending failure to shearing failure). Strengthening increase the energy dissipation of the connection by 400%. Results show that composite reinforcement is a good solution for making structures safe from seismic actions.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Ultrasonic characterization of frozen soils using a multiphase poromechanical approach.\n \n \n \n \n\n\n \n Liu, H.; Maghoul, P.; Shalaby, A.; and Thomson, D.\n\n\n \n\n\n\n Computers and Geotechnics, 153. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"UltrasonicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224313000814 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Ultrasonic characterization of frozen soils using a multiphase poromechanical approach},\njournal = {Computers and Geotechnics},\nauthor = {Liu, Hongwei and Maghoul, Pooneh and Shalaby, Ahmed and Thomson, Douglas},\nvolume = {153},\nyear = {2023},\nissn = {0266352X},\nabstract = {<div data-language="eng" data-ev-field="abstract">The ability to quantitatively and non-invasively characterize complex multiphase geomaterials is still a major challenge to the engineering, construction, and geophysical fields. In the context of accelerating climate change, construction on permafrost requires remedial measures and an appropriate characterization of permafrost (e.g., ice content, unfrozen water content, porosity, ice lenses, soil type, and mechanical properties). Current techniques are insufficient for efficient characterization of permafrost samples. Here, we propose an ultrasonic sensing technique and a signal interpretation method based on an inverse multiphase poromechanical approach to overcome critical gaps in permafrost characterization. This technique allows us to interpret the measured electrical signal using a theoretical transfer function obtained through an efficient multiphase poromechanical forward solver. Our study demonstrates the potential of the ultrasonic sensing technique for the rapid characterization of permafrost samples in terms of both physical and mechanical properties.<br/></div> © 2022 Elsevier Ltd},\nkey = {Climate change},\n%keywords = {Ice;Permafrost;Porosity;Transfer functions;Ultrasonic applications;},\n%note = {Dynamics properties;Ice content;Inversion;Multiphases;Poro-elasticity;Sensing techniques;Spectral element method;Ultrasonic characterization;Ultrasonic sensing;Unfrozen water contents;},\nURL = {http://dx.doi.org/10.1016/j.compgeo.2022.105068},\n} \n\n\n
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The ability to quantitatively and non-invasively characterize complex multiphase geomaterials is still a major challenge to the engineering, construction, and geophysical fields. In the context of accelerating climate change, construction on permafrost requires remedial measures and an appropriate characterization of permafrost (e.g., ice content, unfrozen water content, porosity, ice lenses, soil type, and mechanical properties). Current techniques are insufficient for efficient characterization of permafrost samples. Here, we propose an ultrasonic sensing technique and a signal interpretation method based on an inverse multiphase poromechanical approach to overcome critical gaps in permafrost characterization. This technique allows us to interpret the measured electrical signal using a theoretical transfer function obtained through an efficient multiphase poromechanical forward solver. Our study demonstrates the potential of the ultrasonic sensing technique for the rapid characterization of permafrost samples in terms of both physical and mechanical properties.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Evaluation of Different CFRP Sandwich Deck Cores of Deployable Treadway Bridge Beam.\n \n \n \n \n\n\n \n Osman, A.; and Galal, K.\n\n\n \n\n\n\n In volume 278, pages 469 - 479, Sherbrooke, QC, Canada, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"EvaluationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20224413016668 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evaluation of Different CFRP Sandwich Deck Cores of Deployable Treadway Bridge Beam},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Osman, Ashraf and Galal, Khaled},\nvolume = {278},\nyear = {2023},\npages = {469 - 479},\nissn = {23662557},\naddress = {Sherbrooke, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The increasing rate of the world natural disasters increased the importance of the aftermath rapid mobility. This led to the necessity of using effective deployable bridge systems in terms of weight to capacity ratio. A composite bridge deck possesses a remarkable share of a bridge superstructure’s weight. The objective of this study is to produce CFRP webbed core sandwich decks that are effective in strength to areal weight ratio compared to the military Composite Assault Bridge (CAB) deck system. Another aim of the study is to achieve the target capacity performance while not using a special expensive matrix formulation. Two potential CFRP sandwich deck configurations are considered. The buckling capacity of the core webs is enhanced using different structural shapes of the CFRP construction. The common configuration of the cores consists of several honeycomb polyisocyanurate foam beams placed parallel to each other. The honeycomb foam beams are placed between two upper and lower carbon/epoxy skins to hold the whole core together. The experimental program included coupon testing to quantify the mechanical properties of the used carbon/epoxy material, a flatwise compression test, three-point loading test, and finally a microscopic analysis to estimate the fiber volume fraction of the manufactured webbed core samples and to verify the adequacy of the used manufactured technique and infusion strategy. The test results showed promising values of shear and compression strength to areal weight ratio at least by 1.5 times and 0.99 times, respectively, compared to the CAB deck system. The configuration that showed the promising results for ultimate strength capacities is chosen as a candidate for further parametric analysis and design with the deployable bridge tread-way.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Compression testing},\n%keywords = {Bridge decks;Carbon;Disaster prevention;Disasters;Foams;Honeycomb structures;Nondestructive examination;Software testing;},\n%note = {Bridge beams;Bridge deck system;CFRP sandwich core;Deck beam;Deployable bridge;Disaster relief;MLC;Sandwich cores;Sandwich deck;Weight ratios;},\nURL = {http://dx.doi.org/10.1007/978-3-031-09632-7_54},\n} \n\n\n
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The increasing rate of the world natural disasters increased the importance of the aftermath rapid mobility. This led to the necessity of using effective deployable bridge systems in terms of weight to capacity ratio. A composite bridge deck possesses a remarkable share of a bridge superstructure’s weight. The objective of this study is to produce CFRP webbed core sandwich decks that are effective in strength to areal weight ratio compared to the military Composite Assault Bridge (CAB) deck system. Another aim of the study is to achieve the target capacity performance while not using a special expensive matrix formulation. Two potential CFRP sandwich deck configurations are considered. The buckling capacity of the core webs is enhanced using different structural shapes of the CFRP construction. The common configuration of the cores consists of several honeycomb polyisocyanurate foam beams placed parallel to each other. The honeycomb foam beams are placed between two upper and lower carbon/epoxy skins to hold the whole core together. The experimental program included coupon testing to quantify the mechanical properties of the used carbon/epoxy material, a flatwise compression test, three-point loading test, and finally a microscopic analysis to estimate the fiber volume fraction of the manufactured webbed core samples and to verify the adequacy of the used manufactured technique and infusion strategy. The test results showed promising values of shear and compression strength to areal weight ratio at least by 1.5 times and 0.99 times, respectively, compared to the CAB deck system. The configuration that showed the promising results for ultimate strength capacities is chosen as a candidate for further parametric analysis and design with the deployable bridge tread-way.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Experimental investigation of pre-damaged circular RC columns strengthened with fabric-reinforced cementitious matrix (FRCM).\n \n \n \n \n\n\n \n Tello, N.; Abed, F.; ElRefai, A.; El-Maaddawy, T.; and Alhoubi, Y.\n\n\n \n\n\n\n Structural Concrete, 24(1): 1656 - 1669. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224312988224 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental investigation of pre-damaged circular RC columns strengthened with fabric-reinforced cementitious matrix (FRCM)},\njournal = {Structural Concrete},\nauthor = {Tello, Noor and Abed, Farid and ElRefai, Ahmed and El-Maaddawy, Tamer and Alhoubi, Yazan},\nvolume = {24},\nnumber = {1},\nyear = {2023},\npages = {1656 - 1669},\nissn = {14644177},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper aims at investigating the efficiency of strengthening pre-damaged circular reinforced concrete (RC) columns with Polyparaphenylene Benzobisoxazole fabric-reinforced cementitious matrix (PBO-FRCM). The investigated parameters were the degree of pre-damage (non-damaged, damaged monotonically up to yielding, or fatigue damaged), the number of PBO-FRCM layers (0, 2, or 4), and the tie spacing (180 or 90 mm). The experimental results of testing 12 short columns under axial compression showed that PBO-FRCM systems enhanced the capacity of the non-damaged columns and successfully restored and further enhanced the capacity of the pre-damaged columns. Columns strengthened with two and four PBO-FRCM layers showed a gain in the capacity of up to 40% and 75%, respectively. Furthermore, PBO-FRCM wrapping enhanced the ductility of both the non-damaged and the pre-damaged columns, in which ductility improvement was more noticeable in columns with the larger tie spacing. Finally, the theoretical load-carrying capacity calculated using ACI 549 provisions showed a good agreement with the experimental capacity of all tested columns.<br/></div> © 2022 International Federation for Structural Concrete.},\nkey = {Ductility},\n%keywords = {Reinforced concrete;},\n%note = {Cementitious matrices;Circular columns;Concentric loading;Damaged columns;Fabric-reinforced cementitious matrix;PBO;Polyparaphenylenes;Pre-damaged;Reinforced concrete column;Strengthening;},\nURL = {http://dx.doi.org/10.1002/suco.202200333},\n} \n\n\n
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This paper aims at investigating the efficiency of strengthening pre-damaged circular reinforced concrete (RC) columns with Polyparaphenylene Benzobisoxazole fabric-reinforced cementitious matrix (PBO-FRCM). The investigated parameters were the degree of pre-damage (non-damaged, damaged monotonically up to yielding, or fatigue damaged), the number of PBO-FRCM layers (0, 2, or 4), and the tie spacing (180 or 90 mm). The experimental results of testing 12 short columns under axial compression showed that PBO-FRCM systems enhanced the capacity of the non-damaged columns and successfully restored and further enhanced the capacity of the pre-damaged columns. Columns strengthened with two and four PBO-FRCM layers showed a gain in the capacity of up to 40% and 75%, respectively. Furthermore, PBO-FRCM wrapping enhanced the ductility of both the non-damaged and the pre-damaged columns, in which ductility improvement was more noticeable in columns with the larger tie spacing. Finally, the theoretical load-carrying capacity calculated using ACI 549 provisions showed a good agreement with the experimental capacity of all tested columns.
© 2022 International Federation for Structural Concrete.\n
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\n \n\n \n \n \n \n \n \n Shake Table Tests of Self-Centering Steel Braced Frame with Pretensioned Basalt Fiber Reinforced Polymers.\n \n \n \n \n\n\n \n Wang, Y.; Zhou, Z.; Xie, Y.; Huang, L.; and Zheng, J.\n\n\n \n\n\n\n Journal of Earthquake Engineering, 27(11): 3251 - 3268. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ShakePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224012842675 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shake Table Tests of Self-Centering Steel Braced Frame with Pretensioned Basalt Fiber Reinforced Polymers},\njournal = {Journal of Earthquake Engineering},\nauthor = {Wang, Yongwei and Zhou, Zhen and Xie, Yazhou and Huang, Linjie and Zheng, Jule},\nvolume = {27},\nnumber = {11},\nyear = {2023},\npages = {3251 - 3268},\nissn = {13632469},\nabstract = {<div data-language="eng" data-ev-field="abstract">Shake table tests were conducted on a three-story steel braced frame with pretensioned basalt fiber reinforced polymer (BFRP) under the mainshock and aftershock sequences. The BFRPs were firstly tested to evaluate their dynamic behaviors. Then the self-centering braced frame was excited to a series of scaled earthquakes whose PGAs range from 0.2 g to 1.2 g. Through the pinned connections in the tested frame, the self-centering braces (SCBs) with pretensioned BFRPs were the standalone components to dissipate the seismic energy. The results revealed that the BFRPs with slight performance degradation were suitable to provide the restoring force for SCBs even under the strongest earthquake intensity. SCBs with pretensioned BFRPs were efficient in preventing damage and reducing the residual drift ratios. Although the aftershock slightly amplified the accelerations of the tested frame, the self-centering braced frame with pretensioned BFRPs presented similar drift ratios under the aftershock and separate mainshock with the same PGA. Therefore, the self-centering steel braced frame with pretensioned BFRPs has favorable resilient seismic behaviors and could quickly restore its functions after a strong mainshock-aftershock sequence.<br/></div> © 2022 Taylor & Francis Group, LLC.},\nkey = {Earthquakes},\n%keywords = {Basalt;Reinforced plastics;Steel fibers;Structural frames;},\n%note = {Aftershock;Basalt fiber;Basalt fiber reinforced polymer;Fiber-reinforced polymers;Fibre reinforced polymers;Pretensioned;Seismic Performance;Self centering;Self-centeringbrace;Shake-table tests;},\nURL = {http://dx.doi.org/10.1080/13632469.2022.2127978},\n} \n\n\n
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Shake table tests were conducted on a three-story steel braced frame with pretensioned basalt fiber reinforced polymer (BFRP) under the mainshock and aftershock sequences. The BFRPs were firstly tested to evaluate their dynamic behaviors. Then the self-centering braced frame was excited to a series of scaled earthquakes whose PGAs range from 0.2 g to 1.2 g. Through the pinned connections in the tested frame, the self-centering braces (SCBs) with pretensioned BFRPs were the standalone components to dissipate the seismic energy. The results revealed that the BFRPs with slight performance degradation were suitable to provide the restoring force for SCBs even under the strongest earthquake intensity. SCBs with pretensioned BFRPs were efficient in preventing damage and reducing the residual drift ratios. Although the aftershock slightly amplified the accelerations of the tested frame, the self-centering braced frame with pretensioned BFRPs presented similar drift ratios under the aftershock and separate mainshock with the same PGA. Therefore, the self-centering steel braced frame with pretensioned BFRPs has favorable resilient seismic behaviors and could quickly restore its functions after a strong mainshock-aftershock sequence.
© 2022 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n Development and validation of a numerical strategy for the seismic assessment of a timber retrofitting solution for URM cavity-wall buildings.\n \n \n \n \n\n\n \n Morandini, C.; Malomo, D.; Pinho, R.; and Penna, A.\n\n\n \n\n\n\n Journal of Earthquake Engineering, 27(8): 2224 - 2243. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"DevelopmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223212555375 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Development and validation of a numerical strategy for the seismic assessment of a timber retrofitting solution for URM cavity-wall buildings},\njournal = {Journal of Earthquake Engineering},\nauthor = {Morandini, Chiara and Malomo, Daniele and Pinho, Rui and Penna, Andrea},\nvolume = {27},\nnumber = {8},\nyear = {2023},\npages = {2224 - 2243},\nissn = {13632469},\nabstract = {<div data-language="eng" data-ev-field="abstract">This work presents the results of a numerical investigation on the effect of light timber retrofit systems on the global response of URM cavity-wall buildings. The building object of the study is a two-storey cavity-wall terraced house, retrofitted with OSB panels and timber frames. The Applied Element Method, was chosen for the numerical analyses. Numerical models, calibrated on experimental data of both retrofitted and non-retrofitted walls, were validated through the simulation of a shake-table test of a full-scale retrofitted specimen. A parametric study was then conducted to investigate the influence of different retrofit layouts on the building’s global seismic response.<br/></div> © 2022 Taylor & Francis Group, LLC.},\nkey = {Walls (structural partitions)},\n%keywords = {Numerical methods;Retrofitting;Seismology;Timber;},\n%note = {Applied element method;Cavity wall;Cavity wall systems;Element method;Numerical investigations;Numerical strategies;Retrofitted masonry;Seismic assessment;Shake-table tests;Timber retrofit;},\nURL = {http://dx.doi.org/10.1080/13632469.2022.2104960},\n} \n\n\n
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This work presents the results of a numerical investigation on the effect of light timber retrofit systems on the global response of URM cavity-wall buildings. The building object of the study is a two-storey cavity-wall terraced house, retrofitted with OSB panels and timber frames. The Applied Element Method, was chosen for the numerical analyses. Numerical models, calibrated on experimental data of both retrofitted and non-retrofitted walls, were validated through the simulation of a shake-table test of a full-scale retrofitted specimen. A parametric study was then conducted to investigate the influence of different retrofit layouts on the building’s global seismic response.
© 2022 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n Numerical Modeling of the B Train Double and the Cl-625 Canadian Trucks.\n \n \n \n \n\n\n \n Ben Afia, A.; Annan, C.; Dey, P.; and Petitclerc, S.\n\n\n \n\n\n\n In volume 241, pages 543 - 555, Virtual, Online, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222712309209 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical Modeling of the B Train Double and the Cl-625 Canadian Trucks},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Ben Afia, Achraf and Annan, Charles-Darwin and Dey, Pampa and Petitclerc, Samuel},\nvolume = {241},\nyear = {2023},\npages = {543 - 555},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">Vehicle-bridge interaction is a critical subject in the understanding of the dynamic behaviour of highway bridges under vehicular traffic. Numerical methods often used to evaluate this interaction requires a reliable and efficient numerical model of the specified design truck. Some simplified truck numerical models have been proposed in the literature, but they meet specific design requirements. There is currently no truck model developed to meet the current Canadian bridge design requirements. The present research seeks to develop a simplified truck model that takes into account the loads and dimensions of current Canadian trucks. Since the development of a new truck model is a long and arduous process, the method used in this paper is based on calibrating Canadian truck models based on existing models from the literature. In this study, the calibration process for both the B train double and the CL-625 Canadian design truck are presented. Different parameters and results of both models are explained.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Trucks},\n%keywords = {Automobiles;Bridges;Numerical methods;Numerical models;},\n%note = {'current;B train double;Bridge design;Calibration process;CL-625;Dynamic behaviors;Model-based OPC;Simplified truck model;Truck models;Vehicle-bridge interaction;},\nURL = {http://dx.doi.org/10.1007/978-981-19-0511-7_46},\n} \n\n\n
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Vehicle-bridge interaction is a critical subject in the understanding of the dynamic behaviour of highway bridges under vehicular traffic. Numerical methods often used to evaluate this interaction requires a reliable and efficient numerical model of the specified design truck. Some simplified truck numerical models have been proposed in the literature, but they meet specific design requirements. There is currently no truck model developed to meet the current Canadian bridge design requirements. The present research seeks to develop a simplified truck model that takes into account the loads and dimensions of current Canadian trucks. Since the development of a new truck model is a long and arduous process, the method used in this paper is based on calibrating Canadian truck models based on existing models from the literature. In this study, the calibration process for both the B train double and the CL-625 Canadian design truck are presented. Different parameters and results of both models are explained.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Assessment of Vertical Spectral Acceleration Demands in Eastern Canada Seismic Zone.\n \n \n \n \n\n\n \n Mazloom, S.; and Assi, R.\n\n\n \n\n\n\n In volume 241, pages 201 - 209, Virtual, Online, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"AssessmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222712309385 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment of Vertical Spectral Acceleration Demands in Eastern Canada Seismic Zone},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Mazloom, Shahabaldin and Assi, Rola},\nvolume = {241},\nyear = {2023},\npages = {201 - 209},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper is focused on the evaluation of the vertical seismic spectra corresponding to site classes A and C in the eastern Canada seismic region. To this end, the ratios of vertical to horizontal (V/H) peak spectral accelerations (PSA) were computed for 248 horizontal and vertical sets of historical records resulting from 67 moderate to strong earthquakes (1982–2015) with a range of magnitudes M<inf>w</inf> varying between 3.0 and 6.0 and fault distances less than 150 km. Since most collected data were recorded on site class A, the time history conversion technique proposed in the DEEPSOIL software was used to convert the records on site class A to site class C and vice versa so that an equal number of records is obtained for each of the aforementioned site classes. Then, the mean PSA ratios of the 248 sets of records were computed for each site class. The results indicated that these V/H ratios exceed the 2/3 empirical ratio prescribed in NBC 2015 for both site classes at all period ranges.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {C (programming language)},\n%keywords = {Seismology;},\n%note = {Class A;Eastern Canada;Historical records;Peak ground acceleration;Peak spectral acceleration;Seismic zones;Site class;Spectral acceleration;Vertical to horizontal ratio;},\nURL = {http://dx.doi.org/10.1007/978-981-19-0511-7_18},\n} \n\n\n
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This paper is focused on the evaluation of the vertical seismic spectra corresponding to site classes A and C in the eastern Canada seismic region. To this end, the ratios of vertical to horizontal (V/H) peak spectral accelerations (PSA) were computed for 248 horizontal and vertical sets of historical records resulting from 67 moderate to strong earthquakes (1982–2015) with a range of magnitudes Mw varying between 3.0 and 6.0 and fault distances less than 150 km. Since most collected data were recorded on site class A, the time history conversion technique proposed in the DEEPSOIL software was used to convert the records on site class A to site class C and vice versa so that an equal number of records is obtained for each of the aforementioned site classes. Then, the mean PSA ratios of the 248 sets of records were computed for each site class. The results indicated that these V/H ratios exceed the 2/3 empirical ratio prescribed in NBC 2015 for both site classes at all period ranges.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n New Hybrid Multi-Core Buckling-Restrained Brace Designs for Enhanced Seismic Performance.\n \n \n \n \n\n\n \n Thibault, P.; Annan, C.; and Dey, P.\n\n\n \n\n\n\n In volume 241, pages 353 - 365, Virtual, Online, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"NewPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222712309415 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {New Hybrid Multi-Core Buckling-Restrained Brace Designs for Enhanced Seismic Performance},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Thibault, Pierre and Annan, Charles-Darwin and Dey, Pampa},\nvolume = {241},\nyear = {2023},\npages = {353 - 365},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">The configuration of ductile steel elements in a steel frame is fundamental to the structure’s performance under seismic ground motion. Hybrid solutions are being explored as an alternative to traditional structural systems to improve on their limitations. The hybrid concept is hinged on harnessing benefits from the varying characteristics of different designs or materials carefully combined into one ductile design to achieve a desirable response. Contemporary seismic-resistant design of steel braced frames is based on dissipating earthquake energy through significant inelastic deformation in the brace elements. Buckling-restrained braces (BRBs) are a type of concentrically braced system characterized by braces that yield equally both in tension and in compression, thus exhibiting superior energy dissipation capability. However, BRBs often display a low post-yield stiffness, and consequently large residual drifts after seismic events. One promising solution is to design a hybrid BRB, which includes multi material steel cores. The present research has two main objectives: to investigate the potential of different combinations of core plate materials, then followed by an explicit design of hybrid brace systems that can accommodate the complex deformation pattern of the multiple core plates. Results indicate that the post-yield behavior of hybrid BRBs is improved when a 350WT carbon steel is used in conjunction with another metal having low-yield and high strain-hardening behavior, such as stainless steels, some aluminum alloys, or other grades of carbon steels. Finally, the design process and the details of two hybrid BRB configurations are presented.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Earthquakes},\n%keywords = {Aluminum alloys;Buckling;Deformation;Energy dissipation;Hybrid materials;Plates (structural components);Seismic design;Steel construction;Strain hardening;Structural frames;},\n%note = {Buckling restrained braces;Ductile steel;Hybrid solution;Multi-cores;Performance;Seismic ground motions;Seismic Performance;Steel elements;Steel frame;Structural systems;},\nURL = {http://dx.doi.org/10.1007/978-981-19-0511-7_30},\n} \n\n\n
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The configuration of ductile steel elements in a steel frame is fundamental to the structure’s performance under seismic ground motion. Hybrid solutions are being explored as an alternative to traditional structural systems to improve on their limitations. The hybrid concept is hinged on harnessing benefits from the varying characteristics of different designs or materials carefully combined into one ductile design to achieve a desirable response. Contemporary seismic-resistant design of steel braced frames is based on dissipating earthquake energy through significant inelastic deformation in the brace elements. Buckling-restrained braces (BRBs) are a type of concentrically braced system characterized by braces that yield equally both in tension and in compression, thus exhibiting superior energy dissipation capability. However, BRBs often display a low post-yield stiffness, and consequently large residual drifts after seismic events. One promising solution is to design a hybrid BRB, which includes multi material steel cores. The present research has two main objectives: to investigate the potential of different combinations of core plate materials, then followed by an explicit design of hybrid brace systems that can accommodate the complex deformation pattern of the multiple core plates. Results indicate that the post-yield behavior of hybrid BRBs is improved when a 350WT carbon steel is used in conjunction with another metal having low-yield and high strain-hardening behavior, such as stainless steels, some aluminum alloys, or other grades of carbon steels. Finally, the design process and the details of two hybrid BRB configurations are presented.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Defects and Quality Control of Friction Stir Welded Joints in Aluminum Bridge Decks.\n \n \n \n \n\n\n \n Trimech, M.; Annan, C.; Walbridge, S.; Amira, S.; and Nadeau, F.\n\n\n \n\n\n\n In volume 248, pages 525 - 536, Virtual, Online, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"DefectsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222512243615 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Defects and Quality Control of Friction Stir Welded Joints in Aluminum Bridge Decks},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Trimech, M. and Annan, C.-D. and Walbridge, S. and Amira, S. and Nadeau, F.},\nvolume = {248},\nyear = {2023},\npages = {525 - 536},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">Aluminum vehicular bridge decks figuhave been increasingly used for the replacement of deficient bridge slabs made from reinforced concrete or steel. The design of these decks has been under increasing development since the late 90s and different types of vehicular bridge deck profiles have been industrialized. Aluminum vehicular bridge decks are mainly manufactured through joining several extrusions together by means of welding. Initially, traditional fusion welding techniques were used in the fabrication process. However, more recently, a relatively new technology, friction stir welding (FSW), was used in certain bridge projects. FSW is proving to enhance the welding quality and the overall mechanical performance of the joint compared to traditional welding techniques. However, unlike fusion welding techniques, FSW standards and specifications still lack important quality control criteria and tolerance levels for common FSW defects. In this context, this paper aims at defining tolerance levels for common FSW fit-up defects in aluminium bridge deck application. First, FSW trials of typical vehicular bridge deck extrusions were conducted to determine the welding parameters yielding a sound welding quality. Then, fit-up defects such as gap and tool offset were investigated experimentally, and tolerance levels were determined following a concise stage prequalification process. It was found that a gap of 1.5 mm and a tool offset in the retreating side (RS) of 1.5 mm were acceptable limits. It was also shown metallographically that the level of the tool offset in the advancing side (AS) of 5 mm presented a sound weld quality with a continuous remnant oxide layer within the weld nugget.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Friction},\n%keywords = {Aluminum;Aluminum bridges;Bridge decks;Defects;Extrusion;Fits and tolerances;Friction stir welding;Quality control;Reinforced concrete;Welds;},\n%note = {Bridge projects;Bridge slabs;Deficient bridges;Fabrication process;Friction stir welded joints;Friction-stir-welding;Fusion welding;Tolerance levels;Tool offset;Welding quality;},\nURL = {http://dx.doi.org/10.1007/978-981-19-1004-3_43},\n} \n\n\n
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Aluminum vehicular bridge decks figuhave been increasingly used for the replacement of deficient bridge slabs made from reinforced concrete or steel. The design of these decks has been under increasing development since the late 90s and different types of vehicular bridge deck profiles have been industrialized. Aluminum vehicular bridge decks are mainly manufactured through joining several extrusions together by means of welding. Initially, traditional fusion welding techniques were used in the fabrication process. However, more recently, a relatively new technology, friction stir welding (FSW), was used in certain bridge projects. FSW is proving to enhance the welding quality and the overall mechanical performance of the joint compared to traditional welding techniques. However, unlike fusion welding techniques, FSW standards and specifications still lack important quality control criteria and tolerance levels for common FSW defects. In this context, this paper aims at defining tolerance levels for common FSW fit-up defects in aluminium bridge deck application. First, FSW trials of typical vehicular bridge deck extrusions were conducted to determine the welding parameters yielding a sound welding quality. Then, fit-up defects such as gap and tool offset were investigated experimentally, and tolerance levels were determined following a concise stage prequalification process. It was found that a gap of 1.5 mm and a tool offset in the retreating side (RS) of 1.5 mm were acceptable limits. It was also shown metallographically that the level of the tool offset in the advancing side (AS) of 5 mm presented a sound weld quality with a continuous remnant oxide layer within the weld nugget.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n An Integrated Multi-criteria Decision Making Model for Evaluating Sustainability Rating Systems.\n \n \n \n \n\n\n \n Al-Sakkaf, A.; Mohammed Abdelkader, E.; Elshaboury, N.; El-Zahab, S.; Bagchi, A.; and Zayed, T.\n\n\n \n\n\n\n In volume 239, pages 405 - 418, Virtual, Online, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222512239866 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An Integrated Multi-criteria Decision Making Model for Evaluating Sustainability Rating Systems},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Al-Sakkaf, A. and Mohammed Abdelkader, E. and Elshaboury, N. and El-Zahab, S. and Bagchi, A. and Zayed, T.},\nvolume = {239},\nyear = {2023},\npages = {405 - 418},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">Heritage buildings require special attention because of their unique architectural style. Due to the lack of rating systems designed for heritage buildings, this paper presents an assessment tool that considers specific characteristics of heritage buildings. The utilized rating systems worldwide are identified, studied and compared to test their advantages and limitations. As such, a group of attributes is identified to evaluate the current sustainability ratings including site and ecology, material waste reduction, indoor environmental quality, etc. Analytical Hierarchy Process is utilized for interpreting the weights of the attributes. The comparative analysis is carried out using an integrated paradigm that comprises four multi-criteria decision making techniques namely, grey relational analysis, complex proportional assessment, technique for order of preference by similarity to ideal solution and multi-objective optimization on the basis of ratio analysis. Average ranking algorithm is then adopted for the sake of establishing a holistic evaluation of the sustainability rating tools. Results demonstrated that German Sustainable Building Council accomplished the highest ranking while green globe and greenship Indonesia provided the lowest ranking. It was also inferred that these systems failed to deal with heritage buildings. Therefore, it is recommended to develop a system designed specifically for heritage buildings by adjusting related rating systems. It is expected also that the developed model will enable the user to map the main deficiencies in the current sustainability rating systems, which paves way for more comprehensive and efficient rating sustainability heritage rating systems.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Sustainable development},\n%keywords = {Decision making;Intelligent buildings;Multiobjective optimization;Quality control;Systems analysis;},\n%note = {'current;Analytical Hierarchy Process;Architectural style;Assessment tool;Heritage buildings;Indoor environmental quality;Material wastes;Multi-criteria decision-making models;Rating system;Waste reduction;},\nURL = {http://dx.doi.org/10.1007/978-981-19-0503-2_33},\n} \n\n\n
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Heritage buildings require special attention because of their unique architectural style. Due to the lack of rating systems designed for heritage buildings, this paper presents an assessment tool that considers specific characteristics of heritage buildings. The utilized rating systems worldwide are identified, studied and compared to test their advantages and limitations. As such, a group of attributes is identified to evaluate the current sustainability ratings including site and ecology, material waste reduction, indoor environmental quality, etc. Analytical Hierarchy Process is utilized for interpreting the weights of the attributes. The comparative analysis is carried out using an integrated paradigm that comprises four multi-criteria decision making techniques namely, grey relational analysis, complex proportional assessment, technique for order of preference by similarity to ideal solution and multi-objective optimization on the basis of ratio analysis. Average ranking algorithm is then adopted for the sake of establishing a holistic evaluation of the sustainability rating tools. Results demonstrated that German Sustainable Building Council accomplished the highest ranking while green globe and greenship Indonesia provided the lowest ranking. It was also inferred that these systems failed to deal with heritage buildings. Therefore, it is recommended to develop a system designed specifically for heritage buildings by adjusting related rating systems. It is expected also that the developed model will enable the user to map the main deficiencies in the current sustainability rating systems, which paves way for more comprehensive and efficient rating sustainability heritage rating systems.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Shell Analysis of Steel Frames Considering Low-Cycle Fatigue Within the Continuum-Damage-Plasticity Framework.\n \n \n \n \n\n\n \n Delir, S.; Erkmen, E.; and Tirca, L.\n\n\n \n\n\n\n In volume 240, pages 351 - 362, Virtual, Online, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"ShellPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222312188936 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shell Analysis of Steel Frames Considering Low-Cycle Fatigue Within the Continuum-Damage-Plasticity Framework},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Delir, S. and Erkmen, E. and Tirca, L.},\nvolume = {240},\nyear = {2023},\npages = {351 - 362},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">In the event of an earthquake, steel-frames are subjected to cyclic loads, which can cause strain accumulation in ductile members that lead to micro-scale fracture due to low-cycle fatigue. As a result, early yielding and stiffness degradation can be observed at macro-scale stress–strain relations. Steel moment resisting frame members are made of thin-walled cross-sections, for which local or lateral-torsional buckling failure modes may occur. In order to capture inelastic material behaviour and local, as well as, lateral-torsional buckling modes, shell-type modelling approaches could be adopted. When shell elements are used, multi-axial material models are required. Continuum Damage Plasticity (CDP) framework can be used to build inelastic constitutive models. The CDP has the capability of representing both the permanent deformations due to the plastic component and the degradation of elastic moduli due to the damage component. In this paper, a shell-element based modelling approach was presented for the geometrical and material nonlinearity. Moreover, the low-cycle fatigue effects were considered within the CDP framework. After validation of the proposed approach using case studies from the literature, the possibilities of modelling different failure modes were investigated. It is shown that considerations of local- and lateral-buckling modes, as well as, the low-cycle fatigue effect may cause significant differences in predicting the behaviour of steel frames under cyclic loads.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Steel construction},\n%keywords = {Buckling;Continuum damage mechanics;Cyclic loads;Fatigue damage;Low-cycle fatigue;Plasticity;Shells (structures);Structural frames;Thin walled structures;},\n%note = {Buckling mode;Continuum damage-plasticity;Fatigue effects;Lateral-torsional buckling;Low cycle fatigues;Modeling approach;Shell analysis;Shell element;Steel frame;Strain accumulations;},\nURL = {http://dx.doi.org/10.1007/978-981-19-0507-0_33},\n} \n\n\n
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In the event of an earthquake, steel-frames are subjected to cyclic loads, which can cause strain accumulation in ductile members that lead to micro-scale fracture due to low-cycle fatigue. As a result, early yielding and stiffness degradation can be observed at macro-scale stress–strain relations. Steel moment resisting frame members are made of thin-walled cross-sections, for which local or lateral-torsional buckling failure modes may occur. In order to capture inelastic material behaviour and local, as well as, lateral-torsional buckling modes, shell-type modelling approaches could be adopted. When shell elements are used, multi-axial material models are required. Continuum Damage Plasticity (CDP) framework can be used to build inelastic constitutive models. The CDP has the capability of representing both the permanent deformations due to the plastic component and the degradation of elastic moduli due to the damage component. In this paper, a shell-element based modelling approach was presented for the geometrical and material nonlinearity. Moreover, the low-cycle fatigue effects were considered within the CDP framework. After validation of the proposed approach using case studies from the literature, the possibilities of modelling different failure modes were investigated. It is shown that considerations of local- and lateral-buckling modes, as well as, the low-cycle fatigue effect may cause significant differences in predicting the behaviour of steel frames under cyclic loads.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Simplified Approach for Fragility Analysis of Highway Bridges.\n \n \n \n \n\n\n \n Diot, A.; Farzam, A.; Nollet, M.; and Ezz, A. A. E.\n\n\n \n\n\n\n In volume 240, pages 203 - 214, Virtual, Online, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"SimplifiedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222312188915 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Simplified Approach for Fragility Analysis of Highway Bridges},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Diot, A. and Farzam, A. and Nollet, M.-J. and Ezz, A. Abo El},\nvolume = {240},\nyear = {2023},\npages = {203 - 214},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">In the Province of Québec seismic hazard is considered as moderate except for Charlevoix high seismicity region. However, the high population density in urban areas has the potential to increase the level of seismic risk. In this context, the evaluation of seismic impacts on urban bridges is crucial to mitigation, emergency and recovery planning for transportation network. The degree of bridge damage determines the cost and time required for repairs and the level of post-earthquake functionality of the bridge is determined by its capacity to carry traffic flow. For urban bridges network, potential damage is estimated by fragility analysis of typical prototype models representing bridge classes. The aim of this study is to propose a simplified fragility model to estimate potential seismic damage to bridges in Québec area. A simplified approach that has been implemented in Hazus earthquake loss estimation software is adapted to the seismic hazard and bridges properties in the province of Québec. Geometrical and material properties for typical bridges are applied to estimate bridges capacity. Median and standard deviation of respective capacity values are combined with demand spectra compatible to the regional seismicity in view of generating fragility curves for four damage states. Results are compared with literature fragility functions based on dynamic analysis of typical bridges in Québec.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Seismic response},\n%keywords = {Earthquakes;Hazards;Population statistics;Seismic design;Urban planning;Urban transportation;},\n%note = {Emergency planning;Fragility analysis;High population density;Mitigation planning;Recovery planning;Seismic hazards;Seismic impacts;Seismic risk;Urban areas;Urban BRIDGES;},\nURL = {http://dx.doi.org/10.1007/978-981-19-0507-0_19},\n} \n\n\n
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In the Province of Québec seismic hazard is considered as moderate except for Charlevoix high seismicity region. However, the high population density in urban areas has the potential to increase the level of seismic risk. In this context, the evaluation of seismic impacts on urban bridges is crucial to mitigation, emergency and recovery planning for transportation network. The degree of bridge damage determines the cost and time required for repairs and the level of post-earthquake functionality of the bridge is determined by its capacity to carry traffic flow. For urban bridges network, potential damage is estimated by fragility analysis of typical prototype models representing bridge classes. The aim of this study is to propose a simplified fragility model to estimate potential seismic damage to bridges in Québec area. A simplified approach that has been implemented in Hazus earthquake loss estimation software is adapted to the seismic hazard and bridges properties in the province of Québec. Geometrical and material properties for typical bridges are applied to estimate bridges capacity. Median and standard deviation of respective capacity values are combined with demand spectra compatible to the regional seismicity in view of generating fragility curves for four damage states. Results are compared with literature fragility functions based on dynamic analysis of typical bridges in Québec.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Lateral force-displacement response of buried pipes in slopes.\n \n \n \n \n\n\n \n Katebi, M.; Wijewickreme, D.; Maghoul, P.; and Roy, K.\n\n\n \n\n\n\n Geotechnique, 73(5): 375 - 387. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"LateralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214811231860 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Lateral force-displacement response of buried pipes in slopes},\njournal = {Geotechnique},\nauthor = {Katebi, Mohammad and Wijewickreme, Dharma and Maghoul, Pooneh and Roy, Kshama},\nvolume = {73},\nnumber = {5},\nyear = {2023},\npages = {375 - 387},\nissn = {00168505},\nabstract = {<div data-language="eng" data-ev-field="abstract">A series of full-scale experiments was conducted to estimate lateral soil constraints on pipes buried in dense sandy slopes at different burial depths. The experimental data indicated that the soil force on the pipe increases with increase in the slope grade and burial depth ratio. The lateral soil force against relative pipe displacement response observed from the experiments is presented and compared to those arising from level ground conditions. The study was extended to larger burial depth ratios by simulating pipes under sloping ground conditions using a numerical (finite-element) model that was initially calibrated using the results from physical modelling. The findings from the study in terms of the variation of peak lateral soil restraint as a function of the slope grade and burial depth ratio are presented for consideration in pipeline design.<br/></div> © 2021 Thomas Telford Ltd.},\nkey = {Pipelines},\n%keywords = {Finite element method;Soils;},\n%note = {Burial depth ratios;Buried structure;Element models;Finite-element modeling;Full scale tests;Ground conditions;Pipe & pipeline;Slope;Soil forces;Soil-structure interaction;},\nURL = {http://dx.doi.org/10.1680/jgeot.21.00057},\n} \n\n\n\n
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A series of full-scale experiments was conducted to estimate lateral soil constraints on pipes buried in dense sandy slopes at different burial depths. The experimental data indicated that the soil force on the pipe increases with increase in the slope grade and burial depth ratio. The lateral soil force against relative pipe displacement response observed from the experiments is presented and compared to those arising from level ground conditions. The study was extended to larger burial depth ratios by simulating pipes under sloping ground conditions using a numerical (finite-element) model that was initially calibrated using the results from physical modelling. The findings from the study in terms of the variation of peak lateral soil restraint as a function of the slope grade and burial depth ratio are presented for consideration in pipeline design.
© 2021 Thomas Telford Ltd.\n
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\n \n\n \n \n \n \n \n \n Defect Based Condition Assessment of Steel Bridges.\n \n \n \n \n\n\n \n Elbeheri, A.; Bagchi, A.; and Zayed, T.\n\n\n \n\n\n\n In volume 240, pages 623 - 632, Virtual, Online, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"DefectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222312188896 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Defect Based Condition Assessment of Steel Bridges},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Elbeheri, A. and Bagchi, A. and Zayed, T.},\nvolume = {240},\nyear = {2023},\npages = {623 - 632},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">Steel bridges deterioration has been one of the problems in North America for the last years. Steel bridges deterioration mainly attributed to the difficult weather and environmental conditions. Steel bridges suffer mainly from fatigue cracks and Corrosion, which necessitate Frequent inspection. Visual inspection is the most common technique for steel bridges inspection but it depends on the inspector experience and conditions associated with uncertainty and subjectivity inherent in human judgments. So many NDE models have been developed use Non-destructive technologies to be more accurate, reliable and non-human dependent. Non-destructive techniques such as The Eddy Current Method, The Radiographic Method (RT), Ultra-Sonic Method (UT), Infra-red thermography and Laser technology have been used. After Reviewing the latest steel bridge NDT, it was found that the best solution is to combine two or more technology to have the most reliable Bridge evaluation. In researcher’s other publication a proposed NDE combine two method, image processing, and IR thermography. As a result of using more than one measure for inspection it was a must to develop a model which combine defects different measures and come with a unified condition rating. This paper presents systematic procedure to develop a detailed steel bridge condition assessment model by comprehensive aggregation of possible defects. Using fuzzy membership-based defect rating the proposed model will be able to translate uncertain measurements of defects into a reliable bridge condition rating.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Inspection},\n%keywords = {Bridge decks;Defects;Deterioration;Eddy current testing;Steel bridges;Steel corrosion;Thermography (imaging);},\n%note = {Bridge deterioration;Condition;Condition assessments;Environmental conditions;Fatigue corrosion;Fatigue cracks;Human judgments;Steel bridge inspections;Uncertainty;Visual inspection;},\nURL = {http://dx.doi.org/10.1007/978-981-19-0507-0_54},\n} \n\n\n
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Steel bridges deterioration has been one of the problems in North America for the last years. Steel bridges deterioration mainly attributed to the difficult weather and environmental conditions. Steel bridges suffer mainly from fatigue cracks and Corrosion, which necessitate Frequent inspection. Visual inspection is the most common technique for steel bridges inspection but it depends on the inspector experience and conditions associated with uncertainty and subjectivity inherent in human judgments. So many NDE models have been developed use Non-destructive technologies to be more accurate, reliable and non-human dependent. Non-destructive techniques such as The Eddy Current Method, The Radiographic Method (RT), Ultra-Sonic Method (UT), Infra-red thermography and Laser technology have been used. After Reviewing the latest steel bridge NDT, it was found that the best solution is to combine two or more technology to have the most reliable Bridge evaluation. In researcher’s other publication a proposed NDE combine two method, image processing, and IR thermography. As a result of using more than one measure for inspection it was a must to develop a model which combine defects different measures and come with a unified condition rating. This paper presents systematic procedure to develop a detailed steel bridge condition assessment model by comprehensive aggregation of possible defects. Using fuzzy membership-based defect rating the proposed model will be able to translate uncertain measurements of defects into a reliable bridge condition rating.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Analysis of Reinforced Concrete Shear Walls Using Elastic–Plastic-Damage Modelling.\n \n \n \n \n\n\n \n Erkmen, R.; Sarikaya, A.; Arat, O.; and Galal, K.\n\n\n \n\n\n\n In volume 240, pages 553 - 567, Virtual, Online, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"AnalysisPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222312188928 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Analysis of Reinforced Concrete Shear Walls Using Elastic–Plastic-Damage Modelling},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Erkmen, R.E. and Sarikaya, A. and Arat, O. and Galal, K.},\nvolume = {240},\nyear = {2023},\npages = {553 - 567},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">Shear walls are useful structural tools in redistributing the stresses and controlling the damage in reinforced concrete buildings under earthquake loads. Due to their comparatively large cross-sections, they carry significant portion of the base bending moment and shear under lateral load. Analysis of shear walls requires incorporation of inelastic material models as often the stresses the elastic threshold under extreme lateral loading such as earthquake. On the other hand, analysis and design tools used for buildings often employ beam-type 1D finite element formulations for shear walls as well as beams and columns as such models are computationally faster which is especially important in nonlinear time-history analysis and the results are easier to interpret for design purposes. In 1D finite element formulations often uniaxial material models are used. In this study we have employed a multi-axial concrete model within a 1D finite element formulation so that effect of shear stresses can be considered in the material behaviour. The accuracy of the proposed numerical approach is illustrated by comparing its predictions with experimental results from literature.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Shear walls},\n%keywords = {Concrete buildings;Earthquakes;Finite element method;Reinforced concrete;Shear flow;Shear stress;Structural design;},\n%note = {Earthquake load;Elastic-Plastic;Elasto-plastic damage model;Finite element formulations;Material modeling;Plastic-damage models;Reinforced concrete buildings;Reinforced concrete shear walls;Reinforcement configuration;Structural Tools;},\nURL = {http://dx.doi.org/10.1007/978-981-19-0507-0_49},\n} \n\n\n
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Shear walls are useful structural tools in redistributing the stresses and controlling the damage in reinforced concrete buildings under earthquake loads. Due to their comparatively large cross-sections, they carry significant portion of the base bending moment and shear under lateral load. Analysis of shear walls requires incorporation of inelastic material models as often the stresses the elastic threshold under extreme lateral loading such as earthquake. On the other hand, analysis and design tools used for buildings often employ beam-type 1D finite element formulations for shear walls as well as beams and columns as such models are computationally faster which is especially important in nonlinear time-history analysis and the results are easier to interpret for design purposes. In 1D finite element formulations often uniaxial material models are used. In this study we have employed a multi-axial concrete model within a 1D finite element formulation so that effect of shear stresses can be considered in the material behaviour. The accuracy of the proposed numerical approach is illustrated by comparing its predictions with experimental results from literature.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Consequences on Residential Buildings in Greater Montreal for a Repeat of the 1732 M5.8 Montreal Earthquake.\n \n \n \n \n\n\n \n Rosset, P.; Chouinard, L.; and Nollet, M.\n\n\n \n\n\n\n In volume 240, pages 667 - 679, Virtual, Online, 2023. \n \n\n\n\n
\n\n\n\n \n \n \"ConsequencesPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222312188894 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Consequences on Residential Buildings in Greater Montreal for a Repeat of the 1732 M5.8 Montreal Earthquake},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Rosset, P. and Chouinard, L. and Nollet, M.-J.},\nvolume = {240},\nyear = {2023},\npages = {667 - 679},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">A seismic scenario based on the repeat of the 1732 M5.8 Montreal earthquake was performed to estimate its actual impacts on residential buildings and the population of the Montreal Metropolitan Community (MMC). At the time of the event, the population of Montreal was 3000, and 300 out of 400 buildings, which were mostly wood structures with walls made of timber planks, suffered some damage to chimneys and cracked walls. Nowadays, the MMC comprises a population of over 4 million and around 870′000 buildings were compiled using the latest evaluation roles. The majority (>90%) of the residential houses are wood light frame structures, and single-family houses represent 74% of the building stock. The total value of the building exposure is estimated around 285 billion of Can$, with the content accounting for 55% of the total. For this scenario, ground motions are calculated by combining several GMPEs validated for central and eastern North America and a soil microzonation derived from seismic measures and borehole data. About 12% of the building stock would suffer extensive and complete damage, this value decreasing to 1.2% for the municipalities outside Montreal. The total monetary losses would amount to 12% of the value of the portfolio in Montreal and around 0.04% outside Montreal, non-structural damage accounting for 80% of the damage on average. Debris generated from the damage is estimated at 7 million tons, wood and brick materials representing more than 65% of the total.<br/></div> © 2023, Canadian Society for Civil Engineering.},\nkey = {Wooden buildings},\n%keywords = {Earthquakes;Housing;Structural analysis;Walls (structural partitions);},\n%note = {Building stocks;Frame structure;Light frames;Residential building;Residential house;Scenario-based;Seismic scenarios;Single-family house;Total values;Wood structure;},\nURL = {http://dx.doi.org/10.1007/978-981-19-0507-0_58},\n} \n\n\n
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A seismic scenario based on the repeat of the 1732 M5.8 Montreal earthquake was performed to estimate its actual impacts on residential buildings and the population of the Montreal Metropolitan Community (MMC). At the time of the event, the population of Montreal was 3000, and 300 out of 400 buildings, which were mostly wood structures with walls made of timber planks, suffered some damage to chimneys and cracked walls. Nowadays, the MMC comprises a population of over 4 million and around 870′000 buildings were compiled using the latest evaluation roles. The majority (>90%) of the residential houses are wood light frame structures, and single-family houses represent 74% of the building stock. The total value of the building exposure is estimated around 285 billion of Can$, with the content accounting for 55% of the total. For this scenario, ground motions are calculated by combining several GMPEs validated for central and eastern North America and a soil microzonation derived from seismic measures and borehole data. About 12% of the building stock would suffer extensive and complete damage, this value decreasing to 1.2% for the municipalities outside Montreal. The total monetary losses would amount to 12% of the value of the portfolio in Montreal and around 0.04% outside Montreal, non-structural damage accounting for 80% of the damage on average. Debris generated from the damage is estimated at 7 million tons, wood and brick materials representing more than 65% of the total.
© 2023, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Effect of gradation, compaction and water content on crushed waste rocks strength.\n \n \n \n \n\n\n \n Laverdiere, A.; Hao, S.; Pabst, T.; and Courcelles, B.\n\n\n \n\n\n\n Road Materials and Pavement Design, 24(3): 761 - 775. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"EffectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221111776094 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of gradation, compaction and water content on crushed waste rocks strength},\njournal = {Road Materials and Pavement Design},\nauthor = {Laverdiere, Antoine and Hao, Shengpeng and Pabst, Thomas and Courcelles, Benoit},\nvolume = {24},\nnumber = {3},\nyear = {2023},\npages = {761 - 775},\nissn = {14680629},\nabstract = {<div data-language="eng" data-ev-field="abstract">We reduced the size of the abstract to 170 words, but we cannot go lower without loosing meaning. We hope it will be ok like this --> Open-pit mining operations generate large volumes of waste rocks. It can be both economically and environmentally attractive to valorise waste rocks in mining infrastructures such as haul roads. However current practice usually consists of using waste rock directly, without any preparation or selection, thus frequently resulting in punctures, dust generation and low durability. The aim of this study was therefore to determine optimal geotechnical properties of crushed waste rocks for use in surface course layer. Crushed waste rocks were characterised in the laboratory. Their strength was evaluated using California Bearing Ratio (CBR) tests. Several compaction energies were used, and he effect of maximum particle size, fines content, and dry density on the strength were assessed. Results showed that these parameters had a significant impact on the performance of the material. The strength was maximum for an optimum FC of around 10%, a high density and in the presence of coarser particles. Two regression models were also proposed to predict the CBR value of crushed waste rocks based on their physical properties.<br/></div> © 2022 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Regression analysis},\n%keywords = {Bearings (machine parts);Compaction;Curricula;Open pit mining;Particle size;Rocks;},\n%note = {California bearing ratio;Haul roads;Mine haul road;Mine waste rocks;Open-pit mining;Rock strength;Surface course layer;Valorisation;Waste rocks;},\nURL = {http://dx.doi.org/10.1080/14680629.2022.2044373},\n} \n\n\n
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We reduced the size of the abstract to 170 words, but we cannot go lower without loosing meaning. We hope it will be ok like this –> Open-pit mining operations generate large volumes of waste rocks. It can be both economically and environmentally attractive to valorise waste rocks in mining infrastructures such as haul roads. However current practice usually consists of using waste rock directly, without any preparation or selection, thus frequently resulting in punctures, dust generation and low durability. The aim of this study was therefore to determine optimal geotechnical properties of crushed waste rocks for use in surface course layer. Crushed waste rocks were characterised in the laboratory. Their strength was evaluated using California Bearing Ratio (CBR) tests. Several compaction energies were used, and he effect of maximum particle size, fines content, and dry density on the strength were assessed. Results showed that these parameters had a significant impact on the performance of the material. The strength was maximum for an optimum FC of around 10%, a high density and in the presence of coarser particles. Two regression models were also proposed to predict the CBR value of crushed waste rocks based on their physical properties.
© 2022 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n Water safety management during the initial phase of the Covid-19 pandemic: challenges, responses and guidance.\n \n \n \n \n\n\n \n Bichai, F.; Smeets, P.; Barrette, S.; Deere, D.; Ashbolt, N.; and Ferrero, G.\n\n\n \n\n\n\n International Journal of Water Resources Development, 39(2): 337 - 359. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"WaterPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220511543867 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Water safety management during the initial phase of the Covid-19 pandemic: challenges, responses and guidance},\njournal = {International Journal of Water Resources Development},\nauthor = {Bichai, F. and Smeets, P. and Barrette, S. and Deere, D. and Ashbolt, N.J. and Ferrero, G.},\nvolume = {39},\nnumber = {2},\nyear = {2023},\npages = {337 - 359},\nissn = {07900627},\nabstract = {<div data-language="eng" data-ev-field="abstract">Water safety plans address both routine operations and incident responses to support risk management in drinking water utilities. Their use and relevance in facing the challenges of the Covid-19 crisis were investigated via a survey distributed to water utilities and health or environmental agencies across the globe. Responses from 86 respondents from 38 countries were analysed to identify the water safety challenges faced and responses. Water safety plans appear to provide some preparedness and organizational advantages to utilities in facing the Covid-19 crisis, including stronger communication links between utilities and governing agencies. Guidance for future water safety planning is provided.<br/></div> © 2022 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Risk management},\n%keywords = {Facings;Potable water;Safety engineering;Water supply;},\n%note = {Challenge response;Covid-19;Drinking water supplies;Emergency response;Initial phasis;Risks management;Safety management;Water safety;Water safety plans;Water utility;},\nURL = {http://dx.doi.org/10.1080/07900627.2021.2016378},\n} \n\n\n
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Water safety plans address both routine operations and incident responses to support risk management in drinking water utilities. Their use and relevance in facing the challenges of the Covid-19 crisis were investigated via a survey distributed to water utilities and health or environmental agencies across the globe. Responses from 86 respondents from 38 countries were analysed to identify the water safety challenges faced and responses. Water safety plans appear to provide some preparedness and organizational advantages to utilities in facing the Covid-19 crisis, including stronger communication links between utilities and governing agencies. Guidance for future water safety planning is provided.
© 2022 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n Replaceable Rotational Viscoelastic Dampers for Improving Structural Damping and Resilience of Steel Frames.\n \n \n \n \n\n\n \n Shu, Z.; Gan, Z.; Fang, C.; MacRae, G.; Dong, H.; and Xie, Y.\n\n\n \n\n\n\n Journal of Earthquake Engineering, 27(4): 787 - 809. 2023.\n \n\n\n\n
\n\n\n\n \n \n \"ReplaceablePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20215211396171 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Replaceable Rotational Viscoelastic Dampers for Improving Structural Damping and Resilience of Steel Frames},\njournal = {Journal of Earthquake Engineering},\nauthor = {Shu, Zhan and Gan, Zhaozhuo and Fang, Cheng and MacRae, Gregory and Dong, Hanlin and Xie, Yazhou},\nvolume = {27},\nnumber = {4},\nyear = {2023},\npages = {787 - 809},\nissn = {13632469},\nabstract = {<div data-language="eng" data-ev-field="abstract">A replaceable rotational viscoelastic damper (RRVD) which has the potential for replacing the existing steel beam-column connections is proposed for steel frame buildings subject to dynamic vibrations. The RRVD is used with a sacrificial fuse segment to protect the structure at large inter-story drifts. A low-damage solution for the floor diaphragm with the RRVDs is also proposed. The test result confirms that the failure of the new connection is governed by fuse damage. Moreover, the RRVDs improve the system damping and reduces the earthquake-induced roof acceleration and the peak inter-story drift by up to 30%.<br/></div> © 2021 Taylor & Francis Group, LLC.},\nkey = {Earthquakes},\n%keywords = {Damping;Steel construction;Structural frames;Viscoelasticity;},\n%note = {Beam - column connection;Earthquake resilient structure;Interstory drifts;Replaceable link;Steel beam columns;Steel frame;Structural damping;Structural fuse;Visco-elastic dampers;Viscoelastic dampers;},\nURL = {http://dx.doi.org/10.1080/13632469.2021.2009058},\n} \n\n\n
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A replaceable rotational viscoelastic damper (RRVD) which has the potential for replacing the existing steel beam-column connections is proposed for steel frame buildings subject to dynamic vibrations. The RRVD is used with a sacrificial fuse segment to protect the structure at large inter-story drifts. A low-damage solution for the floor diaphragm with the RRVDs is also proposed. The test result confirms that the failure of the new connection is governed by fuse damage. Moreover, the RRVDs improve the system damping and reduces the earthquake-induced roof acceleration and the peak inter-story drift by up to 30%.
© 2021 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n Behaviour of Flexural-Dominated Partially Grouted Reinforced Masonry Shear Walls.\n \n \n \n\n\n \n Al-Ahdal, A.; Aly, N.; and Galal, K.\n\n\n \n\n\n\n In volume 2022-August, pages 43 - 46, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119309 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Behaviour of Flexural-Dominated Partially Grouted Reinforced Masonry Shear Walls},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Al-Ahdal, Abdulelah and Aly, Nader and Galal, Khaled},\nvolume = {2022-August},\nyear = {2022},\npages = {43 - 46},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper discusses the behaviour of flexural-dominated Partially Grouted (PG) Reinforced Masonry Shear Walls (RMSWs). As Masonry structures behave heterogeneously since they consist of different materials (i.e., blocks, mortar, grout, and reinforcement) having different mechanical properties, it is challenging to predict their behaviour, especially in the post-peak zone precisely. Furthermore, analytical models that predict the load-displacement response of PG masonry shear walls are scarce. Therefore, developing simplified analytical models that can predict the behaviour of this type of masonry wall is essential. This paper employed a comprehensive matrix of numerical models to derive a simplified analytical model for flexural-dominated PG masonry walls. The parameters covered by the numerical model included aspect ratio, spacing between vertical and horizontal grouted cells, axial load, the ratio of vertical and horizontal reinforcement, and compressive strength of grouted and ungrouted masonry units. The analytical model is defined by five points: cracking, yielding, ultimate, 20% strength degradation, and 40% strength degradation. The fifth point accounts for the post-peak negative stiffness in the force-displacement relationship of PG masonry walls after the post-peak. The results show that the proposed analytical model provides a good prediction of the lateral load-displacement backbone of flexural-dominated PG masonry shear walls.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Aspect ratio},\n%keywords = {Brick construction;Compressive strength;Retaining walls;Shear walls;Stiffness matrix;},\n%note = {Analytical modeling;Flexural-dominated;Masonry shear walls;Masonry structures;Masonry walls;Mechanical;Partially grouted masonry wall;Post-peak;Reinforced masonry;Strength degradation;},\n} \n\n\n
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This paper discusses the behaviour of flexural-dominated Partially Grouted (PG) Reinforced Masonry Shear Walls (RMSWs). As Masonry structures behave heterogeneously since they consist of different materials (i.e., blocks, mortar, grout, and reinforcement) having different mechanical properties, it is challenging to predict their behaviour, especially in the post-peak zone precisely. Furthermore, analytical models that predict the load-displacement response of PG masonry shear walls are scarce. Therefore, developing simplified analytical models that can predict the behaviour of this type of masonry wall is essential. This paper employed a comprehensive matrix of numerical models to derive a simplified analytical model for flexural-dominated PG masonry walls. The parameters covered by the numerical model included aspect ratio, spacing between vertical and horizontal grouted cells, axial load, the ratio of vertical and horizontal reinforcement, and compressive strength of grouted and ungrouted masonry units. The analytical model is defined by five points: cracking, yielding, ultimate, 20% strength degradation, and 40% strength degradation. The fifth point accounts for the post-peak negative stiffness in the force-displacement relationship of PG masonry walls after the post-peak. The results show that the proposed analytical model provides a good prediction of the lateral load-displacement backbone of flexural-dominated PG masonry shear walls.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Defect Detection in Heritage Buildings using Ground Penetrating Radar 一 A Review.\n \n \n \n\n\n \n Al-Sakkaf, A.; Ghodke, S.; An, C.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 389 - 392, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917118957 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Defect Detection in Heritage Buildings using Ground Penetrating Radar 一 A Review},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Al-Sakkaf, Abobakr and Ghodke, Sharad and An, Chunjiang and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {389 - 392},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Heritage sites and buildings are very important for the society and the need for their conservation is becoming increasingly urgent. The unique nature and the significant value of the heritage buildings have created the need for standard unified methods to be used in local heritage building rehabilitation projects. This will allow such important buildings to fit in their own geographical region or policy. Detecting internal defects in the heritage building elements is very important to determine the appropriate rehabilitation methods. However, a non-invasive method needs to be employed in such cases. Ground Penetrating Radar (GPR) technology is found to be an effective method in determining internal features in concrete structures and is expected to be very useful for stone masonry structures usually found in heritage buildings. The main goal of this paper is to identify the main methodologies that applied GPR in heritage buildings. A state-of-the-art review has been conducted to assess the use of GPR in heritage buildings. As a result, the common methodologies for defect detection in heritage buildings using GRP have been identified.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Concrete buildings},\n%keywords = {Geochemical surveys;},\n%note = {Building rehabilitations;Defect detection;Documentation;Ground Penetrating Radar;Heritage buildings;Heritage sites;Rehabilitation projects;Simulation;Systematic, rehabilitation;Unified method;},\n} \n\n\n
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Heritage sites and buildings are very important for the society and the need for their conservation is becoming increasingly urgent. The unique nature and the significant value of the heritage buildings have created the need for standard unified methods to be used in local heritage building rehabilitation projects. This will allow such important buildings to fit in their own geographical region or policy. Detecting internal defects in the heritage building elements is very important to determine the appropriate rehabilitation methods. However, a non-invasive method needs to be employed in such cases. Ground Penetrating Radar (GPR) technology is found to be an effective method in determining internal features in concrete structures and is expected to be very useful for stone masonry structures usually found in heritage buildings. The main goal of this paper is to identify the main methodologies that applied GPR in heritage buildings. A state-of-the-art review has been conducted to assess the use of GPR in heritage buildings. As a result, the common methodologies for defect detection in heritage buildings using GRP have been identified.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Axial-Flexural Interaction for FRP-Confined Reinforced Masonry Columns.\n \n \n \n\n\n \n Alotaibi, K. S.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n In volume 2022-August, pages 441 - 444, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917118972 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Axial-Flexural Interaction for FRP-Confined Reinforced Masonry Columns},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Alotaibi, Khalid Saqer and AbdelRahman, Belal and Galal, Khaled},\nvolume = {2022-August},\nyear = {2022},\npages = {441 - 444},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper proposes a simplified methodology to predict the axial strength gain and the ultimate strain gain required to establish the axial force-moment interaction diagram of fully grouted reinforced masonry columns (RMCs) strengthened with Fiber Reinforced Polymers (FRP) jackets. The methodology considers short prismatic RMCs failing in a compression controlled-manner and it complies with equilibrium and strain compatibility principles. The proposed procedure is designed to predict the nominal capacity of RMCs for practical design applications, where the columns are subjected to both axial load and bending moment. The essential parameters to perform detailed section analysis are established, and suggested expressions are proposed to obtain the parameters' values. Practical values for the equivalent rectangular stress block parameters are proposed, which represent the actual stress distribution in the compression zone of FRP-confined concrete masonry section. The theoretical axial force-moment interaction diagrams obtained by the proposed procedure were compared with the available experimental data. The experimental test results are in good agreement with the analytical predictions by a good margin. Constant value of 0.80 for the parameters α and β of the equivalent rectangular stress block are recommended for simplicity. The mean absolute percentage error was less than 6% between the experimental data and analytical predictions.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Fiber reinforced plastics},\n%keywords = {Axial loads;Columns (structural);Concrete blocks;Fiber reinforced concrete;Stress concentration;},\n%note = {Axial forces;Confinement;Eccentric loading;Fiber-reinforced polymer;Fiber-reinforced polymers;Fibre reinforced polymers;Interaction diagram;Masonry columns;Reinforced masonry;Reinforced masonry column;},\n} \n\n\n
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This paper proposes a simplified methodology to predict the axial strength gain and the ultimate strain gain required to establish the axial force-moment interaction diagram of fully grouted reinforced masonry columns (RMCs) strengthened with Fiber Reinforced Polymers (FRP) jackets. The methodology considers short prismatic RMCs failing in a compression controlled-manner and it complies with equilibrium and strain compatibility principles. The proposed procedure is designed to predict the nominal capacity of RMCs for practical design applications, where the columns are subjected to both axial load and bending moment. The essential parameters to perform detailed section analysis are established, and suggested expressions are proposed to obtain the parameters' values. Practical values for the equivalent rectangular stress block parameters are proposed, which represent the actual stress distribution in the compression zone of FRP-confined concrete masonry section. The theoretical axial force-moment interaction diagrams obtained by the proposed procedure were compared with the available experimental data. The experimental test results are in good agreement with the analytical predictions by a good margin. Constant value of 0.80 for the parameters α and β of the equivalent rectangular stress block are recommended for simplicity. The mean absolute percentage error was less than 6% between the experimental data and analytical predictions.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n BIM-based seismic loss assessment for instrumented buildings.\n \n \n \n\n\n \n Bahmanoo, S.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 485 - 488, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917118983 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {BIM-based seismic loss assessment for instrumented buildings},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Bahmanoo, Sam and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {485 - 488},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Current generation of Performance-based Earthquake Engineering (PBEE) approach developed at the Pacific Earthquake Engineering Research Center (PEER) or PEER-PBEE is a state-of-the-art approach to predict seismic loss estimation of buildings in terms of repair cost, downtime and other decision variables among the performance-based earthquake engineering (PBEE) frameworks. However, despite its various advantages, the quality of the PEER-PBEE framework can be significantly affected due to considerable sources of uncertainties arising from the lack of building details and actual performance characteristics. Several studies have attempted to tackle the above uncertainties by employing innovative technologies such as seismic instrumentation and Building Information Modelling (BIM) technology. However, no comprehensive systematic methodology has been dedicated to the full engagement of seismic instrumentation and integrated BIM tools in PBEE-based loss assessment frameworks and estimation of seismic resilience. This objective of this study is to develop a systematic methodology to address the limitations associated with PEER-PBEE loss assessment framework by adopting innovative technologies such as seismic instrumentation of buildings and integrated BIM tools. Following steps are proposed as a workflow for estimating seismic loss of buildings: (1) measurement of dynamic response using an ambient vibration test and subsequent output-only system identification (SI), (2) experimental structural analysis by both the model-based and nonmodel-based approaches (3) automated seismic loss analysis through the developed Application Programming Interface (API) tool in BIM platform (based on FEMA P-58 framework). Moreover, the full functionality of the proposed methodology is validated through a real case study.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Cost engineering},\n%keywords = {Dynamic response;Earthquake effects;Intelligent buildings;Model buildings;Nondestructive examination;Pressure vessels;Seismic design;Seismic response;},\n%note = {Applications programming interfaces;Building Information Modelling;FE modeling;FE-modelling;FEMA P-58;Health monitoring;Pacific earthquake engineering research center-performance-based earthquake engineering;Pacific earthquake engineering research centers;Performance-based earthquake engineering;Seismic loss;Seismic loss assessment;Structural health;},\n} \n\n\n
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Current generation of Performance-based Earthquake Engineering (PBEE) approach developed at the Pacific Earthquake Engineering Research Center (PEER) or PEER-PBEE is a state-of-the-art approach to predict seismic loss estimation of buildings in terms of repair cost, downtime and other decision variables among the performance-based earthquake engineering (PBEE) frameworks. However, despite its various advantages, the quality of the PEER-PBEE framework can be significantly affected due to considerable sources of uncertainties arising from the lack of building details and actual performance characteristics. Several studies have attempted to tackle the above uncertainties by employing innovative technologies such as seismic instrumentation and Building Information Modelling (BIM) technology. However, no comprehensive systematic methodology has been dedicated to the full engagement of seismic instrumentation and integrated BIM tools in PBEE-based loss assessment frameworks and estimation of seismic resilience. This objective of this study is to develop a systematic methodology to address the limitations associated with PEER-PBEE loss assessment framework by adopting innovative technologies such as seismic instrumentation of buildings and integrated BIM tools. Following steps are proposed as a workflow for estimating seismic loss of buildings: (1) measurement of dynamic response using an ambient vibration test and subsequent output-only system identification (SI), (2) experimental structural analysis by both the model-based and nonmodel-based approaches (3) automated seismic loss analysis through the developed Application Programming Interface (API) tool in BIM platform (based on FEMA P-58 framework). Moreover, the full functionality of the proposed methodology is validated through a real case study.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Characterization of timber piles using guided waves.\n \n \n \n\n\n \n Cui, S.; and Maghoul, P.\n\n\n \n\n\n\n In volume 2022-August, pages 202 - 203, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119200 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Characterization of timber piles using guided waves},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Cui, Shihao and Maghoul, Pooneh},\nvolume = {2022-August},\nyear = {2022},\npages = {202 - 203},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Timber piles have been widely used in Canada. The pile length is an important index for structural health monitoring (SHM). Therefore, in this paper, a novel technique based on the periodic analysis of the phase difference and the 3-dimensional (3D) guided wave theory was developed to effectively estimate the embedded depth of unknown timber pile foundations. In this method, the guided wave model of a cylindrical pile is built by the spectral element method to determine the dispersion relation. A modified Ridders' algorithm is proposed for root-searching. According to the phase difference of the responses collected by at least two sensors located on the top or the lateral side of the pile, and the dispersion relation obtained by the spectral element method, the dispersion analysis diagram can be obtained to show the relationship between the phase difference and the wavenumber. By the periodic analysis of the dispersion analysis diagram, the pile length can be estimated.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Structural health monitoring},\n%keywords = {Guided electromagnetic wave propagation;Pile foundations;Piles;Timber;},\n%note = {Dispersion relations;Health monitoring;Length estimation;Pile length;Pile length estimation;Pile reuse;Reuse;Ridder' algorithm;Spectral element method;Structural health;Timber piles;Unknown pile;},\n} \n\n\n
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Timber piles have been widely used in Canada. The pile length is an important index for structural health monitoring (SHM). Therefore, in this paper, a novel technique based on the periodic analysis of the phase difference and the 3-dimensional (3D) guided wave theory was developed to effectively estimate the embedded depth of unknown timber pile foundations. In this method, the guided wave model of a cylindrical pile is built by the spectral element method to determine the dispersion relation. A modified Ridders' algorithm is proposed for root-searching. According to the phase difference of the responses collected by at least two sensors located on the top or the lateral side of the pile, and the dispersion relation obtained by the spectral element method, the dispersion analysis diagram can be obtained to show the relationship between the phase difference and the wavenumber. By the periodic analysis of the dispersion analysis diagram, the pile length can be estimated.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Cyclic Response Prediction of Partially Grouted Reinforced Masonry Shear Walls Using Numerical Simulation.\n \n \n \n\n\n \n Elmeligy, O.; Aly, N.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n In volume 2022-August, pages 47 - 49, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119310 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Cyclic Response Prediction of Partially Grouted Reinforced Masonry Shear Walls Using Numerical Simulation},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Elmeligy, Omar and Aly, Nader and AbdelRahman, Belal and Galal, Khaled},\nvolume = {2022-August},\nyear = {2022},\npages = {47 - 49},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Partially grouted reinforced masonry shear walls (PG-RMSWs) have emerged as an efficient and economic seismic force-resisting system in North America. Unlike fully grouted reinforced masonry shear walls (FG-RMSWs), where all masonry cells are grouted, in the PG-RMSWs system, grout is only placed in cells with vertical reinforcement and horizontally reinforced bond beams. This paper proposes two simplified models using Extreme Loading of Structures (ELS) and VecTor2 software to predict the cyclic behaviour of PG-RMSWs constructed with concrete-masonry blocks and having reinforced bond beams. The proposed models are validated against experimentally tested walls available in the literature and are found to be capable of simulating the experimental behaviour. This can be beneficial in structural health monitoring of systems having PG-RMSWs as their seismic force-resisting system (SFRS) by giving good predictions of their response.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Shear walls},\n%keywords = {Concrete beams and girders;Concrete blocks;Reinforced concrete;Retaining walls;},\n%note = {Behavior prediction;Cell-be;Cell/B.E;Cyclic response;Force resisting systems;Masonry shear walls;Partially grouted;Reinforced masonry;Response prediction;Seismic forces;},\n} \n\n\n
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Partially grouted reinforced masonry shear walls (PG-RMSWs) have emerged as an efficient and economic seismic force-resisting system in North America. Unlike fully grouted reinforced masonry shear walls (FG-RMSWs), where all masonry cells are grouted, in the PG-RMSWs system, grout is only placed in cells with vertical reinforcement and horizontally reinforced bond beams. This paper proposes two simplified models using Extreme Loading of Structures (ELS) and VecTor2 software to predict the cyclic behaviour of PG-RMSWs constructed with concrete-masonry blocks and having reinforced bond beams. The proposed models are validated against experimentally tested walls available in the literature and are found to be capable of simulating the experimental behaviour. This can be beneficial in structural health monitoring of systems having PG-RMSWs as their seismic force-resisting system (SFRS) by giving good predictions of their response.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Effects of temperature, analysis and modelling uncertainties on the reliability of base-isolated bridges in Eastern Canada.\n \n \n \n \n\n\n \n Nassar, M.; Guizani, L.; Nollet, M.; and Tahan, A.\n\n\n \n\n\n\n Structures, 37: 295 - 304. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"EffectsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232014108475 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effects of temperature, analysis and modelling uncertainties on the reliability of base-isolated bridges in Eastern Canada},\njournal = {Structures},\nauthor = {Nassar, Mohamad and Guizani, Lotfi and Nollet, Marie-Jose and Tahan, Antoine},\nvolume = {37},\nyear = {2022},\npages = {295 - 304},\nissn = {23520124},\nabstract = {<div data-language="eng" data-ev-field="abstract">The seismic response of base-isolated bridges depends strongly on the seismic isolation system (SIS) properties, which typically vary under the effect of multiple conditions, such as temperature. The North American Bridge Design Codes and the EN-Eurocode 8 recommend a bounding analysis method in order to consider the effect of SIS properties variation with different conditions. However, this method is not founded on a rigorous probabilistic approach, and thus does not impact the reliability of base-isolated bridges. This paper presents an estimate of the seismic reliability and its variation range for a typical two-span concrete base-isolated bridge located in Montreal, a typical site for Eastern Canada. Temperature, bidirectional horizontal seismic hazard and the main parameters affecting the resistance of bridge components, specifically, dimensions, material properties of the bridge pier and SIS properties are all modelled as Random Variables (RVs). Bridge failure associated with two limit states is examined: (1) damage at the pier base by lack of bending moment capacity and (2) SIS failure due to a lack of displacement capacity. The Monte-Carlo method is used to evaluate each limit state's reliability and probability of failure. In earlier studies, epistemic uncertainties (EUs) associated with the modelling and seismic analysis method were either ignored or not thoroughly considered. A main innovation of the present study is to include EUs associated with the seismic response analysis method and the lead core heating of the lead rubber bearing SIS are modelled as RVs. Their margins of variation are estimated, and their probabilistic distribution parameters are identified. The effects of these EUs on the reliability of the bridge are investigated. The effect of the natural rubber material type on the reliability of the bridge is also studied. Preliminary results show that, due to any of these uncertainties, the global reliability index is within a range of [3.36–3.62], whereas the reliability index when these EUs are not included is 3.49. When including the epistemic uncertainty associated with the response analysis method, the reliability index of the pier base flexural behaviour limit state varies between 3.52 and 3.76(as compared to a value of 3.56 obtained without including the above EUs). Similarly, when including the epistemic uncertainty associated with the heating effect, the reliability index of the SIS displacement limit state varies between 3.31, for an extreme effect, and 3.49 for a more representative effect (as compared to a value of 3.51 obtained without including the above EUs). Earlier studies considering fewer variability sources showed that the global seismic reliability varies between 3.47 and 3.52 for the same typical two-span base-isolated bridge in Montreal. In these studies, the SIS material and geometrical properties were considered deterministic. Other sites in Quebec have shown comparable reliabilities to those at the studied site, with a maximum variation of 3% between sites.<br/></div> © 2022},\nkey = {Earthquakes},\n%keywords = {Bearings (structural);Failure (mechanical);Failure analysis;Hysteresis;Monte Carlo methods;Nonmetallic bearings;Piers;Probability distributions;Reliability analysis;Rubber;Seismic design;Seismic response;Structural analysis;Temperature;Uncertainty analysis;},\n%note = {Analysis method;Base-isolated bridges;Epistemic uncertainties;Hysteretic properties;Limit state designs;Lows-temperatures;Reliability-based;Reliability-based approach;Seismic base isolation;Seismic isolation systems;},\nURL = {http://dx.doi.org/10.1016/j.istruc.2022.01.023},\n} \n\n\n
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The seismic response of base-isolated bridges depends strongly on the seismic isolation system (SIS) properties, which typically vary under the effect of multiple conditions, such as temperature. The North American Bridge Design Codes and the EN-Eurocode 8 recommend a bounding analysis method in order to consider the effect of SIS properties variation with different conditions. However, this method is not founded on a rigorous probabilistic approach, and thus does not impact the reliability of base-isolated bridges. This paper presents an estimate of the seismic reliability and its variation range for a typical two-span concrete base-isolated bridge located in Montreal, a typical site for Eastern Canada. Temperature, bidirectional horizontal seismic hazard and the main parameters affecting the resistance of bridge components, specifically, dimensions, material properties of the bridge pier and SIS properties are all modelled as Random Variables (RVs). Bridge failure associated with two limit states is examined: (1) damage at the pier base by lack of bending moment capacity and (2) SIS failure due to a lack of displacement capacity. The Monte-Carlo method is used to evaluate each limit state's reliability and probability of failure. In earlier studies, epistemic uncertainties (EUs) associated with the modelling and seismic analysis method were either ignored or not thoroughly considered. A main innovation of the present study is to include EUs associated with the seismic response analysis method and the lead core heating of the lead rubber bearing SIS are modelled as RVs. Their margins of variation are estimated, and their probabilistic distribution parameters are identified. The effects of these EUs on the reliability of the bridge are investigated. The effect of the natural rubber material type on the reliability of the bridge is also studied. Preliminary results show that, due to any of these uncertainties, the global reliability index is within a range of [3.36–3.62], whereas the reliability index when these EUs are not included is 3.49. When including the epistemic uncertainty associated with the response analysis method, the reliability index of the pier base flexural behaviour limit state varies between 3.52 and 3.76(as compared to a value of 3.56 obtained without including the above EUs). Similarly, when including the epistemic uncertainty associated with the heating effect, the reliability index of the SIS displacement limit state varies between 3.31, for an extreme effect, and 3.49 for a more representative effect (as compared to a value of 3.51 obtained without including the above EUs). Earlier studies considering fewer variability sources showed that the global seismic reliability varies between 3.47 and 3.52 for the same typical two-span base-isolated bridge in Montreal. In these studies, the SIS material and geometrical properties were considered deterministic. Other sites in Quebec have shown comparable reliabilities to those at the studied site, with a maximum variation of 3% between sites.
© 2022\n
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\n \n\n \n \n \n \n \n \n Closing the loop between acquisition and processing: data-driven volumetric SNR estimation vs acquisition design predictions.\n \n \n \n \n\n\n \n Bakulin, A.; Silvestrov, I.; and Leger, P.\n\n\n \n\n\n\n In volume 2022-August, pages 46 - 50, Houston, TX, United states, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"ClosingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20230413446022 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Closing the loop between acquisition and processing: data-driven volumetric SNR estimation vs acquisition design predictions},\njournal = {SEG Technical Program Expanded Abstracts},\nauthor = {Bakulin, Andrey and Silvestrov, Ilya and Leger, Pierre},\nvolume = {2022-August},\nyear = {2022},\npages = {46 - 50},\nissn = {10523812},\naddress = {Houston, TX, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Designing seismic acquisition is a blend of science and art, especially in a desert environment with low signal-to-noise ratios (SNR) of -20 to -60 dB. Basic design driven by the square-root model may be overly simplistic. At the same time, conventional numerical feasibility studies are lengthy and suffer from processor bias. We propose a new workflow that can streamline the design process, remove human bias, and close the loop between acquisition and processing. A central element is a data-driven approach for deriving absolute SNR directly from the data itself. The resulting SNR volumes can be analyzed as volumes, slices, or statistical distribution. Mean SNR over the volume/subvolume can be compared directly with the predicted SNR from acquisition design, thus allowing to quantitatively close the loop, rather than blindly relying on simple theoretical predictions. For feasibility studies, complete automation can be achieved by applying migration in-lieu of processing and data-driven SNR as evaluation steps. We demonstrate the new approach on SEAM Arid data assessing several orthogonal 3D acquisition geometries with 9-geophone arrays and single sensors.<br/></div> © 2022 Society of Exploration Geophysicists and the American Association of Petroleum Geologists.},\nkey = {Signal to noise ratio},\n%keywords = {Data handling;Design;},\n%note = {Data driven;Design-process;Feasibility studies;Human bias;Low signal-to-noise ratio;Seismic acquisition;Signalto- noise ratio estimations;Square-root;Volumetrics;Work-flows;},\nURL = {http://dx.doi.org/10.1190/image2022-3735804.1},\n} \n\n\n
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Designing seismic acquisition is a blend of science and art, especially in a desert environment with low signal-to-noise ratios (SNR) of -20 to -60 dB. Basic design driven by the square-root model may be overly simplistic. At the same time, conventional numerical feasibility studies are lengthy and suffer from processor bias. We propose a new workflow that can streamline the design process, remove human bias, and close the loop between acquisition and processing. A central element is a data-driven approach for deriving absolute SNR directly from the data itself. The resulting SNR volumes can be analyzed as volumes, slices, or statistical distribution. Mean SNR over the volume/subvolume can be compared directly with the predicted SNR from acquisition design, thus allowing to quantitatively close the loop, rather than blindly relying on simple theoretical predictions. For feasibility studies, complete automation can be achieved by applying migration in-lieu of processing and data-driven SNR as evaluation steps. We demonstrate the new approach on SEAM Arid data assessing several orthogonal 3D acquisition geometries with 9-geophone arrays and single sensors.
© 2022 Society of Exploration Geophysicists and the American Association of Petroleum Geologists.\n
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\n \n\n \n \n \n \n \n \n Computational Fluid Mechanics and Hydraulics.\n \n \n \n \n\n\n \n Shakibaeinia, A.; and Zarrati, A. R.\n\n\n \n\n\n\n Water (Switzerland), 14(24). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ComputationalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20225213311058 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Computational Fluid Mechanics and Hydraulics},\njournal = {Water (Switzerland)},\nauthor = {Shakibaeinia, Ahmad and Zarrati, Amir Reza},\nvolume = {14},\nnumber = {24},\nyear = {2022},\nissn = {20734441},\nURL = {http://dx.doi.org/10.3390/w14243985},\n} \n\n\n
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\n \n\n \n \n \n \n \n \n A New Spatiotemporal Estimator to Downscale GRACE Gravity Models for Terrestrial and Groundwater Storage Variations Estimation.\n \n \n \n \n\n\n \n Fatolazadeh, F.; Eshagh, M.; Goita, K.; and Wang, S.\n\n\n \n\n\n\n Remote Sensing, 14(23). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20225013249106 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A New Spatiotemporal Estimator to Downscale GRACE Gravity Models for Terrestrial and Groundwater Storage Variations Estimation},\njournal = {Remote Sensing},\nauthor = {Fatolazadeh, Farzam and Eshagh, Mehdi and Goita, Kalifa and Wang, Shusen},\nvolume = {14},\nnumber = {23},\nyear = {2022},\nissn = {20724292},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study proposes a new mathematical approach to downscale monthly terrestrial water storage anomalies (TWSA) from the Gravity Recovery and Climate Experiment (GRACE) and estimates groundwater storage anomalies (GWSA) at a daily temporal resolution and a spatial resolution of 0.25° × 0.25°, simultaneously. The method combines monthly 3° GRACE gravity models and daily 0.25° hydrological model outputs and their uncertainties in the spectral domain by minimizing the mean-square error (MSE) of their estimator to enhance the quality of both low and high frequency signals in the estimated TWSA and GWSA. The Global Land Data Assimilation System (GLDAS) was the hydrological model considered in this study. The estimator was tested over Alberta, Saskatchewan, and Manitoba (Canada), especially over the Province of Alberta, using data from 65 in-situ piezometric wells for 2003. Daily minimum and maximum GWS varied from 14 mm to 32 mm across the study area. A comparison of the estimated GWSA with the corresponding in-situ wells showed significant and consistent correlations in most cases, with r = 0.43–0.92 (mean r = 0.73). Correlations were >0.70 for approximately 70% of the wells, with root mean square errors <24 mm. These results provide evidence for using the proposed spectral combination estimator in downscaling GRACE data on a daily basis at a spatial scale of 0.25° × 0.25°.<br/></div> © 2022 by the authors.},\nkey = {Digital storage},\n%keywords = {Climate models;Frequency estimation;Geodetic satellites;Groundwater;Mean square error;Uncertainty analysis;},\n%note = {Daily spatiotemporal downscaling;Down-scaling;Gravity modeling;Gravity recovery and climate experiment satellites;Gravity recovery and climate experiments;Groundwater storage;Groundwater storage change;Spectral combination;Storage changes;Terrestrial water storage;},\nURL = {http://dx.doi.org/10.3390/rs14235991},\n} \n\n\n
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This study proposes a new mathematical approach to downscale monthly terrestrial water storage anomalies (TWSA) from the Gravity Recovery and Climate Experiment (GRACE) and estimates groundwater storage anomalies (GWSA) at a daily temporal resolution and a spatial resolution of 0.25° × 0.25°, simultaneously. The method combines monthly 3° GRACE gravity models and daily 0.25° hydrological model outputs and their uncertainties in the spectral domain by minimizing the mean-square error (MSE) of their estimator to enhance the quality of both low and high frequency signals in the estimated TWSA and GWSA. The Global Land Data Assimilation System (GLDAS) was the hydrological model considered in this study. The estimator was tested over Alberta, Saskatchewan, and Manitoba (Canada), especially over the Province of Alberta, using data from 65 in-situ piezometric wells for 2003. Daily minimum and maximum GWS varied from 14 mm to 32 mm across the study area. A comparison of the estimated GWSA with the corresponding in-situ wells showed significant and consistent correlations in most cases, with r = 0.43–0.92 (mean r = 0.73). Correlations were >0.70 for approximately 70% of the wells, with root mean square errors <24 mm. These results provide evidence for using the proposed spectral combination estimator in downscaling GRACE data on a daily basis at a spatial scale of 0.25° × 0.25°.
© 2022 by the authors.\n
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\n \n\n \n \n \n \n \n \n Robust Synchronization of Ambient Vibration Time Histories Based on Phase Angle Compensations and Kernel Density Function.\n \n \n \n \n\n\n \n Saeed, S.; Chouinard, L.; and Sajid, S.\n\n\n \n\n\n\n Sensors, 22(22). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"RobustPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224813177905 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Robust Synchronization of Ambient Vibration Time Histories Based on Phase Angle Compensations and Kernel Density Function},\njournal = {Sensors},\nauthor = {Saeed, Salman and Chouinard, Luc and Sajid, Sikandar},\nvolume = {22},\nnumber = {22},\nyear = {2022},\nissn = {14248220},\nabstract = {<div data-language="eng" data-ev-field="abstract">The output-only modal analysis is ubiquitously used for structural health monitoring of civil engineering systems. The measurements for such applications require the use of multiple data acquisition systems (DAS) to avoid complicated meshes of cables in high-rise buildings, avoid traffic constriction on a bridge during measurements, or to avoid having limited channels in a single DAS. Nevertheless, such requirements introduce time synchronization problems which potentially lead to erroneous structural dynamic characterization and hence misleading or inconclusive structural health monitoring results. This research aims at proposing a system-identification-based time synchronization algorithm for output-only modal analysis using multiple DAS. A new procedure based on the compensation of the phase angle shifts is proposed to identify and address the time synchronization issue in ambient vibration data measured through multiple DAS. To increase the robustness of the proposed algorithm to the inherent inconsistencies in these datasets, the kernel density function is applied to rank multiple time-shift estimates that are sometimes detected by the algorithm when inaccuracies exist in the data arising from low signal-to-noise ratio and/or presence of colored noise in the ambient excitations. First, the synchronized ambient vibration dataset of a full-scale bridge is artificially de-synchronized and used to present a proof of concept for the proposed algorithm. Next, the algorithm is applied to ambient vibration data of a 30-story, reinforced concrete building, where the synchronization of the data could not be achieved using two DAS despite best efforts. The application of the proposed time synchronization algorithm is shown to both detect and correct the time synchronization discrepancies in the output-only modal analysis.<br/></div> © 2022 by the authors.},\nkey = {Structural health monitoring},\n%keywords = {Cable stayed bridges;Data acquisition;Modal analysis;Reinforced concrete;Religious buildings;Signal to noise ratio;Singular value decomposition;Structural dynamics;Synchronization;Tall buildings;Vibration analysis;},\n%note = {Ambient vibration test;Ambient vibrations;Data acquisition system;Data synchronization;Kernel density function;Multiple data;Operational modal analysis;Output-only modal analysis;System-identification;Time synchronization;},\nURL = {http://dx.doi.org/10.3390/s22228835},\n} \n\n\n
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The output-only modal analysis is ubiquitously used for structural health monitoring of civil engineering systems. The measurements for such applications require the use of multiple data acquisition systems (DAS) to avoid complicated meshes of cables in high-rise buildings, avoid traffic constriction on a bridge during measurements, or to avoid having limited channels in a single DAS. Nevertheless, such requirements introduce time synchronization problems which potentially lead to erroneous structural dynamic characterization and hence misleading or inconclusive structural health monitoring results. This research aims at proposing a system-identification-based time synchronization algorithm for output-only modal analysis using multiple DAS. A new procedure based on the compensation of the phase angle shifts is proposed to identify and address the time synchronization issue in ambient vibration data measured through multiple DAS. To increase the robustness of the proposed algorithm to the inherent inconsistencies in these datasets, the kernel density function is applied to rank multiple time-shift estimates that are sometimes detected by the algorithm when inaccuracies exist in the data arising from low signal-to-noise ratio and/or presence of colored noise in the ambient excitations. First, the synchronized ambient vibration dataset of a full-scale bridge is artificially de-synchronized and used to present a proof of concept for the proposed algorithm. Next, the algorithm is applied to ambient vibration data of a 30-story, reinforced concrete building, where the synchronization of the data could not be achieved using two DAS despite best efforts. The application of the proposed time synchronization algorithm is shown to both detect and correct the time synchronization discrepancies in the output-only modal analysis.
© 2022 by the authors.\n
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\n \n\n \n \n \n \n \n \n Discussion of \"Small strain shear modulus and damping ratio of two unsaturated lateritic sandy clays\".\n \n \n \n \n\n\n \n Karray, M.; Lashin, I.; and Abdellaziz, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 59(12): 2202 - 2204. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"DiscussionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224813175579 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Discussion of "Small strain shear modulus and damping ratio of two unsaturated lateritic sandy clays"},\njournal = {Canadian Geotechnical Journal},\nauthor = {Karray, Mourad and Lashin, Ibrahim and Abdellaziz, Mustapha},\nvolume = {59},\nnumber = {12},\nyear = {2022},\npages = {2202 - 2204},\nissn = {00083674},\nURL = {http://dx.doi.org/10.1139/cgj-2022-0104},\n} \n\n\n
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\n \n\n \n \n \n \n \n \n Predicting Chlorine and Trihalomethanes in a Full-Scale Water Distribution System under Changing Operating Conditions.\n \n \n \n \n\n\n \n Absalan, F.; Hatam, F.; Barbeau, B.; Prevost, M.; and Bichai, F.\n\n\n \n\n\n\n Water (Switzerland), 14(22). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"PredictingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224813163909 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Predicting Chlorine and Trihalomethanes in a Full-Scale Water Distribution System under Changing Operating Conditions},\njournal = {Water (Switzerland)},\nauthor = {Absalan, Faezeh and Hatam, Fatemeh and Barbeau, Benoit and Prevost, Michele and Bichai, Francoise},\nvolume = {14},\nnumber = {22},\nyear = {2022},\nissn = {20734441},\nabstract = {<div data-language="eng" data-ev-field="abstract">Predicting free chlorine residual and Trihalomethanes (THMs) in water distribution systems (DS) is challenging, given the variability and imprecise description of the chlorination conditions prevailing in full-scale systems. In this work, we used the variable reaction rate constant (VRRC) model, which offers the advantage of describing variable applied dosage and rechlorination conditions without the need for model recalibration. The VRRC model successfully predicted chlorine decay and THMs formation in ammonia-containing water at the lab scale. Comparing the goodness of fit results showed a better fit by the VRRC model than the 1st-order and an equally good fit compared to the parallel 1st-order model. However, the independence of the VRRC coefficients upon chlorine dosage made it a better choice for full-scale implementation than the parallel 1st-order model. Chlorine and THMs predictions in the DS were performed in 22 locations from a full-scale DS in southern Quebec (Canada). Chlorine predictions by VRRC were conducted in the spring and fall of 2021 under changing water quality conditions (temperature, DOC, dosage). With a prediction target of 0.1 mg/L absolute error, the VRRC model met this target in 77% of the points in the spring and 73% in the fall. While the predictions were comparable and slightly better than those of the 1st-order model, the main advantage of the VRRC was its applicability under variable dosage and rechlorination conditions (e.g., booster chlorination). THMs predictions in the DS were successfully performed in fall 2021. While 91% of the nodes had less than 5 (Formula presented.) of absolute prediction error with the VRRC model, the 1st-order model only met this target in 1 out of 22 points. In addition to its high precision, the VRRC can predict THMs using only the lab scale experiments for model parametrization. This enables small utilities with limited resources to predict the possibility of THMs non-compliances under changing water quality conditions with simple lab-based experiments. Changing climatic conditions can deteriorate drinking water quality, raise regulatory concerns for chlorine and THMs, and threaten public health. Water utilities can use the simple approach proposed in this work to assess the possibility of non-compliance under changing conditions. Moreover, the efficiency of different interventions or mitigation strategies to resolve or avoid non-compliance can be evaluated with this approach.<br/></div> © 2022 by the authors.},\nkey = {Chlorine},\n%keywords = {Ammonia;Chlorination;Forecasting;Laboratories;Potable water;Rate constants;Water distribution systems;Water quality;},\n%note = {Changing operating conditions;Chlorine prediction;Condition;Distribution systems;Global change;Non-compliance;Reaction rate constants;Trihalomethane prediction;Trihalomethanes;Water distribution networks;},\nURL = {http://dx.doi.org/10.3390/w14223685},\n} \n\n\n
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Predicting free chlorine residual and Trihalomethanes (THMs) in water distribution systems (DS) is challenging, given the variability and imprecise description of the chlorination conditions prevailing in full-scale systems. In this work, we used the variable reaction rate constant (VRRC) model, which offers the advantage of describing variable applied dosage and rechlorination conditions without the need for model recalibration. The VRRC model successfully predicted chlorine decay and THMs formation in ammonia-containing water at the lab scale. Comparing the goodness of fit results showed a better fit by the VRRC model than the 1st-order and an equally good fit compared to the parallel 1st-order model. However, the independence of the VRRC coefficients upon chlorine dosage made it a better choice for full-scale implementation than the parallel 1st-order model. Chlorine and THMs predictions in the DS were performed in 22 locations from a full-scale DS in southern Quebec (Canada). Chlorine predictions by VRRC were conducted in the spring and fall of 2021 under changing water quality conditions (temperature, DOC, dosage). With a prediction target of 0.1 mg/L absolute error, the VRRC model met this target in 77% of the points in the spring and 73% in the fall. While the predictions were comparable and slightly better than those of the 1st-order model, the main advantage of the VRRC was its applicability under variable dosage and rechlorination conditions (e.g., booster chlorination). THMs predictions in the DS were successfully performed in fall 2021. While 91% of the nodes had less than 5 (Formula presented.) of absolute prediction error with the VRRC model, the 1st-order model only met this target in 1 out of 22 points. In addition to its high precision, the VRRC can predict THMs using only the lab scale experiments for model parametrization. This enables small utilities with limited resources to predict the possibility of THMs non-compliances under changing water quality conditions with simple lab-based experiments. Changing climatic conditions can deteriorate drinking water quality, raise regulatory concerns for chlorine and THMs, and threaten public health. Water utilities can use the simple approach proposed in this work to assess the possibility of non-compliance under changing conditions. Moreover, the efficiency of different interventions or mitigation strategies to resolve or avoid non-compliance can be evaluated with this approach.
© 2022 by the authors.\n
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\n \n\n \n \n \n \n \n \n New spectro-spatial downscaling approach for terrestrial and groundwater storage variations estimated by GRACE models.\n \n \n \n \n\n\n \n Fatolazadeh, F.; Eshagh, M.; and Goita, K.\n\n\n \n\n\n\n Journal of Hydrology, 615. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"NewPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224713150702 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {New spectro-spatial downscaling approach for terrestrial and groundwater storage variations estimated by GRACE models},\njournal = {Journal of Hydrology},\nauthor = {Fatolazadeh, Farzam and Eshagh, Mehdi and Goita, Kalifa},\nvolume = {615},\nyear = {2022},\nissn = {00221694},\nabstract = {<div data-language="eng" data-ev-field="abstract">The study proposes a new mathematical method, referred to as spectral combination, to downscale Gravity Recovery And Climate Experiment (GRACE) observations. The goal is to improve the spatial resolution of GRACE from 1&ring; to 0.25&ring;, based upon available hydrological variables. First, a new approach based upon condition adjustment is proposed to estimate uncertainties related to hydrological variables. Second, a spectral-spatial estimator is developed to derive downscaled Total Water Storage Anomalies (TWSA) by optimally combining GRACE models and hydrological variables. Last, groundwater storage anomalies (GWSA) are derived from the downscaled TWSA. The proposed spectral combination approach was tested over the Canadian Prairies by considering GRACE data and required Global Land Data Assimilation System (GLDAS) variables for February 2003 to December 2016. The results reveal greater details in TWSA after spatial downscaling. Quantitatively, retrieved downscaled GWSA were validated using 75 unconfined in situ piezometric wells that were distributed across the Province of Alberta. A correlation of 0.80, with an RMSE of 11 mm, was obtained after downscaling with all wells over the validation area. These results are better than those obtained before downscaling (correlation of 0.42, with an RMSE of 21.4 mm), demonstrating that the proposed approach is successful.<br/></div> © 2022 The Author(s)},\nkey = {Digital storage},\n%keywords = {Estimation;Geodetic satellites;Groundwater;Uncertainty analysis;Water conservation;},\n%note = {Down-scaling;Experiment modeling;Gravity recovery and climate experiment satellites;Gravity recovery and climate experiments;Groundwater storage;Groundwater storage variation;Hydrological variables;Spatial downscaling;Spectral combination;Water storage;},\nURL = {http://dx.doi.org/10.1016/j.jhydrol.2022.128635},\n} \n\n\n
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The study proposes a new mathematical method, referred to as spectral combination, to downscale Gravity Recovery And Climate Experiment (GRACE) observations. The goal is to improve the spatial resolution of GRACE from 1˚ to 0.25˚, based upon available hydrological variables. First, a new approach based upon condition adjustment is proposed to estimate uncertainties related to hydrological variables. Second, a spectral-spatial estimator is developed to derive downscaled Total Water Storage Anomalies (TWSA) by optimally combining GRACE models and hydrological variables. Last, groundwater storage anomalies (GWSA) are derived from the downscaled TWSA. The proposed spectral combination approach was tested over the Canadian Prairies by considering GRACE data and required Global Land Data Assimilation System (GLDAS) variables for February 2003 to December 2016. The results reveal greater details in TWSA after spatial downscaling. Quantitatively, retrieved downscaled GWSA were validated using 75 unconfined in situ piezometric wells that were distributed across the Province of Alberta. A correlation of 0.80, with an RMSE of 11 mm, was obtained after downscaling with all wells over the validation area. These results are better than those obtained before downscaling (correlation of 0.42, with an RMSE of 21.4 mm), demonstrating that the proposed approach is successful.
© 2022 The Author(s)\n
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\n \n\n \n \n \n \n \n \n Positive Correlation between DYFI Intensity Data and Microzonation Site Classes for Ottawa, Quebec City, and the Metropolitan Area of Montreal.\n \n \n \n \n\n\n \n Rosset, P.; Bent, A.; Halchuk, S.; and Chouinard, L.\n\n\n \n\n\n\n Seismological Research Letters, 93(6): 3468 - 3480. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"PositivePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224713141701 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Positive Correlation between DYFI Intensity Data and Microzonation Site Classes for Ottawa, Quebec City, and the Metropolitan Area of Montreal},\njournal = {Seismological Research Letters},\nauthor = {Rosset, Philippe and Bent, Allison and Halchuk, Stephen and Chouinard, Luc},\nvolume = {93},\nnumber = {6},\nyear = {2022},\npages = {3468 - 3480},\nissn = {08950695},\nabstract = {<div data-language="eng" data-ev-field="abstract">At the local scale, seismic risk is often poorly estimated when considering equal hazard values across any given community. Indeed, past damaging earthquakes have shown that site conditions, which may amplify or deamplify ground shaking, have an influence on the spatial distribution of damage in urban areas. In eastern Canada, Leda clay deposits from the old Champlain Sea are of particular concern for strong site effects in many parts of Quebec and Ontario. To capture the variability in seismic site response, microzonation maps characterizing average shear wave velocity for the upper 30 m of soil, and predominant resonance frequency have been developed for Montreal, Ottawa, and Quebec City. The maps derived from seismic and borehole measurements have been used to develop shake map scenarios but have not been validated, because there have not been any significantly large, close earthquakes in recent years, and because the seismograph network coverage is not adequate to provide a detailed picture of variations in shaking across a city. Nevertheless, all the three cities are in or near active seismic zones, and felt reports, although less accurate than instrumental data, are numerous and provide a dense dataset showing relative shaking levels across a region. Using intensity data for several moderate earthquakes collected largely via the Canadian internet "Did You Feel It?" page, we systematically compare reported shaking levels to soil conditions indicated by the microzonation maps. This study shows a clear correlation between high-reported intensities and soft soils for Montreal where the number of observations is the largest. The results suggest that intensity data collected via the internet and social media could provide a viable method for validating microzonation maps and shaking scenarios.<br/></div> © Seismological Society of America.},\nkey = {Earthquakes},\n%keywords = {Clay deposits;Risk perception;Seismic response;Shear flow;Shear waves;Soils;Urban growth;Wave propagation;},\n%note = {Ground-shaking;Intensity data;Local scale;Metropolitan area;Microzonation;Positive correlations;Quebec city;Seismic risk;Site conditions;Urban areas;},\nURL = {http://dx.doi.org/10.1785/0220220144},\n} \n\n\n
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At the local scale, seismic risk is often poorly estimated when considering equal hazard values across any given community. Indeed, past damaging earthquakes have shown that site conditions, which may amplify or deamplify ground shaking, have an influence on the spatial distribution of damage in urban areas. In eastern Canada, Leda clay deposits from the old Champlain Sea are of particular concern for strong site effects in many parts of Quebec and Ontario. To capture the variability in seismic site response, microzonation maps characterizing average shear wave velocity for the upper 30 m of soil, and predominant resonance frequency have been developed for Montreal, Ottawa, and Quebec City. The maps derived from seismic and borehole measurements have been used to develop shake map scenarios but have not been validated, because there have not been any significantly large, close earthquakes in recent years, and because the seismograph network coverage is not adequate to provide a detailed picture of variations in shaking across a city. Nevertheless, all the three cities are in or near active seismic zones, and felt reports, although less accurate than instrumental data, are numerous and provide a dense dataset showing relative shaking levels across a region. Using intensity data for several moderate earthquakes collected largely via the Canadian internet \"Did You Feel It?\" page, we systematically compare reported shaking levels to soil conditions indicated by the microzonation maps. This study shows a clear correlation between high-reported intensities and soft soils for Montreal where the number of observations is the largest. The results suggest that intensity data collected via the internet and social media could provide a viable method for validating microzonation maps and shaking scenarios.
© Seismological Society of America.\n
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\n \n\n \n \n \n \n \n \n Potential of L- and C- Bands Polarimetric SAR Data for Monitoring Soil Moisture over Forested Sites.\n \n \n \n \n\n\n \n Magagi, R.; Jammali, S.; Goita, K.; Wang, H.; and Colliander, A.\n\n\n \n\n\n\n Remote Sensing, 14(21). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"PotentialPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224613126814 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Potential of L- and C- Bands Polarimetric SAR Data for Monitoring Soil Moisture over Forested Sites},\njournal = {Remote Sensing},\nauthor = {Magagi, Ramata and Jammali, Safa and Goita, Kalifa and Wang, Hongquan and Colliander, Andreas},\nvolume = {14},\nnumber = {21},\nyear = {2022},\nissn = {20724292},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study investigates the potential of L- and C- bands Polarimetric Synthetic Aperture Radar (PolSAR) data to monitor soil moisture over the forested sites of SMAP Validation Experiment 2012 (SMAPVEX12). The optimal backscattering coefficients and polarimetric parameters to characterize the soil moisture were determined based on L-band Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR), C-band RADARSAT-2, and ground measurements composed of soil and vegetation parameters collected during SMAPVEX12. Linear and circular backscattering coefficients (σ<sup>0</sup>) and polarimetric parameters such as correlation coefficients (ρ<inf>HHVV</inf>) and phase difference (φ<inf>HHVV</inf>) between HH and VV, pedestal height (PH), entropy (H), anisotropy (A), α angle, surface (Ps), and double bounce (Pd) powers were used to develop the relationships with soil moisture. The analysis of these relationships shows that over the forested sites of SMAPVEX12: (a) at L-band several optimal backscattering coefficients and polarimetric parameters allow the monitoring of soil moisture, particularly the linear and circular σ<sup>0</sup> (r = 0.60–0.96), Ps (r = 0.59–0.84), Pd (r = 0.60–0.82), ρ<inf>HHHV</inf>_30°, ρ<inf>VVHV</inf>_30°, φ<inf>HHHV</inf>_30° and φ<inf>HHVV</inf>_30° (r = 0.56–0.81). However, compared to the results obtained with σ<sup>0</sup>, there is no added value of the polarimetric parameters for soil moisture retrievals. (b) at C-band, only a few polarimetric parameters φ<inf>HHHV</inf>, φ<inf>VVHV</inf>, and φ<inf>HHVV</inf> are correlated with soil moisture (r = ~0.90). They can contribute to soil moisture retrievals over forested sites when L-band data are not available.<br/></div> © 2022 by the authors.},\nkey = {Soil moisture},\n%keywords = {Antennas;Backscattering;Forestry;Moisture control;Monitoring;Polarimeters;Soil surveys;Synthetic aperture radar;},\n%note = {Backscattering coefficients;C-bands;Coefficient parameters;Forested sites;L-band;Polarimetric parameters;Polarimetric SAR data;Polarimetric synthetic aperture radar data;SMAP validation experiment 2012;Soil moisture retrievals;},\nURL = {http://dx.doi.org/10.3390/rs14215317},\n} \n\n\n
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This study investigates the potential of L- and C- bands Polarimetric Synthetic Aperture Radar (PolSAR) data to monitor soil moisture over the forested sites of SMAP Validation Experiment 2012 (SMAPVEX12). The optimal backscattering coefficients and polarimetric parameters to characterize the soil moisture were determined based on L-band Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR), C-band RADARSAT-2, and ground measurements composed of soil and vegetation parameters collected during SMAPVEX12. Linear and circular backscattering coefficients (σ0) and polarimetric parameters such as correlation coefficients (ρHHVV) and phase difference (φHHVV) between HH and VV, pedestal height (PH), entropy (H), anisotropy (A), α angle, surface (Ps), and double bounce (Pd) powers were used to develop the relationships with soil moisture. The analysis of these relationships shows that over the forested sites of SMAPVEX12: (a) at L-band several optimal backscattering coefficients and polarimetric parameters allow the monitoring of soil moisture, particularly the linear and circular σ0 (r = 0.60–0.96), Ps (r = 0.59–0.84), Pd (r = 0.60–0.82), ρHHHV_30°, ρVVHV_30°, φHHHV_30° and φHHVV_30° (r = 0.56–0.81). However, compared to the results obtained with σ0, there is no added value of the polarimetric parameters for soil moisture retrievals. (b) at C-band, only a few polarimetric parameters φHHHV, φVVHV, and φHHVV are correlated with soil moisture (r =  0.90). They can contribute to soil moisture retrievals over forested sites when L-band data are not available.
© 2022 by the authors.\n
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\n \n\n \n \n \n \n \n \n Development of a sustainability rating tool for heritage buildings: future implications.\n \n \n \n \n\n\n \n Al-Sakkaf, A.; Zayed, T.; Bagchi, A.; Mahmoud, S.; and Pickup, D.\n\n\n \n\n\n\n Smart and Sustainable Built Environment, 11(1): 93 - 109. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"DevelopmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224413046875 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Development of a sustainability rating tool for heritage buildings: future implications},\njournal = {Smart and Sustainable Built Environment},\nauthor = {Al-Sakkaf, Abobakr and Zayed, Tarek and Bagchi, Ashutosh and Mahmoud, Sherif and Pickup, David},\nvolume = {11},\nnumber = {1},\nyear = {2022},\npages = {93 - 109},\nissn = {20466099},\nabstract = {<div data-language="eng" data-ev-field="abstract">Purpose: Heritage buildings are significant for their historical and architectural value. Due to the lack of rating systems designed specifically for heritage buildings, it is essential to develop and validate a heritage building assessment tool that considers its specific characteristics. The purpose of this study is to provide an extensive review of research on Sustainability of Heritage Buildings (SHBs). Design/methodology/approach: This review highlights methodologies applied in SHBs research and analyzes major global rating systems in order to identify their deficiencies for SHBs assessment. A systematic review was employed and articles from the top 10 high impact factor journals were studied. Twelve major global rating systems and their assessment criteria were identified. Findings: Significant variability was observed among the assessment tools since each tool assesses several criteria, factors and indicators that fit its local context. Part of this variability can also be seen in the rating scales, threshold values and accreditation titles. As a result, the final sustainability ranking for a given building cannot be compared among the 12 rating systems. Most importantly, these systems fail to analyze some factors such as energy that are considered important with respect to heritage building assessment. Originality/value: Since no specific rating system could be identified in this review as the most appropriate for heritage buildings, a new sustainability assessment tool that is specific to heritage buildings should be developed. Such a tool will enable facility managers to evaluate and improve the sustainability of their heritage buildings while preserving them.<br/></div> © 2020, Emerald Publishing Limited.},\nURL = {http://dx.doi.org/10.1108/SASBE-04-2020-0047},\n} \n\n\n
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Purpose: Heritage buildings are significant for their historical and architectural value. Due to the lack of rating systems designed specifically for heritage buildings, it is essential to develop and validate a heritage building assessment tool that considers its specific characteristics. The purpose of this study is to provide an extensive review of research on Sustainability of Heritage Buildings (SHBs). Design/methodology/approach: This review highlights methodologies applied in SHBs research and analyzes major global rating systems in order to identify their deficiencies for SHBs assessment. A systematic review was employed and articles from the top 10 high impact factor journals were studied. Twelve major global rating systems and their assessment criteria were identified. Findings: Significant variability was observed among the assessment tools since each tool assesses several criteria, factors and indicators that fit its local context. Part of this variability can also be seen in the rating scales, threshold values and accreditation titles. As a result, the final sustainability ranking for a given building cannot be compared among the 12 rating systems. Most importantly, these systems fail to analyze some factors such as energy that are considered important with respect to heritage building assessment. Originality/value: Since no specific rating system could be identified in this review as the most appropriate for heritage buildings, a new sustainability assessment tool that is specific to heritage buildings should be developed. Such a tool will enable facility managers to evaluate and improve the sustainability of their heritage buildings while preserving them.
© 2020, Emerald Publishing Limited.\n
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\n \n\n \n \n \n \n \n \n Two-dimensional basin-scale seismic site effects in the Kitimat Valley, British Columbia, Canada: A practical example of using a fast hybrid FE/BE method.\n \n \n \n \n\n\n \n Amini, D.; Maghoul, P.; Perret, D.; and Gatmiri, B.\n\n\n \n\n\n\n Engineering Geology, 311. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"Two-dimensionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224413043656 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Two-dimensional basin-scale seismic site effects in the Kitimat Valley, British Columbia, Canada: A practical example of using a fast hybrid FE/BE method},\njournal = {Engineering Geology},\nauthor = {Amini, Dana and Maghoul, Pooneh and Perret, Didier and Gatmiri, Behrouz},\nvolume = {311},\nyear = {2022},\nissn = {00137952},\nabstract = {<div data-language="eng" data-ev-field="abstract">The two-dimensional (2-D) basin-scale seismic site response of the Kitimat valley, located in the North Coast region of British Columbia, Canada, was investigated. The valley was subjected to a synthetic ground motion corresponding to a realistic local crustal earthquake of moderate magnitude consistent with the prevailing seismic hazard in the Kitimat region. SiteQUAKE, a fast hybrid finite element (FE)/boundary element (BE) numerical code was used for analyses, in which linear and equivalent-linear soil behavior models were implemented. The near-field (the sedimentary basin infill) and far-field (surrounding bedrock) were modeled by the FE and BE methods, respectively. Responses at different locations along a cross-section were compared with the input motion to illustrate the importance of basin effects. By dissociating the peak ground responses affected by the sub-surface topography (basin emptied of its infill) and by the presence of the sediment infill, it was shown that one-dimensional (1-D) analyses can either underestimate or overestimate 2-D seismic responses, highlighting their inability and insufficiency to correctly address basin effects.<br/></div> © 2022},\nkey = {Seismic response},\n%keywords = {Earthquake effects;Infill drilling;Landforms;Numerical methods;Topography;},\n%note = {Basin effects;Basin scale;Boundary elements;Boundary-element methods;British Columbia;Hybrid finite element/boundary element numerical modeling;Hybrid finite elements;Kitimat valley;Seismic site effect;Two-dimensional;},\nURL = {http://dx.doi.org/10.1016/j.enggeo.2022.106872},\n} \n\n\n
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The two-dimensional (2-D) basin-scale seismic site response of the Kitimat valley, located in the North Coast region of British Columbia, Canada, was investigated. The valley was subjected to a synthetic ground motion corresponding to a realistic local crustal earthquake of moderate magnitude consistent with the prevailing seismic hazard in the Kitimat region. SiteQUAKE, a fast hybrid finite element (FE)/boundary element (BE) numerical code was used for analyses, in which linear and equivalent-linear soil behavior models were implemented. The near-field (the sedimentary basin infill) and far-field (surrounding bedrock) were modeled by the FE and BE methods, respectively. Responses at different locations along a cross-section were compared with the input motion to illustrate the importance of basin effects. By dissociating the peak ground responses affected by the sub-surface topography (basin emptied of its infill) and by the presence of the sediment infill, it was shown that one-dimensional (1-D) analyses can either underestimate or overestimate 2-D seismic responses, highlighting their inability and insufficiency to correctly address basin effects.
© 2022\n
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\n \n\n \n \n \n \n \n \n Dynamic LCA of the increased use of wood in buildings and its consequences: Integration of CO2 sequestration and material substitutions.\n \n \n \n \n\n\n \n Cordier, S.; Blanchet, P.; Robichaud, F.; and Amor, B.\n\n\n \n\n\n\n Building and Environment, 226. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"DynamicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224413044287 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Dynamic LCA of the increased use of wood in buildings and its consequences: Integration of CO2 sequestration and material substitutions},\njournal = {Building and Environment},\nauthor = {Cordier, Sylvain and Blanchet, Pierre and Robichaud, Francois and Amor, Ben},\nvolume = {226},\nyear = {2022},\nissn = {03601323},\nabstract = {<div data-language="eng" data-ev-field="abstract">Wood products can have a lower impact on climate change (CC) than other building materials, and their carbon content can transform buildings into temporary carbon sinks. However, the large-scale use of wood products in buildings requires a better understanding of their consequences to support CC policies. The consequential life cycle inventory of such products contains elementary flows with values sometimes greater sometimes less than zero. Therefore, their static assessment did not show the influence of carbon uptake and release, either during or after the temporal boundary of the system. The originality lies in the combination of the dynamic modeling of tree harvesting and growth, temporary carbon storage, end-of-life (EOL) strategies, material substitution, and characterization factors in a consequential life cycle assessment (LCA). This combination highlights the extent to which material substitution, EOL strategies, and carbon sequestration can be decisive. In addition, it addresses the static and dynamic measurements of radiative forcing (W.m<sup>−2</sup>) and the carbon dioxide (CO<inf>2</inf>) equivalent (CO<inf>2</inf>eq.). In this case study, material substitution contributed the most to result, followed by post-harvest CO<inf>2</inf> sequestration. In terms of metrics, the conventional static LCA overestimates the long-term cumulative impact on CC (tonne CO<inf>2</inf>eq.) without providing information on the short-term impact of the case study. In addition, the assessment of such a dynamic consequential life cycle inventory (LCI) with a dynamic metric provides more specific information, regardless of the temporal boundary. However, the absolute dynamic metrics (W.m<sup>−2</sup>) should support the relative dynamic metric (tonne CO<inf>2</inf>eq.<inf>1st year</inf>) to avoid misleading conclusions.<br/></div> © 2022 Elsevier Ltd},\nkey = {Carbon dioxide},\n%keywords = {Atmospheric radiation;Climate change;Forestry;Life cycle;Wood products;Wooden buildings;},\n%note = {Building environment;Carbon stocks;Climate change assessment;Consequential life-cycle assessment;Dynamic climate change assessment;Dynamic metrics;In-buildings;Life Cycle Inventory;Materials substitutions;Wooden structure;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2022.109695},\n} \n\n\n
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Wood products can have a lower impact on climate change (CC) than other building materials, and their carbon content can transform buildings into temporary carbon sinks. However, the large-scale use of wood products in buildings requires a better understanding of their consequences to support CC policies. The consequential life cycle inventory of such products contains elementary flows with values sometimes greater sometimes less than zero. Therefore, their static assessment did not show the influence of carbon uptake and release, either during or after the temporal boundary of the system. The originality lies in the combination of the dynamic modeling of tree harvesting and growth, temporary carbon storage, end-of-life (EOL) strategies, material substitution, and characterization factors in a consequential life cycle assessment (LCA). This combination highlights the extent to which material substitution, EOL strategies, and carbon sequestration can be decisive. In addition, it addresses the static and dynamic measurements of radiative forcing (W.m−2) and the carbon dioxide (CO2) equivalent (CO2eq.). In this case study, material substitution contributed the most to result, followed by post-harvest CO2 sequestration. In terms of metrics, the conventional static LCA overestimates the long-term cumulative impact on CC (tonne CO2eq.) without providing information on the short-term impact of the case study. In addition, the assessment of such a dynamic consequential life cycle inventory (LCI) with a dynamic metric provides more specific information, regardless of the temporal boundary. However, the absolute dynamic metrics (W.m−2) should support the relative dynamic metric (tonne CO2eq.1st year) to avoid misleading conclusions.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n On the application limits and performance of the single-mode spectral analysis for seismic analysis of isolated bridges in Canada.\n \n \n \n \n\n\n \n Nguyen, X. D.; and Guizani, L.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 49(11): 1747 - 1763. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"OnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224413043652 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {On the application limits and performance of the single-mode spectral analysis for seismic analysis of isolated bridges in Canada},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Nguyen, Xuan Dai and Guizani, Lotfi},\nvolume = {49},\nnumber = {11},\nyear = {2022},\npages = {1747 - 1763},\nissn = {03151468},\nabstract = {<div data-language="eng" data-ev-field="abstract">Single-mode spectral analysis (SMSA) is a simple procedure efficiently used to evaluate the seismic demands of base-isolated bridges, particularly suitable for the design of simple bridges or preliminary design of complex bridges. However, bridge design codes, notably the Canadian code CSA-S6:19 (CSA-S6 2019), specify many limitations on the use of the method for final design. This paper evaluates the performance of SMSA and the efficiency of its limits of application as specified in the current codes through the results of a parametric study. The hysteretic properties of seismic isolation systems and the stiffness of bridge substructures are varied. Seismic demands predicted by SMSA and nonlinear time-history analyses (NLTHAs) are then compared, both inside and outside the current specified limit range in CSA-S6:19 (CSA-S6 2019). Results show that the most effective application conditions are those related to the maximum equivalent viscous damping and minimum restoring force. The upper limits of the effective period and the post-elastic period can be ignored. Further, to complement SMSA, a relation is proposed to estimate the expected residual displacement as a function of the restoring force at the design displacement. Regression relations allowing estimating the expected mean and confidence interval of the relative displacement deviation predicted by SMSA from that based on NLTHA are also proposed.<br/></div> © 2022 The Author(s).},\nkey = {Spectrum analysis},\n%keywords = {Bridges;Seismic design;Seismology;Stiffness;},\n%note = {Equivalent linear model;Expected error;Nonlinear time history analysis;Residual displacement;Restoring forces;Seismic base isolation;Seismic demands;Simple++;Single mode;Single-mode spectral analyse;},\nURL = {http://dx.doi.org/10.1139/cjce-2020-0749},\n} \n\n\n
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Single-mode spectral analysis (SMSA) is a simple procedure efficiently used to evaluate the seismic demands of base-isolated bridges, particularly suitable for the design of simple bridges or preliminary design of complex bridges. However, bridge design codes, notably the Canadian code CSA-S6:19 (CSA-S6 2019), specify many limitations on the use of the method for final design. This paper evaluates the performance of SMSA and the efficiency of its limits of application as specified in the current codes through the results of a parametric study. The hysteretic properties of seismic isolation systems and the stiffness of bridge substructures are varied. Seismic demands predicted by SMSA and nonlinear time-history analyses (NLTHAs) are then compared, both inside and outside the current specified limit range in CSA-S6:19 (CSA-S6 2019). Results show that the most effective application conditions are those related to the maximum equivalent viscous damping and minimum restoring force. The upper limits of the effective period and the post-elastic period can be ignored. Further, to complement SMSA, a relation is proposed to estimate the expected residual displacement as a function of the restoring force at the design displacement. Regression relations allowing estimating the expected mean and confidence interval of the relative displacement deviation predicted by SMSA from that based on NLTHA are also proposed.
© 2022 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Experimental Investigation of the Wind Loading on Solar Panels: Effects of Clearance off Flat Roofs.\n \n \n \n \n\n\n \n Alrawashdeh, H.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 148(12). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224212971028 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental Investigation of the Wind Loading on Solar Panels: Effects of Clearance off Flat Roofs},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Alrawashdeh, Hatem and Stathopoulos, Ted},\nvolume = {148},\nnumber = {12},\nyear = {2022},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">The paper presents the results of a comprehensive wind tunnel study dedicated to addressing the effects of the underneath array clearance on wind loading of roof-mounted solar panels. Indeed, the array clearance has a crucial influence in many respects ranging from its consideration in the wind tunnel modeling to its impact on structural safety. A set of atmospheric wind tunnel experiments was carried out on three configurations of a multipanel solar array mounted on a flat roof immersed in a simulated atmospheric flow of open-country exposure. The solar array was placed at three clearance heights above the roof, namely, 0, 20, and 40 cm (in full scale). Wind tunnel measurements of the mean and peak pressures on both bottom and top surfaces of the solar panels as well as of net pressures across the panels were carried out. The results show that the impact of the underneath array clearance on the panel wind-induced pressures depends highly on the wind direction and the location of the panel within the array. Generally, the wind-induced pressures on solar panels when lowering the array clearance become quite severe and may peel off the panels from the supporting racking system; on the other hand, at such clearance installation, the panels are subjected to lower downward net pressure. Furthermore, the study highlights the potential uncertainties in the wind tunnel experimental results that could be deemed as actual design loadings when the underneath clearance is of concern. This has important ramifications on the formulation of design provisions to be used by solar panel professionals.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Wind tunnels},\n%keywords = {Roofs;Solar concentrators;Solar panels;},\n%note = {Air clearance;Codes and standards;Experimental investigations;Flat roofs;Net pressure;Solar arrays;Solar panels;Wind loading;Wind pressures;Wind tunnel models;},\nURL = {http://dx.doi.org/10.1061/JSENDH/STENG-10957},\n} \n\n\n
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The paper presents the results of a comprehensive wind tunnel study dedicated to addressing the effects of the underneath array clearance on wind loading of roof-mounted solar panels. Indeed, the array clearance has a crucial influence in many respects ranging from its consideration in the wind tunnel modeling to its impact on structural safety. A set of atmospheric wind tunnel experiments was carried out on three configurations of a multipanel solar array mounted on a flat roof immersed in a simulated atmospheric flow of open-country exposure. The solar array was placed at three clearance heights above the roof, namely, 0, 20, and 40 cm (in full scale). Wind tunnel measurements of the mean and peak pressures on both bottom and top surfaces of the solar panels as well as of net pressures across the panels were carried out. The results show that the impact of the underneath array clearance on the panel wind-induced pressures depends highly on the wind direction and the location of the panel within the array. Generally, the wind-induced pressures on solar panels when lowering the array clearance become quite severe and may peel off the panels from the supporting racking system; on the other hand, at such clearance installation, the panels are subjected to lower downward net pressure. Furthermore, the study highlights the potential uncertainties in the wind tunnel experimental results that could be deemed as actual design loadings when the underneath clearance is of concern. This has important ramifications on the formulation of design provisions to be used by solar panel professionals.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Is crushed concrete carbonation significant enough to be considered as a carbon mitigation strategy?.\n \n \n \n \n\n\n \n Ruschi Mendes Saade, M.; Yahia, A.; and Amor, B.\n\n\n \n\n\n\n Environmental Research Letters, 17(10). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"IsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224312991455 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Is crushed concrete carbonation significant enough to be considered as a carbon mitigation strategy?},\njournal = {Environmental Research Letters},\nauthor = {Ruschi Mendes Saade, Marcella and Yahia, Ammar and Amor, Ben},\nvolume = {17},\nnumber = {10},\nyear = {2022},\nissn = {17489318},\nabstract = {<div data-language="eng" data-ev-field="abstract">When addressing concrete carbonation as a carbon mitigation option, studies leave out the effect that a temporal difference between the CO<inf>2</inf> emissions and uptake happening throughout concrete’s life cycle have on climate change. In this study, the role played by carbonation on concrete’s carbon mitigation potential is investigated through a dynamic life cycle assessment, to properly position CO<inf>2</inf> uptake and release. The carbon balance in concrete structures built and demolished from 2018 to 2050 is modelled as a case study. The potential uptake due to crushed concrete carbonation is over 9% of the cumulative global warming effect of concrete manufacturing. It is comparable to the reduction potential of the most promising strategy, namely replacing clinker, totaling 12%. If stimulated in a wide scale, crushed concrete carbonation can push the industry towards meeting carbon mitigation targets faster. Future environmental impact assessments should rely on dynamic models to increasingly consider this phenomenon.<br/></div> © 2022 The Author(s). Published by IOP Publishing Ltd.},\nkey = {Life cycle},\n%keywords = {Carbon;Carbon dioxide;Carbonation;Concretes;Environmental impact;Global warming;},\n%note = {A-carbon;Carbon mitigation;CO 2 emission;CO 2 uptake;Concrete carbonation;Crushed concretes;Dynamic LCA;Mitigation options;Mitigation strategy;Temporal differences;},\nURL = {http://dx.doi.org/10.1088/1748-9326/ac9490},\n} \n\n\n
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When addressing concrete carbonation as a carbon mitigation option, studies leave out the effect that a temporal difference between the CO2 emissions and uptake happening throughout concrete’s life cycle have on climate change. In this study, the role played by carbonation on concrete’s carbon mitigation potential is investigated through a dynamic life cycle assessment, to properly position CO2 uptake and release. The carbon balance in concrete structures built and demolished from 2018 to 2050 is modelled as a case study. The potential uptake due to crushed concrete carbonation is over 9% of the cumulative global warming effect of concrete manufacturing. It is comparable to the reduction potential of the most promising strategy, namely replacing clinker, totaling 12%. If stimulated in a wide scale, crushed concrete carbonation can push the industry towards meeting carbon mitigation targets faster. Future environmental impact assessments should rely on dynamic models to increasingly consider this phenomenon.
© 2022 The Author(s). Published by IOP Publishing Ltd.\n
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\n \n\n \n \n \n \n \n \n Hourly wind data for aeolian vibration analysis of overhead transmission line conductors.\n \n \n \n \n\n\n \n Yang, S.; Chouinard, L. E.; and Langlois, S.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 230. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"HourlyPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224012835818 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Hourly wind data for aeolian vibration analysis of overhead transmission line conductors},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Yang, Shaoqi and Chouinard, Luc E. and Langlois, Sebastien},\nvolume = {230},\nyear = {2022},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">Fretting fatigue of conductors due to aeolian vibrations is an important phenomenon for the design and maintenance of electric transmission networks. The evaluation of exposure and susceptibility of a given span to aeolian vibrations requires information on the distribution of hourly wind speed and direction. Interpolation has been used to obtain wind data at non-instrumented locations; however, their accuracy is not adequate at locations far from stations and at locations in mountainous regions. Numerical Weather Prediction data sets provide wind information on a regular grid covering equally all regions; however, the spatial resolution is not adequate. A procedure is proposed using a mass-conserving diagnostic model (WindNinja) that incorporates a detailed map of local topography to improve predictions of wind direction. A second correction is proposed to account for local surface roughness as a function of wind direction and average canopy height from high-resolution LiDAR data. The proposed procedure is applied to nine meteorological stations and two experiment sites over southern Quebec, Canada. WindNinja was found to provide good estimates for the effects of local topography in mountainous regions. Wind speed after correction provides good agreement with hourly observations as well as with Weibull distributions fitted to the actual observations.<br/></div> © 2022 Elsevier Ltd},\nkey = {Topography},\n%keywords = {Electric lines;Location;Surface roughness;Vibration analysis;Weather forecasting;Weibull distribution;Wind speed;},\n%note = {Aeolian vibration;Canopy heights;ERA5;Local topography;Mountainous regions;Wind data;Wind directions;Windninja;Windrose;Windrose estimation;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2022.105184},\n} \n\n\n
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Fretting fatigue of conductors due to aeolian vibrations is an important phenomenon for the design and maintenance of electric transmission networks. The evaluation of exposure and susceptibility of a given span to aeolian vibrations requires information on the distribution of hourly wind speed and direction. Interpolation has been used to obtain wind data at non-instrumented locations; however, their accuracy is not adequate at locations far from stations and at locations in mountainous regions. Numerical Weather Prediction data sets provide wind information on a regular grid covering equally all regions; however, the spatial resolution is not adequate. A procedure is proposed using a mass-conserving diagnostic model (WindNinja) that incorporates a detailed map of local topography to improve predictions of wind direction. A second correction is proposed to account for local surface roughness as a function of wind direction and average canopy height from high-resolution LiDAR data. The proposed procedure is applied to nine meteorological stations and two experiment sites over southern Quebec, Canada. WindNinja was found to provide good estimates for the effects of local topography in mountainous regions. Wind speed after correction provides good agreement with hourly observations as well as with Weibull distributions fitted to the actual observations.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Experimental study on yielding behavior of joints of I-steel with corrugated webs.\n \n \n \n \n\n\n \n Wang, J.; Xu, X.; Wu, L.; and Xie, Y.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 198. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223912811789 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental study on yielding behavior of joints of I-steel with corrugated webs},\njournal = {Journal of Constructional Steel Research},\nauthor = {Wang, Jun and Xu, Xiang and Wu, Lili and Xie, Yazhou},\nvolume = {198},\nyear = {2022},\nissn = {0143974X},\nabstract = {<div data-language="eng" data-ev-field="abstract">It is essential to provide reliable and stable support for soft rock roadways; hence, two novel kinds of yieldable joints designed by I-steel with corrugated webs (high-strength boltr and sleeve wedge joints) are proposed in this paper. Axial compression tests were carried out against two high-strength bolted joints and one sleeve wedge joint, while three high-strength bolted joints with different eccentric distances (0.1 m, 0.2 m, and 0.3 m) were conducted in eccentric loading tests to investigate their loading behavior. The joint friction, shear bearing capacity of high-strength bolts, and the strain distribution of flanges and cover plates of yieldable joints under different stress states were obtained from experimental testing. It indicated that: 1) Before bolts slid, the displacement at both ends of the specimen did not increase significantly, and the joint could resist a large load; 2) When the external load exceeded the friction that the bolt could bear, the bolt started to slide; 3) The load applied on the specimen increased rapidly when the bolts slid to the end of the bolt holes; 4) When the bolt slid, the compressive strain of the cover plate could be released; 5) The inclination angle of the joint under eccentric compression was mainly caused by bolt sliding, which was directly related to the bolts sliding distance. It was proved that the proposed yieldable joints could not only adapt to large deformation imposed by the surrounding soft rock but also provide enough load-bearing capacity to sustain fast pressure, thereby showing great applicability for underground structures. Furthermore, this study proposed a design procedure and improved configurations of yieldable joints suitable for both small and large contractions in soft rock roadways.<br/></div> © 2022 Elsevier Ltd},\nkey = {Bolts},\n%keywords = {Bearing capacity;Bolted joints;Compression testing;Friction;High strength steel;Loads (forces);Plates (structural components);Rocks;Underground structures;},\n%note = {Axial and eccentric loading test;Axial loading;Corrugated web;Eccentric loading;High Strength Bolted Joints;I-shaped steel with corrugated web;Loading tests;Sleeve wedge joint;Soft rock roadway;Yieldable joint;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2022.107570},\n} \n\n\n
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It is essential to provide reliable and stable support for soft rock roadways; hence, two novel kinds of yieldable joints designed by I-steel with corrugated webs (high-strength boltr and sleeve wedge joints) are proposed in this paper. Axial compression tests were carried out against two high-strength bolted joints and one sleeve wedge joint, while three high-strength bolted joints with different eccentric distances (0.1 m, 0.2 m, and 0.3 m) were conducted in eccentric loading tests to investigate their loading behavior. The joint friction, shear bearing capacity of high-strength bolts, and the strain distribution of flanges and cover plates of yieldable joints under different stress states were obtained from experimental testing. It indicated that: 1) Before bolts slid, the displacement at both ends of the specimen did not increase significantly, and the joint could resist a large load; 2) When the external load exceeded the friction that the bolt could bear, the bolt started to slide; 3) The load applied on the specimen increased rapidly when the bolts slid to the end of the bolt holes; 4) When the bolt slid, the compressive strain of the cover plate could be released; 5) The inclination angle of the joint under eccentric compression was mainly caused by bolt sliding, which was directly related to the bolts sliding distance. It was proved that the proposed yieldable joints could not only adapt to large deformation imposed by the surrounding soft rock but also provide enough load-bearing capacity to sustain fast pressure, thereby showing great applicability for underground structures. Furthermore, this study proposed a design procedure and improved configurations of yieldable joints suitable for both small and large contractions in soft rock roadways.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Seismic response analysis of reinforced masonry core walls with boundary elements.\n \n \n \n \n\n\n \n Mahrous, A.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 270. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223712735491 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic response analysis of reinforced masonry core walls with boundary elements},\njournal = {Engineering Structures},\nauthor = {Mahrous, Amgad and AbdelRahman, Belal and Galal, Khaled},\nvolume = {270},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">The seismic design of mid- and high-rise reinforced masonry (RM) structures necessitates a reliable seismic force resisting system (SFRS) that provides adequate capacity and ductility. Core walls are commonly used as the SFRS for counterpart reinforced concrete buildings due to the convenience of locating the elevators and staircases inside it. This study introduces reinforced masonry core walls with boundary elements (RMCW+BEs) as a potential SFRS alternative to rectangular reinforced masonry shear walls (RMSWs) with and without boundary elements given their enhanced structural and architectural characteristics in typical RM buildings. A macroscale nonlinear numerical model was developed using the Extreme Loading for Structures software (ELS) to evaluate the seismic performance of RMCW+BEs. A nonlinear time history analysis (NLTHA) was carried out for three archetype RM buildings with 10-, 15-, and 20-story heights designed according to the CSA S304-14 and located in a North American moderate seismic zone. The results showed that utilizing RMCW+BEs as the main SFRS system adequately controlled the seismic demands on RM buildings subjected to typical North American ground motions. However, the 20-story building showed a shear demand exceeding the nominal flexural resistance of the core wall at the plastic hinge region at the base, which was attributed to the adverse effect of the higher modes of vibration effects on the seismic demand parameters. Therefore, the three buildings were redesigned using a dual plastic hinge (DPH) design approach. The numerical results demonstrated that using the DPH reduced the shear demand and mitigated the effect of the higher modes of vibration on the seismic response of the core walls. The findings of this study highlight the need to integrate a new shear demand magnification factor to account for the higher mode effects in estimating the seismic demand of ductile RMSWs in the next generation of the North American design standards for masonry structures.<br/></div> © 2022 Elsevier Ltd},\nkey = {Seismic response},\n%keywords = {Architectural design;Boundary element method;Concrete buildings;Nonlinear analysis;Reinforced concrete;Seismic design;Shear flow;Shear walls;},\n%note = {Applied element method;Boundary elements;Confinement;Core wall;Dual plastic hinge;Element method;Higher mode;Plastic hinges;Reinforced masonry;Seismic forces;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.114882},\n} \n\n\n
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The seismic design of mid- and high-rise reinforced masonry (RM) structures necessitates a reliable seismic force resisting system (SFRS) that provides adequate capacity and ductility. Core walls are commonly used as the SFRS for counterpart reinforced concrete buildings due to the convenience of locating the elevators and staircases inside it. This study introduces reinforced masonry core walls with boundary elements (RMCW+BEs) as a potential SFRS alternative to rectangular reinforced masonry shear walls (RMSWs) with and without boundary elements given their enhanced structural and architectural characteristics in typical RM buildings. A macroscale nonlinear numerical model was developed using the Extreme Loading for Structures software (ELS) to evaluate the seismic performance of RMCW+BEs. A nonlinear time history analysis (NLTHA) was carried out for three archetype RM buildings with 10-, 15-, and 20-story heights designed according to the CSA S304-14 and located in a North American moderate seismic zone. The results showed that utilizing RMCW+BEs as the main SFRS system adequately controlled the seismic demands on RM buildings subjected to typical North American ground motions. However, the 20-story building showed a shear demand exceeding the nominal flexural resistance of the core wall at the plastic hinge region at the base, which was attributed to the adverse effect of the higher modes of vibration effects on the seismic demand parameters. Therefore, the three buildings were redesigned using a dual plastic hinge (DPH) design approach. The numerical results demonstrated that using the DPH reduced the shear demand and mitigated the effect of the higher modes of vibration on the seismic response of the core walls. The findings of this study highlight the need to integrate a new shear demand magnification factor to account for the higher mode effects in estimating the seismic demand of ductile RMSWs in the next generation of the North American design standards for masonry structures.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Determination of aerodynamic derivative for one degree of freedom square cylinder using large eddy simulation.\n \n \n \n \n\n\n \n Gobran, Y.; McClure, G.; and Aboshosha, H.\n\n\n \n\n\n\n Results in Engineering, 16. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"DeterminationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223712705109 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Determination of aerodynamic derivative for one degree of freedom square cylinder using large eddy simulation},\njournal = {Results in Engineering},\nauthor = {Gobran, Yomna and McClure, Ghyslaine and Aboshosha, Haitham},\nvolume = {16},\nyear = {2022},\nissn = {25901230},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study investigates the applicability of using Computational Fluid Dynamics (i.e., CFD) simulations to evaluate the aerodynamic derivatives (i.e., AD) and Wind Structure Interaction (i.e., WSI) response of free vibrating bluff bodies. The study majorly focuses on three-dimensional simulations of a rigid cylinder with a square cross-section that is elastically supported and constrained to move only in the transverse direction under wind loading. Primarily, to validate the method, the square cylinder was kept stationary, and the force coefficients were calculated at different wind angles of attack. Following that, to determine the AD, the free vibrations method or more precisely named the impulse response [1,2] was used, where the rigid square cylinder was first pushed a fixed distance and then left to freely vibrate. The model was assigned a definite mass and damping ratio, while supported on springs with discrete stiffness in the transverse direction. Finally, the amplitude of vibration was determined through a MATLAB code employing the Newmark Beta Method. This approach was widely applied in the literature for streamlined bodies and, up to the knowledge of the authors, was not validated for the sharp-edged bluff bodies. Eventually, it was concluded that the approach used is valid and could be used in the future to estimate the flutter derivatives as well as the amplitude of vibrations for square cross-section bodies.<br/></div> © 2022},\nkey = {Angle of attack},\n%keywords = {Computational fluid dynamics;Cylinders (shapes);Degrees of freedom (mechanics);Impulse response;Large eddy simulation;MATLAB;},\n%note = {Aerodynamic derivatives;Bluff body;CFD simulations;Large-eddy simulations;Rigid cylinder;Square cross section;Square cylinders;Three dimensional simulations;Wind loading;Wind-structure interaction;},\nURL = {http://dx.doi.org/10.1016/j.rineng.2022.100620},\n} \n\n\n
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This study investigates the applicability of using Computational Fluid Dynamics (i.e., CFD) simulations to evaluate the aerodynamic derivatives (i.e., AD) and Wind Structure Interaction (i.e., WSI) response of free vibrating bluff bodies. The study majorly focuses on three-dimensional simulations of a rigid cylinder with a square cross-section that is elastically supported and constrained to move only in the transverse direction under wind loading. Primarily, to validate the method, the square cylinder was kept stationary, and the force coefficients were calculated at different wind angles of attack. Following that, to determine the AD, the free vibrations method or more precisely named the impulse response [1,2] was used, where the rigid square cylinder was first pushed a fixed distance and then left to freely vibrate. The model was assigned a definite mass and damping ratio, while supported on springs with discrete stiffness in the transverse direction. Finally, the amplitude of vibration was determined through a MATLAB code employing the Newmark Beta Method. This approach was widely applied in the literature for streamlined bodies and, up to the knowledge of the authors, was not validated for the sharp-edged bluff bodies. Eventually, it was concluded that the approach used is valid and could be used in the future to estimate the flutter derivatives as well as the amplitude of vibrations for square cross-section bodies.
© 2022\n
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\n \n\n \n \n \n \n \n \n Large-Scale Wind Testing on Roof Overhangs for a Low-Rise Building.\n \n \n \n \n\n\n \n Mostafa, K.; Zisis, I.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 148(11). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"Large-ScalePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223612689106 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Large-Scale Wind Testing on Roof Overhangs for a Low-Rise Building},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Mostafa, Karim and Zisis, Ioannis and Stathopoulos, Ted},\nvolume = {148},\nnumber = {11},\nyear = {2022},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">Roof overhangs are prone to wind damage because they are subject to wind load at both the upper and bottom surfaces. Wind standards assume that the pressure at the bottom covering of a roof overhang will be the same as the external pressure coefficient on the adjacent wall surface. A large-scale experimental campaign was carried out at the Wall of Wind (WOW) Research Experimental Facility to investigate the validity and possible limitations of such assumptions. The experimental setup considered two 1:10 scaled models [0.61 m (2 ft) and 1.83 m (6 ft) inclined overhangs with a soffit] of a low-rise hip roof building with roof slope 4:12, eave height of 7.5 m (24 ft), and horizontal dimensions of 12.2 m (40 ft)× 15.24 m (50 ft). The two models were tested for open terrain for 40 wind directions (WDs). The study provided information on pressure variations at the top and bottom surfaces of overhangs, adjacent roof areas, and underneath walls. Pressure and correlation coefficients were generated between soffits and underneath walls to quantify the effect of overhang width. The research showed that the 0.61 m (2 ft) overhang experienced higher suction coefficients at the edges compared to the 1.83 m (6 ft) overhang. In addition, the results confirmed that, for both configurations, soffit positive pressure coefficients may be assumed to be equal to the adjacent wall external pressure, as stated by a common standard, while this might not be applicable for negative pressure coefficients. Correlation and regression analyses between soffit pressure taps and wall upper taps show that the 1.83 m (6 ft) soffit appeared to be less correlated with the wall upper taps, compared to the 0.61 m (2 ft) soffit. Finally, area-averaged pressure coefficients for overhangs and adjacent roof areas were compared to the provisions in one standard for each specified zone, and differences were found.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Wind tunnels},\n%keywords = {Aerodynamic loads;Regression analysis;Roofs;Walls (structural partitions);Wind stress;},\n%note = {Bottom surfaces;Code of practice;Large-scales;Low-rise buildings;Pressure coefficients;Roof overhang;Roof soffit;Standards and codes;Wind load;Wind standard and code of practice;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0003477},\n} \n\n\n
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Roof overhangs are prone to wind damage because they are subject to wind load at both the upper and bottom surfaces. Wind standards assume that the pressure at the bottom covering of a roof overhang will be the same as the external pressure coefficient on the adjacent wall surface. A large-scale experimental campaign was carried out at the Wall of Wind (WOW) Research Experimental Facility to investigate the validity and possible limitations of such assumptions. The experimental setup considered two 1:10 scaled models [0.61 m (2 ft) and 1.83 m (6 ft) inclined overhangs with a soffit] of a low-rise hip roof building with roof slope 4:12, eave height of 7.5 m (24 ft), and horizontal dimensions of 12.2 m (40 ft)× 15.24 m (50 ft). The two models were tested for open terrain for 40 wind directions (WDs). The study provided information on pressure variations at the top and bottom surfaces of overhangs, adjacent roof areas, and underneath walls. Pressure and correlation coefficients were generated between soffits and underneath walls to quantify the effect of overhang width. The research showed that the 0.61 m (2 ft) overhang experienced higher suction coefficients at the edges compared to the 1.83 m (6 ft) overhang. In addition, the results confirmed that, for both configurations, soffit positive pressure coefficients may be assumed to be equal to the adjacent wall external pressure, as stated by a common standard, while this might not be applicable for negative pressure coefficients. Correlation and regression analyses between soffit pressure taps and wall upper taps show that the 1.83 m (6 ft) soffit appeared to be less correlated with the wall upper taps, compared to the 0.61 m (2 ft) soffit. Finally, area-averaged pressure coefficients for overhangs and adjacent roof areas were compared to the provisions in one standard for each specified zone, and differences were found.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Analytical study and design approach of the axial and flexural response of reinforced masonry columns confined with FRP jackets.\n \n \n \n \n\n\n \n Alotaibi, K. S.; AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 269. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"AnalyticalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223512629493 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Analytical study and design approach of the axial and flexural response of reinforced masonry columns confined with FRP jackets},\njournal = {Engineering Structures},\nauthor = {Alotaibi, Khalid Saqer and AbdelRahman, Belal and Galal, Khaled},\nvolume = {269},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Using fiber-reinforced polymer (FRP) wraps has proven to be an effective and optimized confinement technique to upgrade the axial and flexural capacity of reinforced concrete (RC) and reinforced masonry (RM) columns. The axial capacity of FRP-confined masonry depends on both the compressive strength of masonry before strengthening and the confinement pressure provided by the FRP jacket. This study proposes a simplified methodology to design and analyze prismatic fully grouted reinforced masonry columns (RMCs) strengthened with FRP Jackets. The proposed design methodology included an analytical confinement model to predict the compressive strength gain in RMCs due to the effective confinement pressure provided by FRP jackets. The proposed procedure was also designed to predict the nominal capacity of RMCs for practical design applications, with columns subjected to both axial loading and bending moment. The essential parameters to perform detailed section analysis were established, and suggested expressions were proposed to obtain the parameter values. Practical values for the equivalent rectangular stress block parameters were proposed. The theoretical axial force-moment interaction diagrams obtained by the proposed procedure were compared with available experimental data. The experimental test results were in good agreement with the analytical predictions by a reasonable marginal error. Furthermore, the effect of five design variables on the axial-flexural interaction of FRP-wrapped RMCs was investigated. The variables considered in the parametric study were the number of FRP layers, radius of the corners, stiffness of the FRP composite, cross-sectional aspect ratio, and masonry compressive strength. The results showed that increasing the FRP layers, corner radius, and FRP jacket stiffness significantly enhanced the axial capacity of the FRP-confined RMCs. However, the increase in the masonry compressive strength and cross-sectional aspect ratio negatively affected the axial capacity gain ratio of FRP-strengthened RMCs.<br/></div> © 2022 Elsevier Ltd},\nkey = {Compressive strength},\n%keywords = {Aspect ratio;Concrete construction;Design;Fiber reinforced plastics;Forecasting;Reinforced concrete;Stiffness;},\n%note = {Concrete masonry;Concrete masonry block;Confinement;Eccentric loading;Fiber-reinforced polymer;Fiber-reinforced polymers;Fibre reinforced polymers;Interaction diagram;Masonry Blocks;Masonry columns;Reinforced masonry;Reinforced masonry column;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.114805},\n} \n\n\n
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Using fiber-reinforced polymer (FRP) wraps has proven to be an effective and optimized confinement technique to upgrade the axial and flexural capacity of reinforced concrete (RC) and reinforced masonry (RM) columns. The axial capacity of FRP-confined masonry depends on both the compressive strength of masonry before strengthening and the confinement pressure provided by the FRP jacket. This study proposes a simplified methodology to design and analyze prismatic fully grouted reinforced masonry columns (RMCs) strengthened with FRP Jackets. The proposed design methodology included an analytical confinement model to predict the compressive strength gain in RMCs due to the effective confinement pressure provided by FRP jackets. The proposed procedure was also designed to predict the nominal capacity of RMCs for practical design applications, with columns subjected to both axial loading and bending moment. The essential parameters to perform detailed section analysis were established, and suggested expressions were proposed to obtain the parameter values. Practical values for the equivalent rectangular stress block parameters were proposed. The theoretical axial force-moment interaction diagrams obtained by the proposed procedure were compared with available experimental data. The experimental test results were in good agreement with the analytical predictions by a reasonable marginal error. Furthermore, the effect of five design variables on the axial-flexural interaction of FRP-wrapped RMCs was investigated. The variables considered in the parametric study were the number of FRP layers, radius of the corners, stiffness of the FRP composite, cross-sectional aspect ratio, and masonry compressive strength. The results showed that increasing the FRP layers, corner radius, and FRP jacket stiffness significantly enhanced the axial capacity of the FRP-confined RMCs. However, the increase in the masonry compressive strength and cross-sectional aspect ratio negatively affected the axial capacity gain ratio of FRP-strengthened RMCs.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Application of CFRP Wrap for Reinforcing Undamaged Thin-Walled Pipe Bends under Thermal Expansion Loads.\n \n \n \n \n\n\n \n Davaripour, F.; Roy, K.; and Maghoul, P.\n\n\n \n\n\n\n Journal of Pipeline Systems Engineering and Practice, 13(4). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ApplicationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223312568798 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Application of CFRP Wrap for Reinforcing Undamaged Thin-Walled Pipe Bends under Thermal Expansion Loads},\njournal = {Journal of Pipeline Systems Engineering and Practice},\nauthor = {Davaripour, Farhad and Roy, Kshama and Maghoul, Pooneh},\nvolume = {13},\nnumber = {4},\nyear = {2022},\nissn = {19491190},\nabstract = {<div data-language="eng" data-ev-field="abstract">Thermal stress analysis is an integral part of the design and integrity assessment of buried pipelines. Pipe bends can be subjected to significant cross-sectional deformations due to bending moments induced by thermal cycles, compared to straight pipes, and therefore are the most crucial component of the pipeline's structural integrity. Fatigue fracture, which is the primary failure mode in pipelines under the thermal cycle, may occur at the crown region of the pipe bend in the form of a longitudinal crack. This specific failure pattern is primarily the result of excessive circumferential stress that may develop in the crown region of a pipe bend. The present paper suggests a novel approach to reduce the stress range at the crown region of pipe bends using carbon fiber-reinforced polymer (CFRP) wraps. This approach has been used in the pipeline industry to reinforce and repair corroded pipes. However, a very limited study on the use of CFRP wrap to enhance the mechanical behavior of undamaged pipe bends is available in the literature. This study employs an advanced finite element (FE) method to investigate the performance of buried pipe bends reinforced with CFRP composite wraps and subjected to thermal expansion-induced bending moment. A combined beam and shell-based FE model has been used in this study to ensure reasonable accuracy and remarkable computational efficiency for engineering practice. The FE results show that a 6 mm CFRP wrap around the pipe bend can decrease the von-Mises stress imposed by thermal expansion by up to 27.4%. In short, reinforcing pipe bends with CFRP wrap has a strong potential to decrease the stress range imposed in the pipe bend under thermal expansion-induced moments and consequently prevent fatigue failure in pipe bends.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Thin walled structures},\n%keywords = {Bending moments;Carbon fiber reinforced plastics;Computational efficiency;Fatigue of materials;Pipeline corrosion;Stress analysis;Thermal cycling;Thermal expansion;Water pipelines;},\n%note = {Buried pipelines;Carbon fiber reinforced polymer wraps;Design assessments;Integral part;Integrity assessment;Pipe bend;Stress range;Thermal;Thermal stress analysis;Thin-walled;},\nURL = {http://dx.doi.org/10.1061/(ASCE)PS.1949-1204.0000677},\n} \n\n\n
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Thermal stress analysis is an integral part of the design and integrity assessment of buried pipelines. Pipe bends can be subjected to significant cross-sectional deformations due to bending moments induced by thermal cycles, compared to straight pipes, and therefore are the most crucial component of the pipeline's structural integrity. Fatigue fracture, which is the primary failure mode in pipelines under the thermal cycle, may occur at the crown region of the pipe bend in the form of a longitudinal crack. This specific failure pattern is primarily the result of excessive circumferential stress that may develop in the crown region of a pipe bend. The present paper suggests a novel approach to reduce the stress range at the crown region of pipe bends using carbon fiber-reinforced polymer (CFRP) wraps. This approach has been used in the pipeline industry to reinforce and repair corroded pipes. However, a very limited study on the use of CFRP wrap to enhance the mechanical behavior of undamaged pipe bends is available in the literature. This study employs an advanced finite element (FE) method to investigate the performance of buried pipe bends reinforced with CFRP composite wraps and subjected to thermal expansion-induced bending moment. A combined beam and shell-based FE model has been used in this study to ensure reasonable accuracy and remarkable computational efficiency for engineering practice. The FE results show that a 6 mm CFRP wrap around the pipe bend can decrease the von-Mises stress imposed by thermal expansion by up to 27.4%. In short, reinforcing pipe bends with CFRP wrap has a strong potential to decrease the stress range imposed in the pipe bend under thermal expansion-induced moments and consequently prevent fatigue failure in pipe bends.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Three-dimensional failure envelope of concrete dam shear keys.\n \n \n \n \n\n\n \n Freitas, M.; Ben Ftima, M.; Leger, P.; and Bouaanani, N.\n\n\n \n\n\n\n Engineering Structures, 269. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"Three-dimensionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223412596357 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Three-dimensional failure envelope of concrete dam shear keys},\njournal = {Engineering Structures},\nauthor = {Freitas, Mario and Ben Ftima, Mahdi and Leger, Pierre and Bouaanani, Najib},\nvolume = {269},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Shear keys provide interlocking mechanisms along the vertical contraction joints of many concrete gravity dams. The shear key ultimate shear capacity is typically estimated as a function of the friction and cohesion that could be mobilised across a 2D shear plane located at the base of the key when subjected to a normal confinement pressure, P. A two-dimensional response of dam monoliths and shear keys shearing-off at their bases, is assumed. However, evidence of 3D interlocking behaviour between dam monoliths and the possibility of different key failure mechanisms involving interacting axial, P, shear, V, moment, M, and torsion, T, indicates that typical empirical formulations could significantly overestimate the actual shear key capacity under floods and seismic loadings. This paper presents an evaluation of the load–displacement response of shear keys subjected to multiaxial loading via nonlinear finite element analyses. A concrete "Continuous Surface Cap Model" (CSCM), available in the computer program LS-Dyna, is first shown to best capture the experimental shear keys' ultimate and residual shear capacity responses among five constitutive models. The effects of the tensile strength, fracture energy, confinement pressure, friction coefficient, initial opening, and dilation conditions on the load–displacement response of keys are investigated. Failure envelopes considering the key multiaxial shear capacity with confinement pressure, P, moment, M, and torsion, T, are developed. The ratios between moment and shear, M/V, and torsion and shear, T/V, control the failure mechanism. Increasing these ratios significantly reduce the ultimate shear capacity.<br/></div> © 2022 Elsevier Ltd},\nkey = {Torsional stress},\n%keywords = {Concrete dams;Concretes;Failure (mechanical);Finite element method;Friction;Gravity dams;Tensile strength;},\n%note = {Concrete gravity dams;F.E. analysis;Failure envelope;Failure mechanism;FE analysis;Load-displacement response;Multi-axial loadings;Nonlinear FE analyse;Shear key;Ultimate shear capacities;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.114766},\n} \n\n\n
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Shear keys provide interlocking mechanisms along the vertical contraction joints of many concrete gravity dams. The shear key ultimate shear capacity is typically estimated as a function of the friction and cohesion that could be mobilised across a 2D shear plane located at the base of the key when subjected to a normal confinement pressure, P. A two-dimensional response of dam monoliths and shear keys shearing-off at their bases, is assumed. However, evidence of 3D interlocking behaviour between dam monoliths and the possibility of different key failure mechanisms involving interacting axial, P, shear, V, moment, M, and torsion, T, indicates that typical empirical formulations could significantly overestimate the actual shear key capacity under floods and seismic loadings. This paper presents an evaluation of the load–displacement response of shear keys subjected to multiaxial loading via nonlinear finite element analyses. A concrete \"Continuous Surface Cap Model\" (CSCM), available in the computer program LS-Dyna, is first shown to best capture the experimental shear keys' ultimate and residual shear capacity responses among five constitutive models. The effects of the tensile strength, fracture energy, confinement pressure, friction coefficient, initial opening, and dilation conditions on the load–displacement response of keys are investigated. Failure envelopes considering the key multiaxial shear capacity with confinement pressure, P, moment, M, and torsion, T, are developed. The ratios between moment and shear, M/V, and torsion and shear, T/V, control the failure mechanism. Increasing these ratios significantly reduce the ultimate shear capacity.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Flexural and Serviceability Behavior of Concrete Beams Reinforced with Ribbed GFRP Bars.\n \n \n \n \n\n\n \n Gouda, O.; Asadian, A.; and Galal, K.\n\n\n \n\n\n\n Journal of Composites for Construction, 26(5). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"FlexuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223412586857 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Flexural and Serviceability Behavior of Concrete Beams Reinforced with Ribbed GFRP Bars},\njournal = {Journal of Composites for Construction},\nauthor = {Gouda, Omar and Asadian, Alireza and Galal, Khaled},\nvolume = {26},\nnumber = {5},\nyear = {2022},\nissn = {10900268},\nabstract = {<div data-language="eng" data-ev-field="abstract">Glass fiber-reinforced polymer (GFRP) bars are used as internal reinforcement in many structural applications. The structural performance of GFRP-reinforced concrete elements is dependent on the physical and mechanical properties of GFRP reinforcement. There is a lack of experimental data on the flexural behavior of concrete beams reinforced with ribbed GFRP bars. This study evaluates the flexural strength and serviceability performance of concrete beams reinforced with ribbed GFRP bars. A total of 11 GFRP-reinforced concrete beams with dimensions of 4,350 × 400 × 200 mm (length × height × width) were constructed and tested under a four-point loading test setup. The main test parameters were the concrete cover, reinforcement ratio, bar spacing, and confinement due to the transverse reinforcement in the bending zone. The results uantify the effect of increasing the reinforcement ratio on the increase in the ultimate capacity and the reduction in deflection at the service and ultimate stages. In addition, the results showed that the increase in the confinement in the bending zone due to closely spaced stirrups resulted in a higher ductility index and ultimate capacity with no considerable effect on the postcracking stiffness of the beams. Moreover, based on the experimental results, the accuracy of deflection equations available in design codes and guidelines is evaluated and discussed.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Glass fibers},\n%keywords = {Concrete beams and girders;Fiber reinforced plastics;Reinforced concrete;Stiffness;},\n%note = {Concrete beam;Deflection;Flexural behavior;Glass-fiber reinforced polymer bars;Glassfiber reinforced polymers (GFRP);Polymer rebars;Reinforcement ratios;Ribbed glass fiber-reinforced polymer rebar;Structural applications;Ultimate capacity;},\nURL = {http://dx.doi.org/10.1061/(ASCE)CC.1943-5614.0001253},\n} \n\n\n
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Glass fiber-reinforced polymer (GFRP) bars are used as internal reinforcement in many structural applications. The structural performance of GFRP-reinforced concrete elements is dependent on the physical and mechanical properties of GFRP reinforcement. There is a lack of experimental data on the flexural behavior of concrete beams reinforced with ribbed GFRP bars. This study evaluates the flexural strength and serviceability performance of concrete beams reinforced with ribbed GFRP bars. A total of 11 GFRP-reinforced concrete beams with dimensions of 4,350 × 400 × 200 mm (length × height × width) were constructed and tested under a four-point loading test setup. The main test parameters were the concrete cover, reinforcement ratio, bar spacing, and confinement due to the transverse reinforcement in the bending zone. The results uantify the effect of increasing the reinforcement ratio on the increase in the ultimate capacity and the reduction in deflection at the service and ultimate stages. In addition, the results showed that the increase in the confinement in the bending zone due to closely spaced stirrups resulted in a higher ductility index and ultimate capacity with no considerable effect on the postcracking stiffness of the beams. Moreover, based on the experimental results, the accuracy of deflection equations available in design codes and guidelines is evaluated and discussed.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Dual layer metamodel-based safety assessment for rock wedge stability of a free-crested weir.\n \n \n \n \n\n\n \n Segura, R. L.; Frechette, V.; Miquel, B.; and Paultre, P.\n\n\n \n\n\n\n Engineering Structures, 268. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"DualPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223412596350 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Dual layer metamodel-based safety assessment for rock wedge stability of a free-crested weir},\njournal = {Engineering Structures},\nauthor = {Segura, Rocio L. and Frechette, Valerie and Miquel, Benjamin and Paultre, Patrick},\nvolume = {268},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">A key problem in gravity dams is providing sufficient stability to prevent sliding, and the difficulty increases with the number of weak structural planes in the dam foundation. Probabilistic methods allow different loading, material and geometric configurations to be considered, constituting the basis of more adequate design and assessment procedures. Metamodels drastically reduce the need for simulation runs, thereby decreasing the time and effort needed to simulate the structural response when analyzing a wide variety of dam-system scenarios. In this paper, a fragility-based safety assessment of a free-crested weir with respect to its rock foundation stability is performed using a dual-layer metamodel. The first layer emulates and replaces the continuous output of the software and allows the safety factor to be predicted, while the second layer provides the probability of not reaching this safety factor by generating parameterized multivariate fragility functions. To explicitly account for the effects of parameter uncertainties, multidimensional integration is implemented to update the fragility functions. Accordingly, recommendations can be formulated concerning the conditioning parameter's minimum values to achieve the expected performance when additional information regarding the remaining parameters is acquired. The results show that improving the knowledge of the loading (seismic and reservoir) parameters reduces the uncertainties in parameters such as cohesion to meet the safety factor requirements.<br/></div> © 2022 Elsevier Ltd},\nkey = {Weirs},\n%keywords = {Reservoirs (water);Safety factor;Stability;},\n%note = {Dam foundation;Dual-layers;Foundation stability;Fragility function;Free-crested weir;Meta model;Probabilistic analysis;Safety assessments;Weak structural plane;Wedge analyse;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.114691},\n} \n\n\n
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A key problem in gravity dams is providing sufficient stability to prevent sliding, and the difficulty increases with the number of weak structural planes in the dam foundation. Probabilistic methods allow different loading, material and geometric configurations to be considered, constituting the basis of more adequate design and assessment procedures. Metamodels drastically reduce the need for simulation runs, thereby decreasing the time and effort needed to simulate the structural response when analyzing a wide variety of dam-system scenarios. In this paper, a fragility-based safety assessment of a free-crested weir with respect to its rock foundation stability is performed using a dual-layer metamodel. The first layer emulates and replaces the continuous output of the software and allows the safety factor to be predicted, while the second layer provides the probability of not reaching this safety factor by generating parameterized multivariate fragility functions. To explicitly account for the effects of parameter uncertainties, multidimensional integration is implemented to update the fragility functions. Accordingly, recommendations can be formulated concerning the conditioning parameter's minimum values to achieve the expected performance when additional information regarding the remaining parameters is acquired. The results show that improving the knowledge of the loading (seismic and reservoir) parameters reduces the uncertainties in parameters such as cohesion to meet the safety factor requirements.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Effects of electrode size and configuration on sound transmission loss in piezo-laminated thick shell.\n \n \n \n \n\n\n \n Rabbani, V.; Wu, N.; and Maghoul, P.\n\n\n \n\n\n\n Wave Motion, 114. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"EffectsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223212551973 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effects of electrode size and configuration on sound transmission loss in piezo-laminated thick shell},\njournal = {Wave Motion},\nauthor = {Rabbani, V. and Wu, N. and Maghoul, P.},\nvolume = {114},\nyear = {2022},\nissn = {01652125},\nabstract = {<div data-language="eng" data-ev-field="abstract">Sound transmission loss (STL) occurs as waves propagate through a structure. In order to reduce the sound transmission through a cylinder with better STL, an acoustic quieting process needs to be implemented. One efficient ways to minimize sound transmission is using piezoelectric materials, which can be applied to reduce transmitted noise in different structures instead of damping approaches avoiding burdensome to fully dampen structural vibrations via passive methods. This study proposes a model using different sizes and configurations of piezoelectric electrode patches to increase the STL through thick-walled piezo-laminated cylindrical shells. The cylindrical shell is modeled using the three-dimensional theory of elasticity and piezoelasticity, and the Helmholtz equation is used for the wave propagation consideration inside the acoustic cavity as well as through the surrounding fluids. The STL is calculated using an exact integration of acoustic power over the outside surface of the shell. The analytical solution is compared with finite element numerical results to verify its validity. Parametric studies are conducted to investigate the effects of sizes and configurations of electrodes on STL. Results are presented with specific recommendations regarding the electrode size and configuration for active sound absorption. In addition, by proper choice of electrode size, one can avoid the resonance frequencies of the cylinder to provide higher sound transmission loss.<br/></div> © 2022 Elsevier B.V.},\nkey = {Electrodes},\n%keywords = {Acoustic fields;Acoustic wave propagation;Acoustic wave transmission;Architectural acoustics;Crystallography;Cylinders (shapes);Laminating;Piezoelectricity;Shells (structures);Sound insulating materials;Structural dynamics;},\n%note = {Acoustic Scattering;Acoustic transmission loss;Electrode configurations;Electrode size;Fluid and structure interactions;Linear piezoelectricity;Sound transmission;Sound transmission loss;Theory of linear piezoelectricity;Wave refraction;},\nURL = {http://dx.doi.org/10.1016/j.wavemoti.2022.103003},\n} \n\n\n
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Sound transmission loss (STL) occurs as waves propagate through a structure. In order to reduce the sound transmission through a cylinder with better STL, an acoustic quieting process needs to be implemented. One efficient ways to minimize sound transmission is using piezoelectric materials, which can be applied to reduce transmitted noise in different structures instead of damping approaches avoiding burdensome to fully dampen structural vibrations via passive methods. This study proposes a model using different sizes and configurations of piezoelectric electrode patches to increase the STL through thick-walled piezo-laminated cylindrical shells. The cylindrical shell is modeled using the three-dimensional theory of elasticity and piezoelasticity, and the Helmholtz equation is used for the wave propagation consideration inside the acoustic cavity as well as through the surrounding fluids. The STL is calculated using an exact integration of acoustic power over the outside surface of the shell. The analytical solution is compared with finite element numerical results to verify its validity. Parametric studies are conducted to investigate the effects of sizes and configurations of electrodes on STL. Results are presented with specific recommendations regarding the electrode size and configuration for active sound absorption. In addition, by proper choice of electrode size, one can avoid the resonance frequencies of the cylinder to provide higher sound transmission loss.
© 2022 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Freight transport modal shifts in a TIMES energy model: Impacts of endogenous and exogenous modeling choice.\n \n \n \n \n\n\n \n Pedinotti-Castelle, M.; Pineau, P.; Vaillancourt, K.; and Amor, B.\n\n\n \n\n\n\n Applied Energy, 324. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"FreightPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223012420570 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Freight transport modal shifts in a TIMES energy model: Impacts of endogenous and exogenous modeling choice},\njournal = {Applied Energy},\nauthor = {Pedinotti-Castelle, Marianne and Pineau, Pierre-Olivier and Vaillancourt, Kathleen and Amor, Ben},\nvolume = {324},\nyear = {2022},\nissn = {03062619},\nabstract = {<div data-language="eng" data-ev-field="abstract">The freight transportation sector accounted for 10.1% of global emissions and 16.2% of Quebec's greenhouse gas emissions in 2018. In this sector, the most salient yet little explored behavioral change opportunity is the modal shift from heavy trucks to trains. Current model developments are being made so that E4 modelers represent modal choices as endogenous variables in the models. However, if we want to continue to improve the realism of the models, it is important to know if this modeling technique is suitable for a world where radical changes are required. In this study, two types of modal shifts are implemented and compared in a TIMES-type energy model: exogenous modal shifts, with demand-side scenarios, and endogenous modal shifts, with the introduction of substitution elasticities as an endogenous behavioral feature of the model. The results of this study show that only the exogenous approach allows the modeling of disruptions: in demand, in energy consumption, and in system costs. With respect to vehicle type, the exogenous approach avoids investments in complex infrastructure (i.e., catenary), at least in the medium term, while the endogenous approach leads to results where electric trucks and catenaries appear in 2030. Only the scenario with a significant modal shift from heavy trucks to trains (Exog_max) avoids substantial energy consumption (17 PJ in 2030 and 10 PJ in 2050). The concluding recommendation is to use the exogenous approach in a disruptive modeling context. In a world where a paradigm shift is needed, the exogenous approach allows for a better representation of concepts that have been seldom modeled until now.<br/></div> © 2022 Elsevier Ltd},\nkey = {Elasticity},\n%keywords = {Automobiles;Energy utilization;Freight transportation;Gas emissions;Greenhouse gases;Investments;Overhead lines;Trucks;},\n%note = {Decarbonisation;Energy model;Energy-consumption;Freight transport;Heavy truck;Modal shifts;Model choice;Substitution elasticity;TIMES model;Transportation sector;},\nURL = {http://dx.doi.org/10.1016/j.apenergy.2022.119724},\n} \n\n\n
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The freight transportation sector accounted for 10.1% of global emissions and 16.2% of Quebec's greenhouse gas emissions in 2018. In this sector, the most salient yet little explored behavioral change opportunity is the modal shift from heavy trucks to trains. Current model developments are being made so that E4 modelers represent modal choices as endogenous variables in the models. However, if we want to continue to improve the realism of the models, it is important to know if this modeling technique is suitable for a world where radical changes are required. In this study, two types of modal shifts are implemented and compared in a TIMES-type energy model: exogenous modal shifts, with demand-side scenarios, and endogenous modal shifts, with the introduction of substitution elasticities as an endogenous behavioral feature of the model. The results of this study show that only the exogenous approach allows the modeling of disruptions: in demand, in energy consumption, and in system costs. With respect to vehicle type, the exogenous approach avoids investments in complex infrastructure (i.e., catenary), at least in the medium term, while the endogenous approach leads to results where electric trucks and catenaries appear in 2030. Only the scenario with a significant modal shift from heavy trucks to trains (Exog_max) avoids substantial energy consumption (17 PJ in 2030 and 10 PJ in 2050). The concluding recommendation is to use the exogenous approach in a disruptive modeling context. In a world where a paradigm shift is needed, the exogenous approach allows for a better representation of concepts that have been seldom modeled until now.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Axial performance of grouted C-Shaped concrete block masonry columns jacketed by carbon and glass FRP.\n \n \n \n \n\n\n \n Alotaibi, K. S.; Saiful Islam, A.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 267. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"AxialPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223112457398 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Axial performance of grouted C-Shaped concrete block masonry columns jacketed by carbon and glass FRP},\njournal = {Engineering Structures},\nauthor = {Alotaibi, Khalid Saqer and Saiful Islam, A.B.M. and Galal, Khaled},\nvolume = {267},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">To overcome the relatively low ductility and capacity of masonry elements, the confinement technique may be an effective alternative for improving their performance, especially the columns. Fiber Reinforced Polymers (FRP) jacketing is a potential approach has benefits in terms of strength enhancement and gaining ductile behavior. Therefore, in this study, two types of FRP were used to improve column axial capacity and ductility: carbon and glass FRP. The effect of FRP wrapping on the compressive behavior of concrete masonry columns was investigated experimentally. Fully grouted scaled masonry columns constructed using C-shaped concrete blocks were wrapped with FRP jackets and tested under concentric compressive load until failure. For this purpose, 18 half-scale masonry prisms under variations in FRP jacketing and FRP thickness were developed and tested in six sets. The effect of FRP confinement on the unconfined masonry columns was evaluated. The CFRP and GFRP jacketing increased the peak strength and ultimate axial strain. Confinement improves post-peak performance by softening the descending stress–strain relationships. Increasing FRP jacket thickness improved the axial strain, strength, and ductility of masonry columns. The CFRP wrap gives 10 ∼ 16% more strength than GFRP. Ultimate strain enhanced by 76 % and 57 % for CFRP and GFRP respectively.<br/></div> © 2022 Elsevier Ltd},\nkey = {Mechanical testing},\n%keywords = {Carbon fiber reinforced plastics;Carbon fibers;Compressive strength;Concrete construction;Concrete testing;Ductility;Glass;Grouting;Mortar;},\n%note = {C-shaped;Carbon fibre reinforced polymer;Confinement;Fiber-reinforced polymers;Fibre reinforced polymers;Glass-fibers;Glassfiber reinforced polymers (GFRP);Masonry columns;Performance;Strength;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.114698},\n} \n\n\n
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To overcome the relatively low ductility and capacity of masonry elements, the confinement technique may be an effective alternative for improving their performance, especially the columns. Fiber Reinforced Polymers (FRP) jacketing is a potential approach has benefits in terms of strength enhancement and gaining ductile behavior. Therefore, in this study, two types of FRP were used to improve column axial capacity and ductility: carbon and glass FRP. The effect of FRP wrapping on the compressive behavior of concrete masonry columns was investigated experimentally. Fully grouted scaled masonry columns constructed using C-shaped concrete blocks were wrapped with FRP jackets and tested under concentric compressive load until failure. For this purpose, 18 half-scale masonry prisms under variations in FRP jacketing and FRP thickness were developed and tested in six sets. The effect of FRP confinement on the unconfined masonry columns was evaluated. The CFRP and GFRP jacketing increased the peak strength and ultimate axial strain. Confinement improves post-peak performance by softening the descending stress–strain relationships. Increasing FRP jacket thickness improved the axial strain, strength, and ductility of masonry columns. The CFRP wrap gives 10 ∼ 16% more strength than GFRP. Ultimate strain enhanced by 76 % and 57 % for CFRP and GFRP respectively.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Wind loading on a low-slope gabled roof: Comparison of field measurements, wind tunnel data, and code provisions.\n \n \n \n \n\n\n \n Chavez, M.; Baskaran, A.; Aldoum, M.; Stathopoulos, T.; Geleta, T.; and Bitsuamlak, G.\n\n\n \n\n\n\n Engineering Structures, 267. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"WindPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223012410093 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind loading on a low-slope gabled roof: Comparison of field measurements, wind tunnel data, and code provisions},\njournal = {Engineering Structures},\nauthor = {Chavez, M. and Baskaran, A. and Aldoum, M. and Stathopoulos, T. and Geleta, T.N. and Bitsuamlak, G.T.},\nvolume = {267},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">The current wind load provisions for low-slope roofs in the NBCC were established in the 70 s with wind tunnel experiments using analog data technology. These coefficients have remained almost unchanged. As the wind pressure measurement tools have significantly improved during the past 50 years, verification of the original pressure coefficients is required. The National Research Council of Canada (NRC), in collaboration with the Special Interest Group on Dynamic Evaluation of Roofing Systems (SIGDERS) consortium, conducted a wind load investigation to verify the suitability of the current wind load provisions. The investigation was carried out using both field measurements and wind tunnel simulations. An ideal full-scale representation of the low-slope roof specified in building code was instrumented and continuous data was collected for four years. A duplication of the building was evaluated by two wind tunnels to investigate the effect of critical wind directions. The paper presents the efforts made to make field measurements comparable to wind tunnel data and code provisions. It was observed that records with mean wind a speed above 22 mph (10 m/s) reduce the data variability and maximize reliability, which are important features for the code verification process. The goal of this research is to combine multiple sources of data to verify the suitability of wind load provisions on low-slope roofs. The research focuses on NBCC-2020 as an application. Evidence is presented that the NBCC-2020 provisions for the Roof Edge Zone is currently underestimated and needs to be increased. The study suggests taking the opportunity of Edge provision enhancement to merge Corner and Edge into a unique "Perimeter" load provision. The suggested code change addresses the current underestimation of the Edge Zone coefficients (wind load upgrade), and provides construction simplification to minimize roofing failure associated with labour-induced errors during cladding system installation (constructability upgrade).<br/></div> © 2022},\nkey = {Wind tunnels},\n%keywords = {Aerodynamic loads;Codes (symbols);Roofs;Structural dynamics;Wind stress;},\n%note = {'current;Analogue data;Data technologies;Field measurement;Low-Slope Roof;Wind load;Wind load provisions;Wind loading;Wind tunnel experiment;Wind-tunnel data;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.114646},\n} \n\n\n
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The current wind load provisions for low-slope roofs in the NBCC were established in the 70 s with wind tunnel experiments using analog data technology. These coefficients have remained almost unchanged. As the wind pressure measurement tools have significantly improved during the past 50 years, verification of the original pressure coefficients is required. The National Research Council of Canada (NRC), in collaboration with the Special Interest Group on Dynamic Evaluation of Roofing Systems (SIGDERS) consortium, conducted a wind load investigation to verify the suitability of the current wind load provisions. The investigation was carried out using both field measurements and wind tunnel simulations. An ideal full-scale representation of the low-slope roof specified in building code was instrumented and continuous data was collected for four years. A duplication of the building was evaluated by two wind tunnels to investigate the effect of critical wind directions. The paper presents the efforts made to make field measurements comparable to wind tunnel data and code provisions. It was observed that records with mean wind a speed above 22 mph (10 m/s) reduce the data variability and maximize reliability, which are important features for the code verification process. The goal of this research is to combine multiple sources of data to verify the suitability of wind load provisions on low-slope roofs. The research focuses on NBCC-2020 as an application. Evidence is presented that the NBCC-2020 provisions for the Roof Edge Zone is currently underestimated and needs to be increased. The study suggests taking the opportunity of Edge provision enhancement to merge Corner and Edge into a unique \"Perimeter\" load provision. The suggested code change addresses the current underestimation of the Edge Zone coefficients (wind load upgrade), and provides construction simplification to minimize roofing failure associated with labour-induced errors during cladding system installation (constructability upgrade).
© 2022\n
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\n \n\n \n \n \n \n \n \n Investigation and Modification of a CSSM-Based Elastic-Thermoviscoplastic Model for Clay.\n \n \n \n \n\n\n \n Fathalikhani, M.; Graham, J.; Kurz, D.; and Maghoul, P.\n\n\n \n\n\n\n International Journal of Geomechanics, 22(10). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"InvestigationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223012418428 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigation and Modification of a CSSM-Based Elastic-Thermoviscoplastic Model for Clay},\njournal = {International Journal of Geomechanics},\nauthor = {Fathalikhani, Marziyeh and Graham, James and Kurz, David and Maghoul, Pooneh},\nvolume = {22},\nnumber = {10},\nyear = {2022},\nissn = {15323641},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper examines the accuracy of a new elastic-thermoviscoplastic (E-TVP) constitutive model developed based on critical state soil mechanics. The model can be used for simulating the temperature-dependent and strain-rate-dependent behavior of clay soils. The study compares the E-TVP behavior of a single soil element with previously published thermo-mechanical experimental results performed on saturated clay specimens at different temperatures. Suggestions regarding unloading and reloading at constant temperatures as well as thermal consolidation under constant loads are presented. A modification for unloading-reloading adds a new criterion to the volumetric thermoviscoplastic strain rate formulation. A physics-based term is added to the current specific volume of the soil to include the viscous effect induced by temperature change. These modifications improve the convergence of laboratory data and simulated model responses. Comparisons of results from an earlier E-TVP model and the newly improved model provide evidence of improved predictive capabilities.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Strain rate},\n%keywords = {Clay;Critical current density (superconductivity);Soil mechanics;Unloading;},\n%note = {Clay soil;Critical state soil mechanics;Rate-dependent behaviors;Reloadings;Soil element;Strain-rate-dependent;Temperature dependent;Thermo-viscoplastic;Thermo-viscoplastic model;Thermoviscoplastic behavior;},\nURL = {http://dx.doi.org/10.1061/(ASCE)GM.1943-5622.0002480},\n} \n\n\n
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This paper examines the accuracy of a new elastic-thermoviscoplastic (E-TVP) constitutive model developed based on critical state soil mechanics. The model can be used for simulating the temperature-dependent and strain-rate-dependent behavior of clay soils. The study compares the E-TVP behavior of a single soil element with previously published thermo-mechanical experimental results performed on saturated clay specimens at different temperatures. Suggestions regarding unloading and reloading at constant temperatures as well as thermal consolidation under constant loads are presented. A modification for unloading-reloading adds a new criterion to the volumetric thermoviscoplastic strain rate formulation. A physics-based term is added to the current specific volume of the soil to include the viscous effect induced by temperature change. These modifications improve the convergence of laboratory data and simulated model responses. Comparisons of results from an earlier E-TVP model and the newly improved model provide evidence of improved predictive capabilities.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Finite-Element Simulation of the Lateral Response of Posttensioned Base Rocking Steel Bridge Piers.\n \n \n \n \n\n\n \n Rahmzadeh, A.; Tremblay, R.; and Alam, M. S.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 148(9). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"Finite-ElementPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223012388240 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Finite-Element Simulation of the Lateral Response of Posttensioned Base Rocking Steel Bridge Piers},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Rahmzadeh, Ahmad and Tremblay, Robert and Alam, M. Shahria},\nvolume = {148},\nnumber = {9},\nyear = {2022},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents the results of a finite-element (FE) study on posttensioned (PT) rocking steel bridge piers, each composed of a circular tubular column, welded end plates, PT strands, and axially yielding steel energy dissipators (EDs), and corresponding chairs. The pier is configured so that it rocks at its base. Previously conducted experiments on five scaled rocking steel columns are summarized. Three-dimensional (3D) continuum FE models of the tested specimens are generated with the objective of verifying the capability of the modeling approach in the simulation of the local and global responses. Strain-controlled cyclic coupon tests were performed to quantify the kinematic and isotropic hardening material parameters. A simplified method is proposed to model the cyclic loss of prestressing because of wedge seating in a typical industry monostrand anchorage system. The FE procedure is then calibrated against the experimental data at the material, component, and global pier levels. A parametric study is conducted to examine the effects of key factors such as material model, P-Delta, base plate dimensions, column diameter-to-thickness and initial axial force ratios, ED chairs, and ED location on the lateral cyclic response. It is demonstrated that, for a given target drift, local buckling and the resulting residual lateral deformations of a rocking steel pier are a function of the diameter-to-thickness and initial axial force ratios of the column and the ED chairs. By the proper selection of these variables, a stable and robust self-centering response can be obtained with minimal damage to the bridge pier.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Energy dissipators},\n%keywords = {Axial flow;Buckling;Finite element method;Plates (structural components);Steel bridges;Steel structures;},\n%note = {Axial force ratio;Finite elements simulation;Finite-element;Lateral response;Post tensioned;Posttensioned;Rocking;Seismic;Self centering;Steel bridge piers;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0003452},\n} \n\n\n
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This paper presents the results of a finite-element (FE) study on posttensioned (PT) rocking steel bridge piers, each composed of a circular tubular column, welded end plates, PT strands, and axially yielding steel energy dissipators (EDs), and corresponding chairs. The pier is configured so that it rocks at its base. Previously conducted experiments on five scaled rocking steel columns are summarized. Three-dimensional (3D) continuum FE models of the tested specimens are generated with the objective of verifying the capability of the modeling approach in the simulation of the local and global responses. Strain-controlled cyclic coupon tests were performed to quantify the kinematic and isotropic hardening material parameters. A simplified method is proposed to model the cyclic loss of prestressing because of wedge seating in a typical industry monostrand anchorage system. The FE procedure is then calibrated against the experimental data at the material, component, and global pier levels. A parametric study is conducted to examine the effects of key factors such as material model, P-Delta, base plate dimensions, column diameter-to-thickness and initial axial force ratios, ED chairs, and ED location on the lateral cyclic response. It is demonstrated that, for a given target drift, local buckling and the resulting residual lateral deformations of a rocking steel pier are a function of the diameter-to-thickness and initial axial force ratios of the column and the ED chairs. By the proper selection of these variables, a stable and robust self-centering response can be obtained with minimal damage to the bridge pier.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Strengthening pre-damaged RC square columns with fabric-reinforced cementitious matrix (FRCM): Experimental investigation.\n \n \n \n \n\n\n \n Alhoubi, Y.; El Refai, A.; Abed, F.; El-Maaddawy, T.; and Tello, N.\n\n\n \n\n\n\n Composite Structures, 294. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"StrengtheningPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222912362205 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Strengthening pre-damaged RC square columns with fabric-reinforced cementitious matrix (FRCM): Experimental investigation},\njournal = {Composite Structures},\nauthor = {Alhoubi, Yazan and El Refai, Ahmed and Abed, Farid and El-Maaddawy, Tamer and Tello, Noor},\nvolume = {294},\nyear = {2022},\nissn = {02638223},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study investigates the effectiveness of using fabric-reinforced cementitious matrix (FRCM) systems in repairing pre-damaged reinforced concrete (RC) square columns. Two groups of columns were fabricated and tested under concentric loading up to failure. Columns of each group had different spacing between their transverse reinforcement to investigate the effectiveness of FRCM reinforcement in confining the columns. The columns were subjected to two pre-damaging criteria prior to strengthening. Four columns were loaded up to their yielding capacity and then unloaded while the other two columns were subjected to three cycles of fatigue loading that ranged between 2% and 75% of the unstrengthened column's capacity. The pre-damaged columns were then strengthened with either two or four layers of polyparaphenylene-benzobisoxazole (PBO)–FRCM system. Test results showed that confining the pre-damaged columns with PBO–FRCM systems resulted in 7–42% enhancement in their load–carrying capacity and 47–272% improvement in their ductility. The predicted columns’ capacity calculated as per ACI 549 guidelines showed a good agreement with the experimental results. The experimental–to–predicted capacity ratio ranged between 0.82 and 1.03 for columns with tie spacing of 180 mm and between 0.92 and 1.09 for columns with tie spacing of 90 mm.<br/></div> © 2022 Elsevier Ltd},\nkey = {Ductility},\n%keywords = {Columns (structural);Reinforced concrete;},\n%note = {Capacity;Cementitious matrices;Column capacity;Confinement;Damage;Damaged columns;Fabric-reinforced cementitious matrix;Matrix systems;Polyparaphenylenes;Square columns;},\nURL = {http://dx.doi.org/10.1016/j.compstruct.2022.115784},\n} \n\n\n
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This study investigates the effectiveness of using fabric-reinforced cementitious matrix (FRCM) systems in repairing pre-damaged reinforced concrete (RC) square columns. Two groups of columns were fabricated and tested under concentric loading up to failure. Columns of each group had different spacing between their transverse reinforcement to investigate the effectiveness of FRCM reinforcement in confining the columns. The columns were subjected to two pre-damaging criteria prior to strengthening. Four columns were loaded up to their yielding capacity and then unloaded while the other two columns were subjected to three cycles of fatigue loading that ranged between 2% and 75% of the unstrengthened column's capacity. The pre-damaged columns were then strengthened with either two or four layers of polyparaphenylene-benzobisoxazole (PBO)–FRCM system. Test results showed that confining the pre-damaged columns with PBO–FRCM systems resulted in 7–42% enhancement in their load–carrying capacity and 47–272% improvement in their ductility. The predicted columns’ capacity calculated as per ACI 549 guidelines showed a good agreement with the experimental results. The experimental–to–predicted capacity ratio ranged between 0.82 and 1.03 for columns with tie spacing of 180 mm and between 0.92 and 1.09 for columns with tie spacing of 90 mm.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Condition assessment of concrete plates using impulse-response test with affinity propagation and homoscedasticity.\n \n \n \n \n\n\n \n Sajid, S.; Chouinard, L.; and Carino, N.\n\n\n \n\n\n\n Mechanical Systems and Signal Processing, 178. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ConditionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222912362139 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Condition assessment of concrete plates using impulse-response test with affinity propagation and homoscedasticity},\njournal = {Mechanical Systems and Signal Processing},\nauthor = {Sajid, Sikandar and Chouinard, Luc and Carino, Nicholas},\nvolume = {178},\nyear = {2022},\nissn = {08883270},\nabstract = {<div data-language="eng" data-ev-field="abstract">This article presents a procedure based on the impulse-response test and the affinity propagation algorithm to detect delamination, honeycomb, and debonding in concrete slabs. Frequency response functions (FRFs) generated with the impulse-response test according to the protocols of ASTM C1740 on a grid pattern are combined to define a feature space matrix. The affinity propagation (AP) algorithm is used to cluster the FRFs sharing similar features. Clusters are shown to correspond to either intact locations or defects and cluster membership can be used to locate defects in the slab. The effectiveness of the algorithm for defect delineation depends on the optimal number of exemplars and some objective criteria to categorize each cluster according to the severity of defects. To achieve this objective, an upper bound for the number of exemplars is proposed based on the number of principal components explaining most of the percent variance in the feature matrix for optimal defect detection and the variance of the FRF is proposed and validated as a criterion for ranking the severity of defects. Homogeneity of variance testing is used for merging exemplars that exhibit similar levels of variability to address potential overfitting associated with the AP algorithm. Two fully supported slabs with free edges and having different simulated defects, and a slab cast on a rigid insulation board with delamination and honeycomb are used to validate the proposed procedure. The proposed procedure is shown to efficiently detect shallow delaminations and debonding. The deep delamination and honeycomb in the slabs were delineated but to a lesser extent compared with the shallow delamination.<br/></div> © 2022 Elsevier Ltd},\nkey = {Defects},\n%keywords = {Clustering algorithms;Concrete slabs;Debonding;Frequency response;Impulse response;Matrix algebra;},\n%note = {Affinity propagation;Concrete plates;Condition assessments;Feature space;Frequency response functions;Grid pattern;Homoscedasticity;Honeycombing;Impulse-response test;Propagation algorithm;},\nURL = {http://dx.doi.org/10.1016/j.ymssp.2022.109289},\n} \n\n\n
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This article presents a procedure based on the impulse-response test and the affinity propagation algorithm to detect delamination, honeycomb, and debonding in concrete slabs. Frequency response functions (FRFs) generated with the impulse-response test according to the protocols of ASTM C1740 on a grid pattern are combined to define a feature space matrix. The affinity propagation (AP) algorithm is used to cluster the FRFs sharing similar features. Clusters are shown to correspond to either intact locations or defects and cluster membership can be used to locate defects in the slab. The effectiveness of the algorithm for defect delineation depends on the optimal number of exemplars and some objective criteria to categorize each cluster according to the severity of defects. To achieve this objective, an upper bound for the number of exemplars is proposed based on the number of principal components explaining most of the percent variance in the feature matrix for optimal defect detection and the variance of the FRF is proposed and validated as a criterion for ranking the severity of defects. Homogeneity of variance testing is used for merging exemplars that exhibit similar levels of variability to address potential overfitting associated with the AP algorithm. Two fully supported slabs with free edges and having different simulated defects, and a slab cast on a rigid insulation board with delamination and honeycomb are used to validate the proposed procedure. The proposed procedure is shown to efficiently detect shallow delaminations and debonding. The deep delamination and honeycomb in the slabs were delineated but to a lesser extent compared with the shallow delamination.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Damage detection for prefabricated building modules during transportation.\n \n \n \n \n\n\n \n Valinejadshoubi, M.; Bagchi, A.; and Moselhi, O.\n\n\n \n\n\n\n Automation in Construction, 142. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"DamagePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222912359726 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Damage detection for prefabricated building modules during transportation},\njournal = {Automation in Construction},\nauthor = {Valinejadshoubi, Mojtaba and Bagchi, Ashutosh and Moselhi, Osama},\nvolume = {142},\nyear = {2022},\nissn = {09265805},\nabstract = {<div data-language="eng" data-ev-field="abstract">Transportation of prefabricated modules is a critical process in modular construction and can cause additional stresses which may damage individual modules, leading to additional costs and time during the installation and operational phase if damaged parts are not timely restored or replaced. Therefore, utilizing a tracking and condition monitoring system is useful for modular building manufacturers to detect damaged modules upon arrival to the project job site. The tracking system, developed in this study, consists of a acceleration-sensor-based data acquisition (DAQ) module and a storage module, along with automated data analysis module to assess the structural condition of prefabricated building modules during transportation. The system uses the acceleration Root Mean Square (RMS) parameter and unsupervised clustering algorithms for damage detection. After detailed analysis, using performance measurement techniques: confusion matrix and accuracy score, it was found that the DBSCAN clustering algorithm yielded full accuracy score in the case of more than one level of damage compared to k-means, mean shift, and agglomerative clustering algorithms, which yielded accuracy scores of 0.81, 0.79, and 0.78 respectively. The developed system addresses existing challenges of cost and complexities associated with commercially available hardware systems and can provide evidence to support manufacturers' insurance claims on repair and/or replacement costs. However, the developed system should be tested further on more prefabricated building modules instrumented with a larger number of sensors.<br/></div> © 2022},\nkey = {Modular construction},\n%keywords = {Damage detection;Data acquisition;Digital storage;Insurance;K-means clustering;Structural health monitoring;},\n%note = {Additional costs;Additional stress;Clustering techniques;Condition monitoring systems;Damage-sensitive features;Installation phasis;Modular buildings;Monitoring system;Operational phasis;Transportation phase;},\nURL = {http://dx.doi.org/10.1016/j.autcon.2022.104466},\n} \n\n\n
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Transportation of prefabricated modules is a critical process in modular construction and can cause additional stresses which may damage individual modules, leading to additional costs and time during the installation and operational phase if damaged parts are not timely restored or replaced. Therefore, utilizing a tracking and condition monitoring system is useful for modular building manufacturers to detect damaged modules upon arrival to the project job site. The tracking system, developed in this study, consists of a acceleration-sensor-based data acquisition (DAQ) module and a storage module, along with automated data analysis module to assess the structural condition of prefabricated building modules during transportation. The system uses the acceleration Root Mean Square (RMS) parameter and unsupervised clustering algorithms for damage detection. After detailed analysis, using performance measurement techniques: confusion matrix and accuracy score, it was found that the DBSCAN clustering algorithm yielded full accuracy score in the case of more than one level of damage compared to k-means, mean shift, and agglomerative clustering algorithms, which yielded accuracy scores of 0.81, 0.79, and 0.78 respectively. The developed system addresses existing challenges of cost and complexities associated with commercially available hardware systems and can provide evidence to support manufacturers' insurance claims on repair and/or replacement costs. However, the developed system should be tested further on more prefabricated building modules instrumented with a larger number of sensors.
© 2022\n
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\n \n\n \n \n \n \n \n \n A general life estimation method for overhead conductors based on fretting fatigue behavior of wires.\n \n \n \n \n\n\n \n Rocha, P.; Langlois, S.; Lalonde, S.; Araujo, J.; and Castro, F.\n\n\n \n\n\n\n Theoretical and Applied Fracture Mechanics, 121. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222712317473 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A general life estimation method for overhead conductors based on fretting fatigue behavior of wires},\njournal = {Theoretical and Applied Fracture Mechanics},\nauthor = {Rocha, P.H.C. and Langlois, S. and Lalonde, S. and Araujo, J.A. and Castro, F.C.},\nvolume = {121},\nyear = {2022},\nissn = {01678442},\nabstract = {<div data-language="eng" data-ev-field="abstract">This work proposes a new methodology to assess the fatigue life of overhead conductors. The approach relies on (i) a global stress analysis of a multistranded conductor using a 3D finite element (FE) beam-to-beam contact model and (ii) a local fatigue damage analysis of the wires that exploits the similitude concept of the S-N method. The methodology can be applied to general conductor-clamp assemblies and provide predictions about the fatigue life and the critical regions of failure of conductors. The effectiveness of the methodology is demonstrated using experimental data of an AAAC 900 MCM conductor obtained in a resonant fatigue testing bench. Different levels of tension loads and bending displacement amplitudes were considered in the assessment. Experimental strain measurements show that the conductor-clamp FE model can compute the stress distribution along the critical region of failure of the conductor with satisfactory accuracy. New fretting fatigue data together with literature data of AA6201-T81 wires are used to demonstrate that the stress-based version of the Smith–Watson–Topper model can reasonably describe the fatigue behavior of these aluminum wires and hence is used as fatigue parameter to predict the fatigue behavior of the AAAC 900 MCM. The predicted critical regions of failure and fatigue lives of the conductor-clamp assembly were in good agreement with the experimental observations. The level of accuracy obtained is acceptable for engineering calculations, indicating that the methodology can be a promising fatigue analysis tool for overhead conductors.<br/></div> © 2022 Elsevier Ltd},\nkey = {Wire},\n%keywords = {Aluminum;Fatigue testing;Forecasting;Stress analysis;},\n%note = {3-D finite elements;Aluminum wires;Critical region;Estimation methods;Fatigue behaviour;Fretting fatigues;Global stress analysis;Life estimation;Life predictions;Overhead conductors;},\nURL = {http://dx.doi.org/10.1016/j.tafmec.2022.103443},\n} \n\n\n
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This work proposes a new methodology to assess the fatigue life of overhead conductors. The approach relies on (i) a global stress analysis of a multistranded conductor using a 3D finite element (FE) beam-to-beam contact model and (ii) a local fatigue damage analysis of the wires that exploits the similitude concept of the S-N method. The methodology can be applied to general conductor-clamp assemblies and provide predictions about the fatigue life and the critical regions of failure of conductors. The effectiveness of the methodology is demonstrated using experimental data of an AAAC 900 MCM conductor obtained in a resonant fatigue testing bench. Different levels of tension loads and bending displacement amplitudes were considered in the assessment. Experimental strain measurements show that the conductor-clamp FE model can compute the stress distribution along the critical region of failure of the conductor with satisfactory accuracy. New fretting fatigue data together with literature data of AA6201-T81 wires are used to demonstrate that the stress-based version of the Smith–Watson–Topper model can reasonably describe the fatigue behavior of these aluminum wires and hence is used as fatigue parameter to predict the fatigue behavior of the AAAC 900 MCM. The predicted critical regions of failure and fatigue lives of the conductor-clamp assembly were in good agreement with the experimental observations. The level of accuracy obtained is acceptable for engineering calculations, indicating that the methodology can be a promising fatigue analysis tool for overhead conductors.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Framework for spatial incident-level wildfire risk modelling to residential structures at the wildland urban interface.\n \n \n \n \n\n\n \n Abo El Ezz, A.; Boucher, J.; Cotton-Gagnon, A.; and Godbout, A.\n\n\n \n\n\n\n Fire Safety Journal, 131. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"FrameworkPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222612276421 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Framework for spatial incident-level wildfire risk modelling to residential structures at the wildland urban interface},\njournal = {Fire Safety Journal},\nauthor = {Abo El Ezz, Ahmad and Boucher, Jonathan and Cotton-Gagnon, Anne and Godbout, Alexandre},\nvolume = {131},\nyear = {2022},\nissn = {03797112},\nabstract = {<div data-language="eng" data-ev-field="abstract">Understanding wildfire impacts on structures in wildland urban interface (WUI) communities is fundamental for emergency response and mitigation planning to reduce potential social and economic losses. The magnitude of structures loss determines the direct economic costs for re-building, indirect economic losses due to evacuation and disruption of economic activities as well as shelter needs. This paper presents a framework for the development and implementation of incident-level wildfire impact assessment of WUI residential structures including the following successive components: hazard, inventory, exposure, and impact. The hazard model generates spatial and temporal distribution of fire intensity for wildfire event scenarios; the inventory model provides spatial pattern of exposed structures; the exposure model estimates the fire intensity at WUI locations; whereas the impact model evaluates the structures loss by applying newly developed empirical response functions represented as the relationship between fire intensity, distance from forest edge and expected proportion of burned structures. A case study application of the proposed framework is presented for loss assessment of structures in a WUI community of the northern boreal forest of Canada. The proposed framework is particularly useful to the public safety community for conducting what-if scenarios of wildfire impact in support of emergency and mitigation planning.<br/></div> © 2022 Elsevier Ltd},\nkey = {Losses},\n%keywords = {Fires;Forestry;Hazards;Housing;Risk assessment;Risk perception;},\n%note = {Exposure models;Fire exposure modeling;Fire exposures;Fire growth;Fire growth simulation;Fire intensity;Growth simulation;Structure loss;What-if wildfire scenario;Wildland urban interface;},\nURL = {http://dx.doi.org/10.1016/j.firesaf.2022.103625},\n} \n\n\n
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Understanding wildfire impacts on structures in wildland urban interface (WUI) communities is fundamental for emergency response and mitigation planning to reduce potential social and economic losses. The magnitude of structures loss determines the direct economic costs for re-building, indirect economic losses due to evacuation and disruption of economic activities as well as shelter needs. This paper presents a framework for the development and implementation of incident-level wildfire impact assessment of WUI residential structures including the following successive components: hazard, inventory, exposure, and impact. The hazard model generates spatial and temporal distribution of fire intensity for wildfire event scenarios; the inventory model provides spatial pattern of exposed structures; the exposure model estimates the fire intensity at WUI locations; whereas the impact model evaluates the structures loss by applying newly developed empirical response functions represented as the relationship between fire intensity, distance from forest edge and expected proportion of burned structures. A case study application of the proposed framework is presented for loss assessment of structures in a WUI community of the northern boreal forest of Canada. The proposed framework is particularly useful to the public safety community for conducting what-if scenarios of wildfire impact in support of emergency and mitigation planning.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Structural fatigue crack localisation based on spatially distributed entropy and wavelet transform.\n \n \n \n \n\n\n \n Cui, S.; Maghoul, P.; Liang, X.; Wu, N.; and Wang, Q.\n\n\n \n\n\n\n Engineering Structures, 266. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"StructuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222612293445 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Structural fatigue crack localisation based on spatially distributed entropy and wavelet transform},\njournal = {Engineering Structures},\nauthor = {Cui, Shihao and Maghoul, Pooneh and Liang, Xihui and Wu, Nan and Wang, Quan},\nvolume = {266},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Fatigue cracks are inevitable in the service life of engineering structures and can cause unexpected severe structural failures if left unattended. During structural vibrations, fatigue cracks, specifically at the initial stage, exhibit a repetitive open-close breathing-like phenomenon. Breathing cracks cause irregularities, bi-linearity, or perturbations in the vibration responses at different locations in engineering structures. Entropy can be used to quantify the different irregularities or bi-linearity induced by breathing phenomenon. This paper presents a new breathing crack localisation method based on a spatially distributed wavelet entropy approach. A numerical analysis was conducted to validate the proposed method and illustrate the fundamentals of the proposed methodology by analysing the localisation of breathing cracks at different locations in a beam structure. Furthermore, the vibration responses of the beam with predefined breathing cracks were analysed using spatial wavelet entropy in a laboratory setup to further prove the feasibility of the proposed method. It was concluded that the proposed spatial wavelet entropy approach can be effectively used for breathing crack localisation in engineering structures.<br/></div> © 2022 Elsevier Ltd},\nkey = {Entropy},\n%keywords = {Failure (mechanical);Fatigue crack propagation;Numerical methods;Spatial distribution;Structural dynamics;Structural health monitoring;Vibration analysis;Wavelet transforms;},\n%note = {Bi-linearity;Breathing crack;Crack breathing;Crack localization;Engineering structures;Entropy approach;Fatigue cracks;Vibration response;Wavelet entropies;Wavelets transform;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.114544},\n} \n\n\n
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Fatigue cracks are inevitable in the service life of engineering structures and can cause unexpected severe structural failures if left unattended. During structural vibrations, fatigue cracks, specifically at the initial stage, exhibit a repetitive open-close breathing-like phenomenon. Breathing cracks cause irregularities, bi-linearity, or perturbations in the vibration responses at different locations in engineering structures. Entropy can be used to quantify the different irregularities or bi-linearity induced by breathing phenomenon. This paper presents a new breathing crack localisation method based on a spatially distributed wavelet entropy approach. A numerical analysis was conducted to validate the proposed method and illustrate the fundamentals of the proposed methodology by analysing the localisation of breathing cracks at different locations in a beam structure. Furthermore, the vibration responses of the beam with predefined breathing cracks were analysed using spatial wavelet entropy in a laboratory setup to further prove the feasibility of the proposed method. It was concluded that the proposed spatial wavelet entropy approach can be effectively used for breathing crack localisation in engineering structures.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Wind-driven rain (WDR) loading on building facades: A state-of-the-art review.\n \n \n \n \n\n\n \n Gholamalipour, P.; Ge, H.; and Stathopoulos, T.\n\n\n \n\n\n\n Building and Environment, 221. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"Wind-drivenPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222612270408 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind-driven rain (WDR) loading on building facades: A state-of-the-art review},\njournal = {Building and Environment},\nauthor = {Gholamalipour, Payam and Ge, Hua and Stathopoulos, Ted},\nvolume = {221},\nyear = {2022},\nissn = {03601323},\nabstract = {<div data-language="eng" data-ev-field="abstract">Wind-driven rain (WDR), as one of the environmental loads, is an important factor in designing durable and climate-resilient buildings. The negative consequences of moisture intrusion caused by WDR include degradation of surface material, frost damage, salt efflorescence, structural cracking, interior damage, etc. WDR has been extensively studied through experimental measurements, numerical simulations, and semi-empirical methods. The previous WDR studies can be categorized into two areas: the study of WDR loading on buildings and the investigation of façade response to the impinging raindrops. While previous studies have investigated the characteristics of WDR loading on façade, such as the wetting pattern on various building configurations, i.e. stand-alone (isolated), street canyon, building-array, urban area. This review paper synthesizes results from the previous studies and provides a comprehensive summary and comparison of research approaches and their outcomes regarding quantification of WDR loading on building facades. The effect of meteorological and geometrical parameters on the interaction of WDR and buildings has been discussed. A cross-comparison of the WDR results has been performed based on previous experimental, CFD, and semi-empirical studies. The effectiveness of RANS and LES approaches has also been discussed. This paper shows that WDR results depend on the CFD approach selected and on the type of WDR modeling techniques used, i.e. Lagrangian Particle Tracking (LPT), and Eulerian Multiphase (EM). It is important to consider turbulent dispersion for the lower part of the windward façade in the case of high-rise buildings in CFD simulations. Finally, the review highlights potential research gaps in WDR.<br/></div> © 2022 Elsevier Ltd},\nkey = {Drying},\n%keywords = {Facades;Geometry;Numerical methods;Rain;Surface chemistry;Tall buildings;Wind tunnels;},\n%note = {Building facades;CFD modeling;Environmental loads;Meteorological and geometrical parameter;Semiempirical models;State-of-the art reviews;Wind field measurements;Wind tunnel measurements;Wind-driven rain;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2022.109314},\n} \n\n\n
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Wind-driven rain (WDR), as one of the environmental loads, is an important factor in designing durable and climate-resilient buildings. The negative consequences of moisture intrusion caused by WDR include degradation of surface material, frost damage, salt efflorescence, structural cracking, interior damage, etc. WDR has been extensively studied through experimental measurements, numerical simulations, and semi-empirical methods. The previous WDR studies can be categorized into two areas: the study of WDR loading on buildings and the investigation of façade response to the impinging raindrops. While previous studies have investigated the characteristics of WDR loading on façade, such as the wetting pattern on various building configurations, i.e. stand-alone (isolated), street canyon, building-array, urban area. This review paper synthesizes results from the previous studies and provides a comprehensive summary and comparison of research approaches and their outcomes regarding quantification of WDR loading on building facades. The effect of meteorological and geometrical parameters on the interaction of WDR and buildings has been discussed. A cross-comparison of the WDR results has been performed based on previous experimental, CFD, and semi-empirical studies. The effectiveness of RANS and LES approaches has also been discussed. This paper shows that WDR results depend on the CFD approach selected and on the type of WDR modeling techniques used, i.e. Lagrangian Particle Tracking (LPT), and Eulerian Multiphase (EM). It is important to consider turbulent dispersion for the lower part of the windward façade in the case of high-rise buildings in CFD simulations. Finally, the review highlights potential research gaps in WDR.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Local and global instabilities of rolled T-section columns under axial compression.\n \n \n \n \n\n\n \n Li, L.; Fafard, M.; and Boissonnade, N.\n\n\n \n\n\n\n Thin-Walled Structures, 178. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"LocalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222412220601 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Local and global instabilities of rolled T-section columns under axial compression},\njournal = {Thin-Walled Structures},\nauthor = {Li, Liya and Fafard, Mario and Boissonnade, Nicolas},\nvolume = {178},\nyear = {2022},\nissn = {02638231},\nabstract = {<div data-language="eng" data-ev-field="abstract">The resistance capacity of rolled T-section columns comprising slender webs is investigated in this paper. Both (i) cross-sectional behavior influenced by local buckling and (ii) member behavior influenced by global buckling are investigated through extensive numerical analyses. Regarding cross-section resistance, current design rules rely on the traditional cross-section classification system and the Effective Width Method (EWM), while local–global coupled instabilities in members with slender plate elements are usually addressed through the EWM combined with flexural–torsional buckling curves, which leads to conservative and scattered predictions for T-section members, mainly because the effects of torsional buckling are considered twice: through the EWM and through the member buckling curves. To overcome these shortcomings, an Overall Interaction Concept (OIC) approach is proposed in this paper, providing a more economic and simple design method for both T-section members. The load resistances predicted by the OIC, Eurocode 3, the American Specifications and the Australian Standards are compared with numerical and experimental results. Overall, the results show that the OIC-based approach provides more accurate and consistent predictions than current design recommendations and is suitable to be included in current steel structural design standards.<br/></div> © 2022 Elsevier Ltd},\nkey = {Buckling},\n%keywords = {Columns (structural);Structural design;},\n%note = {'current;Buckling curves;Coupled instability;Effective width methods;Global instability;Interaction concepts;Local instability;Overall interaction concept;T sections;T-section column;},\nURL = {http://dx.doi.org/10.1016/j.tws.2022.109517},\n} \n\n\n
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The resistance capacity of rolled T-section columns comprising slender webs is investigated in this paper. Both (i) cross-sectional behavior influenced by local buckling and (ii) member behavior influenced by global buckling are investigated through extensive numerical analyses. Regarding cross-section resistance, current design rules rely on the traditional cross-section classification system and the Effective Width Method (EWM), while local–global coupled instabilities in members with slender plate elements are usually addressed through the EWM combined with flexural–torsional buckling curves, which leads to conservative and scattered predictions for T-section members, mainly because the effects of torsional buckling are considered twice: through the EWM and through the member buckling curves. To overcome these shortcomings, an Overall Interaction Concept (OIC) approach is proposed in this paper, providing a more economic and simple design method for both T-section members. The load resistances predicted by the OIC, Eurocode 3, the American Specifications and the Australian Standards are compared with numerical and experimental results. Overall, the results show that the OIC-based approach provides more accurate and consistent predictions than current design recommendations and is suitable to be included in current steel structural design standards.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n A Progressive Approach to Account for Large-Scale Roughness of Concrete-Rock Interface in Practical Stability Analyses for Dam Safety Evaluation.\n \n \n \n \n\n\n \n Saichi, T.; Renaud, S.; and Bouaanani, N.\n\n\n \n\n\n\n International Journal of Geomechanics, 22(8). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222412218058 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Progressive Approach to Account for Large-Scale Roughness of Concrete-Rock Interface in Practical Stability Analyses for Dam Safety Evaluation},\njournal = {International Journal of Geomechanics},\nauthor = {Saichi, Tarik and Renaud, Sylvain and Bouaanani, Najib},\nvolume = {22},\nnumber = {8},\nyear = {2022},\nissn = {15323641},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper proposes a progressive approach to assess the properties of large-scale roughness at dam-rock interfaces and the implementation of their effects into practical dam stability analyses. The analysis steps, ranked per increasing degree of complexity, consist of studying a gravity dam monolith using, first, the gravity method (GM), second, the finite element (FE) method (FEM) with a simplified horizontal planar dam-rock interface, and, third, the FEM with a detailed irregular geometry of the dam-rock interface. In the first two steps, the simplification of the rock foundation geometry is paired with the implementation of apparent cohesion and friction angle into the models. These apparent parameters are evaluated based on nonlinear shear strength criteria combined with an interface roughness coefficient (IRC) introduced to characterize the roughness of a dam-rock joint extending along the whole dam footprint. This coefficient is approximated herein numerically based on FE models. The inputs and steps of the progressive approach are illustrated through several examples of typical dam-rock systems and rock profiles based on bathymetric and LiDAR surveys. The results mainly show that the effects of rock foundation roughness on dam sliding stability can be efficiently represented with apparent cohesion and friction angles. The effectiveness of the simplified models coupled with the conservatism of the results they provide are likely to favor their adoption by practicing engineers.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Finite element method},\n%keywords = {Concrete dams;Concretes;Friction;Gravity dams;Rocks;Safety factor;Slope stability;},\n%note = {Apparent cohesion and friction angle;Cohesion angle;Concrete-rock interface;Friction angles;Large-scales;Practical stability analysis;Rock foundation;Rock interfaces;Shears strength;Sliding stability;},\nURL = {http://dx.doi.org/10.1061/(ASCE)GM.1943-5622.0002468},\n} \n\n\n
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This paper proposes a progressive approach to assess the properties of large-scale roughness at dam-rock interfaces and the implementation of their effects into practical dam stability analyses. The analysis steps, ranked per increasing degree of complexity, consist of studying a gravity dam monolith using, first, the gravity method (GM), second, the finite element (FE) method (FEM) with a simplified horizontal planar dam-rock interface, and, third, the FEM with a detailed irregular geometry of the dam-rock interface. In the first two steps, the simplification of the rock foundation geometry is paired with the implementation of apparent cohesion and friction angle into the models. These apparent parameters are evaluated based on nonlinear shear strength criteria combined with an interface roughness coefficient (IRC) introduced to characterize the roughness of a dam-rock joint extending along the whole dam footprint. This coefficient is approximated herein numerically based on FE models. The inputs and steps of the progressive approach are illustrated through several examples of typical dam-rock systems and rock profiles based on bathymetric and LiDAR surveys. The results mainly show that the effects of rock foundation roughness on dam sliding stability can be efficiently represented with apparent cohesion and friction angles. The effectiveness of the simplified models coupled with the conservatism of the results they provide are likely to favor their adoption by practicing engineers.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Nonlinear Wind and Earthquake Loads on Tall Steel-Braced Frame Buildings.\n \n \n \n \n\n\n \n Athanasiou, A.; Tirca, L.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 148(8). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"NonlinearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222312205747 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Nonlinear Wind and Earthquake Loads on Tall Steel-Braced Frame Buildings},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Athanasiou, Anastasia and Tirca, Lucia and Stathopoulos, Ted},\nvolume = {148},\nnumber = {8},\nyear = {2022},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">Although time-domain response analyses have been commonly used in the design of tall buildings, the code-based wind design continues to rely on prescriptive static methods. Moreover, buildings subjected to both earthquakes and wind, where both are critical, could be prone to ineffective seismic response (increasing bottom-floor member sections due to wind demand reduces the system's ductility) and noneconomic lateral force-resisting system (design for elastic response under wind loads). The incompatibility in the current building code when addressing the seismic and wind design such as: the consideration of different return periods for wind and earthquake; design for ductility under earthquake versus the elastic response under wind; and the governing lateral load for tall steel buildings of rectangular floor plans located in moderate-to-high seismic zones, are discussed herein. First, a design methodology for developing along-wind history series, generated from wind-tunnel pressure records available from the Tokyo Polytechnic University aerodynamic database, is provided. Then, incremental dynamic analyses under winds and earthquake loads are carried out independently in a case study, and insights into the collapse mechanisms are presented. The findings show that the annual failure probability under wind is greater than that under earthquakes.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Time domain analysis},\n%keywords = {Architectural design;Ductility;Earthquakes;Floors;Seismic design;Seismic response;Structural frames;Tall buildings;Wind tunnels;},\n%note = {Earthquake load;Elastic response;Frame buildings;Non-linear dynamic analysis;Response analysis;Static method;Steel braced frames;Time domain response;Wind design;Wind load;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0003375},\n} \n\n\n
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Although time-domain response analyses have been commonly used in the design of tall buildings, the code-based wind design continues to rely on prescriptive static methods. Moreover, buildings subjected to both earthquakes and wind, where both are critical, could be prone to ineffective seismic response (increasing bottom-floor member sections due to wind demand reduces the system's ductility) and noneconomic lateral force-resisting system (design for elastic response under wind loads). The incompatibility in the current building code when addressing the seismic and wind design such as: the consideration of different return periods for wind and earthquake; design for ductility under earthquake versus the elastic response under wind; and the governing lateral load for tall steel buildings of rectangular floor plans located in moderate-to-high seismic zones, are discussed herein. First, a design methodology for developing along-wind history series, generated from wind-tunnel pressure records available from the Tokyo Polytechnic University aerodynamic database, is provided. Then, incremental dynamic analyses under winds and earthquake loads are carried out independently in a case study, and insights into the collapse mechanisms are presented. The findings show that the annual failure probability under wind is greater than that under earthquakes.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Reversed-Cyclic Response of Shear-Critical Rectangular Bridge Columns.\n \n \n \n \n\n\n \n Massa, R. J.; Cook, W. D.; and Mitchell, D.\n\n\n \n\n\n\n Journal of Bridge Engineering, 27(8). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"Reversed-CyclicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222312197347 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Reversed-Cyclic Response of Shear-Critical Rectangular Bridge Columns},\njournal = {Journal of Bridge Engineering},\nauthor = {Massa, Rico J. and Cook, William D. and Mitchell, Denis},\nvolume = {27},\nnumber = {8},\nyear = {2022},\nissn = {10840702},\nabstract = {<div data-language="eng" data-ev-field="abstract">The results of an experimental program comparing the responses of shear-critical rectangular columns tested under monotonic and reversed-cyclic loading are presented. These specimens had a constant compressive axial load and varying amounts of transverse reinforcement. Comparisons of the monotonic and reversed-cyclic loading responses are discussed. The reversed-cyclic peak shear strengths were about 11% and 17% lower, on average, than the monotonic peak strengths for the positive peak and the negative peak, respectively. Response predictions were made for columns from this experimental program, as well as for tests by other researchers, on rectangular shear-critical columns. Prediction methods included those based on current load and resistance factor design (LRFD) standards and seismic guidelines with and without an included strut, as well as nonlinear finite-element analysis. Methods based on official standards and guidelines gave similar conservative results for the shear strength. It was concluded that the addition of the horizontal components of inclined struts associated with the compressive axial loads to the sectional predictions improved the strength predictions by about 37% on average. In addition to providing accurate shear strength predictions, nonlinear finite-element analysis is capable of predicting the complete member response and accounts for the combined contributions of the concrete, transverse reinforcement, and inclined strut action from the applied axial compressive load.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Forecasting},\n%keywords = {Axial loads;Cyclic loads;Finite element method;Reinforcement;Seismic design;Software testing;Struts;},\n%note = {Bridge columns;Compressive axial load;Cyclic response;Experimental program;Inclined struts;Monotonics;Nonlinear finite element analyses (FEA);Reversed cyclic loading;Shear critical;Transverse reinforcement;},\nURL = {http://dx.doi.org/10.1061/(ASCE)BE.1943-5592.0001895},\n} \n\n\n
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The results of an experimental program comparing the responses of shear-critical rectangular columns tested under monotonic and reversed-cyclic loading are presented. These specimens had a constant compressive axial load and varying amounts of transverse reinforcement. Comparisons of the monotonic and reversed-cyclic loading responses are discussed. The reversed-cyclic peak shear strengths were about 11% and 17% lower, on average, than the monotonic peak strengths for the positive peak and the negative peak, respectively. Response predictions were made for columns from this experimental program, as well as for tests by other researchers, on rectangular shear-critical columns. Prediction methods included those based on current load and resistance factor design (LRFD) standards and seismic guidelines with and without an included strut, as well as nonlinear finite-element analysis. Methods based on official standards and guidelines gave similar conservative results for the shear strength. It was concluded that the addition of the horizontal components of inclined struts associated with the compressive axial loads to the sectional predictions improved the strength predictions by about 37% on average. In addition to providing accurate shear strength predictions, nonlinear finite-element analysis is capable of predicting the complete member response and accounts for the combined contributions of the concrete, transverse reinforcement, and inclined strut action from the applied axial compressive load.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Estimate of V/H spectral acceleration ratios for firm soil sites in Eastern Canada.\n \n \n \n \n\n\n \n Mazloom, S.; and Assi, R.\n\n\n \n\n\n\n Soil Dynamics and Earthquake Engineering, 159. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"EstimatePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222112143258 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Estimate of V/H spectral acceleration ratios for firm soil sites in Eastern Canada},\njournal = {Soil Dynamics and Earthquake Engineering},\nauthor = {Mazloom, Shahabaldin and Assi, Rola},\nvolume = {159},\nyear = {2022},\nissn = {02677261},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study aims to provide an estimate of vertical-to-horizontal (V/H) pseudo-spectral acceleration (PSA) ratios in the Eastern Canada seismic zone for firm soils (360 < V<inf>s30</inf> < 760 m/s) referred to as Site Class C in the National Building Code of Canada (NBC). According to previous studies, the 2/3 V/H empirical ratio prescribed in NBC is deemed overestimated for far-field areas and underestimated for near-field areas. In this study, the V/H PSA ratios were computed for 248 records from 67 historic earthquakes in the Eastern Canada region with a magnitude M<inf>w</inf> ≥ 3.0 and an epicentral distance (R<inf>epi</inf>) < 150 km. Given the lack of available records for Site Class C in this region, sets of records from other site classes, mostly Site Class A (Hard rock), were selected and converted to the corresponding records on Site Class C. To this end, the equivalent linear method, using the Pressure-Dependent Modified Kondner Zelasko (MKZ) model of analysis in the frequency domain was selected using the software DEEPSOIL. Computed V/H PSA ratios were then calibrated with those obtained from available Ground Motion Prediction Equations (GMPEs) compatible with Site Class C of the studied region. The computed mean V/H PSA ratios were found to exceed the common value of 2/3 recommended in most codes, especially for short periods up to 1.3 sec, and new V/H ratios were proposed as a function of the fundamental period of the building. Finally, a profile of vertical acceleration design spectra (ADS<inf>ver</inf>) was proposed for Site Class C in Montreal and compared with those obtained by ASCE/SEI 7–16 and ASCE 41-17 provisions.<br/></div> © 2022 Elsevier Ltd},\nkey = {Motion estimation},\n%keywords = {Seismic design;Earthquakes;C (programming language);Codes (symbols);Frequency domain analysis;Acceleration;Equations of motion;},\n%note = {Acceleration design spectrum;Design spectrum;Eastern Canada;Eastern canada seismic zone;Ground motion prediction;Ground motion prediction equation;Prediction equations;Pseudo spectral acceleration;Seismic zones;Site class;Spectral acceleration;},\nURL = {http://dx.doi.org/10.1016/j.soildyn.2022.107350},\n} \n\n\n
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This study aims to provide an estimate of vertical-to-horizontal (V/H) pseudo-spectral acceleration (PSA) ratios in the Eastern Canada seismic zone for firm soils (360 < Vs30 < 760 m/s) referred to as Site Class C in the National Building Code of Canada (NBC). According to previous studies, the 2/3 V/H empirical ratio prescribed in NBC is deemed overestimated for far-field areas and underestimated for near-field areas. In this study, the V/H PSA ratios were computed for 248 records from 67 historic earthquakes in the Eastern Canada region with a magnitude Mw ≥ 3.0 and an epicentral distance (Repi) < 150 km. Given the lack of available records for Site Class C in this region, sets of records from other site classes, mostly Site Class A (Hard rock), were selected and converted to the corresponding records on Site Class C. To this end, the equivalent linear method, using the Pressure-Dependent Modified Kondner Zelasko (MKZ) model of analysis in the frequency domain was selected using the software DEEPSOIL. Computed V/H PSA ratios were then calibrated with those obtained from available Ground Motion Prediction Equations (GMPEs) compatible with Site Class C of the studied region. The computed mean V/H PSA ratios were found to exceed the common value of 2/3 recommended in most codes, especially for short periods up to 1.3 sec, and new V/H ratios were proposed as a function of the fundamental period of the building. Finally, a profile of vertical acceleration design spectra (ADSver) was proposed for Site Class C in Montreal and compared with those obtained by ASCE/SEI 7–16 and ASCE 41-17 provisions.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Knowledge-Enhanced Deep Learning for Simulation of Extratropical Cyclone Wind Risk.\n \n \n \n \n\n\n \n Snaiki, R.; and Wu, T.\n\n\n \n\n\n\n Atmosphere, 13(5). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"Knowledge-EnhancedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222112134021 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Knowledge-Enhanced Deep Learning for Simulation of Extratropical Cyclone Wind Risk},\njournal = {Atmosphere},\nauthor = {Snaiki, Reda and Wu, Teng},\nvolume = {13},\nnumber = {5},\nyear = {2022},\nissn = {20734433},\nabstract = {<div data-language="eng" data-ev-field="abstract">Boundary-layer wind associated with extratropical cyclones (ETCs) is an essential element for posing serious threats to the urban centers of eastern North America. Using a similar methodology for tropical cyclone (TC) wind risk (i.e., hurricane tracking approach), the ETC wind risk can be accordingly simulated. However, accurate and efficient assessment of the wind field inside the ETC is currently not available. To this end, a knowledge-enhanced deep learning (KEDL) is developed in this study to estimate the ETC boundary-layer winds over eastern North America. Both physics-based equations and semi-empirical formulas are integrated as part of the system loss function to regularize the neural network. More specifically, the scale-analysis-based reduced-order Navier– Stokes equations that govern the ETC wind field and the European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA) ERA-interim data-based two-dimensional (2D) parametric formula (with respect to radial and azimuthal coordinates) that prescribes an asymmetric ETC pressure field are respectively employed as rationalism-based and empiricism-based knowledge to enhance the deep neural network. The developed KEDL, using the standard storm parameters (i.e., spatial coordinates, central pressure difference, translational speed, approach angle, latitude of ETC center, and surface roughness) as the network inputs, can provide the threedimensional (3D) boundary-layer wind field of an arbitrary ETC with high computational efficiency and accuracy. Finally, the KEDL-based wind model is coupled with a large ETC synthetic track database (SynthETC), where 6-hourly ETC center location and pressure deficit are included to effectively assess the wind risk along the US northeast coast in terms of annual exceedance probability.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Risk analysis},\n%keywords = {Hurricanes;Surface roughness;Computational efficiency;Deep neural networks;Boundary layers;Storms;Navier Stokes equations;Weather forecasting;Risk assessment;},\n%note = {Boundary-layer wind;Cyclone center;Eastern north america;Essential elements;Extratropical cyclones;Knowledge-enhanced deep learning;Nor'easters;Reanalysis;Wind field;Wind risks;},\nURL = {http://dx.doi.org/10.3390/atmos13050757},\n} \n\n\n
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Boundary-layer wind associated with extratropical cyclones (ETCs) is an essential element for posing serious threats to the urban centers of eastern North America. Using a similar methodology for tropical cyclone (TC) wind risk (i.e., hurricane tracking approach), the ETC wind risk can be accordingly simulated. However, accurate and efficient assessment of the wind field inside the ETC is currently not available. To this end, a knowledge-enhanced deep learning (KEDL) is developed in this study to estimate the ETC boundary-layer winds over eastern North America. Both physics-based equations and semi-empirical formulas are integrated as part of the system loss function to regularize the neural network. More specifically, the scale-analysis-based reduced-order Navier– Stokes equations that govern the ETC wind field and the European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA) ERA-interim data-based two-dimensional (2D) parametric formula (with respect to radial and azimuthal coordinates) that prescribes an asymmetric ETC pressure field are respectively employed as rationalism-based and empiricism-based knowledge to enhance the deep neural network. The developed KEDL, using the standard storm parameters (i.e., spatial coordinates, central pressure difference, translational speed, approach angle, latitude of ETC center, and surface roughness) as the network inputs, can provide the threedimensional (3D) boundary-layer wind field of an arbitrary ETC with high computational efficiency and accuracy. Finally, the KEDL-based wind model is coupled with a large ETC synthetic track database (SynthETC), where 6-hourly ETC center location and pressure deficit are included to effectively assess the wind risk along the US northeast coast in terms of annual exceedance probability.
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Seismic Performance Assessment of a Retrofitted Bridge with Natural Rubber Isolators in Cold Weather Environments Using Fragility Surfaces.\n \n \n \n \n\n\n \n Bandini, P. A. C.; Siqueira, G. H.; Padgett, J. E.; and Paultre, P.\n\n\n \n\n\n\n Journal of Bridge Engineering, 27(6). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221712039890 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Performance Assessment of a Retrofitted Bridge with Natural Rubber Isolators in Cold Weather Environments Using Fragility Surfaces},\njournal = {Journal of Bridge Engineering},\nauthor = {Bandini, Pedro Alexandre Conde and Siqueira, Gustavo Henrique and Padgett, Jamie Ellen and Paultre, Patrick},\nvolume = {27},\nnumber = {6},\nyear = {2022},\nissn = {10840702},\nabstract = {<div data-language="eng" data-ev-field="abstract">Rubber-based seismic isolation has been demonstrated to be one of the most effective measures to protect structural elements from damage during earthquakes and a viable option to retrofit existing structures with poor seismic detailing. The main constituent of these isolation units is rubber, a material that is subject to stiffening when exposed to low air temperatures. In the case of isolated highway bridges, thermal stiffening might reduce the efficiency of isolators, transferring higher forces to the substructure. Assessment of the seismic response of retrofitted structures using rubber isolators in cold regions is thus necessary. Accordingly, in this study, the effect of low temperatures on the seismic performance of a highway bridge retrofitted with natural rubber (NR) isolators is quantified using a probabilistic framework based on fragility surfaces. From the component-And system-level surfaces, it is revealed that the effects of cold temperatures on highway bridges retrofitted with elastomeric isolators may be negligible, depending on the configuration of lateral restraining structures. However, when isolators are able to perform their function without impediment, their thermal stiffening might be significantly detrimental to the bridge's substructure, mainly affecting bent columns.<br/></div> © 2021 This work is made available under the terms of the Creative Commons Attribution 4.0 International license,.},\nkey = {Rubber},\n%keywords = {Earthquakes;Highway bridges;Seismic waves;},\n%note = {Cold weather;Effective measures;Existing structure;Exposed to;Rubber isolators;Seismic detailing;Seismic isolation;Seismic performance assessment;Structural elements;Thermal stiffening;},\nURL = {http://dx.doi.org/10.1061/(ASCE)BE.1943-5592.0001873},\n} \n\n\n
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Rubber-based seismic isolation has been demonstrated to be one of the most effective measures to protect structural elements from damage during earthquakes and a viable option to retrofit existing structures with poor seismic detailing. The main constituent of these isolation units is rubber, a material that is subject to stiffening when exposed to low air temperatures. In the case of isolated highway bridges, thermal stiffening might reduce the efficiency of isolators, transferring higher forces to the substructure. Assessment of the seismic response of retrofitted structures using rubber isolators in cold regions is thus necessary. Accordingly, in this study, the effect of low temperatures on the seismic performance of a highway bridge retrofitted with natural rubber (NR) isolators is quantified using a probabilistic framework based on fragility surfaces. From the component-And system-level surfaces, it is revealed that the effects of cold temperatures on highway bridges retrofitted with elastomeric isolators may be negligible, depending on the configuration of lateral restraining structures. However, when isolators are able to perform their function without impediment, their thermal stiffening might be significantly detrimental to the bridge's substructure, mainly affecting bent columns.
© 2021 This work is made available under the terms of the Creative Commons Attribution 4.0 International license,.\n
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\n \n\n \n \n \n \n \n \n On the possibilities of multilevel analysis to cover data gaps in consequential S-LCA: Case of multistory residential building.\n \n \n \n \n\n\n \n Fauzi, R. T.; Lavoie, P.; Tanguy, A.; and Amor, B.\n\n\n \n\n\n\n Journal of Cleaner Production, 355. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"OnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221712012179 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {On the possibilities of multilevel analysis to cover data gaps in consequential S-LCA: Case of multistory residential building},\njournal = {Journal of Cleaner Production},\nauthor = {Fauzi, Rizal Taufiq and Lavoie, Patrick and Tanguy, Audrey and Amor, Ben},\nvolume = {355},\nyear = {2022},\nissn = {09596526},\nabstract = {<div data-language="eng" data-ev-field="abstract">Building is affiliated with much of the social impact and benefits. However, for long term assessments that can capture indirect consequences, the current common attributional approach is lacking. The challenge become more obvious with large data amounts required to perform social life cycle assessment (S-LCA), and often less representative non site-specific data must be used to fill data gaps. To address above-mentioned problem, this paper presents a multilevel analysis in consequential S-LCA to further demonstrate the added value of such evaluation on addressing the existing data gaps by integrating the four level of analysis: unit process, company, sector and country. The methodology used is multilevel assessment on these four levels performed to five stakeholder of worker, local community, user, society and supplier. The case study used to demonstrate this is a multistorey building that has long supply chain from local, regional and abroad. The results show that using multilevel could help to fill the data gaps. For example, with multilevel analysis, material company or activities could fill at least 14 of the 24 social indicators through company's assessment. If it was only performed on one level, the indicators that can be assessed is lesser. Even though more data is not necessarily better but it can broaden the view to understand the potential hotspot of social impact/benefit and the sphere of its influence to the stakeholders. From consequential point of view, it also shows that for a long term, a decision of constructing more hybrid multistory building will be closely related to some social impacts and benefits in different level, different product life cycle and in different geographical area that cannot be captured with single level of analysis.<br/></div> © 2022 Elsevier Ltd},\nkey = {Life cycle},\n%keywords = {Economic and social effects;Office buildings;Supply chains;Tall buildings;},\n%note = {Consequential;Data gap;Levels of analysis;Multi-level analysis;Multilevels;Multistory;Social benefits;Social impact;Social life;Social life cycle assessment;},\nURL = {http://dx.doi.org/10.1016/j.jclepro.2022.131666},\n} \n\n\n
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Building is affiliated with much of the social impact and benefits. However, for long term assessments that can capture indirect consequences, the current common attributional approach is lacking. The challenge become more obvious with large data amounts required to perform social life cycle assessment (S-LCA), and often less representative non site-specific data must be used to fill data gaps. To address above-mentioned problem, this paper presents a multilevel analysis in consequential S-LCA to further demonstrate the added value of such evaluation on addressing the existing data gaps by integrating the four level of analysis: unit process, company, sector and country. The methodology used is multilevel assessment on these four levels performed to five stakeholder of worker, local community, user, society and supplier. The case study used to demonstrate this is a multistorey building that has long supply chain from local, regional and abroad. The results show that using multilevel could help to fill the data gaps. For example, with multilevel analysis, material company or activities could fill at least 14 of the 24 social indicators through company's assessment. If it was only performed on one level, the indicators that can be assessed is lesser. Even though more data is not necessarily better but it can broaden the view to understand the potential hotspot of social impact/benefit and the sphere of its influence to the stakeholders. From consequential point of view, it also shows that for a long term, a decision of constructing more hybrid multistory building will be closely related to some social impacts and benefits in different level, different product life cycle and in different geographical area that cannot be captured with single level of analysis.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Stability and accuracy of the weakly compressible SPH with particle regularization techniques.\n \n \n \n \n\n\n \n Jandaghian, M.; Siaben, H. M.; and Shakibaeinia, A.\n\n\n \n\n\n\n European Journal of Mechanics, B/Fluids, 94: 314 - 333. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"StabilityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221611976168 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Stability and accuracy of the weakly compressible SPH with particle regularization techniques},\njournal = {European Journal of Mechanics, B/Fluids},\nauthor = {Jandaghian, Mojtaba and Siaben, Herman Musumari and Shakibaeinia, Ahmad},\nvolume = {94},\nyear = {2022},\npages = {314 - 333},\nissn = {09977546},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper proposes and validates two new particle regularization techniques for the Smoothed Particle Hydrodynamics (SPH) numerical method to improve its stability and accuracy for free surface flow simulations. We introduce a general form of the Dynamic pair-wise Particle Collision (DPC) regularization technique that we recently proposed in the context of the Moving Particle Semi-implicit (MPS) method in Jandaghian et al. (2021). The DPC coupled with the standard Particle Shifting (PS) technique has given rise to a hybrid approach that we propose to alleviate particle clustering issues in the free-surface and splashed regions. We validate the proposed techniques to four benchmark cases: (i) the oscillating droplet, (ii) the two-dimensional water dam-break, (iii) the two-dimensional water sloshing, and (iv) the three-dimensional water dam break against a rigid obstacle. We evaluate their impacts on the stability, accuracy and the conservation properties of the test cases. The qualitative and quantitative analysis of the results shows that despite its simplicity, the DPC technique is more effective in reducing the spatial disorder and capturing the impact events compared with the standard and the newly improved hybrid PS methods. Although the hybrid PS technique improves particle distribution at the free surface, it still suffers from the inconsistent implementation of the PS equation which unphysically increases the fluid volume and violates the conservation of potential energy in the long-term simulations. Overall, the conservative DPC algorithm proves to be a simple and efficient alternative regularization technique for simulating such highly dynamic free-surface flows.<br/></div> © 2022 Elsevier Masson SAS},\nkey = {Stability},\n%keywords = {Potential energy;Numerical methods;Hydrodynamics;Fuel sloshing;},\n%note = {Dynamic particle collision;Free-surface flow;Numerical stability and convergence;Particle regularization technique;Particles collisions;Regularization technique;Smoothed particle hydrodynamics;Stability and convergence;Violent free-surface flow;Weakly-compressible smoothed particle hydrodynamic;},\nURL = {http://dx.doi.org/10.1016/j.euromechflu.2022.03.007},\n} \n\n\n
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This paper proposes and validates two new particle regularization techniques for the Smoothed Particle Hydrodynamics (SPH) numerical method to improve its stability and accuracy for free surface flow simulations. We introduce a general form of the Dynamic pair-wise Particle Collision (DPC) regularization technique that we recently proposed in the context of the Moving Particle Semi-implicit (MPS) method in Jandaghian et al. (2021). The DPC coupled with the standard Particle Shifting (PS) technique has given rise to a hybrid approach that we propose to alleviate particle clustering issues in the free-surface and splashed regions. We validate the proposed techniques to four benchmark cases: (i) the oscillating droplet, (ii) the two-dimensional water dam-break, (iii) the two-dimensional water sloshing, and (iv) the three-dimensional water dam break against a rigid obstacle. We evaluate their impacts on the stability, accuracy and the conservation properties of the test cases. The qualitative and quantitative analysis of the results shows that despite its simplicity, the DPC technique is more effective in reducing the spatial disorder and capturing the impact events compared with the standard and the newly improved hybrid PS methods. Although the hybrid PS technique improves particle distribution at the free surface, it still suffers from the inconsistent implementation of the PS equation which unphysically increases the fluid volume and violates the conservation of potential energy in the long-term simulations. Overall, the conservative DPC algorithm proves to be a simple and efficient alternative regularization technique for simulating such highly dynamic free-surface flows.
© 2022 Elsevier Masson SAS\n
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\n \n\n \n \n \n \n \n \n Multihazard Performance-Based Assessment Framework for Multistory Steel Buildings.\n \n \n \n \n\n\n \n Athanasiou, A.; Dakour, M.; Pejmanfar, S.; Tirca, L.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 148(6). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"MultihazardPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221511943904 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Multihazard Performance-Based Assessment Framework for Multistory Steel Buildings},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Athanasiou, Anastasia and Dakour, Mohamad and Pejmanfar, Siamak and Tirca, Lucia and Stathopoulos, Ted},\nvolume = {148},\nnumber = {6},\nyear = {2022},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">The paper proposes a uniform multihazard performance-based design framework for multistory steel buildings. Damage of structural and nonstructural components is associated with interstory drifts, residual drifts, and floor acceleration thresholds. Predefined measures that are meaningful to stakeholders, e.g., repair costs, are used to assess the performance of the building subjected to independent winds and earthquakes. The novelty of the procedure lies in: (1) developing a multihazard assessment methodology for buildings subjected to earthquake and wind, where both events are critical, (2) assessing the margin of safety for multi-story concentrically braced frame (CBF) buildings subjected to wind, using wind tunnel data for the simulation of case specific wind histories, and (3) evaluating the economic losses caused by multihazard damage, when allowing for controlled inelastic deformations of the CBF braces under wind excitations in moderate seismic regions. The implementation of response history analysis at the design level and beyond, combined with the probabilistic estimation of non-collapse losses, reduces significantly the conservatism in prescriptive wind design and promotes resilience under multihazard excitations.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Wind tunnels},\n%keywords = {Buildings;Damage detection;Earthquakes;Losses;Seismic design;Structural analysis;Structural frames;},\n%note = {Concentrically braced frames;Design frameworks;Economic loss;Multi-hazards;Non-linear dynamic analysis;Non-structural components;Performance based design;Performance-based assessment;Steel buildings;Structural component;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0003331},\n} \n\n\n
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The paper proposes a uniform multihazard performance-based design framework for multistory steel buildings. Damage of structural and nonstructural components is associated with interstory drifts, residual drifts, and floor acceleration thresholds. Predefined measures that are meaningful to stakeholders, e.g., repair costs, are used to assess the performance of the building subjected to independent winds and earthquakes. The novelty of the procedure lies in: (1) developing a multihazard assessment methodology for buildings subjected to earthquake and wind, where both events are critical, (2) assessing the margin of safety for multi-story concentrically braced frame (CBF) buildings subjected to wind, using wind tunnel data for the simulation of case specific wind histories, and (3) evaluating the economic losses caused by multihazard damage, when allowing for controlled inelastic deformations of the CBF braces under wind excitations in moderate seismic regions. The implementation of response history analysis at the design level and beyond, combined with the probabilistic estimation of non-collapse losses, reduces significantly the conservatism in prescriptive wind design and promotes resilience under multihazard excitations.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Investigating the role of surface engineering in mitigating greenhouse gas emissions of energy technologies: An outlook towards 2100.\n \n \n \n \n\n\n \n Kaddoura, M.; Majeau-Bettez, G.; Amor, B.; Moreau, C.; and Margni, M.\n\n\n \n\n\n\n Sustainable Materials and Technologies, 32. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"InvestigatingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221511940669 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigating the role of surface engineering in mitigating greenhouse gas emissions of energy technologies: An outlook towards 2100},\njournal = {Sustainable Materials and Technologies},\nauthor = {Kaddoura, Mohamad and Majeau-Bettez, Guillaume and Amor, Ben and Moreau, Christian and Margni, Manuele},\nvolume = {32},\nyear = {2022},\nissn = {22149937},\nabstract = {<div data-language="eng" data-ev-field="abstract">Energy improvements in the energy sector constitute a key strategy to mitigate climate change. These expected improvements increasingly depend on the development of materials with improved surface characteristics. To prospectively assess the large-scale benefits and trade-offs of such novel surface engineering (SE) technology deployments in the energy sector, an integrated modelling framework is proposed. This paper links an integrated assessment model (IAM) forecasting socio-economic changes in energy supply with life cycle assessment (LCA) models of targeted technology candidates. Different shared socio-economic pathway narratives are used with the MESSAGE IAM to forecast future energy supply scenarios. A dynamic vintage model is employed to model plants decommissioning and adoption rates of innovative SE. Potential benefits and impacts of SE are assessed through prospective LCA. The approach is used to estimate the prospective GHG emission reduction potential achieved by large-scale adoption of innovative SE technologies to improve the efficiency of four energy conversion technologies (coal power plants, gas turbines, wind turbines and solar panels) until 2100. Applying innovative SE technologies to the energy sector has the potential of reducing annual CO2-eq emissions by 1.8 Gt in 2050 and 3.4 Gt in 2100 in an optimistic socio-economic pathway scenario. This corresponds to 7% and 8.5% annual reduction in the energy sector in 2050 and 2100, respectively. The mitigation potential of applying innovative SE technologies highly depends on the energy technology, the socio-economic pathways, and the implementation of stringent GHG mitigation policies. Due to their high carbon intensity, fossil-based technologies showed a higher GHG mitigation potential compared to renewables. Besides, GHG emissions related to the SE processes are largely offset by the GHG savings of the energy conversion technologies where the innovative SE technologies are applied.<br/></div> © 2022 Elsevier B.V.},\nkey = {Economic and social effects},\n%keywords = {Gas plants;Life cycle;Thermal Engineering;Emission control;Energy policy;Energy conversion;Energy resources;Greenhouse gases;Climate change;Gas emissions;Gas turbines;},\n%note = {Efficiency improvement;Energy sector;Energy supplies;Energy systems;Energy technologies;Hydrophobic coatings;Integrated assessment models;Large-scales;Socio-economics;Surface engineering;},\nURL = {http://dx.doi.org/10.1016/j.susmat.2022.e00425},\n} \n\n\n
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Energy improvements in the energy sector constitute a key strategy to mitigate climate change. These expected improvements increasingly depend on the development of materials with improved surface characteristics. To prospectively assess the large-scale benefits and trade-offs of such novel surface engineering (SE) technology deployments in the energy sector, an integrated modelling framework is proposed. This paper links an integrated assessment model (IAM) forecasting socio-economic changes in energy supply with life cycle assessment (LCA) models of targeted technology candidates. Different shared socio-economic pathway narratives are used with the MESSAGE IAM to forecast future energy supply scenarios. A dynamic vintage model is employed to model plants decommissioning and adoption rates of innovative SE. Potential benefits and impacts of SE are assessed through prospective LCA. The approach is used to estimate the prospective GHG emission reduction potential achieved by large-scale adoption of innovative SE technologies to improve the efficiency of four energy conversion technologies (coal power plants, gas turbines, wind turbines and solar panels) until 2100. Applying innovative SE technologies to the energy sector has the potential of reducing annual CO2-eq emissions by 1.8 Gt in 2050 and 3.4 Gt in 2100 in an optimistic socio-economic pathway scenario. This corresponds to 7% and 8.5% annual reduction in the energy sector in 2050 and 2100, respectively. The mitigation potential of applying innovative SE technologies highly depends on the energy technology, the socio-economic pathways, and the implementation of stringent GHG mitigation policies. Due to their high carbon intensity, fossil-based technologies showed a higher GHG mitigation potential compared to renewables. Besides, GHG emissions related to the SE processes are largely offset by the GHG savings of the energy conversion technologies where the innovative SE technologies are applied.
© 2022 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Large displacement analysis of stiffened plates with parallel ribs under lateral pressure using FE modeling with shell elements.\n \n \n \n \n\n\n \n Rezaiefar, A.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 259. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"LargePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221411923988 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Large displacement analysis of stiffened plates with parallel ribs under lateral pressure using FE modeling with shell elements},\njournal = {Engineering Structures},\nauthor = {Rezaiefar, Ali and Galal, Khaled},\nvolume = {259},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study provides the load–displacement behavior of stiffened plates with parallel ribs when modeled using shell elements with and without considering the large-displacement effects in comparison with the conventional equivalent beam analysis (EBA) in which such stiffened plates are simplified into an imaginary beam with the geometrical properties of an equivalent built-up cross-section. This study highlights the advantages of FE modeling with shell elements and large-displacement analysis (LDA) over the existing EBA method and then provides a path for using this method in the ultimate limit state (ULS) design of stiffened plates. The stress distributions in the panel plate part of the stiffened plates are presented to demonstrate the significance of considering the large-displacement effects in the analysis. The numerical investigation indicated that the linear beam theory does not correctly presume the true behavior of the stiffened plates and that the corresponding load–displacement estimation does not align with its behavior predicted by the LDA. The results also demonstrate that when shell element modeling is utilized, the internal forces and stresses in the panel plate are calculated correctly, only if the large-displacement effects are considered in the analysis. Finally, a method for estimating the ultimate load capacity of stiffened plates with parallel ribs is provided, based on the large-displacement FE analysis with shell elements, which can be used to establish empirical design equations.<br/></div> © 2022 Elsevier Ltd},\nkey = {Shells (structures)},\n%keywords = {Plates (structural components);Finite element method;},\n%note = {Equivalent beams;F.E. analysis;FE analysis;FE modeling;FE-modelling;Large displacement analysis;Large displacements;Shell element;Stiffened plate;Ultimate limit state design;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.114125},\n} \n\n\n
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This study provides the load–displacement behavior of stiffened plates with parallel ribs when modeled using shell elements with and without considering the large-displacement effects in comparison with the conventional equivalent beam analysis (EBA) in which such stiffened plates are simplified into an imaginary beam with the geometrical properties of an equivalent built-up cross-section. This study highlights the advantages of FE modeling with shell elements and large-displacement analysis (LDA) over the existing EBA method and then provides a path for using this method in the ultimate limit state (ULS) design of stiffened plates. The stress distributions in the panel plate part of the stiffened plates are presented to demonstrate the significance of considering the large-displacement effects in the analysis. The numerical investigation indicated that the linear beam theory does not correctly presume the true behavior of the stiffened plates and that the corresponding load–displacement estimation does not align with its behavior predicted by the LDA. The results also demonstrate that when shell element modeling is utilized, the internal forces and stresses in the panel plate are calculated correctly, only if the large-displacement effects are considered in the analysis. Finally, a method for estimating the ultimate load capacity of stiffened plates with parallel ribs is provided, based on the large-displacement FE analysis with shell elements, which can be used to establish empirical design equations.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Risk-Based Optimal Design of Seismic Protective Devices for a Multicomponent Bridge System Using Parameterized Annual Repair Cost Ratio.\n \n \n \n \n\n\n \n Ning, C.; and Xie, Y.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 148(5). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"Risk-BasedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221311860014 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Risk-Based Optimal Design of Seismic Protective Devices for a Multicomponent Bridge System Using Parameterized Annual Repair Cost Ratio},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Ning, Chunxiao and Xie, Yazhou},\nvolume = {148},\nnumber = {5},\nyear = {2022},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">Base isolators and fluid viscous dampers are viable protective devices that have been commonly considered in the seismic protection of civil engineering structures. However, the optimal design of these devices remains a tedious and iterative undertaking due to the uncertainty of ground motions, the nonlinear behavior of the structure, and its change of dynamic characteristics (i.e., effective stiffness and damping ratio) under each new design. The optimal design problem becomes more challenging concerning a multiresponse bridge system where conflicting damage potential is often expected among multiple bridge components (e.g., column, bearing, shear key, deck unseating, foundation). In this respect, this study develops a risk-based optimization strategy that directly links the expected annual repair cost ratio (ARCR) of the bridge to the design parameters of base isolators and fluid dampers. This strategy is achieved by devising a multistep workflow that integrates a seismic hazard model, a design of experiment for bearings and dampers, a logistic regression towards parameterized component-level fragility models, and a bridge system-level seismic loss assessment. The developed ARCR is parameterized as a convex function of the influential parameters of seismic protective devices. As such, optimal bearing and damper designs can be pinpointed by directly visualizing the global minimum of the parameterized ARCR surface. The optimal design is carried out against a typical reinforced concrete highway bridge in California that is installed with the fluid dampers and three types of widely-used isolation bearings - the elastomeric bearing, lead-rubber bearing, and friction pendulum system. It is shown that optimal design parameters can be obtained to significantly reduce the expected ARCR of the bridge, whereas combining optimally designed bearings and dampers can provide the minimum seismic risk.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Reinforced concrete},\n%keywords = {Global optimization;Repair;Bayesian networks;Bearings (machine parts);Budget control;Design of experiments;Pendulums;Bridges;Functions;Risk analysis;Seismic design;Optimal systems;Bearings (structural);Cost benefit analysis;Risk assessment;Seismology;},\n%note = {Annual repair cost ratio;Cost ratio;Isolation bearings;Optimal design;Parameterized;Protective devices;Repair costs;Seismic risk;Seismic risk analyse;Viscous dampers;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0003330},\n} \n\n\n
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Base isolators and fluid viscous dampers are viable protective devices that have been commonly considered in the seismic protection of civil engineering structures. However, the optimal design of these devices remains a tedious and iterative undertaking due to the uncertainty of ground motions, the nonlinear behavior of the structure, and its change of dynamic characteristics (i.e., effective stiffness and damping ratio) under each new design. The optimal design problem becomes more challenging concerning a multiresponse bridge system where conflicting damage potential is often expected among multiple bridge components (e.g., column, bearing, shear key, deck unseating, foundation). In this respect, this study develops a risk-based optimization strategy that directly links the expected annual repair cost ratio (ARCR) of the bridge to the design parameters of base isolators and fluid dampers. This strategy is achieved by devising a multistep workflow that integrates a seismic hazard model, a design of experiment for bearings and dampers, a logistic regression towards parameterized component-level fragility models, and a bridge system-level seismic loss assessment. The developed ARCR is parameterized as a convex function of the influential parameters of seismic protective devices. As such, optimal bearing and damper designs can be pinpointed by directly visualizing the global minimum of the parameterized ARCR surface. The optimal design is carried out against a typical reinforced concrete highway bridge in California that is installed with the fluid dampers and three types of widely-used isolation bearings - the elastomeric bearing, lead-rubber bearing, and friction pendulum system. It is shown that optimal design parameters can be obtained to significantly reduce the expected ARCR of the bridge, whereas combining optimally designed bearings and dampers can provide the minimum seismic risk.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Numerical and full-scale test case studies on post-elastic performance of transmission towers.\n \n \n \n \n\n\n \n Li, J.; Zhang, X.; and McClure, G.\n\n\n \n\n\n\n Engineering Structures, 259. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221211830389 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical and full-scale test case studies on post-elastic performance of transmission towers},\njournal = {Engineering Structures},\nauthor = {Li, Jia-Xiang and Zhang, Xiao-Hong and McClure, Ghyslaine},\nvolume = {259},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Post-elastic capacity of transmission tower is critical for the realistic assessment of tower vulnerability under the extreme loading conditions. This paper first presented a series of numerical simulations of a lattice transmission tower section under torsional (longitudinal) or bending (transverse) loading in both static and dynamic scenarios. From the results of the numerical simulations, four prototypes of lattice transmission towers were constructed and tested for the investigation of the post-elastic performances of the towers under different loading conditions. The tests results showed that there existed significant post-elastic strength reserve of the tower under investigation. For the towers tested in this research, the post-elastic strength reserve was 1.22 for flexure-torsion (i.e. tower under longitudinal loading) governed by diagonals, and 1.37 for bending (i.e. tower in transverse loading) governed by inelastic buckling of the main legs. Diagonal members affected the failure modes of transmission towers and their connection design may be a weak link in the development of their post-elastic capacity.<br/></div> © 2022 Elsevier Ltd},\nkey = {Towers},\n%keywords = {Numerical models;Transmissions;Torsional stress;},\n%note = {Case-studies;Extreme loadings;Full scale tests;Loading condition;Performance;Post-elastic performance;Pushover;Test case;Transmission tower;Transverse loading;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.114133},\n} \n\n\n
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Post-elastic capacity of transmission tower is critical for the realistic assessment of tower vulnerability under the extreme loading conditions. This paper first presented a series of numerical simulations of a lattice transmission tower section under torsional (longitudinal) or bending (transverse) loading in both static and dynamic scenarios. From the results of the numerical simulations, four prototypes of lattice transmission towers were constructed and tested for the investigation of the post-elastic performances of the towers under different loading conditions. The tests results showed that there existed significant post-elastic strength reserve of the tower under investigation. For the towers tested in this research, the post-elastic strength reserve was 1.22 for flexure-torsion (i.e. tower under longitudinal loading) governed by diagonals, and 1.37 for bending (i.e. tower in transverse loading) governed by inelastic buckling of the main legs. Diagonal members affected the failure modes of transmission towers and their connection design may be a weak link in the development of their post-elastic capacity.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n O.I.C.-based design of mono-symmetric I-sections under simple load cases.\n \n \n \n \n\n\n \n Li, L.; Gerard, L.; Langlois, S.; and Boissonnade, N.\n\n\n \n\n\n\n Thin-Walled Structures, 174. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"O.I.C.-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221211830494 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {O.I.C.-based design of mono-symmetric I-sections under simple load cases},\njournal = {Thin-Walled Structures},\nauthor = {Li, Liya and Gerard, Lucile and Langlois, Sebastien and Boissonnade, Nicolas},\nvolume = {174},\nyear = {2022},\nissn = {02638231},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper studies the ultimate resistance of mono-symmetric hot-rolled and welded sections under axial compression, major-axis bending or minor-axis bending as affected by local buckling and material yielding. Following the development of advanced non-linear shell finite element models and their validation against existing test data, extensive non-linear numerical analyses are carried out. Various parameters including two manufacturing types, three steel grades and various section dimensions are considered, to investigate the influence of mono-symmetric levels with various flange widths ratios b<inf>1</inf>/b<inf>2</inf> on section behaviour. The numerical results are then used to assess a proposed extension of the Overall Interaction Concept (O.I.C.) to mono-symmetric I-shaped sections. Systematic comparisons with existing standards – Eurocode 3 and the American Standards – and the proposed O.I.C.-based method prove the new approach to be more consistent, accurate and straightforward.<br/></div> © 2022},\nkey = {Hot rolling},\n%keywords = {Buckling;Hot rolled steel;},\n%note = {Concept-based;I-sections;Interaction concepts;Local buckling;Mono-symmetric I-section;Overall interaction concept;Simple loading;Simple loading case;Simple++;Symmetrics;},\nURL = {http://dx.doi.org/10.1016/j.tws.2022.109134},\n} \n\n\n
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This paper studies the ultimate resistance of mono-symmetric hot-rolled and welded sections under axial compression, major-axis bending or minor-axis bending as affected by local buckling and material yielding. Following the development of advanced non-linear shell finite element models and their validation against existing test data, extensive non-linear numerical analyses are carried out. Various parameters including two manufacturing types, three steel grades and various section dimensions are considered, to investigate the influence of mono-symmetric levels with various flange widths ratios b1/b2 on section behaviour. The numerical results are then used to assess a proposed extension of the Overall Interaction Concept (O.I.C.) to mono-symmetric I-shaped sections. Systematic comparisons with existing standards – Eurocode 3 and the American Standards – and the proposed O.I.C.-based method prove the new approach to be more consistent, accurate and straightforward.
© 2022\n
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\n \n\n \n \n \n \n \n \n An efficient numerical approach for simulating soil-pipe interaction behaviour under cyclic loading.\n \n \n \n \n\n\n \n Saberi, M.; Annan, C.; and Sheil, B. B.\n\n\n \n\n\n\n Computers and Geotechnics, 146. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221211829948 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An efficient numerical approach for simulating soil-pipe interaction behaviour under cyclic loading},\njournal = {Computers and Geotechnics},\nauthor = {Saberi, Miad and Annan, Charles-Darwin and Sheil, Brian B.},\nvolume = {146},\nyear = {2022},\nissn = {0266352X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Understanding soil-pipe interaction during cyclic axial displacement is essential for the design and evaluation of buried pipeline systems. This study introduces an efficient and practical numerical approach using beam-spring-interface elements to simulate soil-pipe interaction behaviour. Numerical predictions of the evolution of shear and normal stress distributions around the pipe are validated against full-scale experimental results for steel and high-density polyethylene pipes buried in sandy soils. Three different backfill cover depths and soil densities ranging between loose and dense were considered to allow a rigorous comparison between the numerical predictions and the experimental results. The results show that the proposed approach provides a high-fidelity representation of the complex soil-pipe interaction behaviour at the interface zones, including stress cyclic degradation, hardening and softening, cyclic accumulative contraction and stabilization. This numerical framework provides accurate predictions for a fraction of the computational cost of a full three-dimensional finite element analysis.<br/></div> © 2022 Elsevier Ltd},\nkey = {Forecasting},\n%keywords = {Pipelines;Soil structure interactions;Soils;Stabilization;},\n%note = {Axial displacements;Buried pipelines;Cyclic axial loading;Design and evaluations;Experimental validations;Interaction behavior;Numerical approaches;Numerical predictions;Soil structure interface;Soil-pipe interaction;},\nURL = {http://dx.doi.org/10.1016/j.compgeo.2022.104666},\n} \n\n\n
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Understanding soil-pipe interaction during cyclic axial displacement is essential for the design and evaluation of buried pipeline systems. This study introduces an efficient and practical numerical approach using beam-spring-interface elements to simulate soil-pipe interaction behaviour. Numerical predictions of the evolution of shear and normal stress distributions around the pipe are validated against full-scale experimental results for steel and high-density polyethylene pipes buried in sandy soils. Three different backfill cover depths and soil densities ranging between loose and dense were considered to allow a rigorous comparison between the numerical predictions and the experimental results. The results show that the proposed approach provides a high-fidelity representation of the complex soil-pipe interaction behaviour at the interface zones, including stress cyclic degradation, hardening and softening, cyclic accumulative contraction and stabilization. This numerical framework provides accurate predictions for a fraction of the computational cost of a full three-dimensional finite element analysis.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Numerical & experimental investigation of slotted-hidden-gap connection for square HSS brace members.\n \n \n \n \n\n\n \n Afifi, M.; Tremblay, R.; and Rogers, C. A.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 192. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221111793010 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical & experimental investigation of slotted-hidden-gap connection for square HSS brace members},\njournal = {Journal of Constructional Steel Research},\nauthor = {Afifi, Mohamed and Tremblay, Robert and Rogers, Colin A.},\nvolume = {192},\nyear = {2022},\nissn = {0143974X},\nabstract = {<div data-language="eng" data-ev-field="abstract">The Slotted-Hidden-Gap (SHG) connection represents an attractive alternative to the conventional knife plate connection for HSS braces of steel braced frames as it allows the brace to yield along its length without having to reinforce the connection. Prior studies have proven the effectiveness of this detail for circular and square HSS braces. However, no encompassing seismic design method or detailing rules exist for SHG square HSS members. To gain deeper insight into the behaviour of the SHG connection, a preliminary numerical parametric study of square HSS braces under a monotonic tension loading protocol was done to further investigate key factors influencing the connection's performance. The weld size and length as well as the gusset plate thickness are critical in the design of SHG connections and may hinder the connection performance if poorly designed or fabricated. A laboratory testing program, of four SHG HSS ASTM A1085 (254 × 254 × 13) brace specimens with different weld configurations, was also carried out. Keeping a 20 mm overlap length despite changing the overall weld size and length was sufficient to develop the yield resistance of the braces and to force fracture away from the connection region. Utilizing longer length smaller sized welds granted an additional 3.1% of brace strains compared to connections with shorter welds.<br/></div> © 2022 Elsevier Ltd},\nkey = {Welds},\n%keywords = {Software testing;Plates (structural components);Steel testing;Welding;Seismic design;Testing;Structural frames;},\n%note = {Experimental investigations;HSS;Knife plates;Laboratory testing;Numerical experimental;Numerical investigations;Performance;Steel braces;Weld size;Welded connections;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2022.107234},\n} \n\n\n
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The Slotted-Hidden-Gap (SHG) connection represents an attractive alternative to the conventional knife plate connection for HSS braces of steel braced frames as it allows the brace to yield along its length without having to reinforce the connection. Prior studies have proven the effectiveness of this detail for circular and square HSS braces. However, no encompassing seismic design method or detailing rules exist for SHG square HSS members. To gain deeper insight into the behaviour of the SHG connection, a preliminary numerical parametric study of square HSS braces under a monotonic tension loading protocol was done to further investigate key factors influencing the connection's performance. The weld size and length as well as the gusset plate thickness are critical in the design of SHG connections and may hinder the connection performance if poorly designed or fabricated. A laboratory testing program, of four SHG HSS ASTM A1085 (254 × 254 × 13) brace specimens with different weld configurations, was also carried out. Keeping a 20 mm overlap length despite changing the overall weld size and length was sufficient to develop the yield resistance of the braces and to force fracture away from the connection region. Utilizing longer length smaller sized welds granted an additional 3.1% of brace strains compared to connections with shorter welds.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Air-core vortex formation in a draining reservoir using smoothed-particle hydrodynamics (SPH).\n \n \n \n \n\n\n \n Azarpira, M.; Zarrati, A.; Farokhzad, P.; and Shakibaeinia, A.\n\n\n \n\n\n\n Physics of Fluids, 34(3). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"Air-corePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221211804404 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Air-core vortex formation in a draining reservoir using smoothed-particle hydrodynamics (SPH)},\njournal = {Physics of Fluids},\nauthor = {Azarpira, M. and Zarrati, A.R. and Farokhzad, P. and Shakibaeinia, A.},\nvolume = {34},\nnumber = {3},\nyear = {2022},\nissn = {10706631},\nabstract = {<div data-language="eng" data-ev-field="abstract">Vortex formation under unsteady flow conditions in a draining reservoir is studied. Considering the capabilities of mesh-free Lagrangian numerical methods in the simulation of highly deformed free surfaces, the smoothed-particle hydrodynamics approach is employed. The results of this numerical model are validated with the experimental data of the current study, including the depth over the intake at which vortex forms (critical submergence) and the velocity field. Experiments were also conducted in a rotating cylinder while water was draining from an outlet at its bottom center. The particle image velocimetry technique was used for measuring the velocity field in planes perpendicular to the vortex axis. The numerical results including the velocity distribution and water level variations as well as the depth at which an air-core forms were in acceptable agreement with the experimental data. In addition, vortex formation and the corresponding velocity and pressure distribution as well as the streamlines are analyzed based on the numerical results. The results indicate that as the flow depth decreases, high values of vorticity and low pressures are generated at the vicinity of the outlet, and over time, the generated vorticity develops in depth toward the free surface, and an air-core vortex forms.<br/></div> © 2022 Author(s).},\nkey = {Vorticity},\n%keywords = {Velocity;Vortex flow;Air;Velocity distribution;Water levels;Hydrodynamics;Velocity measurement;Numerical methods;Reservoirs (water);},\n%note = {'current;Air-core;Flow condition;Free surfaces;Lagrangian numerical method;Meshfree;Numerical results;Smoothed particle hydrodynamics;Velocity field;Vortex formation;},\nURL = {http://dx.doi.org/10.1063/5.0077083},\n} \n\n\n
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Vortex formation under unsteady flow conditions in a draining reservoir is studied. Considering the capabilities of mesh-free Lagrangian numerical methods in the simulation of highly deformed free surfaces, the smoothed-particle hydrodynamics approach is employed. The results of this numerical model are validated with the experimental data of the current study, including the depth over the intake at which vortex forms (critical submergence) and the velocity field. Experiments were also conducted in a rotating cylinder while water was draining from an outlet at its bottom center. The particle image velocimetry technique was used for measuring the velocity field in planes perpendicular to the vortex axis. The numerical results including the velocity distribution and water level variations as well as the depth at which an air-core forms were in acceptable agreement with the experimental data. In addition, vortex formation and the corresponding velocity and pressure distribution as well as the streamlines are analyzed based on the numerical results. The results indicate that as the flow depth decreases, high values of vorticity and low pressures are generated at the vicinity of the outlet, and over time, the generated vorticity develops in depth toward the free surface, and an air-core vortex forms.
© 2022 Author(s).\n
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\n \n\n \n \n \n \n \n \n Shear performance of basalt fiber-reinforced concrete beams reinforced with BFRP bars.\n \n \n \n \n\n\n \n El Refai, A.; Alnahhal, W.; Al-Hamrani, A.; and Hamed, S.\n\n\n \n\n\n\n Composite Structures, 288. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ShearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221011769417 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shear performance of basalt fiber-reinforced concrete beams reinforced with BFRP bars},\njournal = {Composite Structures},\nauthor = {El Refai, Ahmed and Alnahhal, Wael and Al-Hamrani, Abathar and Hamed, Sarah},\nvolume = {288},\nyear = {2022},\nissn = {02638223},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper reports on the experimental and analytical investigation of the shear performance of concrete beams cast with basalt fiber-reinforced concrete (BFRC) and longitudinally reinforced with basalt fiber-reinforced polymer (BFRP) bars. Fourteen hybrid (BFRC-BFRP) beams with no stirrups were tested to failure under a four-point loading setup. The investigated parameters included the volume fraction, V<inf>f</inf>, of the added fibers (0.75 and 1.5%), the reinforcement ratio of the BFRP bars,ρ, (0.31, 0.48, 0.69, 1.05, and 1.52%), and the shear span-to-depth ratios, a/d, of the beams (3.3 and 2.5 for slender and short beams, respectively). The tests results showed that adding 0.75% of basalt macrofibres (BMF) improved the shear capacity of the slender and short beams by 46 and 43 %, respectively, compared to 81 and 82% when 1.5% of BMF were added. The impact of adding the BMF on the shear strength of the beams diminished as the longitudinal reinforcement ratios increased. The existing models overestimated the shear strength of the tested beams with an average predicted-to-experimental ratio ranging between 1.15 ± 0.03 and 2.48 ± 0.29. A shear model that accounts for the type of the longitudinal reinforcement and the added fibers was proposed to predict the shear strength of the BFRC-BFRP beams. A good agreement between the predicted and experimental shear strength was evident with a predicted-to-experimental ratio that ranged between 0.98 ± 0.11 and 0.88 ± 0.02 for the slender and short beams, respectively.<br/></div> © 2022 The Authors},\nkey = {Basalt},\n%keywords = {Concrete beams and girders;Fiber reinforced plastics;Reinforced concrete;Fibers;},\n%note = {Basalt fiber;Basalt fiber reinforced concretes;Basalt fiber-reinforced polymer bar;Fiber-reinforced polymers;Fibre reinforced polymers;Shear;Shears strength;Short beams;Slender beams;},\nURL = {http://dx.doi.org/10.1016/j.compstruct.2022.115443},\n} \n\n\n
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This paper reports on the experimental and analytical investigation of the shear performance of concrete beams cast with basalt fiber-reinforced concrete (BFRC) and longitudinally reinforced with basalt fiber-reinforced polymer (BFRP) bars. Fourteen hybrid (BFRC-BFRP) beams with no stirrups were tested to failure under a four-point loading setup. The investigated parameters included the volume fraction, Vf, of the added fibers (0.75 and 1.5%), the reinforcement ratio of the BFRP bars,ρ, (0.31, 0.48, 0.69, 1.05, and 1.52%), and the shear span-to-depth ratios, a/d, of the beams (3.3 and 2.5 for slender and short beams, respectively). The tests results showed that adding 0.75% of basalt macrofibres (BMF) improved the shear capacity of the slender and short beams by 46 and 43 %, respectively, compared to 81 and 82% when 1.5% of BMF were added. The impact of adding the BMF on the shear strength of the beams diminished as the longitudinal reinforcement ratios increased. The existing models overestimated the shear strength of the tested beams with an average predicted-to-experimental ratio ranging between 1.15 ± 0.03 and 2.48 ± 0.29. A shear model that accounts for the type of the longitudinal reinforcement and the added fibers was proposed to predict the shear strength of the BFRC-BFRP beams. A good agreement between the predicted and experimental shear strength was evident with a predicted-to-experimental ratio that ranged between 0.98 ± 0.11 and 0.88 ± 0.02 for the slender and short beams, respectively.
© 2022 The Authors\n
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\n \n\n \n \n \n \n \n \n Deterioration Mapping of RC Bridge Elements Based on Automated Analysis of GPR Images.\n \n \n \n \n\n\n \n Rahman, M. A.; Zayed, T.; and Bagchi, A.\n\n\n \n\n\n\n Remote Sensing, 14(5). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"DeteriorationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221011752248 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Deterioration Mapping of RC Bridge Elements Based on Automated Analysis of GPR Images},\njournal = {Remote Sensing},\nauthor = {Rahman, Mohammed Abdul and Zayed, Tarek and Bagchi, Ashutosh},\nvolume = {14},\nnumber = {5},\nyear = {2022},\nissn = {20724292},\nabstract = {<div data-language="eng" data-ev-field="abstract">Ground-Penetrating Radar (GPR) is a popular non-destructive technique for evaluating RC bridge elements as it can identify major subsurface defects within a short span of time. The data interpretation of the GPR profiles based on existing amplitude-based approaches is not completely reliable when compared to the actual condition of concrete with destructive measures. An alternative image-based analysis considers GPR as an imaging tool wherein an experienced analyst marks attenuated areas and generates deterioration maps with greater accuracy. However, this approach is prone to human errors and is highly subjective. The proposed model aims to improve it through automated detection of hyperbolas in GPR profiles and classification based on mathematical modeling. Firstly, GPR profiles are pre-processed, and hyperbolic reflections were detected in them based on a trained classifier using the Viola–Jones Algorithm. The false positives are eliminated, and missing regions are identified automatically across the top/bottom layer of reinforcement based on user-interactive regional comparison and statistical analysis. Subsequently, entropy, a textural factor, is evaluated to differentiate the detected regions closely equivalent to the human visual system. These detected regions are finally clustered based on entropy values using the K-means algorithm and a deterioration map is generated which is robust, reliable, and corresponds to the in situ state of concrete. A case study of a parking lot demonstrated good correspondence of deterioration maps generated by the developed model when compared with both amplitude-and image-based analysis. These maps can facilitate structural inspectors to locally identify deteriorated zones within structural elements that require immediate attention for repair and rehabilitation.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Deterioration},\n%keywords = {Automation;Geological surveys;Image analysis;K-means clustering;Entropy;Ground penetrating radar systems;Concretes;Nondestructive examination;Geophysical prospecting;},\n%note = {Automated analysis;Bridge inspection;Deterioration map;Ground Penetrating Radar;Ground-penetrating radar;K-means++ clustering;Non destructive evaluation;Non-destructive evaluation;Radar profiles;Viola - Jones algorithms;},\nURL = {http://dx.doi.org/10.3390/rs14051131},\n} \n\n\n
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Ground-Penetrating Radar (GPR) is a popular non-destructive technique for evaluating RC bridge elements as it can identify major subsurface defects within a short span of time. The data interpretation of the GPR profiles based on existing amplitude-based approaches is not completely reliable when compared to the actual condition of concrete with destructive measures. An alternative image-based analysis considers GPR as an imaging tool wherein an experienced analyst marks attenuated areas and generates deterioration maps with greater accuracy. However, this approach is prone to human errors and is highly subjective. The proposed model aims to improve it through automated detection of hyperbolas in GPR profiles and classification based on mathematical modeling. Firstly, GPR profiles are pre-processed, and hyperbolic reflections were detected in them based on a trained classifier using the Viola–Jones Algorithm. The false positives are eliminated, and missing regions are identified automatically across the top/bottom layer of reinforcement based on user-interactive regional comparison and statistical analysis. Subsequently, entropy, a textural factor, is evaluated to differentiate the detected regions closely equivalent to the human visual system. These detected regions are finally clustered based on entropy values using the K-means algorithm and a deterioration map is generated which is robust, reliable, and corresponds to the in situ state of concrete. A case study of a parking lot demonstrated good correspondence of deterioration maps generated by the developed model when compared with both amplitude-and image-based analysis. These maps can facilitate structural inspectors to locally identify deteriorated zones within structural elements that require immediate attention for repair and rehabilitation.
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Application of an Optimization Algorithm for Calibrating Soil Bounding Surface Plasticity Models for Cyclic Loading.\n \n \n \n \n\n\n \n Zarrabi, M.; Eslami, M. M.; and Yniesta, S.\n\n\n \n\n\n\n International Journal of Geomechanics, 22(5). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ApplicationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221011746731 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Application of an Optimization Algorithm for Calibrating Soil Bounding Surface Plasticity Models for Cyclic Loading},\njournal = {International Journal of Geomechanics},\nauthor = {Zarrabi, Mohammad and Eslami, Mohammad M. and Yniesta, Samuel},\nvolume = {22},\nnumber = {5},\nyear = {2022},\nissn = {15323641},\nabstract = {<div data-language="eng" data-ev-field="abstract">Advanced constitutive models require several input parameters, some of which represent intrinsic soil properties and some mathematical fitting parameters. Calibrating these modeling parameters is often a challenging component of using a constitutive model in numerical analyses, especially when models are to be calibrated against several data sets simultaneously and/or when there is no conventional geotechnical relation for some parameters. The calibration of constitutive models for cyclic loading is an even more challenging task compared with monotonic loading due to the nonlinearity of soil behavior with stress/strain reversals, amplitude, and the number of loading cycles. In this study, the efficiency of the Gauss-Newton trust-region optimization (GNO) algorithm for calibrating constitutive models for cyclic behavior is evaluated by applying it to three recently developed advanced bounding surface plasticity constitutive models for clays and sands and comparing the outcomes with laboratory test results. The GNO algorithm is shown to be an accurate and time-efficient alternative tool for calibrating the cyclic constitutive models studied.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Constitutive models},\n%keywords = {Soils;Cyclic loads;Plasticity;Soil testing;Stress analysis;},\n%note = {Bounding surface plasticity model;Fitting parameters;Gauss Newton;Gauss-newton trust-region optimization;Input parameter;Optimisations;Optimization algorithms;Soil constitutive model;Soil property;Trust region;},\nURL = {http://dx.doi.org/10.1061/(ASCE)GM.1943-5622.0002359},\n} \n\n\n
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Advanced constitutive models require several input parameters, some of which represent intrinsic soil properties and some mathematical fitting parameters. Calibrating these modeling parameters is often a challenging component of using a constitutive model in numerical analyses, especially when models are to be calibrated against several data sets simultaneously and/or when there is no conventional geotechnical relation for some parameters. The calibration of constitutive models for cyclic loading is an even more challenging task compared with monotonic loading due to the nonlinearity of soil behavior with stress/strain reversals, amplitude, and the number of loading cycles. In this study, the efficiency of the Gauss-Newton trust-region optimization (GNO) algorithm for calibrating constitutive models for cyclic behavior is evaluated by applying it to three recently developed advanced bounding surface plasticity constitutive models for clays and sands and comparing the outcomes with laboratory test results. The GNO algorithm is shown to be an accurate and time-efficient alternative tool for calibrating the cyclic constitutive models studied.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Strengthening Square and Circular Low-Strength Concrete Columns with Fiber-Reinforced Cementitious Matrix: Experimental Investigation.\n \n \n \n \n\n\n \n Abed, F.; Elrefai, A.; El-Maaddawy, T.; Tello, N.; and Alhoubi, Y.\n\n\n \n\n\n\n Practice Periodical on Structural Design and Construction, 27(2). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"StrengtheningPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220711639826 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Strengthening Square and Circular Low-Strength Concrete Columns with Fiber-Reinforced Cementitious Matrix: Experimental Investigation},\njournal = {Practice Periodical on Structural Design and Construction},\nauthor = {Abed, Farid and Elrefai, Ahmed and El-Maaddawy, Tamer and Tello, Noor and Alhoubi, Yazan},\nvolume = {27},\nnumber = {2},\nyear = {2022},\nissn = {10840680},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study investigated the efficiency of strengthening low-strength RC short columns with fiber-reinforced cementitious matrix (FRCM). Twelve columns were cast with concrete with a compressive strength of 18 MPa. All columns had a reinforcement ratio of 1.5%. The investigated parameters were the column cross section (square or circular), the spacing between the ties (90 and 180 mm) selected based on the columns' dimensions, and the number of FRCM layers used in wrapping the columns [zero, two, and four layers of paraphenylene-ben-zobisoxazole (PBO) FRCM]. All columns had a clear height of 800 mm and were tested monotonically until failure. Results showed that for columns wrapped with two PBO-FRCM layers, using a tie spacing of 90 mm eliminated the effect of varying the cross section. However, circular columns showed a higher increase in capacity than square columns for a tie spacing of 180 mm, where the increase was 40%. For all columns wrapped with four PBO-FRCM layers, the cross-section shape was the sole influence on ultimate capacity, where circular columns noticeably showed a more improved capacity. Also, column load-strain relationships were only influenced by the tie spacing. All strengthened columns showed improved ductility with the increase in PBO-FRCM layers. Using existing design provisions, the theoretical capacity of the columns was calculated, and results showed that the code underestimates ultimate capacity, where the theoretical capacities were lower than the experimental ones by 5%-20%.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Compressive strength},\n%keywords = {Fiber reinforced plastics;Reinforced concrete;Concrete construction;Columns (structural);},\n%note = {Capacity;Cementitious matrices;Concentric loading;Fiber-reinforced cementitious matrix;Fiber-reinforced polymers;Fibre reinforced polymers;Fibre-reinforced;Para-phenylenes;Paraphenylene-ben-zobisoxazole-fiber-reinforced cementitious matrix;RC column;Short column;},\nURL = {http://dx.doi.org/10.1061/(ASCE)SC.1943-5576.0000676},\n} \n\n\n
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This study investigated the efficiency of strengthening low-strength RC short columns with fiber-reinforced cementitious matrix (FRCM). Twelve columns were cast with concrete with a compressive strength of 18 MPa. All columns had a reinforcement ratio of 1.5%. The investigated parameters were the column cross section (square or circular), the spacing between the ties (90 and 180 mm) selected based on the columns' dimensions, and the number of FRCM layers used in wrapping the columns [zero, two, and four layers of paraphenylene-ben-zobisoxazole (PBO) FRCM]. All columns had a clear height of 800 mm and were tested monotonically until failure. Results showed that for columns wrapped with two PBO-FRCM layers, using a tie spacing of 90 mm eliminated the effect of varying the cross section. However, circular columns showed a higher increase in capacity than square columns for a tie spacing of 180 mm, where the increase was 40%. For all columns wrapped with four PBO-FRCM layers, the cross-section shape was the sole influence on ultimate capacity, where circular columns noticeably showed a more improved capacity. Also, column load-strain relationships were only influenced by the tie spacing. All strengthened columns showed improved ductility with the increase in PBO-FRCM layers. Using existing design provisions, the theoretical capacity of the columns was calculated, and results showed that the code underestimates ultimate capacity, where the theoretical capacities were lower than the experimental ones by 5%-20%.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Strain Rate and Stress Amplitude Effects on the Mechanical Behavior of Carbon Paste Used in the Hall–Héroult Process and Subjected to Cyclic Loadings.\n \n \n \n \n\n\n \n Kansoun, Z.; Chaouki, H.; Picard, D.; Lauzon-Gauthier, J.; Alamdari, H.; and Fafard, M.\n\n\n \n\n\n\n Materials, 15(3). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"StrainPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220711632858 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Strain Rate and Stress Amplitude Effects on the Mechanical Behavior of Carbon Paste Used in the Hall–Héroult Process and Subjected to Cyclic Loadings},\njournal = {Materials},\nauthor = {Kansoun, Zahraa and Chaouki, Hicham and Picard, Donald and Lauzon-Gauthier, Julien and Alamdari, Houshang and Fafard, Mario},\nvolume = {15},\nnumber = {3},\nyear = {2022},\nissn = {19961944},\nabstract = {<div data-language="eng" data-ev-field="abstract">Carbon products such as anodes and ramming paste must have well-defined physical, mechanical, chemical, and electrical properties to perform their functions effectively in the aluminum electrolysis cell. The physical and mechanical properties of these products are assigned during the shaping procedure in which compaction stresses are applied to the green carbon paste. The optimization of the shaping process is crucial to improving the properties of the carbon products and consequently to increasing the energy efficiency and decreasing the greenhouse gas emissions of the Hall–Héroult process. The objective of this study is to experimentally investigate the effect(s) of the strain rate, of the stress maximum amplitude, and of the unloading level on the behavior of a green carbon paste subjected to cyclic loading. To this end, experiments consisting of (1) cyclic compaction tests at different maximum stress amplitudes and strain rates, and (2) cyclic compaction tests with different unloading levels were carried out. The study obtained the following findings about the behavior of carbon paste subjected to cyclic loads. The strain rate in the studied range had no effect either on the evolution of the permanent strain as a function of the cycle number, nor on the shape of the stress–strain hysteresis during the cyclic loading. Moreover, samples of the same density that had been subjected to different maximum stress amplitudes in their loading history did not have the same shape of the stress–strain curve. On the other hand, despite having different densities, samples subjected to the same number of cycles produce the same stress–strain curve during loading even though they were subjected to different maximum stress amplitudes in their loading histories. Finally, the level of unloading during each cycle of a cyclic test proved significant; when the sample was unloaded to a lower level of stress during each cycle, the permanent strain as a function of the cycle number was higher.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Strain rate},\n%keywords = {Compaction;Electrolysis;Stress analysis;Gas emissions;Cyclic loads;Greenhouse gases;Carbon;Energy efficiency;Unloading;},\n%note = {Carbon pastes;Carbon products;Compaction test;Cyclic compaction;Green carbons;Maximum stress;Permanent strain;Strain-rates;Stress amplitudes;Unloading level;},\nURL = {http://dx.doi.org/10.3390/ma15031263},\n} \n\n\n
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Carbon products such as anodes and ramming paste must have well-defined physical, mechanical, chemical, and electrical properties to perform their functions effectively in the aluminum electrolysis cell. The physical and mechanical properties of these products are assigned during the shaping procedure in which compaction stresses are applied to the green carbon paste. The optimization of the shaping process is crucial to improving the properties of the carbon products and consequently to increasing the energy efficiency and decreasing the greenhouse gas emissions of the Hall–Héroult process. The objective of this study is to experimentally investigate the effect(s) of the strain rate, of the stress maximum amplitude, and of the unloading level on the behavior of a green carbon paste subjected to cyclic loading. To this end, experiments consisting of (1) cyclic compaction tests at different maximum stress amplitudes and strain rates, and (2) cyclic compaction tests with different unloading levels were carried out. The study obtained the following findings about the behavior of carbon paste subjected to cyclic loads. The strain rate in the studied range had no effect either on the evolution of the permanent strain as a function of the cycle number, nor on the shape of the stress–strain hysteresis during the cyclic loading. Moreover, samples of the same density that had been subjected to different maximum stress amplitudes in their loading history did not have the same shape of the stress–strain curve. On the other hand, despite having different densities, samples subjected to the same number of cycles produce the same stress–strain curve during loading even though they were subjected to different maximum stress amplitudes in their loading histories. Finally, the level of unloading during each cycle of a cyclic test proved significant; when the sample was unloaded to a lower level of stress during each cycle, the permanent strain as a function of the cycle number was higher.
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Sensitivity of the seismic response of reinforced concrete masonry walls with boundary elements to design parameters.\n \n \n \n \n\n\n \n AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 255. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"SensitivityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220511576888 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Sensitivity of the seismic response of reinforced concrete masonry walls with boundary elements to design parameters},\njournal = {Engineering Structures},\nauthor = {AbdelRahman, Belal and Galal, Khaled},\nvolume = {255},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">The seismic design of concrete masonry structures with reinforced masonry shear walls with boundary elements (RMSW+BEs) depends on the wall design parameters. This paper aims to investigate the sensitivity of the nonlinear seismic response of RMSW+BEs to critical design parameters such as the wall geometry and the material properties to optimize the seismic design of RMSW+BEs. In this study, the influence of eight design parameters on the seismic performance of RMSW+BEs was investigated. The studied parameters were wall aspect ratio, axial compressive stress, masonry boundary element (MBE) size, wall length, masonry compressive strength, masonry compressive strain at peak stress, masonry modulus of elasticity, and vertical reinforcement ratio of the boundary elements. These combinations yielded valuable data accumulated from the nonlinear behavior of one hundred thirty-five (135) RMSW+BEs. The results showed that as the wall aspect ratio and axial compressive stress increased, the displacement ductility decreased significantly. In addition, increasing the boundary element size and wall length increased the wall lateral ultimate capacity and displacement ductility. The lateral yield capacity, ultimate capacity, and effective stiffness of the walls were found to be highly sensitive to changes in the vertical reinforcement ratio of the boundary elements. The displacement ductility was highly sensitive to uncertainties in the masonry compressive strain at peak stress. This study elucidates some of the most critical design parameters influencing the seismic response of RMSW+BEs.<br/></div> © 2022 Elsevier Ltd},\nkey = {Aspect ratio},\n%keywords = {Walls (structural partitions);Seismic design;Compressive stress;Compressive strength;Ductility;Reinforced concrete;Seismic response;Stiffness;},\n%note = {Boundary elements;Concrete masonry;Design parameters;Displacement ductility;Ductility, effective stiffness;Effective stiffness;Masonry shear walls;Reinforced masonry;Sensitivity;Structural walls;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2022.113953},\n} \n\n\n
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The seismic design of concrete masonry structures with reinforced masonry shear walls with boundary elements (RMSW+BEs) depends on the wall design parameters. This paper aims to investigate the sensitivity of the nonlinear seismic response of RMSW+BEs to critical design parameters such as the wall geometry and the material properties to optimize the seismic design of RMSW+BEs. In this study, the influence of eight design parameters on the seismic performance of RMSW+BEs was investigated. The studied parameters were wall aspect ratio, axial compressive stress, masonry boundary element (MBE) size, wall length, masonry compressive strength, masonry compressive strain at peak stress, masonry modulus of elasticity, and vertical reinforcement ratio of the boundary elements. These combinations yielded valuable data accumulated from the nonlinear behavior of one hundred thirty-five (135) RMSW+BEs. The results showed that as the wall aspect ratio and axial compressive stress increased, the displacement ductility decreased significantly. In addition, increasing the boundary element size and wall length increased the wall lateral ultimate capacity and displacement ductility. The lateral yield capacity, ultimate capacity, and effective stiffness of the walls were found to be highly sensitive to changes in the vertical reinforcement ratio of the boundary elements. The displacement ductility was highly sensitive to uncertainties in the masonry compressive strain at peak stress. This study elucidates some of the most critical design parameters influencing the seismic response of RMSW+BEs.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Forest Products and Circular Economy Strategies: A Canadian Perspective.\n \n \n \n \n\n\n \n Gagnon, B.; Tanguay, X.; Amor, B.; and Imbrogno, A. F.\n\n\n \n\n\n\n Energies, 15(3). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ForestPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220411500669 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Forest Products and Circular Economy Strategies: A Canadian Perspective},\njournal = {Energies},\nauthor = {Gagnon, Bruno and Tanguay, Xavier and Amor, Ben and Imbrogno, Anthony F.},\nvolume = {15},\nnumber = {3},\nyear = {2022},\nissn = {19961073},\nabstract = {<div data-language="eng" data-ev-field="abstract">The Government of Canada has embraced circular economy and is supporting an increasing number of initiatives in the field. However, implementation examples remain scattered and certain stakeholders are eager to see a greater level of commitment from policy makers. The purpose of this study is to provide a Canadian perspective on how, and to what extent, forest products are compatible with circular economy strategies. This topic was investigated through interviews with 16 Canadian experts in eco-design, circular economy, forest products and/or waste management, with a focus on construction and packaging. Efforts made by forest industries at the manufacturing stage to reduce resource consumption were acknowledged, but the implementation of other circular economy strategies, such as reuse, recycling and energy recovery, is uneven. While there is low-hanging fruit for incremental improvements, such as the processing of recovered lumber in wood panels and not mixing cardboard fibres with other paper streams to avoid downcycling, several barriers to the widespread adoption of the most promising strategies were identified. The experts consulted proposed several solutions to accelerate the deployment of circular economy strategies for forest products, for which government interventions would need to be tailored to the different policy readiness levels (PRLs) observed in the construction and packaging sectors. With circularity having economy-wide implications, setting a clear policy direction at the national level, with a circular economy roadmap for Canada for example, could accelerate coordinated implementation within and across sectors, including forest industries.<br/></div> © 2022 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Product design},\n%keywords = {Packaging;Packaging materials;Waste management;Cardboard;Forestry;Building materials;},\n%note = {Circular economy;Energy recovery;Forest industry;Forest products;Forest sectors;Incremental improvements;Manufacturing stages;Policy makers;Resources consumption;Reuse;},\nURL = {http://dx.doi.org/10.3390/en15030673},\n} \n\n\n
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The Government of Canada has embraced circular economy and is supporting an increasing number of initiatives in the field. However, implementation examples remain scattered and certain stakeholders are eager to see a greater level of commitment from policy makers. The purpose of this study is to provide a Canadian perspective on how, and to what extent, forest products are compatible with circular economy strategies. This topic was investigated through interviews with 16 Canadian experts in eco-design, circular economy, forest products and/or waste management, with a focus on construction and packaging. Efforts made by forest industries at the manufacturing stage to reduce resource consumption were acknowledged, but the implementation of other circular economy strategies, such as reuse, recycling and energy recovery, is uneven. While there is low-hanging fruit for incremental improvements, such as the processing of recovered lumber in wood panels and not mixing cardboard fibres with other paper streams to avoid downcycling, several barriers to the widespread adoption of the most promising strategies were identified. The experts consulted proposed several solutions to accelerate the deployment of circular economy strategies for forest products, for which government interventions would need to be tailored to the different policy readiness levels (PRLs) observed in the construction and packaging sectors. With circularity having economy-wide implications, setting a clear policy direction at the national level, with a circular economy roadmap for Canada for example, could accelerate coordinated implementation within and across sectors, including forest industries.
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Equivalent frame discretisation for URM façades with irregular opening layouts.\n \n \n \n \n\n\n \n Morandini, C.; Malomo, D.; and Penna, A.\n\n\n \n\n\n\n Bulletin of Earthquake Engineering, 20(5): 2589 - 2618. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"EquivalentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220511545473 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Equivalent frame discretisation for URM façades with irregular opening layouts},\njournal = {Bulletin of Earthquake Engineering},\nauthor = {Morandini, Chiara and Malomo, Daniele and Penna, Andrea},\nvolume = {20},\nnumber = {5},\nyear = {2022},\npages = {2589 - 2618},\nissn = {1570761X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Researchers and practitioners widely employ simplified Equivalent Frame Models (EFM) for reproducing the in-plane governed response of unreinforced brick masonry (URM) structures, as they typically represent an acceptable compromise between numerical accuracy and computational cost. However, when considering URM structural systems with irregular opening distribution, the definition of the effective height and length of deformable components (i.e. pier and spandrel elements) still represents an open challenge. In this work, the influence of irregular distribution of openings on the predicted lateral response of full-scale URM façades was investigated. To this end, several geometrical combinations characterised by various degrees of irregularity were considered and idealised according to commonly employed EF discretisation approaches. Then, after a preliminary calibration process against experimental tests on both individual piers and a full-scale building façade, EFM results were compared with micro-modelling predictions, carried out within the framework of the Applied Element Method and used as a benchmark. Although in specific irregular configurations using some discretisation approaches, macro and micro-models converge to similar results, non-negligible differences in terms of initial lateral stiffness, base-shear and damage distribution were observed with other EF schemes or opening layouts, thus indicating that a careful selection of appropriate criteria is indeed needed when performing in-plane analyses of URM systems with irregular opening distributions. Finally, building on inferred simulated data, potential solutions are given to overcome typical EF discretisation issues and better approximate micro-modelling outcomes.<br/></div> © 2022, The Author(s).},\nkey = {Piers},\n%keywords = {Masonry materials;},\n%note = {Applied element method;Element method;Equivalent frame;Equivalent frame model;Frame models;In-plane;Irregular opening layout;Micromodels;Opening layouts;Unreinforced masonries (URMs);},\nURL = {http://dx.doi.org/10.1007/s10518-022-01315-0},\n} \n\n\n
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Researchers and practitioners widely employ simplified Equivalent Frame Models (EFM) for reproducing the in-plane governed response of unreinforced brick masonry (URM) structures, as they typically represent an acceptable compromise between numerical accuracy and computational cost. However, when considering URM structural systems with irregular opening distribution, the definition of the effective height and length of deformable components (i.e. pier and spandrel elements) still represents an open challenge. In this work, the influence of irregular distribution of openings on the predicted lateral response of full-scale URM façades was investigated. To this end, several geometrical combinations characterised by various degrees of irregularity were considered and idealised according to commonly employed EF discretisation approaches. Then, after a preliminary calibration process against experimental tests on both individual piers and a full-scale building façade, EFM results were compared with micro-modelling predictions, carried out within the framework of the Applied Element Method and used as a benchmark. Although in specific irregular configurations using some discretisation approaches, macro and micro-models converge to similar results, non-negligible differences in terms of initial lateral stiffness, base-shear and damage distribution were observed with other EF schemes or opening layouts, thus indicating that a careful selection of appropriate criteria is indeed needed when performing in-plane analyses of URM systems with irregular opening distributions. Finally, building on inferred simulated data, potential solutions are given to overcome typical EF discretisation issues and better approximate micro-modelling outcomes.
© 2022, The Author(s).\n
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\n \n\n \n \n \n \n \n \n Finite element analysis of flexural response of steel joist top chord extensions.\n \n \n \n \n\n\n \n Assily Alegre, M.; and Tremblay, R.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 190. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"FinitePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220311466642 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Finite element analysis of flexural response of steel joist top chord extensions},\njournal = {Journal of Constructional Steel Research},\nauthor = {Assily Alegre, Michel-Ange and Tremblay, Robert},\nvolume = {190},\nyear = {2022},\nissn = {0143974X},\nabstract = {<div data-language="eng" data-ev-field="abstract">This article investigates the flexural response of cantilevered top chord extensions of open web steel joists used in building structures. Currently, no design guidance is available to assess the bending capacity of these members with consideration of local and lateral-torsional buckling failure modes. The objective of the study was to develop a numerical finite element model capable of predicting the behaviour of 13 joist top chord extensions tested in a previous experimental program. The specimens studied have different cross-sections and restraint conditions. Residual stresses and geometric imperfections were included in the models. To achieve good correlation with the test results in terms of ultimate strength, failure mechanism and moment-deflection response, the model had to include the spacers between the top chord individual members, the load distribution system and the supporting beam used in the tests, as well as translational springs simulating lateral and torsional restraining effects of the steel deck panels. The developed finite element model was capable of reliably predict the measured flexural capacities and failure modes of the specimens. It also permitted to confirm that the steel deck panels and the spacers can positively impact the flexural capacity of the top chord extensions.<br/></div> © 2022 Elsevier Ltd},\nkey = {Finite element method},\n%keywords = {Bridge decks;Software testing;Failure (mechanical);},\n%note = {Deck panel;Finite element analyse;Finite element modelling (FEM);Flexural capacity;Flexural response;Materials characterization;Open web steel joist;Steel decks;Steel joist;Top chord extension;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2021.107122},\n} \n\n\n
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This article investigates the flexural response of cantilevered top chord extensions of open web steel joists used in building structures. Currently, no design guidance is available to assess the bending capacity of these members with consideration of local and lateral-torsional buckling failure modes. The objective of the study was to develop a numerical finite element model capable of predicting the behaviour of 13 joist top chord extensions tested in a previous experimental program. The specimens studied have different cross-sections and restraint conditions. Residual stresses and geometric imperfections were included in the models. To achieve good correlation with the test results in terms of ultimate strength, failure mechanism and moment-deflection response, the model had to include the spacers between the top chord individual members, the load distribution system and the supporting beam used in the tests, as well as translational springs simulating lateral and torsional restraining effects of the steel deck panels. The developed finite element model was capable of reliably predict the measured flexural capacities and failure modes of the specimens. It also permitted to confirm that the steel deck panels and the spacers can positively impact the flexural capacity of the top chord extensions.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n \"A novel approach for the modelling of convective phenomena for building integrated photovoltaic thermal (BIPV/T) systems\".\n \n \n \n \n\n\n \n Dimitrios Rounis, E.; Ioannidis, Z.; Sigounis, A.; Athienitis, A.; and Stathopoulos, T.\n\n\n \n\n\n\n Solar Energy, 232: 328 - 343. 2022.\n \n\n\n\n
\n\n\n\n \n \n \""APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220211456093 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {"A novel approach for the modelling of convective phenomena for building integrated photovoltaic thermal (BIPV/T) systems"},\njournal = {Solar Energy},\nauthor = {Dimitrios Rounis, Efstratios and Ioannidis, Zisis and Sigounis, Anna-Maria and Athienitis, Andreas and Stathopoulos, Theodore},\nvolume = {232},\nyear = {2022},\npages = {328 - 343},\nissn = {0038092X},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study introduces a novel approach for the modelling of convective phenomena for air-based building integrated photovoltaic thermal (BIPV/T) systems, which takes into consideration the interlinked nature of wind-driven and channel flow-driven convective phenomena. Expressions for wind-driven and channel convection used in the respective literature, tend to be case specific, while predictions for air temperature rise have been found to differ by >10 °C from monitored values, resulting in poor thermal utilization and cooling of the PV panels. In this paper, the key parameters affecting the thermal performance of a BIPV/T system, have been formulated into dimensionless groups and correlated to the ratio of wind-driven convective heat transfer to the system heat recovery. This correlation was verified experimentally through testing in a full-scale solar simulator. Air temperature rise predictions from the proposed modelling approach showed good agreement with the experimental results, with an R<sup>2</sup> of 0.93. The proposed methodology can be tailored to individual systems and climates via calibration through key temperatures monitoring and can be instrumental in the optimal control and heat utilization for a coupled BIPV/T-HVAC system. In addition, it can yield increased durability and performance of the PV installation through incorporation of more efficient cooling strategies, through accurate outlet air temperature and PV temperature predictions, respectively.<br/></div> © 2021},\nkey = {Waste heat},\n%keywords = {Atmospheric temperature;Heat convection;Wind effects;Photovoltaic effects;Waste heat utilization;Forecasting;},\n%note = {Air temperature;Building integrated photovoltaic;Building integrated photovoltaic thermal;Dimensionless number;Modeling;Photovoltaic thermals;Photovoltaic/thermal systems;Temperature rise;Thermal cooling;Thermal utilization;},\nURL = {http://dx.doi.org/10.1016/j.solener.2021.12.058},\n} \n\n\n
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This study introduces a novel approach for the modelling of convective phenomena for air-based building integrated photovoltaic thermal (BIPV/T) systems, which takes into consideration the interlinked nature of wind-driven and channel flow-driven convective phenomena. Expressions for wind-driven and channel convection used in the respective literature, tend to be case specific, while predictions for air temperature rise have been found to differ by >10 °C from monitored values, resulting in poor thermal utilization and cooling of the PV panels. In this paper, the key parameters affecting the thermal performance of a BIPV/T system, have been formulated into dimensionless groups and correlated to the ratio of wind-driven convective heat transfer to the system heat recovery. This correlation was verified experimentally through testing in a full-scale solar simulator. Air temperature rise predictions from the proposed modelling approach showed good agreement with the experimental results, with an R2 of 0.93. The proposed methodology can be tailored to individual systems and climates via calibration through key temperatures monitoring and can be instrumental in the optimal control and heat utilization for a coupled BIPV/T-HVAC system. In addition, it can yield increased durability and performance of the PV installation through incorporation of more efficient cooling strategies, through accurate outlet air temperature and PV temperature predictions, respectively.
© 2021\n
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\n \n\n \n \n \n \n \n \n Simplified analytical models for partially grouted reinforced masonry shear walls.\n \n \n \n \n\n\n \n Al-Ahdal, A.; Aly, N.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 252. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"SimplifiedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220211447564 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Simplified analytical models for partially grouted reinforced masonry shear walls},\njournal = {Engineering Structures},\nauthor = {Al-Ahdal, Abdulelah and Aly, Nader and Galal, Khaled},\nvolume = {252},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Partially grouted (PG) masonry shear walls have commonly been used for construction in seismic regions. However, predicting their behaviour is quite complicated due to the non-uniformity presented by the materials’ variety. In this paper, an extensive analytical study was carried out to establish simplified backbone models referred here as "analytical models" as a first attempt in the literature to simulate PG masonry walls’ behaviour. A nonlinear finite element model was developed and validated against several experimental specimens from the literature. The numerical model was then utilized to compensate for the lack of experimental data by generating a comprehensive matrix of 196 numerical models covering a wide range of design and detailing parameters. These parameters include the aspect ratio, the spacing between vertical and horizontal grouted cells, the axial load, the ratio of vertical and horizontal reinforcement, and the compressive strength of grouted and ungrouted masonry units. Subsequently, three penta-linear load–displacement backbone models were proposed using linear regression analysis. Five secant stiffness expressions, namely: cracking, yielding, ultimate, 20% strength reduction, and 40% strength reduction, were derived to define the backbone curve of each wall category. Consequently, the proposed analytical models were examined against samples from the numerical matrix and the experimental specimens, which were not considered in the calibration of the analytical models. The results showed that the proposed analytical models provide good predictions of the response of PG masonry walls. Finally, the stiffness reduction factor provided by CSA S304-14 for masonry, α, was updated by developing three new coefficients for the PG walls’ categories based on regression analyses between the numerical stiffnesses at yielding and their corresponding values calculated using α.<br/></div> © 2021 Elsevier Ltd},\nkey = {Analytical models},\n%keywords = {Regression analysis;Matrix algebra;Mortar;Aspect ratio;Compressive strength;Factor analysis;Grouting;Nonlinear analysis;Shear walls;Numerical models;Stiffness;Concrete construction;Reinforced concrete;},\n%note = {Backbone model;Experimental specimens;Masonry shear walls;Masonry walls;Nonuniformity;Partially grouted masonry wall;Reinforced masonry;Seismic regions;Stiffness reduction factors;Strength reduction;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.113643},\n} \n\n\n
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Partially grouted (PG) masonry shear walls have commonly been used for construction in seismic regions. However, predicting their behaviour is quite complicated due to the non-uniformity presented by the materials’ variety. In this paper, an extensive analytical study was carried out to establish simplified backbone models referred here as \"analytical models\" as a first attempt in the literature to simulate PG masonry walls’ behaviour. A nonlinear finite element model was developed and validated against several experimental specimens from the literature. The numerical model was then utilized to compensate for the lack of experimental data by generating a comprehensive matrix of 196 numerical models covering a wide range of design and detailing parameters. These parameters include the aspect ratio, the spacing between vertical and horizontal grouted cells, the axial load, the ratio of vertical and horizontal reinforcement, and the compressive strength of grouted and ungrouted masonry units. Subsequently, three penta-linear load–displacement backbone models were proposed using linear regression analysis. Five secant stiffness expressions, namely: cracking, yielding, ultimate, 20% strength reduction, and 40% strength reduction, were derived to define the backbone curve of each wall category. Consequently, the proposed analytical models were examined against samples from the numerical matrix and the experimental specimens, which were not considered in the calibration of the analytical models. The results showed that the proposed analytical models provide good predictions of the response of PG masonry walls. Finally, the stiffness reduction factor provided by CSA S304-14 for masonry, α, was updated by developing three new coefficients for the PG walls’ categories based on regression analyses between the numerical stiffnesses at yielding and their corresponding values calculated using α.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Recent Advances in Nature-Inspired Solutions for Ground Engineering (NiSE).\n \n \n \n \n\n\n \n Assadi-Langroudi, A.; OKelly, B. C.; Barreto, D.; Cotecchia, F.; Dicks, H.; Ekinci, A.; Garcia, F. E.; Harbottle, M.; Tagarelli, V.; Jefferson, I.; Maghoul, P.; Masoero, E.; El Mountassir, G.; Muhunthan, B.; Geng, X.; Ghadr, S.; Mirzababaei, M.; Mitrani, H.; and van Paassen, L.\n\n\n \n\n\n\n International Journal of Geosynthetics and Ground Engineering, 8(1). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"RecentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220211453414 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Recent Advances in Nature-Inspired Solutions for Ground Engineering (NiSE)},\njournal = {International Journal of Geosynthetics and Ground Engineering},\nauthor = {Assadi-Langroudi, Arya and OKelly, Brendan C. and Barreto, Daniel and Cotecchia, Federica and Dicks, Henry and Ekinci, Abdullah and Garcia, Fernando E. and Harbottle, Michael and Tagarelli, Vito and Jefferson, Ian and Maghoul, Pooneh and Masoero, Enrico and El Mountassir, Grainne and Muhunthan, Balasingam and Geng, Xueyu and Ghadr, Soheil and Mirzababaei, Mehdi and Mitrani, Helen and van Paassen, Leon},\nvolume = {8},\nnumber = {1},\nyear = {2022},\nissn = {21999260},\nabstract = {<div data-language="eng" data-ev-field="abstract">The ground is a natural grand system; it is composed of myriad constituents that aggregate to form several geologic and biogenic systems. These systems operate independently and interplay harmoniously via important networked structures over multiple spatial and temporal scales. This paper presents arguments and derivations couched by the authors, to first give a better understanding of these intertwined networked structures, and then to give an insight of why and how these can be imitated to develop a new generation of nature-symbiotic ground engineering techniques. The paper draws on numerous recent advances made by the authors, and others, in imitating forms (e.g. synthetic fibres that imitate plant roots), materials (e.g. living composite materials, or living soil that imitate fungi and microbes), generative processes (e.g. managed decomposition of construction rubble to mimic weathering of aragonites to calcites), and functions (e.g. recreating the self-healing, self-producing, and self-forming capacity of natural systems). Advances are reported in three categories of Materials, Models, and Methods (3Ms). A novel value-based appraisal tool is also presented, providing a means to vet the effectiveness of 3Ms as standalone units or in combinations.<br/></div> © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.},\nkey = {Calcite},\n%keywords = {Aggregates;Biomimetics;Self-healing materials;Weathering;},\n%note = {Biogenics;Biomimicry;Engineering techniques;Ground engineerings;Improvement;Natural;Networked structures;Self-heal;Spatial and temporal scale;Symbiotics;},\nURL = {http://dx.doi.org/10.1007/s40891-021-00349-9},\n} \n\n\n
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The ground is a natural grand system; it is composed of myriad constituents that aggregate to form several geologic and biogenic systems. These systems operate independently and interplay harmoniously via important networked structures over multiple spatial and temporal scales. This paper presents arguments and derivations couched by the authors, to first give a better understanding of these intertwined networked structures, and then to give an insight of why and how these can be imitated to develop a new generation of nature-symbiotic ground engineering techniques. The paper draws on numerous recent advances made by the authors, and others, in imitating forms (e.g. synthetic fibres that imitate plant roots), materials (e.g. living composite materials, or living soil that imitate fungi and microbes), generative processes (e.g. managed decomposition of construction rubble to mimic weathering of aragonites to calcites), and functions (e.g. recreating the self-healing, self-producing, and self-forming capacity of natural systems). Advances are reported in three categories of Materials, Models, and Methods (3Ms). A novel value-based appraisal tool is also presented, providing a means to vet the effectiveness of 3Ms as standalone units or in combinations.
© 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Strengthening the hogging and sagging regions in continuous beams with fiber-reinforced cementitious matrix (FRCM): Experimental and analytical investigations.\n \n \n \n \n\n\n \n Mandor, A.; and El Refai, A.\n\n\n \n\n\n\n Construction and Building Materials, 321. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"StrengtheningPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220211455818 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Strengthening the hogging and sagging regions in continuous beams with fiber-reinforced cementitious matrix (FRCM): Experimental and analytical investigations},\njournal = {Construction and Building Materials},\nauthor = {Mandor, Ahmed and El Refai, Ahmed},\nvolume = {321},\nyear = {2022},\nissn = {09500618},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper reports on the flexural performance of ten reinforced concrete (RC) continuous beams strengthened with fabric-reinforced cementitious matrix (FRCM) systems. The test parameters included the type of the strengthening system used, the location of the deficient section that required strengthening, and the number of the fabric layers used. Apart from two unstrengthened control beams, two beams were strengthened with two layers of Polyparaphenylene benzobisoxazole (PBO) FRCM. The other six beams were strengthened with four layers of PBO-FRCM, two carbon FRCM (C-FRCM), and one layer of carbon fiber-reinforced polymer sheet (CFRP), all having the same axial stiffness. The test results confirmed the excellent rotational capacity of the FRCM-strengthened beams and their ability to efficiently redistribute moments between their critical sections. The moment redistribution ratio ranged between 20 and 31% for beams strengthened with FRCM in their hogging regions (51 and 77% of that of the control beams) compared to 8 and 13% for those strengthened in their sagging regions (42 and 65% of that of the control beams). The FRP-strengthened hogging and sagging sections showed moment redistribution ratios that ranged between 15 and 2%, respectively (37 and 9% of that of the control beams). The FRCM-strengthened beams also showed a remarkable ductile response with an average ductility index of 90% of that of their control beams compared to 42% only for the FRP-strengthened ones. Analytically, the capacity of the FRCM-strengthened beams predicted using a strain model that was previously developed by the authors agreed well with the experimental capacity obtained during the tests with an experimental-to-predicted ratio of 0.99 ± 0.02.<br/></div> © 2022 Elsevier Ltd},\nkey = {Ductility},\n%keywords = {Reinforced concrete;Carbon fiber reinforced plastics;Concrete beams and girders;},\n%note = {Cementitious matrices;Continuous beams;Fabric reinforced cementitious matrix;Fiber-reinforced cementitious matrix;Fiber-reinforced polymers;Fibre reinforced polymers;Fibre-reinforced;Flexure;Moment redistribution;Strain modeling;Strengthening;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2022.126341},\n} \n\n\n
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This paper reports on the flexural performance of ten reinforced concrete (RC) continuous beams strengthened with fabric-reinforced cementitious matrix (FRCM) systems. The test parameters included the type of the strengthening system used, the location of the deficient section that required strengthening, and the number of the fabric layers used. Apart from two unstrengthened control beams, two beams were strengthened with two layers of Polyparaphenylene benzobisoxazole (PBO) FRCM. The other six beams were strengthened with four layers of PBO-FRCM, two carbon FRCM (C-FRCM), and one layer of carbon fiber-reinforced polymer sheet (CFRP), all having the same axial stiffness. The test results confirmed the excellent rotational capacity of the FRCM-strengthened beams and their ability to efficiently redistribute moments between their critical sections. The moment redistribution ratio ranged between 20 and 31% for beams strengthened with FRCM in their hogging regions (51 and 77% of that of the control beams) compared to 8 and 13% for those strengthened in their sagging regions (42 and 65% of that of the control beams). The FRP-strengthened hogging and sagging sections showed moment redistribution ratios that ranged between 15 and 2%, respectively (37 and 9% of that of the control beams). The FRCM-strengthened beams also showed a remarkable ductile response with an average ductility index of 90% of that of their control beams compared to 42% only for the FRP-strengthened ones. Analytically, the capacity of the FRCM-strengthened beams predicted using a strain model that was previously developed by the authors agreed well with the experimental capacity obtained during the tests with an experimental-to-predicted ratio of 0.99 ± 0.02.
© 2022 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Local/global coupled instabilities of slender I-sections under compression.\n \n \n \n \n\n\n \n Li, L.; and Boissonnade, N.\n\n\n \n\n\n\n Thin-Walled Structures, 172. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"Local/globalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220111430889 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Local/global coupled instabilities of slender I-sections under compression},\njournal = {Thin-Walled Structures},\nauthor = {Li, Liya and Boissonnade, Nicolas},\nvolume = {172},\nyear = {2022},\nissn = {02638231},\nabstract = {<div data-language="eng" data-ev-field="abstract">Current standards usually deal with local/global interactive buckling behaviour rather roughly through combining the traditional Effective Width Method (E.W.M.) with member buckling curves; this leads to long and tedious design calculation processes, sometimes also providing inaccurate resistance predictions. A more economic and simple design method following the actual local/global interactive behaviour is proposed here, based on the Overall Interaction Concept (O.I.C.), through decomposing interactive buckling through local/global interaction factors. The accuracy of this O.I.C.-based design proposal is evaluated against numerical results from validated shell F.E. models, which evidences that the O.I.C. predicts more accurate member resistance than the current Eurocode 3 and American Standards recommendations, for both hot-rolled and welded slender I-section members under axial compression. The reliability of the proposed O.I.C. approach is also found excellent, following statistical analysis guidelines from EN 1990.<br/></div> © 2021 Elsevier Ltd},\nkey = {Buckling},\n%keywords = {Hot rolled steel;Reliability analysis;Welding;Hot rolling;},\n%note = {'current;Buckling behaviour;Effective width methods;Hot-rolled;Hot-rolled and welded slende I-section member;I-sections;Interaction concepts;Interactive buckling;Local/global interactive buckling behavior;Overall interaction concept;},\nURL = {http://dx.doi.org/10.1016/j.tws.2021.108842},\n} \n\n\n
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Current standards usually deal with local/global interactive buckling behaviour rather roughly through combining the traditional Effective Width Method (E.W.M.) with member buckling curves; this leads to long and tedious design calculation processes, sometimes also providing inaccurate resistance predictions. A more economic and simple design method following the actual local/global interactive behaviour is proposed here, based on the Overall Interaction Concept (O.I.C.), through decomposing interactive buckling through local/global interaction factors. The accuracy of this O.I.C.-based design proposal is evaluated against numerical results from validated shell F.E. models, which evidences that the O.I.C. predicts more accurate member resistance than the current Eurocode 3 and American Standards recommendations, for both hot-rolled and welded slender I-section members under axial compression. The reliability of the proposed O.I.C. approach is also found excellent, following statistical analysis guidelines from EN 1990.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n The Overall Interaction Concept for the design of hot-rolled and welded I-sections under combined loading.\n \n \n \n \n\n\n \n Li, L.; Gerard, L.; Kettler, M.; and Boissonnade, N.\n\n\n \n\n\n\n Thin-Walled Structures, 172. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220111428538 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {The Overall Interaction Concept for the design of hot-rolled and welded I-sections under combined loading},\njournal = {Thin-Walled Structures},\nauthor = {Li, Liya and Gerard, Lucile and Kettler, Markus and Boissonnade, Nicolas},\nvolume = {172},\nyear = {2022},\nissn = {02638231},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper investigates the resistance capacity of hot-rolled and welded I-sections subjected to combined loading as influenced by plasticity and local buckling effects. Extensive numerical parametric studies through validated finite element models are carried out to consider different steel grades, section shapes and various load cases including bi-axial bending without axial compression (M<inf>y</inf>+M<inf>z</inf>), mono-axial bending with axial compression (N+M<inf>y</inf> or N+M<inf>z</inf>) and bi-axial bending with axial compression (N+M<inf>y</inf>+M<inf>z</inf>). Based on the Overall Interaction Concept (O.I.C.), a three-dimensional resistance space is built to capture the cross-section behaviour under different load cases and interaction design equations are proposed, based on the numerical results. Overall, it is evidenced that the proposed O.I.C approach provides more continuous and significantly more accurate resistance predictions than existing design standards.<br/></div> © 2021 Elsevier Ltd},\nkey = {Axial compression},\n%keywords = {Hot rolling;Welding;},\n%note = {Axial bending;Buckling effects;Combined loading;Finite element modelling (FEM);Hot-rolled;I-sections;Interaction concepts;Local buckling;Numerical parametric studies;Resistance capacity;},\nURL = {http://dx.doi.org/10.1016/j.tws.2021.108623},\n} \n\n\n
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This paper investigates the resistance capacity of hot-rolled and welded I-sections subjected to combined loading as influenced by plasticity and local buckling effects. Extensive numerical parametric studies through validated finite element models are carried out to consider different steel grades, section shapes and various load cases including bi-axial bending without axial compression (My+Mz), mono-axial bending with axial compression (N+My or N+Mz) and bi-axial bending with axial compression (N+My+Mz). Based on the Overall Interaction Concept (O.I.C.), a three-dimensional resistance space is built to capture the cross-section behaviour under different load cases and interaction design equations are proposed, based on the numerical results. Overall, it is evidenced that the proposed O.I.C approach provides more continuous and significantly more accurate resistance predictions than existing design standards.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Seismic fragility of approach backfill differential settlement for statewide bridges in California.\n \n \n \n \n\n\n \n Shao, Y.; Xie, Y.; Roblee, C. J.; and Zhang, J.\n\n\n \n\n\n\n Soil Dynamics and Earthquake Engineering, 153. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220111416164 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic fragility of approach backfill differential settlement for statewide bridges in California},\njournal = {Soil Dynamics and Earthquake Engineering},\nauthor = {Shao, Yihan and Xie, Yazhou and Roblee, Clifford J. and Zhang, Jian},\nvolume = {153},\nyear = {2022},\nissn = {02677261},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study develops the first-of-its-kind seismic fragility models for estimation of approach backfill differential settlement for statewide bridges in California. Seismic compression analysis is carried out through a multi-step framework that estimates seismic-induced shear strain profiles for backfills, converts them to volumetric strains, and computes soil settlement through depth integration. As a crucial step, three independent methods are advanced on a uniform basis to estimate soil shear strains under earthquake loading: a simplified one-dimensional (1D) Static approach, a 1D Dynamic method from site response analysis, and a two-dimensional (2D) Dynamic method that accounts for the trapezoidal shape of the bridge embankment. Subsequently, seismic fragility models are derived using the multiple-stripe analysis (MSA) approach that convolves the seismic demands of backfill settlement with capacity models for several broad groupings of approach-slab designs having different abutment and abutment-foundation types, and abutment-connection details. A survey of California's bridge inventory provides stochastic data inputs that quantify various sources of uncertainties in backfill profile, embankment geometry, and both approach slab and abutment designs. Finally, a combined fragility model is developed by considering an equal methodological contribution from each mentioned approach. The final fragility models suggest that the lowest differential-settlement fragility is achieved by combining regular abutments on spread footings with long-length approach slabs connected to the bridge abutment, while the worst case occurs where bridge abutments on deep foundations are not connected with abutting pavements. The proposed seismic fragility models offer a sound basis for first-order estimation of approach-fill differential settlement which may lead to reduced ride quality, traffic speed reductions, and in extreme cases, temporary roadway closure. These represent one of many seismic fragility models for the full range of bridge components needed for prioritizing seismic retrofit measures, facilitating post-hazard inspections and repair actions, as well as assessing the network mobility for resilience quantification.<br/></div> © 2021 Elsevier Ltd},\nkey = {Abutments (bridge)},\n%keywords = {Embankments;Seismology;Shear strain;Stochastic systems;Damage detection;},\n%note = {Approach damage;Approach slabs;Backfill settlement;California;California bridge;Fragility assessment;Multiple-stripe analyse;Regional seismic fragility assessment;Seismic fragility;Stripe analysis;},\nURL = {http://dx.doi.org/10.1016/j.soildyn.2021.107049},\n} \n\n\n
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This study develops the first-of-its-kind seismic fragility models for estimation of approach backfill differential settlement for statewide bridges in California. Seismic compression analysis is carried out through a multi-step framework that estimates seismic-induced shear strain profiles for backfills, converts them to volumetric strains, and computes soil settlement through depth integration. As a crucial step, three independent methods are advanced on a uniform basis to estimate soil shear strains under earthquake loading: a simplified one-dimensional (1D) Static approach, a 1D Dynamic method from site response analysis, and a two-dimensional (2D) Dynamic method that accounts for the trapezoidal shape of the bridge embankment. Subsequently, seismic fragility models are derived using the multiple-stripe analysis (MSA) approach that convolves the seismic demands of backfill settlement with capacity models for several broad groupings of approach-slab designs having different abutment and abutment-foundation types, and abutment-connection details. A survey of California's bridge inventory provides stochastic data inputs that quantify various sources of uncertainties in backfill profile, embankment geometry, and both approach slab and abutment designs. Finally, a combined fragility model is developed by considering an equal methodological contribution from each mentioned approach. The final fragility models suggest that the lowest differential-settlement fragility is achieved by combining regular abutments on spread footings with long-length approach slabs connected to the bridge abutment, while the worst case occurs where bridge abutments on deep foundations are not connected with abutting pavements. The proposed seismic fragility models offer a sound basis for first-order estimation of approach-fill differential settlement which may lead to reduced ride quality, traffic speed reductions, and in extreme cases, temporary roadway closure. These represent one of many seismic fragility models for the full range of bridge components needed for prioritizing seismic retrofit measures, facilitating post-hazard inspections and repair actions, as well as assessing the network mobility for resilience quantification.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Integration of standing column wells in urban context: A numerical investigation-case in the City of Montreal.\n \n \n \n \n\n\n \n Laroche, V.; Pasquier, P.; and Courcelles, B.\n\n\n \n\n\n\n Sustainable Cities and Society, 78. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"IntegrationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220111414658 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Integration of standing column wells in urban context: A numerical investigation-case in the City of Montreal},\njournal = {Sustainable Cities and Society},\nauthor = {Laroche, Vincent and Pasquier, Philippe and Courcelles, Benoit},\nvolume = {78},\nyear = {2022},\nissn = {22106707},\nabstract = {<div data-language="eng" data-ev-field="abstract">While the use of new technologies with low greenhouse gas emissions is growing quickly, ground source heat pump systems offer net advantages for urban environments. Standing column well, which exploits groundwater as a heat transfer fluid, requires less space and is less expensive than traditional closed-loop ground heat exchangers. However, a lack of information regarding standing column well is observed, especially in terms of interference with neighboring systems. A semi-regional finite element model was thus developed to emulate the thermal and hydraulic behavior of several standing column wells operated in an area of the City of Montreal. Five municipal and residential buildings were considered, with a total of 14 standing column wells and 5 injection wells. Numerical simulations indicate that infrastructure, such as buildings and roads, have a greater effect on increasing ground temperature than standing column wells. Results show the viability of each system over 10 years of operation without noticeable performance degradation and environmental impacts. Results also indicate that thermal modifications in the ground have a wider and greater extent than hydraulic modifications and decreases rapidly with depth. The study demonstrates that the operation of those systems in an urban context is viable in short and mid-term.<br/></div> © 2021},\nkey = {Greenhouse gases},\n%keywords = {Environmental impact;Gas emissions;Geothermal energy;Geothermal heat pumps;Groundwater;Heat transfer;},\n%note = {Greenhouse gas emissions;Groundsource heat pump (GSHP);Heat island;Numerical investigations;Shallow geothermal energies;Standing column wells;Thermal;Thermal and hydraulic interference;Underground heat island;Urban context;},\nURL = {http://dx.doi.org/10.1016/j.scs.2021.103513},\n} \n\n\n
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While the use of new technologies with low greenhouse gas emissions is growing quickly, ground source heat pump systems offer net advantages for urban environments. Standing column well, which exploits groundwater as a heat transfer fluid, requires less space and is less expensive than traditional closed-loop ground heat exchangers. However, a lack of information regarding standing column well is observed, especially in terms of interference with neighboring systems. A semi-regional finite element model was thus developed to emulate the thermal and hydraulic behavior of several standing column wells operated in an area of the City of Montreal. Five municipal and residential buildings were considered, with a total of 14 standing column wells and 5 injection wells. Numerical simulations indicate that infrastructure, such as buildings and roads, have a greater effect on increasing ground temperature than standing column wells. Results show the viability of each system over 10 years of operation without noticeable performance degradation and environmental impacts. Results also indicate that thermal modifications in the ground have a wider and greater extent than hydraulic modifications and decreases rapidly with depth. The study demonstrates that the operation of those systems in an urban context is viable in short and mid-term.
© 2021\n
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\n \n\n \n \n \n \n \n \n Experimental and numerical study of square HSS BIEs under cyclic loading.\n \n \n \n \n\n\n \n Gonzalez Urena, A.; Tremblay, R.; and Rogers, C. A.\n\n\n \n\n\n\n Engineering Structures, 252. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20215111355510 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental and numerical study of square HSS BIEs under cyclic loading},\njournal = {Engineering Structures},\nauthor = {Gonzalez Urena, Andres and Tremblay, Robert and Rogers, Colin A.},\nvolume = {252},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Braces with Intentional Eccentricity (BIEs) have recently been introduced as an alternative to traditional Concentrically Loaded Braces (CLBs) whose performance may overcome some of the shortcomings of the latter. It is postulated that the onset of local buckling in BIEs is delayed owing to a more even distribution of the strain demands under compression loading. Further, the significant post-yielding stiffness of the system can provide control over the predicted displacement levels under the action of the design earthquake. In this article, the results of the testing of four full-scale square ASTM A1085 HSS BIE specimens subjected to reversed cyclic loading are presented. The HSS members and eccentricities were selected with the intention of comparing the response of braces complying with and exceeding the CSA S16-14 global and local slenderness limits. The introduction of the eccentricity was achieved by means of side plates linking the HSS to bolted knife and gusset plate assembly connections. The experimental program is expanded and complemented with finite element analyses of additional BIE and CLB models. The experimental and numerical results show that the BIEs’ response displays the purported benefits of the introduction of the eccentricity. However, it was also found that fracture due to the rotational demand under tensile load at the bracing member's ends can govern the failure mode of BIEs that are more resistant to developing local buckling at mid-length. The implications of the results to the design of Frames with Intentionally Eccentric Braces (FIEBs) are discussed.<br/></div> © 2021 Elsevier Ltd},\nkey = {Cyclic loads},\n%keywords = {Earthquake engineering;Steel testing;Earthquakes;},\n%note = {Brace with intentional eccentricity;Compression loading;Design earthquakes;Earthquake-resistant design;Experimental and numerical studies;Local buckling;Performance;Physical testing;Post-yielding;Steel braces;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.113669},\n} \n\n\n
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Braces with Intentional Eccentricity (BIEs) have recently been introduced as an alternative to traditional Concentrically Loaded Braces (CLBs) whose performance may overcome some of the shortcomings of the latter. It is postulated that the onset of local buckling in BIEs is delayed owing to a more even distribution of the strain demands under compression loading. Further, the significant post-yielding stiffness of the system can provide control over the predicted displacement levels under the action of the design earthquake. In this article, the results of the testing of four full-scale square ASTM A1085 HSS BIE specimens subjected to reversed cyclic loading are presented. The HSS members and eccentricities were selected with the intention of comparing the response of braces complying with and exceeding the CSA S16-14 global and local slenderness limits. The introduction of the eccentricity was achieved by means of side plates linking the HSS to bolted knife and gusset plate assembly connections. The experimental program is expanded and complemented with finite element analyses of additional BIE and CLB models. The experimental and numerical results show that the BIEs’ response displays the purported benefits of the introduction of the eccentricity. However, it was also found that fracture due to the rotational demand under tensile load at the bracing member's ends can govern the failure mode of BIEs that are more resistant to developing local buckling at mid-length. The implications of the results to the design of Frames with Intentionally Eccentric Braces (FIEBs) are discussed.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n A Macro-Distinct Element Model (M-DEM) for simulating in-plane/out-of-plane interaction and combined failure mechanisms of unreinforced masonry structures.\n \n \n \n \n\n\n \n Malomo, D.; and DeJong, M. J.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 51(4): 793 - 811. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20215111366761 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Macro-Distinct Element Model (M-DEM) for simulating in-plane/out-of-plane interaction and combined failure mechanisms of unreinforced masonry structures},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Malomo, Daniele and DeJong, Matthew J.},\nvolume = {51},\nnumber = {4},\nyear = {2022},\npages = {793 - 811},\nissn = {00988847},\nabstract = {<div data-language="eng" data-ev-field="abstract">In the seismic analysis of unreinforced masonry (URM) structures, the modeling of out-of-plane (OOP) modes and their mechanical interaction with in-plane (IP) loaded components are typically neglected when using simplified numerical methods. Although this may result in unconservative predictions, the high computational expense entailed by more refined approaches is often prohibitive for applied researchers and practitioners. To overcome these limitations, the demonstrated capabilities of a recently developed low-cost Macro-Distinct Element Model (M-DEM) to simulate IP and OOP modes are extended in this work towards the modeling of IP/OOP interaction and combined failure mechanisms of URM assemblies. In the M-DEM framework, shear and flexural damage are accounted for by zero-thickness interface spring layers, whose layout is determined a priori as a function of the masonry texture, while crushing failure is modeled through homogenized finite element macro-blocks. To adapt and validate this M-DEM scheme to model IP/OOP interaction, past experiments on full-scale C-, U-, and I-shaped URM specimens tested under quasi-static loading were simulated. The shake-table response of a full-scale C-shaped URM assembly with openings was also numerically simulated up to collapse, representing a major improvement over previous macro-element methods. After the comparison with experimental tests, a parametric investigation of the response of reference URM walls under combined IP/OOP actions was conducted, and the influence of previous IP damage on one- and two-way OOP bending capacity is quantified. This aspect, despite being widely identified as of relevant interest, has only been marginally investigated in previous research, both experimentally and numerically.<br/></div> © 2021 John Wiley & Sons Ltd.},\nkey = {Numerical methods},\n%keywords = {Failure (mechanical);Textures;Masonry materials;},\n%note = {Combined failure;Distinct element methods;Distinct element modeling;Failure mechanism;Finite-distinct element method;In-plane;Interaction;Macro element;Out-of-plane;Unreinforced masonries (URMs);},\nURL = {http://dx.doi.org/10.1002/eqe.3591},\n} \n\n\n
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In the seismic analysis of unreinforced masonry (URM) structures, the modeling of out-of-plane (OOP) modes and their mechanical interaction with in-plane (IP) loaded components are typically neglected when using simplified numerical methods. Although this may result in unconservative predictions, the high computational expense entailed by more refined approaches is often prohibitive for applied researchers and practitioners. To overcome these limitations, the demonstrated capabilities of a recently developed low-cost Macro-Distinct Element Model (M-DEM) to simulate IP and OOP modes are extended in this work towards the modeling of IP/OOP interaction and combined failure mechanisms of URM assemblies. In the M-DEM framework, shear and flexural damage are accounted for by zero-thickness interface spring layers, whose layout is determined a priori as a function of the masonry texture, while crushing failure is modeled through homogenized finite element macro-blocks. To adapt and validate this M-DEM scheme to model IP/OOP interaction, past experiments on full-scale C-, U-, and I-shaped URM specimens tested under quasi-static loading were simulated. The shake-table response of a full-scale C-shaped URM assembly with openings was also numerically simulated up to collapse, representing a major improvement over previous macro-element methods. After the comparison with experimental tests, a parametric investigation of the response of reference URM walls under combined IP/OOP actions was conducted, and the influence of previous IP damage on one- and two-way OOP bending capacity is quantified. This aspect, despite being widely identified as of relevant interest, has only been marginally investigated in previous research, both experimentally and numerically.
© 2021 John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Shear Strength of Short Rectangular Bridge Columns.\n \n \n \n \n\n\n \n Massa, R. J.; Shemy, O.; Cook, W. D.; and Mitchell, D.\n\n\n \n\n\n\n Journal of Bridge Engineering, 27(2). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ShearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20215111364149 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shear Strength of Short Rectangular Bridge Columns},\njournal = {Journal of Bridge Engineering},\nauthor = {Massa, Rico J. and Shemy, Omar and Cook, William D. and Mitchell, Denis},\nvolume = {27},\nnumber = {2},\nyear = {2022},\nissn = {10840702},\nabstract = {<div data-language="eng" data-ev-field="abstract">Four short shear-critical rectangular columns were constructed and tested under monotonic shear loading and a constant compressive axial load. The main variable in these tests was the amount of shear reinforcement. The objectives were to examine the behavior of columns with small shear span-to-depth ratios and develop a method for predicting the shear strength of such columns. An inclined compressive strut was found to form between the column ends and contribute to the column shear capacity. The observed column responses were compared with predictions made using sectional analyses, combined strut and compression field models, and nonlinear finite-element analyses. Failure shears predicted by the sectional analyses were conservative. The proposed model, which considers the contribution of strut action gave reasonable estimates of the shear strength with Vexp/Vpred varying from 0.93 to 1.00. Nonlinear finite-element analysis gave accurate predictions of shear strength, as well as predictions of the complete behavior of the columns. It was determined that the strut effect is significant for reinforced axially loaded columns with shear span-to-depth ratios of less than about 2.5 but should not be considered if the columns undergo large deflections.<br/></div> © 2021 American Society of Civil Engineers.},\nkey = {Shear flow},\n%keywords = {Struts;Reinforcement;Compressive strength;Finite element method;Forecasting;},\n%note = {Bridge columns;Column shear capacity;Compressive axial load;Monotonics;Sectional analysis;Shear critical;Shear loadings;Shear reinforcement;Shear span-to-depth ratios;Shears strength;},\nURL = {http://dx.doi.org/10.1061/(ASCE)BE.1943-5592.0001824},\n} \n\n\n
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Four short shear-critical rectangular columns were constructed and tested under monotonic shear loading and a constant compressive axial load. The main variable in these tests was the amount of shear reinforcement. The objectives were to examine the behavior of columns with small shear span-to-depth ratios and develop a method for predicting the shear strength of such columns. An inclined compressive strut was found to form between the column ends and contribute to the column shear capacity. The observed column responses were compared with predictions made using sectional analyses, combined strut and compression field models, and nonlinear finite-element analyses. Failure shears predicted by the sectional analyses were conservative. The proposed model, which considers the contribution of strut action gave reasonable estimates of the shear strength with Vexp/Vpred varying from 0.93 to 1.00. Nonlinear finite-element analysis gave accurate predictions of shear strength, as well as predictions of the complete behavior of the columns. It was determined that the strut effect is significant for reinforced axially loaded columns with shear span-to-depth ratios of less than about 2.5 but should not be considered if the columns undergo large deflections.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Experimental and numerical investigations of dam break flow over dry and wet beds.\n \n \n \n \n\n\n \n Garoosi, F.; Nicole Mellado-Cusicahua, A.; Shademani, M.; and Shakibaeinia, A.\n\n\n \n\n\n\n International Journal of Mechanical Sciences, 215. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20215011313354 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental and numerical investigations of dam break flow over dry and wet beds},\njournal = {International Journal of Mechanical Sciences},\nauthor = {Garoosi, Faroogh and Nicole Mellado-Cusicahua, Andrea and Shademani, Maryam and Shakibaeinia, Ahmad},\nvolume = {215},\nyear = {2022},\nissn = {00207403},\nabstract = {<div data-language="eng" data-ev-field="abstract">Within the present work, the dam break flow over dry and wet beds are investigated experimentally, aiming to provide up-to-date data set and deeper insight into the morphology and hydrodynamics of the dam-break flood wave. The experiments are performed in a smooth prismatic channel with a rectangular cross-section. The wave profile and the downstream impact pressures are captured by a high-speed camera and several pressure sensors, respectively. The water depth is measured at five specified downstream locations through imaging processing. The laboratory observations are presented in terms of non-dimensional water level height, dynamic pressure variations on the impact wall, free-surface evolution, wave-front propagation, and high-resolution videos. Furthermore, two different numerical methods namely: (1) Volume-Of-Fluid (VOF) and (2) Moving Particle Semi Implicit (MPS) are also utilized to verify the repeatability of the experimental measurements. The comparisons show a satisfactory agreement between both models and the experiments. However, the results reveal that the Lagrangian model (MPS) slightly outperformed the standard VOF model in tracking highly deforming interfaces with severe topology changes. The dataset generated by small-scale laboratory investigations in the current work can provide a full panoramic view of dam-break flow which may be used as benchmark for validation of various CFD tools or understand the complex physics of dam-break wave and similar phenomena.<br/></div> © 2021 Elsevier Ltd},\nkey = {Water levels},\n%keywords = {Computational fluid dynamics;Dams;Lagrange multipliers;Wavefronts;Morphology;Numerical methods;Numerical models;High speed cameras;Topology;},\n%note = {'Dry' [;Dam-break flow;Dam-breaks;Dry and wet;Dry bed;Experimental investigations;Experimental study;Free-surface flow;Moving particle semi-implicit;Wet bed;},\nURL = {http://dx.doi.org/10.1016/j.ijmecsci.2021.106946},\n} \n\n\n
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Within the present work, the dam break flow over dry and wet beds are investigated experimentally, aiming to provide up-to-date data set and deeper insight into the morphology and hydrodynamics of the dam-break flood wave. The experiments are performed in a smooth prismatic channel with a rectangular cross-section. The wave profile and the downstream impact pressures are captured by a high-speed camera and several pressure sensors, respectively. The water depth is measured at five specified downstream locations through imaging processing. The laboratory observations are presented in terms of non-dimensional water level height, dynamic pressure variations on the impact wall, free-surface evolution, wave-front propagation, and high-resolution videos. Furthermore, two different numerical methods namely: (1) Volume-Of-Fluid (VOF) and (2) Moving Particle Semi Implicit (MPS) are also utilized to verify the repeatability of the experimental measurements. The comparisons show a satisfactory agreement between both models and the experiments. However, the results reveal that the Lagrangian model (MPS) slightly outperformed the standard VOF model in tracking highly deforming interfaces with severe topology changes. The dataset generated by small-scale laboratory investigations in the current work can provide a full panoramic view of dam-break flow which may be used as benchmark for validation of various CFD tools or understand the complex physics of dam-break wave and similar phenomena.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Development and application of multi-axis hybrid simulation for seismic stability of steel braced frames.\n \n \n \n \n\n\n \n Imanpour, A.; Tremblay, R.; Leclerc, M.; Siguier, R.; Toutant, G.; Balazadeh Minouei, Y.; and You, S.\n\n\n \n\n\n\n Engineering Structures, 252. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"DevelopmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20215011327524 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Development and application of multi-axis hybrid simulation for seismic stability of steel braced frames},\njournal = {Engineering Structures},\nauthor = {Imanpour, Ali and Tremblay, Robert and Leclerc, Martin and Siguier, Romain and Toutant, Guillaume and Balazadeh Minouei, Yasaman and You, Shawn},\nvolume = {252},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents the development and application of multi-axis pseudo-dynamic hybrid simulation for evaluating the seismic stability of steel braced frame structures. The advanced hybrid testing system used to perform hybrid simulation is first described, followed by the development of hybrid simulation and main challenges, namely the friction forces generated in the testing system and high-frequency noise in force feedback signals. The strategies proposed to overcome these challenges are then described. Two pseudo-dynamic hybrid simulations consisting of a two-tiered concentrically braced frame where a full-scale wide-flange column part of the frame is physically tested while the rest of the frame is numerically analysed are finally presented. The test results serve to verify the hybrid simulation technique, evaluate experimentally the seismic stability response of columns of steel multi-tiered concentrically braced frames and validate the findings of past fibre-based numerical models used to assess the seismic response of multi-tiered braced frames.<br/></div> © 2021 Elsevier Ltd},\nkey = {Steel fibers},\n%keywords = {Seismic response;Steel testing;Structural frames;Friction;Buckling;},\n%note = {Column buckling;Dynamic hybrid simulation;Experimental testing;Hybrid simulation;Multi-Axis;Multi-axis loading;Multi-Axis-;Pseudo-dynamic hybrid simulation;Pseudo-dynamics;Steel braced frames;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.113646},\n} \n\n\n
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This paper presents the development and application of multi-axis pseudo-dynamic hybrid simulation for evaluating the seismic stability of steel braced frame structures. The advanced hybrid testing system used to perform hybrid simulation is first described, followed by the development of hybrid simulation and main challenges, namely the friction forces generated in the testing system and high-frequency noise in force feedback signals. The strategies proposed to overcome these challenges are then described. Two pseudo-dynamic hybrid simulations consisting of a two-tiered concentrically braced frame where a full-scale wide-flange column part of the frame is physically tested while the rest of the frame is numerically analysed are finally presented. The test results serve to verify the hybrid simulation technique, evaluate experimentally the seismic stability response of columns of steel multi-tiered concentrically braced frames and validate the findings of past fibre-based numerical models used to assess the seismic response of multi-tiered braced frames.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Inelastic seismic shear amplification due to higher mode effects in reinforced concrete coupled walls.\n \n \n \n \n\n\n \n Rivard, G.; Ambroise, S.; and Paultre, P.\n\n\n \n\n\n\n Earthquake Spectra, 38(2): 1357 - 1381. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"InelasticPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214911278279 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Inelastic seismic shear amplification due to higher mode effects in reinforced concrete coupled walls},\njournal = {Earthquake Spectra},\nauthor = {Rivard, Gabriel and Ambroise, Steeve and Paultre, Patrick},\nvolume = {38},\nnumber = {2},\nyear = {2022},\npages = {1357 - 1381},\nissn = {87552930},\nabstract = {<div data-language="eng" data-ev-field="abstract">Recent numerical and experimental studies on reinforced concrete shear walls and coupled walls have shown shear forces greater than expected when the walls are subjected to earthquakes at an intensity level that does not exceed the design values. This amplification of shear forces is attributable to the effects of higher modes after the walls develop a plastic hinge at the base. These effects have been recently recognized in North American design codes for cantilever walls and is currently neglected in the design of ductile coupled walls. As part of the research program described in this article, a parametric study was carried out on coupled wall systems to identify the geometric and physical parameters having the greatest influence on the seismic shear amplification. Using the results of this parametric study, an extensive numerical study was conducted on classes of ductile coupled walls subjected to seismic excitation representative of Western and Eastern Canada. This extensive study led to the establishment of shear amplification prediction equations for use in building codes.<br/></div> © The Author(s) 2021.},\nkey = {Reinforced concrete},\n%keywords = {Shear flow;Seismology;Shear walls;Building codes;Codes (symbols);Seismic design;},\n%note = {Capacity design;Coupled walls;Higher-mode effects;Linear time;Non linear;Non linear time history analyse;Parametric study;Shear amplification;Shear force;Time history analysis;},\nURL = {http://dx.doi.org/10.1177/87552930211053347},\n} \n\n\n
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Recent numerical and experimental studies on reinforced concrete shear walls and coupled walls have shown shear forces greater than expected when the walls are subjected to earthquakes at an intensity level that does not exceed the design values. This amplification of shear forces is attributable to the effects of higher modes after the walls develop a plastic hinge at the base. These effects have been recently recognized in North American design codes for cantilever walls and is currently neglected in the design of ductile coupled walls. As part of the research program described in this article, a parametric study was carried out on coupled wall systems to identify the geometric and physical parameters having the greatest influence on the seismic shear amplification. Using the results of this parametric study, an extensive numerical study was conducted on classes of ductile coupled walls subjected to seismic excitation representative of Western and Eastern Canada. This extensive study led to the establishment of shear amplification prediction equations for use in building codes.
© The Author(s) 2021.\n
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\n \n\n \n \n \n \n \n \n Bond performance of tensile lap-spliced basalt-FRP reinforcement in high-strength concrete beams.\n \n \n \n \n\n\n \n Eltantawi, I.; Alnahhal, W.; El Refai, A.; Younis, A.; Alnuaimi, N.; and Kahraman, R.\n\n\n \n\n\n\n Composite Structures, 281. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"BondPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214911258953 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Bond performance of tensile lap-spliced basalt-FRP reinforcement in high-strength concrete beams},\njournal = {Composite Structures},\nauthor = {Eltantawi, Islam and Alnahhal, Wael and El Refai, Ahmed and Younis, Adel and Alnuaimi, Nasser and Kahraman, Ramazan},\nvolume = {281},\nyear = {2022},\nissn = {02638223},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper investigates the bond between high-strength concrete (HSC) and tensile lap-spliced basalt fiber-reinforced polymer (BFRP) bars. Ten large-scale BFRP-reinforced concrete beams (300 × 450 × 3900 mm) were fabricated and tested under four-point loading until failure. The parameters investigated included the BFRP bar diameter (10, 12, and 16 mm), the splice length (400–1200 mm range), and the bar surface texture (sand-coated (SC) and helically wrapped (HW)). Test results demonstrated that the flexural capacity of the beams reinforced with SC-BFRP bars was almost similar to that of beams reinforced with HW-BFRP bars. However, SC-BFRP bars showed a slightly higher bond with concrete compared to that of helically wrapped counterparts. The bond strength of spliced BFRP bars was inversely related to the splice length. Also, BFRP bars with larger diameter bars require longer splice lengths to reach their maximum capacity. Finally, the experimentally estimated critical splice lengths were compared to those calculated by existing models and code-based equations. Both ACI 440.1R-15 and CSA S806-12 provisions were conservative in predicting splice length for BFRP bars. However, the CSA-S6-14 design code was more accurate in estimating the splice length for BFRP with bigger diameters. Though, it was not conservative with smaller diameters.<br/></div> © 2021 The Authors},\nkey = {Basalt},\n%keywords = {Fiber reinforced plastics;Textures;High performance concrete;Reinforced concrete;Concrete beams and girders;Tensile strength;},\n%note = {Basalt fiber;Basalt fiber reinforced polymer bar;Bond;Fiber reinforced polymer;Fiber-reinforced polymers;Fibre reinforced polymers;High strength concretes;Lap splice;Reinforced concrete beams;},\nURL = {http://dx.doi.org/10.1016/j.compstruct.2021.114987},\n} \n\n\n
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This paper investigates the bond between high-strength concrete (HSC) and tensile lap-spliced basalt fiber-reinforced polymer (BFRP) bars. Ten large-scale BFRP-reinforced concrete beams (300 × 450 × 3900 mm) were fabricated and tested under four-point loading until failure. The parameters investigated included the BFRP bar diameter (10, 12, and 16 mm), the splice length (400–1200 mm range), and the bar surface texture (sand-coated (SC) and helically wrapped (HW)). Test results demonstrated that the flexural capacity of the beams reinforced with SC-BFRP bars was almost similar to that of beams reinforced with HW-BFRP bars. However, SC-BFRP bars showed a slightly higher bond with concrete compared to that of helically wrapped counterparts. The bond strength of spliced BFRP bars was inversely related to the splice length. Also, BFRP bars with larger diameter bars require longer splice lengths to reach their maximum capacity. Finally, the experimentally estimated critical splice lengths were compared to those calculated by existing models and code-based equations. Both ACI 440.1R-15 and CSA S806-12 provisions were conservative in predicting splice length for BFRP bars. However, the CSA-S6-14 design code was more accurate in estimating the splice length for BFRP with bigger diameters. Though, it was not conservative with smaller diameters.
© 2021 The Authors\n
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\n \n\n \n \n \n \n \n \n Flexural response of reinforced concrete continuous beams strengthened with fiber-reinforced cementitious matrix (FRCM).\n \n \n \n \n\n\n \n Mandor, A.; and El Refai, A.\n\n\n \n\n\n\n Engineering Structures, 251. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"FlexuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214711193645 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Flexural response of reinforced concrete continuous beams strengthened with fiber-reinforced cementitious matrix (FRCM)},\njournal = {Engineering Structures},\nauthor = {Mandor, Ahmed and El Refai, Ahmed},\nvolume = {251},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper reports on the efficiency of fabric reinforced cementitious matrix (FRCM) composites in enhancing the flexural and deformation capacity of continuous reinforced concrete (RC) beams. The experimental program consisted of eight two-span RC beams having flexural deficiency in either their hogging or their sagging sections. The amount of internal steel reinforcement in the strengthened sections was 50% of that of the unstrengthened sections. The deficient sections were strengthened with one, two, or four plies of Polyparaphenylene Benzobisoxazole (PBO) FRCM system. The obtained results indicated that strengthening with FRCM systems improved the stiffness and the load-carrying capacity of the tested beams with an insignificant loss in their ductility. Increasing the number of FRCM layers increased the yielding and ultimate capacity up to 52 and 11% for beams strengthened in their hogging regions and up to 26 and 30% for those strengthened in their sagging sections, respectively. The obtained results confirmed the ability of the FRCM-strengthened sections to efficiently redistribute the flexural moments after the formation of the plastic hinges. The moment redistribution ratio decreased with the increase in the number of FRCM layers used. This ratio varied between 65 and 84% for beams strengthened with one and two FRCM layers and between 42 and 51% for those strengthened with four layers. These results suggested the revision of the provisions of both CSA and ACI codes and design guidelines, which prohibited the moment redistribution between the critical sections in RC strengthened elements.<br/></div> © 2021 Elsevier Ltd},\nkey = {Reinforced concrete},\n%keywords = {Ductility;Strengthening (metal);Concrete beams and girders;},\n%note = {Cementitious matrices;Continuous beams;Fabric reinforced cementitious matrix;Fibre-reinforced;Matrix layers;Moment redistribution;Plastic hinges;Reinforced concrete beams;Strengthening;Textile-reinforced mortars;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.113557},\n} \n\n\n
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This paper reports on the efficiency of fabric reinforced cementitious matrix (FRCM) composites in enhancing the flexural and deformation capacity of continuous reinforced concrete (RC) beams. The experimental program consisted of eight two-span RC beams having flexural deficiency in either their hogging or their sagging sections. The amount of internal steel reinforcement in the strengthened sections was 50% of that of the unstrengthened sections. The deficient sections were strengthened with one, two, or four plies of Polyparaphenylene Benzobisoxazole (PBO) FRCM system. The obtained results indicated that strengthening with FRCM systems improved the stiffness and the load-carrying capacity of the tested beams with an insignificant loss in their ductility. Increasing the number of FRCM layers increased the yielding and ultimate capacity up to 52 and 11% for beams strengthened in their hogging regions and up to 26 and 30% for those strengthened in their sagging sections, respectively. The obtained results confirmed the ability of the FRCM-strengthened sections to efficiently redistribute the flexural moments after the formation of the plastic hinges. The moment redistribution ratio decreased with the increase in the number of FRCM layers used. This ratio varied between 65 and 84% for beams strengthened with one and two FRCM layers and between 42 and 51% for those strengthened with four layers. These results suggested the revision of the provisions of both CSA and ACI codes and design guidelines, which prohibited the moment redistribution between the critical sections in RC strengthened elements.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Collapse analysis of the multi-span reinforced concrete arch bridge of Caprigliola, Italy.\n \n \n \n \n\n\n \n Scattarreggia, N.; Salomone, R.; Moratti, M.; Malomo, D.; Pinho, R.; and Calvi, G. M.\n\n\n \n\n\n\n Engineering Structures, 251. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"CollapsePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214711183757 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Collapse analysis of the multi-span reinforced concrete arch bridge of Caprigliola, Italy},\njournal = {Engineering Structures},\nauthor = {Scattarreggia, Nicola and Salomone, Roberto and Moratti, Matteo and Malomo, Daniele and Pinho, Rui and Calvi, Gian Michele},\nvolume = {251},\nyear = {2022},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">On April 2020, the 260 m-long reinforced concrete (RC) arch bridge of Caprigliola (Massa and Carrara, Italy) suddenly collapsed into the Magra river. In this work, aimed at investigating potential reasons behind the observed failure, a numerical study is conducted using the Applied Element Method (AEM), which allows the explicitly modelling of damage propagation and progressive failure up until complete collapse. Both local and global models of varying levels of detail have been developed and the consequences of different possible failure scenarios induced by selected potential triggering factors are compared with publicly available forensic evidence. Although only cross-correlations against future official post-collapse reports, currently not available, might permit the establishment of more definitive conclusions on the causes behind the observed collapse of the bridge, a seemingly good agreement was nonetheless found between predicted and observed damage and debris distribution for one of the modelled scenarios (induced movements of one of the bridge piers/abutments), which may thus be deemed as potentially more plausible than the others.<br/></div> © 2021 Elsevier Ltd},\nkey = {Reinforced concrete},\n%keywords = {Concrete construction;Arch bridges;Arches;Forensic engineering;Numerical methods;},\n%note = {Applied element method;Collapse analysis;Concrete arch bridges;Damage propagation;Element method;Local model;Multi-spans;Progressive failure;Propagation failure;Reinforced concrete arch bridge;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.113375},\n} \n\n\n
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On April 2020, the 260 m-long reinforced concrete (RC) arch bridge of Caprigliola (Massa and Carrara, Italy) suddenly collapsed into the Magra river. In this work, aimed at investigating potential reasons behind the observed failure, a numerical study is conducted using the Applied Element Method (AEM), which allows the explicitly modelling of damage propagation and progressive failure up until complete collapse. Both local and global models of varying levels of detail have been developed and the consequences of different possible failure scenarios induced by selected potential triggering factors are compared with publicly available forensic evidence. Although only cross-correlations against future official post-collapse reports, currently not available, might permit the establishment of more definitive conclusions on the causes behind the observed collapse of the bridge, a seemingly good agreement was nonetheless found between predicted and observed damage and debris distribution for one of the modelled scenarios (induced movements of one of the bridge piers/abutments), which may thus be deemed as potentially more plausible than the others.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Modeling of supplemental bar-mounted fiber optic strain sensor for structural health monitoring applications.\n \n \n \n \n\n\n \n Rahmatian, A.; Saleem, H.; Bagchi, A.; Nokken, M.; and Galal, K.\n\n\n \n\n\n\n Journal of Testing and Evaluation, 50(2). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ModelingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214010980519 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modeling of supplemental bar-mounted fiber optic strain sensor for structural health monitoring applications},\njournal = {Journal of Testing and Evaluation},\nauthor = {Rahmatian, Arash and Saleem, Hussam and Bagchi, Ashutosh and Nokken, Michelle and Galal, Khaled},\nvolume = {50},\nnumber = {2},\nyear = {2022},\nissn = {00903973},\nabstract = {<div data-language="eng" data-ev-field="abstract">Fiber optic sensors have been increasingly utilized in structural health monitoring of large-scale civil structures. Bare fiber sensors are quite brittle, and therefore, their installation and embed-ment in reinforced concrete elements can be challenging, particularly when using uncommon materials as internal reinforcements in concrete. In the present study, a fiber optic strain sensor is preinstalled on a supplemental bar of adequate length and appropriate diameter. The sensor is attached to a glass fiber-reinforced polymer (GFRP) reinforcing bar in concrete flexural element. Performance under static-loading conditions has been evaluated, and the results have shown potential toward applying the technique to large-scale structures. Another objective of the present study is to develop a numerical model that represents the interaction between the concrete, the reinforcement steel, and the supplemental GFRP rebar, which has the sensor mounted on. The model is calibrated using experimental results. The model can be used to investigate varying parameters including material properties (e.g., compressive strength of concrete), geometrical data (e.g., the length of the supplemental rebar), and loading and boundary conditions, consequently eliminating the need to perform a large number of full-scale costly experiments. The developed model exhibited nearly identical behavior to the experiments after calibration. The study shows that the performance of the present sensing system is primarily affected by the relative sizes of the main and supplemental bars.<br/></div> Copyright © 2021 by ASTM International, 100 Barr Harbor Drive},\nkey = {Numerical models},\n%keywords = {Structural health monitoring;Fiber reinforced concrete;Digital storage;Fiber optic sensors;Fiber optics;Forensic engineering;Compressive strength;Concrete beams and girders;Fiber reinforced plastics;Fibers;},\n%note = {Concrete beam;Fiber optic strain sensor;Fiber-reinforced polymers;Fibre reinforced polymers;Fibre-optic sensor;Glassfiber reinforced polymers (GFRP);Health monitoring;Monitoring applications;Performance;Sensor;},\nURL = {http://dx.doi.org/10.1520/JTE20200661},\n} \n\n\n
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Fiber optic sensors have been increasingly utilized in structural health monitoring of large-scale civil structures. Bare fiber sensors are quite brittle, and therefore, their installation and embed-ment in reinforced concrete elements can be challenging, particularly when using uncommon materials as internal reinforcements in concrete. In the present study, a fiber optic strain sensor is preinstalled on a supplemental bar of adequate length and appropriate diameter. The sensor is attached to a glass fiber-reinforced polymer (GFRP) reinforcing bar in concrete flexural element. Performance under static-loading conditions has been evaluated, and the results have shown potential toward applying the technique to large-scale structures. Another objective of the present study is to develop a numerical model that represents the interaction between the concrete, the reinforcement steel, and the supplemental GFRP rebar, which has the sensor mounted on. The model is calibrated using experimental results. The model can be used to investigate varying parameters including material properties (e.g., compressive strength of concrete), geometrical data (e.g., the length of the supplemental rebar), and loading and boundary conditions, consequently eliminating the need to perform a large number of full-scale costly experiments. The developed model exhibited nearly identical behavior to the experiments after calibration. The study shows that the performance of the present sensing system is primarily affected by the relative sizes of the main and supplemental bars.
Copyright © 2021 by ASTM International, 100 Barr Harbor Drive\n
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\n \n\n \n \n \n \n \n \n Impact of initial stress field heterogeneity in dynamic soil–structure interaction.\n \n \n \n \n\n\n \n Rioux, M.; Nollet, M.; and Galy, B.\n\n\n \n\n\n\n Earthquake Spectra, 38(1): 358 - 383. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213610872255 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact of initial stress field heterogeneity in dynamic soil–structure interaction},\njournal = {Earthquake Spectra},\nauthor = {Rioux, Marc-Denis and Nollet, Marie-Jose and Galy, Bertrand},\nvolume = {38},\nnumber = {1},\nyear = {2022},\npages = {358 - 383},\nissn = {87552930},\nabstract = {<div data-language="eng" data-ev-field="abstract">This article covers the impact of soil initial stress field heterogeneity (ISFH) in wave-passage analysis and in prescribed structural acceleration in the context of dynamic soil–structure interaction (DSSI) analysis. ISFH is directly related to the natural behavior of soil where a significant increase in net effective confinement, as is the case in the foundation soil under a building, tends to increase the soil’s modulus and strain. This creates a heterogeneous stress field in the vicinity of the foundation elements, which results in a modification of the dynamic behavior of the soil–structure system. A simple method for considering the impact of ISFH on the value of the soil’s modulus and strain was developed using the direct DSSI approach. The method was used to analyze numerical artifacts and its impact on the surface acceleration values of a nonlinear two-dimensional (2D) numerical soil deposit under transient loading. This analysis was followed by a sample application for a three-story, three-bay concrete moment-resisting frame structure erected on a deep soil deposit. Floor acceleration and relative displacement were used for comparison. The soil deposit was modeled using the typical geotechnical properties of fine-grained, post-glacial soil samples obtained in Eastern Canada from in situ geotechnical borehole drilling, geophysical surveys, and laboratory testing. Ground motion was based on eastern calibrated seismic signals. The results of the soil deposit analysis show that ISFH had a significant impact on surface acceleration values. The effect was found to be period-dependent and to have a direct impact on prescribed acceleration values at the base of structure. Thus, failure to take the effects of ISFH into consideration can lead to errors in calculating prescribed structural accelerations (i.e. over- or underestimation).<br/></div> © The Author(s) 2021.},\nkey = {Soils},\n%keywords = {Soil testing;Structural frames;Numerical methods;Finite element method;Deposits;Acceleration;Glacial geology;Stresses;},\n%note = {Effective confinements;Geotechnical properties;Initial stress field;Moment resisting frames;Relative displacement;Structural acceleration;Surface acceleration;Two Dimensional (2 D);},\nURL = {http://dx.doi.org/10.1177/87552930211041640},\n} \n\n\n
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This article covers the impact of soil initial stress field heterogeneity (ISFH) in wave-passage analysis and in prescribed structural acceleration in the context of dynamic soil–structure interaction (DSSI) analysis. ISFH is directly related to the natural behavior of soil where a significant increase in net effective confinement, as is the case in the foundation soil under a building, tends to increase the soil’s modulus and strain. This creates a heterogeneous stress field in the vicinity of the foundation elements, which results in a modification of the dynamic behavior of the soil–structure system. A simple method for considering the impact of ISFH on the value of the soil’s modulus and strain was developed using the direct DSSI approach. The method was used to analyze numerical artifacts and its impact on the surface acceleration values of a nonlinear two-dimensional (2D) numerical soil deposit under transient loading. This analysis was followed by a sample application for a three-story, three-bay concrete moment-resisting frame structure erected on a deep soil deposit. Floor acceleration and relative displacement were used for comparison. The soil deposit was modeled using the typical geotechnical properties of fine-grained, post-glacial soil samples obtained in Eastern Canada from in situ geotechnical borehole drilling, geophysical surveys, and laboratory testing. Ground motion was based on eastern calibrated seismic signals. The results of the soil deposit analysis show that ISFH had a significant impact on surface acceleration values. The effect was found to be period-dependent and to have a direct impact on prescribed acceleration values at the base of structure. Thus, failure to take the effects of ISFH into consideration can lead to errors in calculating prescribed structural accelerations (i.e. over- or underestimation).
© The Author(s) 2021.\n
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\n \n\n \n \n \n \n \n \n Seismic fragility of bridges: An approach coupling multiple-stripe analysis and Gaussian mixture for multicomponent structures.\n \n \n \n \n\n\n \n Conde Bandini, P. A.; Padgett, J. E.; Paultre, P.; and Siqueira, G. H.\n\n\n \n\n\n\n Earthquake Spectra, 38(1): 254 - 282. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213410804137 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic fragility of bridges: An approach coupling multiple-stripe analysis and Gaussian mixture for multicomponent structures},\njournal = {Earthquake Spectra},\nauthor = {Conde Bandini, Pedro Alexandre and Padgett, Jamie Ellen and Paultre, Patrick and Siqueira, Gustavo Henrique},\nvolume = {38},\nnumber = {1},\nyear = {2022},\npages = {254 - 282},\nissn = {87552930},\nabstract = {<div data-language="eng" data-ev-field="abstract">An approach is developed to build multivariate probabilistic seismic demand models (PSDMs) of multicomponent structures based on the coupling of multiple-stripe analysis and Gaussian mixture models. The proposed methodology is eminently flexible in terms of adopted assumptions, and a classic highway bridge in Eastern Canada is used to present an application of the new approach and to investigate its impact on seismic fragility analysis. Traditional PSDM methods employ lognormal distribution and linear correlation between pairs of components to fit the seismic response data, which may lead to poor statistical modeling. Using ground motion records rigorously selected for the investigated site, data are generated via response history analysis, and appropriate statistical tests are then performed to show that these hypotheses are not always valid on the response data of the case-study bridge. The clustering feature of the proposed methodology allows the construction of a multivariate PSDM with refined fitting to the correlated response data, introducing low bias into the fragility functions and mean annual frequency of violating damage states, which are crucial features for decision making in the context of performance-based seismic engineering.<br/></div> © The Author(s) 2021.},\nkey = {Gaussian distribution},\n%keywords = {Earthquake effects;Bridges;Decision making;Seismic response;},\n%note = {Gaussian Mixture Model;Log-normal distribution;Multi-component structures;Performance Based Seismic Engineering;Probabilistic seismic demand models;Response history analysis;Seismic fragility analysis;Statistical modeling;},\nURL = {http://dx.doi.org/10.1177/87552930211036164},\n} \n\n\n
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An approach is developed to build multivariate probabilistic seismic demand models (PSDMs) of multicomponent structures based on the coupling of multiple-stripe analysis and Gaussian mixture models. The proposed methodology is eminently flexible in terms of adopted assumptions, and a classic highway bridge in Eastern Canada is used to present an application of the new approach and to investigate its impact on seismic fragility analysis. Traditional PSDM methods employ lognormal distribution and linear correlation between pairs of components to fit the seismic response data, which may lead to poor statistical modeling. Using ground motion records rigorously selected for the investigated site, data are generated via response history analysis, and appropriate statistical tests are then performed to show that these hypotheses are not always valid on the response data of the case-study bridge. The clustering feature of the proposed methodology allows the construction of a multivariate PSDM with refined fitting to the correlated response data, introducing low bias into the fragility functions and mean annual frequency of violating damage states, which are crucial features for decision making in the context of performance-based seismic engineering.
© The Author(s) 2021.\n
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\n \n\n \n \n \n \n \n \n Evaluation of Reinforced Concrete T-Beams Retrofitted in Shear with Mechanically Anchored Dry Carbon Fiber Sheets.\n \n \n \n \n\n\n \n El-Tahan, M.; Hassanein, A.; Megid, W.; and Galal, K.\n\n\n \n\n\n\n Experimental Techniques, 46(4): 647 - 660. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"EvaluationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213510828343 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evaluation of Reinforced Concrete T-Beams Retrofitted in Shear with Mechanically Anchored Dry Carbon Fiber Sheets},\njournal = {Experimental Techniques},\nauthor = {El-Tahan, M. and Hassanein, A. and Megid, W.A. and Galal, K.},\nvolume = {46},\nnumber = {4},\nyear = {2022},\npages = {647 - 660},\nissn = {07328818},\nabstract = {<div data-language="eng" data-ev-field="abstract">Externally bonded fiber-reinforced polymer (FRP) composites are commonly used to retrofit concrete beams in shear. However, debonding failure limits the effectiveness of such a system. Mechanically anchored systems eliminate the debonding mode of failure, which maximizes the effectiveness of the retrofit system. This study investigates the effectiveness of using a modified mechanical anchor to strengthen concrete T-beams in shear. The fabrication and design details of this system are discussed. Three reinforced concrete (RC) T-beams were tested up to failure under a four-point bending test to assess the effectiveness of the proposed retrofit system. One beam was tested as a control beam, while two beams were strengthened in shear using mechanically anchored dry carbon fiber (CF) sheets. The tested beams were instrumented with conventional instruments to monitor the load, strain, displacement, and acoustic sensors to monitor the damage initiation, progression, and location. The modified mechanical anchor retrofit system increased the shear capacity by up to 22 %. The acoustic emissions (AE) monitoring of the tested T-beams was able to detect the locations of the cracks that caused the failure of the beams.<br/></div> © 2021, The Society for Experimental Mechanics, Inc.},\nkey = {Retrofitting},\n%keywords = {Concrete beams and girders;Acoustic emission testing;Carbon fibers;Failure (mechanical);Reinforced concrete;Debonding;Carbon fiber reinforced plastics;},\n%note = {Acoustic Sensors;Carbon fiber sheets;Conventional instruments;Damage initiation;Debonding failure;Externally bonded;Fiber reinforced polymer composites;Four-point bending test;},\nURL = {http://dx.doi.org/10.1007/s40799-021-00497-7},\n} \n\n\n
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Externally bonded fiber-reinforced polymer (FRP) composites are commonly used to retrofit concrete beams in shear. However, debonding failure limits the effectiveness of such a system. Mechanically anchored systems eliminate the debonding mode of failure, which maximizes the effectiveness of the retrofit system. This study investigates the effectiveness of using a modified mechanical anchor to strengthen concrete T-beams in shear. The fabrication and design details of this system are discussed. Three reinforced concrete (RC) T-beams were tested up to failure under a four-point bending test to assess the effectiveness of the proposed retrofit system. One beam was tested as a control beam, while two beams were strengthened in shear using mechanically anchored dry carbon fiber (CF) sheets. The tested beams were instrumented with conventional instruments to monitor the load, strain, displacement, and acoustic sensors to monitor the damage initiation, progression, and location. The modified mechanical anchor retrofit system increased the shear capacity by up to 22 %. The acoustic emissions (AE) monitoring of the tested T-beams was able to detect the locations of the cracks that caused the failure of the beams.
© 2021, The Society for Experimental Mechanics, Inc.\n
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\n \n\n \n \n \n \n \n \n Friction Properties at the Contact Interfaces of Overhead Line Aluminium Conductors.\n \n \n \n \n\n\n \n Omrani, A.; Dieng, L.; Langlois, S.; and Van Dyke, P.\n\n\n \n\n\n\n IEEE Transactions on Power Delivery, 37(1): 442 - 448. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"FrictionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211110073263 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Friction Properties at the Contact Interfaces of Overhead Line Aluminium Conductors},\njournal = {IEEE Transactions on Power Delivery},\nauthor = {Omrani, Amine and Dieng, Lamine and Langlois, Sebastien and Van Dyke, Pierre},\nvolume = {37},\nnumber = {1},\nyear = {2022},\npages = {442 - 448},\nissn = {08858977},\nabstract = {<div data-language="eng" data-ev-field="abstract">Overhead conductors may undergo fretting fatigue failures at contact interfaces located at or near the suspension clamps. Some recent experimental studies were carried out on individual wires to understand the fretting fatigue phenomenon. However, the majority of the available results are for the wire-to-wire contact configuration, while little interest has been brought to the wire-to-clamp contact configuration, which is typically a critical interface for conductor fatigue. A new experimental test bench intended to perform fretting fatigue tests on individual strands of overhead conductors is used to study the wire-to-clamp and the wire-to-wire contact configurations. Variable displacement amplitude (VDA) tests under different normal contact forces were carried out on 1350-H19 aluminium wires for both contact types. The experimental results showed a slight difference between the studied contact configurations in terms of the friction coefficient values and the transition sliding amplitude. To complete this analysis, constant displacement amplitude (CDA) tests were carried out sweeping the displacement range and replacing the tested specimen for each test. The resulting contact marks are observed using an optical microscope and a good correlation is found between both types of tests in terms of friction coefficient and transition sliding amplitude. This study allowed characterizing the sliding conditions of wire-to-clamp contact in the context of fretting fatigue of aluminium conductors and is an important step in the development of a method to evaluate the fatigue life of conductors using fretting fatigue tests of individual wire-to-clamp contacts.<br/></div> © 1986-2012 IEEE.},\nkey = {Wire},\n%keywords = {Optical correlation;Friction;Aluminum;Fatigue testing;},\n%note = {Contact interface;Critical interfaces;Displacement amplitudes;Friction coefficients;Friction properties;Normal contact force;Overhead conductors;Variable displacement amplitude;},\nURL = {http://dx.doi.org/10.1109/TPWRD.2021.3062704},\n} \n\n\n\n
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Overhead conductors may undergo fretting fatigue failures at contact interfaces located at or near the suspension clamps. Some recent experimental studies were carried out on individual wires to understand the fretting fatigue phenomenon. However, the majority of the available results are for the wire-to-wire contact configuration, while little interest has been brought to the wire-to-clamp contact configuration, which is typically a critical interface for conductor fatigue. A new experimental test bench intended to perform fretting fatigue tests on individual strands of overhead conductors is used to study the wire-to-clamp and the wire-to-wire contact configurations. Variable displacement amplitude (VDA) tests under different normal contact forces were carried out on 1350-H19 aluminium wires for both contact types. The experimental results showed a slight difference between the studied contact configurations in terms of the friction coefficient values and the transition sliding amplitude. To complete this analysis, constant displacement amplitude (CDA) tests were carried out sweeping the displacement range and replacing the tested specimen for each test. The resulting contact marks are observed using an optical microscope and a good correlation is found between both types of tests in terms of friction coefficient and transition sliding amplitude. This study allowed characterizing the sliding conditions of wire-to-clamp contact in the context of fretting fatigue of aluminium conductors and is an important step in the development of a method to evaluate the fatigue life of conductors using fretting fatigue tests of individual wire-to-clamp contacts.
© 1986-2012 IEEE.\n
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\n \n\n \n \n \n \n \n A Critical Review Analysis of Housing Problems for Indigenous People in North Canada.\n \n \n \n\n\n \n Elshaboury, N.; Al-Sakkaf, A.; Abdelkader, E. M.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 493 - 496, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917118985 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Critical Review Analysis of Housing Problems for Indigenous People in North Canada},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Elshaboury, Nehal and Al-Sakkaf, Abobakr and Abdelkader, Eslam Mohammed and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {493 - 496},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The sustainability of housing is a main issue in the modern world. The United Nations has espoused sustainable development goals to ensure that the resources are applied appropriately and that society can increase. This research will not only contribute to the general goal of sustainability for the societal benefit but also improve sustainability and preservation of Indigenous housing. The major objective of this study is to review the homelessness problem and current housing problems for Indigenous communities of Canada's north. In Canada, a disproportionate number of Indigenous people are homeless, a problem that is particularly acute in the country's north. Furthermore, Indigenous people in Canada live in households with varying locations, conditions, and compositions. These housing stocks face serious challenges because of multiple interconnected factors, such as past colonization, geographic constraints/remoteness, housing policies, and unsustainable housing schemes. Finally, this research presents a framework for dealing with this critical housing problem.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\n%note = {'current;Condition;Critical review;First nations;Housing problem;Indigenous community;Indigenous people;North canada;Societal benefits;United Nations;},\n} \n\n\n
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The sustainability of housing is a main issue in the modern world. The United Nations has espoused sustainable development goals to ensure that the resources are applied appropriately and that society can increase. This research will not only contribute to the general goal of sustainability for the societal benefit but also improve sustainability and preservation of Indigenous housing. The major objective of this study is to review the homelessness problem and current housing problems for Indigenous communities of Canada's north. In Canada, a disproportionate number of Indigenous people are homeless, a problem that is particularly acute in the country's north. Furthermore, Indigenous people in Canada live in households with varying locations, conditions, and compositions. These housing stocks face serious challenges because of multiple interconnected factors, such as past colonization, geographic constraints/remoteness, housing policies, and unsustainable housing schemes. Finally, this research presents a framework for dealing with this critical housing problem.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Comparison Framework for Analyzing of LCC of Structural Health Monitoring: Case Study of Anthony Falls Bridge.\n \n \n \n\n\n \n Eshatti, A.; Algamati, M.; Al-Sakkaf, A.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 335 - 338, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119237 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Comparison Framework for Analyzing of LCC of Structural Health Monitoring: Case Study of Anthony Falls Bridge},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Eshatti, Abdulhakim and Algamati, Mohamed and Al-Sakkaf, Abobakr and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {335 - 338},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The purpose of the bridge's Structural Health Monitoring (SHM) system is to assist and inform operators about the continued suitability of structures in light of the changes that may occur either gradually or suddenly as they perform their various tasks. Ensuring the integrity of the structure is vital and important, as well as having the ability to work in the implementation of the SHM field of the bridge considering all the changes that may occur. Thus, it is also important to make a financial evaluation of the SHM system. This study compared the costs and benefits of the I-35W St. Anthony Falls Bridge for two different cases (i.e., with SHM system and without SHM system). The costs and benefits associated with the full-service life of the bridge were considered in both cases. Various types of costs including capital costs, SHM system costs, routine maintenance costs, anti-icing costs, inspection costs, principal costs and repair costs are considered in this study. A Life Cycle Cost Analysis (LCCA) was performed to compare cases. In this research, 55 and 70 years of bridge service life were considered for bridges without SHM and with SHM, respectively. After LCC analysis, it was found that the Benefit-Cost Ratio (BCR) is 17.5% higher in the case of bridges with SHM compared to bridges without SHM. As a result, the SHM system ensures the safety of the bridge and prevents any occurrence such as bridge collapse. Since of the extension of the bridge's life and safety, the SHM-equipped bridge will be more positive with more safety.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Structural health monitoring},\n%keywords = {Bridges;Causeways;Cost accounting;Cost benefit analysis;},\n%note = {Benefit cost ratios;Bridge structural health monitoring;Case-studies;Cost and benefits;Financial evaluation;Full service;Health monitoring;Life cycle costs analysis;Structural health;Structural health monitoring systems;},\n} \n\n\n
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The purpose of the bridge's Structural Health Monitoring (SHM) system is to assist and inform operators about the continued suitability of structures in light of the changes that may occur either gradually or suddenly as they perform their various tasks. Ensuring the integrity of the structure is vital and important, as well as having the ability to work in the implementation of the SHM field of the bridge considering all the changes that may occur. Thus, it is also important to make a financial evaluation of the SHM system. This study compared the costs and benefits of the I-35W St. Anthony Falls Bridge for two different cases (i.e., with SHM system and without SHM system). The costs and benefits associated with the full-service life of the bridge were considered in both cases. Various types of costs including capital costs, SHM system costs, routine maintenance costs, anti-icing costs, inspection costs, principal costs and repair costs are considered in this study. A Life Cycle Cost Analysis (LCCA) was performed to compare cases. In this research, 55 and 70 years of bridge service life were considered for bridges without SHM and with SHM, respectively. After LCC analysis, it was found that the Benefit-Cost Ratio (BCR) is 17.5% higher in the case of bridges with SHM compared to bridges without SHM. As a result, the SHM system ensures the safety of the bridge and prevents any occurrence such as bridge collapse. Since of the extension of the bridge's life and safety, the SHM-equipped bridge will be more positive with more safety.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n A software approach for analysis and reasoning of urban floods using GIS and SWMM.\n \n \n \n\n\n \n Ghodke, S.; Rangari, V. A.; Bodile, R. M.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 204 - 207, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119201 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A software approach for analysis and reasoning of urban floods using GIS and SWMM},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Ghodke, Sharad and Rangari, Vinay Ashok and Bodile, Roshan M. and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {204 - 207},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Planning of floodplain management is now very difficult in the urban areas as the construction activities at urban centers almost reached its peak. To deal with such situations analyzing the adequacy of the drainage network of vulnerable areas by considering extreme rainfall events is necessary. Further, Hydrologic and hydraulic models capable of producing flood maps may help in reducing the severity of problem. This study presents a simple sophisticated approach to analyze the existing drainage network for a part of Hyderabad, India. Software such as Arc-GIS v10.1 is used to process the preliminary data and create a geodatabase for model development and simulations. The simulation results identified the junction nodes (J9, J12-14, J16, J21, J23, J25-26 of zone XII; J2-4, J8-10, J20 of zone XIII) are surcharged and induce flooding situation in nearby area due to overflowing.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Flood control},\n%keywords = {Drainage;Hydraulic models;Project management;Urban planning;},\n%note = {Construction activities;Drainage networks;Floodplain management;Management IS;Software approach;SWMM, land use;Urban areas;Urban centers;Urban floods;Vulnerable area;},\n} \n\n\n
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Planning of floodplain management is now very difficult in the urban areas as the construction activities at urban centers almost reached its peak. To deal with such situations analyzing the adequacy of the drainage network of vulnerable areas by considering extreme rainfall events is necessary. Further, Hydrologic and hydraulic models capable of producing flood maps may help in reducing the severity of problem. This study presents a simple sophisticated approach to analyze the existing drainage network for a part of Hyderabad, India. Software such as Arc-GIS v10.1 is used to process the preliminary data and create a geodatabase for model development and simulations. The simulation results identified the junction nodes (J9, J12-14, J16, J21, J23, J25-26 of zone XII; J2-4, J8-10, J20 of zone XIII) are surcharged and induce flooding situation in nearby area due to overflowing.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Seismic deficiency due to localized design and construction practices in India: A case study of existing RC building.\n \n \n \n\n\n \n Ghodke, S.; Singh, A.; Dutta, S.; Debnath, N.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 174 - 178, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119343 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic deficiency due to localized design and construction practices in India: A case study of existing RC building},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Ghodke, Sharad and Singh, Abhilash and Dutta, Subhrajit and Debnath, Nirmalendu and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {174 - 178},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study is in the characteristics of a case study. In this study, seismic deficiency evaluation has been made to the G+1 R.C. building and the causes of the damages were investigated. The RCC structure was subjected to Non-destructive Testing (NDT) to assess the structure's properties. The building is located in India. It has some damaged vertical load-bearing elements because of various effects. Response Spectrum Analysis was carried out in the building through Finite Element Analysis (FEM) programs and deficient members were identified based on demand-capacity as well as crack/damage checks were made analytically for the existing damage situation. At the end of the study, it has been observed in some of the columns that load bearing capacities were exceeded due to creep, axial compressive loads and corrosion effects and severe damages occurred. In addition, FEM results coincide with existing building damage. This paper will suggest appropriate measures to be taken for repair and retrofitting of the deficient members so that the building can be strengthened in the upcoming future.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Seismic design},\n%keywords = {Bearings (structural);Concrete buildings;Pressure vessels;},\n%note = {Case-studies;Deficiency analyze;Element models;Finite element modeling;Non destructive testing;Non-destructive testing;Reinforced concrete structures;Response spectrum analyses (RSA);Response spectrum analyze;Seismic deficiencies;},\n} \n\n\n
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This study is in the characteristics of a case study. In this study, seismic deficiency evaluation has been made to the G+1 R.C. building and the causes of the damages were investigated. The RCC structure was subjected to Non-destructive Testing (NDT) to assess the structure's properties. The building is located in India. It has some damaged vertical load-bearing elements because of various effects. Response Spectrum Analysis was carried out in the building through Finite Element Analysis (FEM) programs and deficient members were identified based on demand-capacity as well as crack/damage checks were made analytically for the existing damage situation. At the end of the study, it has been observed in some of the columns that load bearing capacities were exceeded due to creep, axial compressive loads and corrosion effects and severe damages occurred. In addition, FEM results coincide with existing building damage. This paper will suggest appropriate measures to be taken for repair and retrofitting of the deficient members so that the building can be strengthened in the upcoming future.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Plastic hinge length requirements in reinforced concrete couple shear wall buildings for seismic reinforcement detailing.\n \n \n \n\n\n \n Hossain, S. A.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 127 - 130, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119331 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Plastic hinge length requirements in reinforced concrete couple shear wall buildings for seismic reinforcement detailing},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Hossain, Sk Amjad and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {127 - 130},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Proper reinforcement detailing in plastic hinge regions is one of the important measures that could help damage control of structural walls subjected to any severe earthquake event. Inelastic curvatures are commonly assumed to be uniform over a height called plastic hinge length. Non-linear dynamic analyses are performed on a set of coupled shear wall buildings of simple configurations for different heights. Inelastic curvatures are calculated on numerous heights of all the buildings and plotted along with the height of the buildings. Plastic hinge lengths are estimated with the yield curvatures from analytical results. It becomes a common practice to estimate the plastic hinge length equal to 0.5 to 1.0 times the wall length, which basically were developed from experimental studies on beam and column elements. As per the Canadian standards CSA A23.3-04, the requirements to calculate plastic hinge lengths are identical for both cantilever and coupled shear walls, i.e., 1.5 times the wall length in the direction under consideration. Results from the present study show that inelastic curvatures are not uniform over the plastic hinge length and the Canadian requirement to calculate plastic hinge length is unconservative for couple shear walls and more critical for slender coupled shear walls. A new multiplication factor is proposed for the safe estimation of plastic hinge length for couple shear walls of medium and high rise reinforced concrete buildings. Results indicate that it needs to consider 2.0 times wall length instead of 1.5 times wall length in the direction under consideration for the safe estimation of coupled shear wall plastic hinge length calculations.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Shear walls},\n%keywords = {Concrete buildings;Earthquakes;Intelligent buildings;Seismic design;Structural analysis;Tall buildings;},\n%note = {Couple shear wall;Coupled shear wall;Damage control;Inelastic curvature;Non-linear dynamic analysis;Plastic hinge region;Plastic hinges;Seismic reinforcements;Severe earthquakes;Structural walls;},\n} \n\n\n
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Proper reinforcement detailing in plastic hinge regions is one of the important measures that could help damage control of structural walls subjected to any severe earthquake event. Inelastic curvatures are commonly assumed to be uniform over a height called plastic hinge length. Non-linear dynamic analyses are performed on a set of coupled shear wall buildings of simple configurations for different heights. Inelastic curvatures are calculated on numerous heights of all the buildings and plotted along with the height of the buildings. Plastic hinge lengths are estimated with the yield curvatures from analytical results. It becomes a common practice to estimate the plastic hinge length equal to 0.5 to 1.0 times the wall length, which basically were developed from experimental studies on beam and column elements. As per the Canadian standards CSA A23.3-04, the requirements to calculate plastic hinge lengths are identical for both cantilever and coupled shear walls, i.e., 1.5 times the wall length in the direction under consideration. Results from the present study show that inelastic curvatures are not uniform over the plastic hinge length and the Canadian requirement to calculate plastic hinge length is unconservative for couple shear walls and more critical for slender coupled shear walls. A new multiplication factor is proposed for the safe estimation of plastic hinge length for couple shear walls of medium and high rise reinforced concrete buildings. Results indicate that it needs to consider 2.0 times wall length instead of 1.5 times wall length in the direction under consideration for the safe estimation of coupled shear wall plastic hinge length calculations.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Investigation of a Holistic Application of Fibre Optic Sensors in Structural Health Monitoring (SHM).\n \n \n \n\n\n \n Masoud, A.; Al-Sakkaf, A.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 323 - 326, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119234 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigation of a Holistic Application of Fibre Optic Sensors in Structural Health Monitoring (SHM)},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Masoud, Alhadi and Al-Sakkaf, Abobakr and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {323 - 326},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Optical fibers can be used as sensors to measure strain, temperature, pressure and other quantities and they can help to make informed decisions and collect data in 75% less time than traditional sensors. So, this paper indicated the definition of Structural Health Monitoring (SHM), Optical fibers advanced materials, What are optical fibers made of, advantages of fiber-Optics over copper cables, Types of Parameters to be measured, Main Challenges, Optical Fiber Sensor System Basic Components, Types of Fiber Optic Sensors, FO Sensor Applications, Fiber Optic Sensors for Civil Engineering and after this a brief introduction of the basic SHM concepts, the main fiber optic techniques available for this application are reviewed, emphasizing the four most successful ones. Then, two examples of the use of OFS in real structures are also addressed. As a result, this paper provided a tutorial introduction and comprehensive background on this subject such as how monitoring of Underground houses in Libya and the best method to monitor these types of buildings. Also, finding the most relevant current technical challenges because there are no components for the building. To sum up, this paper will figure out the convenient sensor type and the best installation method for these kinds of buildings. Finally, this paper also a forecast for the future of OFS for SHM. In addition, some of the challenges to be faced in the near future are addressed.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Optical fibers},\n%keywords = {Building components;Concretes;Fiber optic components;Foundations;Hydraulic structures;Intelligent buildings;Mortar;Optical cables;Pressure vessels;Structural health monitoring;Underground buildings;},\n%note = {Building engineering;Fiber Bragg;Fiber-optics;Fibre-optic sensor;Health monitoring;Informed decision;Optical-;Strain-temperature;Structural health;Structural health monitoring , building engineering;},\n} \n\n\n
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Optical fibers can be used as sensors to measure strain, temperature, pressure and other quantities and they can help to make informed decisions and collect data in 75% less time than traditional sensors. So, this paper indicated the definition of Structural Health Monitoring (SHM), Optical fibers advanced materials, What are optical fibers made of, advantages of fiber-Optics over copper cables, Types of Parameters to be measured, Main Challenges, Optical Fiber Sensor System Basic Components, Types of Fiber Optic Sensors, FO Sensor Applications, Fiber Optic Sensors for Civil Engineering and after this a brief introduction of the basic SHM concepts, the main fiber optic techniques available for this application are reviewed, emphasizing the four most successful ones. Then, two examples of the use of OFS in real structures are also addressed. As a result, this paper provided a tutorial introduction and comprehensive background on this subject such as how monitoring of Underground houses in Libya and the best method to monitor these types of buildings. Also, finding the most relevant current technical challenges because there are no components for the building. To sum up, this paper will figure out the convenient sensor type and the best installation method for these kinds of buildings. Finally, this paper also a forecast for the future of OFS for SHM. In addition, some of the challenges to be faced in the near future are addressed.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n An Integrated Approach for Pavement Networks Maintenance and Rehabilitation Planning.\n \n \n \n\n\n \n Mohammed, A.; Bagchi, A.; Nasiri, F.; and Zayed, T.\n\n\n \n\n\n\n In volume 2022-August, pages 286 - 289, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119224 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An Integrated Approach for Pavement Networks Maintenance and Rehabilitation Planning},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Mohammed, Ahmed and Bagchi, Ashutosh and Nasiri, Fuzhan and Zayed, Tarek},\nvolume = {2022-August},\nyear = {2022},\npages = {286 - 289},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The growing decline in roads condition has recently grasped the attention of numerous researchers and practitioners regarding road resiliency during its life-cycle. Roads in Canada are classified as in good condition, while in the US, roads are classified as grade D, which refers to poor condition [1][2]. Nevertheless, the situation will deteriorate significantly with the current inadequate investment levels. Hence, this paper demonstrates an integrated approach to planning pavement networks maintenance and rehabilitation through a developed resilience-based asset management model. The resilience-based asset management model is carried out through the development of five components; 1) a central database of asset inventory that includes numerous data that would serve as input for the proposed model, 2) a pavement condition and level of service (LOS) assessment models that encompass the different effect of climatic conditions on the pavement surface, and structural conditions, and LOS, 3) regression modeling of the effect of Freeze-Thaw on pavement and application of flooding effect on both pavement surface and structural conditions, 4) financial and temporal models recovery/intervention actions are formulated through computational models that account for the intervention costs and time and link them to the later used optimization model, and 5) an optimization model to formulate the mathematical problem for the proposed resilience assessment approach and integrate the formerly-mentioned components. This model was applied to the suburb of Pierrefonds-Roxboro pavement network in Montreal. The proposed model serves as an initial step toward providing more resilient municipal infrastructures. The model emphasizes that recovery plans should follow proactive measures to adapt to sudden or unforeseen events.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Asset management},\n%keywords = {Condition based maintenance;Highway administration;Investments;},\n%note = {Assets management;Classifieds;Condition;Integrated approach;Level of Service;Maintenance and rehabilitations;Management Model;Network maintenances;Optimisations;Resilience;},\n} \n\n\n
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The growing decline in roads condition has recently grasped the attention of numerous researchers and practitioners regarding road resiliency during its life-cycle. Roads in Canada are classified as in good condition, while in the US, roads are classified as grade D, which refers to poor condition [1][2]. Nevertheless, the situation will deteriorate significantly with the current inadequate investment levels. Hence, this paper demonstrates an integrated approach to planning pavement networks maintenance and rehabilitation through a developed resilience-based asset management model. The resilience-based asset management model is carried out through the development of five components; 1) a central database of asset inventory that includes numerous data that would serve as input for the proposed model, 2) a pavement condition and level of service (LOS) assessment models that encompass the different effect of climatic conditions on the pavement surface, and structural conditions, and LOS, 3) regression modeling of the effect of Freeze-Thaw on pavement and application of flooding effect on both pavement surface and structural conditions, 4) financial and temporal models recovery/intervention actions are formulated through computational models that account for the intervention costs and time and link them to the later used optimization model, and 5) an optimization model to formulate the mathematical problem for the proposed resilience assessment approach and integrate the formerly-mentioned components. This model was applied to the suburb of Pierrefonds-Roxboro pavement network in Montreal. The proposed model serves as an initial step toward providing more resilient municipal infrastructures. The model emphasizes that recovery plans should follow proactive measures to adapt to sudden or unforeseen events.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Stiffness Degradation of GFRP Reinforced Concrete Beam Under High-Cyclic Fatigue Loading.\n \n \n \n\n\n \n Nagy, I. E.; Asadian, A.; and Galal, K.\n\n\n \n\n\n\n In volume 2022-August, pages 399 - 401, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917118960 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Stiffness Degradation of GFRP Reinforced Concrete Beam Under High-Cyclic Fatigue Loading},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Nagy, Islam Elsayed and Asadian, Alireza and Galal, Khaled},\nvolume = {2022-August},\nyear = {2022},\npages = {399 - 401},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The corrosion-resistant characteristics of glass fibre-reinforced polymer (GFRP) reinforcing bars make them a suitable alternative for steel reinforcements in structural applications subjected to harsh environmental conditions, such as bridges and parking garages. Despite much research on the performance of GFRP reinforced concrete (RC) elements under static loading, there is a lack of experimental data on the fatigue performance of GFRP RC flexural elements. This paper discusses the stiffness degradation of a ribbed GFRP RC beam tested under high cyclic fatigue. Based on the results, the fatigue and the importance of structural health monitoring applied on bridges are described.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Structural health monitoring},\n%keywords = {Bridges;Concrete beams and girders;Corrosion fatigue;Corrosion resistance;Fiber reinforced concrete;Garages (parking);Glass fiber reinforced plastics;Pressure vessels;Steel corrosion;},\n%note = {Glass fiber-reinforced polymer reinforced concrete element;Glass-fiber reinforced polymer bars;Glassfiber reinforced polymers (GFRP);Health monitoring;High cyclic;Reinforced concrete beams;Reinforced concrete elements;Ribbed glass fiber-reinforced polymer bar;Stiffness degradation;Structural health;},\n} \n\n\n
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The corrosion-resistant characteristics of glass fibre-reinforced polymer (GFRP) reinforcing bars make them a suitable alternative for steel reinforcements in structural applications subjected to harsh environmental conditions, such as bridges and parking garages. Despite much research on the performance of GFRP reinforced concrete (RC) elements under static loading, there is a lack of experimental data on the fatigue performance of GFRP RC flexural elements. This paper discusses the stiffness degradation of a ribbed GFRP RC beam tested under high cyclic fatigue. Based on the results, the fatigue and the importance of structural health monitoring applied on bridges are described.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Assessment of steel plate shear walls in fire conditions.\n \n \n \n\n\n \n Norouzi, A.; Bagchi, A.; and Bhowmick, A.\n\n\n \n\n\n\n In volume 2022-August, pages 406 - 407, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917118962 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment of steel plate shear walls in fire conditions},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Norouzi, Anahita and Bagchi, Ashutosh and Bhowmick, Anjan},\nvolume = {2022-August},\nyear = {2022},\npages = {406 - 407},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">There is an increasing interest in using steel plate shear wall (SPSW) as a lateral resisting system in tall buildings in moderate-to-high seismic zones since it enables engineers to design cost-effective and lightweight structures. However, steel structures are susceptible to fire, and the ongoing construction of SPSWs demands an appropriate level of safety against structural damage and life loss in case of fire. Furthermore, tall structures should endure structure stability longer time in favor of permitting safe evacuation and minimizing the life risk. While there is extensive research about their performance against wind and earthquake, limited information is available regarding the performance of the SPSWs in case of fire and fire following earthquake hazards. The inadequate knowledge of structural engineering in the fire safety context of SPSWs provoked this study to fill this gap. In this regard, a sequential analysis is performed on five 3-story case studies. These SPSWs are first subjected to two fire scenarios using standard fire ISO 834 to attain valuable information about the fire behavior of SPSWs. For further studies, they are subjected to the different seismic damage levels followed by standard fire ISO 834. Finally, the failure mode and the collapse possibility of steel shear walls in case of the hazards mentioned earlier have been evaluated. It is founded that column stiffness has a decisive role in the fire-resistant rating of SPSWs and the thickness of the shear wall is of secondary importance. Meanwhile, it is concluded that there is a correlation between the fire resistance rating of SPSWs and the density of damages experienced.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Shear walls},\n%keywords = {Columns (structural);Earthquake effects;Electric towers;Fire hazards;Intelligent buildings;ISO Standards;Light weight structures;Plates (structural components);Pressure vessels;Seismic design;Steel structures;Tall buildings;Water towers;},\n%note = {Cost effective;Design costs;Finite element analyse;Fire condition;Performance;Post-earthquake fires;Seismic zones;Standard fire;Steel plate shear wall;Steel plates;},\n} \n\n\n
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There is an increasing interest in using steel plate shear wall (SPSW) as a lateral resisting system in tall buildings in moderate-to-high seismic zones since it enables engineers to design cost-effective and lightweight structures. However, steel structures are susceptible to fire, and the ongoing construction of SPSWs demands an appropriate level of safety against structural damage and life loss in case of fire. Furthermore, tall structures should endure structure stability longer time in favor of permitting safe evacuation and minimizing the life risk. While there is extensive research about their performance against wind and earthquake, limited information is available regarding the performance of the SPSWs in case of fire and fire following earthquake hazards. The inadequate knowledge of structural engineering in the fire safety context of SPSWs provoked this study to fill this gap. In this regard, a sequential analysis is performed on five 3-story case studies. These SPSWs are first subjected to two fire scenarios using standard fire ISO 834 to attain valuable information about the fire behavior of SPSWs. For further studies, they are subjected to the different seismic damage levels followed by standard fire ISO 834. Finally, the failure mode and the collapse possibility of steel shear walls in case of the hazards mentioned earlier have been evaluated. It is founded that column stiffness has a decisive role in the fire-resistant rating of SPSWs and the thickness of the shear wall is of secondary importance. Meanwhile, it is concluded that there is a correlation between the fire resistance rating of SPSWs and the density of damages experienced.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Displacement monitoring of an Instrumented Arch dam and related data Interpretation.\n \n \n \n\n\n \n Patra, B. K.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 331 - 334, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119236 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Displacement monitoring of an Instrumented Arch dam and related data Interpretation},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Patra, Bikram Kesharee and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {331 - 334},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Structural Health Monitoring (SHM) and prognosis serves numerous functions and remain vital components over the entire life cycle of a large dam or such other critical infrastructure. The instrumented health monitoring provides insight into the behaviour of a structure, assisting in numerical model calibration and complements to visual inspection. Further, the monitoring process aids in informed decision-making, planning for maintenance and rehabilitation schedules, to upkeep a structure effectively throughout its physical life while assuring the desired safety. A fundamental part of this process is the scientific selection of dependable, efficient instrumentation, strategically placed on the structure; similarly, data collecting, conditioning, processing, and interpretation are another key aspect of this process. Any instrumentation program's scope and attached objective vary with the type of structure, selected set of measurands, and measurement frequency. The instruments deployed in case of any large dam can be broadly categorized as hydro-metrological, geotechnical, geodetic, and seismic. This paper presents a case study of an arch dam which is currently undergoing slow irreversible upstream movement of the central dam crest. The study focuses on the following aspects (i) typical instrumentation used, (ii) collection of data for targeted measurands (stress, displacement, crack growth), (iii) data conditioning (missing data, erroneous entry) (iv) interpretation of the conditioned data (v) finally cross-validation of data interpretation with similar structures operating in a comparable environment. The study infers from the pendulum and crest collimation data that there is a slow irreversible deflection in progress.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Arch dams},\n%keywords = {Arches;Levees;Network security;Pendulums;Religious buildings;Structural health monitoring;},\n%note = {Alkali-aggregate reactions;Collimation;Data interpretation;Displacement monitoring;Health monitoring;Instrumentation;Large dams;Measurand;Structural health;Unusual behaviors;},\n} \n\n\n
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Structural Health Monitoring (SHM) and prognosis serves numerous functions and remain vital components over the entire life cycle of a large dam or such other critical infrastructure. The instrumented health monitoring provides insight into the behaviour of a structure, assisting in numerical model calibration and complements to visual inspection. Further, the monitoring process aids in informed decision-making, planning for maintenance and rehabilitation schedules, to upkeep a structure effectively throughout its physical life while assuring the desired safety. A fundamental part of this process is the scientific selection of dependable, efficient instrumentation, strategically placed on the structure; similarly, data collecting, conditioning, processing, and interpretation are another key aspect of this process. Any instrumentation program's scope and attached objective vary with the type of structure, selected set of measurands, and measurement frequency. The instruments deployed in case of any large dam can be broadly categorized as hydro-metrological, geotechnical, geodetic, and seismic. This paper presents a case study of an arch dam which is currently undergoing slow irreversible upstream movement of the central dam crest. The study focuses on the following aspects (i) typical instrumentation used, (ii) collection of data for targeted measurands (stress, displacement, crack growth), (iii) data conditioning (missing data, erroneous entry) (iv) interpretation of the conditioned data (v) finally cross-validation of data interpretation with similar structures operating in a comparable environment. The study infers from the pendulum and crest collimation data that there is a slow irreversible deflection in progress.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Enhanced Framework for Resilience-Based Design of Buildings.\n \n \n \n\n\n \n Pejmanfar, S.; and Tirca, L.\n\n\n \n\n\n\n In volume 2022-August, pages 294 - 295, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119226 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Enhanced Framework for Resilience-Based Design of Buildings},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Pejmanfar, Siamak and Tirca, Lucia},\nvolume = {2022-August},\nyear = {2022},\npages = {294 - 295},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Due to the critical role of buildings in delivering community resilience after a severe scenario rising from a natural disaster (e.g. wind, earthquake, etc.), this paper presents an enhanced resilience-based design framework based on the most probable and realistic repair cost and time estimation results employing the proper corresponding methodologies to either assess the current buildings or design new buildings. This framework enables the owners/shareholders to select and modify the preferred functionality level along with the safety protections of the occupants and their acceptable risk of economic loss. While the majority of current building codes refer mainly to public safety, criteria for acceptable risk of potential economic loss and recovery time should also be elaborated. The proposed framework estimates the economic loss in the aftermath of a natural disaster by employing the FEMA-P58 methodology. The F-Rec framework, which employs the FEMA P-58 performance assessment results to evaluate the recovery process, is also employed in order to estimate the building repair time as well as the mobilization time.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Risk assessment},\n%keywords = {Architectural design;Cost estimating;Intelligent buildings;Risk analysis;Risk perception;},\n%note = {'current;Community resiliences;Design frameworks;Design of buildings;Economic loss;Natural disasters;Recovery time;Repair costs;Repair time;Resilience;},\n} \n\n\n
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Due to the critical role of buildings in delivering community resilience after a severe scenario rising from a natural disaster (e.g. wind, earthquake, etc.), this paper presents an enhanced resilience-based design framework based on the most probable and realistic repair cost and time estimation results employing the proper corresponding methodologies to either assess the current buildings or design new buildings. This framework enables the owners/shareholders to select and modify the preferred functionality level along with the safety protections of the occupants and their acceptable risk of economic loss. While the majority of current building codes refer mainly to public safety, criteria for acceptable risk of potential economic loss and recovery time should also be elaborated. The proposed framework estimates the economic loss in the aftermath of a natural disaster by employing the FEMA-P58 methodology. The F-Rec framework, which employs the FEMA P-58 performance assessment results to evaluate the recovery process, is also employed in order to estimate the building repair time as well as the mobilization time.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Entropy evaluation of subsurface materials and defects in Concrete Slabs using GPR.\n \n \n \n\n\n \n Rahman, M. A.; Donda, D.; Latosh, F.; Tarussov, A.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 84 - 87, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119320 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Entropy evaluation of subsurface materials and defects in Concrete Slabs using GPR},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Rahman, Mohammed Abdul and Donda, Dipesh and Latosh, Fawzi and Tarussov, Alexander and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {84 - 87},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">In recent decades, the use of ground-penetrating radar (GPR) in non-destructive evaluation (NDE) of structures has increased significantly due to its ability to detect subsurface defects in a short duration. This paper investigates the signal attenuation of GPR signals using an image processing factor, entropy, and compares it with the widely adopted amplitude value in concrete slabs with subsurface materials including rebars, air gaps, and water gaps as simulated in a controlled laboratory setting. Three small plain concrete slabs with surface dimensions of 25 x 50 cm and depths of 5 cm, 10 cm, and 20 cm were cast for experimentation. The slabs were scanned using a hand-held GPR by placing one on top of the other in different combinations to investigate materials at depths of 5 cm, 10 cm and 15cm. The rebar sizes include 6 mm, 10 mm, 18 mm, and 20 mm and an FRP (Fiber-Reinforced Polymer) bar while air and water gaps were created between the slabs to simulate defects associated with horizontal cracks and delamination. The results indicate that GPR can identify and distinguish various subsurface materials and defects at differing depths using entropy as well. Additionally, entropy factor yielded consistent results for all the three investigated subsurface materials across all depths unlike those obtained using amplitude values.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Concrete slabs},\n%keywords = {Concrete placing;Fiber reinforced concrete;Fiber reinforced plastics;Geochemical surveys;Mortar;Rebar;Religious buildings;},\n%note = {Air-gaps;Defects in concrete;Ground Penetrating Radar;Non destructive evaluation;Non-destructive evaluation;Sub-surface materials;Subsurface defect;Subsurface detection;Water gaps;},\n} \n\n\n
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In recent decades, the use of ground-penetrating radar (GPR) in non-destructive evaluation (NDE) of structures has increased significantly due to its ability to detect subsurface defects in a short duration. This paper investigates the signal attenuation of GPR signals using an image processing factor, entropy, and compares it with the widely adopted amplitude value in concrete slabs with subsurface materials including rebars, air gaps, and water gaps as simulated in a controlled laboratory setting. Three small plain concrete slabs with surface dimensions of 25 x 50 cm and depths of 5 cm, 10 cm, and 20 cm were cast for experimentation. The slabs were scanned using a hand-held GPR by placing one on top of the other in different combinations to investigate materials at depths of 5 cm, 10 cm and 15cm. The rebar sizes include 6 mm, 10 mm, 18 mm, and 20 mm and an FRP (Fiber-Reinforced Polymer) bar while air and water gaps were created between the slabs to simulate defects associated with horizontal cracks and delamination. The results indicate that GPR can identify and distinguish various subsurface materials and defects at differing depths using entropy as well. Additionally, entropy factor yielded consistent results for all the three investigated subsurface materials across all depths unlike those obtained using amplitude values.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Monitoring FRP-RC beams under different weathering conditions and fatigue load.\n \n \n \n\n\n \n Rahmatian, A.; Nokken, M.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 429 - 432, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917118969 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Monitoring FRP-RC beams under different weathering conditions and fatigue load},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Rahmatian, Arash and Nokken, Michelle and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {429 - 432},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">This article presents a study on the structural behavior of FRP-RC beams and the instrumentation systems under fatigue and different weathering conditions. Twelve beams were designed, cast, and after 28 days, subjected to pre-cracking. This pre-cracking was designed to simulate the expected flexure cracks in service and to enhance the effects of subsequent exposure. The beams were then exposed to one of the following four conditions: control (indoor lab environment), immersion in alkaline solution, cyclic immersion in an alkali solution (Wet and Dry or W&D condition), and outdoor exposure (local Montreal climate). After 14 months, the beams were tested for their mechanical response in both static and dynamic conditions. The beams were instrumented with embedded fiber optic sensors in different configurations including direct bonding to rebars and bonding them to supplemental bars. Also, potentiometers were installed after pre-cracking at the mid-span for flexural crack and the shear span. Flexural toughness under different conditioning and ultimate load capacity and deflection are measured and the rate of degradation was estimated in each case.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Cracks},\n%keywords = {Bonding;Concrete beams and girders;Corrosion fatigue;Cyclic loads;Fracture mechanics;Hydraulic structures;Potentiometers (electric measuring instruments);Pressure vessels;Strain gages;Structural health monitoring;},\n%note = {Concrete beam;Concrete degradation;Corrosive environment;Corrosive environment for concrete;Cyclic loading;Electrical strain gages;Fibre-optic sensor;RC-fatigue;Serviceability;SHM;Weathering effect on concrete beam;Weathering effects;},\n} \n\n\n
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This article presents a study on the structural behavior of FRP-RC beams and the instrumentation systems under fatigue and different weathering conditions. Twelve beams were designed, cast, and after 28 days, subjected to pre-cracking. This pre-cracking was designed to simulate the expected flexure cracks in service and to enhance the effects of subsequent exposure. The beams were then exposed to one of the following four conditions: control (indoor lab environment), immersion in alkaline solution, cyclic immersion in an alkali solution (Wet and Dry or W&D condition), and outdoor exposure (local Montreal climate). After 14 months, the beams were tested for their mechanical response in both static and dynamic conditions. The beams were instrumented with embedded fiber optic sensors in different configurations including direct bonding to rebars and bonding them to supplemental bars. Also, potentiometers were installed after pre-cracking at the mid-span for flexural crack and the shear span. Flexural toughness under different conditioning and ultimate load capacity and deflection are measured and the rate of degradation was estimated in each case.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Modal Frequency Estimation from Hilbert Huang Transform.\n \n \n \n\n\n \n Roy, T. B.; Panigrahi, S. K.; Chourasia, A.; Tirca, L.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 54 - 55, Montreal, QC, Canada, 2022. \n \n\n\n\n
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@inproceedings{20243917119312 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modal Frequency Estimation from Hilbert Huang Transform},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Roy, Timir Baran and Panigrahi, Soraj Kumar and Chourasia, Ajay and Tirca, Lucia and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {54 - 55},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Estimation of modal frequency of a structure is essential to assess its health and performance. Traditional techniques to calculate modal frequencies from vibration-based structural response involve either frequency domain or time domain. In this work a time-frequency-amplitude domain decomposition technique is employed utilizing Hilbert Huang Transform (HHT). From Empirical Domain Decomposition (EMD) any structural response signal is decomposed into multiple Intrinsic Mode Functions (IMF) representing instantaneous frequency, instantaneous time and amplitude. These IMFs are then analyzed by decomposing into their singular values utilizing Singular Value Decomposition (SVD). Following that, Singular Hilbert Spectrum (SHS) values are plotted in using different color coding in time-frequency-amplitude domain and modal frequency values are obtained. A cantilever steel beam prototype is tested to estimate its modal frequencies. Ambient vibration response data is collected from the beam prototype using multiple accelerometers at different locations of the beam. Vibration response is then analyzed to get their SHS plot and estimate modal frequencies.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Hilbert-Huang transform},\n%keywords = {Frequency domain analysis;Frequency estimation;Intelligent buildings;Linear transformations;},\n%note = {Ambient vibrations;Domain decompositions;Empirical domain decomposition;Hilbert huang transform;Hilbert Huang transforms;Hilbert spectrum;Intrinsic Mode functions;Singular hilbert spectrum;Singular value decomposition;Singular values;Time frequency;Time-frequency-amplitude domain decomposition;Value decomposition;},\n} \n\n\n
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Estimation of modal frequency of a structure is essential to assess its health and performance. Traditional techniques to calculate modal frequencies from vibration-based structural response involve either frequency domain or time domain. In this work a time-frequency-amplitude domain decomposition technique is employed utilizing Hilbert Huang Transform (HHT). From Empirical Domain Decomposition (EMD) any structural response signal is decomposed into multiple Intrinsic Mode Functions (IMF) representing instantaneous frequency, instantaneous time and amplitude. These IMFs are then analyzed by decomposing into their singular values utilizing Singular Value Decomposition (SVD). Following that, Singular Hilbert Spectrum (SHS) values are plotted in using different color coding in time-frequency-amplitude domain and modal frequency values are obtained. A cantilever steel beam prototype is tested to estimate its modal frequencies. Ambient vibration response data is collected from the beam prototype using multiple accelerometers at different locations of the beam. Vibration response is then analyzed to get their SHS plot and estimate modal frequencies.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Local Defect Detection Using Non-Contact Sensing Devices for Structural Response Monitoring.\n \n \n \n\n\n \n Sajid, S.; and Chouinard, L.\n\n\n \n\n\n\n In volume 2022-August, pages 88 - 91, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119321 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Local Defect Detection Using Non-Contact Sensing Devices for Structural Response Monitoring},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Sajid, Sikandar and Chouinard, Luc},\nvolume = {2022-August},\nyear = {2022},\npages = {88 - 91},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Local defects in concrete elements, such as delamination, honeycomb and debonding, are traditionally detected with nondestructive test (NDT) that have some inherent limitations such as controlling the frequency range of the test, and the availability of a smooth surface for the impactor. This research investigates health monitoring techniques as an alternative approach for detecting and quantifying local defects using global response measurements in contrast to NDT that are based on spatial changes in local response measurements. A fully supported unrestrained reinforced concrete slab with built-in defects consisting of delaminations at two depths, a honeycomb, and a debonding, was used to perform experimental modal analysis. An automated instrumented hammer that provides a useful frequency range of up to 2 kHz, and a multimodal laser vibrometer were used to perform the measurements. The mode shapes obtained from experimental modal analysis exhibit higher responses at locations of defects and hence delineate debonding and both the shallow and deep delamination without requiring baseline information. Qualitative inferences indicate that the severity of defects can be classified as a function of the eigenvalues of mode shapes that are modified by the presence of a defect. The honeycomb was not detected without the baseline information and the given frequency range. Some guidance is provided on the practical application of the proposed global health monitoring for local defect detection with the highly efficient automated instrumentation. The detection using the experimental modal analysis needs to be further investigated since it potentially can provide a means to perform efficient quality control tests in the precast production of reinforced concrete elements.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Eigenvalues and eigenfunctions},\n%keywords = {Concrete slabs;Contact sensors;Debonding;Honeycomb structures;Hydraulic structures;Impulse response;Impulse testing;Outages;Pressure vessels;Structural health monitoring;},\n%note = {Defect detection;Experimental modal analysis;Frequency ranges;Health monitoring;Impulse-response test;Local defects;Non destructive testing;Non- contact sensors;Nondestructive tests;Structural health;},\n} \n\n\n
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Local defects in concrete elements, such as delamination, honeycomb and debonding, are traditionally detected with nondestructive test (NDT) that have some inherent limitations such as controlling the frequency range of the test, and the availability of a smooth surface for the impactor. This research investigates health monitoring techniques as an alternative approach for detecting and quantifying local defects using global response measurements in contrast to NDT that are based on spatial changes in local response measurements. A fully supported unrestrained reinforced concrete slab with built-in defects consisting of delaminations at two depths, a honeycomb, and a debonding, was used to perform experimental modal analysis. An automated instrumented hammer that provides a useful frequency range of up to 2 kHz, and a multimodal laser vibrometer were used to perform the measurements. The mode shapes obtained from experimental modal analysis exhibit higher responses at locations of defects and hence delineate debonding and both the shallow and deep delamination without requiring baseline information. Qualitative inferences indicate that the severity of defects can be classified as a function of the eigenvalues of mode shapes that are modified by the presence of a defect. The honeycomb was not detected without the baseline information and the given frequency range. Some guidance is provided on the practical application of the proposed global health monitoring for local defect detection with the highly efficient automated instrumentation. The detection using the experimental modal analysis needs to be further investigated since it potentially can provide a means to perform efficient quality control tests in the precast production of reinforced concrete elements.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Damage Localization of Concrete Gravity Dams based on Modal Strain Energy using Time Domain Spectral Finite Element Method.\n \n \n \n\n\n \n Sarkar, A.; Bagchi, S.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2022-August, pages 149 - 152, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119337 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Damage Localization of Concrete Gravity Dams based on Modal Strain Energy using Time Domain Spectral Finite Element Method},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Sarkar, Avirup and Bagchi, Saikat and Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {149 - 152},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Damage localization of concrete gravity dams is challenging due to the enormous size of the structure. The computational aspect is challenging as it requires huge computational time, space, and advanced computational tools. Moreover, the modal parameters like frequencies and curvature mode shapes, though effective in identifying the presence of damage, have been found not to be efficient in localizing the damage, especially for the large structural configuration. In this paper, Modal Strain Energy is used to efficiently identify the presence of damage as well as its location. The computational challenge is reduced by using an efficient time domain-based spectral finite element method. It is demonstrated that the analysis time required in the process by the time domain-based spectral finite element method is much less than the conventional finite element method.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Gravity dams},\n%keywords = {Time domain analysis;},\n%note = {Computational aspects;Computational time;Computational tools;Concrete gravity dams;Damage localization;Modal strain energy;Spectral finite element method;Time domain;Time-domain spectral finite element method;Time-space;},\n} \n\n\n
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Damage localization of concrete gravity dams is challenging due to the enormous size of the structure. The computational aspect is challenging as it requires huge computational time, space, and advanced computational tools. Moreover, the modal parameters like frequencies and curvature mode shapes, though effective in identifying the presence of damage, have been found not to be efficient in localizing the damage, especially for the large structural configuration. In this paper, Modal Strain Energy is used to efficiently identify the presence of damage as well as its location. The computational challenge is reduced by using an efficient time domain-based spectral finite element method. It is demonstrated that the analysis time required in the process by the time domain-based spectral finite element method is much less than the conventional finite element method.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n A review of available equations for predicting crack width of flexural GFRP reinforced concrete structures.\n \n \n \n\n\n \n Shabani, H.; Asadian, A.; and Galal, K.\n\n\n \n\n\n\n In volume 2022-August, pages 396 - 398, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917118959 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A review of available equations for predicting crack width of flexural GFRP reinforced concrete structures},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Shabani, Hamed and Asadian, Alireza and Galal, Khaled},\nvolume = {2022-August},\nyear = {2022},\npages = {396 - 398},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The prediction of crack width in glass fiber reinforced polymer (GFRP) reinforced concrete members is influenced by many factors, such as the spacing of the reinforcement, rebar tensile stress, concrete cover and bond dependent coefficient (k<inf>b</inf>), which depend on the surface type. This paper presented different crack width equations in code provisions. An experimental database of 60 beams selected from the literature and used for a statistical analysis on the bond dependent coefficient. The results presented in this paper indicate that the bond-dependent coefficient derived from the ACI 440.1R-15 crack width equation shows the highest standard deviation.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Structural health monitoring},\n%keywords = {Concrete buildings;Fiber reinforced concrete;Glass fiber reinforced plastics;Glass fibers;},\n%note = {Bond-dependent coefficient;Code provision;Concrete cover;Crack-width;Glass fiber reinforced polymer rebar;Glassfiber reinforced polymers (GFRP);Polymer rebars;Reinforced concrete member;Reinforced concrete structures;Serviceability;},\n} \n\n\n
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The prediction of crack width in glass fiber reinforced polymer (GFRP) reinforced concrete members is influenced by many factors, such as the spacing of the reinforcement, rebar tensile stress, concrete cover and bond dependent coefficient (kb), which depend on the surface type. This paper presented different crack width equations in code provisions. An experimental database of 60 beams selected from the literature and used for a statistical analysis on the bond dependent coefficient. The results presented in this paper indicate that the bond-dependent coefficient derived from the ACI 440.1R-15 crack width equation shows the highest standard deviation.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Vibration-based damage detection in UHPFC beams by using dynamic properties of the structure.\n \n \n \n\n\n \n Sokhangou, F.; Sorelli, L.; Chouinard, L.; Conciatori, D.; and Dey, P.\n\n\n \n\n\n\n In volume 2022-August, pages 104 - 107, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119325 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Vibration-based damage detection in UHPFC beams by using dynamic properties of the structure},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Sokhangou, Fahime and Sorelli, Luca and Chouinard, Luc and Conciatori, David and Dey, Pampa},\nvolume = {2022-August},\nyear = {2022},\npages = {104 - 107},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Monitoring the damage evolution of existing concrete structures is critical for efficiently planning infrastructure maintenance and for selecting the optimal time for repairing or strengthening. The approach for detecting and locating damage in concrete structures depends on the measured vibration response of the structure and the type of sensors used for measurements. This paper proposes a damage identification approach for Ultra-High-Performance Fiber Reinforced Concrete (UHPFRC) beams based on the estimated modal properties of the beam from vibration measurements. First, the effect of different levels of damage on the dynamic response of the beam is investigated numerically in the finite element software ABAQUS. Dynamic impact tests have been performed on several beams specimens with increasing levels of damage and vibration responses have been measured on several locations of the specimens through accelerometers. Automated operational modal analysis is applied to the data to obtain the modal frequencies and mode shapes, which are then analyzed to validate the proposed damage detection algorithms. The results indicate that the detection and localization of defects can be achieved in the presence of measurement noise. Further analyses need to be performed to determine the probability of detection as a function of the level of damage, damage location, and the number of defects.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {ABAQUS},\n%keywords = {Concrete beams and girders;Concrete buildings;Fiber reinforced concrete;High modulus textile fibers;Pressure vessels;Ultra-high performance concrete;},\n%note = {Concrete beam;Damage evolution;Dynamics properties;Health monitoring;Infrastructure maintenance;Inverse analysis;Optimal time;Structural health;Vibration response;Vibration-based damage detection;},\n} \n\n\n
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Monitoring the damage evolution of existing concrete structures is critical for efficiently planning infrastructure maintenance and for selecting the optimal time for repairing or strengthening. The approach for detecting and locating damage in concrete structures depends on the measured vibration response of the structure and the type of sensors used for measurements. This paper proposes a damage identification approach for Ultra-High-Performance Fiber Reinforced Concrete (UHPFRC) beams based on the estimated modal properties of the beam from vibration measurements. First, the effect of different levels of damage on the dynamic response of the beam is investigated numerically in the finite element software ABAQUS. Dynamic impact tests have been performed on several beams specimens with increasing levels of damage and vibration responses have been measured on several locations of the specimens through accelerometers. Automated operational modal analysis is applied to the data to obtain the modal frequencies and mode shapes, which are then analyzed to validate the proposed damage detection algorithms. The results indicate that the detection and localization of defects can be achieved in the presence of measurement noise. Further analyses need to be performed to determine the probability of detection as a function of the level of damage, damage location, and the number of defects.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Sustainable Infrastructure development with Integrated Photovoltaic-Thermal components for anti-icing applications for bridges.\n \n \n \n\n\n \n Valinejadshoubi, M.; Bagchi, A.; and Athienitis, A.\n\n\n \n\n\n\n In volume 2022-August, pages 489 - 492, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917118984 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Sustainable Infrastructure development with Integrated Photovoltaic-Thermal components for anti-icing applications for bridges},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Valinejadshoubi, Masoud and Bagchi, Ashutosh and Athienitis, Andreas},\nvolume = {2022-August},\nyear = {2022},\npages = {489 - 492},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">A modern city faces many challenges, such as maintaining bridges in harsh climates for snow removal and the power supply required for bridges. For anti-icing, deicing, and anti-compaction of snow on the bridges, the applications of salt and sand or other gritty material have been used, which can damage bridge structure. Infrastructure Integrated Photovoltaic-Thermal (IIPV/T) can be installed on bridges as a power source for Hydronic Heating Pavement (HHP) in anti-icing applications. This paper presents a new IIPV/T system to generate energy in anti-icing application for Champlain Bridge in Montreal and investigates how much energy this proposed system can supply. The results show that the proposed IIPV/T system can supply 63 percent of the anti-icing energy demand for Champlain Bridge in winter. The system size of the proposed IIPV/T is 14,300 kW. The system installation cost is around 23 million CAD. The basis on the energy generation of the proposed IIPV/T system, the payback period is around 1.5 years. As a result, a complete potential IIPV/T system is presented to achieve the maximum energy generation for HHP that can be the basis for future investment in smart zero-energy cities.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Snow},\n%keywords = {Boilers;Bridge components;Structural dynamics;},\n%note = {Anti-icing;Champlain;Energy;Energy generations;Hydronic heating pavement;Hydronic-heating;Infrastructure integrated photovoltaic-thermal;Photovoltaic thermals;Photovoltaic/thermal systems;Sustainable infrastructure;},\n} \n\n\n
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A modern city faces many challenges, such as maintaining bridges in harsh climates for snow removal and the power supply required for bridges. For anti-icing, deicing, and anti-compaction of snow on the bridges, the applications of salt and sand or other gritty material have been used, which can damage bridge structure. Infrastructure Integrated Photovoltaic-Thermal (IIPV/T) can be installed on bridges as a power source for Hydronic Heating Pavement (HHP) in anti-icing applications. This paper presents a new IIPV/T system to generate energy in anti-icing application for Champlain Bridge in Montreal and investigates how much energy this proposed system can supply. The results show that the proposed IIPV/T system can supply 63 percent of the anti-icing energy demand for Champlain Bridge in winter. The system size of the proposed IIPV/T is 14,300 kW. The system installation cost is around 23 million CAD. The basis on the energy generation of the proposed IIPV/T system, the payback period is around 1.5 years. As a result, a complete potential IIPV/T system is presented to achieve the maximum energy generation for HHP that can be the basis for future investment in smart zero-energy cities.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Development of an Automated Damage Detection System for Modular Buildings.\n \n \n \n\n\n \n Valinejadshoubi, M.; Bagchi, A.; and Moselhi, O.\n\n\n \n\n\n\n In volume 2022-August, pages 56 - 59, Montreal, QC, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20243917119313 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Development of an Automated Damage Detection System for Modular Buildings},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Valinejadshoubi, Mojtaba and Bagchi, Ashutosh and Moselhi, Osama},\nvolume = {2022-August},\nyear = {2022},\npages = {56 - 59},\nissn = {25643738},\naddress = {Montreal, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Transportation is a very significant part of the process for construction of buildings with prefabricated modules. The purpose of our research is to develop a novel data-driven structural health monitoring (SHM) system to assess the structural condition of individual prefabricated building modules during transportation. The developed system consists of a sensor-based data acquisition (DAQ) module and a storage module, along with automated data analysis module. The system was applied to a wooden prefabricated building module. We attached 8 vibration sensors to the walls and floors of that building module when it left the factory and monitored its structural condition during its transportation to the site. After detailed analysis, using performance measurement techniques: confusion matrix and accuracy score, we found that the DBSCAN algorithm yielded the full accuracy score in the case of more than one level of damage compared with k-means, mean shift, and agglomerative clustering with accuracy scores of 0.81, 0.79, and 0.78 respectively. The system can allow for timely replacement of damaged parts of the prefabricated modules before installation and provide evidence to support manufacturers insurance claims on repair and modification costs.<br/></div> © 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Structural health monitoring},\n%keywords = {Building components;Building moving;Hydraulic structures;Intelligent buildings;},\n%note = {Clustering technique, damage sensitive feature;Clustering techniques;Damage detection systems;Damage-sensitive features;Health monitoring;Modulars;Monitoring system;Structural condition;Structural health;Transportation phase;},\n} \n\n\n
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Transportation is a very significant part of the process for construction of buildings with prefabricated modules. The purpose of our research is to develop a novel data-driven structural health monitoring (SHM) system to assess the structural condition of individual prefabricated building modules during transportation. The developed system consists of a sensor-based data acquisition (DAQ) module and a storage module, along with automated data analysis module. The system was applied to a wooden prefabricated building module. We attached 8 vibration sensors to the walls and floors of that building module when it left the factory and monitored its structural condition during its transportation to the site. After detailed analysis, using performance measurement techniques: confusion matrix and accuracy score, we found that the DBSCAN algorithm yielded the full accuracy score in the case of more than one level of damage compared with k-means, mean shift, and agglomerative clustering with accuracy scores of 0.81, 0.79, and 0.78 respectively. The system can allow for timely replacement of damaged parts of the prefabricated modules before installation and provide evidence to support manufacturers insurance claims on repair and modification costs.
© 2022 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n Forward.\n \n \n \n\n\n \n Bagchi, A.\n\n\n \n\n\n\n International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII, 2022-August: Accolade Measurement; GlobVision Inc; RocTest Ltd.; Sensequake - . 2022.\n \n\n\n\n
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@article{20243917119298 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Forward},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Bagchi, Ashutosh},\nvolume = {2022-August},\nyear = {2022},\npages = {Accolade Measurement; GlobVision Inc; RocTest Ltd.; Sensequake - },\nissn = {25643738},\naddress = {Montreal, QC, Canada},\n} \n\n\n
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\n \n\n \n \n \n \n \n \n Towards sustainable forestry: Using a spatial Bayesian belief network to quantify trade-offs among forest-related ecosystem services.\n \n \n \n \n\n\n \n Frizzle, C.; Fournier, R. A.; Trudel, M.; and Luther, J. E.\n\n\n \n\n\n\n Journal of Environmental Management, 301. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"TowardsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20233314525566 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Towards sustainable forestry: Using a spatial Bayesian belief network to quantify trade-offs among forest-related ecosystem services},\njournal = {Journal of Environmental Management},\nauthor = {Frizzle, Catherine and Fournier, Richard A. and Trudel, Melanie and Luther, Joan E.},\nvolume = {301},\nyear = {2022},\nissn = {03014797},\nabstract = {<div data-language="eng" data-ev-field="abstract">Assessing trade-offs among ecosystem services (ESs) that are provided by forests is necessary to support decision-making and to minimize negative effects of timber harvesting. In this study, we examined how spatial data, forest operational rules, ESs, and probabilistic statistics can be combined into a practical tool for trade-off analysis that could guide decision-making towards sustainable forestry. Our main goal was to analyze trade-offs among the wood provisioning ES and other forest ESs at the landscape level using a Bayesian belief network (BBN). We used LiDAR data to derive four ES layers as inputs to a spatial BBN: (i) wood provisioning; (ii) erosion regulating; (iii) climate regulating; and (iv) habitat supporting. We quantified operational constraints with four forest operational rules (FOR) that were defined in terms of: (i) potential harvest block size; (ii) distance between a small potential harvest block and a larger harvest block; (iii) gross merchantable volume (GMV); and (iv) distance to an existing resource road. Maps of the most probable trade-off classes between the wood provisioning ES and other ESs enabled us to identify areas where timber harvesting should be avoided or where timber harvesting should have a very low negative effect on other ESs. Even with our most restrictive management scenario, the total GMV that could be harvested met the annual allowable cut (AAC) volume required to meet sustainable forestry objectives. Through our study, we demonstrated that high-resolution spatial data could be used to quantify trade-offs among wood provisioning ES and other forest-related ESs and to simulate small changes in ES indicators within the BBN. We also demonstrated the potential to evaluate management scenarios to reduce trade-offs by considering FOR as inputs to the BBN. Maps of the most probable trade-off classes among two or three ESs under operational constraints provide key information to guide forest management decision-making towards sustainable forestry.<br/></div> © 2021},\nkey = {Bayesian networks},\n%keywords = {Decision making;Economic and social effects;Ecosystems;Harvesting;Logging (forestry);Optical radar;Timber;},\n%note = {Decisions makings;Ecosystem services;LiDAR;Management scenarios;Operational constraints;Probabilistics;Spatial data;Sustainable forestry;Timber harvesting;Trade off;},\nURL = {http://dx.doi.org/10.1016/j.jenvman.2021.113817},\n} \n\n\n
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Assessing trade-offs among ecosystem services (ESs) that are provided by forests is necessary to support decision-making and to minimize negative effects of timber harvesting. In this study, we examined how spatial data, forest operational rules, ESs, and probabilistic statistics can be combined into a practical tool for trade-off analysis that could guide decision-making towards sustainable forestry. Our main goal was to analyze trade-offs among the wood provisioning ES and other forest ESs at the landscape level using a Bayesian belief network (BBN). We used LiDAR data to derive four ES layers as inputs to a spatial BBN: (i) wood provisioning; (ii) erosion regulating; (iii) climate regulating; and (iv) habitat supporting. We quantified operational constraints with four forest operational rules (FOR) that were defined in terms of: (i) potential harvest block size; (ii) distance between a small potential harvest block and a larger harvest block; (iii) gross merchantable volume (GMV); and (iv) distance to an existing resource road. Maps of the most probable trade-off classes between the wood provisioning ES and other ESs enabled us to identify areas where timber harvesting should be avoided or where timber harvesting should have a very low negative effect on other ESs. Even with our most restrictive management scenario, the total GMV that could be harvested met the annual allowable cut (AAC) volume required to meet sustainable forestry objectives. Through our study, we demonstrated that high-resolution spatial data could be used to quantify trade-offs among wood provisioning ES and other forest-related ESs and to simulate small changes in ES indicators within the BBN. We also demonstrated the potential to evaluate management scenarios to reduce trade-offs by considering FOR as inputs to the BBN. Maps of the most probable trade-off classes among two or three ESs under operational constraints provide key information to guide forest management decision-making towards sustainable forestry.
© 2021\n
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\n \n\n \n \n \n \n \n Double Skin Façade Integrating SemiTransparent Photovoltaics: an Analysis for Different Climates.\n \n \n \n\n\n \n Ioannidis, Z.; Athienitis, A. K.; Stathopoulos, T.; and Rounis, S.\n\n\n \n\n\n\n In volume 128, pages 440 - 448, Hybrid, Toronto, ON, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20233714703901 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Double Skin Façade Integrating SemiTransparent Photovoltaics: an Analysis for Different Climates},\njournal = {ASHRAE Transactions},\nauthor = {Ioannidis, Zisis and Athienitis, Andreas K. and Stathopoulos, Ted and Rounis, Stratos},\nvolume = {128},\nyear = {2022},\npages = {440 - 448},\nissn = {00012505},\naddress = {Hybrid, Toronto, ON, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">In this paper the energy potential of a Double Skin Façade integrating Semi-Transparent Photovoltaics (DSF-STPV) is investigated for DSF-STPV configurations for different climatic regions. The Double Skin Façade (DSF) consists of Semi-Transparent Photovoltaics (STPV) as the exterior layer and an Insulating glazing unit as the interior layer of the DSF-STPV. Semi-Transparent Photovoltaics (STPV) can be integrated on Double Skin Facades (DSF) to enhance the electrical and thermal performance of a building. A mechanically or naturally ventilated DSF, can enhance the natural/cross ventilation of building, can extract heat from the DSF and increase the Coefficient of Performance (COP) of an air source heat pump based mechanical system, or it can introduce fresh air directly to the building. In addition, the integrated STPV, can control the solar gains and the levels of the daylight into the zone. A mathematical model was developed tο simulate the performance of the system, to predict the temperature distribution and airflow within the DSF and the active and passive effects the DSF-STPV has on the energy consumption of the adjacent perimeter zones. The simulation model is based on a finite difference thermal network and can be utilized to perform parametric analyses. A parametric analysis is carried out to determine the values of critical design and operating parameters that minimize the overall energy consumptions, while guaranteeing satisfactory thermal comfort for the occupants,. Specifically, a comprehensive case study for a three-story office building located in four different climate zones is performed. These four climate zones are simulated for nine different DSF-STPV cavity widths, five different velocity set-points and 10 different operating strategies. The numerical results show that, depending on the climate of the region and the depth of the cavity, different strategies should be implemented. By suitably optimizing the DSF-STPV design and operation, the energy demand of the adjacent perimeter zones can be covered by the generated PV electricity, facilitating to reach the goal of net zero energy building.<br/></div> © 2022 ASHRAE.},\nkey = {Energy utilization},\n%keywords = {Facades;Office buildings;Zero energy buildings;},\n%note = {Climatic regions;Double-skin facades;Electrical performance;Energy-consumption;Energy-potentials;Insulating glazing units;Interior layer;Parametric analysis;Photovoltaic configuration;Semi-transparent photovoltaic;},\n} \n\n\n
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In this paper the energy potential of a Double Skin Façade integrating Semi-Transparent Photovoltaics (DSF-STPV) is investigated for DSF-STPV configurations for different climatic regions. The Double Skin Façade (DSF) consists of Semi-Transparent Photovoltaics (STPV) as the exterior layer and an Insulating glazing unit as the interior layer of the DSF-STPV. Semi-Transparent Photovoltaics (STPV) can be integrated on Double Skin Facades (DSF) to enhance the electrical and thermal performance of a building. A mechanically or naturally ventilated DSF, can enhance the natural/cross ventilation of building, can extract heat from the DSF and increase the Coefficient of Performance (COP) of an air source heat pump based mechanical system, or it can introduce fresh air directly to the building. In addition, the integrated STPV, can control the solar gains and the levels of the daylight into the zone. A mathematical model was developed tο simulate the performance of the system, to predict the temperature distribution and airflow within the DSF and the active and passive effects the DSF-STPV has on the energy consumption of the adjacent perimeter zones. The simulation model is based on a finite difference thermal network and can be utilized to perform parametric analyses. A parametric analysis is carried out to determine the values of critical design and operating parameters that minimize the overall energy consumptions, while guaranteeing satisfactory thermal comfort for the occupants,. Specifically, a comprehensive case study for a three-story office building located in four different climate zones is performed. These four climate zones are simulated for nine different DSF-STPV cavity widths, five different velocity set-points and 10 different operating strategies. The numerical results show that, depending on the climate of the region and the depth of the cavity, different strategies should be implemented. By suitably optimizing the DSF-STPV design and operation, the energy demand of the adjacent perimeter zones can be covered by the generated PV electricity, facilitating to reach the goal of net zero energy building.
© 2022 ASHRAE.\n
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\n \n\n \n \n \n \n \n \n Design Approach towards Photovoltaic Thermal Solar Air Heater (PVT-SAH) assisted Solid Desiccant Cooling (SDC) System for Daytime Operation.\n \n \n \n \n\n\n \n Nibandhe, A.; Bonyadi, N.; Lee, B.; and Bagchi, A.\n\n\n \n\n\n\n In pages 3332 - 3339, Bruges, Belgium, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"DesignPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20231413860121 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design Approach towards Photovoltaic Thermal Solar Air Heater (PVT-SAH) assisted Solid Desiccant Cooling (SDC) System for Daytime Operation},\njournal = {Building Simulation Conference Proceedings},\nauthor = {Nibandhe, Aditya and Bonyadi, Nima and Lee, Bruno and Bagchi, Ashutosh},\nyear = {2022},\npages = {3332 - 3339},\nissn = {25222708},\naddress = {Bruges, Belgium},\nabstract = {<div data-language="eng" data-ev-field="abstract">In typical solar-assisted Solid Desiccant Cooling (SDC) systems, the processed air exhausted after the Sensible Wheel (SW) corresponds to wasted useful energy. By using the exhausted air from SW as input to the solar collector, further improvements in the system's thermal Coefficient of Performance (COPth) and unmet hours can be achieved. This research aims to improve the performance of an integrated Photovoltaic Thermal Solar Air Heater (PVT-SAH) assisted SDC system to cool a retail store of a low-rise mixed-use building in a hot and humid climate for daytime operation. For this purpose, a couple of improvements to an existing configuration are proposed, and three different configurations have been analyzed and compared. The annual average COPth for configurations 1, 2, and 3 comes around 0.95, 1.90, and 2.23, respectively. It is observed that configuration 3 offers 135% and 18% improvement in COPth over configurations 1 and 2. Configuration 3 achieved 12% unmet hours (48% and 33% lower than configurations 1 and 2, respectively).<br/></div> © International Building Performance Simulation Association, 2022},\nkey = {Cooling systems},\n%keywords = {Heating equipment;Passive solar;Retail stores;Solar heating;Solar power generation;},\n%note = {Daytime operations;Desiccant cooling systems;Design approaches;Energy;Photovoltaic thermals;Solar air heater;Solar assisted;Solid desiccants;Thermal coefficients;Thermal solar;},\nURL = {http://dx.doi.org/10.26868/25222708.2021.31013},\n} \n\n\n
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In typical solar-assisted Solid Desiccant Cooling (SDC) systems, the processed air exhausted after the Sensible Wheel (SW) corresponds to wasted useful energy. By using the exhausted air from SW as input to the solar collector, further improvements in the system's thermal Coefficient of Performance (COPth) and unmet hours can be achieved. This research aims to improve the performance of an integrated Photovoltaic Thermal Solar Air Heater (PVT-SAH) assisted SDC system to cool a retail store of a low-rise mixed-use building in a hot and humid climate for daytime operation. For this purpose, a couple of improvements to an existing configuration are proposed, and three different configurations have been analyzed and compared. The annual average COPth for configurations 1, 2, and 3 comes around 0.95, 1.90, and 2.23, respectively. It is observed that configuration 3 offers 135% and 18% improvement in COPth over configurations 1 and 2. Configuration 3 achieved 12% unmet hours (48% and 33% lower than configurations 1 and 2, respectively).
© International Building Performance Simulation Association, 2022\n
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\n \n\n \n \n \n \n \n \n EXPLORATORY DATA ANALYSES ON CFRP WRAPPED HDD OVERBEND SUBJECTED TO COMBINED LOADING.\n \n \n \n \n\n\n \n Davaripour, F.; Roy, K.; and Maghoul, P.\n\n\n \n\n\n\n In volume 1, pages Pipline Division - , Calgary, AB, Canada, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"EXPLORATORYPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20230313407428 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {EXPLORATORY DATA ANALYSES ON CFRP WRAPPED HDD OVERBEND SUBJECTED TO COMBINED LOADING},\njournal = {Proceedings of the Biennial International Pipeline Conference, IPC},\nauthor = {Davaripour, Farhad and Roy, Kshama and Maghoul, Pooneh},\nvolume = {1},\nyear = {2022},\npages = {Pipline Division - },\naddress = {Calgary, AB, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Horizontal directional drilling (HDD) is one of the popular pipeline trenchless construction techniques for sites where surface excavations and conventional trenching are not desirable. An integral part of the pipeline design and construction process is to perform stress analysis on the HDD overbends, which can be subjected to significant cross-sectional deformations due to stresses/strains imposed by thermal expansion and internal pressure. This paper proposes a novel approach to reduce the stress range in the HDD overbends using carbon fibre reinforced polymer (CFRP) wraps. Although this reinforcement technique is primarily used in the pipeline industry for repairing damaged pipes, there is a handful of recent studies that showed the promising effect of using CFRP reinforcement on undamaged pipe bends. A total of 259 finite element analyses are conducted with a different combination of pipe diameter to thickness ratio, CFRP length and thickness, fibre orientation, and internal pressure. An exploratory data analysis is then performed to demonstrate the impact of each variable on the maximum equivalent stresses imposed on the HDD overbend. The finite element results show that multi-directional fibre orientation leads to the highest reduction of peak equivalent stress on the HDD overbend. Besides, an increase in CFRP thickness results in a greater reduction of stresses on the HDD overbend. However, CFRP length does not have a noticeable effect on decreasing the stresses on the HDD overbend.<br/></div> Copyright © 2022 by ASME.},\nkey = {Trenching},\n%keywords = {Carbon fibers;Finite element method;Pipelines;Reinforcement;Stress analysis;Thermal expansion;},\n%note = {% reductions;Carbon fibre reinforced polymer;Combined loading;Equivalent stress;Exploratory data analysis;Fibre orientation;Horizontal directional drilling;Internal pressures;Polymer length;Polymer thickness;},\nURL = {http://dx.doi.org/10.1115/IPC2022-87299},\n} \n\n\n
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Horizontal directional drilling (HDD) is one of the popular pipeline trenchless construction techniques for sites where surface excavations and conventional trenching are not desirable. An integral part of the pipeline design and construction process is to perform stress analysis on the HDD overbends, which can be subjected to significant cross-sectional deformations due to stresses/strains imposed by thermal expansion and internal pressure. This paper proposes a novel approach to reduce the stress range in the HDD overbends using carbon fibre reinforced polymer (CFRP) wraps. Although this reinforcement technique is primarily used in the pipeline industry for repairing damaged pipes, there is a handful of recent studies that showed the promising effect of using CFRP reinforcement on undamaged pipe bends. A total of 259 finite element analyses are conducted with a different combination of pipe diameter to thickness ratio, CFRP length and thickness, fibre orientation, and internal pressure. An exploratory data analysis is then performed to demonstrate the impact of each variable on the maximum equivalent stresses imposed on the HDD overbend. The finite element results show that multi-directional fibre orientation leads to the highest reduction of peak equivalent stress on the HDD overbend. Besides, an increase in CFRP thickness results in a greater reduction of stresses on the HDD overbend. However, CFRP length does not have a noticeable effect on decreasing the stresses on the HDD overbend.
Copyright © 2022 by ASME.\n
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\n \n\n \n \n \n \n \n \n Radar altimetry for classifying surface conditions of subarctic lakes during freezing and thawing periods.\n \n \n \n \n\n\n \n Ziyad, J.; Goita, K.; and Magagi, R.\n\n\n \n\n\n\n International Journal of Remote Sensing, 43(18): 6689 - 6720. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"RadarPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224713155706 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Radar altimetry for classifying surface conditions of subarctic lakes during freezing and thawing periods},\njournal = {International Journal of Remote Sensing},\nauthor = {Ziyad, Jawad and Goita, Kalifa and Magagi, Ramata},\nvolume = {43},\nnumber = {18},\nyear = {2022},\npages = {6689 - 6720},\nissn = {01431161},\nabstract = {<div data-language="eng" data-ev-field="abstract">Ice cover on subarctic lakes is an important indicator of climate change at local- or regional scales. This study proposes a new approach for classifying altimetry data from Jason-2 and SARAL/Altika satellite missions to characterize surface states of subarctic lakes. It focuses on Great Slave Lake (Canada) during freeze-up and thaw periods. For the first time, parameters from altimetry waveforms were used in an unsupervised clustering to establish distinct clusters from waveforms observed from Jason-2 and SARAL/Altika during the freeze-up and the thaw period. Clusters are assigned to the different surface states (open water, pure ice and leads) based on a priori altimetry and radiometric information. The statistics of these clusters were then used to construct two trained models of supervised classification based upon KNN (K-nearest neighbour) and SVM (support vector machine). The SVM-based model yielded the best results (accuracy of 92% with Jason-2, and 98% with SARAL/Altika). It was used to classify all waveforms considered in the study from the nominal orbits of Jason-2 (2008–2016) and SARAL/Altika (2013–2016). Results were superimposed onto Moderate Resolution Imaging Spectroradiometer (MODIS) products for qualitative visual and semi-quantitative assessments.<br/></div> © 2022 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Lakes},\n%keywords = {Climate change;Ice;Nearest neighbor search;Orbits;Satellite imagery;Support vector machines;Surface states;Thawing;},\n%note = {Clusterings;Continental waters;Freeze-up;Ice cover;Radar altimetry;Satellite altimetry;Subarctic continental water;Supervised classification;Support vectors machine;Waveforms;},\nURL = {http://dx.doi.org/10.1080/01431161.2022.2143733},\n} \n\n\n
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Ice cover on subarctic lakes is an important indicator of climate change at local- or regional scales. This study proposes a new approach for classifying altimetry data from Jason-2 and SARAL/Altika satellite missions to characterize surface states of subarctic lakes. It focuses on Great Slave Lake (Canada) during freeze-up and thaw periods. For the first time, parameters from altimetry waveforms were used in an unsupervised clustering to establish distinct clusters from waveforms observed from Jason-2 and SARAL/Altika during the freeze-up and the thaw period. Clusters are assigned to the different surface states (open water, pure ice and leads) based on a priori altimetry and radiometric information. The statistics of these clusters were then used to construct two trained models of supervised classification based upon KNN (K-nearest neighbour) and SVM (support vector machine). The SVM-based model yielded the best results (accuracy of 92% with Jason-2, and 98% with SARAL/Altika). It was used to classify all waveforms considered in the study from the nominal orbits of Jason-2 (2008–2016) and SARAL/Altika (2013–2016). Results were superimposed onto Moderate Resolution Imaging Spectroradiometer (MODIS) products for qualitative visual and semi-quantitative assessments.
© 2022 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n Porous stones in permeability measurement: drawbacks and solution.\n \n \n \n \n\n\n \n Bayoumi, A.; Mhenni, A.; Chekired, M.; and Karray, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 59(11): 2002 - 2007. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"PorousPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20224413043971 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Porous stones in permeability measurement: drawbacks and solution},\njournal = {Canadian Geotechnical Journal},\nauthor = {Bayoumi, Aya and Mhenni, Ahmed and Chekired, Mohamed and Karray, Mourad},\nvolume = {59},\nnumber = {11},\nyear = {2022},\npages = {2002 - 2007},\nissn = {00083674},\nabstract = {<div data-language="eng" data-ev-field="abstract">Porous stones are commonly used in geotechnical laboratory testing to provide solid support at the two ends of the tested specimen. Although porous stones can have several advantages, they can induce a hydraulic impedance that might alter the flowrate results. Numerous suggestions and recommendations were issued to avoid some of the problems encountered when using porous stones, such as clogging and stones’ low permeability coefficient (K<inf>p</inf>). However, it is proven in this technical %note that the existence of a soil–porous stones interaction prevents the elimination of porous stones’ influence, leading to unreliable permeability results. A practical solution based on manufacturing unique porous stones (MS) is suggested in an attempt to eliminate such an influence. The porous stones’ influence is highlighted by running excess pore pressure dissipation tests under triaxial conditions with calibrated beads. The results show a soil–porous stones interaction and a flowrate increase up to 700% due to MS. This interaction is addressed through permeability measurements of three soil types in a flexible-wall permeameter using standard porous stones (SS) and the newly manufactured stones (MS). At least one order of magnitude of difference in the soil permeability measurement and a decrease in the dissipation test time are observed with MS. This technical %note also validates the limitation of the superposition approach for correcting the soil’s permeability (K<inf>soil</inf>). It is shown that porous stones can induce a signature directly related to the soil type and applied pressure.<br/></div> © 2022 The Author(s).},\nURL = {http://dx.doi.org/10.1139/cgj-2021-0400},\n} \n\n\n
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Porous stones are commonly used in geotechnical laboratory testing to provide solid support at the two ends of the tested specimen. Although porous stones can have several advantages, they can induce a hydraulic impedance that might alter the flowrate results. Numerous suggestions and recommendations were issued to avoid some of the problems encountered when using porous stones, such as clogging and stones’ low permeability coefficient (Kp). However, it is proven in this technical %note that the existence of a soil–porous stones interaction prevents the elimination of porous stones’ influence, leading to unreliable permeability results. A practical solution based on manufacturing unique porous stones (MS) is suggested in an attempt to eliminate such an influence. The porous stones’ influence is highlighted by running excess pore pressure dissipation tests under triaxial conditions with calibrated beads. The results show a soil–porous stones interaction and a flowrate increase up to 700% due to MS. This interaction is addressed through permeability measurements of three soil types in a flexible-wall permeameter using standard porous stones (SS) and the newly manufactured stones (MS). At least one order of magnitude of difference in the soil permeability measurement and a decrease in the dissipation test time are observed with MS. This technical %note also validates the limitation of the superposition approach for correcting the soil’s permeability (Ksoil). It is shown that porous stones can induce a signature directly related to the soil type and applied pressure.
© 2022 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Experimental Study on the Effect of Gusset Plates' Geometry on the Behavior of Steel Lattice Transmission Line Tower Connections.\n \n \n \n \n\n\n \n Ahmat, A. M. A.; Langlois, S.; Labossiere, P.; and Saoud, K. S.\n\n\n \n\n\n\n In pages 337 - 347, Orlando, FL, United states, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20224112890347 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental Study on the Effect of Gusset Plates' Geometry on the Behavior of Steel Lattice Transmission Line Tower Connections},\njournal = {Electrical Transmission and Substation Structures 2022: Innovating for Critical Global Infrastructure - Proceedings of the Electrical Transmission and Substation Structures Conference 2022},\nauthor = {Ahmat, Adam Mahamat Ali and Langlois, Sebastien and Labossiere, Pierre and Saoud, Kahina Sad},\nyear = {2022},\npages = {337 - 347},\naddress = {Orlando, FL, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Steel lattice towers are commonly used in overhead power lines. Key elements of these towers are gusset plates, which connect and transmit forces between members. This paper presents an evaluation of the behavior and strength of lattice towers' gusset plates (LTGP) based on experimental investigation. The study presented herein was carried out at the Université de Sherbrooke and deals with a set of geometrically distinct conventional configurations subjected to monotonic tensile loading until failure. Digital image correlation (DIC) method was employed as a means of elucidating the mechanisms governing the behavior of bolted assemblies with gusset plates. The study revealed the influence of geometry in the behavior of bolted connections, a parameter which is generally not considered in detail in most design guidelines.<br/></div> © 2022 American Society of Civil Engineers.},\nkey = {Towers},\n%keywords = {Image correlation;Transmissions;},\n%note = {Experimental investigations;Gusset plates;Key elements;Lattice towers;Monotonics;Overhead power lines;Plate geometry;Steel lattice;Tensile loading;Transmission line towers;},\nURL = {http://dx.doi.org/10.1061/9780784484463.029},\n} \n\n\n
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Steel lattice towers are commonly used in overhead power lines. Key elements of these towers are gusset plates, which connect and transmit forces between members. This paper presents an evaluation of the behavior and strength of lattice towers' gusset plates (LTGP) based on experimental investigation. The study presented herein was carried out at the Université de Sherbrooke and deals with a set of geometrically distinct conventional configurations subjected to monotonic tensile loading until failure. Digital image correlation (DIC) method was employed as a means of elucidating the mechanisms governing the behavior of bolted assemblies with gusset plates. The study revealed the influence of geometry in the behavior of bolted connections, a parameter which is generally not considered in detail in most design guidelines.
© 2022 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Effect of the driving system on Hardin-type resonant columns.\n \n \n \n \n\n\n \n Karray, M.; Abdellaziz, M.; and Lashin, I.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 59(9): 1685 - 1689. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"EffectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223812778048 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of the driving system on Hardin-type resonant columns},\njournal = {Canadian Geotechnical Journal},\nauthor = {Karray, Mourad and Abdellaziz, Mustapha and Lashin, Ibrahim},\nvolume = {59},\nnumber = {9},\nyear = {2022},\npages = {1685 - 1689},\nissn = {00083674},\nabstract = {<div data-language="eng" data-ev-field="abstract">Resonant column (RC) devices have been widely used for estimating the shear modulus and damping ratio over a broad range of shear strain amplitudes. Although RCs significantly improve the assessment of soil dynamic properties, some challenges mainly associated with the calibration process still exist. This paper discusses the effect of the driving system rigidity on the measurements performed on a Hardin-type RC. It is shown that the use of a rigid connection between the soil specimen and the driving mass could significantly influence the obtained results. The findings of this study indicate that the apparatus resonant frequency of the Hardin-type RC device should be lower than the resonant frequencies likely to be measured during testing of the specimens.<br/></div> © 2022 The Author(s).},\nkey = {Elastic moduli},\n%keywords = {Calibration;Natural frequencies;Shear flow;Shear strain;Soil mechanics;Soils;},\n%note = {Calibration process;Damping ratio;Driving systems;Dynamics properties;Modulus ratio;Resonant-column;Resonant-column devices;Rigid connection;Soil dynamics;Strain amplitude;},\nURL = {http://dx.doi.org/10.1139/cgj-2021-0094},\n} \n\n\n
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Resonant column (RC) devices have been widely used for estimating the shear modulus and damping ratio over a broad range of shear strain amplitudes. Although RCs significantly improve the assessment of soil dynamic properties, some challenges mainly associated with the calibration process still exist. This paper discusses the effect of the driving system rigidity on the measurements performed on a Hardin-type RC. It is shown that the use of a rigid connection between the soil specimen and the driving mass could significantly influence the obtained results. The findings of this study indicate that the apparatus resonant frequency of the Hardin-type RC device should be lower than the resonant frequencies likely to be measured during testing of the specimens.
© 2022 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Strain rate effect on static and dynamic behaviors of eastern Canada fine-grained soils.\n \n \n \n \n\n\n \n Abdellaziz, M.; Karray, M.; Betegard, J.; Locat, P.; Ledoux, C.; Mompin, R.; and Chekired, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 59(7): 1083 - 1095. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"StrainPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222712316251 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Strain rate effect on static and dynamic behaviors of eastern Canada fine-grained soils},\njournal = {Canadian Geotechnical Journal},\nauthor = {Abdellaziz, Mustapha and Karray, Mourad and Betegard, Jeudy and Locat, Pascal and Ledoux, Catherine and Mompin, Remi and Chekired, Mohamed},\nvolume = {59},\nnumber = {7},\nyear = {2022},\npages = {1083 - 1095},\nissn = {00083674},\nabstract = {<div data-language="eng" data-ev-field="abstract">The assessment of the strain rate effect on the geotechnical properties of soils constitutes an important step toward a more accurate analysis of their response. This study presents the experimental results of monotonic and cyclic simple shear tests performed to examine the strain rate ( _g ) effect on the behavior of eastern Canada soils. Nine natural soils sampled from different locations in eastern Canada were used in this study. The tests were performed on a simple shear device using a strain-controlled mode. In addition to the obtained experimental results, published data in the literature were used to draw the conclusions of this study. Analysis of the data indicates that the undrained shear strength (t<inf>f</inf> ) increases proportionally with the strain rate by approximately 6%–17% per log cycle of _g . The results also show that the secant shear modulus G increases with the strain rate, especially at large strain amplitudes. Moreover, the analysis of the data revealed that the extent of the strain rate effect seems to be correlated with the shear strain amplitude (g<inf>c</inf> ) and plasticity index (I<inf>p</inf> ). A practical application of the outcomes on the backbone curves is given, illustrating the influence of I<inf>p</inf> and g<inf>c</inf> on the effect of strain rate.<br/></div>},\nkey = {Soils},\n%keywords = {Elastic moduli;Geophysics;Geotechnical engineering;Shear flow;Shear strain;Shear strength;Soil mechanics;Soil testing;Strain rate;},\n%note = {Eastern Canada;Eastern canada soil;Fine-grained soils;Frequency effect;Geotechnical properties;Shears strength;Static and dynamic behaviours;Strain amplitude;Strain rate effect;Strain-rates;},\nURL = {http://dx.doi.org/10.1139/cgj-2021-0140},\n} \n\n\n
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The assessment of the strain rate effect on the geotechnical properties of soils constitutes an important step toward a more accurate analysis of their response. This study presents the experimental results of monotonic and cyclic simple shear tests performed to examine the strain rate ( _g ) effect on the behavior of eastern Canada soils. Nine natural soils sampled from different locations in eastern Canada were used in this study. The tests were performed on a simple shear device using a strain-controlled mode. In addition to the obtained experimental results, published data in the literature were used to draw the conclusions of this study. Analysis of the data indicates that the undrained shear strength (tf ) increases proportionally with the strain rate by approximately 6%–17% per log cycle of _g . The results also show that the secant shear modulus G increases with the strain rate, especially at large strain amplitudes. Moreover, the analysis of the data revealed that the extent of the strain rate effect seems to be correlated with the shear strain amplitude (gc ) and plasticity index (Ip ). A practical application of the outcomes on the backbone curves is given, illustrating the influence of Ip and gc on the effect of strain rate.
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\n \n\n \n \n \n \n \n \n Stability Analysis of an Overtopped Spillway Using Computational Fluid Dynamics.\n \n \n \n \n\n\n \n Freitas, M.; Leger, P.; and Pedroso, L.\n\n\n \n\n\n\n In volume 250, pages 43 - 56, Virtual, Online, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"StabilityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222612273915 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Stability Analysis of an Overtopped Spillway Using Computational Fluid Dynamics},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Freitas, M. and Leger, P. and Pedroso, L.},\nvolume = {250},\nyear = {2022},\npages = {43 - 56},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">Concrete gravity dams are usually designed to be non-overflow sections. However, due to global warming, flood events have become more frequent and more intense, possibly surpassing the amount of flow for which old structures were designed. Estimating the hydrodynamic forces acting on a dam or spillway during a flood is challenging. Typically, either simplified analytical solutions or complex and expensive physical models have been used. However, Computational Fluid Dynamics (CFD) is now an attractive alternative that can yield more accurate results than simplified analytical solutions while being cheaper and faster to implement than physical models. This paper presents a back analysis of the Chute Garneau concrete spillway during the Saguenay flood of 1996. During this event, the spillway bridge, which is 6.35 m high, was overtopped by about 2 m. There was a significant accumulation of floating debris that got stuck on the gates lifting structure. Some gates could not be opened because of ongoing rehabilitation work. Despite the severity of the flood, the structure survived the event. Herein, a CFD analysis is performed to obtain the hydrodynamic pressure fields on the structure under different scenarios, such as with gates open, closed, partially closed and with accumulation of floating debris. Then, the hydrodynamic pressure is integrated to obtain the resultant forces which are used as input to a stability analysis using the gravity method. It is shown that a small amount of cohesion and tensile strength on the rock-concrete interface, both very uncertain parameters, were mobilized to keep the structure stable.<br/></div> © 2022, Canadian Society for Civil Engineering.},\nkey = {Computational fluid dynamics},\n%keywords = {Analytical models;Concretes;Debris;Floods;Global warming;Hydrodynamics;Spillways;Tensile strength;Uncertainty analysis;},\n%note = {Back-analysis;Concrete gravity dams;Flood event;Hydrodynamic forces;Hydrodynamic pressure;Lifting structure;Non-overflow sections;Old structure;Physical modelling;Stability analyze;},\nURL = {http://dx.doi.org/10.1007/978-981-19-1065-4_4},\n} \n\n\n
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Concrete gravity dams are usually designed to be non-overflow sections. However, due to global warming, flood events have become more frequent and more intense, possibly surpassing the amount of flow for which old structures were designed. Estimating the hydrodynamic forces acting on a dam or spillway during a flood is challenging. Typically, either simplified analytical solutions or complex and expensive physical models have been used. However, Computational Fluid Dynamics (CFD) is now an attractive alternative that can yield more accurate results than simplified analytical solutions while being cheaper and faster to implement than physical models. This paper presents a back analysis of the Chute Garneau concrete spillway during the Saguenay flood of 1996. During this event, the spillway bridge, which is 6.35 m high, was overtopped by about 2 m. There was a significant accumulation of floating debris that got stuck on the gates lifting structure. Some gates could not be opened because of ongoing rehabilitation work. Despite the severity of the flood, the structure survived the event. Herein, a CFD analysis is performed to obtain the hydrodynamic pressure fields on the structure under different scenarios, such as with gates open, closed, partially closed and with accumulation of floating debris. Then, the hydrodynamic pressure is integrated to obtain the resultant forces which are used as input to a stability analysis using the gravity method. It is shown that a small amount of cohesion and tensile strength on the rock-concrete interface, both very uncertain parameters, were mobilized to keep the structure stable.
© 2022, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n Critical insights in laboratory shear wave velocity correlations of clays.\n \n \n \n \n\n\n \n Elbeggo, D.; Ethier, Y.; Dube, J.; and Karray, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 59(6): 935 - 951. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"CriticalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20222312193808 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Critical insights in laboratory shear wave velocity correlations of clays},\njournal = {Canadian Geotechnical Journal},\nauthor = {Elbeggo, Dania and Ethier, Yannic and Dube, Jean-Sebastien and Karray, Mourad},\nvolume = {59},\nnumber = {6},\nyear = {2022},\npages = {935 - 951},\nissn = {00083674},\nabstract = {<div data-language="eng" data-ev-field="abstract">Shear wave velocity, V<inf>s</inf>, is an important mechanical–dynamic parameter allowing the characterization of a soil in the elastic range (g < 10<sup>–3</sup>%). Thirty-five existing G<inf>max</inf> or V<inf>s</inf> laboratory correlations were examined in this study and are grouped into different general forms based on their geotechnical properties. A database of 11 eastern Canadian clay deposits was selected and used for the critical insights. The effect of the coefficient of earth pressure at rest, K<inf>0</inf>, was also examined. A range of variation for each general form of correlation was determined to take the plasticity index and void ratio values of investigated sites into account. The analysis shows a significant scatter in V<inf>s1</inf> values predicted by existing correlations and raises questions on the applicability of these correlations, especially for eastern Canadian clays. New correlations are proposed for Champlain clays based on laboratory measurement of V<inf>s</inf> using the piezoelectric ring-actuator technique, P-RAT, incorporated in consolidation cells. An analysis of P-RAT results reveals the sample disturbance effect and suggests an approach to correct the effect of disturbance on laboratory V<inf>s</inf> measurements. The applicability of the proposed correlations, including the disturbance correction, is validated by comparison with in situ measurements using multi-modal analysis of surface waves (MMASW).<br/></div> © Canadian Science Publishing. All rights reserved.},\nkey = {Surface waves},\n%keywords = {Acoustic wave velocity;Laboratories;Modal analysis;Piezoelectricity;Rats;Shear flow;Shear waves;Wave propagation;},\n%note = {Champlain;Champlain clay;Correlation;Eastern canadian clay;K0 coefficient;Multi-modal analyse of surface wave;Piezoelectric ring-actuator technique;Piezoelectric rings;Ring actuators;Shear wave velocity;Shear wave velocity (Vs);},\nURL = {http://dx.doi.org/10.1139/cgj-2020-0033},\n} \n\n\n
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Shear wave velocity, Vs, is an important mechanical–dynamic parameter allowing the characterization of a soil in the elastic range (g < 10–3%). Thirty-five existing Gmax or Vs laboratory correlations were examined in this study and are grouped into different general forms based on their geotechnical properties. A database of 11 eastern Canadian clay deposits was selected and used for the critical insights. The effect of the coefficient of earth pressure at rest, K0, was also examined. A range of variation for each general form of correlation was determined to take the plasticity index and void ratio values of investigated sites into account. The analysis shows a significant scatter in Vs1 values predicted by existing correlations and raises questions on the applicability of these correlations, especially for eastern Canadian clays. New correlations are proposed for Champlain clays based on laboratory measurement of Vs using the piezoelectric ring-actuator technique, P-RAT, incorporated in consolidation cells. An analysis of P-RAT results reveals the sample disturbance effect and suggests an approach to correct the effect of disturbance on laboratory Vs measurements. The applicability of the proposed correlations, including the disturbance correction, is validated by comparison with in situ measurements using multi-modal analysis of surface waves (MMASW).
© Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Feasibility of Strongback System in Storey Mechanism Mitigation of Steel Braced Frames.\n \n \n \n \n\n\n \n Chen, L.; Wang, S.; Athanasiou, A.; and Tirca, L.\n\n\n \n\n\n\n In volume 262 LNCE, pages 482 - 490, Timisoara, Romania, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"FeasibilityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222112138596 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Feasibility of Strongback System in Storey Mechanism Mitigation of Steel Braced Frames},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Chen, Lizhu and Wang, Shuaikang and Athanasiou, Anastasia and Tirca, Lucia},\nvolume = {262 LNCE},\nyear = {2022},\npages = {482 - 490},\nissn = {23662557},\naddress = {Timisoara, Romania},\nabstract = {<div data-language="eng" data-ev-field="abstract">Under earthquake loading, conventional braced frames are prone to storey mechanism. To mitigate this drawback, researchers have proposed to add an alternative vertical force path to redistribute member forces among floors. Likewise the dual system, the strongback acts as a vertical elastic spine and compensates for the loss of storey shear after braces of ductile system exhibited buckling. Nevertheless, the inelastic first mode and the elastic higher vibration modes excite the strongback, which could be installed interior or exterior to the braced frame. A design method for strongback braced frame is proposed and a case study consisting of a 4-storey office building in Victoria, BC, Canada, is presented. Numerical model was developed in the OpenSees environment and results from nonlinear response history analyses, expressed in terms of interstorey drift, residual drift, and floor acceleration, are presented. The hybrid system is able to mitigate the storey mechanism and enhances the building’s safety.<br/></div> © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Office buildings},\n%keywords = {Structural frames;Seismic response;Floors;Hybrid systems;},\n%note = {Braced frame;Conventional braced frames;Drift;Dual system;Earthquake loadings;Member forces;Steel braced frames;Storey mechanism;Strongback system;Vertical force;},\nURL = {http://dx.doi.org/10.1007/978-3-031-03811-2_50},\n} \n\n\n
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Under earthquake loading, conventional braced frames are prone to storey mechanism. To mitigate this drawback, researchers have proposed to add an alternative vertical force path to redistribute member forces among floors. Likewise the dual system, the strongback acts as a vertical elastic spine and compensates for the loss of storey shear after braces of ductile system exhibited buckling. Nevertheless, the inelastic first mode and the elastic higher vibration modes excite the strongback, which could be installed interior or exterior to the braced frame. A design method for strongback braced frame is proposed and a case study consisting of a 4-storey office building in Victoria, BC, Canada, is presented. Numerical model was developed in the OpenSees environment and results from nonlinear response history analyses, expressed in terms of interstorey drift, residual drift, and floor acceleration, are presented. The hybrid system is able to mitigate the storey mechanism and enhances the building’s safety.
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Seismic Response of Two-Bay Steel Multi-Tiered Concentrically Braced Frames.\n \n \n \n \n\n\n \n Comeau, C.; Cano, P.; Tremblay, R.; and Imanpour, A.\n\n\n \n\n\n\n In volume 262 LNCE, pages 388 - 395, Timisoara, Romania, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222112138583 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Response of Two-Bay Steel Multi-Tiered Concentrically Braced Frames},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Comeau, Christophe and Cano, Pablo and Tremblay, Robert and Imanpour, Ali},\nvolume = {262 LNCE},\nyear = {2022},\npages = {388 - 395},\nissn = {23662557},\naddress = {Timisoara, Romania},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper investigates the possibility of using multi-tiered concentrically braced frames in two adjacent column bays to resist seismic loads. Three prototype frames part of a single-storey building were chosen and designed using current knowledge of multi-tiered behaviour. The columns were selected to resist in-plane bending and axial loads arising from tensile yielding and compression buckling of braces in critical tiers. The lateral response of the frame was then examined using the nonlinear response history analyses under ground motion accelerations. The analyses confirmed that all frames exhibited nonuniform brace tensile yielding between tiers, which resulted in the concentration of inelastic drifts in the uppermost tiers. Peak storey drift values remained under 2.5%, although higher than the design predictions, which influenced the prediction of column in-plane bending.<br/></div> © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Structural frames},\n%keywords = {Bending moments;Seismic response;},\n%note = {'current;Braced frame;Compression buckling;Concentrically braced frames;In-plane axial;In-plane bending;Multi-bay;Multi-tiered;Seismic load;Single-storey buildings;},\nURL = {http://dx.doi.org/10.1007/978-3-031-03811-2_39},\n} \n\n\n
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This paper investigates the possibility of using multi-tiered concentrically braced frames in two adjacent column bays to resist seismic loads. Three prototype frames part of a single-storey building were chosen and designed using current knowledge of multi-tiered behaviour. The columns were selected to resist in-plane bending and axial loads arising from tensile yielding and compression buckling of braces in critical tiers. The lateral response of the frame was then examined using the nonlinear response history analyses under ground motion accelerations. The analyses confirmed that all frames exhibited nonuniform brace tensile yielding between tiers, which resulted in the concentration of inelastic drifts in the uppermost tiers. Peak storey drift values remained under 2.5%, although higher than the design predictions, which influenced the prediction of column in-plane bending.
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Seismic Behaviour and Design of Chevron Multi‐tiered Concentrically Braced Frames.\n \n \n \n \n\n\n \n Comeau, C.; Cano, P.; Imanpour, A.; and Tremblay, R.\n\n\n \n\n\n\n In volume 262 LNCE, pages 379 - 387, Timisoara, Romania, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222112138582 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Behaviour and Design of Chevron Multi‐tiered Concentrically Braced Frames},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Comeau, Christophe and Cano, Pablo and Imanpour, Ali and Tremblay, Robert},\nvolume = {262 LNCE},\nyear = {2022},\npages = {379 - 387},\nissn = {23662557},\naddress = {Timisoara, Romania},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper investigates the possibility of using the chevron bracing configuration for multi-tiered concentrically braced frames subjected to seismic excitations. A prototype two-tiered braced frame part of a single-storey building structure was designed using three different brace force scenarios for the roof beam and the intermediate strut. Columns were designed to resist the bending expected at the maximum anticipated storey drift. The lateral response of the frame was examined through nonlinear static and dynamic analyses. For all cases studied, frame lateral deformations tend to concentrate in the first tier, where brace buckling initiated first, due to the reduced tier lateral stiffness in the brace post-buckling range. The flexural action in the intermediate struts was engaged when a reduced force was used for tension-acting braces in design, limiting nonlinear response in braces. Finally, the frames exhibited stable inelastic response with limited residual deformations, as a result of the re-centring capacity provided by the strut acting in flexure.<br/></div> © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Struts},\n%keywords = {Roofs;Structural frames;Buckling;Deformation;Seismic design;Seismology;},\n%note = {Beam yielding;Brace buckling;Bracing configuration;Chevron braced frames;Chevron bracings;Concentrically braced frames;Multi-tiered;Multi-tiered chevron braced frame;Seismic behaviour;Seismic excitations;},\nURL = {http://dx.doi.org/10.1007/978-3-031-03811-2_38},\n} \n\n\n
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This paper investigates the possibility of using the chevron bracing configuration for multi-tiered concentrically braced frames subjected to seismic excitations. A prototype two-tiered braced frame part of a single-storey building structure was designed using three different brace force scenarios for the roof beam and the intermediate strut. Columns were designed to resist the bending expected at the maximum anticipated storey drift. The lateral response of the frame was examined through nonlinear static and dynamic analyses. For all cases studied, frame lateral deformations tend to concentrate in the first tier, where brace buckling initiated first, due to the reduced tier lateral stiffness in the brace post-buckling range. The flexural action in the intermediate struts was engaged when a reduced force was used for tension-acting braces in design, limiting nonlinear response in braces. Finally, the frames exhibited stable inelastic response with limited residual deformations, as a result of the re-centring capacity provided by the strut acting in flexure.
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Effective Steel Braced Frames for Tall Building Applications in High Seismic Regions.\n \n \n \n \n\n\n \n Hariri, B.; and Tremblay, R.\n\n\n \n\n\n\n In volume 262 LNCE, pages 361 - 369, Timisoara, Romania, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"EffectivePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20222112138580 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effective Steel Braced Frames for Tall Building Applications in High Seismic Regions},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Hariri, Bashar and Tremblay, Robert},\nvolume = {262 LNCE},\nyear = {2022},\npages = {361 - 369},\nissn = {23662557},\naddress = {Timisoara, Romania},\nabstract = {<div data-language="eng" data-ev-field="abstract">Steel braced frames are commonly used for building structures in seismic active regions. However, steel braced frame systems are limited to low- and medium rise structures because they are prone to concentration of inelastic demand resulting from adverse P-Δ effects and lack of vertical stiffness continuity. The article introduces a modified inverted-V buckling braced frame configuration in which one of two bracing members at every level is replaced with a conventional brace designed to remain elastic and form with the beam member an elastic secondary system providing the system with positive post-yielding storey shear stiffness annihilating P-Δ effects upon yielding of the BRB members and ensuring stable seismic response for tall building applications. The anticipated behaviour and design approach of the proposed E-BRBF system is first described. The stability of the system is then verified through nonlinear response history analysis for 20-, 30- and 40-storey buildings subjected to ground motions from shallow crustal, subduction in-slab, and subduction interface earthquakes. The analysis results are compared to those obtained with conventional BRBFs. The comparison shows that the proposed E-BRBF system can significantly enhance the seismic response of tall buildings, with reduced and more evenly distributed peak storey drift demand over the structure height.<br/></div> © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Stiffness},\n%keywords = {System stability;Seismic response;Structural frames;Shear flow;Buckling;Tall buildings;Earthquakes;},\n%note = {Active regions;Buckling restrained braces;Building applications;Building structure;P-delta effects;Post-yielding;Post-yielding stiffness;Seismic regions;Soft-storey response;Steel braced frames;},\nURL = {http://dx.doi.org/10.1007/978-3-031-03811-2_36},\n} \n\n\n
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Steel braced frames are commonly used for building structures in seismic active regions. However, steel braced frame systems are limited to low- and medium rise structures because they are prone to concentration of inelastic demand resulting from adverse P-Δ effects and lack of vertical stiffness continuity. The article introduces a modified inverted-V buckling braced frame configuration in which one of two bracing members at every level is replaced with a conventional brace designed to remain elastic and form with the beam member an elastic secondary system providing the system with positive post-yielding storey shear stiffness annihilating P-Δ effects upon yielding of the BRB members and ensuring stable seismic response for tall building applications. The anticipated behaviour and design approach of the proposed E-BRBF system is first described. The stability of the system is then verified through nonlinear response history analysis for 20-, 30- and 40-storey buildings subjected to ground motions from shallow crustal, subduction in-slab, and subduction interface earthquakes. The analysis results are compared to those obtained with conventional BRBFs. The comparison shows that the proposed E-BRBF system can significantly enhance the seismic response of tall buildings, with reduced and more evenly distributed peak storey drift demand over the structure height.
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Seismic Design of Foundations for Steel-Framed Buildings: A Canadian Perspective.\n \n \n \n \n\n\n \n Koboevic, S.; Murugananthan, U.; Reyes-Fernandez, A.; Madani, H. M.; and Wiebe, L.\n\n\n \n\n\n\n In volume 262 LNCE, pages 1089 - 1096, Timisoara, Romania, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222112138548 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Design of Foundations for Steel-Framed Buildings: A Canadian Perspective},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Koboevic, Sanda and Murugananthan, Ushanthan and Reyes-Fernandez, Angel and Madani, Hamid M. and Wiebe, Lydell},\nvolume = {262 LNCE},\nyear = {2022},\npages = {1089 - 1096},\nissn = {23662557},\naddress = {Timisoara, Romania},\nabstract = {<div data-language="eng" data-ev-field="abstract">Provisions for the seismic design of foundations have changed significantly in recent editions of Canadian codes and standards. Considering that the foundations are constructed using reinforced concrete, these requirements were developed mainly based on Canadian studies of the seismic response of RC shear walls. Hence, they may be less adapted to steel braced frame systems and the particularities of their seismic behaviour and design, such as a distributed yielding mechanism and a differentiation between the nominal and probable capacities of ductile elements. This may lead to overly conservative design estimates of the demands on foundations and the total building drifts, adversely affecting not only the foundations themselves by increasing their size and cost, but also the choice of steel as the material for the seismic force resisting system. This paper presents an overview of Canadian provisions for the seismic design of foundations and critically assesses their applicability to the foundations of steel concentrically braced frames. The design procedure is illustrated with the example of 3-storey steel buildings with X-type tension-compression bracing, located in Vancouver and Montreal and designed following the National Building Code of Canada and the associated editions of the concrete and steel design standards. The seismic response is examined using nonlinear time history analysis, where a numerical model developed in OpenSees integrates inelastic frame behaviour and nonlinear soil response. The results clearly demonstrate the shortcomings of current foundation design procedures when applied to steel frames. Possible solutions to overcome these limitations with an improved design methodology are discussed.<br/></div> © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Seismic design},\n%keywords = {Seismic response;Architectural design;Nonlinear analysis;Structural frames;Soil structure interactions;Reinforced concrete;},\n%note = {Braced frame;Codes and standards;Conservative designs;Design procedure;Frame systems;Seismic behaviour;Soil-structure interaction;Steel braced frames;Steel framed buildings;Yielding mechanisms;},\nURL = {http://dx.doi.org/10.1007/978-3-031-03811-2_121},\n} \n\n\n
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Provisions for the seismic design of foundations have changed significantly in recent editions of Canadian codes and standards. Considering that the foundations are constructed using reinforced concrete, these requirements were developed mainly based on Canadian studies of the seismic response of RC shear walls. Hence, they may be less adapted to steel braced frame systems and the particularities of their seismic behaviour and design, such as a distributed yielding mechanism and a differentiation between the nominal and probable capacities of ductile elements. This may lead to overly conservative design estimates of the demands on foundations and the total building drifts, adversely affecting not only the foundations themselves by increasing their size and cost, but also the choice of steel as the material for the seismic force resisting system. This paper presents an overview of Canadian provisions for the seismic design of foundations and critically assesses their applicability to the foundations of steel concentrically braced frames. The design procedure is illustrated with the example of 3-storey steel buildings with X-type tension-compression bracing, located in Vancouver and Montreal and designed following the National Building Code of Canada and the associated editions of the concrete and steel design standards. The seismic response is examined using nonlinear time history analysis, where a numerical model developed in OpenSees integrates inelastic frame behaviour and nonlinear soil response. The results clearly demonstrate the shortcomings of current foundation design procedures when applied to steel frames. Possible solutions to overcome these limitations with an improved design methodology are discussed.
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Seismic Force Demands on the Foundations of Concentrically Braced Frame Systems.\n \n \n \n \n\n\n \n Madani, H. M.; Wiebe, L.; Koboevic, S.; and Guo, P.\n\n\n \n\n\n\n In volume 262 LNCE, pages 449 - 456, Timisoara, Romania, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222112138591 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Force Demands on the Foundations of Concentrically Braced Frame Systems},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Madani, Hamid M. and Wiebe, Lydell and Koboevic, Sanda and Guo, Peijun},\nvolume = {262 LNCE},\nyear = {2022},\npages = {449 - 456},\nissn = {23662557},\naddress = {Timisoara, Romania},\nabstract = {<div data-language="eng" data-ev-field="abstract">Concentrically braced frames (CBFs) are widely used as lateral force-resisting systems in North America. Canadian seismic design requirements for building foundations distinguish between two foundation types: capacity protected and non-capacity protected (commonly known as "rocking" foundation). For steel bracing systems such as CBFs, there are major ambiguities in how to calculate the foundation design forces, as the governing force for both foundation types is influenced by the capacity of the braces, which have an uncertain overstrength, and by the timing of braces reaching their peak force, which may or may not be simultaneous. In addition, the superstructure, foundation, and underlying soil interact in response to seismic loads, which further influences design force estimates. Therefore, there is a need to better understand the actual force demands on CBF foundations. This study considers example 2-storey and 5-storey steel frame buildings with tension-compression X-bracing, designed for Vancouver, Canada, in accordance with the 2015 National Building Code and the Canadian steel and concrete design standards. The increased drifts of the braced bay caused by foundation rotations are assessed using simplified procedures and included in the design. The buildings are analyzed using advanced numerical models in OpenSees, including brace buckling and P-Delta effects. The results obtained for fixed-base conditions are compared to those including foundation flexibility. For the latter, the effects of soil-structure interaction are represented using nonlinear spring models that can capture foundation rocking and sliding as well as the soil settlement. The results of this study confirm that the Canadian concrete standard estimates reasonably well the demands on the foundations regardless of foundation flexibility but suggest that further study is needed to verify this more reliably.<br/></div> © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Nonlinear analysis},\n%keywords = {Seismic design;Structural frames;Piles;Soils;Architectural design;Seismology;Soil structure interactions;},\n%note = {Building foundations;Concentrically braced frames;Foundation types;Frame systems;Lateral force resisting system;Rocking foundations;Seismic demands;Seismic forces;Soil-foundation-structure interactions;Steel bracing;},\nURL = {http://dx.doi.org/10.1007/978-3-031-03811-2_46},\n} \n\n\n
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Concentrically braced frames (CBFs) are widely used as lateral force-resisting systems in North America. Canadian seismic design requirements for building foundations distinguish between two foundation types: capacity protected and non-capacity protected (commonly known as \"rocking\" foundation). For steel bracing systems such as CBFs, there are major ambiguities in how to calculate the foundation design forces, as the governing force for both foundation types is influenced by the capacity of the braces, which have an uncertain overstrength, and by the timing of braces reaching their peak force, which may or may not be simultaneous. In addition, the superstructure, foundation, and underlying soil interact in response to seismic loads, which further influences design force estimates. Therefore, there is a need to better understand the actual force demands on CBF foundations. This study considers example 2-storey and 5-storey steel frame buildings with tension-compression X-bracing, designed for Vancouver, Canada, in accordance with the 2015 National Building Code and the Canadian steel and concrete design standards. The increased drifts of the braced bay caused by foundation rotations are assessed using simplified procedures and included in the design. The buildings are analyzed using advanced numerical models in OpenSees, including brace buckling and P-Delta effects. The results obtained for fixed-base conditions are compared to those including foundation flexibility. For the latter, the effects of soil-structure interaction are represented using nonlinear spring models that can capture foundation rocking and sliding as well as the soil settlement. The results of this study confirm that the Canadian concrete standard estimates reasonably well the demands on the foundations regardless of foundation flexibility but suggest that further study is needed to verify this more reliably.
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Dual System for Enhanced Seismic Performance of Friction-Sliding Braced Frames.\n \n \n \n \n\n\n \n Millichamp, D.; and Tirca, L.\n\n\n \n\n\n\n In volume 262 LNCE, pages 641 - 649, Timisoara, Romania, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"DualPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222112138615 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Dual System for Enhanced Seismic Performance of Friction-Sliding Braced Frames},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Millichamp, Derek and Tirca, Lucia},\nvolume = {262 LNCE},\nyear = {2022},\npages = {641 - 649},\nissn = {23662557},\naddress = {Timisoara, Romania},\nabstract = {<div data-language="eng" data-ev-field="abstract">Pall friction dampers (PFD) installed in braced frames have been shown to exhibit large energy dissipation. Nevertheless, in high-risk seismic zones, the Friction-Sliding Braced Frame (FSBF) is prone to large residual interstorey drifts (RISD) and weak-storey mechanism formation. To solve this drawback, a backup moment resisting frame (MRF) was added in parallel to the FSBF and the system is analysed as dual (D-FSBF). Considering a force-based design approach, the dual system was evaluated for the assumptions that the backup MRF’s columns have fixed-bases and the damper’s stroke length allows interstorey drifts within the code limit. In this paper, the failure hierarchy criteria is defined and the parameters analysed are the MRF’s base fixity condition and the PFD’s stroke length, as well as, their effects on the global seismic response. Results from nonlinear response history analyses using OpenSees demonstrated that the D-FSBF with a fixed-base MRF encountered undesirable MRF column failure caused by increased moment demand at the bottom floor. Conversely, when pinned-base MRF is employed, the D-FSBF system subjected to earthquake loads is able to achieve the failure hierarchy. However, the seismic response of D-FSBF at design level is unaffected by the MRF base connection flexibility.<br/></div> © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Friction},\n%keywords = {Energy dissipation;Magnetorheological fluids;Seismic design;Seismic response;Structural frames;},\n%note = {Braced frame;Dual system;Fixed base;Friction damper;Friction sliding brace;Moment resisting frames;Residual drifts;Seismic Performance;Seismic zones;Stroke length;},\nURL = {http://dx.doi.org/10.1007/978-3-031-03811-2_69},\n} \n\n\n
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Pall friction dampers (PFD) installed in braced frames have been shown to exhibit large energy dissipation. Nevertheless, in high-risk seismic zones, the Friction-Sliding Braced Frame (FSBF) is prone to large residual interstorey drifts (RISD) and weak-storey mechanism formation. To solve this drawback, a backup moment resisting frame (MRF) was added in parallel to the FSBF and the system is analysed as dual (D-FSBF). Considering a force-based design approach, the dual system was evaluated for the assumptions that the backup MRF’s columns have fixed-bases and the damper’s stroke length allows interstorey drifts within the code limit. In this paper, the failure hierarchy criteria is defined and the parameters analysed are the MRF’s base fixity condition and the PFD’s stroke length, as well as, their effects on the global seismic response. Results from nonlinear response history analyses using OpenSees demonstrated that the D-FSBF with a fixed-base MRF encountered undesirable MRF column failure caused by increased moment demand at the bottom floor. Conversely, when pinned-base MRF is employed, the D-FSBF system subjected to earthquake loads is able to achieve the failure hierarchy. However, the seismic response of D-FSBF at design level is unaffected by the MRF base connection flexibility.
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Investigation of small-to large-strain moduli correlations of rockfill materials — application to Romaine-2 dam.\n \n \n \n \n\n\n \n Lashin, I.; Ghali, M.; Smith, M.; Verret, D.; and Karray, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 59(5): 715 - 725. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"InvestigationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221912089010 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigation of small-to large-strain moduli correlations of rockfill materials — application to Romaine-2 dam},\njournal = {Canadian Geotechnical Journal},\nauthor = {Lashin, Ibrahim and Ghali, Michael and Smith, Marc and Verret, Daniel and Karray, Mourad},\nvolume = {59},\nnumber = {5},\nyear = {2022},\npages = {715 - 725},\nissn = {00083674},\nabstract = {<div data-language="eng" data-ev-field="abstract">The establishment of relationships between the shear wave velocity (V<inf>s</inf>) and other geotechnical parameters of rockfills under large strains (e.g., oedometer-constrained modulus, M<inf>oedo</inf>, and tangent elastic modulus, E<inf>t</inf>) is a significant step toward precise modeling of earth structure stress–strain behavior. In this study, four specimens reconstituted from the rockfill used for Romaine-2 dam construction were investigated experimentally to correlate small-strain to large-strain moduli. The development of M<inf>oedo</inf> and V<inf>s</inf> with consolidation was measured in a laboratory using the piezoelectric ring-actuator technique (P-RAT) incorporated in a large oedometer cell. A correlation between M<inf>oedo</inf> and the small-strain shear modulus (G<inf>o</inf>) was proposed. Moreover, numerical simulations were performed using the Duncan–Chang hyperbolic model to correlate V<inf>s</inf> and the Duncan–Chang initial elastic modulus (E<inf>i</inf>), which depends on the minor principal stress (s<inf>3</inf>). Based on the experimental and numerical data, a relationship between the E<inf>i</inf> and V<inf>s</inf> of the rockfill specimens was established. Verification studies were also performed using in situ measurements obtained from the Romaine-2 dam construction, and the ability of the proposed relationships to predict E<inf>i</inf> from in situ V<inf>s</inf> measurements was demonstrated. The proposed correlations can help geotechnical designers estimate the deformation characteristics of rockfill materials from in situ V<inf>s</inf> measurements.<br/></div> © 2021 The Author(s).},\nkey = {Elastic moduli},\n%keywords = {Shear waves;Acoustic wave velocity;Rock mechanics;Wave propagation;Rocks;Dams;Piezoelectricity;Shear flow;Rats;Shear strain;},\n%note = {Dam construction;Duncan Chang model;Large strains;Material application;Piezoelectric ring-actuator technique;Piezoelectric rings;Ring actuators;Rock fill materials;Rock Fills;Shear wave velocity;},\nURL = {http://dx.doi.org/10.1139/cgj-2021-0113},\n} \n\n\n
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The establishment of relationships between the shear wave velocity (Vs) and other geotechnical parameters of rockfills under large strains (e.g., oedometer-constrained modulus, Moedo, and tangent elastic modulus, Et) is a significant step toward precise modeling of earth structure stress–strain behavior. In this study, four specimens reconstituted from the rockfill used for Romaine-2 dam construction were investigated experimentally to correlate small-strain to large-strain moduli. The development of Moedo and Vs with consolidation was measured in a laboratory using the piezoelectric ring-actuator technique (P-RAT) incorporated in a large oedometer cell. A correlation between Moedo and the small-strain shear modulus (Go) was proposed. Moreover, numerical simulations were performed using the Duncan–Chang hyperbolic model to correlate Vs and the Duncan–Chang initial elastic modulus (Ei), which depends on the minor principal stress (s3). Based on the experimental and numerical data, a relationship between the Ei and Vs of the rockfill specimens was established. Verification studies were also performed using in situ measurements obtained from the Romaine-2 dam construction, and the ability of the proposed relationships to predict Ei from in situ Vs measurements was demonstrated. The proposed correlations can help geotechnical designers estimate the deformation characteristics of rockfill materials from in situ Vs measurements.
© 2021 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Characterization of the Lateral Response of Base Rocking Steel Bridge Piers.\n \n \n \n \n\n\n \n Rahmzadeh, A.; Alam, M.; and Tremblay, R.\n\n\n \n\n\n\n In volume 244, pages 545 - 552, Virtual, Online, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"CharacterizationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20221812047083 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Characterization of the Lateral Response of Base Rocking Steel Bridge Piers},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Rahmzadeh, A. and Alam, M.S. and Tremblay, R.},\nvolume = {244},\nyear = {2022},\npages = {545 - 552},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">In light of the need to mitigate direct and indirect losses due to earthquakes, research in the recent decades has focused on the development of high-performance seismic resisting systems that possess a high level of protection and sustain minimal structural damage during an earthquake. Rocking structures are amongst such technologies that have garnered a great deal of attention. This paper summarizes the results of an experimental program on the lateral cyclic behaviour of post-tensioned rocking steel bridge column specimens designed to rock at the interface with the foundation. The effect of column wall thickness, presence of a base plate and supplemental energy dissipation devices is briefly discussed. The finite element (FE) simulation procedure and verification of 3D continuum models of the tested specimens are presented. It is shown that the FE method is able to accurately predict the cyclic response of the system. Then, the model is simplified for a parametric study to characterize the lateral cyclic response of the system. The varied parameters are diameter and thickness of the tube, diameter and thickness of the base plate, initial axial force ratio due to superstructure load, cross-sectional area of the tendon, and the amount of posttensioning force. It is demonstrated that cyclic performance of the system is dependent on the total initial axial force and diameter-to-thickness ratio of the tube. By proper selection of these two parameters, local buckling can be avoided, and the system is able to maintain its self-centering property in multiple earthquakes.<br/></div> © 2022, Canadian Society for Civil Engineering.},\nkey = {Earthquakes},\n%keywords = {Energy dissipation;Axial flow;Continuum mechanics;Plates (structural components);},\n%note = {Base plates;Cyclic behavior;Earthquake research;Experimental program;Lateral response;Levels of protections;Post tensioned;Seismic resisting system;Steel bridge piers;Structural damages;},\nURL = {http://dx.doi.org/10.1007/978-981-19-0656-5_46},\n} \n\n\n
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In light of the need to mitigate direct and indirect losses due to earthquakes, research in the recent decades has focused on the development of high-performance seismic resisting systems that possess a high level of protection and sustain minimal structural damage during an earthquake. Rocking structures are amongst such technologies that have garnered a great deal of attention. This paper summarizes the results of an experimental program on the lateral cyclic behaviour of post-tensioned rocking steel bridge column specimens designed to rock at the interface with the foundation. The effect of column wall thickness, presence of a base plate and supplemental energy dissipation devices is briefly discussed. The finite element (FE) simulation procedure and verification of 3D continuum models of the tested specimens are presented. It is shown that the FE method is able to accurately predict the cyclic response of the system. Then, the model is simplified for a parametric study to characterize the lateral cyclic response of the system. The varied parameters are diameter and thickness of the tube, diameter and thickness of the base plate, initial axial force ratio due to superstructure load, cross-sectional area of the tendon, and the amount of posttensioning force. It is demonstrated that cyclic performance of the system is dependent on the total initial axial force and diameter-to-thickness ratio of the tube. By proper selection of these two parameters, local buckling can be avoided, and the system is able to maintain its self-centering property in multiple earthquakes.
© 2022, Canadian Society for Civil Engineering.\n
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\n \n\n \n \n \n \n \n \n A SIMPLE METHOD FOR A RELIABLE MODELLING OF THE NONLINEAR BEHAVIOUR OF BOLTED CONNECTIONS IN STEEL LATTICE TOWERS.\n \n \n \n \n\n\n \n Pourshargh, F.; Legeron, F. P.; Langlois, S.; and Saoud, K. S.\n\n\n \n\n\n\n Advanced Steel Construction, 18(1): 479 - 487. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221311846405 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A SIMPLE METHOD FOR A RELIABLE MODELLING OF THE NONLINEAR BEHAVIOUR OF BOLTED CONNECTIONS IN STEEL LATTICE TOWERS},\njournal = {Advanced Steel Construction},\nauthor = {Pourshargh, Farshad and Legeron, Frederic P. and Langlois, Sebastien and Saoud, Kahina Sad},\nvolume = {18},\nnumber = {1},\nyear = {2022},\npages = {479 - 487},\nissn = {1816112X},\nabstract = {<div data-language="eng" data-ev-field="abstract">The behaviour of bolted connections in steel lattice transmission line towers affects their load-bearing capacity and failure mode. Bolted connections are commonly modelled as pinned or fixed joints, but their behaviour lies between these two extremes and evolves in a nonlinear manner. Accordingly, an accurate finite element modelling of the structural response of complete steel lattice towers requires the consideration of various nonlinear phenomena involved in bolted connexions, such as bolt slippage. In this study, a practical method is proposed for the modelling of the nonlinear response of steel lattice tower connections involving one or multiple bolts. First, the local load-deformation behaviour of single-bolt lap connections is evaluated analytically depending on various geometric and material parameters and construction details. Then, the predicted nonlinear behaviour for a given configuration serves as an input to a 2D/3D numerical model of the entire assembly of plates in which the bolted joints are represented as discrete elements. For comparison purposes, an extensive experimental study comprising forty-four tests were conducted on steel plates assembled with one or two bolts. This approach is also extended to simulate the behaviour of assemblies including four bolts and the obtained results are checked against experimental datasets from the literature. The obtained results show that the proposed method can predict accurately the response of a variety of multi-bolt connections. A potential application of the strategy developed in this paper could be in the numerical modelling of full-scale steel lattice towers, particularly for a reliable estimation of the displacements.<br/></div> © 2022 by The Hong Kong Institute of Steel Construction. All rights reserved.},\nkey = {Bolts},\n%keywords = {Numerical models;Finite element method;Plates (structural components);Towers;Bolted joints;Failure (mechanical);Steel structures;},\n%note = {Bolt slippage;Bolted connections;Lattice towers;Load-bearing capacity;Nonlinear behaviours;Reliable models;SIMPLE method;Steel lattice;Steel lattice tower;Transmission line towers;},\nURL = {http://dx.doi.org/10.18057/IJASC.2022.18.1.6},\n} \n\n\n
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The behaviour of bolted connections in steel lattice transmission line towers affects their load-bearing capacity and failure mode. Bolted connections are commonly modelled as pinned or fixed joints, but their behaviour lies between these two extremes and evolves in a nonlinear manner. Accordingly, an accurate finite element modelling of the structural response of complete steel lattice towers requires the consideration of various nonlinear phenomena involved in bolted connexions, such as bolt slippage. In this study, a practical method is proposed for the modelling of the nonlinear response of steel lattice tower connections involving one or multiple bolts. First, the local load-deformation behaviour of single-bolt lap connections is evaluated analytically depending on various geometric and material parameters and construction details. Then, the predicted nonlinear behaviour for a given configuration serves as an input to a 2D/3D numerical model of the entire assembly of plates in which the bolted joints are represented as discrete elements. For comparison purposes, an extensive experimental study comprising forty-four tests were conducted on steel plates assembled with one or two bolts. This approach is also extended to simulate the behaviour of assemblies including four bolts and the obtained results are checked against experimental datasets from the literature. The obtained results show that the proposed method can predict accurately the response of a variety of multi-bolt connections. A potential application of the strategy developed in this paper could be in the numerical modelling of full-scale steel lattice towers, particularly for a reliable estimation of the displacements.
© 2022 by The Hong Kong Institute of Steel Construction. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Experimental investigation and numerical modeling of piezoelectric bender element motion and wave propagation analysis in soils.\n \n \n \n \n\n\n \n Liu, H.; Cascante, G.; Maghoul, P.; and Shalaby, A.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 59(3): 330 - 341. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20221011747557 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental investigation and numerical modeling of piezoelectric bender element motion and wave propagation analysis in soils},\njournal = {Canadian Geotechnical Journal},\nauthor = {Liu, Hongwei and Cascante, Giovanni and Maghoul, Pooneh and Shalaby, Ahmed},\nvolume = {59},\nnumber = {3},\nyear = {2022},\npages = {330 - 341},\nissn = {00083674},\nabstract = {<div data-language="eng" data-ev-field="abstract">The bender element (BE) test has been widely used for the dynamic characterization of soil specimens at low-shear strain levels. However, the actual behavior of the BE inside a soil specimen remains unknown. Thus, the current ASTM standard does not consider the interference of compressional and shear waves in BE testing, which can lead to significant errors in the evaluation of shear wave velocities. The main objective of this paper is to present a numerical model of the BE system to better understand the response of the BEs inside a soil sample. The model is calibrated, verified, and then used to demonstrate the importance of taking into consideration the interaction between compressional and shear waves for the correct interpretation of BE measurements. The model successfully captured the measured vibrations of the BE in air as well as inside transparent soils. More importantly, the numerical simulations provide a new understating of the significant interactions of P waves and S waves especially in clay soils. Thus, the proposed coupled piezoelectric and solid mechanics model can be used to study the soil–BE interaction so that sound recommendations can be given to improve the interpretation of BE tests in different soils.<br/></div> © 2021 The Author(s).},\nkey = {Finite element method},\n%keywords = {ASTM standards;Clay;Numerical methods;Numerical models;Piezoelectricity;Seismic waves;Shear flow;Shear strain;Shear waves;Stiffness;Wave propagation;},\n%note = {Bender element tests;Bender elements;Compressional;Experimental investigations;Laser vibrometers;Piezoelectric;Piezoelectric benders;Propagation analysis;Soil specimens;Solid mechanics;},\nURL = {http://dx.doi.org/10.1139/cgj-2020-0757},\n} \n\n\n
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The bender element (BE) test has been widely used for the dynamic characterization of soil specimens at low-shear strain levels. However, the actual behavior of the BE inside a soil specimen remains unknown. Thus, the current ASTM standard does not consider the interference of compressional and shear waves in BE testing, which can lead to significant errors in the evaluation of shear wave velocities. The main objective of this paper is to present a numerical model of the BE system to better understand the response of the BEs inside a soil sample. The model is calibrated, verified, and then used to demonstrate the importance of taking into consideration the interaction between compressional and shear waves for the correct interpretation of BE measurements. The model successfully captured the measured vibrations of the BE in air as well as inside transparent soils. More importantly, the numerical simulations provide a new understating of the significant interactions of P waves and S waves especially in clay soils. Thus, the proposed coupled piezoelectric and solid mechanics model can be used to study the soil–BE interaction so that sound recommendations can be given to improve the interpretation of BE tests in different soils.
© 2021 The Author(s).\n
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\n \n\n \n \n \n \n \n \n Seismic reliability assessment of base-isolated bridges in Quebec.\n \n \n \n \n\n\n \n Nassar, M.; Guizani, L.; Nollet, M.; and Tahan, A.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 49(2): 242 - 254. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20220611598598 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic reliability assessment of base-isolated bridges in Quebec},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Nassar, Mohamad and Guizani, L. and Nollet, M.-J. and Tahan, A.},\nvolume = {49},\nnumber = {2},\nyear = {2022},\npages = {242 - 254},\nissn = {03151468},\nabstract = {<div data-language="eng" data-ev-field="abstract">The aim of this work is to estimate the seismic reliability of a simple typical two-span lifeline base-isolated bridge designed to behave essentially elastic or as per the Canadian Highway Bridge Design Code, for seven localities in Quebec. Two limit states are considered for possible failure due to unacceptable damage: flexure at the pier-base and displacement within the seismic isolation systems (SIS). The main problem random variables considered and modeled are seismic hazard, temperature, pier base dimensions, and material mechanical properties. The Monte Carlo method was used to evaluate the probability of failure and the reliability of each limit state. Preliminary results reveal that notwithstanding the large temperature and seismic hazard variabilities between the seven sites in Quebec, the global bridge reliability indices are almost uniform, approximately 3.45 6 0.02. Furthermore, the security factor (i.e., 1.25) on the SIS displacement capacity results in reliability indices for SIS displacement that are not levelled with the flexural reliability indices and requires further examination and consideration.<br/></div> © Canadian Science Publishing. All rights reserved.},\nkey = {Monte Carlo methods},\n%keywords = {Seismic design;Reliability;Seismic response;Hazards;Highway bridges;Highway planning;Piers;},\n%note = {Base-isolated bridges;Limit state;Limit state designs;Lows-temperatures;Reliability Index;Reliability-based;Reliability-based approach;Seismic base isolation;Seismic isolation systems;Seismic reliability;},\nURL = {http://dx.doi.org/10.1139/cjce-2020-0036},\n} \n\n\n
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\n
The aim of this work is to estimate the seismic reliability of a simple typical two-span lifeline base-isolated bridge designed to behave essentially elastic or as per the Canadian Highway Bridge Design Code, for seven localities in Quebec. Two limit states are considered for possible failure due to unacceptable damage: flexure at the pier-base and displacement within the seismic isolation systems (SIS). The main problem random variables considered and modeled are seismic hazard, temperature, pier base dimensions, and material mechanical properties. The Monte Carlo method was used to evaluate the probability of failure and the reliability of each limit state. Preliminary results reveal that notwithstanding the large temperature and seismic hazard variabilities between the seven sites in Quebec, the global bridge reliability indices are almost uniform, approximately 3.45 6 0.02. Furthermore, the security factor (i.e., 1.25) on the SIS displacement capacity results in reliability indices for SIS displacement that are not levelled with the flexural reliability indices and requires further examination and consideration.
© Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Compressive Behaviour of Glass Fiber-Reinforced Polymer (GFRP) Reinforced Concrete Columns.\n \n \n \n \n\n\n \n Abed, F.; El Refai, A.; and ElMesalami, N.\n\n\n \n\n\n\n In volume 198 LNCE, pages 851 - 858, Virtual, Online, 2022. \n \n\n\n\n
\n\n\n\n \n \n \"CompressivePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20220111412830 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Compressive Behaviour of Glass Fiber-Reinforced Polymer (GFRP) Reinforced Concrete Columns},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Abed, Farid and El Refai, Ahmed and ElMesalami, Nouran},\nvolume = {198 LNCE},\nyear = {2022},\npages = {851 - 858},\nissn = {23662557},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">Fiber-reinforced polymer (FRP) bars offer several advantages over steel bars, including higher tensile strength, lighter weight, and non-corrosiveness. There is currently an increased use of FRP-reinforced concrete structures worldwide. However, due to the low compressive strength and modulus of FRP bars, current FRP design codes such as ACI 440.1R-15 and CSA S806-12, neglect the contribution of FRP bars to the ultimate compressive capacities of reinforced concrete columns. This study aims at investigating the feasibility of using glass FRP (GFRP) bars as internal reinforcement in concrete columns, subject to concentric and eccentric loading. A total of four 180 mm × 180 mm square RC columns with heights of 1000 mm and 1100 mm were tested, including two GFRP-RC columns and two steel-RC columns. One GFRP-RC column was tested under concentric loading, and the other was tested under eccentric loading at an eccentricity-to-width ratio of 44.4%. The two steel-RC columns were replicates of the two GFRP-RC columns, and served as control specimens. All columns were cast with normal strength concrete of 34 MPa compressive strength and had the same longitudinal reinforcement ratio of 2.48%. Steel ties of 10 mm diameter spaced at 180 mm were used as transverse reinforcements in all columns. The results showed that GFRP-RC columns had lower load-carrying capacities than their steel-RC counterparts under both concentric and eccentric loadings. The ultimate capacities of GFRP-RC columns were 22% and 34% lower than their steel-RC counterparts at concentric and eccentric loadings, respectively. Also, the GFRP- and steel-RC columns exhibited similar modes of failure, which were mainly compression-controlled with concrete cover spalling and concrete crushing, under the different loading conditions. No rupture or buckling of longitudinal bars was observed. The contribution of GFRP bars to the ultimate column capacity under concentric loading, was found to be around 10.5%. Therefore, this study recommends that the contribution of GFRP bars to the ultimate capacities of RC columns should not be ignored.<br/></div> © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Glass},\n%keywords = {Tensile strength;Bars (metal);Fiber reinforced plastics;Concrete construction;Steel corrosion;Compressive strength;Reinforced concrete;Steel fibers;},\n%note = {Compression;Concentric loading;Eccentric loading;Fiber-reinforced polymers;Fibre reinforced polymers;Glass-fiber reinforced polymer bars;Glassfiber reinforced polymers (GFRP);RC column;Reinforced concrete column;Ultimate capacity;},\nURL = {http://dx.doi.org/10.1007/978-3-030-88166-5_73},\n} \n\n\n
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Fiber-reinforced polymer (FRP) bars offer several advantages over steel bars, including higher tensile strength, lighter weight, and non-corrosiveness. There is currently an increased use of FRP-reinforced concrete structures worldwide. However, due to the low compressive strength and modulus of FRP bars, current FRP design codes such as ACI 440.1R-15 and CSA S806-12, neglect the contribution of FRP bars to the ultimate compressive capacities of reinforced concrete columns. This study aims at investigating the feasibility of using glass FRP (GFRP) bars as internal reinforcement in concrete columns, subject to concentric and eccentric loading. A total of four 180 mm × 180 mm square RC columns with heights of 1000 mm and 1100 mm were tested, including two GFRP-RC columns and two steel-RC columns. One GFRP-RC column was tested under concentric loading, and the other was tested under eccentric loading at an eccentricity-to-width ratio of 44.4%. The two steel-RC columns were replicates of the two GFRP-RC columns, and served as control specimens. All columns were cast with normal strength concrete of 34 MPa compressive strength and had the same longitudinal reinforcement ratio of 2.48%. Steel ties of 10 mm diameter spaced at 180 mm were used as transverse reinforcements in all columns. The results showed that GFRP-RC columns had lower load-carrying capacities than their steel-RC counterparts under both concentric and eccentric loadings. The ultimate capacities of GFRP-RC columns were 22% and 34% lower than their steel-RC counterparts at concentric and eccentric loadings, respectively. Also, the GFRP- and steel-RC columns exhibited similar modes of failure, which were mainly compression-controlled with concrete cover spalling and concrete crushing, under the different loading conditions. No rupture or buckling of longitudinal bars was observed. The contribution of GFRP bars to the ultimate column capacity under concentric loading, was found to be around 10.5%. Therefore, this study recommends that the contribution of GFRP bars to the ultimate capacities of RC columns should not be ignored.
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Seismic energy dissipation in reinforced concrete beam: investigating damping formulations.\n \n \n \n \n\n\n \n Chambreuil, C.; Giry, C.; Ragueneau, F.; and Leger, P.\n\n\n \n\n\n\n European Journal of Environmental and Civil Engineering, 26(15): 7771 - 7797. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20215111330595 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic energy dissipation in reinforced concrete beam: investigating damping formulations},\njournal = {European Journal of Environmental and Civil Engineering},\nauthor = {Chambreuil, Clotilde and Giry, Cedric and Ragueneau, Frederic and Leger, Pierre},\nvolume = {26},\nnumber = {15},\nyear = {2022},\npages = {7771 - 7797},\nissn = {19648189},\nabstract = {<div data-language="eng" data-ev-field="abstract">Earthquake events in recent years and their consideration in performance-based design have led to the development of increasingly sophisticated physical models in structural computations. The aim of such models has been to predict the structural behaviour when excited by an earthquake. In particular, in the context of nuclear power plants (high-risk structures), operators must justify the airtightness of ageing structures to study the nonlinear behaviours of these structures, requiring the study and modelling of the phenomena associated with seismic energy dissipation in concrete. Energy dissipation has been described at two levels: global and local scales. At the local scale, material behaviour laws express some phenomena, such as concrete damage, friction, unilateral effects or plasticity. At the global scale, for dynamic analyses, energy dissipation has been practically modelled with equivalent viscous damping. Rayleigh-type damping formulations are still the most commonly used in engineering. Numerous formulations have been proposed in the literature, and some papers have compared some of these formulations. However, comparisons have rarely been based on experimental data, and the structures studied have varied considerably among studies. Therefore, the first objective of this paper is to assess the accuracy of a wide range of damping formulations by comparing them to the experimental data. Reinforced concrete beams were tested in quasistatic mode on a strong floor and in dynamic mode on a shaking table. The aim was to study the energy dissipation involving nonlinear mechanisms in concrete while steel rebar remained in their elastic range. The study developed in this paper concerns the dynamic behaviour of reinforced concrete critical structures, which are over-sized in engineering, under moderate earthquake levels. Thus, a beam multifibre model is proposed with two different concrete constitutive models. The second objective is to compare the energy dissipation at structural and material scales to evaluate the most efficient damping formulations to represent dynamic nonlinear responses.<br/></div> © 2021 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Energy dissipation},\n%keywords = {Concrete beams and girders;Damping;Earthquakes;Nuclear fuels;Nuclear power plants;Reinforced concrete;Risk assessment;Seismic design;},\n%note = {Beam;Earthquake events;Fiber element models;Global scale;Local scale;Performance based design;Physical modelling;Reinforced concrete beams;Seismic energy dissipation;Viscous damping;},\nURL = {http://dx.doi.org/10.1080/19648189.2021.2009380},\n} \n\n\n
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Earthquake events in recent years and their consideration in performance-based design have led to the development of increasingly sophisticated physical models in structural computations. The aim of such models has been to predict the structural behaviour when excited by an earthquake. In particular, in the context of nuclear power plants (high-risk structures), operators must justify the airtightness of ageing structures to study the nonlinear behaviours of these structures, requiring the study and modelling of the phenomena associated with seismic energy dissipation in concrete. Energy dissipation has been described at two levels: global and local scales. At the local scale, material behaviour laws express some phenomena, such as concrete damage, friction, unilateral effects or plasticity. At the global scale, for dynamic analyses, energy dissipation has been practically modelled with equivalent viscous damping. Rayleigh-type damping formulations are still the most commonly used in engineering. Numerous formulations have been proposed in the literature, and some papers have compared some of these formulations. However, comparisons have rarely been based on experimental data, and the structures studied have varied considerably among studies. Therefore, the first objective of this paper is to assess the accuracy of a wide range of damping formulations by comparing them to the experimental data. Reinforced concrete beams were tested in quasistatic mode on a strong floor and in dynamic mode on a shaking table. The aim was to study the energy dissipation involving nonlinear mechanisms in concrete while steel rebar remained in their elastic range. The study developed in this paper concerns the dynamic behaviour of reinforced concrete critical structures, which are over-sized in engineering, under moderate earthquake levels. Thus, a beam multifibre model is proposed with two different concrete constitutive models. The second objective is to compare the energy dissipation at structural and material scales to evaluate the most efficient damping formulations to represent dynamic nonlinear responses.
© 2021 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n Reconstructing groundwater storage variations from GRACE observations using a new Gaussian-Han-Fan (GHF) smoothing approach.\n \n \n \n \n\n\n \n Fatolazadeh, F.; and Goita, K.\n\n\n \n\n\n\n Journal of Hydrology, 604. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ReconstructingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20215011314480 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Reconstructing groundwater storage variations from GRACE observations using a new Gaussian-Han-Fan (GHF) smoothing approach},\njournal = {Journal of Hydrology},\nauthor = {Fatolazadeh, Farzam and Goita, Kalifa},\nvolume = {604},\nyear = {2022},\nissn = {00221694},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study focuses upon development of a new filter, referred to as Gaussian-Han-Fan (GHF) filtering, and its application within a comprehensive procedure for estimating groundwater changes. The Canadian Prairies was the study area. Variations in groundwater were estimated by using 15 years of Gravity Recovery And Climate Experiment (GRACE) twin-satellite observations (April 2002 to June 2017). Surface water storage (sum of soil moisture, snow water equivalent, canopy water, and surface water bodies) was subtracted from reconstructed GRACE-based Terrestrial Water Storage (TWS) changes through GHF filtering. To estimate the required hydrological parameters, both the Global Land Data Assimilation System (GLDAS) and Water Global Hydrology Model (WGHM) were used and evaluated. Water level changes for major surface water bodies were estimated using satellite altimetry-based products. The monthly average of GWS variations over the Prairies ranged between −200 mm and +230 mm. A positive trend was found for both TWS and GWS variations, with the highest values in the region surrounding Hudson Bay, particularly in northern Manitoba (about 55 mm/year). Estimated GWS anomalies error was equivalent to about 10% of its absolute value, with a mean of 19 mm. GWS variations results were validated using 116 active in-situ groundwater level measurements in five different river basins (Peace-Athabasca, Churchill, North Saskatchewan, South Saskatchewan, Missouri), which were all located in Alberta (Canada). Good agreement was achieved in each river basin (correlation > r = |0.70|, P < 10<sup>−4</sup>, RMSE < 55 mm). Regardless of hydrological system (GLDAS or WGHM), better statistical metrics were found when the average of the five basins was considered (r > |0.90|, P < 10<sup>−4</sup>), with lowest errors (RMSE or UnRMSE < 30 mm).<br/></div> © 2021 Elsevier B.V.},\nkey = {Groundwater},\n%keywords = {Soil moisture;Snow;Water levels;Surface waters;Gaussian distribution;Digital storage;Geodetic satellites;Watersheds;},\n%note = {Canadian prairie;Fan filter;Gaussian-han-fan filter;Gaussians;Gravity recovery and climate experiment satellites;Gravity recovery and climate experiments;Groundwater storage;Groundwater storage variation;Surface water body;Terrestrial water storage;},\nURL = {http://dx.doi.org/10.1016/j.jhydrol.2021.127234},\n} \n\n\n
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This study focuses upon development of a new filter, referred to as Gaussian-Han-Fan (GHF) filtering, and its application within a comprehensive procedure for estimating groundwater changes. The Canadian Prairies was the study area. Variations in groundwater were estimated by using 15 years of Gravity Recovery And Climate Experiment (GRACE) twin-satellite observations (April 2002 to June 2017). Surface water storage (sum of soil moisture, snow water equivalent, canopy water, and surface water bodies) was subtracted from reconstructed GRACE-based Terrestrial Water Storage (TWS) changes through GHF filtering. To estimate the required hydrological parameters, both the Global Land Data Assimilation System (GLDAS) and Water Global Hydrology Model (WGHM) were used and evaluated. Water level changes for major surface water bodies were estimated using satellite altimetry-based products. The monthly average of GWS variations over the Prairies ranged between −200 mm and +230 mm. A positive trend was found for both TWS and GWS variations, with the highest values in the region surrounding Hudson Bay, particularly in northern Manitoba (about 55 mm/year). Estimated GWS anomalies error was equivalent to about 10% of its absolute value, with a mean of 19 mm. GWS variations results were validated using 116 active in-situ groundwater level measurements in five different river basins (Peace-Athabasca, Churchill, North Saskatchewan, South Saskatchewan, Missouri), which were all located in Alberta (Canada). Good agreement was achieved in each river basin (correlation > r = |0.70|, P < 10−4, RMSE < 55 mm). Regardless of hydrological system (GLDAS or WGHM), better statistical metrics were found when the average of the five basins was considered (r > |0.90|, P < 10−4), with lowest errors (RMSE or UnRMSE < 30 mm).
© 2021 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Modelling the penetration of subsonic rigid projectile probes into granular materials using the cavity expansion theory.\n \n \n \n \n\n\n \n Alaei Varnosfaderani, M.; Maghoul, P.; and Wu, N.\n\n\n \n\n\n\n Computers and Geotechnics, 141. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ModellingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214811231354 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modelling the penetration of subsonic rigid projectile probes into granular materials using the cavity expansion theory},\njournal = {Computers and Geotechnics},\nauthor = {Alaei Varnosfaderani, Mahdi and Maghoul, Pooneh and Wu, Nan},\nvolume = {141},\nyear = {2022},\nissn = {0266352X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Typical subsurface investigation tools used on Earth are not applicable for subsurface exploration of the Moon and other extraterrestrial bodies due to payload limitations in space missions. Instead, light and compact subsonic projectile probes can be considered as an alternative subsurface investigation tool in such exploratory missions to overcome a host of challenges. Such probes can be launched from a lunar orbiter or lander to the surface of the Moon to provide the initial effective penetration from the impact. Here, we develop a model based on the spherical cavity expansion theory to predict the deceleration rate and final penetration depth of a rigid projectile probe into geological targets under the perpendicular subsonic impact. Two stress fields are assumed to propagate in the medium, plastic (near field) and elastic (far field), upon the impact. The stresses at the cavity wall are obtained by combining the Mohr–Coulomb failure criterion for the target failure (plastic region) considering two different assumptions for plastic wave propagation. Two field experiments are used to compare and assess the robustness of the proposed solutions in the subsonic range. Base on the simulation results and the experiments, it is concluded that the cavity expansion model considering the locked hydrostat assumption, with the modification here introduced for the volumetric strain, can provide us with a reasonable prediction of the projectile penetration, final penetration depth and the stresses on the probe. Thus, our proposed solution can be used as a benchmark for sophisticated and computationally-expensive numerical calculations.<br/></div> © 2021 Elsevier Ltd},\nkey = {Probes},\n%keywords = {Projectiles;Microgravity;Earth (planet);Wave propagation;Lunar missions;NASA;Granular materials;Expansion;Orbits;},\n%note = {Cavity expansion theory;Cavity expansions;Extraterrestrial bodies;Impact;Lunar regolith;Penetration;Projectile probe;Rigid projectile;Subsonics;Subsurface investigations;},\nURL = {http://dx.doi.org/10.1016/j.compgeo.2021.104546},\n} \n\n\n
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Typical subsurface investigation tools used on Earth are not applicable for subsurface exploration of the Moon and other extraterrestrial bodies due to payload limitations in space missions. Instead, light and compact subsonic projectile probes can be considered as an alternative subsurface investigation tool in such exploratory missions to overcome a host of challenges. Such probes can be launched from a lunar orbiter or lander to the surface of the Moon to provide the initial effective penetration from the impact. Here, we develop a model based on the spherical cavity expansion theory to predict the deceleration rate and final penetration depth of a rigid projectile probe into geological targets under the perpendicular subsonic impact. Two stress fields are assumed to propagate in the medium, plastic (near field) and elastic (far field), upon the impact. The stresses at the cavity wall are obtained by combining the Mohr–Coulomb failure criterion for the target failure (plastic region) considering two different assumptions for plastic wave propagation. Two field experiments are used to compare and assess the robustness of the proposed solutions in the subsonic range. Base on the simulation results and the experiments, it is concluded that the cavity expansion model considering the locked hydrostat assumption, with the modification here introduced for the volumetric strain, can provide us with a reasonable prediction of the projectile penetration, final penetration depth and the stresses on the probe. Thus, our proposed solution can be used as a benchmark for sophisticated and computationally-expensive numerical calculations.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Evaluating the importance of the embodied impacts of wall assemblies in the context of a low environmental impact energy mix.\n \n \n \n \n\n\n \n Lariviere-Lajoie, R.; Blanchet, P.; and Amor, B.\n\n\n \n\n\n\n Building and Environment, 207. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"EvaluatingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20214611149991 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evaluating the importance of the embodied impacts of wall assemblies in the context of a low environmental impact energy mix},\njournal = {Building and Environment},\nauthor = {Lariviere-Lajoie, Rosaline and Blanchet, Pierre and Amor, Ben},\nvolume = {207},\nyear = {2022},\nissn = {03601323},\nabstract = {<div data-language="eng" data-ev-field="abstract">In the context of a low environmental impact energy mix, the embodied energy of building materials can account for up to 46% of a building's life cycle energy over a 50-year service life. Fifty percent of this energy corresponds to the combination of the structure and building envelope. While most studies have compared different residential building systems or wall assemblies, this study aims to quantify the contribution of initial embodied impacts to the environmental impacts of wall assemblies' life cycle for the exterior walls of an office building in Quebec City (Canada). Cradle-to-grave life cycle assessments were conducted on eight wall assemblies, three of which use light-frame construction, one lightweight steel framing, two cross-laminated timber and two glued-laminated timber in a post and beam approach. The life cycle impacts were evaluated using openLCA, the ecoinvent database and the TRACI method. Energy consumption during the use stage was simulated using EnergyPlus. The results indicate that initial embodied impacts can account for 40% to 66% of all environmental impacts throughout the wall assemblies' life cycle. These results suggest that, in this specific context, the initial embodied impacts can become the dominant source of environmental impacts in wall assemblies' life cycle. Many factors have been identified as affecting initial embodied impacts such as the choice, the quantity and the nature of materials. The results of this study will help decision makers to identify where efforts should be made to reduce a building's environmental impacts in similar context.<br/></div> © 2021 Elsevier Ltd},\nkey = {Environmental impact},\n%keywords = {Energy utilization;Laminating;Global warming;Timber;Life cycle;Decision making;Office buildings;Walls (structural partitions);},\n%note = {Building life cycle;Buildings materials;Commercial building;Embodied energy;Energy mix;Impact energy;Life cycle energies;Renewable energies;Wall assembly;Wood-based structure;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2021.108534},\n} \n\n\n
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In the context of a low environmental impact energy mix, the embodied energy of building materials can account for up to 46% of a building's life cycle energy over a 50-year service life. Fifty percent of this energy corresponds to the combination of the structure and building envelope. While most studies have compared different residential building systems or wall assemblies, this study aims to quantify the contribution of initial embodied impacts to the environmental impacts of wall assemblies' life cycle for the exterior walls of an office building in Quebec City (Canada). Cradle-to-grave life cycle assessments were conducted on eight wall assemblies, three of which use light-frame construction, one lightweight steel framing, two cross-laminated timber and two glued-laminated timber in a post and beam approach. The life cycle impacts were evaluated using openLCA, the ecoinvent database and the TRACI method. Energy consumption during the use stage was simulated using EnergyPlus. The results indicate that initial embodied impacts can account for 40% to 66% of all environmental impacts throughout the wall assemblies' life cycle. These results suggest that, in this specific context, the initial embodied impacts can become the dominant source of environmental impacts in wall assemblies' life cycle. Many factors have been identified as affecting initial embodied impacts such as the choice, the quantity and the nature of materials. The results of this study will help decision makers to identify where efforts should be made to reduce a building's environmental impacts in similar context.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Developing a New Understanding of the Impulse Response Test for Defect Detection in Concrete Plates.\n \n \n \n \n\n\n \n Sajid, S.; Chouinard, L.; and Taras, A.\n\n\n \n\n\n\n Journal of Engineering Mechanics, 148(1). 2022.\n \n\n\n\n
\n\n\n\n \n \n \"DevelopingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214411104008 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Developing a New Understanding of the Impulse Response Test for Defect Detection in Concrete Plates},\njournal = {Journal of Engineering Mechanics},\nauthor = {Sajid, Sikandar and Chouinard, Luc and Taras, Andre},\nvolume = {148},\nnumber = {1},\nyear = {2022},\nissn = {07339399},\nabstract = {<div data-language="eng" data-ev-field="abstract">The objective of this research is to develop a technical basis of the impulse-response test for condition assessment and to improve its diagnostics for concrete plates. Impulse-response tests were performed on a fully supported concrete plate with artificial delaminations of various planar sizes at different depths. Defect detection was first performed using the empirical damage indices defined in ASTM C1740, which are based on the shape characteristics of the frequency response function (FRF) between 10 and 800 Hz. Next, the test procedure was modified for extending the frequency range of FRF, revealing that delaminations introduce vibration modes with distinctive high frequencies not present in intact portions of the plate and not detectable in the currently used frequency range of the test due to the hammer tip typically used. A validated 3D finite element model of the experimental plate is used to correlate the dynamic response of test points with experimental FRFs, indicating that the distinctive high frequencies in the extended FRF measured on delaminations correspond to the first bending mode characterized by a local reduction in flexural rigidity and in the damping of the plate. The effect of experimental setups, such as the relative distance between the sensor and the hammer, is shown to have a significant effect on the accuracy of defect delineation for large and shallow delaminations. A new damage index based on the resonant frequency from the extended FRF with a modified experimental setup is proposed for estimating the planar size and depth of delaminations. The performance of the proposed index is demonstrated through experimental data as well as parametric numerical simulations. Multiple regression is used to estimate the detectability, depth, and extent of delaminations as a function of the proposed and currently used damage indices. The resonant frequency is found to be more informative for the planar size of the delamination compared to the depth, while the average accelerance is more informative for the depth of delamination and less for its planar size. Furthermore, the results indicate that the test may have limited detectability and application for delaminations deeper than 300 mm. Finally, the prediction accuracy for the depth and size of delamination is demonstrated based on Gaussian processes and is presented in the form of confidence ellipses. The prediction model is shown to be reasonably accurate for shallow defects (<300 mm), which are the most critical for durability and structural performance. While the impulse-response test has been used since the early 1990s for condition assessment of concrete elements other than drilled shaft piles, this study is among the most comprehensive on its physical basis, the influence of experimental setups, the extension of the frequency range, the characterization of delaminations, and detection limitations of the test.<br/></div> © 2021 American Society of Civil Engineers.},\nkey = {Impulse response},\n%keywords = {Defects;Concrete testing;Concretes;Natural frequencies;Wave propagation;Damage detection;Frequency response;Hammers;Plates (structural components);Vibrations (mechanical);Nondestructive examination;},\n%note = {Concrete plates;Damage index;Defect detection;Defect localizations;Frequency ranges;Frequency response functions;Impulse-response test;Mobility spectra;Planar size;Stress wave propagation;},\nURL = {http://dx.doi.org/10.1061/(ASCE)EM.1943-7889.0002036},\n} \n\n\n
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The objective of this research is to develop a technical basis of the impulse-response test for condition assessment and to improve its diagnostics for concrete plates. Impulse-response tests were performed on a fully supported concrete plate with artificial delaminations of various planar sizes at different depths. Defect detection was first performed using the empirical damage indices defined in ASTM C1740, which are based on the shape characteristics of the frequency response function (FRF) between 10 and 800 Hz. Next, the test procedure was modified for extending the frequency range of FRF, revealing that delaminations introduce vibration modes with distinctive high frequencies not present in intact portions of the plate and not detectable in the currently used frequency range of the test due to the hammer tip typically used. A validated 3D finite element model of the experimental plate is used to correlate the dynamic response of test points with experimental FRFs, indicating that the distinctive high frequencies in the extended FRF measured on delaminations correspond to the first bending mode characterized by a local reduction in flexural rigidity and in the damping of the plate. The effect of experimental setups, such as the relative distance between the sensor and the hammer, is shown to have a significant effect on the accuracy of defect delineation for large and shallow delaminations. A new damage index based on the resonant frequency from the extended FRF with a modified experimental setup is proposed for estimating the planar size and depth of delaminations. The performance of the proposed index is demonstrated through experimental data as well as parametric numerical simulations. Multiple regression is used to estimate the detectability, depth, and extent of delaminations as a function of the proposed and currently used damage indices. The resonant frequency is found to be more informative for the planar size of the delamination compared to the depth, while the average accelerance is more informative for the depth of delamination and less for its planar size. Furthermore, the results indicate that the test may have limited detectability and application for delaminations deeper than 300 mm. Finally, the prediction accuracy for the depth and size of delamination is demonstrated based on Gaussian processes and is presented in the form of confidence ellipses. The prediction model is shown to be reasonably accurate for shallow defects (<300 mm), which are the most critical for durability and structural performance. While the impulse-response test has been used since the early 1990s for condition assessment of concrete elements other than drilled shaft piles, this study is among the most comprehensive on its physical basis, the influence of experimental setups, the extension of the frequency range, the characterization of delaminations, and detection limitations of the test.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Three-dimensional biomechanical modeling of cylindrical bone-like porous materials subject to acoustic waves.\n \n \n \n \n\n\n \n Hodaei, M.; Maghoul, P.; and Wu, N.\n\n\n \n\n\n\n International Journal of Mechanical Sciences, 213. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"Three-dimensionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214311082005 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Three-dimensional biomechanical modeling of cylindrical bone-like porous materials subject to acoustic waves},\njournal = {International Journal of Mechanical Sciences},\nauthor = {Hodaei, M. and Maghoul, P. and Wu, N.},\nvolume = {213},\nyear = {2022},\nissn = {00207403},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper describes a three-dimensional (3D) analytical solution for the acoustic response of cancellous bone-like porous materials saturated with a viscous fluid. The effect of dynamic tortuosity, especially in clinically relevant ultrasound frequency ranges, is considered to investigate the effect of viscous interaction between the fluid and solid phases. The solution includes the effects of both fast and slow longitudinal waves as well as transverse waves propagating through the medium. The scattering operators and radial displacements are derived in terms of ultrasonic waveforms by applying the Helmholtz decomposition. The effect of different porosities, wall thickness ratios, and frequencies of incident waves on the radial displacement and scattering operators are investigated by considering various incident wave angles at forward and sideward directions. The results demonstrate that the incident wave angle has a significant effect on the radial displacement and scattering operators regardless of the porosity, wall thickness ratio, and viscosity of pore fluid. Furthermore, the distribution pattern of the radial displacement and scattering operators in relatively low frequency ranges is almost symmetric while asymmetric in relatively high frequency ranges. It is shown that the bone characterization using ultrasonic techniques is not only based on the mineral density, as used currently by electromagnetic wave-based tools, but also other biomechanical factors such as the porosity, viscosity of pore fluid, and wall thickness ratio of a cancellous bone structure. Also, the pattern of the reflected pressure can be an indicator of the state of a cancellous bone (healthy versus osteoporosis).<br/></div> © 2021 Elsevier Ltd},\nkey = {Porosity},\n%keywords = {Acoustic waves;Porous materials;Bone;Pore fluids;Viscosity;Forward scattering;Nondestructive examination;Acoustic wave scattering;Electromagnetic waves;Ultrasonic testing;},\n%note = {Acoustics waves;Cancellous bone;Characterization;Complex medium;Dynamic tortuosities;Poro-mechanics;Radial displacements;Radial scattering;Scattering operators;Wall thickness ratios;},\nURL = {http://dx.doi.org/10.1016/j.ijmecsci.2021.106835},\n} \n\n\n
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This paper describes a three-dimensional (3D) analytical solution for the acoustic response of cancellous bone-like porous materials saturated with a viscous fluid. The effect of dynamic tortuosity, especially in clinically relevant ultrasound frequency ranges, is considered to investigate the effect of viscous interaction between the fluid and solid phases. The solution includes the effects of both fast and slow longitudinal waves as well as transverse waves propagating through the medium. The scattering operators and radial displacements are derived in terms of ultrasonic waveforms by applying the Helmholtz decomposition. The effect of different porosities, wall thickness ratios, and frequencies of incident waves on the radial displacement and scattering operators are investigated by considering various incident wave angles at forward and sideward directions. The results demonstrate that the incident wave angle has a significant effect on the radial displacement and scattering operators regardless of the porosity, wall thickness ratio, and viscosity of pore fluid. Furthermore, the distribution pattern of the radial displacement and scattering operators in relatively low frequency ranges is almost symmetric while asymmetric in relatively high frequency ranges. It is shown that the bone characterization using ultrasonic techniques is not only based on the mineral density, as used currently by electromagnetic wave-based tools, but also other biomechanical factors such as the porosity, viscosity of pore fluid, and wall thickness ratio of a cancellous bone structure. Also, the pattern of the reflected pressure can be an indicator of the state of a cancellous bone (healthy versus osteoporosis).
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Comparative assessment of alternative water supply contributions across five data-scarce cities.\n \n \n \n \n\n\n \n Sunik, J.; Jussah, O.; Orabi, M. O. M.; Abubakar, M. C.; Quansah, R. F.; Yahaya, W.; Adonadaga, J. A.; Cossa, C.; Ferrato, J.; Cossa, C. A.; Hadi, W.; Yuniarto, A.; Marsono, B. D.; Purnomo, A.; Bichai, F.; and Zevenbergen, C.\n\n\n \n\n\n\n International Journal of Water Resources Development, 38(6): 985 - 1008. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"ComparativePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213710878778 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Comparative assessment of alternative water supply contributions across five data-scarce cities},\njournal = {International Journal of Water Resources Development},\nauthor = {Sunik, Janez and Jussah, Osman and Orabi, Mohamed O. M. and Abubakar, Muhammed C. and Quansah, Richmond F. and Yahaya, Wahid and Adonadaga, Justin A. and Cossa, Carlos and Ferrato, Jose and Cossa, Castigo A. and Hadi, Wahyono and Yuniarto, Adhi and Marsono, Bowo Djoko and Purnomo, Alfan and Bichai, Franoise and Zevenbergen, Chris},\nvolume = {38},\nnumber = {6},\nyear = {2022},\npages = {985 - 1008},\nissn = {07900627},\nabstract = {<div data-language="eng" data-ev-field="abstract">Alternative water sources offer opportunities to contribute to the water supply to meet non-potable urban demand, closing water supply–demand gaps. Detailed assessments of these schemes are often data intensive, which can be a barrier in resource-scarce locations. A data-light approach is proposed and applied to assess the potential contribution of alternative water sources in five cities in the Global South, and to identify barriers preventing their widespread uptake. These barriers include perception, space, cost, home ownership and capacity constraints. This approach is applicable elsewhere, supporting assessment for city water planners/managers for preliminary planning to promote discussion on alternative sources to water security.<br/></div> © 2021 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Water supply},\n%keywords = {Potable water;Wastewater reclamation;Wastewater treatment;Water conservation;},\n%note = {Alternative water sources;Alternative water supply source;Alternative waters;Comparative assessment;Global south;Rainwater;Stormwaters;Treated wastewater reuse;Water supply sources;Water-supply demand;},\nURL = {http://dx.doi.org/10.1080/07900627.2021.1964449},\n} \n\n\n
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Alternative water sources offer opportunities to contribute to the water supply to meet non-potable urban demand, closing water supply–demand gaps. Detailed assessments of these schemes are often data intensive, which can be a barrier in resource-scarce locations. A data-light approach is proposed and applied to assess the potential contribution of alternative water sources in five cities in the Global South, and to identify barriers preventing their widespread uptake. These barriers include perception, space, cost, home ownership and capacity constraints. This approach is applicable elsewhere, supporting assessment for city water planners/managers for preliminary planning to promote discussion on alternative sources to water security.
© 2021 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n Seismic Response of Alluvial Valleys Subject to Oblique Incidence of Shear Waves.\n \n \n \n \n\n\n \n Amini, D.; Gatmiri, B.; and Maghoul, P.\n\n\n \n\n\n\n Journal of Earthquake Engineering, 26(12): 6304 - 6328. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212210420105 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Response of Alluvial Valleys Subject to Oblique Incidence of Shear Waves},\njournal = {Journal of Earthquake Engineering},\nauthor = {Amini, Dana and Gatmiri, Behrouz and Maghoul, Pooneh},\nvolume = {26},\nnumber = {12},\nyear = {2022},\npages = {6304 - 6328},\nissn = {13632469},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper aims to study the combined effects of incident wave angularity and geometrical characteristics on the seismic spectral response of curved valleys filled with alluvium. The parametric studies were carried out using a numerical tool, called HYBRID, which combines the Finite Element Method (FEM) and Boundary Element Method (BEM) to model the near field and far field, respectively. Some criteria were provided considering the coupled effects of wave incident angles, and topographical and geometrical characteristics on the seismic site response. This will help engineers in assessing the soil-structure interaction problems in alluvial valleys.<br/></div> © 2021 Taylor & Francis Group, LLC.},\nkey = {Boundary element method},\n%keywords = {Soil structure interactions;Shear flow;Sailing vessels;Landforms;Shear waves;Numerical methods;Finite element method;Seismology;},\n%note = {Alluvial valleys;Combined effect;Geometrical characteristics;Incident angles;Numerical tools;Oblique incidence;Parametric study;Spectral response;},\nURL = {http://dx.doi.org/10.1080/13632469.2021.1913457},\n} \n\n\n
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This paper aims to study the combined effects of incident wave angularity and geometrical characteristics on the seismic spectral response of curved valleys filled with alluvium. The parametric studies were carried out using a numerical tool, called HYBRID, which combines the Finite Element Method (FEM) and Boundary Element Method (BEM) to model the near field and far field, respectively. Some criteria were provided considering the coupled effects of wave incident angles, and topographical and geometrical characteristics on the seismic site response. This will help engineers in assessing the soil-structure interaction problems in alluvial valleys.
© 2021 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n Optimal Performance-Based Configurations of Stiffness and Strength Centers in Multi-Story Wall-Frame Asymmetric Buildings Including Soil–Structure Interaction Effects.\n \n \n \n \n\n\n \n Mohammadzadeh Osalu, S.; Shakib, H.; and McClure, G.\n\n\n \n\n\n\n Journal of Earthquake Engineering, 26(11): 5978 - 6014. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"OptimalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212110407774 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Optimal Performance-Based Configurations of Stiffness and Strength Centers in Multi-Story Wall-Frame Asymmetric Buildings Including Soil–Structure Interaction Effects},\njournal = {Journal of Earthquake Engineering},\nauthor = {Mohammadzadeh Osalu, Sahar and Shakib, Hamzeh and McClure, Ghyslaine},\nvolume = {26},\nnumber = {11},\nyear = {2022},\npages = {5978 - 6014},\nissn = {13632469},\nabstract = {<div data-language="eng" data-ev-field="abstract">In this paper, the probabilistic performance-based approach is adopted to evaluate the seismic performance of multi-story reinforced concrete wall-frame asymmetric buildings considering soil–structure interaction (SSI) and identify appropriate stiffness and strength centers configurations. A group of fixed- and flexible-base models with different stiffness and strength eccentricities were considered for parametric studies, and their seismic performance was compared in three different limit states. The optimum configuration of centers was found to be a function of base condition and performance objective. The proposed configurations can be adopted in the performance-based design of asymmetric buildings. Furthermore, the results indicate a detrimental effect of SSI in the Life Safety and Collapse Prevention limit states.<br/></div> © 2021 Taylor & Francis Group, LLC.},\nkey = {Stiffness},\n%keywords = {Seismology;Seismic design;Walls (structural partitions);Reinforced concrete;Seismic waves;Soils;},\n%note = {Asymmetric buildings;Optimal performance;Optimum configurations;Performance based approach;Performance based design;Performance objective;Reinforced concrete wall;Seismic Performance;},\nURL = {http://dx.doi.org/10.1080/13632469.2021.1911881},\n} \n\n\n
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In this paper, the probabilistic performance-based approach is adopted to evaluate the seismic performance of multi-story reinforced concrete wall-frame asymmetric buildings considering soil–structure interaction (SSI) and identify appropriate stiffness and strength centers configurations. A group of fixed- and flexible-base models with different stiffness and strength eccentricities were considered for parametric studies, and their seismic performance was compared in three different limit states. The optimum configuration of centers was found to be a function of base condition and performance objective. The proposed configurations can be adopted in the performance-based design of asymmetric buildings. Furthermore, the results indicate a detrimental effect of SSI in the Life Safety and Collapse Prevention limit states.
© 2021 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n Seismic response analysis of face slabs in concrete face rockfill dams.\n \n \n \n \n\n\n \n Saberi, M.; Annan, C.; and Konrad, J. M.\n\n\n \n\n\n\n Journal of Earthquake Engineering, 26(1): 192 - 220. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20195107864577 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic response analysis of face slabs in concrete face rockfill dams},\njournal = {Journal of Earthquake Engineering},\nauthor = {Saberi, Miad and Annan, Charles-Darwin and Konrad, Jean Marie},\nvolume = {26},\nnumber = {1},\nyear = {2022},\npages = {192 - 220},\nissn = {13632469},\nabstract = {<div data-language="eng" data-ev-field="abstract">The seismic behavior of the concrete slab in concrete-faced rockfill dams (CFRD) is investigated, considering concrete slab-cushion layer interface effect. The interface is simulated by an advanced constitutive model capable of simulating the complex behavior of soil–structure interfaces such as particle breakage, stress-dilatancy, stress-hardening, cyclic accumulative contraction, and stress degradation. Stage construction and reservoir impoundment of the dam are simulated and the dam is subjected to two earthquake records. The concrete slab responses under static and dynamic conditions are examined, and the effects of reservoir water level, interface roughness, and the interface modeling approach on the concrete slab response are investigated.<br/></div> © 2019 Taylor & Francis Group, LLC.},\nkey = {Concrete slabs},\n%keywords = {Reservoirs (water);Motion analysis;Seismic response;Earthquakes;Water levels;Dams;Rock mechanics;},\n%note = {Concrete faced rockfill dam;Earthquake ground motions;Face slab;Interface roughness;Static response;},\nURL = {http://dx.doi.org/10.1080/13632469.2019.1666756},\n} \n\n\n
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The seismic behavior of the concrete slab in concrete-faced rockfill dams (CFRD) is investigated, considering concrete slab-cushion layer interface effect. The interface is simulated by an advanced constitutive model capable of simulating the complex behavior of soil–structure interfaces such as particle breakage, stress-dilatancy, stress-hardening, cyclic accumulative contraction, and stress degradation. Stage construction and reservoir impoundment of the dam are simulated and the dam is subjected to two earthquake records. The concrete slab responses under static and dynamic conditions are examined, and the effects of reservoir water level, interface roughness, and the interface modeling approach on the concrete slab response are investigated.
© 2019 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n First-Order Seismic Loss Assessment at Urban Scale: A Case Study of Skopje, North Macedonia.\n \n \n \n \n\n\n \n Mircevska, V.; Abo-El-Ezz, A.; Gjorgjeska, I.; Smirnoff, A.; and Nastev, M.\n\n\n \n\n\n\n Journal of Earthquake Engineering, 26(1): 70 - 88. 2022.\n \n\n\n\n
\n\n\n\n \n \n \"First-OrderPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20194307587375 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {First-Order Seismic Loss Assessment at Urban Scale: A Case Study of Skopje, North Macedonia},\njournal = {Journal of Earthquake Engineering},\nauthor = {Mircevska, Violeta and Abo-El-Ezz, Ahmad and Gjorgjeska, Irena and Smirnoff, Alex and Nastev, Miroslav},\nvolume = {26},\nnumber = {1},\nyear = {2022},\npages = {70 - 88},\nissn = {13632469},\nabstract = {<div data-language="eng" data-ev-field="abstract">Relatively simple method for seismic loss assessment is presented based on probabilistic hazard, event scenarios and local building inventory. EMS98-dependent vulnerability model is transformed to continuous fragility functions correlating damage probability to peak ground acceleration. The proposed method illustrated over 59,950 inventoried buildings and evaluated with replacement cost of $25.5B. For a repeat of the M6.1 1963 earthquake, simulations predict immediate losses of about $6.8B and 1,908 red-tagged buildings, compared to about $5B and 15,800 red-tagged building at the time. Average losses from probabilistic scenarios range from $1.6B (return period of 100y) to $17.8B (10,000y).<br/></div> © 2019 Taylor & Francis Group, LLC.},\nkey = {Buildings},\n%keywords = {Seismology;Damage detection;Hazards;Losses;},\n%note = {Building inventory;Damage state;Economic loss;Fragility function;Seismic hazards;},\nURL = {http://dx.doi.org/10.1080/13632469.2019.1662342},\n} \n\n\n
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Relatively simple method for seismic loss assessment is presented based on probabilistic hazard, event scenarios and local building inventory. EMS98-dependent vulnerability model is transformed to continuous fragility functions correlating damage probability to peak ground acceleration. The proposed method illustrated over 59,950 inventoried buildings and evaluated with replacement cost of $25.5B. For a repeat of the M6.1 1963 earthquake, simulations predict immediate losses of about $6.8B and 1,908 red-tagged buildings, compared to about $5B and 15,800 red-tagged building at the time. Average losses from probabilistic scenarios range from $1.6B (return period of 100y) to $17.8B (10,000y).
© 2019 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n Evidential data fusion for characterization of pavement surface conditions during winter using a multi‐sensor approach.\n \n \n \n \n\n\n \n Diaby, I.; Germain, M.; and Goita, K.\n\n\n \n\n\n\n Sensors, 21(24). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EvidentialPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n  \n \n 1 download\n \n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20215011309534 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evidential data fusion for characterization of pavement surface conditions during winter using a multi‐sensor approach},\njournal = {Sensors},\nauthor = {Diaby, Issiaka and Germain, Mickael and Goita, Kalifa},\nvolume = {21},\nnumber = {24},\nyear = {2021},\nissn = {14248220},\nabstract = {<div data-language="eng" data-ev-field="abstract">The role of a service that is dedicated to road weather analysis is to issue forecasts and warnings to users regarding roadway conditions, thereby making it possible to anticipate dangerous traffic conditions, especially during the winter period. It is important to define pavement conditions at all times. In this paper, a new data acquisition approach is proposed that is based upon the analysis and combination of two sensors in real time by nanocomputer. The first sensor is a camera that records images and videos of the road network. The second sensor is a microphone that records the tire–pavement interaction, to characterize each surface’s condition. The two low‐cost sensors were fed to different deep learning architectures that are specialized in surface state analysis; the results were combined using an evidential theory‐based data fusion approach. This study is a proof of concept, to test an evidential approach for improving classification with deep learning, applied to only two sensors; however, one could very well add more sensors and make the nanocomputers communicate together, to analyze a larger urban environment.<br/></div> © 2021 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Intelligent systems},\n%keywords = {Pavements;Deep learning;Sensor data fusion;Data acquisition;Learning systems;Intelligent vehicle highway systems;},\n%note = {Condition;Deep learning;Multi sensor;Multi-sensor systems;Nano-computers;Pavement condition;Pavement surface conditions;Real- time;Traffic conditions;Weather analysis;},\nURL = {http://dx.doi.org/10.3390/s21248218},\n} \n\n\n
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The role of a service that is dedicated to road weather analysis is to issue forecasts and warnings to users regarding roadway conditions, thereby making it possible to anticipate dangerous traffic conditions, especially during the winter period. It is important to define pavement conditions at all times. In this paper, a new data acquisition approach is proposed that is based upon the analysis and combination of two sensors in real time by nanocomputer. The first sensor is a camera that records images and videos of the road network. The second sensor is a microphone that records the tire–pavement interaction, to characterize each surface’s condition. The two low‐cost sensors were fed to different deep learning architectures that are specialized in surface state analysis; the results were combined using an evidential theory‐based data fusion approach. This study is a proof of concept, to test an evidential approach for improving classification with deep learning, applied to only two sensors; however, one could very well add more sensors and make the nanocomputers communicate together, to analyze a larger urban environment.
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Regional environmental life cycle consequences of material substitutions: The case of increasing wood structures for non-residential buildings.\n \n \n \n \n\n\n \n Cordier, S.; Robichaud, F.; Blanchet, P.; and Amor, B.\n\n\n \n\n\n\n Journal of Cleaner Production, 328. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"RegionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214611155313 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Regional environmental life cycle consequences of material substitutions: The case of increasing wood structures for non-residential buildings},\njournal = {Journal of Cleaner Production},\nauthor = {Cordier, Sylvain and Robichaud, Francois and Blanchet, Pierre and Amor, Ben},\nvolume = {328},\nyear = {2021},\nissn = {09596526},\nabstract = {<div data-language="eng" data-ev-field="abstract">Several studies have shown the benefits of using timber in the construction sector in terms of climate change, which has received the support of decision-makers. However, few studies focus on other environmental indicators. The environmental impacts (i.e., such as human health, ecosystem quality, and resources) of material substitutions, consequence of the increasing use of wood, are still lacking in the literature. Studies that compare different structural materials focus either on a single building or on one structural system that would be representative on a larger scale. However, the environmental benefits of some projects are not easily extrapolated to the scale of a given region with a variety of architectures. Higher-order effects, beyond the building scale, can indeed imply changes in the resource availability according to the unconstrained suppliers and resources. The objective of this paper is to assess the life cycle environmental consequences of wood substitutions at a regional scale for the non-residential construction sector. The increasing use of wood structures for non-residential buildings in the province of Quebec (Canada) is used as a case study. The method includes the development of material substitution factors by comparing several structures. The substitution factors show that, on average, wood can replace, simultaneously, 0.59 and 4.54 times the weight of steel and concrete, respectively. However, steel substitution has more advantages than concrete substitution. Among the tested parameters, the variability of the material substitution factors implies more uncertainties in the results. The originality of our study lies in the limitations that may change the conclusions drawn from the substitution at a large scale. With three substitution scenarios for four impact categories, the results showed an advantage of using wood in seven of the twelve combinations. The ecosystem quality indicator is the most unfavorable and shows opposite trends to climate change, human health, and resource indicators. Considering average material substitution factors combined with the maximum potential use of wood in non-residential (NR) structures in Quebec in 2050, wood can contribute to avoid 2.6 Mt of carbon dioxide equivalent (CO<inf>2</inf> eq.). This amount is equivalent to 3.5% of Quebec's CO<inf>2</inf> eq. emission reduction target by 2050 compared to 1990.<br/></div> © 2021},\nkey = {Carbon dioxide},\n%keywords = {Ecosystems;Wooden buildings;Construction industry;Emission control;Wood;Climate change;Housing;Concretes;Decision making;Life cycle;},\n%note = {Building environment;Consequential life-cycle assessment;Construction sectors;Human health;Large-scales;Materials substitutions;Residential building;Substitution factor;Wood structure;Wooden structure;},\nURL = {http://dx.doi.org/10.1016/j.jclepro.2021.129671},\n} \n\n\n
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Several studies have shown the benefits of using timber in the construction sector in terms of climate change, which has received the support of decision-makers. However, few studies focus on other environmental indicators. The environmental impacts (i.e., such as human health, ecosystem quality, and resources) of material substitutions, consequence of the increasing use of wood, are still lacking in the literature. Studies that compare different structural materials focus either on a single building or on one structural system that would be representative on a larger scale. However, the environmental benefits of some projects are not easily extrapolated to the scale of a given region with a variety of architectures. Higher-order effects, beyond the building scale, can indeed imply changes in the resource availability according to the unconstrained suppliers and resources. The objective of this paper is to assess the life cycle environmental consequences of wood substitutions at a regional scale for the non-residential construction sector. The increasing use of wood structures for non-residential buildings in the province of Quebec (Canada) is used as a case study. The method includes the development of material substitution factors by comparing several structures. The substitution factors show that, on average, wood can replace, simultaneously, 0.59 and 4.54 times the weight of steel and concrete, respectively. However, steel substitution has more advantages than concrete substitution. Among the tested parameters, the variability of the material substitution factors implies more uncertainties in the results. The originality of our study lies in the limitations that may change the conclusions drawn from the substitution at a large scale. With three substitution scenarios for four impact categories, the results showed an advantage of using wood in seven of the twelve combinations. The ecosystem quality indicator is the most unfavorable and shows opposite trends to climate change, human health, and resource indicators. Considering average material substitution factors combined with the maximum potential use of wood in non-residential (NR) structures in Quebec in 2050, wood can contribute to avoid 2.6 Mt of carbon dioxide equivalent (CO2 eq.). This amount is equivalent to 3.5% of Quebec's CO2 eq. emission reduction target by 2050 compared to 1990.
© 2021\n
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\n \n\n \n \n \n \n \n \n Monotonic and cyclic stress-strain models for confined concrete-masonry shear wall boundary elements.\n \n \n \n \n\n\n \n AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 249. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"MonotonicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214411091282 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Monotonic and cyclic stress-strain models for confined concrete-masonry shear wall boundary elements},\njournal = {Engineering Structures},\nauthor = {AbdelRahman, Belal and Galal, Khaled},\nvolume = {249},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Simulation of the seismic response of fully grouted reinforced masonry shear walls (RMSWs) built with reinforced masonry boundary elements (RMBEs) necessitates reliable nonlinear models of their RMBEs. The axial monotonic and cyclic full stress-strain curves of RMBEs are essential for predicting the lateral cyclic response of RMSWs with boundary elements. Therefore, a reliable stress-strain constitutive model for the axial monotonic and cyclic behavior of RMBEs is required. The authors recently investigated the axial monotonic compressive behavior of unconfined and confined RMBEs built with different section configurations, vertical reinforcement arrangements, transverse confinement ratios, and different construction procedures. In the current study, the authors investigated the cyclic behavior of some RMBEs whose counterparts were previously tested under axial monotonic compression. In addition, more specimens with different confinement configurations and different grout strengths were tested. Comparisons of the test results showed that increasing the vertical reinforcement ratio increased the axial load carrying capacity of the tested RMBEs but decreased their strain ductility. In addition, using a low compressive strength grout significantly reduced the strain ductility of the RMBEs. Moreover, monotonic and cyclic stress-strain models for confined and unconfined concrete-masonry boundary elements subjected to axial compression loading were developed. The proposed models showed good-to-excellent agreement with the experimental results, predicting the stress-strain rising curve, stress drop, and postpeak behavior. Furthermore, unloading and reloading curves, strength degradations, and softening of reversal and reloading branches due to cyclic degradations were well captured by the proposed model.<br/></div> © 2021 Elsevier Ltd},\nkey = {Ductility},\n%keywords = {Reinforcement;Unloading;Stress-strain curves;Concrete construction;Grouting;Shear walls;Compressive strength;Mortar;},\n%note = {Boundary elements;Concrete masonry;Confinement;Cyclic behavior;Cyclic stress-strain;Masonry shear walls;Monotonic response;Monotonics;Reinforced masonry;Stress-strain model;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.113343},\n} \n\n\n
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Simulation of the seismic response of fully grouted reinforced masonry shear walls (RMSWs) built with reinforced masonry boundary elements (RMBEs) necessitates reliable nonlinear models of their RMBEs. The axial monotonic and cyclic full stress-strain curves of RMBEs are essential for predicting the lateral cyclic response of RMSWs with boundary elements. Therefore, a reliable stress-strain constitutive model for the axial monotonic and cyclic behavior of RMBEs is required. The authors recently investigated the axial monotonic compressive behavior of unconfined and confined RMBEs built with different section configurations, vertical reinforcement arrangements, transverse confinement ratios, and different construction procedures. In the current study, the authors investigated the cyclic behavior of some RMBEs whose counterparts were previously tested under axial monotonic compression. In addition, more specimens with different confinement configurations and different grout strengths were tested. Comparisons of the test results showed that increasing the vertical reinforcement ratio increased the axial load carrying capacity of the tested RMBEs but decreased their strain ductility. In addition, using a low compressive strength grout significantly reduced the strain ductility of the RMBEs. Moreover, monotonic and cyclic stress-strain models for confined and unconfined concrete-masonry boundary elements subjected to axial compression loading were developed. The proposed models showed good-to-excellent agreement with the experimental results, predicting the stress-strain rising curve, stress drop, and postpeak behavior. Furthermore, unloading and reloading curves, strength degradations, and softening of reversal and reloading branches due to cyclic degradations were well captured by the proposed model.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Cfd-dem modeling of dense sub-aerial and submerged granular collapses.\n \n \n \n \n\n\n \n Shademani, M.; Blais, B.; and Shakibaeinia, A.\n\n\n \n\n\n\n Water (Switzerland), 13(21). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"Cfd-demPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214311084581 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Cfd-dem modeling of dense sub-aerial and submerged granular collapses},\njournal = {Water (Switzerland)},\nauthor = {Shademani, Maryam and Blais, Bruno and Shakibaeinia, Ahmad},\nvolume = {13},\nnumber = {21},\nyear = {2021},\nissn = {20734441},\nabstract = {<div data-language="eng" data-ev-field="abstract">Sub-aerial (dry) and submerged dense granular collapses are studied by means of a threephase unresolved computational fluid dynamics-discrete element method (CFD-DEM) numerical model. Physical experiments are also performed to provide data for validation and further analysis. Validations show good compatibility between the numerical and experimental results. Collapse mechanism as well as post-collapse morphological parameters, such as granular surface profile and runout distance, are analyzed. The spatiotemporal variation of solid volume fraction is also investigated. The effect granular column aspect ratio is studied and found to be a key factor in granular morphology for both submerged and dry conditions. The volume fraction analysis evolution shows an expansion and re-compaction trend, correlated with the granular movement.<br/></div> © 2021 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Volume fraction},\n%keywords = {Numerical methods;Aspect ratio;Morphology;Antennas;Computational fluid dynamics;},\n%note = {CFD-DEM;DEM models;Dense granular collapse;Discrete elements method;Granular collapse;Granular flows;Morphodynamics;Sub-arial and submerged granular flow;Unresolved computational fluid dynamic-discrete element method;Volume fraction evolution;},\nURL = {http://dx.doi.org/10.3390/w13212969},\n} \n\n\n
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Sub-aerial (dry) and submerged dense granular collapses are studied by means of a threephase unresolved computational fluid dynamics-discrete element method (CFD-DEM) numerical model. Physical experiments are also performed to provide data for validation and further analysis. Validations show good compatibility between the numerical and experimental results. Collapse mechanism as well as post-collapse morphological parameters, such as granular surface profile and runout distance, are analyzed. The spatiotemporal variation of solid volume fraction is also investigated. The effect granular column aspect ratio is studied and found to be a key factor in granular morphology for both submerged and dry conditions. The volume fraction analysis evolution shows an expansion and re-compaction trend, correlated with the granular movement.
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Experimental Investigations on the Lateral Cyclic Response of Post-Tensioned Rocking Steel Bridge Piers.\n \n \n \n \n\n\n \n Rahmzadeh, A.; Alam, M. S.; and Tremblay, R.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 147(12). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214010980782 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental Investigations on the Lateral Cyclic Response of Post-Tensioned Rocking Steel Bridge Piers},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Rahmzadeh, Ahmad and Alam, M. Shahria and Tremblay, Robert},\nvolume = {147},\nnumber = {12},\nyear = {2021},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents the results of a series of unidirectional quasi-static cyclic tests on 1/3-scale post-tensioned rocking steel bridge column specimens designed to rock at the interface with the foundation. The objective was to examine the effects of column diameter-to-thickness ratio, base plate, and energy dissipaters and their locations on the lateral cyclic behavior of the system. Site-specific cyclic displacement loading protocols were developed by performing time-history analyses of the pier. Emphasis was placed upon the sources of lateral response degradation including elastic restoring force reduction, local buckling, and energy dissipater failure. Strain distribution at the rocking plane and along the height, local bulging of the column, and uplift profile are discussed. The influence of multiple loading on the lateral response was also investigated. A component testing program was conducted to characterize the cyclic loss of post-tension force due to wedge seating in a typical industry monostrand anchorage system. The column test results demonstrate that a stable and robust self-centering response can be achieved with minimal damage to the column and most of the hysteretic energy is confined within the replaceable elements.<br/></div> © 2021 American Society of Civil Engineers.},\nkey = {Buckling},\n%keywords = {Piers;Steel bridges;Testing;Software testing;Steel testing;Bridge piers;},\n%note = {Cyclic tests;Energy dissipaters;Experimental investigations;Lateral cyclic response;Lateral response;Post tensioned;Quasi-static;Rocking;Seating loss;Steel bridge piers;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0003197},\n} \n\n\n
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This paper presents the results of a series of unidirectional quasi-static cyclic tests on 1/3-scale post-tensioned rocking steel bridge column specimens designed to rock at the interface with the foundation. The objective was to examine the effects of column diameter-to-thickness ratio, base plate, and energy dissipaters and their locations on the lateral cyclic behavior of the system. Site-specific cyclic displacement loading protocols were developed by performing time-history analyses of the pier. Emphasis was placed upon the sources of lateral response degradation including elastic restoring force reduction, local buckling, and energy dissipater failure. Strain distribution at the rocking plane and along the height, local bulging of the column, and uplift profile are discussed. The influence of multiple loading on the lateral response was also investigated. A component testing program was conducted to characterize the cyclic loss of post-tension force due to wedge seating in a typical industry monostrand anchorage system. The column test results demonstrate that a stable and robust self-centering response can be achieved with minimal damage to the column and most of the hysteretic energy is confined within the replaceable elements.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Probabilistic seismic resilience quantification of a reinforced masonry shear wall system with boundary elements under bi-directional horizontal excitations.\n \n \n \n \n\n\n \n Hosseinzadeh, S.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 247. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ProbabilisticPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213810929653 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Probabilistic seismic resilience quantification of a reinforced masonry shear wall system with boundary elements under bi-directional horizontal excitations},\njournal = {Engineering Structures},\nauthor = {Hosseinzadeh, Shadman and Galal, Khaled},\nvolume = {247},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">The concept of resilience is gaining increased attention in disaster management due to the recent awareness of the need to reduce the detrimental post-event effects of natural disasters, e.g., earthquakes. Resilience is a practical concept that includes pre-event (preparedness and mitigation) and post-event (response and recovery) activities. Quantitative resilience assessment approaches are needed to compare the available mitigation strategies to decide on the most suitable strategy and provide better support for decision-making procedures. In this study, a methodology for quantifying the seismic resilience of reinforced masonry shear wall (RMSW) buildings with end-confined masonry boundary elements is implemented. The uncertainties associated with structural and non-structural losses and estimated recovery time uncertainties are considered while quantifying the resilience index of RMSW buildings. The archetype buildings studied have 8-, 10-, and 12-storey heights and are located in Vancouver, representing a high seismic zone in Canada. First, a numerical model was developed using OpenSees to derive the fragility surface for the studied archetypes subjected to bi-directional horizontal excitation. Second, a Monte Carlo simulation was performed to quantify the resilience index of each archetype considering the above-mentioned uncertainties. The results prove the robustness of ductile RMSW buildings having end-confined MBEs in mitigating the losses associated with disaster events. Additionally, the findings provide comprehensive and valuable information for earthquake mitigation measures and disaster risk reduction programmes.<br/></div> © 2021 Elsevier Ltd},\nkey = {Uncertainty analysis},\n%keywords = {Earthquakes;Decision making;Disaster prevention;Disasters;Reinforcement;Risk assessment;Monte Carlo methods;Shear walls;Masonry materials;Intelligent systems;},\n%note = {Bi-directional;Boundary elements;Confined masonry;End-confined masonry boundary element;Fragility surface;Masonry shear walls;Monte Carlo's simulation;Reinforced masonry;Reinforced masonry shear wall;Seismic resilience;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.113023},\n} \n\n\n
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The concept of resilience is gaining increased attention in disaster management due to the recent awareness of the need to reduce the detrimental post-event effects of natural disasters, e.g., earthquakes. Resilience is a practical concept that includes pre-event (preparedness and mitigation) and post-event (response and recovery) activities. Quantitative resilience assessment approaches are needed to compare the available mitigation strategies to decide on the most suitable strategy and provide better support for decision-making procedures. In this study, a methodology for quantifying the seismic resilience of reinforced masonry shear wall (RMSW) buildings with end-confined masonry boundary elements is implemented. The uncertainties associated with structural and non-structural losses and estimated recovery time uncertainties are considered while quantifying the resilience index of RMSW buildings. The archetype buildings studied have 8-, 10-, and 12-storey heights and are located in Vancouver, representing a high seismic zone in Canada. First, a numerical model was developed using OpenSees to derive the fragility surface for the studied archetypes subjected to bi-directional horizontal excitation. Second, a Monte Carlo simulation was performed to quantify the resilience index of each archetype considering the above-mentioned uncertainties. The results prove the robustness of ductile RMSW buildings having end-confined MBEs in mitigating the losses associated with disaster events. Additionally, the findings provide comprehensive and valuable information for earthquake mitigation measures and disaster risk reduction programmes.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Component-based model for bolted brace connections in conventional concentrically braced frames.\n \n \n \n \n\n\n \n Wang, C.; Tremblay, R.; and Rogers, C. A.\n\n\n \n\n\n\n Engineering Structures, 247. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"Component-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213710882778 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Component-based model for bolted brace connections in conventional concentrically braced frames},\njournal = {Engineering Structures},\nauthor = {Wang, Chen and Tremblay, Robert and Rogers, Colin A.},\nvolume = {247},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">In low and moderate seismic regions, low-ductility concentrically braced frames (CBFs) are widely used as the seismic force-resisting system for steel structures. The capacity-based design method is not required for such systems, i.e. no individual component in the lateral load carrying path is explicitly designated to sustain plastic deformations under seismic loading. Such CBFs are referred to as conventional CBFs (CCBFs) in this paper. Prior studies have revealed that, in CCBFs, the brace-to-gusset connections are inherently weaker in tension than the adjoining braces and gusset plates. Therefore, the accurate numerical modelling of the brace connections is critical for the reliable seismic evaluation of CCBFs. However, few research publications address the inelastic bolted brace connection modelling necessary for the structural analyses of these braced frame systems. In this paper, an efficient inelastic numerical modelling method, comprising the component-based modelling concept, is proposed for bolted brace connections. The accuracy of the numerical model is validated through comparison with laboratory test results of full-scale I-shape brace connection specimens. Eight single-storey CCBFs with the symmetric diagonal bracing configuration were designed and modeled. The nonlinear static and dynamic analyses revealed that: 1) although the buckling of the middle column at small storey drifts resulted in substantial lateral strength deterioration, a secondary seismic mechanism provided stable resistance to prevent collapse; 2) when loaded in tension, the brace connections deformed more than the braces; 3) stronger brace connections resulted in higher structural lateral stiffness and triggered earlier buckling of the middle column; 4) stronger brace connections possessed higher frictional energy-dissipating capacity which reduced the maximum storey drift.<br/></div> © 2021 Elsevier Ltd},\nkey = {Ductility},\n%keywords = {Bolts;Deterioration;Buckling;Numerical models;Seismic design;Numerical methods;Structural frames;Seismology;},\n%note = {Bolted brace connection;Component-based models;Concentrically braced frames;Design method;Force resisting systems;Individual components;Low ductility;Non-linear dynamic analysis;Seismic forces;Seismic regions;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.113137},\n} \n\n\n
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In low and moderate seismic regions, low-ductility concentrically braced frames (CBFs) are widely used as the seismic force-resisting system for steel structures. The capacity-based design method is not required for such systems, i.e. no individual component in the lateral load carrying path is explicitly designated to sustain plastic deformations under seismic loading. Such CBFs are referred to as conventional CBFs (CCBFs) in this paper. Prior studies have revealed that, in CCBFs, the brace-to-gusset connections are inherently weaker in tension than the adjoining braces and gusset plates. Therefore, the accurate numerical modelling of the brace connections is critical for the reliable seismic evaluation of CCBFs. However, few research publications address the inelastic bolted brace connection modelling necessary for the structural analyses of these braced frame systems. In this paper, an efficient inelastic numerical modelling method, comprising the component-based modelling concept, is proposed for bolted brace connections. The accuracy of the numerical model is validated through comparison with laboratory test results of full-scale I-shape brace connection specimens. Eight single-storey CCBFs with the symmetric diagonal bracing configuration were designed and modeled. The nonlinear static and dynamic analyses revealed that: 1) although the buckling of the middle column at small storey drifts resulted in substantial lateral strength deterioration, a secondary seismic mechanism provided stable resistance to prevent collapse; 2) when loaded in tension, the brace connections deformed more than the braces; 3) stronger brace connections resulted in higher structural lateral stiffness and triggered earlier buckling of the middle column; 4) stronger brace connections possessed higher frictional energy-dissipating capacity which reduced the maximum storey drift.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Nonlinear Dynamic Response of Single-Degree-of-Freedom Systems Subjected to Along-Wind Loads. II: Implications for Structural Reliability.\n \n \n \n \n\n\n \n Bezabeh, M. A.; Bitsuamlak, G. T.; and Tesfamariam, S.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 147(11). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"NonlinearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213610851206 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Nonlinear Dynamic Response of Single-Degree-of-Freedom Systems Subjected to Along-Wind Loads. II: Implications for Structural Reliability},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Bezabeh, Matiyas A. and Bitsuamlak, Girma T. and Tesfamariam, Solomon},\nvolume = {147},\nnumber = {11},\nyear = {2021},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">Part I of the two companion papers postulated and proved the capability of self-centering systems in controlling the wind-induced damage accumulations due to long-duration along-wind loads. The present Part II paper demonstrates the benefits of ductility-based wind design in terms of economics and safety through structural reliability analysis. Initially, for self-centering systems, the ductility demands are estimated for various levels of force reduction factors, structural damping, postyield stiffness ratio, natural frequency, and energy dissipation capacity. To reduce the computational cost of structural reliability analysis, empirical equations of the mean of peak ductility demands are derived in terms of the force reduction factor and natural frequency. In the reliability estimations, two limit states, the first significant yield and incipient collapse, are considered. Both analytical and simulation techniques are used to compute the failure probabilities by considering uncertainties in both the wind load effects and capacity. Overall, the results indicate that ductile self-centering systems could be designed for reduced along-wind loads and still achieve the minimum required safety level. The results also reveal that self-centering systems designed using the linear-elastic approach but additionally detailed for ductility have a significant reserve of safety against incipient collapse.<br/></div> © 2021 American Society of Civil Engineers.},\nkey = {Natural frequencies},\n%keywords = {Aerodynamic loads;Ductility;Wind stress;Energy dissipation;Reliability analysis;Structural analysis;Degrees of freedom (mechanics);Safety engineering;},\n%note = {Energy dissipation capacities;Peak ductility demands;Reliability estimation;Self-centering system;Simulation technique;Single degree of freedom systems;Structural reliability;Structural reliability analysis;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0003124},\n} \n\n\n
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Part I of the two companion papers postulated and proved the capability of self-centering systems in controlling the wind-induced damage accumulations due to long-duration along-wind loads. The present Part II paper demonstrates the benefits of ductility-based wind design in terms of economics and safety through structural reliability analysis. Initially, for self-centering systems, the ductility demands are estimated for various levels of force reduction factors, structural damping, postyield stiffness ratio, natural frequency, and energy dissipation capacity. To reduce the computational cost of structural reliability analysis, empirical equations of the mean of peak ductility demands are derived in terms of the force reduction factor and natural frequency. In the reliability estimations, two limit states, the first significant yield and incipient collapse, are considered. Both analytical and simulation techniques are used to compute the failure probabilities by considering uncertainties in both the wind load effects and capacity. Overall, the results indicate that ductile self-centering systems could be designed for reduced along-wind loads and still achieve the minimum required safety level. The results also reveal that self-centering systems designed using the linear-elastic approach but additionally detailed for ductility have a significant reserve of safety against incipient collapse.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Nonlinear Dynamic Response of Single-Degree-of-Freedom Systems Subjected to Along-Wind Loads. I: Parametric Study.\n \n \n \n \n\n\n \n Bezabeh, M. A.; Bitsuamlak, G. T.; and Tesfamariam, S.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 147(11). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"NonlinearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213610851001 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Nonlinear Dynamic Response of Single-Degree-of-Freedom Systems Subjected to Along-Wind Loads. I: Parametric Study},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Bezabeh, Matiyas A. and Bitsuamlak, Girma T. and Tesfamariam, Solomon},\nvolume = {147},\nnumber = {11},\nyear = {2021},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">The lateral strength and stiffness requirements due to wind loads usually govern the design of tall buildings. The current building codes in the US, Canada, and Europe recognize the first significant yield point as an ultimate limit state. Consequently, the current design practices ignore the plastic capacity of structural systems in the nonlinear range, which could result in overdesigned buildings. Thus, the classical linear-elastic design arguments shall be reexamined with consideration of performance-based wind design (PBWD) approaches, innovative technologies, and materials. We are presenting two companion papers to demonstrate the benefits of considering the nonlinear capacity of structural systems in the design of wind-excited buildings. In this paper, Part I, we have postulated and then proved the capability of self-centering systems in controlling the possible damage accumulation in structural systems subjected to along-wind loads. Our arguments are based on an extensive parametric study through nonlinear time history analyses considering peak and residual ductility-demands, normalized hysteretic energy dissipation, and the rate of damage accumulation as performance indicators. Overall, the results of the parametric study revealed that self-centering systems could benefit the most from the ductility-based design due to their inherent recentering capability, higher energy dissipation, and lower sensitivity to wind duration. Consistent with the notion of PBWD, for self-centering systems, the companion Part II paper demonstrates the benefits of the ductility-based wind design in terms of economics and safety through structural reliability analysis.<br/></div> © 2021 American Society of Civil Engineers.},\nkey = {Tall buildings},\n%keywords = {Architectural design;Reliability analysis;Wind stress;Aerodynamic loads;Building codes;Ductility;Energy dissipation;Hysteresis;Stiffness;Degrees of freedom (mechanics);Structural analysis;},\n%note = {Ductility-based designs;Hysteretic energy dissipations;Innovative technology;Nonlinear time history analysis;Performance indicators;Self-centering system;Single degree of freedom systems;Structural reliability analysis;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0003125},\n} \n\n\n
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The lateral strength and stiffness requirements due to wind loads usually govern the design of tall buildings. The current building codes in the US, Canada, and Europe recognize the first significant yield point as an ultimate limit state. Consequently, the current design practices ignore the plastic capacity of structural systems in the nonlinear range, which could result in overdesigned buildings. Thus, the classical linear-elastic design arguments shall be reexamined with consideration of performance-based wind design (PBWD) approaches, innovative technologies, and materials. We are presenting two companion papers to demonstrate the benefits of considering the nonlinear capacity of structural systems in the design of wind-excited buildings. In this paper, Part I, we have postulated and then proved the capability of self-centering systems in controlling the possible damage accumulation in structural systems subjected to along-wind loads. Our arguments are based on an extensive parametric study through nonlinear time history analyses considering peak and residual ductility-demands, normalized hysteretic energy dissipation, and the rate of damage accumulation as performance indicators. Overall, the results of the parametric study revealed that self-centering systems could benefit the most from the ductility-based design due to their inherent recentering capability, higher energy dissipation, and lower sensitivity to wind duration. Consistent with the notion of PBWD, for self-centering systems, the companion Part II paper demonstrates the benefits of the ductility-based wind design in terms of economics and safety through structural reliability analysis.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Shake-table response simulation of a URM building specimen using discrete micro-models with varying degrees of detail.\n \n \n \n \n\n\n \n Calo, M.; Malomo, D.; Gabbianelli, G.; and Pinho, R.\n\n\n \n\n\n\n Bulletin of Earthquake Engineering, 19(14): 5953 - 5976. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"Shake-tablePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213510820354 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shake-table response simulation of a URM building specimen using discrete micro-models with varying degrees of detail},\njournal = {Bulletin of Earthquake Engineering},\nauthor = {Calo, Mattia and Malomo, Daniele and Gabbianelli, Giammaria and Pinho, Rui},\nvolume = {19},\nnumber = {14},\nyear = {2021},\npages = {5953 - 5976},\nissn = {1570761X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Recent technological advances have enabled earthquake engineering researchers to develop numerical models of increasing complexity, capable of duly reproducing even the smallest structural detail. In the case of unreinforced masonry (URM) structures, however, because of their discrete and heterogeneous nature, computational performance tends to decrease exponentially as a function of the adopted refinement level, thus confining the applicability of advanced micro-models, according to which each masonry unit is typically modelled separately, to reduced-scale problems. To enable their use at a building scale, and benefit from considering simultaneously out-of-plane failures, local wall-diaphragm interaction and collapses, researchers often need to decrease the level of detail of specific members or sub-structures. In the current literature, however, the influence of the abovementioned simplifications on the quality of micro-modelling predictions has been only marginally investigated so far, while code-based guidelines are missing. To start addressing such knowledge gap, the dynamic response of a shake-table-tested full-scale URM building specimen has been simulated in this work using a very detailed micro-model, and the results obtained were then compared with those of nominally identical models in which, however, the idealisation of some specific structural elements has been purposely simplified. Aimed at further extending the impact of this study, pushover analyses were also performed using the same models. Preliminary outcomes, which may serve as a reference to develop more informed, effective and targeted multi-scale micro-modelling strategies in the future, indicate that: (i) maximum base shear predictions tend to be less impacted by the introduction of modelling simplifications, (ii) despite requiring more labour, the explicit representation of the brickwork pattern generally led to better results in terms of predicted damage propagation, failure mechanisms and displacement capacity, (iii) using equivalent membranes, as opposed to modelling each component of timber diaphragms, provided acceptable results, making it a plausible alternative for practical applications of micro-modelling approaches.<br/></div> © 2021, The Author(s).},\nkey = {Earthquake engineering},\n%keywords = {Engineering geology;Masonry materials;Failure (mechanical);},\n%note = {Computational performance;Displacement capacity;Explicit representation;Modelling strategies;Out-of-plane failures;Structural elements;Technological advances;Unreinforced masonry;},\nURL = {http://dx.doi.org/10.1007/s10518-021-01202-0},\n} \n\n\n
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Recent technological advances have enabled earthquake engineering researchers to develop numerical models of increasing complexity, capable of duly reproducing even the smallest structural detail. In the case of unreinforced masonry (URM) structures, however, because of their discrete and heterogeneous nature, computational performance tends to decrease exponentially as a function of the adopted refinement level, thus confining the applicability of advanced micro-models, according to which each masonry unit is typically modelled separately, to reduced-scale problems. To enable their use at a building scale, and benefit from considering simultaneously out-of-plane failures, local wall-diaphragm interaction and collapses, researchers often need to decrease the level of detail of specific members or sub-structures. In the current literature, however, the influence of the abovementioned simplifications on the quality of micro-modelling predictions has been only marginally investigated so far, while code-based guidelines are missing. To start addressing such knowledge gap, the dynamic response of a shake-table-tested full-scale URM building specimen has been simulated in this work using a very detailed micro-model, and the results obtained were then compared with those of nominally identical models in which, however, the idealisation of some specific structural elements has been purposely simplified. Aimed at further extending the impact of this study, pushover analyses were also performed using the same models. Preliminary outcomes, which may serve as a reference to develop more informed, effective and targeted multi-scale micro-modelling strategies in the future, indicate that: (i) maximum base shear predictions tend to be less impacted by the introduction of modelling simplifications, (ii) despite requiring more labour, the explicit representation of the brickwork pattern generally led to better results in terms of predicted damage propagation, failure mechanisms and displacement capacity, (iii) using equivalent membranes, as opposed to modelling each component of timber diaphragms, provided acceptable results, making it a plausible alternative for practical applications of micro-modelling approaches.
© 2021, The Author(s).\n
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\n \n\n \n \n \n \n \n \n Tracking the Environmental Consequences of Circular Economy over Space and Time: The Case of Close: The Open-Loop Recovery of Postconsumer Glass.\n \n \n \n \n\n\n \n Lessard, J.; Habert, G.; Tagnit-Hamou, A.; and Amor, B.\n\n\n \n\n\n\n Environmental Science and Technology, 55(17): 11521 - 11532. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"TrackingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213510829880 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Tracking the Environmental Consequences of Circular Economy over Space and Time: The Case of Close: The Open-Loop Recovery of Postconsumer Glass},\njournal = {Environmental Science and Technology},\nauthor = {Lessard, Jean-Martin and Habert, Guillaume and Tagnit-Hamou, Arezki and Amor, Ben},\nvolume = {55},\nnumber = {17},\nyear = {2021},\npages = {11521 - 11532},\nissn = {0013936X},\nabstract = {<div data-language="eng" data-ev-field="abstract">With the increasing globalization of waste-derived raw materials, region-oriented circular economy measures that stimulate resource recovery can cause far-reaching ripple effects in geographically dispersed markets, with unintended environmental effects. Identifying, quantifying, and characterizing these implications in a multiregional economic system remains challenging. This Policy Analysis aims to track these market-mediated environmental consequences over space and time with high material resolution. It explores a novel avenue of coupling consequential life cycle assessment and a time-series multiregional material-product chains model. The model is applied to two measures to recover postconsumer glass waste in the province of Quebec (Canada): improving closed-loop bottle-to-bottle resource recovery systems and deploying open-loop system for the marketing of glass powder as a supplementary cementitious material. Their environmental consequence trajectories (2030-2050) across a seven-industry and six-region competing symbiosis are examined. In both cases, cost-based optimized results highlight widespread adjustments in eastern North America trade patterns that are expanding over time in response to the coevolution of symbiotic industries. Between 55% and 94% of the environmental benefits are felt beyond Quebec borders. This information can help decision makers better anticipate the in- and cross-border scope of their measures and coordinate across jurisdictions to maximize overall environmental benefits.<br/></div> © 2021 American Chemical Society},\nkey = {Supply chains},\n%keywords = {Natural resources;Decision making;Environmental impact;Recovery;Life cycle;Glass;},\n%note = {Consequential life-cycle assessment;Eastern north america;Environmental benefits;Environmental consequences;Material products;Open loop systems;Resource recovery;Supplementary cementitious material;},\nURL = {http://dx.doi.org/10.1021/acs.est.1c03074},\n} \n\n\n
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With the increasing globalization of waste-derived raw materials, region-oriented circular economy measures that stimulate resource recovery can cause far-reaching ripple effects in geographically dispersed markets, with unintended environmental effects. Identifying, quantifying, and characterizing these implications in a multiregional economic system remains challenging. This Policy Analysis aims to track these market-mediated environmental consequences over space and time with high material resolution. It explores a novel avenue of coupling consequential life cycle assessment and a time-series multiregional material-product chains model. The model is applied to two measures to recover postconsumer glass waste in the province of Quebec (Canada): improving closed-loop bottle-to-bottle resource recovery systems and deploying open-loop system for the marketing of glass powder as a supplementary cementitious material. Their environmental consequence trajectories (2030-2050) across a seven-industry and six-region competing symbiosis are examined. In both cases, cost-based optimized results highlight widespread adjustments in eastern North America trade patterns that are expanding over time in response to the coevolution of symbiotic industries. Between 55% and 94% of the environmental benefits are felt beyond Quebec borders. This information can help decision makers better anticipate the in- and cross-border scope of their measures and coordinate across jurisdictions to maximize overall environmental benefits.
© 2021 American Chemical Society\n
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\n \n\n \n \n \n \n \n \n Experimental program on the flexural response of steel joist top chord extensions.\n \n \n \n \n\n\n \n Assily Alegre, M.; and Tremblay, R.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 186. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213410793377 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental program on the flexural response of steel joist top chord extensions},\njournal = {Journal of Constructional Steel Research},\nauthor = {Assily Alegre, Michel-Ange and Tremblay, Robert},\nvolume = {186},\nyear = {2021},\nissn = {0143974X},\nabstract = {<div data-language="eng" data-ev-field="abstract">This article describes an experimental program performed to investigate the stability response of the top chord member of open web steel joists extending as cantilevered members to support floor or roof extensions. The program included 15 full-scale specimens. Four different cross-sections were examined: single-C's, double C's back-to-back, double angle back-to-back, and cross-sections formed by a C-shape and an angle placed back-to-back. C and angle cross-section profiles were varied as well as the boundary conditions used for the top chord extension. The buckled shapes were examined using digitally scanned 3D renderings and monitored image correlation data. The ultimate strength, strains and the displacements of the extensions were measured to characterize their behaviours and be able to reproduce the test results with numerical simulations. Tensile tests and 4-point bending tests were performed to characterize the material properties. The influence of the restraint conditions and the type of section on flexural strength is presented. In all extension tests, failure took place at, or near the support by a combination of flexural yielding, lateral-torsional buckling (LTB) and local buckling. Extensions built with single C shapes without top flange lateral bracing failed by LTB and could not reach their plastic flexural strength. All specimens with top flange bracing could attain their plastic flexural capacity, although local buckling was observed near the bearing seats in most cases. For the deeper 2-C cross-sections, LTB of the individual C shapes also occurred near the support. Design methods for joist top chord extensions must account for these instability mechanisms.<br/></div> © 2021 Elsevier Ltd},\nkey = {Bending strength},\n%keywords = {Flanges;Tensile testing;Bending tests;Three dimensional computer graphics;Buckling;},\n%note = {C shape;Experimental program;Flexural response;Lateral-torsional buckling;Local buckling;Open web steel joist;Stability response;Steel decks;Steel joist;Top chord extension;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2021.106890},\n} \n\n\n
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This article describes an experimental program performed to investigate the stability response of the top chord member of open web steel joists extending as cantilevered members to support floor or roof extensions. The program included 15 full-scale specimens. Four different cross-sections were examined: single-C's, double C's back-to-back, double angle back-to-back, and cross-sections formed by a C-shape and an angle placed back-to-back. C and angle cross-section profiles were varied as well as the boundary conditions used for the top chord extension. The buckled shapes were examined using digitally scanned 3D renderings and monitored image correlation data. The ultimate strength, strains and the displacements of the extensions were measured to characterize their behaviours and be able to reproduce the test results with numerical simulations. Tensile tests and 4-point bending tests were performed to characterize the material properties. The influence of the restraint conditions and the type of section on flexural strength is presented. In all extension tests, failure took place at, or near the support by a combination of flexural yielding, lateral-torsional buckling (LTB) and local buckling. Extensions built with single C shapes without top flange lateral bracing failed by LTB and could not reach their plastic flexural strength. All specimens with top flange bracing could attain their plastic flexural capacity, although local buckling was observed near the bearing seats in most cases. For the deeper 2-C cross-sections, LTB of the individual C shapes also occurred near the support. Design methods for joist top chord extensions must account for these instability mechanisms.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Performance of steel moment-resisting frames in post-earthquake horizontally traveling fire.\n \n \n \n \n\n\n \n Chandra, A.; Bhowmick, A.; and Bagchi, A.\n\n\n \n\n\n\n Journal of Structural Fire Engineering, 12(4): 541 - 566. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"PerformancePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213310786559 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance of steel moment-resisting frames in post-earthquake horizontally traveling fire},\njournal = {Journal of Structural Fire Engineering},\nauthor = {Chandra, Amit and Bhowmick, Anjan and Bagchi, Ashutosh},\nvolume = {12},\nnumber = {4},\nyear = {2021},\npages = {541 - 566},\nissn = {20402317},\nabstract = {<div data-language="eng" data-ev-field="abstract">Purpose: The study investigates the performance of a three-story unprotected steel moment-resisting frame (SMRF) designed for high seismic demand in the fire-only (FO) and post-earthquake uniform and traveling fires (PEF). The primary objective is to investigate the effects of seismic residual deformation on the structure's performance in horizontally traveling fires. The traveling fire methodology, unlike conventional fire models, considers a spatially varying temperature environment. Design/methodology/approach: Multi-step finite element simulations were carried out on undamaged and damaged frames to provide insight into the effects of the earthquake-initiated fires on the local and global behavior of SMRF. The earthquake simulations were conducted using nonlinear time history analysis, whereas the structure in the fire was investigated by sequential thermal-structural analysis procedure in ABAQUS. The frame was subjected to a suite of seven ground motions. In total, four horizontal traveling fire sizes were considered along with the Eurocode (EC) parametric fire for a comparison. The deformation history, axial force and moment variation in the critical beams and columns of affected compartments in the fire heating and cooling regimes were examined. The global structural performance in terms of inter-story drifts in FO and PEF scenarios was investigated. Findings: It was observed that the larger traveling fires (25 and 48%) are more detrimental to the case study frame than the uniform EC parametric fire. Besides, no appreciable difference was observed in time and modes of failure of the structure in FO and PEF scenarios within the study's parameters. Originality/value: The present study considers improved traveling fire methodology as an alternate design fire for the first time for the PEF performance of SMRF. The analysis results add to the much needed database on structures' performance in a wide range of fire scenarios.<br/></div> © 2021, Emerald Publishing Limited.},\nkey = {Fires},\n%keywords = {Steel beams and girders;Deformation;Earthquakes;Structural analysis;Structural frames;},\n%note = {Design/methodology/approach;Earthquake simulation;Finite element simulations;Nonlinear time history analysis;Residual deformation;Steel moment resisting frame;Structural performance;Thermal-structural analysis;},\nURL = {http://dx.doi.org/10.1108/JSFE-09-2020-0028},\n} \n\n\n
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Purpose: The study investigates the performance of a three-story unprotected steel moment-resisting frame (SMRF) designed for high seismic demand in the fire-only (FO) and post-earthquake uniform and traveling fires (PEF). The primary objective is to investigate the effects of seismic residual deformation on the structure's performance in horizontally traveling fires. The traveling fire methodology, unlike conventional fire models, considers a spatially varying temperature environment. Design/methodology/approach: Multi-step finite element simulations were carried out on undamaged and damaged frames to provide insight into the effects of the earthquake-initiated fires on the local and global behavior of SMRF. The earthquake simulations were conducted using nonlinear time history analysis, whereas the structure in the fire was investigated by sequential thermal-structural analysis procedure in ABAQUS. The frame was subjected to a suite of seven ground motions. In total, four horizontal traveling fire sizes were considered along with the Eurocode (EC) parametric fire for a comparison. The deformation history, axial force and moment variation in the critical beams and columns of affected compartments in the fire heating and cooling regimes were examined. The global structural performance in terms of inter-story drifts in FO and PEF scenarios was investigated. Findings: It was observed that the larger traveling fires (25 and 48%) are more detrimental to the case study frame than the uniform EC parametric fire. Besides, no appreciable difference was observed in time and modes of failure of the structure in FO and PEF scenarios within the study's parameters. Originality/value: The present study considers improved traveling fire methodology as an alternate design fire for the first time for the PEF performance of SMRF. The analysis results add to the much needed database on structures' performance in a wide range of fire scenarios.
© 2021, Emerald Publishing Limited.\n
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\n \n\n \n \n \n \n \n \n Investigation of the performance of simplified constitutive models in nonlinear 1D effective stress ground response analysis.\n \n \n \n \n\n\n \n Bessette, C.; and Yniesta, S.\n\n\n \n\n\n\n Bulletin of the Seismological Society of America, 111(4): 1954 - 1973. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"InvestigationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213210738730 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigation of the performance of simplified constitutive models in nonlinear 1D effective stress ground response analysis},\njournal = {Bulletin of the Seismological Society of America},\nauthor = {Bessette, Caroline and Yniesta, Samuel},\nvolume = {111},\nnumber = {4},\nyear = {2021},\npages = {1954 - 1973},\nissn = {00371106},\nabstract = {<div data-language="eng" data-ev-field="abstract">Several building codes, such as the National Building Code of Canada, recommend that an effective stress ground response analysis be performed if a liquefiable stratum is identified within a soil profile. Although, constitutive models for total stress ground response analysis have been well verified against earthquake recordings, existing models for effective stress ground response analysis have yet to be thoroughly validated. This article investigates the predictions of five pore pressure models derived for effective stress ground response analysis. First, a dataset of five downhole arrays and two centrifuge experiments in which a potential of liquefactionwas identified is presented. The profiles and ground-motion recordings are selected to represent a broad range of soil properties, ground-motion intensities, and excess-pore pressure generation levels. The differences between predictions of the effective stress models against commonly used 1D ground response total stress equivalent- linear and nonlinear analyses are evaluated. The predicted and measured motions are compared in terms of spectral response and amplification factor. The pore pressure response of all models is evaluated as a function of shear strain and found to agree well with published correlations representing the expected behavior of liquefiable soils. Although, the models show the ability to capture liquefaction triggering, the results indicate that for the selected dataset, total stress simulations were found to be, at least, as precise and accurate as the effective stress simulations. Therefore, simplified models for effective stress ground analysis should be used with caution by practicing engineers to predict surface spectra but can be used confidently to assess the potential for liquefaction triggering.<br/></div> © Seismological Society of America.},\nkey = {Constitutive models},\n%keywords = {Soil liquefaction;Soils;Codes (symbols);Forecasting;Pore pressure;Shear strain;},\n%note = {Amplification factors;Centrifuge experiments;Earthquake recording;Ground motion intensities;Ground motion recording;Ground response analysis;National Building Code of Canada;Practicing engineers;},\nURL = {http://dx.doi.org/10.1785/0120200235},\n} \n\n\n
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Several building codes, such as the National Building Code of Canada, recommend that an effective stress ground response analysis be performed if a liquefiable stratum is identified within a soil profile. Although, constitutive models for total stress ground response analysis have been well verified against earthquake recordings, existing models for effective stress ground response analysis have yet to be thoroughly validated. This article investigates the predictions of five pore pressure models derived for effective stress ground response analysis. First, a dataset of five downhole arrays and two centrifuge experiments in which a potential of liquefactionwas identified is presented. The profiles and ground-motion recordings are selected to represent a broad range of soil properties, ground-motion intensities, and excess-pore pressure generation levels. The differences between predictions of the effective stress models against commonly used 1D ground response total stress equivalent- linear and nonlinear analyses are evaluated. The predicted and measured motions are compared in terms of spectral response and amplification factor. The pore pressure response of all models is evaluated as a function of shear strain and found to agree well with published correlations representing the expected behavior of liquefiable soils. Although, the models show the ability to capture liquefaction triggering, the results indicate that for the selected dataset, total stress simulations were found to be, at least, as precise and accurate as the effective stress simulations. Therefore, simplified models for effective stress ground analysis should be used with caution by practicing engineers to predict surface spectra but can be used confidently to assess the potential for liquefaction triggering.
© Seismological Society of America.\n
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\n \n\n \n \n \n \n \n \n Modeling of thermo-chemo-mechanical properties of anode mixture during the baking process.\n \n \n \n \n\n\n \n Chen, B.; Chaouki, H.; Picard, D.; Lauzon-Gauthier, J.; Alamdari, H.; and Fafard, M.\n\n\n \n\n\n\n Materials, 14(15). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ModelingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213210750466 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modeling of thermo-chemo-mechanical properties of anode mixture during the baking process},\njournal = {Materials},\nauthor = {Chen, Bowen and Chaouki, Hicham and Picard, Donald and Lauzon-Gauthier, Julien and Alamdari, Houshang and Fafard, Mario},\nvolume = {14},\nnumber = {15},\nyear = {2021},\nissn = {19961944},\nabstract = {<div data-language="eng" data-ev-field="abstract">In the Hall–Héroult process, prebaked carbon anodes are utilized to produce primary aluminium. The quality of the anode plays a crucial role in the efficiency of electrowinning primary aluminium. In the production of anodes, the anode baking is considered as the stage most frequently causing anode problems. During the baking process, the anode undergoes complex physicochemical transformations. Moreover, the anode at a lower position, imposed by loading pressures from upper anodes, will creep during this process. Thus, the production of high-quality anodes demands efficient control of their baking process. This paper aims to investigate the thermo-chemo-mechanical properties of the anode paste mixture at high temperatures. These properties include kinetic parameters of pitch pyrolysis such as the activation energy and the pre-exponential factor, the thermal expansion coefficient (TEC) and relevant mechanical parameters related to the elastic, the viscoelastic and the viscoplastic behaviours of the anode. For this purpose, experiments consisting of the thermogravimetric analysis, the dilatometry and the creep test were carried out. Based on the obtained results, the forementioned parameters were identified. Relevant mechanical parameters were expressed as a function of a new variable, called the shrinking index, which is related to the volatile released in open and closed pores of the anode. This variable would be used to highlight the chemo-mechanical coupling effect of the anode mixture. New insights into the phenomena such as the expansion due to the increase of the pore pressure and the chemical shrinkage of the anode during the baking process were also gained in this work. These investigations pave the way for modeling the thermo-chemo-poromechanical behaviour of the anode during the baking process.<br/></div> © 2021 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Creep},\n%keywords = {Thermogravimetric analysis;Aluminum;Mixtures;Thermal expansion;Anodes;Quality control;Dilatometers;Activation energy;Shrinkage;},\n%note = {Chemical shrinkage;Chemo-mechanical couplings;Efficient control;Loading pressures;Mechanical parameters;Physicochemical transformation;Preexponential factor;Thermal expansion coefficients;},\nURL = {http://dx.doi.org/10.3390/ma14154320},\n} \n\n\n
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In the Hall–Héroult process, prebaked carbon anodes are utilized to produce primary aluminium. The quality of the anode plays a crucial role in the efficiency of electrowinning primary aluminium. In the production of anodes, the anode baking is considered as the stage most frequently causing anode problems. During the baking process, the anode undergoes complex physicochemical transformations. Moreover, the anode at a lower position, imposed by loading pressures from upper anodes, will creep during this process. Thus, the production of high-quality anodes demands efficient control of their baking process. This paper aims to investigate the thermo-chemo-mechanical properties of the anode paste mixture at high temperatures. These properties include kinetic parameters of pitch pyrolysis such as the activation energy and the pre-exponential factor, the thermal expansion coefficient (TEC) and relevant mechanical parameters related to the elastic, the viscoelastic and the viscoplastic behaviours of the anode. For this purpose, experiments consisting of the thermogravimetric analysis, the dilatometry and the creep test were carried out. Based on the obtained results, the forementioned parameters were identified. Relevant mechanical parameters were expressed as a function of a new variable, called the shrinking index, which is related to the volatile released in open and closed pores of the anode. This variable would be used to highlight the chemo-mechanical coupling effect of the anode mixture. New insights into the phenomena such as the expansion due to the increase of the pore pressure and the chemical shrinkage of the anode during the baking process were also gained in this work. These investigations pave the way for modeling the thermo-chemo-poromechanical behaviour of the anode during the baking process.
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Sensitivity analysis of the numerical simulations of partially grouted reinforced masonry shear walls.\n \n \n \n \n\n\n \n Elmeligy, O.; Aly, N.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 245. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"SensitivityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213210743104 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Sensitivity analysis of the numerical simulations of partially grouted reinforced masonry shear walls},\njournal = {Engineering Structures},\nauthor = {Elmeligy, Omar and Aly, Nader and Galal, Khaled},\nvolume = {245},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">A simplified finite element (FE) model is proposed using VecTor2 software to simulate the cyclic behavior of partially grouted reinforced masonry shear walls (PG-RMSWs) constructed with concrete-masonry blocks and having reinforced bond beams. The proposed model is validated against different experimentally tested walls available in the literature and is found to be capable of simulating the experimental behavior. Following the development of the validated model, a sensitivity analysis is conducted to study the relative effect of different grouted and ungrouted masonry modeling input parameters on the seismic response of the modeled walls. In this regard, six reference walls with different aspect ratios and different vertical reinforcement spacings are modeled. Afterward, reference values of masonry modeling input parameters are changed within ±30% from the reference values yielding 126 modeled walls. A numerical study is also conducted to compare the response of fully grouted reinforced masonry shear walls (FG-RMSWs) and PG-RMSWs to investigate the differences in their behaviors. In this regard, four walls with different aspect ratios and spacings between vertical grouted cells are considered. For the sensitivity analysis, it is concluded that the parameters of the ungrouted masonry are the most influential ones, where the walls' behavior is primarily sensitive to the input value of the angle of internal friction between blocks and mortar. However, this effect diminishes as the aspect ratio of the wall increases and spacing between grouted cells decreases. Accordingly, for shorter walls and walls with larger spacing between grouted cells, more attention shall be given to the estimation of the parameters representing the material properties of ungrouted masonry, especially the angle of internal friction. This concludes that a better seismic response of PG-RMSWs can be achieved by improving the properties of the block-mortar interface in the ungrouted portions of the walls. Comparisons of the seismic response of FG-RMSWs with PG-RMSWs show that FG walls with a lower aspect ratio have a higher ultimate load and a lower corresponding displacement compared to their PG counterparts. For walls with a higher aspect ratio, both the ultimate load and the corresponding displacement are larger for FG walls.<br/></div> © 2021 Elsevier Ltd},\nkey = {Sensitivity analysis},\n%keywords = {Reinforcement;Concrete construction;Aspect ratio;Grouting;Shear walls;Seismic response;Internal friction;Mortar;},\n%note = {Aspect-ratio;Input parameter;Masonry modelling;Masonry shear walls;Model inputs;Partially grouted;Reference values;Reinforced masonry;Simplified micro-modeling;Tornado diagrams;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.112876},\n} \n\n\n
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A simplified finite element (FE) model is proposed using VecTor2 software to simulate the cyclic behavior of partially grouted reinforced masonry shear walls (PG-RMSWs) constructed with concrete-masonry blocks and having reinforced bond beams. The proposed model is validated against different experimentally tested walls available in the literature and is found to be capable of simulating the experimental behavior. Following the development of the validated model, a sensitivity analysis is conducted to study the relative effect of different grouted and ungrouted masonry modeling input parameters on the seismic response of the modeled walls. In this regard, six reference walls with different aspect ratios and different vertical reinforcement spacings are modeled. Afterward, reference values of masonry modeling input parameters are changed within ±30% from the reference values yielding 126 modeled walls. A numerical study is also conducted to compare the response of fully grouted reinforced masonry shear walls (FG-RMSWs) and PG-RMSWs to investigate the differences in their behaviors. In this regard, four walls with different aspect ratios and spacings between vertical grouted cells are considered. For the sensitivity analysis, it is concluded that the parameters of the ungrouted masonry are the most influential ones, where the walls' behavior is primarily sensitive to the input value of the angle of internal friction between blocks and mortar. However, this effect diminishes as the aspect ratio of the wall increases and spacing between grouted cells decreases. Accordingly, for shorter walls and walls with larger spacing between grouted cells, more attention shall be given to the estimation of the parameters representing the material properties of ungrouted masonry, especially the angle of internal friction. This concludes that a better seismic response of PG-RMSWs can be achieved by improving the properties of the block-mortar interface in the ungrouted portions of the walls. Comparisons of the seismic response of FG-RMSWs with PG-RMSWs show that FG walls with a lower aspect ratio have a higher ultimate load and a lower corresponding displacement compared to their PG counterparts. For walls with a higher aspect ratio, both the ultimate load and the corresponding displacement are larger for FG walls.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Assessment and modeling of the debonding failure of fabric-reinforced cementitious matrix (FRCM) systems.\n \n \n \n \n\n\n \n Mandor, A.; and Refai, A. E.\n\n\n \n\n\n\n Composite Structures, 275. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"AssessmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213110710563 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment and modeling of the debonding failure of fabric-reinforced cementitious matrix (FRCM) systems},\njournal = {Composite Structures},\nauthor = {Mandor, Ahmed and Refai, Ahmed El},\nvolume = {275},\nyear = {2021},\nissn = {02638223},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper aims at developing a model that is capable to accurately predict the debonding strains in reinforced concrete (RC) members strengthened with fabric-reinforced cementitious matrix (FRCM) systems. A large database consisting of 393 shear bond specimens strengthened with Polyparaphenylene Benzobisoxazole (PBO), Carbon (C), Glass (G), and Steel (S) FRCM systems was firstly compiled from the published literature. A sensitivity analysis was carried out to identify the key parameters that most affected the debonding mechanism in FRCM. The notable influence of the compressive and tensile strengths of the concrete substrate, the compressive strength of FRCM mortar, and the axial stiffness of FRCM system on the debonding strains in FRCM systems was evidenced. Contrarily, the tensile strength of FRCM mortars showed slight or no impact on the FRCM debonding strains. Based on the results of the sensitivity analysis, three simple models were developed using a multivariate nonlinear regression analysis. The models were then optimized and validated against the experimental results of 41 flexural members strengthened with different types of FRCM systems. Two of the three models proved an excellent prediction performance of the debonding strains with an average predicted–to–experimental strain ratios, Ε<inf>pred</inf>/Ε<inf>exp</inf>, of 0.99 ± 0.27 and 1.02 ± 0.27 with coefficients of variation (COV) of 0.28 and 0.26, respectively. Both models could safely predict the debonding strains in FRCM-strengthened members regardless of the type of FRCM system used. Neglecting the tensile strength of the concrete substrate in the third model resulted in an average Ε<inf>pred</inf>/Ε<inf>exp</inf> ratio of 0.85 ± 0.37 with a COV of 0.44.<br/></div> © 2021 Elsevier Ltd},\nkey = {Regression analysis},\n%keywords = {Compressive strength;Failure (mechanical);Strain;Forecasting;Debonding;Reinforced concrete;Sensitivity analysis;Tensile strength;Mortar;},\n%note = {Cementitious matrices;Coefficients of variations;Concrete substrates;Debonding failure;Fabric reinforced cementitious matrix;Flexure;Large database;Matrix systems;Modeling;Reinforced concrete member;},\nURL = {http://dx.doi.org/10.1016/j.compstruct.2021.114394},\n} \n\n\n
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This paper aims at developing a model that is capable to accurately predict the debonding strains in reinforced concrete (RC) members strengthened with fabric-reinforced cementitious matrix (FRCM) systems. A large database consisting of 393 shear bond specimens strengthened with Polyparaphenylene Benzobisoxazole (PBO), Carbon (C), Glass (G), and Steel (S) FRCM systems was firstly compiled from the published literature. A sensitivity analysis was carried out to identify the key parameters that most affected the debonding mechanism in FRCM. The notable influence of the compressive and tensile strengths of the concrete substrate, the compressive strength of FRCM mortar, and the axial stiffness of FRCM system on the debonding strains in FRCM systems was evidenced. Contrarily, the tensile strength of FRCM mortars showed slight or no impact on the FRCM debonding strains. Based on the results of the sensitivity analysis, three simple models were developed using a multivariate nonlinear regression analysis. The models were then optimized and validated against the experimental results of 41 flexural members strengthened with different types of FRCM systems. Two of the three models proved an excellent prediction performance of the debonding strains with an average predicted–to–experimental strain ratios, Εpredexp, of 0.99 ± 0.27 and 1.02 ± 0.27 with coefficients of variation (COV) of 0.28 and 0.26, respectively. Both models could safely predict the debonding strains in FRCM-strengthened members regardless of the type of FRCM system used. Neglecting the tensile strength of the concrete substrate in the third model resulted in an average Εpredexp ratio of 0.85 ± 0.37 with a COV of 0.44.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n BIPV/T curtain wall systems: Design, development and testing.\n \n \n \n \n\n\n \n Rounis, E. D.; Athienitis, A. K.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Building Engineering, 42. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"BIPV/TPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213110711714 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {BIPV/T curtain wall systems: Design, development and testing},\njournal = {Journal of Building Engineering},\nauthor = {Rounis, Efstratios Dimitrios and Athienitis, Andreas K. and Stathopoulos, Theodore},\nvolume = {42},\nyear = {2021},\nissn = {23527102},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents the design, development and experimental testing of a Building Integrated Photovoltaic/Thermal (BIPV/T) curtain wall prototype. The main purpose of this study was to address the lack of design standardization in BIPV/T systems, which has been identified as a major factor for the limited number of applications of such systems, by proposing a BIPV/T design approach based on a well-established building practice, incorporating thermal enhancement techniques suitable for building integration. Additionally, this study addressed the applicability of commonly used expressions for convective heat transfer in PV/T modelling. A BIPV/T curtain wall prototype was studied experimentally in an indoor solar simulator facility. Thermal enhancement techniques, including multiple inlets, semi-transparent instead of opaque PV and a newly introduced flow deflector were evaluated. Test results showed a thermal efficiency of up to 33%. A multiple-inlet configuration assisted by a flow deflector behind the PV panel was found to enhance the thermal performance by up to 16% and reduced the peak PV temperatures by 3.5 °C, with a marginal increase in the electrical efficiency. The recorded Nusselt numbers were found to have poor or marginal agreement with the expressions presented in the relevant literature, indicating the need for a more generalized approach for the modelling of convective phenomena in BIPV/T systems. This study provides a foundation for air-based BIPV/T design standardization and incorporation of common building practices, and highlights issues regarding convective heat transfer modelling.<br/></div> © 2021},\nkey = {Standardization},\n%keywords = {Heat convection;Solar panels;Electrical efficiency;Walls (structural partitions);Architectural design;},\n%note = {Building integrated photovoltaic;Building integrated photovoltaic/thermal;Building integrated photovoltaic/thermal design;Curtain-walls;Design development;In-buildings;Modeling;Photovoltaic thermals;Photovoltaic/thermal systems;Thermal Performance;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2021.103019},\n} \n\n\n
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This paper presents the design, development and experimental testing of a Building Integrated Photovoltaic/Thermal (BIPV/T) curtain wall prototype. The main purpose of this study was to address the lack of design standardization in BIPV/T systems, which has been identified as a major factor for the limited number of applications of such systems, by proposing a BIPV/T design approach based on a well-established building practice, incorporating thermal enhancement techniques suitable for building integration. Additionally, this study addressed the applicability of commonly used expressions for convective heat transfer in PV/T modelling. A BIPV/T curtain wall prototype was studied experimentally in an indoor solar simulator facility. Thermal enhancement techniques, including multiple inlets, semi-transparent instead of opaque PV and a newly introduced flow deflector were evaluated. Test results showed a thermal efficiency of up to 33%. A multiple-inlet configuration assisted by a flow deflector behind the PV panel was found to enhance the thermal performance by up to 16% and reduced the peak PV temperatures by 3.5 °C, with a marginal increase in the electrical efficiency. The recorded Nusselt numbers were found to have poor or marginal agreement with the expressions presented in the relevant literature, indicating the need for a more generalized approach for the modelling of convective phenomena in BIPV/T systems. This study provides a foundation for air-based BIPV/T design standardization and incorporation of common building practices, and highlights issues regarding convective heat transfer modelling.
© 2021\n
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\n \n\n \n \n \n \n \n \n In-plane stability of an underground support system with steel corrugated webs: Experimental study, finite element analysis, and design formula.\n \n \n \n \n\n\n \n Wu, L.; Wang, H.; and Xie, Y.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 185. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"In-planePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213210726261 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {In-plane stability of an underground support system with steel corrugated webs: Experimental study, finite element analysis, and design formula},\njournal = {Journal of Constructional Steel Research},\nauthor = {Wu, Lili and Wang, Hui and Xie, Yazhou},\nvolume = {185},\nyear = {2021},\nissn = {0143974X},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study proposed an innovative underground support system with I-shaped sections that use steel corrugated webs. The in-plane global buckling behavior of the proposed system was investigated through comprehensive experimental, numerical, and analytical analyses. An experimental test was carried out against a scaled specimen of the proposed support for U-shaped mining roadways when subjected to three concentrated loads. The global asymmetric buckling was identified as the ultimate failure mode. A finite element (FE) model was constructed and verified by comparing its analysis results with the experimental outcomes. Finite element analyses (FEA) first proved that both the stiffness and force capacity of the support with corrugated webs could be much increased when compared with the I-shaped steel that uses flat webs under the same steel consumption. The elastic and elastoplastic buckling analyses from the FEA further indicated that the web height and flange thickness were the influential parameters, from which a closed-form formula was developed to predict the elastic buckling load as a function of the slenderness ratio. Analysis results have shown that the support system will inevitably fail through antisymmetric instability when the slenderness ratio is large, yet the system was not very sensitive to initial imperfections. A design formula for the in-plane compression-bending capacity was derived for the proposed support system by synthesizing and modifying existing relevant design equations. The proposed innovative support system, together with the associated experimental testing, FEA, elastic buckling load formula, and design equation, paves the way to promote its real-world applications as tunnel supports to deal with harsh geological conditions (e.g., soft rocks).<br/></div> © 2021 Elsevier Ltd},\nkey = {Buckling},\n%keywords = {System stability;Finite element method;},\n%note = {Corrugated web;Design formulas;Finite elements analysis;I-shaped steel with corrugated web;Initial imperfection;Numerical study;Slenderness ratios;Stability capacities;Support systems;Underground supports;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2021.106872},\n} \n\n\n
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This study proposed an innovative underground support system with I-shaped sections that use steel corrugated webs. The in-plane global buckling behavior of the proposed system was investigated through comprehensive experimental, numerical, and analytical analyses. An experimental test was carried out against a scaled specimen of the proposed support for U-shaped mining roadways when subjected to three concentrated loads. The global asymmetric buckling was identified as the ultimate failure mode. A finite element (FE) model was constructed and verified by comparing its analysis results with the experimental outcomes. Finite element analyses (FEA) first proved that both the stiffness and force capacity of the support with corrugated webs could be much increased when compared with the I-shaped steel that uses flat webs under the same steel consumption. The elastic and elastoplastic buckling analyses from the FEA further indicated that the web height and flange thickness were the influential parameters, from which a closed-form formula was developed to predict the elastic buckling load as a function of the slenderness ratio. Analysis results have shown that the support system will inevitably fail through antisymmetric instability when the slenderness ratio is large, yet the system was not very sensitive to initial imperfections. A design formula for the in-plane compression-bending capacity was derived for the proposed support system by synthesizing and modifying existing relevant design equations. The proposed innovative support system, together with the associated experimental testing, FEA, elastic buckling load formula, and design equation, paves the way to promote its real-world applications as tunnel supports to deal with harsh geological conditions (e.g., soft rocks).
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Quantifying uncertainty for AWARE characterization factors.\n \n \n \n \n\n\n \n Boulay, A.; Lesage, P.; Amor, B.; and Pfister, S.\n\n\n \n\n\n\n Journal of Industrial Ecology, 25(6): 1588 - 1601. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"QuantifyingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213010677836 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Quantifying uncertainty for AWARE characterization factors},\njournal = {Journal of Industrial Ecology},\nauthor = {Boulay, Anne-Marie and Lesage, Pascal and Amor, Ben and Pfister, Stephan},\nvolume = {25},\nnumber = {6},\nyear = {2021},\npages = {1588 - 1601},\nissn = {10881980},\nabstract = {<div data-language="eng" data-ev-field="abstract">Although it is not yet current practice in life cycle assessment, it is recommended that impact assessment methods be accompanied by their uncertainty data to better guide the decision maker. This work uses the best available information to assess uncertainty of the AWARE model for water scarcity and corresponding sensitivities of input parameters. An uncertainty estimate for the AWARE characterization factors (CFs) is provided via (1) arrays (5000 values per CF) with statistics, (2) dispersion analysis, and (3) distribution best fit and parameters. Results show that uncertainty, represented by the dispersion of the values, varies significantly around the world and tends to be more important in regions of higher scarcity and low in most regions around the world (area based) in terms of absolute spread. Globally, values of 18.8 and 66.28 are found for the spread, represented by the interpercentile range (95%) and interquartile range (25–75%), respectively. The lognormal distribution shows the best fit for most regions around the world and could be used as a default distribution. Two parameters come out as influential: actual water availability (because of precipitation uncertainty) and the global hydrological model itself (because of the variability of results obtained from different models). When compared with uncertainty associated with spatio-temporal variability, uncertainties found in this work are generally lower, and hence improving resolution in water scarcity assessments (to monthly and watershed levels) should remain the priority. Finally, required data for software integration of AWARE uncertainty are provided. This article met the requirements for a Gold-Gold JIE data openness badge described at http://jie.click/badges.<br/></div> © 2021 by Yale University},\nkey = {Uncertainty analysis},\n%keywords = {Decision making;Factor analysis;Dispersions;Gold;Life cycle;},\n%note = {Characterization factors;Hydrological modeling;Inter quartile ranges;Life Cycle Assessment (LCA);Log-normal distribution;Software integration;Spatiotemporal variability;Uncertainty estimates;},\nURL = {http://dx.doi.org/10.1111/jiec.13173},\n} \n\n\n
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Although it is not yet current practice in life cycle assessment, it is recommended that impact assessment methods be accompanied by their uncertainty data to better guide the decision maker. This work uses the best available information to assess uncertainty of the AWARE model for water scarcity and corresponding sensitivities of input parameters. An uncertainty estimate for the AWARE characterization factors (CFs) is provided via (1) arrays (5000 values per CF) with statistics, (2) dispersion analysis, and (3) distribution best fit and parameters. Results show that uncertainty, represented by the dispersion of the values, varies significantly around the world and tends to be more important in regions of higher scarcity and low in most regions around the world (area based) in terms of absolute spread. Globally, values of 18.8 and 66.28 are found for the spread, represented by the interpercentile range (95%) and interquartile range (25–75%), respectively. The lognormal distribution shows the best fit for most regions around the world and could be used as a default distribution. Two parameters come out as influential: actual water availability (because of precipitation uncertainty) and the global hydrological model itself (because of the variability of results obtained from different models). When compared with uncertainty associated with spatio-temporal variability, uncertainties found in this work are generally lower, and hence improving resolution in water scarcity assessments (to monthly and watershed levels) should remain the priority. Finally, required data for software integration of AWARE uncertainty are provided. This article met the requirements for a Gold-Gold JIE data openness badge described at http://jie.click/badges.
© 2021 by Yale University\n
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\n \n\n \n \n \n \n \n \n Designing sustainable partition wall blocks using secondary materials: A life cycle assessment approach.\n \n \n \n \n\n\n \n Hossain, M. U.; Xuan, D.; Ng, S. T.; and Amor, B.\n\n\n \n\n\n\n Journal of Building Engineering, 43. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"DesigningPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213110701642 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Designing sustainable partition wall blocks using secondary materials: A life cycle assessment approach},\njournal = {Journal of Building Engineering},\nauthor = {Hossain, Md. Uzzal and Xuan, Dongxing and Ng, S. Thomas and Amor, Ben},\nvolume = {43},\nyear = {2021},\nissn = {23527102},\nabstract = {<div data-language="eng" data-ev-field="abstract">As considerable amount of waste materials and by-products are generated from the urban and industrial production systems, efforts to utilize such materials resourcefully have received increasing attention in order to increase the use of recycled materials and reduce landfill disposal. In addition, construction products often induce significant environmental burden due to the use of emission-intensive materials. Therefore, continuous scientific efforts have been devoted in resource-efficient design with the incorporation of such secondary materials to help save the primary resources and reduce the environmental impacts. In this study, cement-free partition wall block is developed through a number of strategies, whereby emission-intensive Ordinary Portland cement is completely substituted by waste materials and supplementary cementitious materials, and this together with the use of recycled aggregates can make the blocks produced entirely based on secondary materials. The required mechanical performance of the blocks produced under different strategies is verified through laboratory tests. The carbon reduction potentials for such strategies are evaluated through the life cycle assessment (LCA) technique. The LCA results show that partition wall blocks produced with concrete slurry waste (CSW), fly ash and fine recycled concrete aggregates can reduce up to 82% of the total carbon emissions than other strategies. On the other hand, the reuse of CSW in the production of partition wall blocks can potentially save 80,000 m<sup>3</sup> of landfill space and US$4 million of costs associated with landfill disposal in Hong Kong annually. To maximize the advantages of such secondary resources in partition wall blocks production, it is imperative to establish industrial symbiosis networks with relevant supply chain and to adopt the developed partition wall blocks widely in practice.<br/></div> © 2021 Elsevier Ltd},\nkey = {Life cycle},\n%keywords = {Concrete aggregates;Carbon;Ecodesign;Land fill;Portland cement;Recycling;Supply chains;Fly ash;Sustainable development;},\n%note = {Assessment approaches;Carbon emissions;Industrial production;Landfill disposal;Life Cycle Assessment (LCA);Material circularity;Partition wall blocks;Production system;Recycled materials;Secondary materials;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2021.103035},\n} \n\n\n
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As considerable amount of waste materials and by-products are generated from the urban and industrial production systems, efforts to utilize such materials resourcefully have received increasing attention in order to increase the use of recycled materials and reduce landfill disposal. In addition, construction products often induce significant environmental burden due to the use of emission-intensive materials. Therefore, continuous scientific efforts have been devoted in resource-efficient design with the incorporation of such secondary materials to help save the primary resources and reduce the environmental impacts. In this study, cement-free partition wall block is developed through a number of strategies, whereby emission-intensive Ordinary Portland cement is completely substituted by waste materials and supplementary cementitious materials, and this together with the use of recycled aggregates can make the blocks produced entirely based on secondary materials. The required mechanical performance of the blocks produced under different strategies is verified through laboratory tests. The carbon reduction potentials for such strategies are evaluated through the life cycle assessment (LCA) technique. The LCA results show that partition wall blocks produced with concrete slurry waste (CSW), fly ash and fine recycled concrete aggregates can reduce up to 82% of the total carbon emissions than other strategies. On the other hand, the reuse of CSW in the production of partition wall blocks can potentially save 80,000 m3 of landfill space and US$4 million of costs associated with landfill disposal in Hong Kong annually. To maximize the advantages of such secondary resources in partition wall blocks production, it is imperative to establish industrial symbiosis networks with relevant supply chain and to adopt the developed partition wall blocks widely in practice.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Application of Superabsorbent Polymer as Self-Healing Agent in Self-Consolidating Concrete for Mitigating Precracking Phenomenon at the Rebar-Concrete Interface.\n \n \n \n \n\n\n \n Mousavi, S. S.; Guizani, L.; Bhojaraju, C.; and Ouellet-Plamondon, C. M.\n\n\n \n\n\n\n Journal of Materials in Civil Engineering, 33(10). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ApplicationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213110695191 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Application of Superabsorbent Polymer as Self-Healing Agent in Self-Consolidating Concrete for Mitigating Precracking Phenomenon at the Rebar-Concrete Interface},\njournal = {Journal of Materials in Civil Engineering},\nauthor = {Mousavi, Seyed Sina and Guizani, Lotfi and Bhojaraju, Chandrasekhar and Ouellet-Plamondon, Claudiane M.},\nvolume = {33},\nnumber = {10},\nyear = {2021},\nissn = {08991561},\nabstract = {<div data-language="eng" data-ev-field="abstract">Improved autogenous healing capacity of concrete using superabsorbent polymers (SAPs) was used as an efficient approach for mitigating damage between steel rebar and self-consolidating concrete (SCC). The results for normal concrete (NC) and those for SCC mixtures were compared. Two SAPs with different particle sizes and chemical compositions were used in the experimental program. Results showed that despite the greater reduction effect of SAP with a smaller particle size on compressive strength, SCC containing this type of SAP had the highest bond strength in uncracked specimens, compared with SAP with larger particle sizes, for SAP-modified NC and SCC mixtures. Moreover, results showed that SCC and NC containing SAP had considerably greater healing improvement factors for large crack widths (w≥0.30 mm) compared with mixtures without polymers; almost 46%, 30%, and 24% healing improvement factors were obtained for average bond stress, bond strength, and residual bond stress of SAP-containing concrete mixtures, respectively. Furthermore, complete strength recovery (100% healing improvement factor) was obtained for SCC mixture with w=0.10 mm after a 28-day healing period.<br/></div> © 2021 American Society of Civil Engineers.},\nkey = {Self-healing materials},\n%keywords = {Compressive strength;Mixtures;Bond strength (materials);Particle size;Concrete mixtures;},\n%note = {Chemical compositions;Different particle sizes;Experimental program;Improvement factors;Larger particle sizes;Self-consolidating concrete;Strength recovery;Superabsorbent polymer;},\nURL = {http://dx.doi.org/10.1061/(ASCE)MT.1943-5533.0003881},\n} \n\n\n
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Improved autogenous healing capacity of concrete using superabsorbent polymers (SAPs) was used as an efficient approach for mitigating damage between steel rebar and self-consolidating concrete (SCC). The results for normal concrete (NC) and those for SCC mixtures were compared. Two SAPs with different particle sizes and chemical compositions were used in the experimental program. Results showed that despite the greater reduction effect of SAP with a smaller particle size on compressive strength, SCC containing this type of SAP had the highest bond strength in uncracked specimens, compared with SAP with larger particle sizes, for SAP-modified NC and SCC mixtures. Moreover, results showed that SCC and NC containing SAP had considerably greater healing improvement factors for large crack widths (w≥0.30 mm) compared with mixtures without polymers; almost 46%, 30%, and 24% healing improvement factors were obtained for average bond stress, bond strength, and residual bond stress of SAP-containing concrete mixtures, respectively. Furthermore, complete strength recovery (100% healing improvement factor) was obtained for SCC mixture with w=0.10 mm after a 28-day healing period.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Analytical and numerical investigation of natural rubber bearings incorporating U-shaped dampers behaviour for seismic isolation.\n \n \n \n \n\n\n \n Nguyen, X. D.; and Guizani, L.\n\n\n \n\n\n\n Engineering Structures, 243. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"AnalyticalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212510518947 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Analytical and numerical investigation of natural rubber bearings incorporating U-shaped dampers behaviour for seismic isolation},\njournal = {Engineering Structures},\nauthor = {Nguyen, Xuan Dai and Guizani, Lotfi},\nvolume = {243},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Although Natural Rubber Bearings (NRBs) constitute a reliable and cost-effective conventional bearing system, they are rarely used for seismic isolation because of their low damping. There are various seismic isolation systems based on NRB, but they mostly have multiple drawbacks (cost, capacity, environmental, etc.). The U-shaped damper (UD) is an efficient energy dissipating device used in seismic-resistant design. However, no guidelines or procedures are available to understand its behaviour nor for design purposes. This paper presents an analytical and numerical investigation of the cyclic behaviour of the NRB system combined with UDs that allow to increase the systems’ damping capacity and seismic performance. An analytical study of the UD is performed to predict its initial elastic parameters and numerical models are developed to study the nonlinear behaviour of the NRB-UDs, under large cyclic loadings. A set of UDs and NRBs subjected to cyclic loadings are then studied to investigate their behaviour and the effect of different geometric, loading and design parameters. Results show that the UD significantly dissipates vibration energy based on its large plastic deformations and achieves comparable and predictable performances corresponding to the in-plane and out-of-plane loading directions. Its cyclic behaviour depends on geometrical parameters and material yield stress. The developed analytical formulas provide a reliable estimation of initial elastic parameters of UD, which is essential for the selection and sizing of preliminary designs of the devices. The NRB-UDs systems show a high energy dissipation capacity with stable hysteresis behaviours in any direction. Further, the performance of these devices can be easily adjusted by varying the geometry, number and cross-section of UDs, making them an effective solution that meets a wide range of seismic isolation design requirements in high and moderate seismic areas.<br/></div> © 2021 Elsevier Ltd},\nkey = {Yield stress},\n%keywords = {Rubber;Bearings (structural);Geometry;Seismology;Seismic design;Elasticity;Damping;Nonmetallic bearings;Cost effectiveness;Cyclic loads;Energy dissipation;},\n%note = {Analytical investigations;Bearing systems;Energy dissipation capacities;Improved natural rubber bearing seismic isolation;Natural rubber bearing;Numerical investigations;Seismic isolation;U-shaped;U-shaped damper;Yielding metallic damper;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.112647},\n} \n\n\n
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Although Natural Rubber Bearings (NRBs) constitute a reliable and cost-effective conventional bearing system, they are rarely used for seismic isolation because of their low damping. There are various seismic isolation systems based on NRB, but they mostly have multiple drawbacks (cost, capacity, environmental, etc.). The U-shaped damper (UD) is an efficient energy dissipating device used in seismic-resistant design. However, no guidelines or procedures are available to understand its behaviour nor for design purposes. This paper presents an analytical and numerical investigation of the cyclic behaviour of the NRB system combined with UDs that allow to increase the systems’ damping capacity and seismic performance. An analytical study of the UD is performed to predict its initial elastic parameters and numerical models are developed to study the nonlinear behaviour of the NRB-UDs, under large cyclic loadings. A set of UDs and NRBs subjected to cyclic loadings are then studied to investigate their behaviour and the effect of different geometric, loading and design parameters. Results show that the UD significantly dissipates vibration energy based on its large plastic deformations and achieves comparable and predictable performances corresponding to the in-plane and out-of-plane loading directions. Its cyclic behaviour depends on geometrical parameters and material yield stress. The developed analytical formulas provide a reliable estimation of initial elastic parameters of UD, which is essential for the selection and sizing of preliminary designs of the devices. The NRB-UDs systems show a high energy dissipation capacity with stable hysteresis behaviours in any direction. Further, the performance of these devices can be easily adjusted by varying the geometry, number and cross-section of UDs, making them an effective solution that meets a wide range of seismic isolation design requirements in high and moderate seismic areas.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Conventional I-shape brace member bolted connections under seismic loading: Laboratory study.\n \n \n \n \n\n\n \n Rudman, A.; Tremblay, R.; and Rogers, C. A.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 184. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ConventionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212410508056 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Conventional I-shape brace member bolted connections under seismic loading: Laboratory study},\njournal = {Journal of Constructional Steel Research},\nauthor = {Rudman, Alina and Tremblay, Robert and Rogers, Colin A.},\nvolume = {184},\nyear = {2021},\nissn = {0143974X},\nabstract = {<div data-language="eng" data-ev-field="abstract">In many regions of the world, a conventional low-ductility concentrically braced frame (CBF) is commonly chosen as the seismic force resisting system. The energy dissipation is not restricted to yielding and buckling of the braces, as would be required for ductile braced frames; rather, energy dissipation is assumed to occur through localised yielding and friction in connections, as well as limited member yielding. The objective of this study was to characterize by means of laboratory testing the inelastic response of full-scale conventional I-shape braces and their bolted connections under reversed-cyclic seismic loading. Six brace specimens comprising two commonly used bolted connection types, flange plate and flange angle, were designed following the Type CC provisions prescribed by CSA S16. The brace specimens achieved storey drift ratios of 1%–2%, due to inelastic deformations in both the braces and the connections, even though capacity based design provisions were not incorporated in their design. Energy dissipation resulted from overall and local brace buckling, gusset plate buckling, tension yielding of flange plates, angles and gusset plates, block shear failure of brace webs and angles, bolt fracture and fracture of the gusset plates, along with bolt slip. However, the observed performance of these braces and connections in this laboratory based study is not necessarily guaranteed to be replicated for all conventional CBF designs due to the conservative nature and variability in accuracy of the existing CSA S16 design equations that were relied upon to design and detail the test specimens.<br/></div> © 2021 Elsevier Ltd},\nkey = {Energy dissipation},\n%keywords = {Bolts;Laboratories;Buckling;Seismology;Ductility;Steel testing;Structural frames;Flanges;},\n%note = {Bolted connections;Concentrically braced frames;Conventional constructions;Energy;Flange plates;Gusset plates;Laboratory studies;Laboratory testing;Seismic loadings;Steel braces;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2021.106795},\n} \n\n\n
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In many regions of the world, a conventional low-ductility concentrically braced frame (CBF) is commonly chosen as the seismic force resisting system. The energy dissipation is not restricted to yielding and buckling of the braces, as would be required for ductile braced frames; rather, energy dissipation is assumed to occur through localised yielding and friction in connections, as well as limited member yielding. The objective of this study was to characterize by means of laboratory testing the inelastic response of full-scale conventional I-shape braces and their bolted connections under reversed-cyclic seismic loading. Six brace specimens comprising two commonly used bolted connection types, flange plate and flange angle, were designed following the Type CC provisions prescribed by CSA S16. The brace specimens achieved storey drift ratios of 1%–2%, due to inelastic deformations in both the braces and the connections, even though capacity based design provisions were not incorporated in their design. Energy dissipation resulted from overall and local brace buckling, gusset plate buckling, tension yielding of flange plates, angles and gusset plates, block shear failure of brace webs and angles, bolt fracture and fracture of the gusset plates, along with bolt slip. However, the observed performance of these braces and connections in this laboratory based study is not necessarily guaranteed to be replicated for all conventional CBF designs due to the conservative nature and variability in accuracy of the existing CSA S16 design equations that were relied upon to design and detail the test specimens.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Attributional and consequential life cycle assessments in a circular economy with integration of a quality indicator: A case study of cascading wood products.\n \n \n \n \n\n\n \n Tanguay, X.; Essoua Essoua, G. G.; and Amor, B.\n\n\n \n\n\n\n Journal of Industrial Ecology, 25(6): 1462 - 1473. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"AttributionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213110704531 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Attributional and consequential life cycle assessments in a circular economy with integration of a quality indicator: A case study of cascading wood products},\njournal = {Journal of Industrial Ecology},\nauthor = {Tanguay, Xavier and Essoua Essoua, Gatien Geraud and Amor, Ben},\nvolume = {25},\nnumber = {6},\nyear = {2021},\npages = {1462 - 1473},\nissn = {10881980},\nabstract = {<div data-language="eng" data-ev-field="abstract">The growing popularity of the concepts of circular economy and resource cascade has intensified the need for consistent handling of multifunctionality-related challenges when modeling multiple cycles in life cycle assessment (LCA). In LCA, end-of-life upcycling and downcycling effects (also known as quality changes), triggered by the presence of multiple life cycles, have only recently begun to be studied from a consequential perspective, and no studies exist investigating attributional aspects. In this paper, a novel approach that considers quality in attributional LCA is proposed. The attributional, cut-off, open loop, and proposed approaches are compared in the form of a cascading case study. The implications of integrating quality in both perspectives are contrasted by modeling the same case study under a consequential perspective. By performing sensitivity analysis on the quality parameters in attributional LCA, we found that the integration of quality influences the results of the proposed approach by up to 15%. In the case of consequential LCA, the implementation of quality yields an influence between 97% and 138% of the results for each unit variation of quality. Comparison between the two perspectives of quality shows the same trend of supporting high-quality cascades. However, the attributional perspective of quality accomplishes this by redistributing impacts, while the consequential perspective affects the external benefits generated by the cascade. Considering the influence of quality on the results of both perspectives, future work should focus on establishing the technical or economic properties that would allow for practical use of quality in various circular economy and resource cascade applications.<br/></div> © 2021 by Yale University},\nkey = {Life cycle},\n%keywords = {Industrial economics;Sensitivity analysis;},\n%note = {Attributional LCA;Consequential LCA;Consequential life-cycle assessment;External benefits;Life Cycle Assessment (LCA);Multifunctionality;Quality indicators;Quality parameters;},\nURL = {http://dx.doi.org/10.1111/jiec.13167},\n} \n\n\n
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The growing popularity of the concepts of circular economy and resource cascade has intensified the need for consistent handling of multifunctionality-related challenges when modeling multiple cycles in life cycle assessment (LCA). In LCA, end-of-life upcycling and downcycling effects (also known as quality changes), triggered by the presence of multiple life cycles, have only recently begun to be studied from a consequential perspective, and no studies exist investigating attributional aspects. In this paper, a novel approach that considers quality in attributional LCA is proposed. The attributional, cut-off, open loop, and proposed approaches are compared in the form of a cascading case study. The implications of integrating quality in both perspectives are contrasted by modeling the same case study under a consequential perspective. By performing sensitivity analysis on the quality parameters in attributional LCA, we found that the integration of quality influences the results of the proposed approach by up to 15%. In the case of consequential LCA, the implementation of quality yields an influence between 97% and 138% of the results for each unit variation of quality. Comparison between the two perspectives of quality shows the same trend of supporting high-quality cascades. However, the attributional perspective of quality accomplishes this by redistributing impacts, while the consequential perspective affects the external benefits generated by the cascade. Considering the influence of quality on the results of both perspectives, future work should focus on establishing the technical or economic properties that would allow for practical use of quality in various circular economy and resource cascade applications.
© 2021 by Yale University\n
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\n \n\n \n \n \n \n \n \n Strategies for mitigating plastic wastes management problem: A lifecycle assessment study in Hong Kong.\n \n \n \n \n\n\n \n Hossain, M. U.; Ng, S. T.; Dong, Y.; and Amor, B.\n\n\n \n\n\n\n Waste Management, 131: 412 - 422. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"StrategiesPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212810624503 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Strategies for mitigating plastic wastes management problem: A lifecycle assessment study in Hong Kong},\njournal = {Waste Management},\nauthor = {Hossain, Md. Uzzal and Ng, S. Thomas and Dong, Yahong and Amor, Ben},\nvolume = {131},\nyear = {2021},\npages = {412 - 422},\nissn = {0956053X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Considering the volume of plastic generation and its persistence in nature, the management of plastic wastes has gained increasing attention globally. To select the most environmentally sustainable solution, insights in the environmental impacts of different management strategies are crucial. This study thus aimed to evaluate different plastic waste management strategies such as mechanical recycling, incineration, industrial incineration, construction and landfill, and exemplified with potential case demonstrations in Hong Kong. The environmental impacts of the developed strategies are comparatively evaluated by the lifecycle assessment (LCA) technique in order to identify the most environmentally preferable strategy. The LCA results indicate that industrial incineration is the most potential preferential strategy for Hong Kong, as it can potentially consume the generated waste locally and substitute the imported coal for the cement industry. Mechanical recycling is the second preferential strategy for the city, as it conserves secondary resources significantly. Grate incineration for generating electricity is the third preferable solution, while the use of recycled plastics in construction may not be a benign environmental strategy for Hong Kong. The findings of this study could help policy makers to design strategic direction for environmentally sustainable management of plastic wastes locally based on the circular economy principle.<br/></div> © 2021 Elsevier Ltd},\nkey = {Life cycle},\n%keywords = {Environmental impact;Coal industry;Environmental management;Waste management;Cement industry;Waste incineration;Sustainable development;},\n%note = {Assessment technique;Hong-kong;Life Cycle Assessment (LCA);Management problems;Management strategies;Mechanical recycling;Plastics waste;Potential strategy;Sustainable solution;Waste management strategies;},\nURL = {http://dx.doi.org/10.1016/j.wasman.2021.06.030},\n} \n\n\n
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Considering the volume of plastic generation and its persistence in nature, the management of plastic wastes has gained increasing attention globally. To select the most environmentally sustainable solution, insights in the environmental impacts of different management strategies are crucial. This study thus aimed to evaluate different plastic waste management strategies such as mechanical recycling, incineration, industrial incineration, construction and landfill, and exemplified with potential case demonstrations in Hong Kong. The environmental impacts of the developed strategies are comparatively evaluated by the lifecycle assessment (LCA) technique in order to identify the most environmentally preferable strategy. The LCA results indicate that industrial incineration is the most potential preferential strategy for Hong Kong, as it can potentially consume the generated waste locally and substitute the imported coal for the cement industry. Mechanical recycling is the second preferential strategy for the city, as it conserves secondary resources significantly. Grate incineration for generating electricity is the third preferable solution, while the use of recycled plastics in construction may not be a benign environmental strategy for Hong Kong. The findings of this study could help policy makers to design strategic direction for environmentally sustainable management of plastic wastes locally based on the circular economy principle.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Hybrid testing of capacity designed RC structural walls for the determination of nonlinear seismic shear amplification.\n \n \n \n \n\n\n \n Fatemi, H.; Lamarche, C.; and Paultre, P.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 50(12): 3266 - 3287. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"HybridPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212710589884 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Hybrid testing of capacity designed RC structural walls for the determination of nonlinear seismic shear amplification},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Fatemi, Hassan and Lamarche, Charles-Philippe and Paultre, Patrick},\nvolume = {50},\nnumber = {12},\nyear = {2021},\npages = {3266 - 3287},\nissn = {00988847},\nabstract = {<div data-language="eng" data-ev-field="abstract">Hybrid testing is an effective experimental method to study the dynamic behavior of structural elements under various types of loads. The hybrid testing method enables the seismic responses of large structural elements to be reproduced, such as the responses of reinforced concrete (RC) shear walls in a laboratory environment without needing to include the large masses typically encountered in multistory buildings. In this study, a test specimen corresponding to the base plastic hinge zone of an eight-story RC structural wall was tested in a laboratory environment, whereas the remainder of the wall was modeled numerically to evaluate the seismic shear amplification due to nonlinear higher mode effects. A method is presented for controlling three degrees of freedom of a specimen with high axial stiffness and high lateral stiffness at the beginning of the test and the substantially reduced stiffness after cracking and yielding of the specimen. Because the duration of an uninterrupted test would have been very long, a method was used to stop and restart the test at will so that the whole test could be performed over several days. Seismic shear amplification due to nonlinear higher mode effects in a structural wall with yielding occurring at the base is measured for the first time in a hybrid test. The test results clearly present seismic shear amplification that is larger than building codes recommended values.<br/></div> © 2021 John Wiley & Sons Ltd.},\nkey = {Displacement control},\n%keywords = {Degrees of freedom (mechanics);Walls (structural partitions);Reinforced concrete;Seismology;Shear flow;Testing;Stiffness;},\n%note = {Experimental methods;Higher-mode effects;Laboratory environment;Multistory building;Plastic hinge zones;Shear amplification;Structural elements;Three degrees of freedom;},\nURL = {http://dx.doi.org/10.1002/eqe.3509},\n} \n\n\n
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Hybrid testing is an effective experimental method to study the dynamic behavior of structural elements under various types of loads. The hybrid testing method enables the seismic responses of large structural elements to be reproduced, such as the responses of reinforced concrete (RC) shear walls in a laboratory environment without needing to include the large masses typically encountered in multistory buildings. In this study, a test specimen corresponding to the base plastic hinge zone of an eight-story RC structural wall was tested in a laboratory environment, whereas the remainder of the wall was modeled numerically to evaluate the seismic shear amplification due to nonlinear higher mode effects. A method is presented for controlling three degrees of freedom of a specimen with high axial stiffness and high lateral stiffness at the beginning of the test and the substantially reduced stiffness after cracking and yielding of the specimen. Because the duration of an uninterrupted test would have been very long, a method was used to stop and restart the test at will so that the whole test could be performed over several days. Seismic shear amplification due to nonlinear higher mode effects in a structural wall with yielding occurring at the base is measured for the first time in a hybrid test. The test results clearly present seismic shear amplification that is larger than building codes recommended values.
© 2021 John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Effective stiffness and period-dependent seismic response modification factors for flexure-dominated fully-grouted reinforced masonry rectangular shear walls.\n \n \n \n \n\n\n \n Hamzeh, L.; Ashour, A.; Aly, N.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 243. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EffectivePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212710596168 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effective stiffness and period-dependent seismic response modification factors for flexure-dominated fully-grouted reinforced masonry rectangular shear walls},\njournal = {Engineering Structures},\nauthor = {Hamzeh, Layane and Ashour, Ahmed and Aly, Nader and Galal, Khaled},\nvolume = {243},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">The wall effective elastic stiffness, displacement ductility, and seismic force modification factors are important force-based seismic design (FBD) parameters for reinforced masonry (RM) shear walls. The effective stiffness, k<inf>e</inf> of reinforced masonry shear walls (RMSW) is crucial in computing the natural period and thus the elastic forces, and essential also in computing the displacements corresponding to the design seismic forces. This study analyzes previously reported test results of forty-three flexure-dominated fully-grouted rectangular RMSWs subjected to quasi-static cyclic load to evaluate the FBD parameters adopted by Canadian and American standards. In this study, based on the experimental results of 43 tested walls, a new stiffness reduction factor is proposed considering the effect of axial stress, vertical reinforcement ratio, and horizontal reinforcement ratio. Moreover, the seismic force modification factors are compared to the Canadian and US codes. The results showed that ductility related reduction factors should be dependent on the wall natural frequency and there is a room to relax the current proposed code values. In addition, incremental dynamic analysis was performed using a simplified numerical model to study the effect of dynamic loading on response modification factors and stiffness characteristics of the walls.<br/></div> © 2021 Elsevier Ltd},\nkey = {Ductility},\n%keywords = {Mortar;Reinforcement;Concrete construction;Seismic design;Seismology;Shear walls;Stiffness;Dynamic loads;Grouting;},\n%note = {Design parameters;Dynamic loadings;Effective stiffness;Flexure-dominated;Force based seismic design;Masonry shear walls;Reinforced masonry;Reinforcement ratios;Response modification factors;Seismic force modification factor;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.112566},\n} \n\n\n
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The wall effective elastic stiffness, displacement ductility, and seismic force modification factors are important force-based seismic design (FBD) parameters for reinforced masonry (RM) shear walls. The effective stiffness, ke of reinforced masonry shear walls (RMSW) is crucial in computing the natural period and thus the elastic forces, and essential also in computing the displacements corresponding to the design seismic forces. This study analyzes previously reported test results of forty-three flexure-dominated fully-grouted rectangular RMSWs subjected to quasi-static cyclic load to evaluate the FBD parameters adopted by Canadian and American standards. In this study, based on the experimental results of 43 tested walls, a new stiffness reduction factor is proposed considering the effect of axial stress, vertical reinforcement ratio, and horizontal reinforcement ratio. Moreover, the seismic force modification factors are compared to the Canadian and US codes. The results showed that ductility related reduction factors should be dependent on the wall natural frequency and there is a room to relax the current proposed code values. In addition, incremental dynamic analysis was performed using a simplified numerical model to study the effect of dynamic loading on response modification factors and stiffness characteristics of the walls.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Active Simulation of Transient Wind Field in a Multiple-Fan Wind Tunnel via Deep Reinforcement Learning.\n \n \n \n \n\n\n \n Li, S.; Snaiki, R.; and Wu, T.\n\n\n \n\n\n\n Journal of Engineering Mechanics, 147(9). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ActivePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212810615951 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Active Simulation of Transient Wind Field in a Multiple-Fan Wind Tunnel via Deep Reinforcement Learning},\njournal = {Journal of Engineering Mechanics},\nauthor = {Li, Shaopeng and Snaiki, Reda and Wu, Teng},\nvolume = {147},\nnumber = {9},\nyear = {2021},\nissn = {07339399},\nabstract = {<div data-language="eng" data-ev-field="abstract">The transient wind field during a nonsynoptic wind event (e.g., thunderstorm downburst) presents time-varying mean and nonstationary fluctuating components, and hence is not easy to be reproduced in a conventional boundary-layer wind tunnel with various passive devices (e.g., spires, roughness elements, and barriers). As a promising alternative, the actively controlled multiple-fan wind tunnel has emerged to effectively generate the laboratory-scale, spatiotemporally varying wind flows. The tracking accuracy of target wind speed histories at selected locations in the multiple-fan wind tunnel depends on the control signals input to individual fans. Conventional hand-design linear control schemes cannot ensure good performance due to the complicated fluid dynamics and nonlinear interactions inside the wind tunnel. In addition, the determination of the control parameters involves a time-consuming manual tuning process. In this paper, an accurate and efficient control scheme based on deep reinforcement learning (RL) is developed to realize the prescribed spatiotemporally varying wind field in a multiple-fan wind tunnel. Specifically, the fully connected deep neural network (DNN) is trained using RL methodology to perform active flow control in the multiple-fan wind tunnel. Accordingly, the optimal parameters (network weights) of the DNN-based nonlinear controller are obtained based on an automated trial-and-error process. The controller complexity needed for active simulation of transient winds can be well captured by a DNN due to its powerful function approximation ability, and the "model-free"and "automation"features of RL paradigm eliminate the need of expensive modeling of fluid dynamics and costly hand tuning of control parameters. Numerical results of the transient winds during a moving downburst event (including nose-shape vertical profiles, time-varying mean wind speeds, and nonstationary fluctuations) present good performance of the proposed deep RL-based control strategy in a simulation environment of the multiple-fan wind tunnel at the University at Buffalo.<br/></div> © 2021 American Society of Civil Engineers.},\nkey = {Wind},\n%keywords = {Process control;Boundary layers;Learning systems;Reinforcement learning;Wind tunnels;Controllers;Deep neural networks;Linear control systems;Tuning;},\n%note = {Active flow control;Boundary layer wind tunnel;Fluctuating components;Non-linear controllers;Nonlinear interactions;Simulation environment;Thunderstorm downburst;Trial-and-error process;},\nURL = {http://dx.doi.org/10.1061/(ASCE)EM.1943-7889.0001967},\n} \n\n\n
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The transient wind field during a nonsynoptic wind event (e.g., thunderstorm downburst) presents time-varying mean and nonstationary fluctuating components, and hence is not easy to be reproduced in a conventional boundary-layer wind tunnel with various passive devices (e.g., spires, roughness elements, and barriers). As a promising alternative, the actively controlled multiple-fan wind tunnel has emerged to effectively generate the laboratory-scale, spatiotemporally varying wind flows. The tracking accuracy of target wind speed histories at selected locations in the multiple-fan wind tunnel depends on the control signals input to individual fans. Conventional hand-design linear control schemes cannot ensure good performance due to the complicated fluid dynamics and nonlinear interactions inside the wind tunnel. In addition, the determination of the control parameters involves a time-consuming manual tuning process. In this paper, an accurate and efficient control scheme based on deep reinforcement learning (RL) is developed to realize the prescribed spatiotemporally varying wind field in a multiple-fan wind tunnel. Specifically, the fully connected deep neural network (DNN) is trained using RL methodology to perform active flow control in the multiple-fan wind tunnel. Accordingly, the optimal parameters (network weights) of the DNN-based nonlinear controller are obtained based on an automated trial-and-error process. The controller complexity needed for active simulation of transient winds can be well captured by a DNN due to its powerful function approximation ability, and the \"model-free\"and \"automation\"features of RL paradigm eliminate the need of expensive modeling of fluid dynamics and costly hand tuning of control parameters. Numerical results of the transient winds during a moving downburst event (including nose-shape vertical profiles, time-varying mean wind speeds, and nonstationary fluctuations) present good performance of the proposed deep RL-based control strategy in a simulation environment of the multiple-fan wind tunnel at the University at Buffalo.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n A Macro-Distinct Element Model (M-DEM) for out-of-plane analysis of unreinforced masonry structures.\n \n \n \n \n\n\n \n Malomo, D.; and DeJong, M.\n\n\n \n\n\n\n Engineering Structures, 244. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212710586974 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Macro-Distinct Element Model (M-DEM) for out-of-plane analysis of unreinforced masonry structures},\njournal = {Engineering Structures},\nauthor = {Malomo, D. and DeJong, M.J.},\nvolume = {244},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Despite the vulnerability of unreinforced masonry (URM) structures to out-of-plane (OOP) loading, computational methods that can efficiently simulate OOP failure at the building scale are still limited. Current methods typically rely on simplified static analysis approaches or refined micro-modeling techniques that entail high computational expense, thus limiting their employment to reduced-scale and local problems. With a view to overcome these issues, a novel Finite-Distinct macroelement model which combines the efficiency of simplified modeling strategies with the multifaceted capabilities of discontinuum-based methods, is developed and implemented in the framework of the Distinct Element Method (DEM). Shear and flexural failure modes, either in-plane or out-of-plane, are accounted for by zero-thickness interface spring layers, whose layout is determined a priori as a function of the considered masonry bond pattern. Meanwhile, crushing failure is modeled through homogenized Finite Element macro-blocks. The proposed discretization scheme is conceived so that the model can also be used to simulate in-plane damage, for which the model has already been validated. Simplified expressions are proposed for determining equivalent mechanical properties of the interface spring layers, depending on their inclination. Similarly, analytically-based equations are used to significantly reduce the number of springs needed to adequately reproduce the OOP bending response at the joint level. Numerical simulations are compared to previous experimental quasi-static and dynamic tests on both brick and block URM components, characterized by markedly different vertical pressures, aspect ratios, boundary conditions and confinement; both one-way and two-way bending actions are considered. The results indicate that the model can satisfactorily reproduce the measured load–displacement curves in a reasonable timeframe, as well as the experimentally-observed failure mechanisms.<br/></div> © 2021 Elsevier Ltd},\nkey = {Aspect ratio},\n%keywords = {Masonry materials;Failure (mechanical);},\n%note = {Confined masonry;Distinct element modeling;Finite-distinct element method;Interface springs;Macro element;Out-of-plane;Out-of-plane failures;Out-of-plane loading;Unreinforced masonry;Unreinforced masonry structures;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.112754},\n} \n\n\n
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Despite the vulnerability of unreinforced masonry (URM) structures to out-of-plane (OOP) loading, computational methods that can efficiently simulate OOP failure at the building scale are still limited. Current methods typically rely on simplified static analysis approaches or refined micro-modeling techniques that entail high computational expense, thus limiting their employment to reduced-scale and local problems. With a view to overcome these issues, a novel Finite-Distinct macroelement model which combines the efficiency of simplified modeling strategies with the multifaceted capabilities of discontinuum-based methods, is developed and implemented in the framework of the Distinct Element Method (DEM). Shear and flexural failure modes, either in-plane or out-of-plane, are accounted for by zero-thickness interface spring layers, whose layout is determined a priori as a function of the considered masonry bond pattern. Meanwhile, crushing failure is modeled through homogenized Finite Element macro-blocks. The proposed discretization scheme is conceived so that the model can also be used to simulate in-plane damage, for which the model has already been validated. Simplified expressions are proposed for determining equivalent mechanical properties of the interface spring layers, depending on their inclination. Similarly, analytically-based equations are used to significantly reduce the number of springs needed to adequately reproduce the OOP bending response at the joint level. Numerical simulations are compared to previous experimental quasi-static and dynamic tests on both brick and block URM components, characterized by markedly different vertical pressures, aspect ratios, boundary conditions and confinement; both one-way and two-way bending actions are considered. The results indicate that the model can satisfactorily reproduce the measured load–displacement curves in a reasonable timeframe, as well as the experimentally-observed failure mechanisms.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Economic and environmental life cycle assessment of a short-span aluminium composite bridge deck in Canada.\n \n \n \n \n\n\n \n Pedneault, J.; Desjardins, V.; Margni, M.; Conciatori, D.; Fafard, M.; and Sorelli, L.\n\n\n \n\n\n\n Journal of Cleaner Production, 310. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EconomicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212210442958 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Economic and environmental life cycle assessment of a short-span aluminium composite bridge deck in Canada},\njournal = {Journal of Cleaner Production},\nauthor = {Pedneault, Julien and Desjardins, Victor and Margni, Manuele and Conciatori, David and Fafard, Mario and Sorelli, Luca},\nvolume = {310},\nyear = {2021},\nissn = {09596526},\nabstract = {<div data-language="eng" data-ev-field="abstract">The costs to maintain Québec's infrastructure—most of which was built in the 1960s and 1970s—are considerable, and major maintenance and reconstruction will be required in the coming years. In recent years, aluminum associations promote the increase of aluminum use in infrastructure and especially in bridge construction. This research aims to investigate the advantages of using aluminum deck bridges, which require less maintenance than traditional materials due to the natural resistance to atmospheric corrosion of aluminum, despite their higher investment costs that may limit their deployment. More specifically, the study compares for the first time the life cycle costs and environmental impacts of an aluminum-steel composite deck with a more traditional concrete-steel composite deck and provides a parametrized model allowing practitioners and designers to perform screening life cycle assessment and cost of short span bridge based on our data and results. Results show that the initial cost of aluminum deck is double that of concrete deck, but the overall cost is actually four times lower over the entire life cycle. The environmental results demonstrate the benefits of aluminum deck. Our main recommendation for future decision making in road infrastructure management is therefore to systematically expand the scope of the analysis integrating a full life cycle thinking also including the effects from traffic diversion.<br/></div> © 2021 Elsevier Ltd},\nkey = {Life cycle},\n%keywords = {Atmospheric corrosion;Corrosion resistance;Steel corrosion;Investments;Bridge decks;Decision making;Environmental impact;Aluminum corrosion;Cost benefit analysis;},\n%note = {Aluminum composites;Aluminum-steel composite bridge;Bridge constructions;Composite bridge decks;Composite decks;Economic life cycle assessment;Environmental life cycle assessment;Life cycle costs analysis;Steel composites;Steel-concrete composite bridges;},\nURL = {http://dx.doi.org/10.1016/j.jclepro.2021.127405},\n} \n\n\n
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The costs to maintain Québec's infrastructure—most of which was built in the 1960s and 1970s—are considerable, and major maintenance and reconstruction will be required in the coming years. In recent years, aluminum associations promote the increase of aluminum use in infrastructure and especially in bridge construction. This research aims to investigate the advantages of using aluminum deck bridges, which require less maintenance than traditional materials due to the natural resistance to atmospheric corrosion of aluminum, despite their higher investment costs that may limit their deployment. More specifically, the study compares for the first time the life cycle costs and environmental impacts of an aluminum-steel composite deck with a more traditional concrete-steel composite deck and provides a parametrized model allowing practitioners and designers to perform screening life cycle assessment and cost of short span bridge based on our data and results. Results show that the initial cost of aluminum deck is double that of concrete deck, but the overall cost is actually four times lower over the entire life cycle. The environmental results demonstrate the benefits of aluminum deck. Our main recommendation for future decision making in road infrastructure management is therefore to systematically expand the scope of the analysis integrating a full life cycle thinking also including the effects from traffic diversion.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Probabilistic Seismic Response and Capacity Models of Piles for Statewide Bridges in California.\n \n \n \n \n\n\n \n Xie, Y.; Zheng, Q.; Roblee, C.; Yang, C. W.; Padgett, J. E.; and Desroches, R.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 147(9). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ProbabilisticPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212710589916 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Probabilistic Seismic Response and Capacity Models of Piles for Statewide Bridges in California},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Xie, Yazhou and Zheng, Qiu and Roblee, Cliff and Yang, Chuang-Sheng Walter and Padgett, Jamie E. and Desroches, Reginald},\nvolume = {147},\nnumber = {9},\nyear = {2021},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study develops the probabilistic seismic response and capacity models for the broad collection of standard pile designs that are routinely incorporated into bridges in California. A review of the state bridge inventory indicates considerable variations in design details for different standard pile types used across multiple eras. For each pile type, fiber-section-based pile models attached with p-y soil springs are built to incorporate nonlinear behaviors of soil materials, a wide array of heterogeneous soil profiles, full-range damage states of piles, and realistic connection details between piles and footings (i.e., pile caps). Moreover, force-displacement responses of pile-soil systems under a large number of pushover analyses are regressed as response models consisting of five parameters [termed as response five parameter (R5P) models], which can capture all essential behaviors of laterally-loaded piles. Capacity damage states and limit state models are defined for different pile types by linking pile global responses to fiber-scale material behaviors at plastic hinge locations. Procedures are further provided to expand R5P models to pile foundation models at the regional scale, taking into account the pile group effect and capacities of pile cap backfills. R5P models for all distinct pile types are further summarized in an Excel workbook to facilitate their practical implementations. In general, this study provides a comprehensive and consistent set of response and capacity models to quantify the seismic damage potential of regional pile foundations, as well as to capture their dynamic interplays with other crucial bridge components, such as columns and abutment components. The proposed pile models are expected to significantly enhance the existing modeling capability toward improved seismic risk assessment of California's bridge infrastructure.<br/></div> © 2021 American Society of Civil Engineers.},\nkey = {Piles},\n%keywords = {Risk assessment;Soils;Pile driving;Seismic response;Bridges;Pile foundations;Concretes;},\n%note = {Bridge infrastructure;Connection details;Force-displacement response;Heterogeneous soils;Laterally loaded pile;Nonlinear behavior;Push-over analysis;Seismic risk assessment;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0003085},\n} \n\n\n
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This study develops the probabilistic seismic response and capacity models for the broad collection of standard pile designs that are routinely incorporated into bridges in California. A review of the state bridge inventory indicates considerable variations in design details for different standard pile types used across multiple eras. For each pile type, fiber-section-based pile models attached with p-y soil springs are built to incorporate nonlinear behaviors of soil materials, a wide array of heterogeneous soil profiles, full-range damage states of piles, and realistic connection details between piles and footings (i.e., pile caps). Moreover, force-displacement responses of pile-soil systems under a large number of pushover analyses are regressed as response models consisting of five parameters [termed as response five parameter (R5P) models], which can capture all essential behaviors of laterally-loaded piles. Capacity damage states and limit state models are defined for different pile types by linking pile global responses to fiber-scale material behaviors at plastic hinge locations. Procedures are further provided to expand R5P models to pile foundation models at the regional scale, taking into account the pile group effect and capacities of pile cap backfills. R5P models for all distinct pile types are further summarized in an Excel workbook to facilitate their practical implementations. In general, this study provides a comprehensive and consistent set of response and capacity models to quantify the seismic damage potential of regional pile foundations, as well as to capture their dynamic interplays with other crucial bridge components, such as columns and abutment components. The proposed pile models are expected to significantly enhance the existing modeling capability toward improved seismic risk assessment of California's bridge infrastructure.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Urban exposure upstream fetch and its influence on the formulation of wind load provisions.\n \n \n \n \n\n\n \n Yu, J.; Li, M.; Stathopoulos, T.; Zhou, Q.; and Yu, X.\n\n\n \n\n\n\n Building and Environment, 203. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"UrbanPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212710588185 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Urban exposure upstream fetch and its influence on the formulation of wind load provisions},\njournal = {Building and Environment},\nauthor = {Yu, Jianhan and Li, Mingshui and Stathopoulos, Ted and Zhou, Qiang and Yu, Xiaoye},\nvolume = {203},\nyear = {2021},\nissn = {03601323},\nabstract = {<div data-language="eng" data-ev-field="abstract">With the rapid expansion of city area, concern has increased about the atmospheric boundary layer in urban area, which is influenced by the complex city morphology. This paper aims at providing a fundamental understanding of the influence of city upstream fetch length and exposure roughness on the mean velocity and turbulence intensity profiles. Wind tunnel tests of two real city models have been carried out. The results indicate that in urban areas mean velocity profiles are influenced by an upstream fetch length up to 750 m; and not influenced by the exposure morphology when the fetch length goes farther than 1250 m. Turbulence intensity profiles are more sensitive to upstream exposure and require longer upstream fetches to become steady. The evolution of mean velocity profiles of different fetch lengths and the influence of upstream roughness elements in the variation of turbulence intensity have been analyzed. The roughness length z<inf>0</inf> of Kowloon, Hong Kong is determined, and issues related to the specification of minimum upstream fetch in current wind load provisions are tackled.<br/></div> © 2021 Elsevier Ltd},\nkey = {Velocity},\n%keywords = {Turbulence;Aerodynamic loads;Wind tunnels;Atmospheric thermodynamics;Morphology;Wind stress;Atmospheric boundary layer;},\n%note = {Exposure roughness;Fetch length;Mean velocity profiles;Minimum upstream fetch;Rapid expansion;Roughness length;Turbulence intensity profiles;Urban areas;Urban exposure;Wind load provisions;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2021.108072},\n} \n\n\n
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With the rapid expansion of city area, concern has increased about the atmospheric boundary layer in urban area, which is influenced by the complex city morphology. This paper aims at providing a fundamental understanding of the influence of city upstream fetch length and exposure roughness on the mean velocity and turbulence intensity profiles. Wind tunnel tests of two real city models have been carried out. The results indicate that in urban areas mean velocity profiles are influenced by an upstream fetch length up to 750 m; and not influenced by the exposure morphology when the fetch length goes farther than 1250 m. Turbulence intensity profiles are more sensitive to upstream exposure and require longer upstream fetches to become steady. The evolution of mean velocity profiles of different fetch lengths and the influence of upstream roughness elements in the variation of turbulence intensity have been analyzed. The roughness length z0 of Kowloon, Hong Kong is determined, and issues related to the specification of minimum upstream fetch in current wind load provisions are tackled.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Experimental investigation of axial compressive behavior of square and rectangular confined concrete-masonry structural wall boundary elements.\n \n \n \n \n\n\n \n AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 243. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212610556726 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental investigation of axial compressive behavior of square and rectangular confined concrete-masonry structural wall boundary elements},\njournal = {Engineering Structures},\nauthor = {AbdelRahman, Belal and Galal, Khaled},\nvolume = {243},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Reinforced masonry boundary elements (RMBEs) are critical components in determining the lateral response of reinforced masonry structural walls with boundary elements. Fundamental interpretation of the effect of various influential parameters on the RMBEs′ behavior is essential to enhance their stress–strain response. This study investigates, experimentally, the influence of various design parameters and construction procedures on the axial compressive behavior of fully grouted RMBEs built with C-shaped concrete-masonry blocks. Thirty-eight unreinforced and RMBEs were constructed and tested under concentric axial loading till failure. The effect of five parameters, namely, the vertical reinforcement ratio, the volumetric ratio of confinement reinforcement, cross-section configuration, stack pattern and running-bond, and pre-wetting of dry masonry shell before grouting, was investigated. The test results showed that increasing the vertical reinforcement ratio of the RMBEs resulted in a significant increase in the peak compressive stress and a considerable reduction in the corresponding strain ductility. Moreover, as the RMBEs volumetric ratio of transverse reinforcement doubled, the strain ductility witnessed a remarkable enhancement, whereas the peak compressive stress experienced an inconsistent trend. RMBEs built with rectangular C-shaped cross-sections exhibited comparable peak stress, smaller drop following the face shell spalling, and better strain ductility than square RMBEs. The running-bond pattern had a negative effect on both the peak stress and the strain ductility of dry RMBEs, although it exhibited comparable or even enhanced response in wet RMBEs compared to those built in the stack pattern. Pre-wetting of dry masonry shell before grouting was found to boost the peak compressive stress of unreinforced and RMBEs significantly. However, it adversely affected their strain ductility. Wet RMBEs showed a steeper post-peak descending branch compared to their dry counterparts. Indeed, the vertical reinforcement ratio and pre-wetting of dry masonry shell were the most critical parameters affecting the RMBEs peak compressive stress, whereas the confinement ratio mostly influenced the strain ductility. This study sheds light on the most critical parameters influencing the stress–strain components (i.e., strength and ductility) of RMBEs.<br/></div> © 2021 Elsevier Ltd},\nkey = {Grouting},\n%keywords = {Compressive stress;Ductility;Mortar;Wetting;Reinforcement;Shells (structures);Shear walls;Concrete construction;},\n%note = {Boundary elements;Compressive behavior;Concrete masonry;Confinement;Hoop fracture;Pre-wetting;Reinforced masonry;Reinforcement ratios;Strain ductility;Vertical reinforcement;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.112584},\n} \n\n\n
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Reinforced masonry boundary elements (RMBEs) are critical components in determining the lateral response of reinforced masonry structural walls with boundary elements. Fundamental interpretation of the effect of various influential parameters on the RMBEs′ behavior is essential to enhance their stress–strain response. This study investigates, experimentally, the influence of various design parameters and construction procedures on the axial compressive behavior of fully grouted RMBEs built with C-shaped concrete-masonry blocks. Thirty-eight unreinforced and RMBEs were constructed and tested under concentric axial loading till failure. The effect of five parameters, namely, the vertical reinforcement ratio, the volumetric ratio of confinement reinforcement, cross-section configuration, stack pattern and running-bond, and pre-wetting of dry masonry shell before grouting, was investigated. The test results showed that increasing the vertical reinforcement ratio of the RMBEs resulted in a significant increase in the peak compressive stress and a considerable reduction in the corresponding strain ductility. Moreover, as the RMBEs volumetric ratio of transverse reinforcement doubled, the strain ductility witnessed a remarkable enhancement, whereas the peak compressive stress experienced an inconsistent trend. RMBEs built with rectangular C-shaped cross-sections exhibited comparable peak stress, smaller drop following the face shell spalling, and better strain ductility than square RMBEs. The running-bond pattern had a negative effect on both the peak stress and the strain ductility of dry RMBEs, although it exhibited comparable or even enhanced response in wet RMBEs compared to those built in the stack pattern. Pre-wetting of dry masonry shell before grouting was found to boost the peak compressive stress of unreinforced and RMBEs significantly. However, it adversely affected their strain ductility. Wet RMBEs showed a steeper post-peak descending branch compared to their dry counterparts. Indeed, the vertical reinforcement ratio and pre-wetting of dry masonry shell were the most critical parameters affecting the RMBEs peak compressive stress, whereas the confinement ratio mostly influenced the strain ductility. This study sheds light on the most critical parameters influencing the stress–strain components (i.e., strength and ductility) of RMBEs.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n On the Dynamic Soil Behavior under Triaxial and Simple Shear Modes.\n \n \n \n \n\n\n \n Khashila, M.; Hussien, M. N.; Chekired, M.; and Karray, M.\n\n\n \n\n\n\n International Journal of Geomechanics, 21(8). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"OnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212110412952 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {On the Dynamic Soil Behavior under Triaxial and Simple Shear Modes},\njournal = {International Journal of Geomechanics},\nauthor = {Khashila, Marwan and Hussien, Mahmoud N. and Chekired, Mohamed and Karray, Mourad},\nvolume = {21},\nnumber = {8},\nyear = {2021},\nissn = {15323641},\nabstract = {<div data-language="eng" data-ev-field="abstract">Although much has been discussed on the liquefaction phenomenon and cyclic behavior of saturated sands, relatively little has been clarified on the difference between their cyclic behavior under simple and triaxial shear modes, particularly under strain-controlled conditions. Thus, in this study, comparative cyclic strain-controlled simple (DSS and TxSS) and triaxial (CTX) shear tests were performed on reconstituted specimens of Baie-Saint-Paul and Ottawa C-109 sands. To indicate further investigation into the cyclic behavior under triaxial and simple shear modes, the CTX and TxSS tests were numerically simulated using a proposed energy-based pore-water pressure model through the FLAC3D platform. The outcomes of the numerical simulations were presented in terms of the stress-strain hysteresis loop and the distribution of the dissipated energy and excess pore-water pressure generation within each element of CTX and TxSS soil specimens. Unlike TxSS soil models that experience a relatively uniform stress state, the numerical simulation revealed the nonuniformity of the produced stress-strain and pore-water pressure within triaxial specimens. The comparative cyclic strain-controlled test results revealed that the DSS and TxSS specimens liquefy slower than triaxial specimens, in contrast to cyclic stress-controlled results found in the literature.<br/></div> © 2021 American Society of Civil Engineers.},\nkey = {Energy dissipation},\n%keywords = {Numerical models;Pressure distribution;Soil liquefaction;Soils;Pore pressure;Water;},\n%note = {Cyclic behavior;Dissipated energy;Excess pore water pressure;Pore water pressure model;Pore-water pressures;Reconstituted specimens;Strain-controlled;Stress-strain hysteresis loops;},\nURL = {http://dx.doi.org/10.1061/(ASCE)GM.1943-5622.0002085},\n} \n\n\n
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Although much has been discussed on the liquefaction phenomenon and cyclic behavior of saturated sands, relatively little has been clarified on the difference between their cyclic behavior under simple and triaxial shear modes, particularly under strain-controlled conditions. Thus, in this study, comparative cyclic strain-controlled simple (DSS and TxSS) and triaxial (CTX) shear tests were performed on reconstituted specimens of Baie-Saint-Paul and Ottawa C-109 sands. To indicate further investigation into the cyclic behavior under triaxial and simple shear modes, the CTX and TxSS tests were numerically simulated using a proposed energy-based pore-water pressure model through the FLAC3D platform. The outcomes of the numerical simulations were presented in terms of the stress-strain hysteresis loop and the distribution of the dissipated energy and excess pore-water pressure generation within each element of CTX and TxSS soil specimens. Unlike TxSS soil models that experience a relatively uniform stress state, the numerical simulation revealed the nonuniformity of the produced stress-strain and pore-water pressure within triaxial specimens. The comparative cyclic strain-controlled test results revealed that the DSS and TxSS specimens liquefy slower than triaxial specimens, in contrast to cyclic stress-controlled results found in the literature.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Seismic behaviour of multi-storey gravity-controlled rocking braced-frame buildings including floor vertical response.\n \n \n \n \n\n\n \n Mottier, P.; Tremblay, R.; and Rogers, C.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 182. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211910324324 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic behaviour of multi-storey gravity-controlled rocking braced-frame buildings including floor vertical response},\njournal = {Journal of Constructional Steel Research},\nauthor = {Mottier, Paul and Tremblay, Robert and Rogers, Colin},\nvolume = {182},\nyear = {2021},\nissn = {0143974X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Gravity-controlled rocking braced frames (G-CBRFs) are cost-effective low-damage self-centring lateral force resisting systems that allow the reduction of the seismic force demands in structures subjected to earthquakes, while relying only on the gravity loads they carry to ensure self-centring. Due to column uplift, significant masses are mobilized, thus activating vertical fundamental modes of vibration that affect the overall seismic behaviour of the structures. This article presents an examination of the seismic response of G-CBRF structures, including the response of the roof and floor framing systems. Twenty-two buildings were designed for this study, with various combinations of building heights (2-, 4-, and 8-storeys), building locations (eastern and western Canada), site classes (soil C and E), and location of the braced frame within the building (interior or exterior column lines). For each design, two framing configurations were studied, with secondary beams parallel or perpendicular to the braced frames. Non-linear response history analyses were performed using representative ground motions selected and scaled according to the National Building Code of Canada requirements. Effects of the vertical component of the ground motions and energy dissipated through friction in beam-to-column connections were also of focus. Incremental dynamic analyses were performed to generate fragility curves for collapse due to overturning of the studied structures. The results show that peak drifts can be accurately predicted. Peak axial loads in frame members are increased due to the vertical inertia forces induced upon rocking. The fragility curves show that acceptable margins against collapse by overturning is achieved for G-CRBFs.<br/></div> © 2021 Elsevier Ltd},\nkey = {Cost effectiveness},\n%keywords = {Floors;Gravitation;Seismic response;Structural frames;Buildings;Earthquakes;},\n%note = {Braced frame;Collapse assessment;Coupled braced frame;Fragility curves;Frame buildings;Ground-motion;Rocking;Seismic behaviour;Self centering;Steel braced frames;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2021.106665},\n} \n\n\n
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Gravity-controlled rocking braced frames (G-CBRFs) are cost-effective low-damage self-centring lateral force resisting systems that allow the reduction of the seismic force demands in structures subjected to earthquakes, while relying only on the gravity loads they carry to ensure self-centring. Due to column uplift, significant masses are mobilized, thus activating vertical fundamental modes of vibration that affect the overall seismic behaviour of the structures. This article presents an examination of the seismic response of G-CBRF structures, including the response of the roof and floor framing systems. Twenty-two buildings were designed for this study, with various combinations of building heights (2-, 4-, and 8-storeys), building locations (eastern and western Canada), site classes (soil C and E), and location of the braced frame within the building (interior or exterior column lines). For each design, two framing configurations were studied, with secondary beams parallel or perpendicular to the braced frames. Non-linear response history analyses were performed using representative ground motions selected and scaled according to the National Building Code of Canada requirements. Effects of the vertical component of the ground motions and energy dissipated through friction in beam-to-column connections were also of focus. Incremental dynamic analyses were performed to generate fragility curves for collapse due to overturning of the studied structures. The results show that peak drifts can be accurately predicted. Peak axial loads in frame members are increased due to the vertical inertia forces induced upon rocking. The fragility curves show that acceptable margins against collapse by overturning is achieved for G-CRBFs.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Anchorage Design Solution for Attaching an Approved Traffic Barrier to Multivoid Aluminum Bridge Decks.\n \n \n \n \n\n\n \n Annan, C.; Cormier, M.; and Fafard, M.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 147(7). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"AnchoragePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211910310110 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Anchorage Design Solution for Attaching an Approved Traffic Barrier to Multivoid Aluminum Bridge Decks},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Annan, Charles-Darwin and Cormier, Martin and Fafard, Mario},\nvolume = {147},\nnumber = {7},\nyear = {2021},\nissn = {07339445},\nabstract = {<div data-language="eng" data-ev-field="abstract">Bridge decks are the most stressed elements in a highway bridge due to direct loading from vehicular traffic and occasional overloading, combined with stresses induced by environmental effects and the use of deicing salts in cold wintery conditions. The use of structural aluminum alloys offers considerable promise for building modern bridges and for redecking aging and deficient bridges. Traffic barriers are mounted on bridge decks to provide a physical impassable limit to redirect errant vehicles safely onto the roadway. Current design standards require that the traffic barrier and anchorage system be physically tested under full-scale crash conditions to assure satisfactory interaction with impacting vehicles at the desired level of performance. Certain modifications to an already crash-tested and approved barrier may be permitted if it can be demonstrated by comprehensive analyses that they would not adversely affect the designed performance of the safety barrier. The present study seeks to develop and validate an anchorage design for attaching an already approved traffic barrier on bridge decks made from welded multivoid aluminum extrusions. The anchorage design facilitates installation and is able to absorb vehicular impact loads without compromising the structural integrity of the aluminum bridge deck. The study consists of two stages: (1) the capacity design and analysis of the attachment system based on equivalent static forces, and (2) a dynamic simulation of a full crash-test. This is followed by an approved procedure for verification and validation of the barrier-vehicle interaction, by comparing simulation results with observations from the original physical crash test.<br/></div> © 2021 American Society of Civil Engineers.},\nkey = {Aluminum bridges},\n%keywords = {Crashworthiness;Aluminum alloys;Accidents;Anchorages (foundations);Bridge decks;},\n%note = {Aluminum extrusion;Anchorage design;Anchorage systems;Comprehensive analysis;Deficient bridges;Vehicle interactions;Vehicular impacts;Verification-and-validation;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0003049},\n} \n\n\n
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Bridge decks are the most stressed elements in a highway bridge due to direct loading from vehicular traffic and occasional overloading, combined with stresses induced by environmental effects and the use of deicing salts in cold wintery conditions. The use of structural aluminum alloys offers considerable promise for building modern bridges and for redecking aging and deficient bridges. Traffic barriers are mounted on bridge decks to provide a physical impassable limit to redirect errant vehicles safely onto the roadway. Current design standards require that the traffic barrier and anchorage system be physically tested under full-scale crash conditions to assure satisfactory interaction with impacting vehicles at the desired level of performance. Certain modifications to an already crash-tested and approved barrier may be permitted if it can be demonstrated by comprehensive analyses that they would not adversely affect the designed performance of the safety barrier. The present study seeks to develop and validate an anchorage design for attaching an already approved traffic barrier on bridge decks made from welded multivoid aluminum extrusions. The anchorage design facilitates installation and is able to absorb vehicular impact loads without compromising the structural integrity of the aluminum bridge deck. The study consists of two stages: (1) the capacity design and analysis of the attachment system based on equivalent static forces, and (2) a dynamic simulation of a full crash-test. This is followed by an approved procedure for verification and validation of the barrier-vehicle interaction, by comparing simulation results with observations from the original physical crash test.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Defect detection in concrete plates with impulse-response test and statistical pattern recognition.\n \n \n \n \n\n\n \n Sajid, S.; Taras, A.; and Chouinard, L.\n\n\n \n\n\n\n Mechanical Systems and Signal Processing, 161. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"DefectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211810305990 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Defect detection in concrete plates with impulse-response test and statistical pattern recognition},\njournal = {Mechanical Systems and Signal Processing},\nauthor = {Sajid, Sikandar and Taras, Andre and Chouinard, Luc},\nvolume = {161},\nyear = {2021},\nissn = {08883270},\nabstract = {<div data-language="eng" data-ev-field="abstract">Statistical and machine learning analysis of structural health monitoring data is a popular approach for efficient structural level defect detection. However, the application of these techniques to stress-wave methods such as impact-echo and impulse-response data for local level detection has been limited. In this research, statistical pattern recognition in conjunction with the impulse-response test is shown to provide an efficient means for the detection of defects in concrete plates. For this purpose, the Frequency Response Function (FRF) derived from the impulse-response test following ASTM C1740 protocols at specific points on the test plate to define the feature space matrix. Analytical results demonstrate that the variability of the FRF increases in the presence of defects, which forms the physical basis for the proposed pattern recognition algorithm. First, Principal Component Analysis (PCA) is performed on the covariance of the feature space matrix to identify the dominant features of the FRFs and to determine the number of statistically significant factors or principal components. Factor scores are next used to identify locations on the plate that are associated most closely to each pattern. The generalized Extreme Value Studentized (ESD) test and box and whisker plots are applied to the factor score vector of all the test points to objectively identify test points with defects and rank these based on their severity. Two experimental specimens are used to demonstrate the applicability of the proposed detection algorithm. The first specimen, a partially reinforced clamped concrete plate, is used to demonstrate the relationship between the shapes and variability of the FRFs and the severity of defects (delaminations), the efficacy of the factor score as damage sensitive feature, and identification and the ranking of the severity of defects by using outlier statistical tests. The second specimen is used to demonstrate the efficiency of the procedure for detecting both void and honeycomb defects in a larger reinforced concrete plate on elastic supports. The proposed procedure is shown to provide similar levels of detectability as the highly refined yet time consuming ultrasonic shear-wave tomography test. While the impulse-response test has been in use for the condition assessment of concrete elements other than drilled shaft piles since 1980′s, defect detection has been based primarily on empirical observations and correlations with limited features of the frequency response function. The use of pattern recognition techniques to the full range of the frequency response function is proposed and shown to greatly improve the detection and characterization of defects.<br/></div> © 2021 Elsevier Ltd},\nkey = {Principal component analysis},\n%keywords = {Pattern recognition;Shear flow;Structural health monitoring;Anomaly detection;Damage detection;Shear waves;Defects;Surface waves;Honeycomb structures;Plates (structural components);Covariance matrix;Frequency response;Statistics;},\n%note = {Concrete plates;Defect detection;Factor scores;Feature space;Frequency response functions;Impulse-response test;Outlier Detection;Plates on elastic foundations;Principal-component analysis;Statistical pattern recognition;},\nURL = {http://dx.doi.org/10.1016/j.ymssp.2021.107948},\n} \n\n\n
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Statistical and machine learning analysis of structural health monitoring data is a popular approach for efficient structural level defect detection. However, the application of these techniques to stress-wave methods such as impact-echo and impulse-response data for local level detection has been limited. In this research, statistical pattern recognition in conjunction with the impulse-response test is shown to provide an efficient means for the detection of defects in concrete plates. For this purpose, the Frequency Response Function (FRF) derived from the impulse-response test following ASTM C1740 protocols at specific points on the test plate to define the feature space matrix. Analytical results demonstrate that the variability of the FRF increases in the presence of defects, which forms the physical basis for the proposed pattern recognition algorithm. First, Principal Component Analysis (PCA) is performed on the covariance of the feature space matrix to identify the dominant features of the FRFs and to determine the number of statistically significant factors or principal components. Factor scores are next used to identify locations on the plate that are associated most closely to each pattern. The generalized Extreme Value Studentized (ESD) test and box and whisker plots are applied to the factor score vector of all the test points to objectively identify test points with defects and rank these based on their severity. Two experimental specimens are used to demonstrate the applicability of the proposed detection algorithm. The first specimen, a partially reinforced clamped concrete plate, is used to demonstrate the relationship between the shapes and variability of the FRFs and the severity of defects (delaminations), the efficacy of the factor score as damage sensitive feature, and identification and the ranking of the severity of defects by using outlier statistical tests. The second specimen is used to demonstrate the efficiency of the procedure for detecting both void and honeycomb defects in a larger reinforced concrete plate on elastic supports. The proposed procedure is shown to provide similar levels of detectability as the highly refined yet time consuming ultrasonic shear-wave tomography test. While the impulse-response test has been in use for the condition assessment of concrete elements other than drilled shaft piles since 1980′s, defect detection has been based primarily on empirical observations and correlations with limited features of the frequency response function. The use of pattern recognition techniques to the full range of the frequency response function is proposed and shown to greatly improve the detection and characterization of defects.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n High-order finite element model of bridge rubber bearings for the prediction of buckling and shear failure.\n \n \n \n \n\n\n \n Saidou, A.; Gauron, O.; Busson, A.; and Paultre, P.\n\n\n \n\n\n\n Engineering Structures, 240. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"High-orderPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211710255194 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {High-order finite element model of bridge rubber bearings for the prediction of buckling and shear failure},\njournal = {Engineering Structures},\nauthor = {Saidou, Adamou and Gauron, Olivier and Busson, Arnaud and Paultre, Patrick},\nvolume = {240},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Performance-based design is becoming the main design method for highway bridge seismic design. This design method requires a good knowledge of the damage mechanisms of each component of the bridge. Rubber bearings and isolators represent a key component of the earthquake-resistance system of bridges that can experience large lateral displacements while supporting high axial loads. Rubber bearings and isolators can thus experience lateral instabilities under seismic loading, resulting in ultimate limit states by buckling or by shear failure depending on the geometry of the bearing. This paper investigates the development of a general numerical 3D finite element model for layered elastomeric bridge bearings and isolators that is able to accurately predict both limit states under shear-compression loadings at very large deformations. Such a model is aimed at subsequent utilization in large numerical and parametrical studies to develop practical and accurate design guidelines for the limit states of bridge rubber isolators. In this study, the accuracy of several rubber finite element formula tions has been studied, including the often used low-order and easy-to-calibrate Mooney-Rivlin and Neo-Hookean models and the two high-order Arruda-Boyce and 6-parameter Ogden models. For the latter model, a calibration procedure is proposed based on three simple standard characterization tests of the material that circumvents the much higher difficulty of calibration of the Ogden model compared to the others. The calibration results for the four considered models show that the 6-parameter Ogden model surpasses the ability of the three other models to accurately represent the material behavior in the different deformation modes experienced by rubber bearings under shear compression at large deformations. The four models are then compared for their ability to predict the force–displacement curves of some experimentally tested isolators. The Ogden model showed again higher accuracy compared to the other models that are mostly used in literature. The finite element model based on the Ogden formulation is finally completely validated by using extensive experimental results obtained from tests performed on real-scale rubber bearings and isolators of various shape factors and slenderness values. Finally, for nonslender bearings that experience shear failure at large deformation, a numerical material failure criterion is proposed and validated by comparing the critical displacement predictions of the model to the available experimental results.<br/></div> © 2021 Elsevier Ltd},\nkey = {Buckling},\n%keywords = {Highway bridges;Deformation;Finite element method;Forecasting;Rubber;Seismology;Nonmetallic bearings;Seismic design;Bearings (structural);},\n%note = {Bridge rubber bearing;Finite-element models;Limit state;Ogden formulation;Ogden model;Performance based design;Rubber bearing;Rubber isolators;Seismic isolation;Shear failure;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.112314},\n} \n\n\n
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Performance-based design is becoming the main design method for highway bridge seismic design. This design method requires a good knowledge of the damage mechanisms of each component of the bridge. Rubber bearings and isolators represent a key component of the earthquake-resistance system of bridges that can experience large lateral displacements while supporting high axial loads. Rubber bearings and isolators can thus experience lateral instabilities under seismic loading, resulting in ultimate limit states by buckling or by shear failure depending on the geometry of the bearing. This paper investigates the development of a general numerical 3D finite element model for layered elastomeric bridge bearings and isolators that is able to accurately predict both limit states under shear-compression loadings at very large deformations. Such a model is aimed at subsequent utilization in large numerical and parametrical studies to develop practical and accurate design guidelines for the limit states of bridge rubber isolators. In this study, the accuracy of several rubber finite element formula tions has been studied, including the often used low-order and easy-to-calibrate Mooney-Rivlin and Neo-Hookean models and the two high-order Arruda-Boyce and 6-parameter Ogden models. For the latter model, a calibration procedure is proposed based on three simple standard characterization tests of the material that circumvents the much higher difficulty of calibration of the Ogden model compared to the others. The calibration results for the four considered models show that the 6-parameter Ogden model surpasses the ability of the three other models to accurately represent the material behavior in the different deformation modes experienced by rubber bearings under shear compression at large deformations. The four models are then compared for their ability to predict the force–displacement curves of some experimentally tested isolators. The Ogden model showed again higher accuracy compared to the other models that are mostly used in literature. The finite element model based on the Ogden formulation is finally completely validated by using extensive experimental results obtained from tests performed on real-scale rubber bearings and isolators of various shape factors and slenderness values. Finally, for nonslender bearings that experience shear failure at large deformation, a numerical material failure criterion is proposed and validated by comparing the critical displacement predictions of the model to the available experimental results.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Reliability analysis of strength models for short-concrete columns under concentric loading with FRP rebars through Artificial Neural Network.\n \n \n \n \n\n\n \n Ahmad, A.; Elchalakani, M.; Elmesalami, N.; El Refai, A.; and Abed, F.\n\n\n \n\n\n\n Journal of Building Engineering, 42. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ReliabilityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211610224550 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Reliability analysis of strength models for short-concrete columns under concentric loading with FRP rebars through Artificial Neural Network},\njournal = {Journal of Building Engineering},\nauthor = {Ahmad, Afaq and Elchalakani, Mohamed and Elmesalami, Nouran and El Refai, Ahmed and Abed, Farid},\nvolume = {42},\nyear = {2021},\nissn = {23527102},\nabstract = {<div data-language="eng" data-ev-field="abstract">Over the last decade, the utilization of fiber-reinforced polymers (FRP) has been increased due to their versatile properties in concrete columns as a replacement of steel bars and their contribution to the axial load-carrying capacity of short concrete columns (SCC). Different researchers proposed equations to understand the load-carrying capacity of FRP rebars in SCC at the ultimate limit state (ULS). However, the current design practices have their reservation on the use (or taking the contribution) of FRP bars as the main vertical reinforcement in SCC. The present study aims to provide reliability analysis of all well-known physical models (for predicting the effect of FRP in SCC under concentric loading at ULS) through Artificial Neural Network (ANN) models (which do not base on mechanics) and new proposed equation (having a constant parameter to incorporate the lateral confinement effect). For this purpose, a database of 108 samples of SCC with FRP bars under concentric loading only, with detailed information (i.e., cross-section A<inf>g</inf>, length of column L, Elastic Modulus of FRP E<inf>f</inf>, compressive strength of concrete f<inf>c</inf> (MPa), longitudinal reinforcement ratio ρ<inf>l</inf> (%), transverse reinforcement ratio ρ<inf>t</inf> (%), and the ultimate axial load P<inf>exp</inf> (kN), is collected from previous studies. The predicted axial load values (P<inf>pred</inf>) from the ANN model (R = 0.94 and RMSE = 0.32) and proposed equation (R = 0.94 and RMSE = 0.32) exhibited closer results to the experimental values (P<inf>exp</inf>)as compared to counterpart physical models. Comparative studies of ratio P<inf>exp</inf>/P<inf>pred</inf> against the critical parameters exhibited better accuracy of the ANN model and proposed equation as compared to counterpart physical models.<br/></div> © 2021},\nkey = {Neural networks},\n%keywords = {Carbon fiber reinforced plastics;Compressive strength;Bars (metal);Concrete construction;Columns (structural);Axial loads;Load limits;Steel fibers;Fiber reinforced concrete;Reliability analysis;},\n%note = {Artificial neural network;Artificial neural network models;Concentric loading;Concentric loads;Concrete column;Fiber reinforced polymer bar;Fiber-reinforced polymers;Fibre reinforced polymers;Physical model;Short concrete column;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2021.102497},\n} \n\n\n
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Over the last decade, the utilization of fiber-reinforced polymers (FRP) has been increased due to their versatile properties in concrete columns as a replacement of steel bars and their contribution to the axial load-carrying capacity of short concrete columns (SCC). Different researchers proposed equations to understand the load-carrying capacity of FRP rebars in SCC at the ultimate limit state (ULS). However, the current design practices have their reservation on the use (or taking the contribution) of FRP bars as the main vertical reinforcement in SCC. The present study aims to provide reliability analysis of all well-known physical models (for predicting the effect of FRP in SCC under concentric loading at ULS) through Artificial Neural Network (ANN) models (which do not base on mechanics) and new proposed equation (having a constant parameter to incorporate the lateral confinement effect). For this purpose, a database of 108 samples of SCC with FRP bars under concentric loading only, with detailed information (i.e., cross-section Ag, length of column L, Elastic Modulus of FRP Ef, compressive strength of concrete fc (MPa), longitudinal reinforcement ratio ρl (%), transverse reinforcement ratio ρt (%), and the ultimate axial load Pexp (kN), is collected from previous studies. The predicted axial load values (Ppred) from the ANN model (R = 0.94 and RMSE = 0.32) and proposed equation (R = 0.94 and RMSE = 0.32) exhibited closer results to the experimental values (Pexp)as compared to counterpart physical models. Comparative studies of ratio Pexp/Ppred against the critical parameters exhibited better accuracy of the ANN model and proposed equation as compared to counterpart physical models.
© 2021\n
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\n \n\n \n \n \n \n \n \n Mechanical behavior of a full-scale RC wall-slab connection reinforced with frp under cyclic loading.\n \n \n \n \n\n\n \n Chalot, A.; Roy, N.; Michel, L.; and Ferrier, E.\n\n\n \n\n\n\n Engineering Structures, 239. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"MechanicalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211610235873 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Mechanical behavior of a full-scale RC wall-slab connection reinforced with frp under cyclic loading},\njournal = {Engineering Structures},\nauthor = {Chalot, A. and Roy, N. and Michel, L. and Ferrier, E.},\nvolume = {239},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents the results of two wall-slab connection tests to study the effect of composite reinforcement materials. The tests are carried out at Scale 1 on X-shaped connections with a wall and a continuous floor on either side of the node. The geometry and steel rebars of the tested specimens are chosen in accordance with European constructive practice [1]. The composite reinforcement is a combination of CFRP, GFRP, and carbon mesh. To study the mechanical behavior of the node, a combination of displacement transducers, load cells, strain gauges, and digital image correlation is used. From analysis of the results, we observe that the composite reinforcement increases the strength of the joint by 80%, and increases ductility by 33%. The reinforcement also changes the failure mode from a bending failure of the wall to a shear failure of the joint. By repositioning the failure zone, composite reinforcement also increases the energy dissipation of the joint by 385%. The proposed reinforcement solution is effective, and can be applied to existing structures that no longer meet seismic safety requirements.<br/></div> © 2021 Elsevier Ltd},\nkey = {Reinforcement},\n%keywords = {Transducers;Seismology;Energy dissipation;Image correlation;},\n%note = {CFRP anchors;Composite reinforcement;Experimental study;Full-scale RC structure;Mechanical behavior;Seismic application;Slab connections;Strengthening and reinforcement;Wall-slab;Wall-slab connection;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.112146},\n} \n\n\n
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This paper presents the results of two wall-slab connection tests to study the effect of composite reinforcement materials. The tests are carried out at Scale 1 on X-shaped connections with a wall and a continuous floor on either side of the node. The geometry and steel rebars of the tested specimens are chosen in accordance with European constructive practice [1]. The composite reinforcement is a combination of CFRP, GFRP, and carbon mesh. To study the mechanical behavior of the node, a combination of displacement transducers, load cells, strain gauges, and digital image correlation is used. From analysis of the results, we observe that the composite reinforcement increases the strength of the joint by 80%, and increases ductility by 33%. The reinforcement also changes the failure mode from a bending failure of the wall to a shear failure of the joint. By repositioning the failure zone, composite reinforcement also increases the energy dissipation of the joint by 385%. The proposed reinforcement solution is effective, and can be applied to existing structures that no longer meet seismic safety requirements.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Reliability-based assessment and calibration of standards for the lateral vibration of pedestrian bridges.\n \n \n \n \n\n\n \n Dey, P.; Narasimhan, S.; and Walbridge, S.\n\n\n \n\n\n\n Engineering Structures, 239. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"Reliability-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211510211777 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Reliability-based assessment and calibration of standards for the lateral vibration of pedestrian bridges},\njournal = {Engineering Structures},\nauthor = {Dey, Pampa and Narasimhan, Sriram and Walbridge, Scott},\nvolume = {239},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Ensuring vibrations remain tolerable to occupants is central to the serviceability limit state (SLS) design of lightweight pedestrian bridges. In general, pedestrians tend to be more sensitive to lateral bridge vibrations compared to vertical vibrations, which underscores the importance of serviceability limit state (SLS) design in the lateral direction. Significant uncertainties associated with the pedestrian loading and bridge behaviour motivate the need to treat serviceability design provisions from a reliability standpoint. This paper is a first attempt towards such an assessment and code calibration of SLS provisions applicable to the lateral direction in the existing major pedestrian bridge design guidelines (ISO 10137, Eurocode 5 and SÉTRA). For this purpose, this study adopts a reliability-based framework, which accounts for the uncertainties arising from the pedestrian loading, perceptions of vibration by pedestrians, and structural damping. Furthermore, SLS design generally considers commonly occurring design traffic densities only. However, several historical lateral vibration serviceability failures of pedestrian bridges have occurred under infrequent loading events. Hence, this paper also incorporates infrequent traffic event (load case) in the reliability assessment and calibration of the design guidelines. Results show that metal truss-type pedestrian bridges under design and infrequent traffic events need to be designed to a higher reliability level (through calibration) than currently achieved by these provisions under the design event. Adopting traffic density and frequency-dependent acceleration limits can mitigate overdesigns resulting from the calibration exercise. The desired reliability index required to achieve minimum acceptable performance of the designs under both the design and infrequent events is estimated iteratively in the proposed procedure, followed by the calculation of design calibration factors. This study shows that the calibration of some design provisions (e.g., SÉTRA) depends on amplitude-dependent damping values, while this is not the case with other provisions. This dependency can be attributed to differences in the form of the limit state function. Finally, it is shown that the proposed calibration process achieves sufficient and consistent reliability across all bridge classes under design and infrequent traffic events in the lateral direction, while ensuring economic designs using traffic density and frequency-based comfort limits.<br/></div> © 2021},\nkey = {Calibration},\n%keywords = {Design;Damping;Footbridges;Iterative methods;Reliability;},\n%note = {Lateral directions;Lateral vibrations;Limit state designs;Pedestrian loading;Reliability-based;Serviceability;Serviceability limit state;Traffic densities;Traffic event;Uncertainty;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.112271},\n} \n\n\n
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Ensuring vibrations remain tolerable to occupants is central to the serviceability limit state (SLS) design of lightweight pedestrian bridges. In general, pedestrians tend to be more sensitive to lateral bridge vibrations compared to vertical vibrations, which underscores the importance of serviceability limit state (SLS) design in the lateral direction. Significant uncertainties associated with the pedestrian loading and bridge behaviour motivate the need to treat serviceability design provisions from a reliability standpoint. This paper is a first attempt towards such an assessment and code calibration of SLS provisions applicable to the lateral direction in the existing major pedestrian bridge design guidelines (ISO 10137, Eurocode 5 and SÉTRA). For this purpose, this study adopts a reliability-based framework, which accounts for the uncertainties arising from the pedestrian loading, perceptions of vibration by pedestrians, and structural damping. Furthermore, SLS design generally considers commonly occurring design traffic densities only. However, several historical lateral vibration serviceability failures of pedestrian bridges have occurred under infrequent loading events. Hence, this paper also incorporates infrequent traffic event (load case) in the reliability assessment and calibration of the design guidelines. Results show that metal truss-type pedestrian bridges under design and infrequent traffic events need to be designed to a higher reliability level (through calibration) than currently achieved by these provisions under the design event. Adopting traffic density and frequency-dependent acceleration limits can mitigate overdesigns resulting from the calibration exercise. The desired reliability index required to achieve minimum acceptable performance of the designs under both the design and infrequent events is estimated iteratively in the proposed procedure, followed by the calculation of design calibration factors. This study shows that the calibration of some design provisions (e.g., SÉTRA) depends on amplitude-dependent damping values, while this is not the case with other provisions. This dependency can be attributed to differences in the form of the limit state function. Finally, it is shown that the proposed calibration process achieves sufficient and consistent reliability across all bridge classes under design and infrequent traffic events in the lateral direction, while ensuring economic designs using traffic density and frequency-based comfort limits.
© 2021\n
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\n \n\n \n \n \n \n \n \n Parametric study on the I-shape brace connection of conventional concentrically braced frames.\n \n \n \n \n\n\n \n Wang, C.; Tremblay, R.; and Rogers, C. A.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 182. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ParametricPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211410166956 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Parametric study on the I-shape brace connection of conventional concentrically braced frames},\njournal = {Journal of Constructional Steel Research},\nauthor = {Wang, Chen and Tremblay, Robert and Rogers, Colin A.},\nvolume = {182},\nyear = {2021},\nissn = {0143974X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Concentrically braced frames (CBFs), designed using the conventional linear elastic method without seismic proportioning and detailing requirements, are referred to as Conventional CBFs (CCBFs) in this study. They are widely used in moderate and low seismic areas in North America due to the ease of design and economy. Without a code specified dedicated fuse member to dissipate earthquake induced energy, or a prescribed yield/failure hierarchy, the brace connection of a CCBF is usually the weakest link in the lateral load-carrying path and prone to fracture. The brace connection is therefore determinant for the structural seismic performance. In this paper, a parametric study based on a validated numerical simulation procedure was carried out on a typical I-shape brace connection, i.e. the flange plate connection. Three key design parameters, namely, the gusset plate thickness, the flange lap plate thickness, and the web lap plate thickness, were varied to study their effects on both the compressive and tensile behaviour of the brace and connection assembly. Various possible failure modes were revealed both in compression and in tension. The results showed that the brace end restraint provided by flange plate connections in CCBFs was significant; the pinned-end assumption would lead to conservative estimation of the brace buckling resistance, which might trigger detrimental gusset plate buckling. The tensile overstrength of the flange lap plate, due to the presence of transverse tensile stress along the net section, was quantified using the von Mises criterion. Design recommendations are proposed with regards to attaining better deformation capacity.<br/></div> © 2021 Elsevier Ltd},\nkey = {Flanges},\n%keywords = {Plates (structural components);Structural frames;Seismology;Seismic design;},\n%note = {Concentrically braced frames;Conventional concentrically braced frame;Fe simulation;Flange plate connection;Flange plates;Gusset plates;I-shape brace;Parametric study;Plate connections;Plate thickness;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2021.106669},\n} \n\n\n
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Concentrically braced frames (CBFs), designed using the conventional linear elastic method without seismic proportioning and detailing requirements, are referred to as Conventional CBFs (CCBFs) in this study. They are widely used in moderate and low seismic areas in North America due to the ease of design and economy. Without a code specified dedicated fuse member to dissipate earthquake induced energy, or a prescribed yield/failure hierarchy, the brace connection of a CCBF is usually the weakest link in the lateral load-carrying path and prone to fracture. The brace connection is therefore determinant for the structural seismic performance. In this paper, a parametric study based on a validated numerical simulation procedure was carried out on a typical I-shape brace connection, i.e. the flange plate connection. Three key design parameters, namely, the gusset plate thickness, the flange lap plate thickness, and the web lap plate thickness, were varied to study their effects on both the compressive and tensile behaviour of the brace and connection assembly. Various possible failure modes were revealed both in compression and in tension. The results showed that the brace end restraint provided by flange plate connections in CCBFs was significant; the pinned-end assumption would lead to conservative estimation of the brace buckling resistance, which might trigger detrimental gusset plate buckling. The tensile overstrength of the flange lap plate, due to the presence of transverse tensile stress along the net section, was quantified using the von Mises criterion. Design recommendations are proposed with regards to attaining better deformation capacity.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Mapping terrestrial water storage changes in Canada using GRACE and GRACE-FO.\n \n \n \n \n\n\n \n Fatolazadeh, F.; and Goita, K.\n\n\n \n\n\n\n Science of the Total Environment, 779. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"MappingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211310142698 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Mapping terrestrial water storage changes in Canada using GRACE and GRACE-FO},\njournal = {Science of the Total Environment},\nauthor = {Fatolazadeh, Farzam and Goita, Kalifa},\nvolume = {779},\nyear = {2021},\nissn = {00489697},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study focused upon the estimation and analysis of terrestrial water storage (TWS changes) across the Canadian landscape. The estimation was performed using Gravity Recovery and Climate Experiment (GRACE) data from April 2002 to June 2017, and GRACE Follow-On (GRACE-FO) observations from June 2018 to December 2019. Removing the gravity effects of Glacial Isostatic Adjustment (GIA) signals and leakage is required to have realistic estimations of TWS changes in the Canadian landmass. In this study, GIA correction was based on a regional-scale modeling of uplift rate. To evaluate the performance compared to the latest GIA models, a comparison was made to uplift rate derived from 149 GPS stations over the study area. Refined TWS changes showed strong seasonal patterns (between −160 mm and 80 mm). The slope of the trend was positive (6.6 mm/year) for the period combining both GRACE and GRACE-FO. The trend increases to 45 mm/year over the 17-year period across central Canada, especially in regions surrounding Hudson Bay. For GRACE, maximum TWS variations occurred between February and April; for GRACE-FO, it occurred with a 2-month lag earlier during the short period being considered. Uncertainties in TWS variations that were derived by GRACE increased towards the end of the mission. Uncertainty for GRACE-FO is lower than that at the beginning of GRACE. The TWS changes extracted from the used approach were compared to Mascon solutions TWS changes products (GRCTellus JPL MSCNv02 and CSR MSCNv02), by using two steps: 1) the Water Global Assessment Prognosis hydrological model (WGHM), and 2) TWS changes derived from in-situ precipitation and potential evapotranspiration data. In all the cases our approach provided the best correlations and lower root mean square errors, compared to the Mascon products.<br/></div> © 2021 Elsevier B.V.},\nkey = {Digital storage},\n%keywords = {Mean square error;Glacial geology;Water supply;},\n%note = {Canada;Glacial Isostatic Adjustments;Gravity recovery and climate experiment datum;Gravity recovery and climate experiment-FO;Gravity recovery and climate experiments;Storage changes;Terrestrial water storage;Terrestrial water storage change;Uncertainty;Uplift rate;},\nURL = {http://dx.doi.org/10.1016/j.scitotenv.2021.146435},\n} \n\n\n\n
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This study focused upon the estimation and analysis of terrestrial water storage (TWS changes) across the Canadian landscape. The estimation was performed using Gravity Recovery and Climate Experiment (GRACE) data from April 2002 to June 2017, and GRACE Follow-On (GRACE-FO) observations from June 2018 to December 2019. Removing the gravity effects of Glacial Isostatic Adjustment (GIA) signals and leakage is required to have realistic estimations of TWS changes in the Canadian landmass. In this study, GIA correction was based on a regional-scale modeling of uplift rate. To evaluate the performance compared to the latest GIA models, a comparison was made to uplift rate derived from 149 GPS stations over the study area. Refined TWS changes showed strong seasonal patterns (between −160 mm and 80 mm). The slope of the trend was positive (6.6 mm/year) for the period combining both GRACE and GRACE-FO. The trend increases to 45 mm/year over the 17-year period across central Canada, especially in regions surrounding Hudson Bay. For GRACE, maximum TWS variations occurred between February and April; for GRACE-FO, it occurred with a 2-month lag earlier during the short period being considered. Uncertainties in TWS variations that were derived by GRACE increased towards the end of the mission. Uncertainty for GRACE-FO is lower than that at the beginning of GRACE. The TWS changes extracted from the used approach were compared to Mascon solutions TWS changes products (GRCTellus JPL MSCNv02 and CSR MSCNv02), by using two steps: 1) the Water Global Assessment Prognosis hydrological model (WGHM), and 2) TWS changes derived from in-situ precipitation and potential evapotranspiration data. In all the cases our approach provided the best correlations and lower root mean square errors, compared to the Mascon products.
© 2021 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n In Memoriam: Professor Giovanni Solari (1953–2020): former president, colleague, friend.\n \n \n \n \n\n\n \n Blocken, B.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 209. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"InPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20231213744071 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {In Memoriam: Professor Giovanni Solari (1953–2020): former president, colleague, friend},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Blocken, B. and Stathopoulos, T.},\nvolume = {209},\nyear = {2021},\nissn = {01676105},\nURL = {http://dx.doi.org/10.1016/j.jweia.2020.104498},\n} \n\n\n
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\n \n\n \n \n \n \n \n Unintended consequences of the global reduction in clinker-to-cement ratio.\n \n \n \n\n\n \n Lessard, J.; Habert, G.; Tagnit-Hamou, A.; and Amor, B.\n\n\n \n\n\n\n In volume SP-349, pages 394 - 407, Virtual, Online, 2021. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20224212967824 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Unintended consequences of the global reduction in clinker-to-cement ratio},\njournal = {American Concrete Institute, ACI Special Publication},\nauthor = {Lessard, Jean-Martin and Habert, Guillaume and Tagnit-Hamou, Arezki and Amor, Ben},\nvolume = {SP-349},\nyear = {2021},\npages = {394 - 407},\nissn = {01932527},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">To decarbonize the portland cement sector worldwide, the Cement Sustainability Initiative recommends systematically reducing the clinker-to-cement ratio down to 60% by 2050. However, the sources of usable clinker substitutes - the supplementary cementitious materials (SCMs) - are unevenly distributed geographically and will become increasingly scarce in the future. Through a time-series material-product chain analysis, this paper investigates the multi-regional and multi-sectorial (cement, coal-fired electricity, and steel sectors) interactions that occur when increasing demand for SCMs in eastern Canada and Northeastern U.S., up to 2050. It tracks the trade effects and how it affects region-specific domestic flows of raw and secondary materials, end-product products, and greenhouse gas emissions. Although the lever is favorable overall, the results show unintended economic and environmental consequences across regions, with winners and losers. At the material level, benefits are influenced by the local availability of SCMs, which disadvantages Canadian regions due to the increasing remoteness of supply to meet demand. At the product level, decoupling blended cement production capacity from clinker production capacity allows the U.S. regions to reduce their dependence on Canadian cement imports. These new perspectives provide key geopolitical, environmental, and economic insights for better decision-making when developing sustainable initiatives.<br/></div> © 2021 American Concrete Institute. All rights reserved.},\nkey = {Supply chains},\n%keywords = {Commerce;Decision making;Economic and social effects;Environmental impact;Gas emissions;Greenhouse gases;Portland cement;Sustainable development;Time series analysis;},\n%note = {% reductions;Cement sector;Economic optimization;Industrial symbiosis;Material Flow;Multiregional industrial symbiosis;Production capacity;Supplementary cementitious material;Trade effect;Unintended consequences;},\n} \n\n\n
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To decarbonize the portland cement sector worldwide, the Cement Sustainability Initiative recommends systematically reducing the clinker-to-cement ratio down to 60% by 2050. However, the sources of usable clinker substitutes - the supplementary cementitious materials (SCMs) - are unevenly distributed geographically and will become increasingly scarce in the future. Through a time-series material-product chain analysis, this paper investigates the multi-regional and multi-sectorial (cement, coal-fired electricity, and steel sectors) interactions that occur when increasing demand for SCMs in eastern Canada and Northeastern U.S., up to 2050. It tracks the trade effects and how it affects region-specific domestic flows of raw and secondary materials, end-product products, and greenhouse gas emissions. Although the lever is favorable overall, the results show unintended economic and environmental consequences across regions, with winners and losers. At the material level, benefits are influenced by the local availability of SCMs, which disadvantages Canadian regions due to the increasing remoteness of supply to meet demand. At the product level, decoupling blended cement production capacity from clinker production capacity allows the U.S. regions to reduce their dependence on Canadian cement imports. These new perspectives provide key geopolitical, environmental, and economic insights for better decision-making when developing sustainable initiatives.
© 2021 American Concrete Institute. All rights reserved.\n
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\n \n\n \n \n \n \n \n Investigation on Microstructure of Cement Pastes Made with a By-product from Primary Aluminum Production.\n \n \n \n\n\n \n Tran, H.; Brial, V.; Sanchez, T.; Sorelli, L.; Ouellet-Plamondon, C.; Conciatori, D.; Alamdari, H. D.; Fafard, M.; Birry, L.; and Beaulieu, M.\n\n\n \n\n\n\n In volume SP-349, pages 686 - 695, Virtual, Online, 2021. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20224212967845 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigation on Microstructure of Cement Pastes Made with a By-product from Primary Aluminum Production},\njournal = {American Concrete Institute, ACI Special Publication},\nauthor = {Tran, Hang and Brial, Victor and Sanchez, Thomas and Sorelli, Luca and Ouellet-Plamondon, Claudiane and Conciatori, David and Alamdari, Houshang D. and Fafard, Mario and Birry, Laurent and Beaulieu, Martin},\nvolume = {SP-349},\nyear = {2021},\npages = {686 - 695},\nissn = {01932527},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">Spent pot lining (SPL) is an industrial waste generated from aluminum electrolysis cells. LCLL-ash is the inert by-product coming from the treatment of the SPL refractory fraction at the SPL treatment plant (Jonquière, Canada). LCLL-ash has been ground to the fineness of the cement to substitute a part of cement in cement pastes. However, LCLL-ash contains higher contents of silica and alumina compared to Portland cement, which can affect the composition, the morphology and the mechanical properties of the binder hydrates (e.g. the Calcium-[Aluminum]Silicate Hydrates, C-[A]-S-H) with an important effect on the durability. This paper focuses on the investigation of the microstructure and the mechanical properties of LCLL blended cement pastes by applying multiple techniques including scanning electron microscopy, X-ray diffraction, and microindentation at the level of the cement paste. The water-to-binder ratio (w/b) is fixed at 0.35. The effect of the different proportions of LCLL-ash on the microstructural and mechanical properties of blended cement pastes is presented and discussed with relation to the normal Portland cement paste.<br/></div> © 2021 American Concrete Institute. All rights reserved.},\nkey = {Scanning electron microscopy},\n%keywords = {Alumina;Aluminum oxide;Durability;Electrolysis;Hydrates;Hydration;Microstructure;Morphology;Portland cement;Silica;X ray diffraction;},\n%note = {Aluminium electrolysis cells;Aluminum production;Blended cement pastes;Cement paste;High-content;Micro indentation;Primary aluminum;Spent pot linings;Treatment plants;XRD;},\n} \n\n\n
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Spent pot lining (SPL) is an industrial waste generated from aluminum electrolysis cells. LCLL-ash is the inert by-product coming from the treatment of the SPL refractory fraction at the SPL treatment plant (Jonquière, Canada). LCLL-ash has been ground to the fineness of the cement to substitute a part of cement in cement pastes. However, LCLL-ash contains higher contents of silica and alumina compared to Portland cement, which can affect the composition, the morphology and the mechanical properties of the binder hydrates (e.g. the Calcium-[Aluminum]Silicate Hydrates, C-[A]-S-H) with an important effect on the durability. This paper focuses on the investigation of the microstructure and the mechanical properties of LCLL blended cement pastes by applying multiple techniques including scanning electron microscopy, X-ray diffraction, and microindentation at the level of the cement paste. The water-to-binder ratio (w/b) is fixed at 0.35. The effect of the different proportions of LCLL-ash on the microstructural and mechanical properties of blended cement pastes is presented and discussed with relation to the normal Portland cement paste.
© 2021 American Concrete Institute. All rights reserved.\n
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\n \n\n \n \n \n \n \n Die Mühe, gut auszusehen.\n \n \n \n\n\n \n Leger, P.; Gong, A.; and Piwowar, A.\n\n\n \n\n\n\n Farbe und Lack, 127(3): 16 - 20. 2021.\n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20223112467349 ,\nlanguage = {German},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {The effort to look good},\ntitle = {Die Mühe, gut auszusehen},\njournal = {Farbe und Lack},\nauthor = {Leger, Pierre and Gong, Ashley and Piwowar, Alan},\nvolume = {127},\nnumber = {3},\nyear = {2021},\npages = {16 - 20},\nissn = {00147699},\nabstract = {<div data-language="ger" data-ev-field="abstract">SCHNECKENSPUREN // SCHNECKENSPUREN STELLEN HERSTELLER VON ARCHITEKTURFARBEN VOR GROSSE HERAUSFORDERUNGEN. DIESER ARTIKEL BELEUCHTET DIE DREI HAUPTURSACHEN FüR SCHNECKENSPUREN UND ZEIGT MöGLICHKEITEN ZUR OPTIMIERUNG VON LACKFORMULIE- RUNGEN UND ZUR VERBESSERUNG DER TROCKNUNGSGESCHWINDIGKEIT UND FILMBILDUNG AUF, UM DEM PROBLEM DER SCHNECKENSPUREN HERR ZU WERDEN.<br/></div>},\nkey = {Metals},\n} \n\n\n
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SCHNECKENSPUREN // SCHNECKENSPUREN STELLEN HERSTELLER VON ARCHITEKTURFARBEN VOR GROSSE HERAUSFORDERUNGEN. DIESER ARTIKEL BELEUCHTET DIE DREI HAUPTURSACHEN FüR SCHNECKENSPUREN UND ZEIGT MöGLICHKEITEN ZUR OPTIMIERUNG VON LACKFORMULIE- RUNGEN UND ZUR VERBESSERUNG DER TROCKNUNGSGESCHWINDIGKEIT UND FILMBILDUNG AUF, UM DEM PROBLEM DER SCHNECKENSPUREN HERR ZU WERDEN.
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\n \n\n \n \n \n \n \n Seismic loss analysis of buildings using sensor-based measurements.\n \n \n \n\n\n \n Bahmanoo, S.; Bagchi, S.; Sabamehr, A.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2021-June, pages 645 - 651, Porto, Portugal, 2021. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20222212166476 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic loss analysis of buildings using sensor-based measurements},\njournal = {International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII},\nauthor = {Bahmanoo, Sam and Bagchi, Saikat and Sabamehr, Ardalan and Bagchi, Ashutosh},\nvolume = {2021-June},\nyear = {2021},\npages = {645 - 651},\nissn = {25643738},\naddress = {Porto, Portugal},\nabstract = {<div data-language="eng" data-ev-field="abstract">A look at the worst earthquakes in recorded history, explains even though some buildings withstand catastrophic collapses, yet to be demolished due to not conforming to economic resilience demands. Thus, forecasting earthquake-induced loss of buildings is crucial for post-earthquake rehabilitation. Recent efforts by the Pacific Earthquake Engineering Research (PEER) Center have led to the development of the current generation of Performance-Based Earthquake Engineering (PBEE) approach. The PEER-PBEE is an appropriate basis to predict the seismic loss estimation of buildings in terms of repair cost, downtime and other decision variables. In this study, to improve the accuracy in seismic performance prediction of buildings, initially, the Operational Modal Analysis (OMA) is performed to extract the modal properties of a structure and then, the actual derived structural properties are reflected in a Finite Element (FE) model through FE model calibration. Next, the nonlinear time history analysis is performed to find the target structural responses in different ground motion records which are scaled for the Montreal area. Finally, the seismic resilience analysis based on PEER-PBEE is carried out to evaluate the seismic-induced repair cost and repair time. As a result, the calculated damage and loss consequence predictions would be sufficiently precise and accountable to be considered for post-earthquake rehabilitation. To investigate the rationality of the proposed methodology, the 16-storey Engineering and Visual arts (EV Building) complex of Concordia University is examined as a case study aided by the Structural Health Monitoring (SHM) system. Consequently, the result indicates the level of effect that the actual structural responses based on sensing measurements, can add to seismic vulnerability assessment of structural and non-structural elements, as well as better interpretation of loss consequence predictions and subsequent decision-making process.<br/></div> © 2021 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.},\nkey = {Structural health monitoring},\n%keywords = {Modal analysis;Behavioral research;Repair;Earthquakes;Buildings;Cost benefit analysis;Forecasting;Structural properties;Decision making;},\n%note = {FEMA P-58;Induced loss;Losses analysis;Model updating;Pacific earthquake engineering researches;Performance-based earthquake engineering;Repair costs;Research performance;Seismic loss;Structural response;},\n} \n\n\n
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A look at the worst earthquakes in recorded history, explains even though some buildings withstand catastrophic collapses, yet to be demolished due to not conforming to economic resilience demands. Thus, forecasting earthquake-induced loss of buildings is crucial for post-earthquake rehabilitation. Recent efforts by the Pacific Earthquake Engineering Research (PEER) Center have led to the development of the current generation of Performance-Based Earthquake Engineering (PBEE) approach. The PEER-PBEE is an appropriate basis to predict the seismic loss estimation of buildings in terms of repair cost, downtime and other decision variables. In this study, to improve the accuracy in seismic performance prediction of buildings, initially, the Operational Modal Analysis (OMA) is performed to extract the modal properties of a structure and then, the actual derived structural properties are reflected in a Finite Element (FE) model through FE model calibration. Next, the nonlinear time history analysis is performed to find the target structural responses in different ground motion records which are scaled for the Montreal area. Finally, the seismic resilience analysis based on PEER-PBEE is carried out to evaluate the seismic-induced repair cost and repair time. As a result, the calculated damage and loss consequence predictions would be sufficiently precise and accountable to be considered for post-earthquake rehabilitation. To investigate the rationality of the proposed methodology, the 16-storey Engineering and Visual arts (EV Building) complex of Concordia University is examined as a case study aided by the Structural Health Monitoring (SHM) system. Consequently, the result indicates the level of effect that the actual structural responses based on sensing measurements, can add to seismic vulnerability assessment of structural and non-structural elements, as well as better interpretation of loss consequence predictions and subsequent decision-making process.
© 2021 International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Simulation of wave propagation in biomimetic porous scaffold using artificial neural network.\n \n \n \n \n\n\n \n Hodaei, M.; and Maghoul, P.\n\n\n \n\n\n\n In volume 1, pages American Society of Mechanical Engineers (ASME) - , Virtual, Online, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"SimulationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20220711639294 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Simulation of wave propagation in biomimetic porous scaffold using artificial neural network},\njournal = {ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)},\nauthor = {Hodaei, Mohammad and Maghoul, Pooneh},\nvolume = {1},\nyear = {2021},\npages = {American Society of Mechanical Engineers (ASME) - },\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">The study of wave propagation in biomimetic porous scaffold requires the inclusion of some complex physics such as the interaction of the ultrasonic wave with pore fluid, solid phase, and porous material. Also, due to viscous interactions between the pore fluid and skeletal frame, the dynamic tortuosity as a fractional function of frequency in the clinically relevant ultrasound frequency range is considered. The bone scaffold here is simulated using a porous slab whose two dimensions are infinite. The Biot-JKD theory used for wave propagation in porous media is conditioned with many physical parameters. Solving such governing equations for complex multi-physics problems is computationally expensive. Therefore, developing efficient tools and numerical methods to address multi-physics problems is appealing. Artificial Neural Network (ANN) can efficiently solve convoluted-parametric problems. The purpose of this research is to propose a physics-aware ANN to simulate wave propagation in bone scaffold filled with a viscous fluid. A set of data including porosity, viscosity, tortuosity, viscous characteristics length, Poisson’s ratio, and elastic modulus which are sensitive to the transmission and reflection signals are applied to the ANN as inputs and the reflection and transmission signals are obtained as outputs. The reflected and transmitted waves for different porosities are considered and the results show an excellent agreement with the proposed analytical theory and experimental data found in the literature.<br/></div> Copyright © 2021 by ASME},\nkey = {Porous materials},\n%keywords = {Neural networks;Viscosity;Biomimetics;Acoustic wave propagation;Scaffolds;Viscous flow;Complex networks;Porosity;Acoustics;Numerical methods;},\n%note = {Acoustics waves;Biomimetic bone scaffold;Bone scaffolds;Fluid solids;Multiphysics problems;Pore fluids;Porous medium;Porous scaffold;Solid phasis;Viscous fluids;},\nURL = {http://dx.doi.org/10.1115/IMECE2021-74492},\n} \n\n\n
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The study of wave propagation in biomimetic porous scaffold requires the inclusion of some complex physics such as the interaction of the ultrasonic wave with pore fluid, solid phase, and porous material. Also, due to viscous interactions between the pore fluid and skeletal frame, the dynamic tortuosity as a fractional function of frequency in the clinically relevant ultrasound frequency range is considered. The bone scaffold here is simulated using a porous slab whose two dimensions are infinite. The Biot-JKD theory used for wave propagation in porous media is conditioned with many physical parameters. Solving such governing equations for complex multi-physics problems is computationally expensive. Therefore, developing efficient tools and numerical methods to address multi-physics problems is appealing. Artificial Neural Network (ANN) can efficiently solve convoluted-parametric problems. The purpose of this research is to propose a physics-aware ANN to simulate wave propagation in bone scaffold filled with a viscous fluid. A set of data including porosity, viscosity, tortuosity, viscous characteristics length, Poisson’s ratio, and elastic modulus which are sensitive to the transmission and reflection signals are applied to the ANN as inputs and the reflection and transmission signals are obtained as outputs. The reflected and transmitted waves for different porosities are considered and the results show an excellent agreement with the proposed analytical theory and experimental data found in the literature.
Copyright © 2021 by ASME\n
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\n \n\n \n \n \n \n \n \n Ultrasonic characterization of biomimetic porous scaffold using machine learning: Application of biot’s theory.\n \n \n \n \n\n\n \n Hodaei, M.; and Maghoul, P.\n\n\n \n\n\n\n In volume 1, pages American Society of Mechanical Engineers (ASME) - , Virtual, Online, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"UltrasonicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20220711639300 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Ultrasonic characterization of biomimetic porous scaffold using machine learning: Application of biot’s theory},\njournal = {ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)},\nauthor = {Hodaei, Mohammad and Maghoul, Pooneh},\nvolume = {1},\nyear = {2021},\npages = {American Society of Mechanical Engineers (ASME) - },\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">A two-dimensional infinite length porous slab is employed to simulate biomimetic porous scaffold. The pores of slab are saturated with a relatively low and high viscous fluids such as air and bone marrow. Ultrasonic waves based on the Biot-JKD formulation travel through the porous slab and create viscous exchanges between the skeletal frame and the fluid. The Biot-JKD formulation focuses on the parameters, biomarkers of the biomimetic porous scaffold, which are sensitive to the transmission and reflection signals. These parameters include porosity, tortuosity, viscous characteristic length, Young’s modulus, and Poisson’s ratio. An artificial neural network (ANN) based on a set of the biomarkers is rendered to model the transmitted and reflected waves from the porous slab. The validation of the proposed analytical approach and released artificial neural network is evaluated by the pertinent literature. The output of the artificial neural network, the transmitted-reflected waves, is inversely applied to the analytical expression to estimate the biomarkers associated with bone regeneration. The results show that for a medium filled with a relatively high viscous fluid the longitudinal waves are more prone to estimate mechanical properties of the medium such as Young’s modulus and Poisson’s ratio while the transverse waves, in addition to longitudinal waves, are essential to estimate the physical properties of the medium including porosity, tortuosity, and viscous characteristic length. Furthermore, it is also concluded that for the medium filled with a relatively low viscous fluid such as air the longitudinal waves alone is able to estimate the biomarkers, which reduce significantly the computational efforts.<br/></div> Copyright © 2021 by ASME},\nkey = {Porous materials},\n%keywords = {Viscosity;Neural networks;Viscous flow;Biomimetics;Bone;Scaffolds;Computation theory;Porosity;Inverse problems;Air;Machine learning;},\n%note = {Acoustics waves;Biomimetic porous scaffold;High viscous fluids;Inverse problem;Longitudinal waves;Machine-learning;Porous medium;Porous scaffold;Porous slab;Viscous fluids;},\nURL = {http://dx.doi.org/10.1115/IMECE2021-72746},\n} \n\n\n
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A two-dimensional infinite length porous slab is employed to simulate biomimetic porous scaffold. The pores of slab are saturated with a relatively low and high viscous fluids such as air and bone marrow. Ultrasonic waves based on the Biot-JKD formulation travel through the porous slab and create viscous exchanges between the skeletal frame and the fluid. The Biot-JKD formulation focuses on the parameters, biomarkers of the biomimetic porous scaffold, which are sensitive to the transmission and reflection signals. These parameters include porosity, tortuosity, viscous characteristic length, Young’s modulus, and Poisson’s ratio. An artificial neural network (ANN) based on a set of the biomarkers is rendered to model the transmitted and reflected waves from the porous slab. The validation of the proposed analytical approach and released artificial neural network is evaluated by the pertinent literature. The output of the artificial neural network, the transmitted-reflected waves, is inversely applied to the analytical expression to estimate the biomarkers associated with bone regeneration. The results show that for a medium filled with a relatively high viscous fluid the longitudinal waves are more prone to estimate mechanical properties of the medium such as Young’s modulus and Poisson’s ratio while the transverse waves, in addition to longitudinal waves, are essential to estimate the physical properties of the medium including porosity, tortuosity, and viscous characteristic length. Furthermore, it is also concluded that for the medium filled with a relatively low viscous fluid such as air the longitudinal waves alone is able to estimate the biomarkers, which reduce significantly the computational efforts.
Copyright © 2021 by ASME\n
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\n \n\n \n \n \n \n \n \n Effects of Aquatic and Emergent Riparian Vegetation on SWOT Mission Capability in Detecting Surface Water Extent.\n \n \n \n \n\n\n \n Desrochers, N.; Trudel, M.; Biancamaria, S.; Siles, G.; Desroches, D.; Carbonne, D.; and Leconte, R.\n\n\n \n\n\n\n IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 14: 12467 - 12478. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EffectsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20215211402650 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effects of Aquatic and Emergent Riparian Vegetation on SWOT Mission Capability in Detecting Surface Water Extent},\njournal = {IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing},\nauthor = {Desrochers, Nicolas and Trudel, Melanie and Biancamaria, Sylvain and Siles, Gabriela and Desroches, Damien and Carbonne, Denis and Leconte, Robert},\nvolume = {14},\nyear = {2021},\npages = {12467 - 12478},\nissn = {19391404},\nabstract = {<div data-language="eng" data-ev-field="abstract">The future surface water and ocean topography (SWOT) satellite mission will provide images of surface water topography for inland water bodies and oceans. Over land, water surface elevation (WSE) will be retrieved at 10 cm accuracy for water bodies with areas > 250 m × 250 m and rivers with widths > 100 m, when averaging over 1 km2. Studies have shown that the Ka-band used by SWOT's main payload can be affected by aquatic and emergent riparian vegetation, which in turn could influence SWOT capacity to correctly observe water extent. The current study investigates effects of aquatic and emergent riparian vegetation on SWOT water extent and WSE detection capabilities through the use of NASA/JPL's SWOT simulator (HR). Data from the AirSWOT airborne campaign over Mamawi Lake (163 km2) in the Peace-Athabasca Delta (PAD, Alberta, Canada), are used to establish a land cover classification and backscattering values for simulation inputs. Simulation results have shown that aquatic vegetation has a negligible effect on the SWOT signal. Yet, simulations showed that water extent misclassification can occur for water with emergent riparian vegetation in the specific case of wetlands surrounding lakes (i.e., small differences in backscattering values between surrounding land and water with emergent riparian vegetation). Simulations featuring the smallest difference between emergent riparian vegetation and land (1.3 dB) showed a 32-35% lake extent reduction from true extent. As expected, this study reveals that estimating water extent from SWOT in very wet environments with emergent vegetation can be challenging.<br/></div> © 2008-2012 IEEE.},\nkey = {Lakes},\n%keywords = {Topography;NASA;Vegetation;Backscattering;},\n%note = {AirSWOT;Aquatic vegetation;Emergent vegetation;Mission capability;Ocean topography;Riparian vegetation;Satellite mission;Surface water ocean topography;Water surface elevations;Waterbodies;},\nURL = {http://dx.doi.org/10.1109/JSTARS.2021.3128133},\n} \n\n\n
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The future surface water and ocean topography (SWOT) satellite mission will provide images of surface water topography for inland water bodies and oceans. Over land, water surface elevation (WSE) will be retrieved at 10 cm accuracy for water bodies with areas > 250 m × 250 m and rivers with widths > 100 m, when averaging over 1 km2. Studies have shown that the Ka-band used by SWOT's main payload can be affected by aquatic and emergent riparian vegetation, which in turn could influence SWOT capacity to correctly observe water extent. The current study investigates effects of aquatic and emergent riparian vegetation on SWOT water extent and WSE detection capabilities through the use of NASA/JPL's SWOT simulator (HR). Data from the AirSWOT airborne campaign over Mamawi Lake (163 km2) in the Peace-Athabasca Delta (PAD, Alberta, Canada), are used to establish a land cover classification and backscattering values for simulation inputs. Simulation results have shown that aquatic vegetation has a negligible effect on the SWOT signal. Yet, simulations showed that water extent misclassification can occur for water with emergent riparian vegetation in the specific case of wetlands surrounding lakes (i.e., small differences in backscattering values between surrounding land and water with emergent riparian vegetation). Simulations featuring the smallest difference between emergent riparian vegetation and land (1.3 dB) showed a 32-35% lake extent reduction from true extent. As expected, this study reveals that estimating water extent from SWOT in very wet environments with emergent vegetation can be challenging.
© 2008-2012 IEEE.\n
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\n \n\n \n \n \n \n \n Local scale damping model for reinforced concrete elements.\n \n \n \n\n\n \n Chambreuil, C.; Giry, C.; Ragueneau, F.; and Leger, P.\n\n\n \n\n\n\n In volume 2021-June, Athens, Greece, 2021. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20215011313997 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Local scale damping model for reinforced concrete elements},\njournal = {COMPDYN Proceedings},\nauthor = {Chambreuil, Clotilde and Giry, Cedric and Ragueneau, Frederic and Leger, Pierre},\nvolume = {2021-June},\nyear = {2021},\nissn = {26233347},\naddress = {Athens, Greece},\nabstract = {<div data-language="eng" data-ev-field="abstract">Reinforced concrete (RC) structures dissipate energy when subjected to seismic excitations. Modeling seismic energy dissipations on a rational basis still represents challenging issues. At local scale, dissipative constitutive RC models are developed to take into consideration different phenomena, such as cracks opening, friction, plasticity, and their couplings or rebar bond slip. Practically some of those dissipative mechanisms are modeled by equivalent Rayleigh viscous damping at the global structural level. However, Rayleigh damping lacks a physical basis leading sometimes to an uncontrolled evolution of energy dissipation when non linearities occur [1]. This paper provides the basis of an updated local damping model based on parameters modeling concrete dissipative phenomenon, to reduce the need for arbitrary equivalent viscous damping as much as possible and thus better model energy dissipations on a rational physical basis. Using shake table experimental results on prismatic RC beams [2], a numerical study is presented to assess the performance of sixteen different global damping formulations to represent physical energy dissipation mechanisms. Energy balance analyses are used to evaluate dissipative phenomena at the local concrete level and to demonstrate that friction is the most significant local dissipative phenomenon. In addition, an equivalent viscous damping identification method is developed to determine transient damping ratio evolution during dynamic computations as a function of damage parameters, like stiffness degradation. An exponential function is found suitable to take into consideration global viscous damping adjustment as a function of local damage occurring during dynamic nonlinear analyses.<br/></div> © 2021 COMPDYN Proceedings.},\nkey = {Damping},\n%keywords = {Computational methods;Damage detection;Earthquake engineering;Energy balance;Energy dissipation;Engineering geology;Exponential functions;Friction;Reinforced concrete;Seismology;},\n%note = {Damping modelings;Dissipative phenomenon;Energy;Equivalent viscous damping;Local scale;Non-linear modelling;Reinforced concrete elements;Reinforced concrete structures;Seismic excitations;Viscous damping;},\n} \n\n\n
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Reinforced concrete (RC) structures dissipate energy when subjected to seismic excitations. Modeling seismic energy dissipations on a rational basis still represents challenging issues. At local scale, dissipative constitutive RC models are developed to take into consideration different phenomena, such as cracks opening, friction, plasticity, and their couplings or rebar bond slip. Practically some of those dissipative mechanisms are modeled by equivalent Rayleigh viscous damping at the global structural level. However, Rayleigh damping lacks a physical basis leading sometimes to an uncontrolled evolution of energy dissipation when non linearities occur [1]. This paper provides the basis of an updated local damping model based on parameters modeling concrete dissipative phenomenon, to reduce the need for arbitrary equivalent viscous damping as much as possible and thus better model energy dissipations on a rational physical basis. Using shake table experimental results on prismatic RC beams [2], a numerical study is presented to assess the performance of sixteen different global damping formulations to represent physical energy dissipation mechanisms. Energy balance analyses are used to evaluate dissipative phenomena at the local concrete level and to demonstrate that friction is the most significant local dissipative phenomenon. In addition, an equivalent viscous damping identification method is developed to determine transient damping ratio evolution during dynamic computations as a function of damage parameters, like stiffness degradation. An exponential function is found suitable to take into consideration global viscous damping adjustment as a function of local damage occurring during dynamic nonlinear analyses.
© 2021 COMPDYN Proceedings.\n
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\n \n\n \n \n \n \n \n Design and life cycle assessment of an innovative hybrid bridge made of aluminium deck and glulam timber beams.\n \n \n \n\n\n \n Beudon, C.; Oudjene, M.; Djedid, A.; Annan, C.; and Fafard, M.\n\n\n \n\n\n\n In pages ARAUCO; CMPC; et al.; Etex; LP Building Products; Simpson Strong-Tie - , Santiago, Chile, 2021. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20215011310390 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design and life cycle assessment of an innovative hybrid bridge made of aluminium deck and glulam timber beams},\njournal = {World Conference on Timber Engineering 2021, WCTE 2021},\nauthor = {Beudon, Camille and Oudjene, Marc and Djedid, Amar and Annan, Charles-Darwin and Fafard, Mario},\nyear = {2021},\npages = {ARAUCO; CMPC; et al.; Etex; LP Building Products; Simpson Strong-Tie - },\naddress = {Santiago, Chile},\nabstract = {<div data-language="eng" data-ev-field="abstract">Reinforced concrete and steel are the most commonly used materials in bridge construction in Quebec, Canada. The production of these materials has a significant environmental impact and contributes to the scarcity of nonrenewable resources due to the numerous maintenance requirements during the life of the structure. Consequently, the Quebec government is seeking to promote the use of aluminium and engineered wood in the construction and rehabilitation of road bridges. These two materials are not widely used, largely due to the short-term vision of political decision-makers and insufficient knowledge and experience. However, they are competitive materials due to their local production, durability and recyclability. The life cycle assessment method allows an analysis of the use of different materials, considering all the stages of the life cycle of a structure. The comparison of a roadway bridge made of aluminium deck on glulam timber beams to a bridge made of aluminium deck on steel beams shows that due to its local production and the use of materials with a low environmental impact (glulam timber), the aluminium/wood bridge is economically and environmentally more advantageous than the aluminium/steel bridge. Similarly, a comparison of this alternative aluminium/wood solution to the conventional concrete slab-on-steel bridge solution shows a decrease in overall cost by 86% and a decrease in environmental impacts by 88% due to its possible prefabrication and the relatively low number of interventions over its lifetime.<br/></div> © WCTE 2021. All rights reserved.},\nkey = {Life cycle},\n%keywords = {Bridge decks;Timber;Environmental impact;Decision making;Reinforced concrete;Concrete slabs;},\n%note = {Aluminum deck;Bridge constructions;Canada;Glulam timber beams;Government IS;Hybrid bridge;Local production;Maintenance requirement;Nonrenewable resource;Quebec;},\n} \n\n\n
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Reinforced concrete and steel are the most commonly used materials in bridge construction in Quebec, Canada. The production of these materials has a significant environmental impact and contributes to the scarcity of nonrenewable resources due to the numerous maintenance requirements during the life of the structure. Consequently, the Quebec government is seeking to promote the use of aluminium and engineered wood in the construction and rehabilitation of road bridges. These two materials are not widely used, largely due to the short-term vision of political decision-makers and insufficient knowledge and experience. However, they are competitive materials due to their local production, durability and recyclability. The life cycle assessment method allows an analysis of the use of different materials, considering all the stages of the life cycle of a structure. The comparison of a roadway bridge made of aluminium deck on glulam timber beams to a bridge made of aluminium deck on steel beams shows that due to its local production and the use of materials with a low environmental impact (glulam timber), the aluminium/wood bridge is economically and environmentally more advantageous than the aluminium/steel bridge. Similarly, a comparison of this alternative aluminium/wood solution to the conventional concrete slab-on-steel bridge solution shows a decrease in overall cost by 86% and a decrease in environmental impacts by 88% due to its possible prefabrication and the relatively low number of interventions over its lifetime.
© WCTE 2021. All rights reserved.\n
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\n \n\n \n \n \n \n \n Dynamic behavior of aluminum deck-on-steel girder bridges under vehicular traffic loads considering the effect of road roughness.\n \n \n \n\n\n \n Afia, A. B.; Annan, C.; and Dey, P.\n\n\n \n\n\n\n In pages 1623 - 1632, Ghent, Virtual, Belgium, 2021. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20214611181332 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Dynamic behavior of aluminum deck-on-steel girder bridges under vehicular traffic loads considering the effect of road roughness},\njournal = {IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs},\nauthor = {Afia, Achraf Ben and Annan, Charles-Darwin and Dey, Pampa},\nyear = {2021},\npages = {1623 - 1632},\naddress = {Ghent, Virtual, Belgium},\nabstract = {<div data-language="eng" data-ev-field="abstract">Aluminium as a structural material is known for its lightweight, which facilitates easy transportation and installation, and reduces foundation requirements. However, this lightweight characteristic makes it sensitive to excitations from vehicular traffic leading to dominating dynamic design over the static one. The dynamic design of highway bridges by the Canadian Highway Bridge Design Code (CSA S6-19) is based on the concept of equivalent dynamic amplification factors (DAF), which were derived largely based on the observations from bridges constructed with traditional materials such as concrete, wood and steel. It is prudent to evaluate whether these factors are applicable to lightweight bridges made with extruded aluminium decks. In addition, since road roughness plays an important role in the dynamic behaviour of a bridge, it is important to consider the influence of roughness on the bridge vibration response. The objective of this research is to investigate the dynamic behaviour of aluminium deck-on-steel girder bridges under vehicular loads considering the effect of road roughness, and consequently evaluate the applicability of the current design DAFs for such structures. For this purpose, numerical models have been developed in Abaqus for a range of selected bridge configurations and loading parameters and subsequently the key observations and conclusions from the numerical analysis have been presented in this paper.<br/></div> © 2021 IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. All rights reserved.},\nkey = {Highway bridges},\n%keywords = {Materials handling;Aluminum;Steel beams and girders;Dynamic response;Highway planning;Roads and streets;},\n%note = {Bridge dynamic response;Bridge dynamics;Dynamic behaviors;Dynamic design;Extruded aluminum;Extruded aluminum deck;Road roughness;Steel girder bridge;Traffic loads;Vehicular excitation;},\n} \n\n\n
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Aluminium as a structural material is known for its lightweight, which facilitates easy transportation and installation, and reduces foundation requirements. However, this lightweight characteristic makes it sensitive to excitations from vehicular traffic leading to dominating dynamic design over the static one. The dynamic design of highway bridges by the Canadian Highway Bridge Design Code (CSA S6-19) is based on the concept of equivalent dynamic amplification factors (DAF), which were derived largely based on the observations from bridges constructed with traditional materials such as concrete, wood and steel. It is prudent to evaluate whether these factors are applicable to lightweight bridges made with extruded aluminium decks. In addition, since road roughness plays an important role in the dynamic behaviour of a bridge, it is important to consider the influence of roughness on the bridge vibration response. The objective of this research is to investigate the dynamic behaviour of aluminium deck-on-steel girder bridges under vehicular loads considering the effect of road roughness, and consequently evaluate the applicability of the current design DAFs for such structures. For this purpose, numerical models have been developed in Abaqus for a range of selected bridge configurations and loading parameters and subsequently the key observations and conclusions from the numerical analysis have been presented in this paper.
© 2021 IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Numerical study of a blind bolted connection between an aluminum bridge deck and steel girders.\n \n \n \n \n\n\n \n El Ogri, S.; Annan, C.; and Dey, P.\n\n\n \n\n\n\n In pages 2044 - 2052, Ghent, Virtual, Belgium, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20214611181231 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical study of a blind bolted connection between an aluminum bridge deck and steel girders},\njournal = {IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs},\nauthor = {El Ogri, Soufiane and Annan, Charles-Darwin and Dey, Pampa},\nyear = {2021},\npages = {2044 - 2052},\naddress = {Ghent, Virtual, Belgium},\nabstract = {<div data-language="eng" data-ev-field="abstract">This article concerns the behaviour of two blind bolt types, Ajax One side and Blind Oversize Mechanically (BOM), used to connect a multi-void aluminum bridge deck on its supporting steel girders. An extensive numerical simulation by FEM was performed to evaluate the connection behaviour against the Canadian Highway Bridge Design standard CSA S6-19. The main objective was to examine the assembly against fretting and quantify its impact at the contact zone over several load cycles. A special numerical model was developed for the prediction of fretting, and validated with analytical results and other observations reported in the literature. The model was used to analyze the fretting for each bolt at the surface of contact between the bolt head and the aluminum plate. Results of the study revealed that the blind bolts will lead to a few micrometers of wear, while for the standard bolt, a probable crack developments associated with minor wear may occur at the contact area.<br/></div> © 2021 IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. All rights reserved.},\nkey = {Highway bridges},\n%keywords = {Aluminum bridges;Bolts;Bridge decks;Highway planning;Numerical models;Steel beams and girders;Structural design;Wear of materials;},\n%note = {Ajax oneside bolt;Blind bolt;Blind bolted connections;Blind oversize mechanically bolt;Blinded bolt;Deck girders;Extruded aluminum;Extruded aluminum deck;Fretting;Steel girder;},\nURL = {http://dx.doi.org/10.2749/ghent.2021.2044},\n} \n\n\n
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This article concerns the behaviour of two blind bolt types, Ajax One side and Blind Oversize Mechanically (BOM), used to connect a multi-void aluminum bridge deck on its supporting steel girders. An extensive numerical simulation by FEM was performed to evaluate the connection behaviour against the Canadian Highway Bridge Design standard CSA S6-19. The main objective was to examine the assembly against fretting and quantify its impact at the contact zone over several load cycles. A special numerical model was developed for the prediction of fretting, and validated with analytical results and other observations reported in the literature. The model was used to analyze the fretting for each bolt at the surface of contact between the bolt head and the aluminum plate. Results of the study revealed that the blind bolts will lead to a few micrometers of wear, while for the standard bolt, a probable crack developments associated with minor wear may occur at the contact area.
© 2021 IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Hurricane risk assessment of offshore wind turbines under changing climate.\n \n \n \n \n\n\n \n Snaiki, R.; and Wu, T.\n\n\n \n\n\n\n In pages 241 - 248, Ghent, Virtual, Belgium, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"HurricanePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20214611181165 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Hurricane risk assessment of offshore wind turbines under changing climate},\njournal = {IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs},\nauthor = {Snaiki, Reda and Wu, Teng},\nyear = {2021},\npages = {241 - 248},\naddress = {Ghent, Virtual, Belgium},\nabstract = {<div data-language="eng" data-ev-field="abstract">Offshore wind energy is attracting increasing attention across the North America. However, the offshore wind turbines along the East Coast are extremely vulnerable to hurricane-induced hazards. The vulnerability to hurricanes is expected to change due to global warming's effects. This study quantifies the risk of floating wind turbines (FWTs) subjected to hurricane hazards under current and future climate scenarios. The hurricane hazard estimation is achieved using a hurricane track model which generates a large synthetic database of hurricanes allowing for accurate risk estimation. The structural response of the FWTs during each hurricane event is obtained using an efficient physics-based 3-D model. The case study results involving a parked FWT indicate that the change in hurricane-induced risk, evaluated in terms of the magnification factor, to the FWTs would significantly increase with the intensity measure.<br/></div> © 2021 IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. All rights reserved.},\nkey = {Risk perception},\n%keywords = {Global warming;Hazards;Hurricanes;Offshore oil well production;Offshore wind turbines;Risk assessment;Structural design;Wind power;},\n%note = {'current;Changing climate;East coast;Floating wind turbines;Fragility curves;Future climate scenarios;Hurricane risk;Off-shore wind energy;Risks assessments;Synthetic track;},\nURL = {http://dx.doi.org/10.2749/ghent.2021.0241},\n} \n\n\n
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Offshore wind energy is attracting increasing attention across the North America. However, the offshore wind turbines along the East Coast are extremely vulnerable to hurricane-induced hazards. The vulnerability to hurricanes is expected to change due to global warming's effects. This study quantifies the risk of floating wind turbines (FWTs) subjected to hurricane hazards under current and future climate scenarios. The hurricane hazard estimation is achieved using a hurricane track model which generates a large synthetic database of hurricanes allowing for accurate risk estimation. The structural response of the FWTs during each hurricane event is obtained using an efficient physics-based 3-D model. The case study results involving a parked FWT indicate that the change in hurricane-induced risk, evaluated in terms of the magnification factor, to the FWTs would significantly increase with the intensity measure.
© 2021 IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Investigation of hybrid multi-core buckling-restrained brace components.\n \n \n \n \n\n\n \n Thibault, P.; Annan, C.; and Dey, P.\n\n\n \n\n\n\n In pages 1415 - 1421, Ghent, Virtual, Belgium, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"InvestigationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20214611181307 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigation of hybrid multi-core buckling-restrained brace components},\njournal = {IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs},\nauthor = {Thibault, Pierre and Annan, Charles-Darwin and Dey, Pampa},\nyear = {2021},\npages = {1415 - 1421},\naddress = {Ghent, Virtual, Belgium},\nabstract = {<div data-language="eng" data-ev-field="abstract">Contemporary seismic-resistant design of steel braced frames is based on dissipating seismic energy through significant inelastic axial deformation in brace components. Buckling-restrained braced (BRB) frames are a type of concentrically braced frame (CBF) characterised by braces that yield both in tension and in compression. These braces therefore exhibit superior cyclic performance compared with traditional CBFs. However, buckling-restrained braces commonly display a low post-yield stiffness, causing substantial interstory drifts and large residual drifts after seismic events. Moreover, yielding of the core is often only tied to a single performance objective, thus making its performance at other levels of seismicity largely unknown. One promising solution is the use of a hybrid BRB, where multiple cores made from different metals are connected in parallel to work together and complement each other. This research is geared towards first evaluating the potential of different combinations of core materials, followed by the design of a hybrid BRB system that can accommodate multiple core plates. Results show that the post-yield behaviour of hybrid BRBs is improved by employing a combination of 350WT carbon steel and another metal with low-yield and high strain-hardening behaviour, such as stainless steels, aluminium alloys, or other grades of carbon steels. Finally, a detailed overview of one hybrid BRB solution is proposed.<br/></div> © 2021 IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. All rights reserved.},\nkey = {Seismic design},\n%keywords = {Buckling;Coremaking;Energy dissipation;Hybrid materials;Seismology;Strain hardening;Structural frames;},\n%note = {Axial deformations;Buckling restrained braces;Buckling-restrained;Concentrically braced frames;Cyclic response;Hybrid;Multi-cores;Seismic energy;Seismic resistant design;Steel braced frames;},\nURL = {http://dx.doi.org/10.2749/ghent.2021.1415},\n} \n\n\n
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Contemporary seismic-resistant design of steel braced frames is based on dissipating seismic energy through significant inelastic axial deformation in brace components. Buckling-restrained braced (BRB) frames are a type of concentrically braced frame (CBF) characterised by braces that yield both in tension and in compression. These braces therefore exhibit superior cyclic performance compared with traditional CBFs. However, buckling-restrained braces commonly display a low post-yield stiffness, causing substantial interstory drifts and large residual drifts after seismic events. Moreover, yielding of the core is often only tied to a single performance objective, thus making its performance at other levels of seismicity largely unknown. One promising solution is the use of a hybrid BRB, where multiple cores made from different metals are connected in parallel to work together and complement each other. This research is geared towards first evaluating the potential of different combinations of core materials, followed by the design of a hybrid BRB system that can accommodate multiple core plates. Results show that the post-yield behaviour of hybrid BRBs is improved by employing a combination of 350WT carbon steel and another metal with low-yield and high strain-hardening behaviour, such as stainless steels, aluminium alloys, or other grades of carbon steels. Finally, a detailed overview of one hybrid BRB solution is proposed.
© 2021 IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Numerical analysis of the fatigue behaviour of friction stir welded joints in aluminum bridge decks.\n \n \n \n \n\n\n \n Trimech, M.; Annan, C.; Walbridge, S.; and Amira, S.\n\n\n \n\n\n\n In pages 1528 - 1536, Ghent, Virtual, Belgium, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20214611181321 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical analysis of the fatigue behaviour of friction stir welded joints in aluminum bridge decks},\njournal = {IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs},\nauthor = {Trimech, Mahmoud and Annan, Charles-Darwin and Walbridge, Scott and Amira, Sofiene},\nyear = {2021},\npages = {1528 - 1536},\naddress = {Ghent, Virtual, Belgium},\nabstract = {<div data-language="eng" data-ev-field="abstract">Friction stir welding (FSW), a relatively new welding technique, has been widely used in the aerospace and manufacturing industries, showing superior mechanical and durability properties. However, its application in civil engineering is very limited due to the absence of appropriate standards and quality control guidelines. FSW appears to be a promising welding solution for the fabrication of vehicular bridge decks made from aluminum extrusions, with a potential to reduce distortions and improve fatigue properties. The fatigue behaviour of common FSW joint types such as the butt FSW has extensively been investigated and documented in literature. However, certain practical configurations such as the butt-lap joint used in the fabrication of extruded aluminum bridge decks have rarely been studied, especially in the area of fatigue performance. In this context, the present research provides first an overview on the welding process of typical aluminum friction stir welded bridge deck extrusions presenting the butt-lap configuration. Then, the fatigue behaviour of butt-lap FSW joints is assessed using the effective notch stress (ENS) approach. The effect of geometrical features on the fatigue behaviour of butt-lap FSW joints is numerically investigated also by the ENS approach.<br/></div> © 2021 IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. All rights reserved.},\nkey = {Friction stir welding},\n%keywords = {Aluminum;Aluminum bridges;Bridge decks;Extrusion;Fatigue of materials;Friction;Quality control;Research laboratories;Structural design;Welds;},\n%note = {Aluminum bridge deck;Butt-lap joint;Effective notch stress;Fatigue behaviour;Friction stir welded joints;Friction stir welding joints;Friction-stir-welding;Lap joint;Manufacturing industries;Mechanical and durability properties;},\nURL = {http://dx.doi.org/10.2749/ghent.2021.1528},\n} \n\n\n
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Friction stir welding (FSW), a relatively new welding technique, has been widely used in the aerospace and manufacturing industries, showing superior mechanical and durability properties. However, its application in civil engineering is very limited due to the absence of appropriate standards and quality control guidelines. FSW appears to be a promising welding solution for the fabrication of vehicular bridge decks made from aluminum extrusions, with a potential to reduce distortions and improve fatigue properties. The fatigue behaviour of common FSW joint types such as the butt FSW has extensively been investigated and documented in literature. However, certain practical configurations such as the butt-lap joint used in the fabrication of extruded aluminum bridge decks have rarely been studied, especially in the area of fatigue performance. In this context, the present research provides first an overview on the welding process of typical aluminum friction stir welded bridge deck extrusions presenting the butt-lap configuration. Then, the fatigue behaviour of butt-lap FSW joints is assessed using the effective notch stress (ENS) approach. The effect of geometrical features on the fatigue behaviour of butt-lap FSW joints is numerically investigated also by the ENS approach.
© 2021 IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Enhanced façade design: A data-driven approach for decision analysis based on past experiences.\n \n \n \n \n\n\n \n Moghtadernejad, S.; Chouinard, L. E.; and Mirza, M. S.\n\n\n \n\n\n\n Developments in the Built Environment, 5. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EnhancedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214411091609 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Enhanced façade design: A data-driven approach for decision analysis based on past experiences},\njournal = {Developments in the Built Environment},\nauthor = {Moghtadernejad, Saviz and Chouinard, Luc E. and Mirza, M. Saeed},\nvolume = {5},\nyear = {2021},\nissn = {26661659},\nabstract = {<div data-language="eng" data-ev-field="abstract">The selection of an optimal building façade system is a challenging process that can be facilitated by using decision-analysis methods. However, current commonly-used decision-analysis tools in civil engineering cannot deal with the interactions among multiple design criteria. The Choquet integral is the only well-known method capable of accounting for such interactions. However, the process of assigning the fuzzy measures (importance weights) for this method is complex, particularly when there is a large number of criteria be considered. This paper proposes two supervised methods to estimate these fuzzy measures. The first method estimates the relative importance weights by using a statistical approach based on Principal Component Analysis, while the second method is elicited from a machine learning algorithm using Neural Networks. These two methods are used in an illustrative example to find the fuzzy measures related to façade design with respect to four criteria; and their merits and limitations are discussed.<br/></div> © 2020 The Authors},\nkey = {Principal component analysis},\n%keywords = {Learning algorithms;Integral equations;Decision making;Neural networks;Machine learning;Fuzzy systems;},\n%note = {Choquet integral;Data-driven approach;Decision analysis tool;Design criteria;Fuzzy measures;Importance weights;Statistical approach;Supervised methods;},\nURL = {http://dx.doi.org/10.1016/j.dibe.2020.100038},\n} \n\n\n
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The selection of an optimal building façade system is a challenging process that can be facilitated by using decision-analysis methods. However, current commonly-used decision-analysis tools in civil engineering cannot deal with the interactions among multiple design criteria. The Choquet integral is the only well-known method capable of accounting for such interactions. However, the process of assigning the fuzzy measures (importance weights) for this method is complex, particularly when there is a large number of criteria be considered. This paper proposes two supervised methods to estimate these fuzzy measures. The first method estimates the relative importance weights by using a statistical approach based on Principal Component Analysis, while the second method is elicited from a machine learning algorithm using Neural Networks. These two methods are used in an illustrative example to find the fuzzy measures related to façade design with respect to four criteria; and their merits and limitations are discussed.
© 2020 The Authors\n
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\n \n\n \n \n \n \n \n \n Social Network Search for Solving Engineering Optimization Problems.\n \n \n \n \n\n\n \n Bayzidi, H.; Talatahari, S.; Saraee, M.; and Lamarche, C.\n\n\n \n\n\n\n Computational Intelligence and Neuroscience, 2021. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"SocialPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214311044219 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Social Network Search for Solving Engineering Optimization Problems},\njournal = {Computational Intelligence and Neuroscience},\nauthor = {Bayzidi, Hadi and Talatahari, Siamak and Saraee, Meysam and Lamarche, Charles-Philippe},\nvolume = {2021},\nyear = {2021},\nissn = {16875265},\nabstract = {<div data-language="eng" data-ev-field="abstract">In this paper, a new metaheuristic optimization algorithm, called social network search (SNS), is employed for solving mixed continuous/discrete engineering optimization problems. The SNS algorithm mimics the social network user's efforts to gain more popularity by modeling the decision moods in expressing their opinions. Four decision moods, including imitation, conversation, disputation, and innovation, are real-world behaviors of users in social networks. These moods are used as optimization operators that model how users are affected and motivated to share their new views. The SNS algorithm was verified with 14 benchmark engineering optimization problems and one real application in the field of remote sensing. The performance of the proposed method is compared with various algorithms to show its effectiveness over other well-known optimizers in terms of computational cost and accuracy. In most cases, the optimal solutions achieved by the SNS are better than the best solution obtained by the existing methods.<br/></div> © 2021 Hadi Bayzidi et al.},\nkey = {Remote sensing},\n%keywords = {Benchmarking;User profile;Optimization;},\n%note = {Continuous-discrete;Engineering optimization problems;Metaheuristic optimization;Network users;Optimization algorithms;Optimization operators;Real applications;Real-world;Search Algorithms;Social network searches;},\nURL = {http://dx.doi.org/10.1155/2021/8548639},\n} \n\n\n
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In this paper, a new metaheuristic optimization algorithm, called social network search (SNS), is employed for solving mixed continuous/discrete engineering optimization problems. The SNS algorithm mimics the social network user's efforts to gain more popularity by modeling the decision moods in expressing their opinions. Four decision moods, including imitation, conversation, disputation, and innovation, are real-world behaviors of users in social networks. These moods are used as optimization operators that model how users are affected and motivated to share their new views. The SNS algorithm was verified with 14 benchmark engineering optimization problems and one real application in the field of remote sensing. The performance of the proposed method is compared with various algorithms to show its effectiveness over other well-known optimizers in terms of computational cost and accuracy. In most cases, the optimal solutions achieved by the SNS are better than the best solution obtained by the existing methods.
© 2021 Hadi Bayzidi et al.\n
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\n \n\n \n \n \n \n \n \n Spatial Gap-Filling of SMAP Soil Moisture Pixels over Tibetan Plateau via Machine Learning Versus Geostatistics.\n \n \n \n \n\n\n \n Tong, C.; Wang, H.; Magagi, R.; Goita, K.; and Wang, K.\n\n\n \n\n\n\n IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 14: 9899 - 9912. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"SpatialPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213810924805 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Spatial Gap-Filling of SMAP Soil Moisture Pixels over Tibetan Plateau via Machine Learning Versus Geostatistics},\njournal = {IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing},\nauthor = {Tong, Cheng and Wang, Hongquan and Magagi, Ramata and Goita, Kalifa and Wang, Ke},\nvolume = {14},\nyear = {2021},\npages = {9899 - 9912},\nissn = {19391404},\nabstract = {<div data-language="eng" data-ev-field="abstract">Soil moisture (SM) is a key variable in ecology, environment, agriculture, and hydrology. The Soil Moisture Active Passive (SMAP) satellite provides global SM products with reliable accuracy since 2015. However, significant gaps of SMAP SM appeared over Tibetan Plateau. Considering the important role of the Tibetan Plateau in global climate and environment, it is essential to develop methods to infill the gaps to generate seamless SMAP SM data. To address this issue, we proposed two methods, machine learning and geostatistics technique. For the machine learning technique, we train a Random Forest algorithm which aims to match the output of available SMAP L3 SM using a series of input variables such as SMAP brightness temperature (TBH and TBV) in ascending orbits (6:00 PM local time), surface temperature, MODIS NDVI, land cover, DEM, and other auxiliary data. Then, the established RF estimators were applied to the SMAP brightness temperature from descending orbits (6:00 AM local time) to reconstruct complete SM data over the Tibetan Plateau. For the geostatistics technique, the Ordinary kriging was applied to the available SMAP L3 SM pixels to interpolate complete SM data. To cross-validate the performances of the algorithms, we assume certain areas with available SMAP SM values as missing, and then compared the gap-filling results with the actual ones. The cross-validations show that the gap-filling results from two algorithms were highly correlated to the official SMAP SM products with high coefficients of determination (R2RF = 0.97 and R2OK = 0.85) and low RMSE (RMSERF = 0.015 cm3/cm3 and RMSEOK = 0.036 cm3/cm3). Furthermore, the gap-filling SM data present a better correlation with the Soil Moisture and Ocean Salinity SM data (R = 0.55-0.7) than the Global Land Data Assimilation System simulations (R = 0.18-0.62). The reconstructed SM from RF (R = 0.71) and OK (R = 0.55) algorithms are well related to the Maqu network measurements. Thus, the machine learning and geostatistics algorithms have the potential to reproduce the missing SMAP SM products over the Tibetan Plateau.<br/></div> © 2008-2012 IEEE.},\nkey = {Soil moisture},\n%keywords = {Interpolation;Orbits;Pixels;Temperature;Learning algorithms;Radiometers;Filling;Luminance;Machine learning;Decision trees;Soil surveys;},\n%note = {Brightness temperatures;Cross validation;Highly-correlated;Machine learning techniques;Ordinary kriging;Random forest algorithm;Soil moisture active passive (SMAP);Surface temperatures;},\nURL = {http://dx.doi.org/10.1109/JSTARS.2021.3112623},\n} \n\n\n
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Soil moisture (SM) is a key variable in ecology, environment, agriculture, and hydrology. The Soil Moisture Active Passive (SMAP) satellite provides global SM products with reliable accuracy since 2015. However, significant gaps of SMAP SM appeared over Tibetan Plateau. Considering the important role of the Tibetan Plateau in global climate and environment, it is essential to develop methods to infill the gaps to generate seamless SMAP SM data. To address this issue, we proposed two methods, machine learning and geostatistics technique. For the machine learning technique, we train a Random Forest algorithm which aims to match the output of available SMAP L3 SM using a series of input variables such as SMAP brightness temperature (TBH and TBV) in ascending orbits (6:00 PM local time), surface temperature, MODIS NDVI, land cover, DEM, and other auxiliary data. Then, the established RF estimators were applied to the SMAP brightness temperature from descending orbits (6:00 AM local time) to reconstruct complete SM data over the Tibetan Plateau. For the geostatistics technique, the Ordinary kriging was applied to the available SMAP L3 SM pixels to interpolate complete SM data. To cross-validate the performances of the algorithms, we assume certain areas with available SMAP SM values as missing, and then compared the gap-filling results with the actual ones. The cross-validations show that the gap-filling results from two algorithms were highly correlated to the official SMAP SM products with high coefficients of determination (R2RF = 0.97 and R2OK = 0.85) and low RMSE (RMSERF = 0.015 cm3/cm3 and RMSEOK = 0.036 cm3/cm3). Furthermore, the gap-filling SM data present a better correlation with the Soil Moisture and Ocean Salinity SM data (R = 0.55-0.7) than the Global Land Data Assimilation System simulations (R = 0.18-0.62). The reconstructed SM from RF (R = 0.71) and OK (R = 0.55) algorithms are well related to the Maqu network measurements. Thus, the machine learning and geostatistics algorithms have the potential to reproduce the missing SMAP SM products over the Tibetan Plateau.
© 2008-2012 IEEE.\n
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\n \n\n \n \n \n \n \n \n Shear modulus and hysteretic damping of sensitive eastern canada clays.\n \n \n \n \n\n\n \n Abdellaziz, M.; Karray, M.; Chekired, M.; Delisle, M.; Locat, P.; Ledoux, C.; and Mompin, R.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 58(8): 1118 - 1134. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ShearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213310764465 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shear modulus and hysteretic damping of sensitive eastern canada clays},\njournal = {Canadian Geotechnical Journal},\nauthor = {Abdellaziz, Mustapha and Karray, Mourad and Chekired, Mohamed and Delisle, Marie-Christine and Locat, Pascal and Ledoux, Catherine and Mompin, Remi},\nvolume = {58},\nnumber = {8},\nyear = {2021},\npages = {1118 - 1134},\nissn = {00083674},\nabstract = {<div data-language="eng" data-ev-field="abstract">The shear modulus and hysteretic damping of three sensitive clays from the sediments of Champlain Sea were investigated using a combined triaxial simple shear apparatus. The tests were conducted on undisturbed samples and were carried out on a wide range of shear strains from about 0.001% to 1%. The values of the small-strain shear modulus of the tested clays were further confirmed through a series of piezoelectric ring actuator tests. Although the shear modulus and damping ratio of the sensitive eastern Canadian clays follow some classic literature models, the results show that the examined clays exhibited more linear behaviour. Such behaviour may be attributed to their highly structured nature compared to other clays. The compilation of available data on the shear modulus and damping ratio of several sensitive eastern Canadian clays confirmed this trend and showed that some literature models might not be representative.<br/></div> © 2021 The Author(s).},\nkey = {Elastic moduli},\n%keywords = {Damping;Hysteresis;Shear strain;Piezoelectric actuators;},\n%note = {Champlain seas;Eastern Canada;Hysteretic damping;Literature models;Piezoelectric rings;Sensitive clays;Small-strain shear modulus;Undisturbed sample;},\nURL = {http://dx.doi.org/10.1139/cgj-2020-0254},\n} \n\n\n
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The shear modulus and hysteretic damping of three sensitive clays from the sediments of Champlain Sea were investigated using a combined triaxial simple shear apparatus. The tests were conducted on undisturbed samples and were carried out on a wide range of shear strains from about 0.001% to 1%. The values of the small-strain shear modulus of the tested clays were further confirmed through a series of piezoelectric ring actuator tests. Although the shear modulus and damping ratio of the sensitive eastern Canadian clays follow some classic literature models, the results show that the examined clays exhibited more linear behaviour. Such behaviour may be attributed to their highly structured nature compared to other clays. The compilation of available data on the shear modulus and damping ratio of several sensitive eastern Canadian clays confirmed this trend and showed that some literature models might not be representative.
© 2021 The Author(s).\n
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\n \n\n \n \n \n \n \n \n A Holistic methodology for lifecycle energy consumption of heritage buildings.\n \n \n \n \n\n\n \n Al-Sakkaf, A.; Abdelkader, E.; El-Zahab, S.; Bagchi, A.; and Zayed, T.\n\n\n \n\n\n\n In volume 1900, Virtual, Online, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20212710584857 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Holistic methodology for lifecycle energy consumption of heritage buildings},\njournal = {Journal of Physics: Conference Series},\nauthor = {Al-Sakkaf, A. and Abdelkader, E.M. and El-Zahab, S. and Bagchi, A. and Zayed, T.},\nvolume = {1900},\nnumber = {1},\nyear = {2021},\nissn = {17426588},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">Heritage buildings are historically exceptional in their landscape and specific attention must be paid to their architectural element and components. Recently, the techniques that are utilized for the study and protection of cultural heritage have been on the rise in the research field. Studies have shown that project life cycle phases can be implemented to determine the performance of a given building in general. However, heritage buildings and their need were not considered. The project life cycle phases include: 1) planning, 2) manufacturing, 3) transportation, 4) construction, 5) operation and 6) maintenance phases. In addition, there is a need for an encompassing rating system that is capable of determining the most optimal pathway for rehabilitating heritage buildings. Hence, this article aims to present a comprehensive life cycle energy analysis model that optimizes expenditure over all building components by optimizing the budget. Furthermore, as a proof of concept, two case studies are applied in this research-GN in Canada and MP in the KSA.<br/></div> © Published under licence by IOP Publishing Ltd.},\nkey = {Energy utilization},\n%keywords = {Budget control;Buildings;Life cycle;},\n%note = {Architectural element;Cultural heritages;Heritage buildings;Life cycle energy analysis;Project life cycle;Proof of concept;Rating system;Research fields;},\nURL = {http://dx.doi.org/10.1088/1742-6596/1900/1/012014},\n} \n\n\n
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Heritage buildings are historically exceptional in their landscape and specific attention must be paid to their architectural element and components. Recently, the techniques that are utilized for the study and protection of cultural heritage have been on the rise in the research field. Studies have shown that project life cycle phases can be implemented to determine the performance of a given building in general. However, heritage buildings and their need were not considered. The project life cycle phases include: 1) planning, 2) manufacturing, 3) transportation, 4) construction, 5) operation and 6) maintenance phases. In addition, there is a need for an encompassing rating system that is capable of determining the most optimal pathway for rehabilitating heritage buildings. Hence, this article aims to present a comprehensive life cycle energy analysis model that optimizes expenditure over all building components by optimizing the budget. Furthermore, as a proof of concept, two case studies are applied in this research-GN in Canada and MP in the KSA.
© Published under licence by IOP Publishing Ltd.\n
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\n \n\n \n \n \n \n \n \n Detection of subsurface defects in concrete slabs using ground penetrating radar.\n \n \n \n \n\n\n \n Donda, D.; Latosh, F.; Rahman, M. A.; and Bagchi, A.\n\n\n \n\n\n\n In volume 11592, pages The Society of Photo-Optical Instrumentation Engineers (SPIE) - , Virtual, Online, United states, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"DetectionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20212610569711 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Detection of subsurface defects in concrete slabs using ground penetrating radar},\njournal = {Proceedings of SPIE - The International Society for Optical Engineering},\nauthor = {Donda, Dipesh and Latosh, Fawzi and Rahman, Mohammed Abdul and Bagchi, Ashutosh},\nvolume = {11592},\nyear = {2021},\npages = {The Society of Photo-Optical Instrumentation Engineers (SPIE) - },\nissn = {0277786X},\naddress = {Virtual, Online, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">The use of Ground Penetrating Radar (GPR) in the Non-Destructive Evaluation (NDE) of structures has significantly increased in the past decades. Several attempts have been made by the researchers to detect the surface and subsurface deterioration of the concrete using GPR. This study aims to analyze the attenuation of the signal in concrete due to various subsurface defect and rebars, simulated in a controlled laboratory environment. Three small plain concrete slabs of surface dimensions of 25 x 50 cm and varying depths of 5 cm, 10 cm, and 20 cm were utilized in this study. The slabs were scanned using a GPR by stacking the slabs one above another to simulate different depths for the detection of the gap between the concrete slabs. Materials such as paper sheets, cardboard sheets, foam sheets, reinforcement bars, and an FRP (Fiber Reinforced Polymer) bar were placed between the concrete slab, and the reflections amplitudes were investigated at the interface medium. An air gap and water gap are introduced between the slabs to simulate defects between slabs which is typically the case for horizontal cracks and delamination. The results obtained are promising as they show a variation in the measured reflected amplitudes for different materials across all depths. This research will be helpful to detect subsurface cracks on the actual structures such as concrete bridge deck and its standardized quantification could be useful to the decision-makers for the monitoring as well as planning the repair and retrofitting of the structures.<br/></div> © 2021 SPIE.},\nkey = {Geological surveys},\n%keywords = {Bridge decks;Fiber reinforced plastics;Reinforced concrete;Geophysical prospecting;Deterioration;Crack detection;Ground penetrating radar systems;Tracking radar;Decision making;Nondestructive examination;Concrete slabs;},\n%note = {Controlled laboratories;Fiber reinforced polymers;Ground Penetrating Radar;Ground penetrating radar (GPR);Horizontal cracks;Non destructive evaluation;Reinforcement bar;Subsurface cracks;},\nURL = {http://dx.doi.org/10.1117/12.2582807},\n} \n\n\n
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The use of Ground Penetrating Radar (GPR) in the Non-Destructive Evaluation (NDE) of structures has significantly increased in the past decades. Several attempts have been made by the researchers to detect the surface and subsurface deterioration of the concrete using GPR. This study aims to analyze the attenuation of the signal in concrete due to various subsurface defect and rebars, simulated in a controlled laboratory environment. Three small plain concrete slabs of surface dimensions of 25 x 50 cm and varying depths of 5 cm, 10 cm, and 20 cm were utilized in this study. The slabs were scanned using a GPR by stacking the slabs one above another to simulate different depths for the detection of the gap between the concrete slabs. Materials such as paper sheets, cardboard sheets, foam sheets, reinforcement bars, and an FRP (Fiber Reinforced Polymer) bar were placed between the concrete slab, and the reflections amplitudes were investigated at the interface medium. An air gap and water gap are introduced between the slabs to simulate defects between slabs which is typically the case for horizontal cracks and delamination. The results obtained are promising as they show a variation in the measured reflected amplitudes for different materials across all depths. This research will be helpful to detect subsurface cracks on the actual structures such as concrete bridge deck and its standardized quantification could be useful to the decision-makers for the monitoring as well as planning the repair and retrofitting of the structures.
© 2021 SPIE.\n
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\n \n\n \n \n \n \n \n \n EXPECTED SEISMIC PERFORMANCE of GRAVITY DAMS USING MACHINE LEARNING TECHNIQUES.\n \n \n \n \n\n\n \n Segura, R. L.; Padgett, J. E.; and Paultre, P.\n\n\n \n\n\n\n Bulletin of the New Zealand Society for Earthquake Engineering, 54(2): 58 - 68. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EXPECTEDPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212410503738 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {EXPECTED SEISMIC PERFORMANCE of GRAVITY DAMS USING MACHINE LEARNING TECHNIQUES},\njournal = {Bulletin of the New Zealand Society for Earthquake Engineering},\nauthor = {Segura, Rocio L. and Padgett, Jamie E. and Paultre, Patrick},\nvolume = {54},\nnumber = {2},\nyear = {2021},\npages = {58 - 68},\nissn = {11749857},\nabstract = {<div data-language="eng" data-ev-field="abstract">Methods for the seismic analysis of dams have improved extensively in the last several decades. Advanced numerical models have become more feasible and constitute the basis of improved procedures for design and assessment. A probabilistic framework is required to manage the various sources of uncertainty that may impact system performance and fragility analysis is a promising approach for depicting conditional probabilities of limit state exceedance under such uncertainties. However, the effect of model parameter variation on the seismic fragility analysis of structures with complex numerical models, such as dams, is frequently overlooked due to the costly and time-consuming revaluation of the numerical model. To improve the seismic assessment of such structures by jointly reducing the computational burden, this study proposes the implementation of a polynomial response surface metamodel to emulate the response of the system. The latter will be computationally and visually validated and used to predict the continuous relative maximum base sliding of the dam in order to build fragility functions and show the effect of modelling parameter variation. The resulting fragility functions are used to assess the seismic performance of the dam and formulate recommendations with respect to the model parameters. To establish admissible ranges of the model parameters in line with the current guidelines for seismic safety, load cases corresponding to return periods for the dam classification are used to attain target performance limit states.<br/></div> © 2021 New Zealand Society for Earthquake Engineering. All rights reserved.},\nkey = {Numerical models},\n%keywords = {Machine learning;Uncertainty analysis;Learning systems;Seismic waves;Seismology;Gravity dams;Concrete dams;},\n%note = {Computational burden;Conditional probabilities;Machine learning techniques;Probabilistic framework;Response surface metamodel;Seismic fragility analysis;Seismic Performance;Sources of uncertainty;},\nURL = {http://dx.doi.org/10.5459/bnzsee.54.2.58-68},\n} \n\n\n
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Methods for the seismic analysis of dams have improved extensively in the last several decades. Advanced numerical models have become more feasible and constitute the basis of improved procedures for design and assessment. A probabilistic framework is required to manage the various sources of uncertainty that may impact system performance and fragility analysis is a promising approach for depicting conditional probabilities of limit state exceedance under such uncertainties. However, the effect of model parameter variation on the seismic fragility analysis of structures with complex numerical models, such as dams, is frequently overlooked due to the costly and time-consuming revaluation of the numerical model. To improve the seismic assessment of such structures by jointly reducing the computational burden, this study proposes the implementation of a polynomial response surface metamodel to emulate the response of the system. The latter will be computationally and visually validated and used to predict the continuous relative maximum base sliding of the dam in order to build fragility functions and show the effect of modelling parameter variation. The resulting fragility functions are used to assess the seismic performance of the dam and formulate recommendations with respect to the model parameters. To establish admissible ranges of the model parameters in line with the current guidelines for seismic safety, load cases corresponding to return periods for the dam classification are used to attain target performance limit states.
© 2021 New Zealand Society for Earthquake Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Numerical and Experimental Evaluations of Cooling Strategies and Environmental Sustainability for the Cut-out Aluminum Reduction Pot.\n \n \n \n \n\n\n \n Diop, M. A.; Fafard, M.; and Shi, Z.\n\n\n \n\n\n\n Journal of Sustainable Metallurgy, 7(2): 718 - 731. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212410480281 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical and Experimental Evaluations of Cooling Strategies and Environmental Sustainability for the Cut-out Aluminum Reduction Pot},\njournal = {Journal of Sustainable Metallurgy},\nauthor = {Diop, Mouhamadou A. and Fafard, Mario and Shi, Zhongning},\nvolume = {7},\nnumber = {2},\nyear = {2021},\npages = {718 - 731},\nissn = {21993823},\nabstract = {<div data-language="eng" data-ev-field="abstract">This study aims to design and implement an efficient cooling system to reduce the shutdown pot's cooling time in the smelter's delining room. This cooling process requirement is a result of the usual delay between the cut-down of a pot and the start of the pot demolition process that would have to be left to cool down from a temperature of about 960 °C to a temperature with which the delining team can physically handle it. As the cooling process is currently carried out in a free convection environment, the process takes five to nine days, causing the pot to spend a significant amount of time in the repair room. On the other hand, environmental regulation does not allow aluminum smelting plants to leave the hot pot in the open air; it has to be in a room enclosure. In developing a cooling technique that reduces the pot's cooling time and flue gas releases after shutting down, it is essential to ensure that the mechanical integrity of the potshell is maintained. To this effect, this study was kicked off by experimental studies to deduce the effect of various cooling parameters on the potshell material's microstructure and mechanical properties. Subsequently, 3D Finite Element Heat Transfer (FEHT) models of the DX technology pot were developed. On-site measurements were carried out on the DX pot at the plant and used to validate the models and validate the cooling techniques' effectiveness and their efficiency in reducing energy consumption. The models developed are useful in working out suitable and sustainable heat transfer mechanisms for efficient potline management to achieve acceptably low social and environmental impacts. Graphical Abstract: [Figure not available: see fulltext.].<br/></div> © 2021, The Minerals, Metals & Materials Society.},\nkey = {Cooling},\n%keywords = {Energy utilization;Environmental impact;Smelting;Plants (botany);Plant shutdowns;Sustainable development;Energy efficiency;Environmental regulations;Aluminum;},\n%note = {Design and implements;Environmental sustainability;Experimental evaluation;Heat transfer mechanism;Mechanical integrity;Microstructure and mechanical properties;Reducing energy consumption;Social and environmental impact;},\nURL = {http://dx.doi.org/10.1007/s40831-021-00373-z},\n} \n\n\n
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This study aims to design and implement an efficient cooling system to reduce the shutdown pot's cooling time in the smelter's delining room. This cooling process requirement is a result of the usual delay between the cut-down of a pot and the start of the pot demolition process that would have to be left to cool down from a temperature of about 960 °C to a temperature with which the delining team can physically handle it. As the cooling process is currently carried out in a free convection environment, the process takes five to nine days, causing the pot to spend a significant amount of time in the repair room. On the other hand, environmental regulation does not allow aluminum smelting plants to leave the hot pot in the open air; it has to be in a room enclosure. In developing a cooling technique that reduces the pot's cooling time and flue gas releases after shutting down, it is essential to ensure that the mechanical integrity of the potshell is maintained. To this effect, this study was kicked off by experimental studies to deduce the effect of various cooling parameters on the potshell material's microstructure and mechanical properties. Subsequently, 3D Finite Element Heat Transfer (FEHT) models of the DX technology pot were developed. On-site measurements were carried out on the DX pot at the plant and used to validate the models and validate the cooling techniques' effectiveness and their efficiency in reducing energy consumption. The models developed are useful in working out suitable and sustainable heat transfer mechanisms for efficient potline management to achieve acceptably low social and environmental impacts. Graphical Abstract: [Figure not available: see fulltext.].
© 2021, The Minerals, Metals & Materials Society.\n
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\n \n\n \n \n \n \n \n \n Optimal seismic isolation characteristics for bridges in moderate and high seismicity areas.\n \n \n \n \n\n\n \n Nguyen, X. D.; and Guizani, L.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 48(6): 642 - 655. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"OptimalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212310469820 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Optimal seismic isolation characteristics for bridges in moderate and high seismicity areas},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Nguyen, Xuan Dai and Guizani, Lotfi},\nvolume = {48},\nnumber = {6},\nyear = {2021},\npages = {642 - 655},\nissn = {03151468},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper aims to identify the optimal properties of seismic isolation systems (SISs) for bridges in moderate seismicity areas (MSAs) and high seismicity areas (HSAs). Amplitude and spectral parameters of ground motions are proposed to identify these areas. A parametric study, with varying SIS properties, is carried out, and the seismic isolation performance is evaluated for several locations within MSAs and HSAs in North America and Europe. The optimal characteristic strength, Q<inf>d</inf>, and post-elastic stiffness, K<inf>d</inf>, of SISs are determined for each seismic area class to minimize seismic forces and displacement demands. Results indicate that ground motions for MSAs have a rich high frequency content, causing seismic acceleration spectrum to decrease more rapidly with the elongation of the structure period. SISs with low-to-moderate energy dissipation capacities show the best performance for MSAs, while HSAs require SISs with higher damping capacities. Ranges for optimal Q<inf>d</inf> and K<inf>d</inf> of SISs for bridges in MSAs and HSAs are proposed.<br/></div> © 2021, Canadian Science Publishing. All rights reserved.},\nkey = {Energy dissipation},\n%note = {Displacement demand;Elastic stiffness;Energy dissipation capacities;High frequency HF;Optimal properties;Seismic accelerations;Seismic isolation systems;Spectral parameters;},\nURL = {http://dx.doi.org/10.1139/cjce-2020-0058},\n} \n\n\n
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This paper aims to identify the optimal properties of seismic isolation systems (SISs) for bridges in moderate seismicity areas (MSAs) and high seismicity areas (HSAs). Amplitude and spectral parameters of ground motions are proposed to identify these areas. A parametric study, with varying SIS properties, is carried out, and the seismic isolation performance is evaluated for several locations within MSAs and HSAs in North America and Europe. The optimal characteristic strength, Qd, and post-elastic stiffness, Kd, of SISs are determined for each seismic area class to minimize seismic forces and displacement demands. Results indicate that ground motions for MSAs have a rich high frequency content, causing seismic acceleration spectrum to decrease more rapidly with the elongation of the structure period. SISs with low-to-moderate energy dissipation capacities show the best performance for MSAs, while HSAs require SISs with higher damping capacities. Ranges for optimal Qd and Kd of SISs for bridges in MSAs and HSAs are proposed.
© 2021, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Geotechnical and geoenvironmental engineering education during the pandemic.\n \n \n \n \n\n\n \n Jiang, N.; Hanson, J. L.; Vecchia, G. D.; Zhu, C.; Yi, Y.; Arnepalli, D. N.; Courcelles, B.; He, J.; Horpibulsuk, S.; Hoy, M.; Takahashi, A.; Arulrajah, A.; Lin, C.; Dowoud, O.; Li, Z.; Gao, Z.; Hata, T.; Zhang, L.; Du, Y.; Goli, V. S. N. S.; Mohammad, A.; Singh, P.; Kuntikana, G.; and Singh, D. N.\n\n\n \n\n\n\n Environmental Geotechnics, 8(3): 233 - 243. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"GeotechnicalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212210440751 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Geotechnical and geoenvironmental engineering education during the pandemic},\njournal = {Environmental Geotechnics},\nauthor = {Jiang, Ning-Jun and Hanson, James L. and Vecchia, Gabriele Della and Zhu, Cheng and Yi, Yaolin and Arnepalli, Dali N. and Courcelles, Benoit and He, Jia and Horpibulsuk, Suksun and Hoy, Menglim and Takahashi, Akihiro and Arulrajah, Arul and Lin, Chih-Ping and Dowoud, Osama and Li, Zili and Gao, Zhiwei and Hata, Toshiro and Zhang, Limin and Du, Yan-Jun and Goli, Venkata Siva Naga Sai and Mohammad, Arif and Singh, Prithvendra and Kuntikana, Ganaraj and Singh, Devendra N.},\nvolume = {8},\nnumber = {3},\nyear = {2021},\npages = {233 - 243},\nissn = {2051803X},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper reports the impact of coronavirus disease 2019 on the practice and delivery of geotechnical and geoenvironmental engineering (GGE) education modules, including lectures, lab sessions, student assessments and research activities, based on the feedback from faculty members in 14 countries/regions around the world. Faculty members have since adopted a series of contingent measures to enhance teaching and learning experience during the pandemic, which includes facilitating active learning, exploring new teaching content related to public health, expanding e-learning resources, implementing more engaged and student-centred assessment and delivering high-impact integrated education and research. The key challenges that faculty members are facing appear to be how to maximise the flexibility of learning and meet physical distancing requirements without compromising learning outcomes, education equity and interpersonal interactions in the traditional face-to-face teaching. Despite the challenges imposed by the pandemic, this could also be a good opportunity for faculty members obliged to lecture, to rethink and revise the existing contents and approaches of professing GGE education. Three future opportunities namely, smart learning, flipped learning and interdisciplinary education, are identified. The changes could potentially provide students with a more resilient, engaged, interactive and technology-based learning environment.<br/></div> © 2021 ICE Publishing: All rights reserved.},\nkey = {Geotechnical engineering},\n%keywords = {Computer aided instruction;Engineering education;Public policy;Students;Teaching;},\n%note = {Activity-based;Assessment activities;Education module;Faculty members;Geoenvironment;Geoenvironmental engineering;Geotechnical;Research activities;Student assessment;Student research;},\nURL = {http://dx.doi.org/10.1680/jenge.20.00086},\n} \n\n\n
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This paper reports the impact of coronavirus disease 2019 on the practice and delivery of geotechnical and geoenvironmental engineering (GGE) education modules, including lectures, lab sessions, student assessments and research activities, based on the feedback from faculty members in 14 countries/regions around the world. Faculty members have since adopted a series of contingent measures to enhance teaching and learning experience during the pandemic, which includes facilitating active learning, exploring new teaching content related to public health, expanding e-learning resources, implementing more engaged and student-centred assessment and delivering high-impact integrated education and research. The key challenges that faculty members are facing appear to be how to maximise the flexibility of learning and meet physical distancing requirements without compromising learning outcomes, education equity and interpersonal interactions in the traditional face-to-face teaching. Despite the challenges imposed by the pandemic, this could also be a good opportunity for faculty members obliged to lecture, to rethink and revise the existing contents and approaches of professing GGE education. Three future opportunities namely, smart learning, flipped learning and interdisciplinary education, are identified. The changes could potentially provide students with a more resilient, engaged, interactive and technology-based learning environment.
© 2021 ICE Publishing: All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Reliability assessment of existing transmission line towers considering mechanical model uncertainties.\n \n \n \n \n\n\n \n de Souza, R. R.; Miguel, L. F. F.; McClure, G.; Alminhana, F.; and Kaminski, J.\n\n\n \n\n\n\n Engineering Structures, 237. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ReliabilityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211810300015 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Reliability assessment of existing transmission line towers considering mechanical model uncertainties},\njournal = {Engineering Structures},\nauthor = {de Souza, Rafael Rodrigues and Miguel, Leandro Fleck Fadel and McClure, Ghyslaine and Alminhana, Fabio and Kaminski, Joao},\nvolume = {237},\nyear = {2021},\nissn = {01410296},\nabstract = {<div data-language="eng" data-ev-field="abstract">Reliability assessment of transmission line towers (TLTs) becomes particularly important in the context of the growing demand for increasing the energy transport capacity of existing lines. However, a comprehensive literature survey in this field reveals that important discrepancies may exist between the original design model analysis results and the actual lattice steel tower behavior. For instance, it has been demonstrated (Kaminski-Jr, 2007; CIGRE, 2009; Souza et al., 2019, 2020) that bolt slippage effects, which are disregarded in the current industrial practice, is importantly impacted by the tower topology that is defined by the tower engineer based on experience. Therefore, because several existing structures have topologies prone to connections’ slippage, they may be operating with a lower reliability when compared to modern recommended values. Within this context, the main goal of this paper is to assess the structural reliability of existing TLTs considering mechanical model uncertainties induced by connection details. For this purpose, the failure probability of two real TLTs built in Brazil are investigated employing different levels of structural modeling complexity. The first tower was designed 40 years ago and, several TLs operating in Brazil have adopted a similar design. The second is a newer structure, designed 15 years ago. In addition, to better understand the impact on the results when following the classical design procedure, the progressive collapse of both TLTs is modelled through a full material and geometric nonlinear analysis with and without the consideration of bolt-slippage effects. The results show that the older tower design, which presents a topology highly impacted by bolt slippage, is associated with a lower reliability than the current target values.<br/></div> © 2021 Elsevier Ltd},\nkey = {Bolts},\n%keywords = {Electric power transmission;Topology;Uncertainty analysis;Electric lines;Structural design;Transmissions;Towers;Nonlinear analysis;Reliability analysis;},\n%note = {'current;Energy-transport;Growing demand;Literature survey;Mechanical modeling;Model uncertainties;Reliability assessments;Slippage effect;Transmission line towers;Transport capacity;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.112016},\n} \n\n\n
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Reliability assessment of transmission line towers (TLTs) becomes particularly important in the context of the growing demand for increasing the energy transport capacity of existing lines. However, a comprehensive literature survey in this field reveals that important discrepancies may exist between the original design model analysis results and the actual lattice steel tower behavior. For instance, it has been demonstrated (Kaminski-Jr, 2007; CIGRE, 2009; Souza et al., 2019, 2020) that bolt slippage effects, which are disregarded in the current industrial practice, is importantly impacted by the tower topology that is defined by the tower engineer based on experience. Therefore, because several existing structures have topologies prone to connections’ slippage, they may be operating with a lower reliability when compared to modern recommended values. Within this context, the main goal of this paper is to assess the structural reliability of existing TLTs considering mechanical model uncertainties induced by connection details. For this purpose, the failure probability of two real TLTs built in Brazil are investigated employing different levels of structural modeling complexity. The first tower was designed 40 years ago and, several TLs operating in Brazil have adopted a similar design. The second is a newer structure, designed 15 years ago. In addition, to better understand the impact on the results when following the classical design procedure, the progressive collapse of both TLTs is modelled through a full material and geometric nonlinear analysis with and without the consideration of bolt-slippage effects. The results show that the older tower design, which presents a topology highly impacted by bolt slippage, is associated with a lower reliability than the current target values.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Seismic Site Effect Investigation for Future Moonquake-Resistant Structures by Considering Geometrical and Geotechnical Characteristics of Lunar Bases.\n \n \n \n \n\n\n \n Amini, D.; Liu, H.; and Maghoul, P.\n\n\n \n\n\n\n In pages 724 - 731, Seattle, WA, United states, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20211810276865 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Site Effect Investigation for Future Moonquake-Resistant Structures by Considering Geometrical and Geotechnical Characteristics of Lunar Bases},\njournal = {Earth and Space 2021: Space Exploration, Utilization, Engineering, and Construction in Extreme Environments - Selected Papers from the 17th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments},\nauthor = {Amini, Dana and Liu, Hongwei and Maghoul, Pooneh},\nyear = {2021},\npages = {724 - 731},\naddress = {Seattle, WA, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">The near-surface lunar characterization and seismic site effect analysis plays an important role in the establishment of future human colonization on the Moon. NASA, CSA, and other agencies are following an ambitious program to "go to the Moon to stay, by 2024."The seismic experiments data collected during the Surveyor, Apollo, and Luna missions provided preliminary information of the lunar inner structure and corresponding mechanical properties. The collected seismic data can be used to generate a dispersion image of the lunar subsurface. In this paper, the mechanical properties of each layer are determined firstly through the proposed surface wave inversion algorithm. The inversion applies the spectral element method and the trust region method, which effectively reduces the difference (Euclidean distance) between the measured and predicted data. Then, a two-dimensional (2D) seismic site effect analysis is performed based on the predicted lunar soil properties using HYBRID FE/BE numerical code. The seismic responses are obtained for various predefined geometrical points at the Moon surface. The results can be used as a preliminary seismic site effect evaluation for future resilient infrastructure subjected to impact or moonquake.<br/></div> © 2021 ASCE.},\nkey = {NASA},\n%keywords = {Surface waves;Lunar missions;Geophysical prospecting;Seismology;},\n%note = {Euclidean distance;Geotechnical characteristics;Preliminary information;Seismic site effect;Spectral element method;Surface wave inversion;Trust-region methods;Two Dimensional (2 D);},\nURL = {http://dx.doi.org/10.1061/9780784483374.067},\n} \n\n\n
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The near-surface lunar characterization and seismic site effect analysis plays an important role in the establishment of future human colonization on the Moon. NASA, CSA, and other agencies are following an ambitious program to \"go to the Moon to stay, by 2024.\"The seismic experiments data collected during the Surveyor, Apollo, and Luna missions provided preliminary information of the lunar inner structure and corresponding mechanical properties. The collected seismic data can be used to generate a dispersion image of the lunar subsurface. In this paper, the mechanical properties of each layer are determined firstly through the proposed surface wave inversion algorithm. The inversion applies the spectral element method and the trust region method, which effectively reduces the difference (Euclidean distance) between the measured and predicted data. Then, a two-dimensional (2D) seismic site effect analysis is performed based on the predicted lunar soil properties using HYBRID FE/BE numerical code. The seismic responses are obtained for various predefined geometrical points at the Moon surface. The results can be used as a preliminary seismic site effect evaluation for future resilient infrastructure subjected to impact or moonquake.
© 2021 ASCE.\n
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\n \n\n \n \n \n \n \n \n Enhanced weakly-compressible MPS method for immersed granular flows.\n \n \n \n \n\n\n \n Jandaghian, M.; Krimi, A.; and Shakibaeinia, A.\n\n\n \n\n\n\n Advances in Water Resources, 152. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EnhancedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211810278114 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Enhanced weakly-compressible MPS method for immersed granular flows},\njournal = {Advances in Water Resources},\nauthor = {Jandaghian, Mojtaba and Krimi, Abdelkader and Shakibaeinia, Ahmad},\nvolume = {152},\nyear = {2021},\nissn = {03091708},\nabstract = {<div data-language="eng" data-ev-field="abstract">We develop and validate a three-dimensional particle method based on an Enhanced Weakly-Compressible MPS approach for modeling immersed dense granular flows. For this purpose, we adopt a generalized rheological model, using a regularized visco-inertial rheology, for all regimes of multiphase granular flow. Moreover, we propose a new consistent formulation to estimate the effective pressure of the solid skeleton based on the continuity equation of the pore-water. To improve the accuracy of the multiphase particle methods, especially near boundaries and interfaces, we introduce a modified high-order diffusive term by employing the convergent form of the Laplacian operator. The effectiveness of the new diffusive term is particularly demonstrated by modeling the hydrostatic pressure of two fluid phases. Further, coupling the generalized rheology model with the flow equations, we investigate the gravity-driven granular flows in the immersed granular collapse and slide in three dimensions. As a part of this study, we represent the experiment on the immersed granular collapse to validate the model. The evolution and runout length of the granular bulk are compared with those from experiments confirming good compatibility. Overall, the qualitative and quantitative results justify the proposed developments shown to be essential for predicting different states of the immersed granular flows.<br/></div> © 2021},\nkey = {Hydrostatic pressure},\n%keywords = {Granular materials;Confined flow;Mathematical operators;Elasticity;Hydraulics;},\n%note = {Dense granular flows;Granular collapse;Granular flows;Meshfree particle method;MPS methods;Multiphase granular flows;Multiphases;Particle methods;Rheological modeling;Weakly compressible moving particle semi-implicit method;},\nURL = {http://dx.doi.org/10.1016/j.advwatres.2021.103908},\n} \n\n\n
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We develop and validate a three-dimensional particle method based on an Enhanced Weakly-Compressible MPS approach for modeling immersed dense granular flows. For this purpose, we adopt a generalized rheological model, using a regularized visco-inertial rheology, for all regimes of multiphase granular flow. Moreover, we propose a new consistent formulation to estimate the effective pressure of the solid skeleton based on the continuity equation of the pore-water. To improve the accuracy of the multiphase particle methods, especially near boundaries and interfaces, we introduce a modified high-order diffusive term by employing the convergent form of the Laplacian operator. The effectiveness of the new diffusive term is particularly demonstrated by modeling the hydrostatic pressure of two fluid phases. Further, coupling the generalized rheology model with the flow equations, we investigate the gravity-driven granular flows in the immersed granular collapse and slide in three dimensions. As a part of this study, we represent the experiment on the immersed granular collapse to validate the model. The evolution and runout length of the granular bulk are compared with those from experiments confirming good compatibility. Overall, the qualitative and quantitative results justify the proposed developments shown to be essential for predicting different states of the immersed granular flows.
© 2021\n
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\n \n\n \n \n \n \n \n \n Apollo Seismic Data Interpretation Using an Elastodynamic Space-Time Spectral Element Technique and Dispersion Image Inversion Method.\n \n \n \n \n\n\n \n Liu, H.; and Maghoul, P.\n\n\n \n\n\n\n In pages 99 - 107, Seattle, WA, United states, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"ApolloPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20211810276909 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Apollo Seismic Data Interpretation Using an Elastodynamic Space-Time Spectral Element Technique and Dispersion Image Inversion Method},\njournal = {Earth and Space 2021: Space Exploration, Utilization, Engineering, and Construction in Extreme Environments - Selected Papers from the 17th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments},\nauthor = {Liu, Hongwei and Maghoul, Pooneh},\nyear = {2021},\npages = {99 - 107},\naddress = {Seattle, WA, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">The data collected during the Apollo seismic experiments can provide important information regarding the lunar subsurface conditions and the corresponding mechanical properties. This paper aims to determine the shear wave velocity of the shallow subsurface using an elastodynamic space-time spectral element forward solver and the trust region reflective algorithm for back-calculation. The elastodynamic forward solver provides a semi-analytical solution for the wave propagation through subsurface materials. The trust region reflective algorithm is a bounded non-linear least square algorithm that effectively reduces the difference (Euclidean distance) between measured and predicted data by iteratively improving the prediction of material properties. In this paper, the seismic data is used to generate a dispersion image of the lunar subsurface, which provides the relation between the phase (group) velocity and frequency. Such dispersion images can be used to derive the shear wave velocity in each layer.<br/></div> © 2021 ASCE.},\nkey = {Wave propagation},\n%keywords = {Seismic waves;Shear waves;Seismic response;Dispersion (waves);Geophysical prospecting;Acoustic wave velocity;Dispersions;Shear flow;Iterative methods;},\n%note = {Euclidean distance;Non-linear least squares;Seismic data interpretations;Semi-analytical solution;Shallow subsurface;Shear wave velocity;Sub-surface materials;Subsurface conditions;},\nURL = {http://dx.doi.org/10.1061/9780784483374.010},\n} \n\n\n
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The data collected during the Apollo seismic experiments can provide important information regarding the lunar subsurface conditions and the corresponding mechanical properties. This paper aims to determine the shear wave velocity of the shallow subsurface using an elastodynamic space-time spectral element forward solver and the trust region reflective algorithm for back-calculation. The elastodynamic forward solver provides a semi-analytical solution for the wave propagation through subsurface materials. The trust region reflective algorithm is a bounded non-linear least square algorithm that effectively reduces the difference (Euclidean distance) between measured and predicted data by iteratively improving the prediction of material properties. In this paper, the seismic data is used to generate a dispersion image of the lunar subsurface, which provides the relation between the phase (group) velocity and frequency. Such dispersion images can be used to derive the shear wave velocity in each layer.
© 2021 ASCE.\n
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\n \n\n \n \n \n \n \n \n Statistics and prediction of vehicle–bridge collisions in Quebec.\n \n \n \n \n\n\n \n Berton, E.; Bouaanani, N.; Lamarche, C.; and Roy, N.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 48(4): 411 - 428. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"StatisticsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211510210419 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Statistics and prediction of vehicle–bridge collisions in Quebec},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Berton, E. and Bouaanani, N. and Lamarche, C.-P. and Roy, N.},\nvolume = {48},\nnumber = {4},\nyear = {2021},\npages = {411 - 428},\nissn = {03151468},\nabstract = {<div data-language="eng" data-ev-field="abstract">Vehicle–bridge collisions (VBCs) can compromise the safety of road users and cause major economic losses. This paper proposes and applies a methodology to investigate such events in Quebec. Relevant data have been collected from various sources and merged to provide a comprehensive database of VBCs that occurred in Quebec between 2000 and 2016. The developed database was used to carry out statistical analyses highlighting the main factors characterizing VBCs, such as vehicle’s body type, bridge dimensions, prescribed speed limit, road configuration, road surface condition and lighting. The compiled database was georeferenced in an upgradable map that can be used efficiently to visualize the distribution and evolution of VBCs over a given region of Quebec. A VBC regression model was also developed based on k-fold crossvalidation. The proposed model can be updated regularly as new VBCs are reported and then used to identify bridges most likely to be affected by VBCs or prioritize actions to reduce the potential consequences.<br/></div> © 2021, Canadian Science Publishing. All rights reserved.},\nkey = {Roads and streets},\n%keywords = {Losses;Database systems;Regression analysis;Vehicles;},\n%note = {Cross validation;Economic loss;Most likely;Regression model;Road surface condition;Road users;Speed limit;},\nURL = {http://dx.doi.org/10.1139/cjce-2018-0785},\n} \n\n\n
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Vehicle–bridge collisions (VBCs) can compromise the safety of road users and cause major economic losses. This paper proposes and applies a methodology to investigate such events in Quebec. Relevant data have been collected from various sources and merged to provide a comprehensive database of VBCs that occurred in Quebec between 2000 and 2016. The developed database was used to carry out statistical analyses highlighting the main factors characterizing VBCs, such as vehicle’s body type, bridge dimensions, prescribed speed limit, road configuration, road surface condition and lighting. The compiled database was georeferenced in an upgradable map that can be used efficiently to visualize the distribution and evolution of VBCs over a given region of Quebec. A VBC regression model was also developed based on k-fold crossvalidation. The proposed model can be updated regularly as new VBCs are reported and then used to identify bridges most likely to be affected by VBCs or prioritize actions to reduce the potential consequences.
© 2021, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Resilience-based optimization model for maintenance and rehabilitation of pavement networks in a freeze–thaw environment.\n \n \n \n \n\n\n \n Mohammed, A.; Abu-Samra, S.; Zayed, T.; Bagchi, A.; and Nasiri, F.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 48(4): 399 - 410. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"Resilience-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211510210424 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Resilience-based optimization model for maintenance and rehabilitation of pavement networks in a freeze–thaw environment},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Mohammed, Ahmed and Abu-Samra, Soliman and Zayed, Tarek and Bagchi, Ashutosh and Nasiri, Fuzhan},\nvolume = {48},\nnumber = {4},\nyear = {2021},\npages = {399 - 410},\nissn = {03151468},\nabstract = {<div data-language="eng" data-ev-field="abstract">According to the Canada infrastructure report 2016, 62.6% of roads in Canada are in a good condition, nevertheless, with current investment rates, significant road networks will suffer a decline in their condition and will be vulnerable to sudden failure. Accordingly, this paper tackles the pavement resilience from an asset management perspective and aims at developing a resilience-based asset management framework for pavement networks. This was carried out through the development of five components: (i) a central database of asset inventory, (ii) a pavement condition and level of service assessment models, (iii) a regression of the effect of freeze–thaw on pavement network, (iv) a financial and temporal models, and (v) an optimization model to formulate the mathematical denotation for the proposed resilience assessment approach and integrate the above components. The model results were promising in terms of maintaining pavement resiliency by selecting a near optimal intervention plan that meets the municipality limitations.<br/></div> © 2021, Canadian Science Publishing. All rights reserved.},\nkey = {Asset management},\n%keywords = {Optimization;Pavements;Thawing;Highway administration;Investments;},\n%note = {Assessment approaches;Assessment models;Level of Service;Maintenance and rehabilitations;Management frameworks;Mathematical denotations;Optimization modeling;Pavement condition;},\nURL = {http://dx.doi.org/10.1139/cjce-2019-0559},\n} \n\n\n
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According to the Canada infrastructure report 2016, 62.6% of roads in Canada are in a good condition, nevertheless, with current investment rates, significant road networks will suffer a decline in their condition and will be vulnerable to sudden failure. Accordingly, this paper tackles the pavement resilience from an asset management perspective and aims at developing a resilience-based asset management framework for pavement networks. This was carried out through the development of five components: (i) a central database of asset inventory, (ii) a pavement condition and level of service assessment models, (iii) a regression of the effect of freeze–thaw on pavement network, (iv) a financial and temporal models, and (v) an optimization model to formulate the mathematical denotation for the proposed resilience assessment approach and integrate the above components. The model results were promising in terms of maintaining pavement resiliency by selecting a near optimal intervention plan that meets the municipality limitations.
© 2021, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Life cycle assessment and life cycle costing of multistorey building: Attributional and consequential perspectives.\n \n \n \n \n\n\n \n Fauzi, R. T.; Lavoie, P.; Tanguy, A.; and Amor, B.\n\n\n \n\n\n\n Building and Environment, 197. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"LifePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211510188227 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Life cycle assessment and life cycle costing of multistorey building: Attributional and consequential perspectives},\njournal = {Building and Environment},\nauthor = {Fauzi, Rizal Taufiq and Lavoie, Patrick and Tanguy, Audrey and Amor, Ben},\nvolume = {197},\nyear = {2021},\nissn = {03601323},\nabstract = {<div data-language="eng" data-ev-field="abstract">Buildings are accountable for much of the resource consumption and CO<inf>2</inf> emissions generated from human activities. Nonetheless, the focus of building life cycle assessment (LCA) studies to evaluate the environmental footprint are more commonly adopted in an attributional approach. Nevertheless, understanding a direct and indirect consequences in larger system using consequential approach is also needed for policy-making. Rather small body of existing literature has been found on the implementation of consequential LCA and life cycle costing (LCC) in the building sector. In this study, attributional and consequential approach are performed for hybrid wood multistorey building. The results showed that with attributional approach, the phase that contributed the environmental impacts the most in climate change category is the production phase yet it became the use phase if consequential approach is used. By performing consequential LCA-LCC the possible hidden impacts can be uncovered and sufficient insights into the indirect impacts can be seen, thereby offering stakeholders the opportunity to avoid such future consequences.<br/></div> © 2021 Elsevier Ltd},\nkey = {Life cycle},\n%keywords = {Costs;Office buildings;Climate change;Environmental impact;},\n%note = {Attributional;Building life cycle;CO$-2$/ emission;Consequential;Consequential life-cycle assessment;Human activities;LCSA;Life cycle costing;Multistorey buildings;Resources consumption;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2021.107836},\n} \n\n\n
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Buildings are accountable for much of the resource consumption and CO2 emissions generated from human activities. Nonetheless, the focus of building life cycle assessment (LCA) studies to evaluate the environmental footprint are more commonly adopted in an attributional approach. Nevertheless, understanding a direct and indirect consequences in larger system using consequential approach is also needed for policy-making. Rather small body of existing literature has been found on the implementation of consequential LCA and life cycle costing (LCC) in the building sector. In this study, attributional and consequential approach are performed for hybrid wood multistorey building. The results showed that with attributional approach, the phase that contributed the environmental impacts the most in climate change category is the production phase yet it became the use phase if consequential approach is used. By performing consequential LCA-LCC the possible hidden impacts can be uncovered and sufficient insights into the indirect impacts can be seen, thereby offering stakeholders the opportunity to avoid such future consequences.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Accounting for uncertainties in the safety assessment of concrete gravity dams: A probabilistic approach with sample optimization.\n \n \n \n \n\n\n \n Segura, R. L.; Miquel, B.; Paultre, P.; and Padgett, J. E.\n\n\n \n\n\n\n Water (Switzerland), 13(6). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"AccountingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211410177108 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Accounting for uncertainties in the safety assessment of concrete gravity dams: A probabilistic approach with sample optimization},\njournal = {Water (Switzerland)},\nauthor = {Segura, Rocio L. and Miquel, Benjamin and Paultre, Patrick and Padgett, Jamie E.},\nvolume = {13},\nnumber = {6},\nyear = {2021},\nissn = {20734441},\nabstract = {<div data-language="eng" data-ev-field="abstract">Important advances have been made in the methodologies for assessing the safety of dams, resulting in the review and modification of design guidelines. Many existing dams fail to meet these revised criteria, and structural rehabilitation to achieve the updated standards may be costly and difficult. To this end, probabilistic methods have emerged as a promising alternative and constitute the basis of more adequate procedures of design and assessment. However, such methods, in addition to being computationally expensive, can produce very different solutions, depending on the input parameters, which can greatly influence the final results. Addressing the existing challenges of these procedures to analyze the stability of concrete dams, this study proposes a probabilistic-based methodology for assessing the safety of dams under usual, unusual, and extreme loading conditions. The proposed procedure allows the analysis to be updated while avoiding unnecessary simulation runs by classifying the load cases according to the annual probability of exceedance and by using an efficient progressive sampling strategy. In addition, a variance-based global sensitivity analysis is performed to identify the parameters most affecting the dam stability, and the parameter ranges that meet the safety guidelines are formulated. It is observed that the proposed methodology is more robust, more computationally efficient, and more easily interpretable than conventional methods.<br/></div> © 2021 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Gravity dams},\n%keywords = {Concrete dams;Concretes;Uncertainty analysis;Sensitivity analysis;Safety engineering;},\n%note = {Annual probabilities;Computationally efficient;Concrete gravity dams;Conventional methods;Probabilistic approaches;Probabilistic methods;Structural rehabilitation;Variance-based global sensitivity analysis;},\nURL = {http://dx.doi.org/10.3390/w13060855},\n} \n\n\n
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Important advances have been made in the methodologies for assessing the safety of dams, resulting in the review and modification of design guidelines. Many existing dams fail to meet these revised criteria, and structural rehabilitation to achieve the updated standards may be costly and difficult. To this end, probabilistic methods have emerged as a promising alternative and constitute the basis of more adequate procedures of design and assessment. However, such methods, in addition to being computationally expensive, can produce very different solutions, depending on the input parameters, which can greatly influence the final results. Addressing the existing challenges of these procedures to analyze the stability of concrete dams, this study proposes a probabilistic-based methodology for assessing the safety of dams under usual, unusual, and extreme loading conditions. The proposed procedure allows the analysis to be updated while avoiding unnecessary simulation runs by classifying the load cases according to the annual probability of exceedance and by using an efficient progressive sampling strategy. In addition, a variance-based global sensitivity analysis is performed to identify the parameters most affecting the dam stability, and the parameter ranges that meet the safety guidelines are formulated. It is observed that the proposed methodology is more robust, more computationally efficient, and more easily interpretable than conventional methods.
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Wind-driven rain on buildings: Accuracy of the ISO semi-empirical model.\n \n \n \n \n\n\n \n Souri, F.; Ge, H.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 212. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"Wind-drivenPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211410182395 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind-driven rain on buildings: Accuracy of the ISO semi-empirical model},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Souri, Firouzeh and Ge, Hua and Stathopoulos, Ted},\nvolume = {212},\nyear = {2021},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">Previous studies have shown that the accuracy of the ISO semi-empirical wind-driven rain (WDR) model can be improved by applying more detailed wall factors determined based on high-resolution field measurements. However, discrepancies between measurements and predictions still exist. The availability of high-resolution WDR field data collected over a long period of time makes a detailed analysis possible. Field measurements of WDR on two mid-rise and one high-rise buildings in three Canadian regions over a year and a half were analyzed. Two main factors that can significantly improve the ISO WDR model were identified, i.e. the time resolution (5 ​min data vs. hourly data) and the correction of difference in wind speed and wind direction between the building site and weather station using hourly data. It is recommended to take WDR measurements at shorter-duration and calculate wall factors using both shorter-duration records and hourly averaged data. In general, the ISO model works well if all the differences in wind conditions between site and the weather station can be taken into account. The observed discrepancy can be reduced to within 2% for façades facing the prevailing wind-direction, while to about 60% for façades off the prevailing wind direction in complex urban settings.<br/></div> © 2021 Elsevier Ltd},\nkey = {Rain},\n%keywords = {ISO Standards;Tall buildings;Walls (structural partitions);Wind;Weather information services;},\n%note = {Building facades;Field measurement;High resolution;ISO standards;Rain modeling;Semi-empirical wind-driven rain model;Short durations;Weather stations;Wind-driven rain;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2021.104606},\n} \n\n\n
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Previous studies have shown that the accuracy of the ISO semi-empirical wind-driven rain (WDR) model can be improved by applying more detailed wall factors determined based on high-resolution field measurements. However, discrepancies between measurements and predictions still exist. The availability of high-resolution WDR field data collected over a long period of time makes a detailed analysis possible. Field measurements of WDR on two mid-rise and one high-rise buildings in three Canadian regions over a year and a half were analyzed. Two main factors that can significantly improve the ISO WDR model were identified, i.e. the time resolution (5 ​min data vs. hourly data) and the correction of difference in wind speed and wind direction between the building site and weather station using hourly data. It is recommended to take WDR measurements at shorter-duration and calculate wall factors using both shorter-duration records and hourly averaged data. In general, the ISO model works well if all the differences in wind conditions between site and the weather station can be taken into account. The observed discrepancy can be reduced to within 2% for façades facing the prevailing wind-direction, while to about 60% for façades off the prevailing wind direction in complex urban settings.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n A fully Lagrangian DEM-MPS mesh-free model for ice-wave dynamics.\n \n \n \n \n\n\n \n Amaro, R. A.; Mellado-Cusicahua, A.; Shakibaeinia, A.; and Cheng, L.\n\n\n \n\n\n\n Cold Regions Science and Technology, 186. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211310139973 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A fully Lagrangian DEM-MPS mesh-free model for ice-wave dynamics},\njournal = {Cold Regions Science and Technology},\nauthor = {Amaro, Rubens Augusto and Mellado-Cusicahua, Andrea and Shakibaeinia, Ahmad and Cheng, Liang-Yee},\nvolume = {186},\nyear = {2021},\nissn = {0165232X},\nabstract = {This paper develops and evaluates a novel three-dimensional fully-Lagrangian (particle-based) numerical model, based on the hybrid discrete element method (DEM) and moving particle semi-implicit (MPS) mesh-free techniques, for modeling the highly-dynamic ice-wave interactions. Both MPS and DEM belong to mesh-free Lagrangian (particle) techniques. The model considers ice-wave dynamics as a multiphase continuum-discrete system. While the MPS solves the continuum equations of free-surface flow in a Lagrangian particle-based domain, the DEM uses a multi-sphere Hertzian contact dynamic model to simulate the ice floes motion and interaction. The hybrid model predicts the motion and collision of ice floes as well as their interaction with water, boundaries, and any obstacle in their way. Considering the mesh-free Lagrangian nature of both DEM and MPS, the developed model has an inherent ability to predict the free-drift (absence of internal stress) movements of the ice floes, e.g., sliding, rolling, colliding, and piling-up, in violent free-surface flow. A small-scale and challenging experiment based on dam-break flow over dry and wet beds with floating block floes, which mimics the characteristics of an idealized jam release, has been conducted to provide useful and comprehensive quality data for the validation of the proposed model, as well as other numerical models. Experimental and numerical results of the free-surface profile and the position of the blocks are compared. The results show the ability of the model to numerically reproduce and predict the complex three-dimensional dynamic behavior of wave-ice floes interaction. Overall, this study is a first effort toward developing an ice-wave dynamic within a fully Lagrangian framework (i.e. both flow hydrodynamics and ice dynamics in the Lagrangian particle-based system), and its results can be extended to bring an in-depth understanding of the physics of the real-scale ice-wave or river ice dynamic problems in the future.<br/> © 2021 Elsevier B.V.},\nkey = {Finite difference method},\n%keywords = {Mesh generation;Dynamics;Numerical models;Lagrange multipliers;Numerical methods;Sea ice;},\n%note = {Comprehensive qualities;In-depth understanding;Lagrangian frameworks;Lagrangian particles;Moving particle semi-implicit;Multiphase continuum;Three-dimensional dynamics;Violent free-surface flow;},\nURL = {http://dx.doi.org/10.1016/j.coldregions.2021.103266},\n} \n\n\n
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\n This paper develops and evaluates a novel three-dimensional fully-Lagrangian (particle-based) numerical model, based on the hybrid discrete element method (DEM) and moving particle semi-implicit (MPS) mesh-free techniques, for modeling the highly-dynamic ice-wave interactions. Both MPS and DEM belong to mesh-free Lagrangian (particle) techniques. The model considers ice-wave dynamics as a multiphase continuum-discrete system. While the MPS solves the continuum equations of free-surface flow in a Lagrangian particle-based domain, the DEM uses a multi-sphere Hertzian contact dynamic model to simulate the ice floes motion and interaction. The hybrid model predicts the motion and collision of ice floes as well as their interaction with water, boundaries, and any obstacle in their way. Considering the mesh-free Lagrangian nature of both DEM and MPS, the developed model has an inherent ability to predict the free-drift (absence of internal stress) movements of the ice floes, e.g., sliding, rolling, colliding, and piling-up, in violent free-surface flow. A small-scale and challenging experiment based on dam-break flow over dry and wet beds with floating block floes, which mimics the characteristics of an idealized jam release, has been conducted to provide useful and comprehensive quality data for the validation of the proposed model, as well as other numerical models. Experimental and numerical results of the free-surface profile and the position of the blocks are compared. The results show the ability of the model to numerically reproduce and predict the complex three-dimensional dynamic behavior of wave-ice floes interaction. Overall, this study is a first effort toward developing an ice-wave dynamic within a fully Lagrangian framework (i.e. both flow hydrodynamics and ice dynamics in the Lagrangian particle-based system), and its results can be extended to bring an in-depth understanding of the physics of the real-scale ice-wave or river ice dynamic problems in the future.
© 2021 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Performance-based seismic design and optimization of damper devices for cable-stayed bridge.\n \n \n \n \n\n\n \n Wen, J.; Han, Q.; Xie, Y.; Du, X.; and Zhang, J.\n\n\n \n\n\n\n Engineering Structures, 237. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"Performance-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20211310155583 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance-based seismic design and optimization of damper devices for cable-stayed bridge},\njournal = {Engineering Structures},\nauthor = {Wen, Jianian and Han, Qiang and Xie, Yazhou and Du, Xiuli and Zhang, Jian},\nvolume = {237},\nyear = {2021},\nissn = {01410296},\nabstract = {The seismic vulnerability of cable-stayed bridges located in seismically active regions can be of great concern to the regional safety and resilience. A promising design practice for cable-stayed bridges lies in decoupling the deck from deck-pylon connection and incorporating energy dissipation devices to reduce the dynamic responses. In this study, the performance-based seismic design (PBSD) procedure is adapted to the optimal design of damper devices at the deck-pylon connections in a benchmark cable-stayed bridge. The benchmark cable-stayed bridge was modeled in the OpenSees platform, which was calibrated against the previous finite element models. Then it was seismically designed with viscous and metallic dampers in the longitudinal and transverse direction, respectively. The component-level fragility functions of the cable-stayed bridge were first derived based upon the multiple stripe analysis (MSA) method, and then the system-level repair cost ratio (RCR) surfaces were built under the PBSD framework. Finally, the genetic algorithm based on parallel computation was utilized to identify the optimal parameters of the damper devices. The analysis results illustrate that the optimal design parameters can be effectively obtained through the proposed method, and the damper devices with optimal parameters lead to a significant reduction of the overall repair cost. The study also demonstrates that if the device parameters are not selected appropriately, the dampers can have negative effects on bridge responses. The design framework and the findings could provide the guidance for the designing and retrofitting of cable-stayed bridges in practice.<br/> © 2021 Elsevier Ltd},\nkey = {Genetic algorithms},\n%keywords = {Budget control;Cable stayed bridges;Benchmarking;Optimal systems;Seismology;Energy dissipation;Cables;Cost benefit analysis;Repair;},\n%note = {Benchmark cable-stayed bridges;Cable-stayed bridge;Damper device;Design and optimization;Design frameworks;Fragility function;Optimal design;Optimal parameter;Performance based seismic design;Repair costs;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.112043},\n} \n\n\n
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\n The seismic vulnerability of cable-stayed bridges located in seismically active regions can be of great concern to the regional safety and resilience. A promising design practice for cable-stayed bridges lies in decoupling the deck from deck-pylon connection and incorporating energy dissipation devices to reduce the dynamic responses. In this study, the performance-based seismic design (PBSD) procedure is adapted to the optimal design of damper devices at the deck-pylon connections in a benchmark cable-stayed bridge. The benchmark cable-stayed bridge was modeled in the OpenSees platform, which was calibrated against the previous finite element models. Then it was seismically designed with viscous and metallic dampers in the longitudinal and transverse direction, respectively. The component-level fragility functions of the cable-stayed bridge were first derived based upon the multiple stripe analysis (MSA) method, and then the system-level repair cost ratio (RCR) surfaces were built under the PBSD framework. Finally, the genetic algorithm based on parallel computation was utilized to identify the optimal parameters of the damper devices. The analysis results illustrate that the optimal design parameters can be effectively obtained through the proposed method, and the damper devices with optimal parameters lead to a significant reduction of the overall repair cost. The study also demonstrates that if the device parameters are not selected appropriately, the dampers can have negative effects on bridge responses. The design framework and the findings could provide the guidance for the designing and retrofitting of cable-stayed bridges in practice.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Integration of viscoplastic effects in a one-dimensional constitutive model for ground response analysis.\n \n \n \n \n\n\n \n Yniesta, S.; and Janati-Idrissi, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 58(4): 468 - 478. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"IntegrationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211410158095 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Integration of viscoplastic effects in a one-dimensional constitutive model for ground response analysis},\njournal = {Canadian Geotechnical Journal},\nauthor = {Yniesta, Samuel and Janati-Idrissi, Mallak},\nvolume = {58},\nnumber = {4},\nyear = {2021},\npages = {468 - 478},\nissn = {00083674},\nabstract = {During an earthquake, strain-rate effects affect both the stiffness and damping behaviour of soils, yet existing constitutive models for ground response analysis are typically formulated within a rate-independent framework. In this paper, a one-dimensional (1D) viscoplastic stress–strain model is presented to introduce strain rate effects in ground response analysis. Its constitutive equations are based on a model that uses a cubic spline fit of the modulus reduction curve and a coordinate transformation technique to match any input modulus reduction and damping curve. A viscous stress component is added to model the effect of strain rate on the mechanical behaviour of soils using a single input parameter. The model is able to reproduce the linear increase in shear strength with the logarithm of shear strain rate and allows the introduction of viscous effects in 1D ground response analysis with control over damping and modulus reduction behaviour. The model is implemented in a software for ground response analysis and used to predict the results of a centrifuge test modeling 1D wave propagation. The results show that the model accurately predicts the amplification and attenuation of shear waves, in a context where strain rates impact the response of the model significantly.<br/> © Canadian Science Publishing. All rights reserved.},\nkey = {Constitutive models},\n%keywords = {Centrifuges;Nonlinear analysis;Viscous flow;Shear flow;Constitutive equations;Software testing;Wave propagation;Damping;Shear waves;Strain rate;Shear strain;},\n%note = {1D ground response analysis;Co-ordinate transformation;Ground response analysis;Mechanical behaviour;Modulus reduction;Rate independents;Stiffness and damping;Strain rate effect;},\nURL = {http://dx.doi.org/10.1139/cgj-2019-0717},\n} \n\n\n
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\n During an earthquake, strain-rate effects affect both the stiffness and damping behaviour of soils, yet existing constitutive models for ground response analysis are typically formulated within a rate-independent framework. In this paper, a one-dimensional (1D) viscoplastic stress–strain model is presented to introduce strain rate effects in ground response analysis. Its constitutive equations are based on a model that uses a cubic spline fit of the modulus reduction curve and a coordinate transformation technique to match any input modulus reduction and damping curve. A viscous stress component is added to model the effect of strain rate on the mechanical behaviour of soils using a single input parameter. The model is able to reproduce the linear increase in shear strength with the logarithm of shear strain rate and allows the introduction of viscous effects in 1D ground response analysis with control over damping and modulus reduction behaviour. The model is implemented in a software for ground response analysis and used to predict the results of a centrifuge test modeling 1D wave propagation. The results show that the model accurately predicts the amplification and attenuation of shear waves, in a context where strain rates impact the response of the model significantly.
© Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Enhanced weakly-compressible MPS method for violent free-surface flows: Role of particle regularization techniques.\n \n \n \n \n\n\n \n Jandaghian, M.; Krimi, A.; Zarrati, A. R.; and Shakibaeinia, A.\n\n\n \n\n\n\n Journal of Computational Physics, 434. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EnhancedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211110088119 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Enhanced weakly-compressible MPS method for violent free-surface flows: Role of particle regularization techniques},\njournal = {Journal of Computational Physics},\nauthor = {Jandaghian, Mojtaba and Krimi, Abdelkader and Zarrati, Amir Reza and Shakibaeinia, Ahmad},\nvolume = {434},\nyear = {2021},\nissn = {00219991},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper develops a consistent particle method for capturing the highly non-linear behavior of violent free-surface flows, based on an Enhanced Weakly Compressible Moving Particle Semi-implicit (EWC-MPS) method. It pays special attention to the evaluation and improvement of two particle regularization techniques, namely, pairwise particle collision (PC) and particle shifting (PS). To improve the effectiveness of PC in removing noisy pressure field, and volume conservation issue of PS, we propose and evaluate several enhancements to these techniques, including a novel dynamic PC technique, and a consistent PS algorithm with new boundary treatments and additional terms (in the continuity and momentum equations). Besides, we introduce modified higher-order and anti-symmetric operators for the diffusive and shear force terms. Evaluation of the proposed developments for violent free-surface flow benchmark cases (2D dam-break, 3D water sloshing, and 3D dam-break with an obstacle) confirms an accurate prediction of the flow evolution and rigid body impact, as well as long-term stability of the simulations. The dynamic PC reduces pressure noises with low energy dissipation, and the consistent PS conserves the volume even for extreme deformations. Comparing the role of these new particle regularization techniques demonstrates the effectiveness of both in assuring the uniformity of the particle distribution and pressure fields; nevertheless, the implementation of PS is found to be more complex and time-consuming, mainly due to its need for free surface detection and boundary treatments with several tuning parameters.<br/></div> © 2021 Elsevier Inc.},\nkey = {Convergence of numerical methods},\n%keywords = {Energy dissipation;},\n%note = {Mesh-free particle methods;Moving particle semiimplicit method;Moving-particle semi-implicit methods;Numerical stability and convergence;Particle regularization technique;Regularization technique;Stability and convergence;Violent free-surface flow;Water impact;Weakly compressible moving particle semi-implicit method;},\nURL = {http://dx.doi.org/10.1016/j.jcp.2021.110202},\n} \n\n\n
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This paper develops a consistent particle method for capturing the highly non-linear behavior of violent free-surface flows, based on an Enhanced Weakly Compressible Moving Particle Semi-implicit (EWC-MPS) method. It pays special attention to the evaluation and improvement of two particle regularization techniques, namely, pairwise particle collision (PC) and particle shifting (PS). To improve the effectiveness of PC in removing noisy pressure field, and volume conservation issue of PS, we propose and evaluate several enhancements to these techniques, including a novel dynamic PC technique, and a consistent PS algorithm with new boundary treatments and additional terms (in the continuity and momentum equations). Besides, we introduce modified higher-order and anti-symmetric operators for the diffusive and shear force terms. Evaluation of the proposed developments for violent free-surface flow benchmark cases (2D dam-break, 3D water sloshing, and 3D dam-break with an obstacle) confirms an accurate prediction of the flow evolution and rigid body impact, as well as long-term stability of the simulations. The dynamic PC reduces pressure noises with low energy dissipation, and the consistent PS conserves the volume even for extreme deformations. Comparing the role of these new particle regularization techniques demonstrates the effectiveness of both in assuring the uniformity of the particle distribution and pressure fields; nevertheless, the implementation of PS is found to be more complex and time-consuming, mainly due to its need for free surface detection and boundary treatments with several tuning parameters.
© 2021 Elsevier Inc.\n
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\n \n\n \n \n \n \n \n \n A knowledge-enhanced deep reinforcement learning-based shape optimizer for aerodynamic mitigation of wind-sensitive structures.\n \n \n \n \n\n\n \n Li, S.; Snaiki, R.; and Wu, T.\n\n\n \n\n\n\n Computer-Aided Civil and Infrastructure Engineering, 36(6): 733 - 746. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211110085152 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A knowledge-enhanced deep reinforcement learning-based shape optimizer for aerodynamic mitigation of wind-sensitive structures},\njournal = {Computer-Aided Civil and Infrastructure Engineering},\nauthor = {Li, Shaopeng and Snaiki, Reda and Wu, Teng},\nvolume = {36},\nnumber = {6},\nyear = {2021},\npages = {733 - 746},\nissn = {10939687},\nabstract = {<div data-language="eng" data-ev-field="abstract">Structural shape optimization plays an important role in the design of wind-sensitive structures. The numerical evaluation of aerodynamic performance for each shape search and update during the optimization process typically involves significant computational costs. Accordingly, an effective shape optimization algorithm is needed. In this study, the reinforcement learning (RL) method with deep neural network (DNN)-based policy is utilized for the first time as a shape optimization scheme for aerodynamic mitigation of wind-sensitive structures. In addition, "tacit" domain knowledge is leveraged to enhance the training efficiency. Both the specific direct-domain knowledge and general cross-domain knowledge are incorporated into the deep RL-based aerodynamic shape optimizer via the transfer-learning and meta-learning techniques, respectively, to reduce the required datasets for learning an effective RL policy. Numerical examples for aerodynamic shape optimization of a tall building are used to demonstrate that the proposed knowledge-enhanced deep RL-based shape optimizer outperforms both gradient-based and gradient-free optimization algorithms.<br/></div> © 2021 Computer-Aided Civil and Infrastructure Engineering},\nkey = {Domain Knowledge},\n%keywords = {Aerodynamics;Deep neural networks;Knowledge management;Structural optimization;Tall buildings;Learning systems;Structural design;Reinforcement learning;Shape optimization;},\n%note = {Aero-dynamic performance;Aerodynamic shape optimization;Computational costs;Gradient-free optimizations;Meta-learning techniques;Reinforcement learning method;Shape optimization algorithms;Structural shape optimizations;},\nURL = {http://dx.doi.org/10.1111/mice.12655},\n} \n\n\n
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Structural shape optimization plays an important role in the design of wind-sensitive structures. The numerical evaluation of aerodynamic performance for each shape search and update during the optimization process typically involves significant computational costs. Accordingly, an effective shape optimization algorithm is needed. In this study, the reinforcement learning (RL) method with deep neural network (DNN)-based policy is utilized for the first time as a shape optimization scheme for aerodynamic mitigation of wind-sensitive structures. In addition, \"tacit\" domain knowledge is leveraged to enhance the training efficiency. Both the specific direct-domain knowledge and general cross-domain knowledge are incorporated into the deep RL-based aerodynamic shape optimizer via the transfer-learning and meta-learning techniques, respectively, to reduce the required datasets for learning an effective RL policy. Numerical examples for aerodynamic shape optimization of a tall building are used to demonstrate that the proposed knowledge-enhanced deep RL-based shape optimizer outperforms both gradient-based and gradient-free optimization algorithms.
© 2021 Computer-Aided Civil and Infrastructure Engineering\n
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\n \n\n \n \n \n \n \n \n Quantifying the ductility-related force modification factor for 10-story timber-rc hybrid building using fema p695 procedure and considering the 2015 nbc seismic hazard.\n \n \n \n \n\n\n \n Tesfamariam, S.; Skandalos, K.; Goda, K.; Bezabeh, M. A.; Bitsuamlak, G.; and Popovski, M.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 147(5). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"QuantifyingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20211110081407 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Quantifying the ductility-related force modification factor for 10-story timber-rc hybrid building using fema p695 procedure and considering the 2015 nbc seismic hazard},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Tesfamariam, Solomon and Skandalos, Konstantinos and Goda, Katsuichiro and Bezabeh, Matiyas A. and Bitsuamlak, Girma and Popovski, Marjan},\nvolume = {147},\nnumber = {5},\nyear = {2021},\nissn = {07339445},\nabstract = {In this work, a 10-story uncoupled (10S-U) hybrid seismic force resisting system, consisting of cross-laminated timber (CLT) walls and reinforced concrete (RC) beams, is considered. Required design ductility factor Rd, in congruence with the National Building Code of Canada, was developed using FEMA P695 collapse risk procedure. Two trial Rd factors, Rd=2 and Rd=3, were first used to design the hybrid building for seismicity of Vancouver, BC, and 3D numerical models were developed in Open System for Earthquake Engineering Simulation (OpenSees) finite element framework. The energy dissipation of the structural system was enhanced using buckling restraining brace hold-downs and energy dissipator connection between the panels. The rocking response mechanism governed and, as a result, the cyclic pushover results show recentering capability. A suitable set of 30 ground motion records that reflect the seismic hazard of Vancouver, British Columbia, was selected in congruence with the 2015 National Building Code of Canada (NBC). Using incremental dynamic analysis, the collapse risk and collapse margin ratios were obtained to check the suitability of the two proposed Rd factors. The Rd=2 factor was shown to be acceptable for the 10S-U structural system.<br/> © 2021 American Society of Civil Engineers.},\nkey = {Energy dissipation},\n%keywords = {Risk assessment;Hybrid systems;Seismic design;Walls (structural partitions);Architectural design;Concrete beams and girders;Energy dissipators;Hazards;Ductility;Seismic response;Building codes;Timber;Reinforced concrete;},\n%note = {3-d numerical models;Force modification factors;Incremental dynamic analysis;National Building Code of Canada;Reinforced concrete beams;Rocking response;Structural systems;Vancouver , British Columbia;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0003007},\n} \n\n\n
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\n In this work, a 10-story uncoupled (10S-U) hybrid seismic force resisting system, consisting of cross-laminated timber (CLT) walls and reinforced concrete (RC) beams, is considered. Required design ductility factor Rd, in congruence with the National Building Code of Canada, was developed using FEMA P695 collapse risk procedure. Two trial Rd factors, Rd=2 and Rd=3, were first used to design the hybrid building for seismicity of Vancouver, BC, and 3D numerical models were developed in Open System for Earthquake Engineering Simulation (OpenSees) finite element framework. The energy dissipation of the structural system was enhanced using buckling restraining brace hold-downs and energy dissipator connection between the panels. The rocking response mechanism governed and, as a result, the cyclic pushover results show recentering capability. A suitable set of 30 ground motion records that reflect the seismic hazard of Vancouver, British Columbia, was selected in congruence with the 2015 National Building Code of Canada (NBC). Using incremental dynamic analysis, the collapse risk and collapse margin ratios were obtained to check the suitability of the two proposed Rd factors. The Rd=2 factor was shown to be acceptable for the 10S-U structural system.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Numerical investigation into I-shape brace connections of conventional concentrically braced frames.\n \n \n \n \n\n\n \n Wang, C.; Rudman, A.; Tremblay, R.; and Rogers, C. A.\n\n\n \n\n\n\n Engineering Structures, 236. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20211210106147 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical investigation into I-shape brace connections of conventional concentrically braced frames},\njournal = {Engineering Structures},\nauthor = {Wang, Chen and Rudman, Alina and Tremblay, Robert and Rogers, Colin A.},\nvolume = {236},\nyear = {2021},\nissn = {01410296},\nabstract = {In many low and moderate seismic regions, a low-ductility concentrically braced frame (CBF) is used as the seismic force resisting system for steel structures. The design of such CBFs is straightforward: all members and connections are designed based on the seismic force demand obtained through linear elastic structural analysis; capacity-based design and additional seismic detailing are not required. There is no designated energy-dissipating fuse in the lateral load-carrying path. Such CBFs are referred to as Conventional CBFs (CCBFs) in this study. In CCBFs, the brace-to-gusset connections are inherently weaker in tension than the adjoining gusset plates and braces. This occurs because both the gusset plates and the braces are selected on the basis of their respective compressive buckling resistances, and hence, typically have a much greater resistance in tension. Described herein is a numerical study of the popular flange plate bolted I-shape brace connection configuration. A high-fidelity finite element (FE) simulation procedure was developed and validated against laboratory test results. The resulting numerical models were created with the objective of improving our understanding of the inelastic response of these brace connections. The force transfer mechanism within the two branches of the connection was characterized. Significant nonuniform shear distribution was found to exist within the bolt group in the flange branch, which may be detrimental to the safe functioning of these bolts in the seismic design context. The loading eccentricity on the weld group was quantified. Recommendations on how to avoid brittle bolt shear rupture and premature weld fracture are proposed.<br/> © 2021 Elsevier Ltd},\nkey = {Ductility},\n%keywords = {Seismic design;Structural frames;Plates (structural components);Welds;Finite element method;Bolts;Flanges;Seismology;},\n%note = {Bolted brace connection;Concentrically braced frames;Finite elements simulation;Force-transfer mechanisms;Gusset plates;Low ductility;No capacity design;Numerical investigations;Seismic forces;Seismic regions;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.112091},\n} \n\n\n
\n
\n\n\n
\n In many low and moderate seismic regions, a low-ductility concentrically braced frame (CBF) is used as the seismic force resisting system for steel structures. The design of such CBFs is straightforward: all members and connections are designed based on the seismic force demand obtained through linear elastic structural analysis; capacity-based design and additional seismic detailing are not required. There is no designated energy-dissipating fuse in the lateral load-carrying path. Such CBFs are referred to as Conventional CBFs (CCBFs) in this study. In CCBFs, the brace-to-gusset connections are inherently weaker in tension than the adjoining gusset plates and braces. This occurs because both the gusset plates and the braces are selected on the basis of their respective compressive buckling resistances, and hence, typically have a much greater resistance in tension. Described herein is a numerical study of the popular flange plate bolted I-shape brace connection configuration. A high-fidelity finite element (FE) simulation procedure was developed and validated against laboratory test results. The resulting numerical models were created with the objective of improving our understanding of the inelastic response of these brace connections. The force transfer mechanism within the two branches of the connection was characterized. Significant nonuniform shear distribution was found to exist within the bolt group in the flange branch, which may be detrimental to the safe functioning of these bolts in the seismic design context. The loading eccentricity on the weld group was quantified. Recommendations on how to avoid brittle bolt shear rupture and premature weld fracture are proposed.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Stability evaluation of overtopped hydraulic structures using computational fluid dynamics.\n \n \n \n \n\n\n \n Freitas, M.; Favre, E.; Leger, P.; and Pedroso, L. J.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 48(3): 341 - 346. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"StabilityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20211110066402 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Stability evaluation of overtopped hydraulic structures using computational fluid dynamics},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Freitas, Mario and Favre, Etienne and Leger, Pierre and Pedroso, Lineu Jose},\nvolume = {48},\nnumber = {3},\nyear = {2021},\npages = {341 - 346},\nissn = {03151468},\nabstract = {A particularly challenging aspect in gravity dam stability assessment is the estimation of the induced hydrodynamic water pressure when water with significant velocity is overtopping gravity dams and flowing in or over spillway components. The water flow conditions, including the related pressure fields and resultant forces, are difficult to quantify accurately. Herein, existing dam safety guidelines to estimate the weight of the overflowing water nappe on gravity dams with rectangular crests are first reviewed. Then, a computational fluid dynamics (CFD) methodology is developed to improve the simplified estimation of hydrodynamic pressure fields acting on the rectangular crests of submerged gravity dams. The CFD pressures are used as input data for the classical structural stability analyses based on the gravity method to more adequately quantify the dam stability during overtopping. A back analysis is also performed on the stability of an existing gated spillway that was overtopped during the 1996 Saguenay flood in Québec. Key words: Computational fluid dynamics (CFD), overtopping, stability, gravity dam, gated spillways.<br/> © 2020, Canadian Science Publishing. All rights reserved.},\nkey = {Computational fluid dynamics},\n%keywords = {Gravitation;Gravity dams;Flow of water;Spillways;System stability;Hydrodynamics;},\n%note = {Dam stability;Gravity method;Hydrodynamic pressure;Pressure field;Resultant forces;Stability evaluation;Structural stability analysis;Water pressures;},\nURL = {http://dx.doi.org/10.1139/cjce-2019-0287},\n} \n\n\n
\n
\n\n\n
\n A particularly challenging aspect in gravity dam stability assessment is the estimation of the induced hydrodynamic water pressure when water with significant velocity is overtopping gravity dams and flowing in or over spillway components. The water flow conditions, including the related pressure fields and resultant forces, are difficult to quantify accurately. Herein, existing dam safety guidelines to estimate the weight of the overflowing water nappe on gravity dams with rectangular crests are first reviewed. Then, a computational fluid dynamics (CFD) methodology is developed to improve the simplified estimation of hydrodynamic pressure fields acting on the rectangular crests of submerged gravity dams. The CFD pressures are used as input data for the classical structural stability analyses based on the gravity method to more adequately quantify the dam stability during overtopping. A back analysis is also performed on the stability of an existing gated spillway that was overtopped during the 1996 Saguenay flood in Québec. Key words: Computational fluid dynamics (CFD), overtopping, stability, gravity dam, gated spillways.
© 2020, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Enhancement of bid decision-making in construction projects: A reliability analysis approach.\n \n \n \n \n\n\n \n Ghodoosi, F.; Bagchi, A.; Hosseini, M. R.; Vilutien, T.; and Zeynalian, M.\n\n\n \n\n\n\n Journal of Civil Engineering and Management, 27(3): 149 - 161. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EnhancementPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20211010025343 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Enhancement of bid decision-making in construction projects: A reliability analysis approach},\njournal = {Journal of Civil Engineering and Management},\nauthor = {Ghodoosi, Farzad and Bagchi, Ashutosh and Hosseini, M. Reza and Vilutien, Tatjana and Zeynalian, Mehran},\nvolume = {27},\nnumber = {3},\nyear = {2021},\npages = {149 - 161},\nissn = {13923730},\nabstract = {Various risks significantly influence pricing of bids and a wide range of factors impact bid pricing risks. Of these, client’s reputation and the record of projects owned by a client have vital contribution on the issue. Current practices however fail to capture the impacts of client-related factors. There is a need for developing a practical quantitative approach, which enables estimators to process bid risk allocation easily. Through reliability analysis, the developed method proposed in this study enables practitioners to make informed bid/no-bid decisions based on estimating the probabilities of schedule and cost overruns. Estimating the probability of project failure enables estimators to quantify the risk element of bid price. In addition, schedule and cost overrun cumulative probability distributions can be used to estimate the expected value of these variables. The practicability of this proposed method is tested by empirical data obtained from 40 university construction projects of one client, for estimating the bid price of a low-rise building. For researchers, findings provide illuminating insight into the potential of using reliability analysis as a valuable tool for bid decision-making practices. So too, the proposed method offers a blueprint for estimating and calculating time and contingency – and managing associated risks – in planning construction projects. The contribution of this study for the world of practice lies in providing a simple, rapid and cost-effective method for bid decision-making processes.<br/> © 2021 The Author(s). Published by Vilnius Gediminas Technical University.},\nkey = {Reliability analysis},\n%keywords = {Cost effectiveness;Cost estimating;Risk analysis;Risk assessment;Risk perception;Cost benefit analysis;Probability distributions;},\n%note = {Bid decision making;Construction projects;Cost-effective methods;Cumulative probability distribution;Current practices;Low-rise buildings;Project failures;Quantitative approach;},\nURL = {http://dx.doi.org/10.3846/jcem.2021.14344},\n} \n\n\n
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\n Various risks significantly influence pricing of bids and a wide range of factors impact bid pricing risks. Of these, client’s reputation and the record of projects owned by a client have vital contribution on the issue. Current practices however fail to capture the impacts of client-related factors. There is a need for developing a practical quantitative approach, which enables estimators to process bid risk allocation easily. Through reliability analysis, the developed method proposed in this study enables practitioners to make informed bid/no-bid decisions based on estimating the probabilities of schedule and cost overruns. Estimating the probability of project failure enables estimators to quantify the risk element of bid price. In addition, schedule and cost overrun cumulative probability distributions can be used to estimate the expected value of these variables. The practicability of this proposed method is tested by empirical data obtained from 40 university construction projects of one client, for estimating the bid price of a low-rise building. For researchers, findings provide illuminating insight into the potential of using reliability analysis as a valuable tool for bid decision-making practices. So too, the proposed method offers a blueprint for estimating and calculating time and contingency – and managing associated risks – in planning construction projects. The contribution of this study for the world of practice lies in providing a simple, rapid and cost-effective method for bid decision-making processes.
© 2021 The Author(s). Published by Vilnius Gediminas Technical University.\n
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\n \n\n \n \n \n \n \n \n A Poro-elastodynamic Forward Solver for Dispersion Analysis of Saturated Multilayer Systems.\n \n \n \n \n\n\n \n Liu, H.; Maghoul, P.; and Shalaby, A.\n\n\n \n\n\n\n In volume 126, pages 637 - 644, Turin, Italy, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20210909994113 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Poro-elastodynamic Forward Solver for Dispersion Analysis of Saturated Multilayer Systems},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Liu, Hongwei and Maghoul, Pooneh and Shalaby, Ahmed},\nvolume = {126},\nyear = {2021},\npages = {637 - 644},\nissn = {23662557},\naddress = {Turin, Italy},\nabstract = {Non-destructive testing (NDT) plays an important role in material inspection and characterization. In geotechnical engineering, the popular seismic NDT includes Spectral Analysis of Surface Wave (SASW), Multichannel Analysis of Surface Waves Method (MASW) and Continuous Surface Wave (CSW). A forward solver and a back-calculation algorithm are required to determine the soil stratigraphy and the properties of each soil layer. However, most of available forward solvers are limited to elastodynamic solutions in which the soil’s porous nature and water content and can’t be taken into consideration. In this paper, a poro-elastodynamic forward solver for seismic NDT is presented. The proposed solver provides an analytical solution for wave propagation in saturated soil media using the spectral element method. The P and S waves are decoupled through the Helmholtz decomposition. The P waves in solid skeleton and porewater are further decoupled through an Eigen decomposition technique. Such a solver can effectively determine the dispersion relation for a given structure, which can be further used for geophysical inversion application based on surface wave tests.<br/> © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.},\nkey = {Nondestructive examination},\n%keywords = {Seismic waves;Dispersion (waves);Geotechnical engineering;Shear waves;Soil testing;Spectrum analysis;Wave propagation;Seismology;Soils;Stratigraphy;Surface waves;},\n%note = {Continuous surface waves;Elastodynamic solutions;Geophysical inversion;Helmholtz decomposition;Multi-channel analysis of surface waves;Non destructive testing;Spectral analysis of surface waves;Spectral element method;},\nURL = {http://dx.doi.org/10.1007/978-3-030-64518-2_75},\n} \n\n\n
\n
\n\n\n
\n Non-destructive testing (NDT) plays an important role in material inspection and characterization. In geotechnical engineering, the popular seismic NDT includes Spectral Analysis of Surface Wave (SASW), Multichannel Analysis of Surface Waves Method (MASW) and Continuous Surface Wave (CSW). A forward solver and a back-calculation algorithm are required to determine the soil stratigraphy and the properties of each soil layer. However, most of available forward solvers are limited to elastodynamic solutions in which the soil’s porous nature and water content and can’t be taken into consideration. In this paper, a poro-elastodynamic forward solver for seismic NDT is presented. The proposed solver provides an analytical solution for wave propagation in saturated soil media using the spectral element method. The P and S waves are decoupled through the Helmholtz decomposition. The P waves in solid skeleton and porewater are further decoupled through an Eigen decomposition technique. Such a solver can effectively determine the dispersion relation for a given structure, which can be further used for geophysical inversion application based on surface wave tests.
© 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Fretting fatigue life assessment of overhead conductors using a clamp/conductor numerical model and biaxial fretting fatigue tests on individual wires.\n \n \n \n \n\n\n \n Omrani, A.; Langlois, S.; Van Dyke, P.; Lalonde, S.; Karganroudi, S. S.; and Dieng, L.\n\n\n \n\n\n\n Fatigue and Fracture of Engineering Materials and Structures, 44(6): 1498 - 1514. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"FrettingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20211010025739 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Fretting fatigue life assessment of overhead conductors using a clamp/conductor numerical model and biaxial fretting fatigue tests on individual wires},\njournal = {Fatigue and Fracture of Engineering Materials and Structures},\nauthor = {Omrani, Amine and Langlois, Sebastien and Van Dyke, Pierre and Lalonde, Sebastien and Karganroudi, Sasan Sattarpanah and Dieng, Lamine},\nvolume = {44},\nnumber = {6},\nyear = {2021},\npages = {1498 - 1514},\nissn = {8756758X},\nabstract = {<div data-language="eng" data-ev-field="abstract">The fatigue life of overhead conductors is usually evaluated through experimental tests on clamp/conductor assemblies. Some recent studies aim to estimate the fatigue life of conductors using uniaxial tests on individual strands. This paper presents an innovative method for assessing the fretting fatigue life of overhead conductors combining the effect of both tension and bending loadings. It consists of coupling a numerical approach based on modeling the clamp/conductor assembly using the finite element method and an experimental one based on fretting fatigue tests on individual wires. A biaxial fretting fatigue test rig has been developed and validated through preliminary tests performed on 1350-H19 aluminum wires under uniaxial and an equivalent biaxial loading. Tension and bending loadings obtained from the numerical model were then applied on individual wires. Results showed a good correspondence with existing experimental data of the fatigue tests carried on the aluminum conductor steel reinforced (ACSR) Bersfort conductor with a metal-to-metal suspension clamp.<br/></div> © 2021 John Wiley & Sons, Ltd.},\nkey = {Wire},\n%keywords = {Numerical models;Numerical methods;Fatigue testing;},\n%note = {Aluminum conductor steel reinforced;Biaxial loading;Experimental test;Fretting fatigue lives;Fretting fatigues;Innovative method;Numerical approaches;Overhead conductors;},\nURL = {http://dx.doi.org/10.1111/ffe.13444},\n} \n\n\n
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The fatigue life of overhead conductors is usually evaluated through experimental tests on clamp/conductor assemblies. Some recent studies aim to estimate the fatigue life of conductors using uniaxial tests on individual strands. This paper presents an innovative method for assessing the fretting fatigue life of overhead conductors combining the effect of both tension and bending loadings. It consists of coupling a numerical approach based on modeling the clamp/conductor assembly using the finite element method and an experimental one based on fretting fatigue tests on individual wires. A biaxial fretting fatigue test rig has been developed and validated through preliminary tests performed on 1350-H19 aluminum wires under uniaxial and an equivalent biaxial loading. Tension and bending loadings obtained from the numerical model were then applied on individual wires. Results showed a good correspondence with existing experimental data of the fatigue tests carried on the aluminum conductor steel reinforced (ACSR) Bersfort conductor with a metal-to-metal suspension clamp.
© 2021 John Wiley & Sons, Ltd.\n
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\n \n\n \n \n \n \n \n \n Physical property evolution of the anode mixture during the baking process.\n \n \n \n \n\n\n \n Chen, B.; Chaouki, H.; Picard, D.; Lauzon-Gauthier, J.; Alamdari, H.; and Fafard, M.\n\n\n \n\n\n\n Materials, 14(4): 1 - 34. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"PhysicalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210809973486 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Physical property evolution of the anode mixture during the baking process},\njournal = {Materials},\nauthor = {Chen, Bowen and Chaouki, Hicham and Picard, Donald and Lauzon-Gauthier, Julien and Alamdari, Houshang and Fafard, Mario},\nvolume = {14},\nnumber = {4},\nyear = {2021},\npages = {1 - 34},\nissn = {19961944},\nabstract = {The Hall-Héroult process uses prebaked carbon anodes as electrodes. The anode’s quality plays a crucial role in the efficiency of the aluminium production process. During the baking pro-cess, the anode undergoes complex physicochemical transformations. Thus, the production of high-quality anodes depends, among others, on the efficient control of their baking process. This paper aims to investigate the evolution of some physical properties of the anode paste mixture during the baking process. These properties include the mass loss fraction, real and apparent densities, the ratio of apparent volume, the permeability, and porosities. For this purpose, experiments consisting of thermogravimetric analysis, dilatometry, air permeability, and helium-pycnometric measurements were carried out. The anode permeability at high temperatures was linked to the air permeability through a permeability correlator due to experimental limitations. Moreover, the real density at high temperatures was estimated by combining real densities of the coal tar pitch and coke aggre-gates. Different porosities, such as the open porosity and the closed porosity related to the pitch binder, were estimated by taking the permeability at high temperatures into account. In this context, the effect of the permeability correlator, which was introduced to link the permeability at high temperatures to the air permeability, was investigated through a sensitivity analysis. These results al-low an estimation of the shrinking index, a new variable introduced to reflect the baking level of the anode mixture, which is linked to the volatile that is released in both open and closed pores. Afterwards, the pore pressure inside closed pores in the coal tar pitch was estimated. The obtained results highlight some new insights related to the baking process of the anode mixture. Moreover, they pave the way for better modeling of the thermo-chemo-mechanical behavior of anodes at high temperatures.<br/> © 2021 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Anodes},\n%keywords = {Mixtures;Molecular weight;Coal tar;Porosity;Pore pressure;Thermogravimetric analysis;Quality control;Pore structure;Sensitivity analysis;},\n%note = {Aluminium production;Apparent density;Apparent volume;Efficient control;High temperature;Mechanical behavior;Physicochemical transformation;Pycnometric measurements;},\nURL = {http://dx.doi.org/10.3390/ma14040923},\n} \n\n\n
\n
\n\n\n
\n The Hall-Héroult process uses prebaked carbon anodes as electrodes. The anode’s quality plays a crucial role in the efficiency of the aluminium production process. During the baking pro-cess, the anode undergoes complex physicochemical transformations. Thus, the production of high-quality anodes depends, among others, on the efficient control of their baking process. This paper aims to investigate the evolution of some physical properties of the anode paste mixture during the baking process. These properties include the mass loss fraction, real and apparent densities, the ratio of apparent volume, the permeability, and porosities. For this purpose, experiments consisting of thermogravimetric analysis, dilatometry, air permeability, and helium-pycnometric measurements were carried out. The anode permeability at high temperatures was linked to the air permeability through a permeability correlator due to experimental limitations. Moreover, the real density at high temperatures was estimated by combining real densities of the coal tar pitch and coke aggre-gates. Different porosities, such as the open porosity and the closed porosity related to the pitch binder, were estimated by taking the permeability at high temperatures into account. In this context, the effect of the permeability correlator, which was introduced to link the permeability at high temperatures to the air permeability, was investigated through a sensitivity analysis. These results al-low an estimation of the shrinking index, a new variable introduced to reflect the baking level of the anode mixture, which is linked to the volatile that is released in both open and closed pores. Afterwards, the pore pressure inside closed pores in the coal tar pitch was estimated. The obtained results highlight some new insights related to the baking process of the anode mixture. Moreover, they pave the way for better modeling of the thermo-chemo-mechanical behavior of anodes at high temperatures.
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Monitoring Environmental and Climatic Exposure Conditions for Structures in Cold Regions.\n \n \n \n \n\n\n \n Keserle, G. C.; Sanchez, T.; Conciatori, D.; and Chouinard, L.\n\n\n \n\n\n\n Journal of Cold Regions Engineering, 35(2). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"MonitoringPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210809956137 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Monitoring Environmental and Climatic Exposure Conditions for Structures in Cold Regions},\njournal = {Journal of Cold Regions Engineering},\nauthor = {Keserle, Gilberto Cidreira and Sanchez, Thomas and Conciatori, David and Chouinard, Luc},\nvolume = {35},\nnumber = {2},\nyear = {2021},\nissn = {0887381X},\nabstract = {The durability of structures is greatly affected by their level of exposure to environmental and climatic conditions. In the case of northern structures, a major factor of deterioration is the corrosion of reinforcing steel due to the ingress of chloride ions from deicing salts during the winter season. The rate of penetration of chloride ions is a function of the properties of the concrete and exposure conditions, which can be direct (e.g., ponding on a slab), by splashing (e.g., on parapets), and by mist. Several models have been proposed to model the ingress of chloride ions for each mode of exposure; however, many assumptions are required for boundary conditions at the surface of concrete elements given the current state of knowledge. The objective of this research is to address these issues through the development of a custom meteorological station and measuring devices that can be deployed near existing structures. In this article, the station and its measuring devices are described, and typical data collected for one winter season are described.<br/> © 2021 American Society of Civil Engineers.},\nkey = {Deterioration},\n%keywords = {Chlorine compounds;Ions;Steel corrosion;Concretes;},\n%note = {Climatic conditions;Concrete elements;Durability of structures;Existing structure;Exposure conditions;Measuring device;Meteorological station;Rate of penetration;},\nURL = {http://dx.doi.org/10.1061/(ASCE)CR.1943-5495.0000249},\n} \n\n\n
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\n The durability of structures is greatly affected by their level of exposure to environmental and climatic conditions. In the case of northern structures, a major factor of deterioration is the corrosion of reinforcing steel due to the ingress of chloride ions from deicing salts during the winter season. The rate of penetration of chloride ions is a function of the properties of the concrete and exposure conditions, which can be direct (e.g., ponding on a slab), by splashing (e.g., on parapets), and by mist. Several models have been proposed to model the ingress of chloride ions for each mode of exposure; however, many assumptions are required for boundary conditions at the surface of concrete elements given the current state of knowledge. The objective of this research is to address these issues through the development of a custom meteorological station and measuring devices that can be deployed near existing structures. In this article, the station and its measuring devices are described, and typical data collected for one winter season are described.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n The effect of air-entraining admixture and superabsorbent polymer on bond behaviour of steel rebar in pre-cracked and self-healed concrete.\n \n \n \n \n\n\n \n Mousavi, S. S.; Guizani, L.; Bhojaraju, C.; and Ouellet-Plamondon, C.\n\n\n \n\n\n\n Construction and Building Materials, 281. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20210809971010 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {The effect of air-entraining admixture and superabsorbent polymer on bond behaviour of steel rebar in pre-cracked and self-healed concrete},\njournal = {Construction and Building Materials},\nauthor = {Mousavi, Seyed Sina and Guizani, Lotfi and Bhojaraju, Chandrasekhar and Ouellet-Plamondon, Claudiane},\nvolume = {281},\nyear = {2021},\nissn = {09500618},\nabstract = {This paper intends to study the effect of air-entraining admixture (AE) on self-healing method at rebar-concrete interface using superabsorbent polymer (SAP). AE with a constant dosage of 0.83 kg/m<sup>3</sup>, and 0.25% and 1.0% SAP dosages are considered. Two types of superabsorbent polymer with different chemical compositions and particle sizes are considered for the experimental tests. Pull-out test results of mixtures containing AE admixture are compared with those in non-AE concrete. Scanning electron microscopy/energy dispersive X‐ray spectrometry (SEM/EDS) along with microscopic analysis is performed to study the healing products at crack surface and SAP macro voids around the rebar. Overall, results indicate that AE admixture has a considerable impact on the performance of the self-healing method at the rebar-concrete interface especially for higher dosage of SAP (1.0%). This can be attributed to the internal voids networks around the rebar generated by AE admixture, which can ease the water transfer between SAP macro voids to participate in healing cracks after wet-dry cycles. SEM analysis shows that stalactites, healing products at the external surface of crack, are composed of a large amount of calcium and oxygen.<br/> © 2021 Elsevier Ltd},\nkey = {Concrete mixtures},\n%keywords = {Scanning electron microscopy;Self-healing materials;Particle size analysis;},\n%note = {Air entraining admixtures;Chemical compositions;Experimental test;External surfaces;Microscopic analysis;Rebar concretes;Superabsorbent polymer;Water transfers;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2021.122568},\n} \n\n\n
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\n This paper intends to study the effect of air-entraining admixture (AE) on self-healing method at rebar-concrete interface using superabsorbent polymer (SAP). AE with a constant dosage of 0.83 kg/m3, and 0.25% and 1.0% SAP dosages are considered. Two types of superabsorbent polymer with different chemical compositions and particle sizes are considered for the experimental tests. Pull-out test results of mixtures containing AE admixture are compared with those in non-AE concrete. Scanning electron microscopy/energy dispersive X‐ray spectrometry (SEM/EDS) along with microscopic analysis is performed to study the healing products at crack surface and SAP macro voids around the rebar. Overall, results indicate that AE admixture has a considerable impact on the performance of the self-healing method at the rebar-concrete interface especially for higher dosage of SAP (1.0%). This can be attributed to the internal voids networks around the rebar generated by AE admixture, which can ease the water transfer between SAP macro voids to participate in healing cracks after wet-dry cycles. SEM analysis shows that stalactites, healing products at the external surface of crack, are composed of a large amount of calcium and oxygen.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Experimental, analytical, and finite element assessment of the shear strength of concrete-rock interfaces at different scales.\n \n \n \n \n\n\n \n Renaud, S.; Bouaanani, N.; and Miquel, B.\n\n\n \n\n\n\n International Journal for Numerical and Analytical Methods in Geomechanics, 45(9): 1238 - 1259. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"Experimental,Paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210809957393 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental, analytical, and finite element assessment of the shear strength of concrete-rock interfaces at different scales},\njournal = {International Journal for Numerical and Analytical Methods in Geomechanics},\nauthor = {Renaud, Sylvain and Bouaanani, Najib and Miquel, Benjamin},\nvolume = {45},\nnumber = {9},\nyear = {2021},\npages = {1238 - 1259},\nissn = {03639061},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents an original analytical approach to assess the shear strength of concrete-rock interfaces while accounting for the effects of scale, roughness and matching conditions. The technique proposed is based on experimental data obtained from small core samples extracted from existing dam sites, with diameters varying from 83 to 145 mm, and larger rectangular samples with side lengths comprised between 320 and 492 mm. The predictions of the analytical formulation are validated against results of direct shear tests, as well as 3D nonlinear finite element simulations. Sensitivity analyses are conducted to evaluate the influence of roughness and matching conditions on the shear behavior of concrete-rock contacts at different scales. The main results show that: (i) roughness inhomogeneity is one of the main causes of scale effects on the shear strength of concrete-rock interfaces; (ii) contact geometries proportional in both length and height are expected to present quite similar shear strengths; and (iii) geometry matching conditions must be accounted for as they might be the source of scale effects affecting the evaluation of the shear strength at concrete-rock interfaces. New equations are also proposed to suggest values of apparent cohesion and friction angle for concrete-rock contacts.<br/></div> © 2021 John Wiley & Sons Ltd.},\nkey = {Finite element method},\n%keywords = {Shear flow;Rocks;Concretes;Sensitivity analysis;},\n%note = {3D nonlinear finite elements;Analytical approach;Analytical formulation;Direct shear test;Geometry matching;Matching condition;Rectangular samples;Strength of concrete;},\nURL = {http://dx.doi.org/10.1002/nag.3195},\n} \n\n\n
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This paper presents an original analytical approach to assess the shear strength of concrete-rock interfaces while accounting for the effects of scale, roughness and matching conditions. The technique proposed is based on experimental data obtained from small core samples extracted from existing dam sites, with diameters varying from 83 to 145 mm, and larger rectangular samples with side lengths comprised between 320 and 492 mm. The predictions of the analytical formulation are validated against results of direct shear tests, as well as 3D nonlinear finite element simulations. Sensitivity analyses are conducted to evaluate the influence of roughness and matching conditions on the shear behavior of concrete-rock contacts at different scales. The main results show that: (i) roughness inhomogeneity is one of the main causes of scale effects on the shear strength of concrete-rock interfaces; (ii) contact geometries proportional in both length and height are expected to present quite similar shear strengths; and (iii) geometry matching conditions must be accounted for as they might be the source of scale effects affecting the evaluation of the shear strength at concrete-rock interfaces. New equations are also proposed to suggest values of apparent cohesion and friction angle for concrete-rock contacts.
© 2021 John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Evaluation of the slotted-hidden-gap (SHG) connection for square HSS brace members.\n \n \n \n \n\n\n \n Afifi, M.; Moreau, R.; Tremblay, R.; and Rogers, C. A.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 179. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EvaluationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210609892132 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evaluation of the slotted-hidden-gap (SHG) connection for square HSS brace members},\njournal = {Journal of Constructional Steel Research},\nauthor = {Afifi, Mohamed and Moreau, Rolando and Tremblay, Robert and Rogers, Colin A.},\nvolume = {179},\nyear = {2021},\nissn = {0143974X},\nabstract = {Hollow structural section (HSS) braces of concentrically braced steel frame structures are often connected using a knife connection, which creates a net area in the brace due to the slot. Tensile rupture of the brace's net section is the controlling failure mode unless reinforcing schemes are utilized. The "Slotted-Hidden-Gap (SHG)" connection, in which a notch is created in the gusset plate to overlap the gross area of the tube to eliminate the net area, represents an attractive alternative to traditional connection reinforcements; however, no design guidelines exist for the SHG connection for square HSS braces. A laboratory testing program and finite element modelling were carried out to determine the minimum overlap length required to develop the yield resistance of a square HSS brace. The test program included monotonic tensile loading tests on short conventional- and SHG- connection specimens, and one reversed cyclic loading test on a 4.86 m long brace specimen with SHG connections. An overlap length of 5% of the weld length was sufficient to develop the yield resistance of the braces with SHG connections. For those specimens, the HSS eventually fractured on their gross area away from the connections, after experiencing extensive yielding along their length. Conversely, braces with the conventional connections suffered localised yielding and fracture at the net section. The long brace with SHG connections attained its yield tensile resistance, including a 15% increase due to strain hardening, while sustaining an axial deformation corresponding to a storey drift of 3.14%.<br/> © 2021},\nkey = {Seismic design},\n%keywords = {Steel testing;Strain hardening;Cyclic loads;Software testing;Tensile testing;Structural frames;Welding;},\n%note = {Braced steel frames;Conventional connections;Finite element modelling;Hollow structural sections;Laboratory testing;Reversed cyclic loading;Tensile resistance;Tensile-loading tests;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2021.106548},\n} \n\n\n
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\n Hollow structural section (HSS) braces of concentrically braced steel frame structures are often connected using a knife connection, which creates a net area in the brace due to the slot. Tensile rupture of the brace's net section is the controlling failure mode unless reinforcing schemes are utilized. The \"Slotted-Hidden-Gap (SHG)\" connection, in which a notch is created in the gusset plate to overlap the gross area of the tube to eliminate the net area, represents an attractive alternative to traditional connection reinforcements; however, no design guidelines exist for the SHG connection for square HSS braces. A laboratory testing program and finite element modelling were carried out to determine the minimum overlap length required to develop the yield resistance of a square HSS brace. The test program included monotonic tensile loading tests on short conventional- and SHG- connection specimens, and one reversed cyclic loading test on a 4.86 m long brace specimen with SHG connections. An overlap length of 5% of the weld length was sufficient to develop the yield resistance of the braces with SHG connections. For those specimens, the HSS eventually fractured on their gross area away from the connections, after experiencing extensive yielding along their length. Conversely, braces with the conventional connections suffered localised yielding and fracture at the net section. The long brace with SHG connections attained its yield tensile resistance, including a 15% increase due to strain hardening, while sustaining an axial deformation corresponding to a storey drift of 3.14%.
© 2021\n
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\n \n\n \n \n \n \n \n \n Influence of Alkali-Silica reaction (ASR) on aggregate interlock and shear-friction behavior of reinforced concrete members.\n \n \n \n \n\n\n \n Fiset, M.; Sanchez, L.; Bilodeau, S.; Mitchell, D.; and Bastien, J.\n\n\n \n\n\n\n Engineering Structures, 233. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"InfluencePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210709911297 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Influence of Alkali-Silica reaction (ASR) on aggregate interlock and shear-friction behavior of reinforced concrete members},\njournal = {Engineering Structures},\nauthor = {Fiset, M. and Sanchez, L.F.M. and Bilodeau, S. and Mitchell, D. and Bastien, J.},\nvolume = {233},\nyear = {2021},\nissn = {01410296},\nabstract = {Alkali-silica reaction (ASR) is one of the most damaging mechanisms affecting concrete structures worldwide. ASR effects on the durability and serviceability of damaged concrete are widely known and fairly well understood. However, the structural implications are still unclear, and a number of contradictory data are found in the literature, especially regarding shear behavior. The influence of ASR distressed reinforced concrete on aggregate interlock is presented in this paper. Push-off specimens having different transverse reinforcement ratios were fabricated with ASR reactive coarse aggregates. The specimens were monitored over time and displayed different levels of expansion. Results indicated that ASR-induced expansion and damage were affected by the transverse reinforcement ratio. However, little to no aggregate interlock reduction was observed on ASR-affected specimens up to moderate expansion levels (about 0.12%). It was found that there were two controlling and competing mechanisms that affected aggregate interlock for ASR-affected specimens: the beneficial effects of chemical prestressing and the detrimental ASR-induced damage.<br/> © 2021 Elsevier Ltd},\nkey = {Expansion},\n%keywords = {Concrete aggregates;Reinforced concrete;Silica;},\n%note = {Aggregate interlocks;Alkali-silica reaction;Beneficial effects;Coarse aggregates;Competing mechanisms;Damaging mechanism;Reinforced concrete member;Transverse reinforcement ratio;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.111890},\n} \n\n\n
\n
\n\n\n
\n Alkali-silica reaction (ASR) is one of the most damaging mechanisms affecting concrete structures worldwide. ASR effects on the durability and serviceability of damaged concrete are widely known and fairly well understood. However, the structural implications are still unclear, and a number of contradictory data are found in the literature, especially regarding shear behavior. The influence of ASR distressed reinforced concrete on aggregate interlock is presented in this paper. Push-off specimens having different transverse reinforcement ratios were fabricated with ASR reactive coarse aggregates. The specimens were monitored over time and displayed different levels of expansion. Results indicated that ASR-induced expansion and damage were affected by the transverse reinforcement ratio. However, little to no aggregate interlock reduction was observed on ASR-affected specimens up to moderate expansion levels (about 0.12%). It was found that there were two controlling and competing mechanisms that affected aggregate interlock for ASR-affected specimens: the beneficial effects of chemical prestressing and the detrimental ASR-induced damage.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Using the Soil and Water Assessment Tool to develop a LiDAR-based index of the erosion regulation ecosystem service.\n \n \n \n \n\n\n \n Frizzle, C.; Fournier, R. A.; Trudel, M.; and Luther, J. E.\n\n\n \n\n\n\n Journal of Hydrology, 595. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"UsingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20210609903397 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Using the Soil and Water Assessment Tool to develop a LiDAR-based index of the erosion regulation ecosystem service},\njournal = {Journal of Hydrology},\nauthor = {Frizzle, Catherine and Fournier, Richard A. and Trudel, Melanie and Luther, Joan E.},\nvolume = {595},\nyear = {2021},\nissn = {00221694},\nabstract = {Maps of ecosystem services are becoming increasingly useful for reporting on the potential impacts of human activity on the environment. However, interactions in watersheds are complex, and mapping hydrological ecosystem services (HES) requires indicators which accurately measure underlying processes. The main objective of this study was to take advantage of the Soil and Water Assessment Tool (SWAT) and Light detection and ranging (LiDAR) data to map the erosion regulation service for a managed boreal forest watershed. To do so, SWAT and partial least-squares (PLS) regression were used to select explanatory variables for sediment yield. Variables of importance in projection (VIP) with a score > 1 were selected to develop LiDAR-based ecological indicators. Four categories of variables were identified as VIP from the PLS: (i) climate: annual precipitation, (ii) land use: forest, cutovers; (iii) land use patterns: cutover patch cohesion index, and (iv) morphometric: main channel length, channel length and sub-watershed area. The height of the 95th percentile of LiDAR returns (p95) < 5 m provided the most accurate spatial representation of cutovers and the optimal cutover patch cohesion index. Other morphometrics were obtained from a LiDAR-based digital terrain model. Explanatory variables for sediment yield were combined in a sediment erosion control (SEC) index, except for yearly average precipitation because the SEC index is not actually used as a temporal index. As expected, a negative relationship was found between sediment yield and SEC index rankings for the 2006-2015 period (Spearman, rho = -0.6, p < 0.05). Moreover, the overall agreement between SWAT and SEC index classes was 87% for 31 sub-watersheds. The study provides a list of relevant explanatory variables for modelling sediment yield in a boreal forest watershed where timber harvest activities occur. It also demonstrates the use of LiDAR data for deriving an index of the erosion regulation ecosystem service in a proxy-based approach as it had not been demonstrated previously at the watershed level. The validation method applied here fills a gap in ecosystem services mapping that could benefit studies in other watershed contexts.<br/> © 2021},\nkey = {SWAT},\n%keywords = {Optical radar;Erosion;Mapping;Forestry;Sediments;Ecosystems;Watersheds;Land use;Least squares approximations;},\n%note = {Boreal forest watershed;Digital terrain model;Explanatory variables;Light detection and ranging;Partial least-squares regression;Soil and water assessment tool;Soil and Water assessment tools;Spatial representations;},\nURL = {http://dx.doi.org/10.1016/j.jhydrol.2021.126009},\n} \n\n\n
\n
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\n Maps of ecosystem services are becoming increasingly useful for reporting on the potential impacts of human activity on the environment. However, interactions in watersheds are complex, and mapping hydrological ecosystem services (HES) requires indicators which accurately measure underlying processes. The main objective of this study was to take advantage of the Soil and Water Assessment Tool (SWAT) and Light detection and ranging (LiDAR) data to map the erosion regulation service for a managed boreal forest watershed. To do so, SWAT and partial least-squares (PLS) regression were used to select explanatory variables for sediment yield. Variables of importance in projection (VIP) with a score > 1 were selected to develop LiDAR-based ecological indicators. Four categories of variables were identified as VIP from the PLS: (i) climate: annual precipitation, (ii) land use: forest, cutovers; (iii) land use patterns: cutover patch cohesion index, and (iv) morphometric: main channel length, channel length and sub-watershed area. The height of the 95th percentile of LiDAR returns (p95) < 5 m provided the most accurate spatial representation of cutovers and the optimal cutover patch cohesion index. Other morphometrics were obtained from a LiDAR-based digital terrain model. Explanatory variables for sediment yield were combined in a sediment erosion control (SEC) index, except for yearly average precipitation because the SEC index is not actually used as a temporal index. As expected, a negative relationship was found between sediment yield and SEC index rankings for the 2006-2015 period (Spearman, rho = -0.6, p < 0.05). Moreover, the overall agreement between SWAT and SEC index classes was 87% for 31 sub-watersheds. The study provides a list of relevant explanatory variables for modelling sediment yield in a boreal forest watershed where timber harvest activities occur. It also demonstrates the use of LiDAR data for deriving an index of the erosion regulation ecosystem service in a proxy-based approach as it had not been demonstrated previously at the watershed level. The validation method applied here fills a gap in ecosystem services mapping that could benefit studies in other watershed contexts.
© 2021\n
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\n \n\n \n \n \n \n \n \n Compaction of cohesive granular material: Application to carbon paste.\n \n \n \n \n\n\n \n Kansoun, Z.; Chaouki, H.; Picard, D.; Lauzon-Gauthier, J.; Alamdari, H.; and Fafard, M.\n\n\n \n\n\n\n Materials, 14(4): 1 - 17. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"CompactionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210609899671 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Compaction of cohesive granular material: Application to carbon paste},\njournal = {Materials},\nauthor = {Kansoun, Zahraa and Chaouki, Hicham and Picard, Donald and Lauzon-Gauthier, Julien and Alamdari, Houshang and Fafard, Mario},\nvolume = {14},\nnumber = {4},\nyear = {2021},\npages = {1 - 17},\nissn = {19961944},\nabstract = {Carbon-like materials such as the anode and the ramming paste play a crucial role in the efficiency of the Hall–Héroult process. The mechanical behavior of these materials during forming processes is complex and still ill-understood. This work aimed to investigate experimentally the mechanical behavior of a carbon paste used in the aluminum industry under different loading conditions. For this purpose, experiments consisting of (1) relaxation tests at different compaction levels, (2) quasi-static cyclic tests at several amplitudes, (3) monotonic compaction tests at varied strain rates, and (4) vibrocompaction tests at different frequencies were carried out. The obtained results highlight some fundamental aspects of the carbon paste behavior such as the strain rate’s effect on the paste compressibility, the hardening-softening behavior under cyclic loadings, the effect of cycling amplitude on the stress state and the paste densification, and the frequency effect on the vibrocompaction process. These results pave the way for the development of reliable rheological models for the modeling and the numerical simulation of carbon pastes forming processes.<br/> © 2021 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Compaction},\n%keywords = {Cyclic loads;Strain rate;Carbon;},\n%note = {Aluminum industry;Different frequency;Frequency effect;Loading condition;Mechanical behavior;Rheological models;Softening behavior;Varied strain rates;},\nURL = {http://dx.doi.org/10.3390/ma14040704},\n} \n\n\n
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\n Carbon-like materials such as the anode and the ramming paste play a crucial role in the efficiency of the Hall–Héroult process. The mechanical behavior of these materials during forming processes is complex and still ill-understood. This work aimed to investigate experimentally the mechanical behavior of a carbon paste used in the aluminum industry under different loading conditions. For this purpose, experiments consisting of (1) relaxation tests at different compaction levels, (2) quasi-static cyclic tests at several amplitudes, (3) monotonic compaction tests at varied strain rates, and (4) vibrocompaction tests at different frequencies were carried out. The obtained results highlight some fundamental aspects of the carbon paste behavior such as the strain rate’s effect on the paste compressibility, the hardening-softening behavior under cyclic loadings, the effect of cycling amplitude on the stress state and the paste densification, and the frequency effect on the vibrocompaction process. These results pave the way for the development of reliable rheological models for the modeling and the numerical simulation of carbon pastes forming processes.
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Ensuring the Structural Safety of Overhead Transmission Lines by Design.\n \n \n \n \n\n\n \n Li, J.; McClure, G.; and Wang, S.\n\n\n \n\n\n\n Journal of Aerospace Engineering, 34(3). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EnsuringPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20210609898537 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Ensuring the Structural Safety of Overhead Transmission Lines by Design},\njournal = {Journal of Aerospace Engineering},\nauthor = {Li, Jia-Xiang and McClure, Ghyslaine and Wang, Shu-Hong},\nvolume = {34},\nnumber = {3},\nyear = {2021},\nissn = {08931321},\nabstract = {During service, transmission lines (TLs) will be subjected to unbalanced longitudinal loads due to events such as conductor breakage, insulator failure, and sudden ice shedding, which may damage TLs and subsequently hinder reliable power supply. Although unbalanced longitudinal loads are considered in current design codes, damage to TLs still occasionally occurs. This paper reviews the literature from the last 20 years pertaining to the response of TLs induced by the abovementioned events and associated tower failures. It comprises four main sections in relation to the sources of large unbalanced accidental loads: conductor breakage, sudden ice shedding, insulator breakage, and tower failure. Structural analysis methods to investigate these accidents are reviewed, and the latest research progress on modeling tower failure is discussed. Chinese code, American code and International Electrotechnical Commission code are compared to analyze the differences in accounting for longitudinal loads in these codes. In the end, several recommendations are provided for future design and research to ensure the structural safety of TLs.<br/> © 2021 American Society of Civil Engineers.},\nkey = {Electric lines},\n%keywords = {Ice;Seebeck effect;Failure (mechanical);Safety engineering;Surveying instruments;Towers;},\n%note = {Accidental loads;Chinese codes;Future designs;International Electrotechnical Commission;Overhead transmission lines;Reliable power supply;Structural safety;Transmission lines (TLs);},\nURL = {http://dx.doi.org/10.1061/(ASCE)AS.1943-5525.0001245},\n} \n\n\n
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\n During service, transmission lines (TLs) will be subjected to unbalanced longitudinal loads due to events such as conductor breakage, insulator failure, and sudden ice shedding, which may damage TLs and subsequently hinder reliable power supply. Although unbalanced longitudinal loads are considered in current design codes, damage to TLs still occasionally occurs. This paper reviews the literature from the last 20 years pertaining to the response of TLs induced by the abovementioned events and associated tower failures. It comprises four main sections in relation to the sources of large unbalanced accidental loads: conductor breakage, sudden ice shedding, insulator breakage, and tower failure. Structural analysis methods to investigate these accidents are reviewed, and the latest research progress on modeling tower failure is discussed. Chinese code, American code and International Electrotechnical Commission code are compared to analyze the differences in accounting for longitudinal loads in these codes. In the end, several recommendations are provided for future design and research to ensure the structural safety of TLs.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Consolidation characteristics of hydraulically deposited tailings obtained from shear wave velocity (Vs) measurements in triaxial and oedometric cells with piezoelectric ring-actuator technique (p-rat).\n \n \n \n \n\n\n \n Grimard, L.; Karray, M.; James, M.; and Aubertin, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 58(2): 281 - 294. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ConsolidationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210609875186 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Consolidation characteristics of hydraulically deposited tailings obtained from shear wave velocity (Vs) measurements in triaxial and oedometric cells with piezoelectric ring-actuator technique (p-rat)},\njournal = {Canadian Geotechnical Journal},\nauthor = {Grimard, Louis-Philippe and Karray, Mourad and James, Michael and Aubertin, Michel},\nvolume = {58},\nnumber = {2},\nyear = {2021},\npages = {281 - 294},\nissn = {00083674},\nabstract = {This paper presents the main results of a laboratory study of the use of shear wave velocity, V<inf>s</inf>, to characterize hydraulically deposited tailings on the basis of density (void ratio), mean effective stress, and overconsolidation ratio. Tailings specimens from a gold mine in western Quebec were prepared in triaxial and oedometric cells in a manner that simulates hydraulic deposition. The specimens were consolidated isotropically and anisotropically (stress ratio, K of 0.38). V<inf>s</inf> measurements were performed at each load increment using the piezoelectric ring-actuator technique (P-RAT). Correlations relating shear wave velocity to the void ratio, confining stress, and overconsolidation ratio of the tailings are presented. These laboratory correlations can be used for the characterization of the tailings by in situ V<inf>s</inf> measurement. The application of these correlations to seismic cone penetration testing in an actual tailings impoundment is also presented.<br/> © 2021, Canadian Science Publishing. All rights reserved.},\nkey = {Shear flow},\n%keywords = {Acoustic wave velocity;Shear waves;Rats;Piezoelectricity;Wave propagation;Soil mechanics;Piezoelectric actuators;},\n%note = {Cone penetration testing;Confining stress;Effective stress;Laboratory studies;Oedometric cells;Over consolidation ratio;Piezoelectric rings;Shear wave velocity;},\nURL = {http://dx.doi.org/10.1139/cgj-2019-0518},\n} \n\n\n
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\n This paper presents the main results of a laboratory study of the use of shear wave velocity, Vs, to characterize hydraulically deposited tailings on the basis of density (void ratio), mean effective stress, and overconsolidation ratio. Tailings specimens from a gold mine in western Quebec were prepared in triaxial and oedometric cells in a manner that simulates hydraulic deposition. The specimens were consolidated isotropically and anisotropically (stress ratio, K of 0.38). Vs measurements were performed at each load increment using the piezoelectric ring-actuator technique (P-RAT). Correlations relating shear wave velocity to the void ratio, confining stress, and overconsolidation ratio of the tailings are presented. These laboratory correlations can be used for the characterization of the tailings by in situ Vs measurement. The application of these correlations to seismic cone penetration testing in an actual tailings impoundment is also presented.
© 2021, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Seismic loss estimation software: A comprehensive review of risk assessment steps, software development and limitations.\n \n \n \n \n\n\n \n Hosseinpour, V.; Saeidi, A.; Nollet, M.; and Nastev, M.\n\n\n \n\n\n\n Engineering Structures, 232. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20210509857790 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic loss estimation software: A comprehensive review of risk assessment steps, software development and limitations},\njournal = {Engineering Structures},\nauthor = {Hosseinpour, Vahid and Saeidi, Ali and Nollet, Marie-Jose and Nastev, Miroslav},\nvolume = {232},\nyear = {2021},\nissn = {01410296},\nabstract = {Over recent years, seismic losses are increasing dramatically in terms of magnitude and frequency, thereby causing severe impacts on societies and economies. The increment in seismic losses is mainly due to the rapid growth of exposure and population in earthquake-prone areas worldwide. This phenomenon necessitates better understanding and accurate prediction of potential seismic risks to plan appropriate emergency response, rescue and recovery activities. The focus of the research community has shifted towards the prediction of the seismic risk, which paved way to the development of a number of modelling software. This paper presents a critical review of existing methods for seismic risk analysis and software developed by various organisations with an emphasis on their strength and limitations. First, the focus is on the essential assessment steps in seismic risk analysis, namely, hazard, exposure model and vulnerability assessment. Particular attention is paid to different approaches applied for vulnerability evaluation. The main advantages and disadvantages of each software are highlighted. Finally, a comparative analysis of major seismic risk software, such as HAZUS, Ergo, SELENA, OpenQuake and ER2, is provided. Findings of this review indicate unresolved issues in scenario loss modelling and probabilistic seismic risk assessment, such as the convergence problem in probabilistic seismic hazard analysis, selection of suitable ground motion prediction equation and consideration of epistemic uncertainty, which need to be further investigated and applied to future seismic risk assessments.<br/> © 2021 Elsevier Ltd},\nkey = {Risk analysis},\n%keywords = {Population statistics;Uncertainty analysis;Risk perception;Earthquakes;Forecasting;Seismic design;Risk assessment;Seismic response;Equations of motion;Software design;Motion estimation;Hazards;},\n%note = {Epistemic uncertainties;Ground-motion prediction equations;Probabilistic seismic hazard analysis;Probabilistic seismic risk assessments;Seismic loss estimation;Seismic risk assessment;Vulnerability assessments;Vulnerability evaluations;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2021.111866},\n} \n\n\n
\n
\n\n\n
\n Over recent years, seismic losses are increasing dramatically in terms of magnitude and frequency, thereby causing severe impacts on societies and economies. The increment in seismic losses is mainly due to the rapid growth of exposure and population in earthquake-prone areas worldwide. This phenomenon necessitates better understanding and accurate prediction of potential seismic risks to plan appropriate emergency response, rescue and recovery activities. The focus of the research community has shifted towards the prediction of the seismic risk, which paved way to the development of a number of modelling software. This paper presents a critical review of existing methods for seismic risk analysis and software developed by various organisations with an emphasis on their strength and limitations. First, the focus is on the essential assessment steps in seismic risk analysis, namely, hazard, exposure model and vulnerability assessment. Particular attention is paid to different approaches applied for vulnerability evaluation. The main advantages and disadvantages of each software are highlighted. Finally, a comparative analysis of major seismic risk software, such as HAZUS, Ergo, SELENA, OpenQuake and ER2, is provided. Findings of this review indicate unresolved issues in scenario loss modelling and probabilistic seismic risk assessment, such as the convergence problem in probabilistic seismic hazard analysis, selection of suitable ground motion prediction equation and consideration of epistemic uncertainty, which need to be further investigated and applied to future seismic risk assessments.
© 2021 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Influence of abutment straight backwall fracture on the seismic response of bridges.\n \n \n \n \n\n\n \n Zheng, Q.; Yang, C. W.; Xie, Y.; Padgett, J.; DesRoches, R.; and Roblee, C.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 50(7): 1824 - 1844. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"InfluencePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210509849597 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Influence of abutment straight backwall fracture on the seismic response of bridges},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Zheng, Qiu and Yang, Chuang-Sheng Walter and Xie, Yazhou and Padgett, Jamie and DesRoches, Reginald and Roblee, Cliff},\nvolume = {50},\nnumber = {7},\nyear = {2021},\npages = {1824 - 1844},\nissn = {00988847},\nabstract = {<div data-language="eng" data-ev-field="abstract">Field reconnaissance reports reveal the seismic vulnerability of bridge abutment foundations. To reduce the time and cost of postearthquake repair, modern seismic design specifications allow abutment backwalls to fracture before the supporting abutment foundations reach their maximum strength. This design strategy enables abutment backwalls to function as a fuse, thus protecting the abutment foundations from experiencing excessive forces and damage. This paper introduces a new abutment modeling scheme to capture the shear fracture mechanism of straight backwalls in seat abutments. To this end, a backwall connection spring is developed and incorporated into a spring system that simulates the behavior of various abutment components. The importance of considering the backwall fracture is examined by reviewing conventional modeling methodologies for abutments and building companion numerical models. Static pushover and incremental dynamic analyses (IDAs) were conducted for two bridges (single- and two-span) modeled by both the proposed and conventional abutment modeling schemes. Moreover, component-level fragility curves are developed using IDA results. The comparisons show that the conventional abutment modeling schemes significantly overestimate abutment foundation damage and underestimate the likelihood of deck unseating, column damage, and bearing displacement in the passive direction. Conversely, the proposed modeling scheme is able to capture the essential seismic responses of various components in seat abutment bridges. The consideration of backwall fracture in the modeling of abutment components enables a more rational seismic response assessment of bridges with backwalls, which are likely to be damaged during earthquakes, particularly for bridges which are seismically designed to protect abutment foundations.<br/></div> © 2021 John Wiley & Sons Ltd.},\nkey = {Fracture},\n%keywords = {Abutments (bridge);Foundations;Earthquakes;Risk assessment;Risk analysis;Finite element method;Seismic design;Seismic response;},\n%note = {Abutment bridges;Bearing displacements;Component levels;Conventional modeling;Design specification;Design strategies;Incremental dynamic analysis;Seismic vulnerability;},\nURL = {http://dx.doi.org/10.1002/eqe.3423},\n} \n\n\n
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\n
Field reconnaissance reports reveal the seismic vulnerability of bridge abutment foundations. To reduce the time and cost of postearthquake repair, modern seismic design specifications allow abutment backwalls to fracture before the supporting abutment foundations reach their maximum strength. This design strategy enables abutment backwalls to function as a fuse, thus protecting the abutment foundations from experiencing excessive forces and damage. This paper introduces a new abutment modeling scheme to capture the shear fracture mechanism of straight backwalls in seat abutments. To this end, a backwall connection spring is developed and incorporated into a spring system that simulates the behavior of various abutment components. The importance of considering the backwall fracture is examined by reviewing conventional modeling methodologies for abutments and building companion numerical models. Static pushover and incremental dynamic analyses (IDAs) were conducted for two bridges (single- and two-span) modeled by both the proposed and conventional abutment modeling schemes. Moreover, component-level fragility curves are developed using IDA results. The comparisons show that the conventional abutment modeling schemes significantly overestimate abutment foundation damage and underestimate the likelihood of deck unseating, column damage, and bearing displacement in the passive direction. Conversely, the proposed modeling scheme is able to capture the essential seismic responses of various components in seat abutment bridges. The consideration of backwall fracture in the modeling of abutment components enables a more rational seismic response assessment of bridges with backwalls, which are likely to be damaged during earthquakes, particularly for bridges which are seismically designed to protect abutment foundations.
© 2021 John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Nonlinear Thermo-Mechanical Full Coupling of Aluminum Oxide Particles Transport in Electrolytic Bath Using Lattice Boltzmann Method.\n \n \n \n \n\n\n \n Diop, M. A.; Shi, Z.; and Fafard, M.\n\n\n \n\n\n\n JOM, 73(3): 823 - 833. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"NonlinearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210409813105 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Nonlinear Thermo-Mechanical Full Coupling of Aluminum Oxide Particles Transport in Electrolytic Bath Using Lattice Boltzmann Method},\njournal = {JOM},\nauthor = {Diop, Mouhamadou A. and Shi, Zhongning and Fafard, Mario},\nvolume = {73},\nnumber = {3},\nyear = {2021},\npages = {823 - 833},\nissn = {10474838},\nabstract = {A three-dimensional numerical model has been developed to quantify the predominant phenomena roles on dynamics alumina particles between an electrolytic bath and the vicinity of gas bubbles. At the particle scale, the bath, regarded as turbulent flow, was modeled by a steady plane shear flow and solved using a lattice Boltzmann method. The coupling between the fluid and particle phases is carried out using an immersed boundary method to tackle the interface. This numerical scheme resolves the hydrodynamic perturbation induced by the alumina particles, and hence their interactions are described by Lagrangian particle tracking. The hydrodynamic effects combined with mechanical and thermal responses on the computation of the fluid system's stress intensity factors were investigated. An excellent convergence and accuracy were achieved for the transport and interaction of the alumina particle model.<br/> © 2021, The Minerals, Metals & Materials Society.},\nkey = {Hydrodynamics},\n%keywords = {Kinetic theory;Shear flow;Alumina;Aluminum oxide;Turbulent flow;},\n%note = {Aluminum oxide particles;Electrolytic baths;Hydrodynamic effect;Immersed boundary methods;Lagrangian particle tracking;Lattice Boltzmann method;Plane shear flows;Three-dimensional numerical modeling;},\nURL = {http://dx.doi.org/10.1007/s11837-020-04545-2},\n} \n\n\n
\n
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\n A three-dimensional numerical model has been developed to quantify the predominant phenomena roles on dynamics alumina particles between an electrolytic bath and the vicinity of gas bubbles. At the particle scale, the bath, regarded as turbulent flow, was modeled by a steady plane shear flow and solved using a lattice Boltzmann method. The coupling between the fluid and particle phases is carried out using an immersed boundary method to tackle the interface. This numerical scheme resolves the hydrodynamic perturbation induced by the alumina particles, and hence their interactions are described by Lagrangian particle tracking. The hydrodynamic effects combined with mechanical and thermal responses on the computation of the fluid system's stress intensity factors were investigated. An excellent convergence and accuracy were achieved for the transport and interaction of the alumina particle model.
© 2021, The Minerals, Metals & Materials Society.\n
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\n \n\n \n \n \n \n \n \n Concrete Columns Reinforced with GFRP and BFRP Bars under Concentric and Eccentric Loads: Experimental Testing and Analytical Investigation.\n \n \n \n \n\n\n \n Elmesalami, N.; Abed, F.; and Refai, A. E.\n\n\n \n\n\n\n Journal of Composites for Construction, 25(2). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ConcretePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210309800866 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Concrete Columns Reinforced with GFRP and BFRP Bars under Concentric and Eccentric Loads: Experimental Testing and Analytical Investigation},\njournal = {Journal of Composites for Construction},\nauthor = {Elmesalami, Nouran and Abed, Farid and Refai, Ahmed El},\nvolume = {25},\nnumber = {2},\nyear = {2021},\nissn = {10900268},\nabstract = {Twelve concrete columns reinforced longitudinally with fiber-reinforced polymer (FRP) bars were tested under both concentric and eccentric loadings. The investigated parameters were the type of the FRP bar, the longitudinal reinforcement ratio, and the load eccentricity-to-width ratio. The test results showed that the columns reinforced with basalt-FRP (BFRP) and glass-FRP (GFRP) experienced similar load-carrying capacity with a difference of less than 5%. Both types of columns attained lower ultimate capacity than their steel-reinforced counterparts. The contribution of the GFRP and BFRP bars to the ultimate capacity of the columns was similar, approximately 11% of the capacity, as compared to 31% for the steel bars. The effect of increasing the reinforcement ratio on the capacity was more pronounced in the eccentric FRP-reinforced concrete (FRP-RC) columns than the concentric ones. The analytical investigation showed that ignoring the strength contribution of the FRP bars, as recommended by most of the current codes and design guidelines, would result in conservative predictions. It also showed that current Canadian design code recommendation limiting the strains in FRP bars in compression to 2,000 μ yielded reasonable predictions of the column capacity.<br/> © 2021 American Society of Civil Engineers.},\nkey = {Basalt},\n%keywords = {Concrete construction;Reinforced concrete;Fiber reinforced plastics;Concrete testing;},\n%note = {Analytical investigations;Eccentric loading;Experimental testing;Fiber reinforced polymer bars;Load eccentricity;Longitudinal reinforcement;Reinforcement ratios;Ultimate capacity;},\nURL = {http://dx.doi.org/10.1061/(ASCE)CC.1943-5614.0001115},\n} \n\n\n
\n
\n\n\n
\n Twelve concrete columns reinforced longitudinally with fiber-reinforced polymer (FRP) bars were tested under both concentric and eccentric loadings. The investigated parameters were the type of the FRP bar, the longitudinal reinforcement ratio, and the load eccentricity-to-width ratio. The test results showed that the columns reinforced with basalt-FRP (BFRP) and glass-FRP (GFRP) experienced similar load-carrying capacity with a difference of less than 5%. Both types of columns attained lower ultimate capacity than their steel-reinforced counterparts. The contribution of the GFRP and BFRP bars to the ultimate capacity of the columns was similar, approximately 11% of the capacity, as compared to 31% for the steel bars. The effect of increasing the reinforcement ratio on the capacity was more pronounced in the eccentric FRP-reinforced concrete (FRP-RC) columns than the concentric ones. The analytical investigation showed that ignoring the strength contribution of the FRP bars, as recommended by most of the current codes and design guidelines, would result in conservative predictions. It also showed that current Canadian design code recommendation limiting the strains in FRP bars in compression to 2,000 μ yielded reasonable predictions of the column capacity.
© 2021 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Investigation of small-to large-strain moduli correlations of normally consolidated granular soils.\n \n \n \n \n\n\n \n Lashin, I.; Ghali, M.; Hussien, M. N.; Chekired, M.; and Karray, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 58(1): 1 - 22. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"InvestigationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210209755236 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigation of small-to large-strain moduli correlations of normally consolidated granular soils},\njournal = {Canadian Geotechnical Journal},\nauthor = {Lashin, Ibrahim and Ghali, Michael and Hussien, Mahmoud N. and Chekired, Mohamed and Karray, Mourad},\nvolume = {58},\nnumber = {1},\nyear = {2021},\npages = {1 - 22},\nissn = {00083674},\nabstract = {The establishment of correlations between the small-strain shear modulus (G<inf>o</inf>) and other soil parameters (such as the oedometer constrained modulus, M<inf>oedo</inf>) at large deformations constitutes an important step toward more precise modeling of soil deformation behavior. In this study, the shear wave velocities (V<inf>s</inf>) of 22 different granular soils of various physical characteristics were measured experimentally using the piezoelectric ring-actuator technique (P-RAT) incorporated in the conventional oedometer cell. For each sample tested, the development of M<inf>oedo</inf> with the development of relative density (I<inf>d</inf>), as well as the void ratio (e), was recorded. Then, the obtained V<inf>s</inf> and M<inf>oedo</inf>/G<inf>o</inf> trends were correlated to the physical parameters of the tested granular soils with the development of e and I<inf>d</inf>. A practical application employing the achievements in geotechnical engineering design was also evaluated. Based on the proposed correlations, geotechnical designers can easily estimate in situ stress– settlement behavior from the predicted M<inf>oedo</inf> and I<inf>d</inf> values using simple in situ measurements.<br/> © 2020, Canadian Science Publishing. All rights reserved.},\nkey = {Elastic moduli},\n%keywords = {Shear strain;Wave propagation;Piezoelectricity;Rats;Soils;Geotechnical engineering;Shear waves;Deformation;Shear flow;Soil mechanics;},\n%note = {In-situ measurement;Physical characteristics;Physical parameters;Piezoelectric rings;Relative density;Settlement behaviors;Shear wave velocity;Small-strain shear modulus;},\nURL = {http://dx.doi.org/10.1139/cgj-2019-0741},\n} \n\n\n
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\n The establishment of correlations between the small-strain shear modulus (Go) and other soil parameters (such as the oedometer constrained modulus, Moedo) at large deformations constitutes an important step toward more precise modeling of soil deformation behavior. In this study, the shear wave velocities (Vs) of 22 different granular soils of various physical characteristics were measured experimentally using the piezoelectric ring-actuator technique (P-RAT) incorporated in the conventional oedometer cell. For each sample tested, the development of Moedo with the development of relative density (Id), as well as the void ratio (e), was recorded. Then, the obtained Vs and Moedo/Go trends were correlated to the physical parameters of the tested granular soils with the development of e and Id. A practical application employing the achievements in geotechnical engineering design was also evaluated. Based on the proposed correlations, geotechnical designers can easily estimate in situ stress– settlement behavior from the predicted Moedo and Id values using simple in situ measurements.
© 2020, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Impact of climate change on the vulnerability of drinking water intakes in a northern region.\n \n \n \n \n\n\n \n Leveque, B.; Burnet, J.; Dorner, S.; and Bichai, F.\n\n\n \n\n\n\n Sustainable Cities and Society, 66. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210209751377 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact of climate change on the vulnerability of drinking water intakes in a northern region},\njournal = {Sustainable Cities and Society},\nauthor = {Leveque, B. and Burnet, J.-B. and Dorner, S. and Bichai, F.},\nvolume = {66},\nyear = {2021},\nissn = {22106707},\nabstract = {<div data-language="eng" data-ev-field="abstract">Climate change impacts the vulnerability of drinking water sources to contamination and water shortages. This review highlights key risk factors along the impact chain of climate change on water supply security, from precipitation and runoff to surface water quality and availability at drinking water intakes. How climate impacts water quantity (hydrology) and quality (fate, transport and loads of contaminants, via soils, forests, and urban water infrastructure) is examined across the scientific literature. An emphasis is placed on high-latitude regions, where the kinetics and intensity of projected changes are high. The province of Quebec, Canada, is used as a study area that covers diverse land and climate conditions, with extended relevance at a broader scale globally. This review aims at guiding researchers and water managers in considering the climate-related evolution of a range of threats when assessing the vulnerability of drinking water systems. It highlights how climate change increases the seasonal risks of water supply insecurity in a northern region, thereby increasing socioeconomic and public health risks. Accounting for multiple feedback effects is a major cause of uncertainty in assessing future risks in drinking water supplies. Under deep uncertainty, a paradigm change in assessing climate impacts on water supplies is needed.<br/></div> © 2020 Elsevier Ltd},\nkey = {Water supply},\n%keywords = {Water quality;Surface waters;Climate change;Potable water;Urban transportation;Health risks;Uncertainty analysis;Risk assessment;},\n%note = {Climate change impact;Climate condition;Deep uncertainties;Drinking water sources;Drinking water systems;High-latitude regions;Precipitation and runoff;Scientific literature;},\nURL = {http://dx.doi.org/10.1016/j.scs.2020.102656},\n} \n\n\n
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\n
Climate change impacts the vulnerability of drinking water sources to contamination and water shortages. This review highlights key risk factors along the impact chain of climate change on water supply security, from precipitation and runoff to surface water quality and availability at drinking water intakes. How climate impacts water quantity (hydrology) and quality (fate, transport and loads of contaminants, via soils, forests, and urban water infrastructure) is examined across the scientific literature. An emphasis is placed on high-latitude regions, where the kinetics and intensity of projected changes are high. The province of Quebec, Canada, is used as a study area that covers diverse land and climate conditions, with extended relevance at a broader scale globally. This review aims at guiding researchers and water managers in considering the climate-related evolution of a range of threats when assessing the vulnerability of drinking water systems. It highlights how climate change increases the seasonal risks of water supply insecurity in a northern region, thereby increasing socioeconomic and public health risks. Accounting for multiple feedback effects is a major cause of uncertainty in assessing future risks in drinking water supplies. Under deep uncertainty, a paradigm change in assessing climate impacts on water supplies is needed.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n A review of wind loads on canopies attached to walls of low-rise buildings.\n \n \n \n \n\n\n \n Sakib, F. A.; Stathopoulos, T.; and Bhowmick, A. K.\n\n\n \n\n\n\n Engineering Structures, 230. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210209768233 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A review of wind loads on canopies attached to walls of low-rise buildings},\njournal = {Engineering Structures},\nauthor = {Sakib, Faruk Ahmed and Stathopoulos, Ted and Bhowmick, Anjan K.},\nvolume = {230},\nyear = {2021},\nissn = {01410296},\nabstract = {Overhangs are commonly used in residential and industrial buildings for the convenience of residents and users. Canopies are very prone to wind loading due to the suction developing on their upper surface along with the pressure occurring on their lower surface (for most wind directions), which together may generate critical uplift forces causing serious damage. The paper presents past research on wind effects on canopies of low buildings, originated mainly from atmospheric boundary layer wind tunnel studies. Provisions for wind pressure on canopies in different wind standards and codes of practice are also reviewed. Findings of past and recent studies are then compared with the provisions of various National Codes on wind loading on canopies. Comparisons of the experimental results with some computational results and the provisions of wind codes and standards show significant discrepancies. Some of these differences are due to the variety of configurations used in the previous studies, e.g. building geometry, size and slope of overhangs, canopy location on the wall(s), existence of openings, as well as roof shape (flat, gabled or curved / arched).<br/> © 2020 Elsevier Ltd},\nkey = {Atmospheric boundary layer},\n%keywords = {Walls (structural partitions);Structural dynamics;Office buildings;Codes (symbols);Wind tunnels;Wind effects;},\n%note = {Building geometry;Computational results;Industrial buildings;Low-rise buildings;National codes;Standards and codes;Wind codes and standards;Wind directions;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2020.111656},\n} \n\n\n
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\n Overhangs are commonly used in residential and industrial buildings for the convenience of residents and users. Canopies are very prone to wind loading due to the suction developing on their upper surface along with the pressure occurring on their lower surface (for most wind directions), which together may generate critical uplift forces causing serious damage. The paper presents past research on wind effects on canopies of low buildings, originated mainly from atmospheric boundary layer wind tunnel studies. Provisions for wind pressure on canopies in different wind standards and codes of practice are also reviewed. Findings of past and recent studies are then compared with the provisions of various National Codes on wind loading on canopies. Comparisons of the experimental results with some computational results and the provisions of wind codes and standards show significant discrepancies. Some of these differences are due to the variety of configurations used in the previous studies, e.g. building geometry, size and slope of overhangs, canopy location on the wall(s), existence of openings, as well as roof shape (flat, gabled or curved / arched).
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Towards comparable environmental product declarations of construction materials: Insights from a probabilistic comparative LCA approach.\n \n \n \n \n\n\n \n AzariJafari, H.; Guest, G.; Kirchain, R.; Gregory, J.; and Amor, B.\n\n\n \n\n\n\n Building and Environment, 190. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"TowardsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20210109731436 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Towards comparable environmental product declarations of construction materials: Insights from a probabilistic comparative LCA approach},\njournal = {Building and Environment},\nauthor = {AzariJafari, Hessam and Guest, Geoffrey and Kirchain, Randolph and Gregory, Jeremy and Amor, Ben},\nvolume = {190},\nyear = {2021},\nissn = {03601323},\nabstract = {The comparability of environmental product declarations (EPDs) and the heterogeneity of their life cycle assessment (LCA) methods are considered the main challenges facing the credibility of results. In this study, a probabilistic tool was proposed and developed to gain insight into what is necessary to achieve the unrealized vision of comparable EPDs. The developed framework incorporated several uncertainty sources, such as life cycle inventory and allocation rule choices, and data quality and variability of the input parameters in a consistent way. Then, the framework was applied to a case study of concrete mix designs. The comparative results of the industry benchmarks and the mix design population show that for a given compressive strength level, all the ternary blended cement mixtures have a statistically significant lower GWP than that of the industry-average benchmark. However, a 40 kg CO<inf>2</inf>eq difference in the comparative GWP results of portland cement and binary mixtures (with an average impact of 345 kg CO<inf>2</inf>eq) may not result in a statistically significant difference. The major source of variation in the stand-alone LCA results comes from the methodological choice of database selection with portland cement inventory data. However, the impact of methodological choices on the variance of the comparative results is trivial and the variability of portland cement content dominated the variance. Therefore, as long as the LCI database is representative of the context, the methodological choices may be a minor concern in the comparative analysis.<br/> © 2020 Elsevier Ltd},\nkey = {Portland cement},\n%keywords = {Carbon;Life cycle;Concrete mixtures;Binary mixtures;Compressive strength;},\n%note = {Comparative analysis;Concrete mix design;Environmental product declarations;Industry benchmarks;Life Cycle Assessment (LCA);Life Cycle Inventory;Statistically significant difference;Uncertainty sources;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2020.107542},\n} \n\n\n
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\n The comparability of environmental product declarations (EPDs) and the heterogeneity of their life cycle assessment (LCA) methods are considered the main challenges facing the credibility of results. In this study, a probabilistic tool was proposed and developed to gain insight into what is necessary to achieve the unrealized vision of comparable EPDs. The developed framework incorporated several uncertainty sources, such as life cycle inventory and allocation rule choices, and data quality and variability of the input parameters in a consistent way. Then, the framework was applied to a case study of concrete mix designs. The comparative results of the industry benchmarks and the mix design population show that for a given compressive strength level, all the ternary blended cement mixtures have a statistically significant lower GWP than that of the industry-average benchmark. However, a 40 kg CO2eq difference in the comparative GWP results of portland cement and binary mixtures (with an average impact of 345 kg CO2eq) may not result in a statistically significant difference. The major source of variation in the stand-alone LCA results comes from the methodological choice of database selection with portland cement inventory data. However, the impact of methodological choices on the variance of the comparative results is trivial and the variability of portland cement content dominated the variance. Therefore, as long as the LCI database is representative of the context, the methodological choices may be a minor concern in the comparative analysis.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Green Power Furnaces in Aluminum Cast House for Scrap Preheating Using CO2-Flue Gas.\n \n \n \n \n\n\n \n Diop, M. A.; Shi, Z.; Fafard, M.; Bousso, S. A.; Wenju, T.; and Wang, Z.\n\n\n \n\n\n\n Journal of Sustainable Metallurgy, 7(1): 46 - 59. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"GreenPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20210209738885 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Green Power Furnaces in Aluminum Cast House for Scrap Preheating Using CO2-Flue Gas},\njournal = {Journal of Sustainable Metallurgy},\nauthor = {Diop, Mouhamadou A. and Shi, Zhongning and Fafard, Mario and Bousso, Sokhna Awa and Wenju, Tao and Wang, Zhaowen},\nvolume = {7},\nnumber = {1},\nyear = {2021},\npages = {46 - 59},\nissn = {21993823},\nabstract = {Abstract: Implementing preheating furnaces in the aluminum industry, powered by waste heat, has been a subject of interest due to the economic and energy-saving benefits. Metal holding furnaces, keeping aluminum in a liquid state (approx. 760 °C) before casting, are powered by fuel burners. Hot flue gas escapes the cast house furnaces at very high temperatures close to the aluminum melting point and represents a significant energy loss. One can heat aluminum scrap by redirecting hot flue gases from the holding furnace to a metal scrap preheating furnace, which is to be melted, prior to loading them in the metal melting furnace. Introducing a preheating step, incredibly hot flue gas, will reduce the melting time required while saving energy. This present study examines the effectiveness of preheating aluminum sow and billet profiles with hot flue gases and find the optimal design considerations for a preheating furnace. Different approaches to achieve quantitative heat treatment in batch homogenizing furnaces were evaluated. Heat transfer modeling, analysis of flue gas furnace, and sows’ temperature coupled with thermodynamic analysis improve thermal equation prediction precision. Turbulent fluid flow and heat transfer physics are used in a computational fluid dynamics model to simulate aluminum heating by hot gas. Graphical Abstract: [Figure not available: see fulltext.]<br/> © 2021, The Minerals, Metals & Materials Society.},\nkey = {Flue gases},\n%keywords = {Furnaces;Computational fluid dynamics;Thermoanalysis;Waste heat utilization;Preheating;Flues;Fuels;Waste heat;Energy dissipation;Energy efficiency;Flow of fluids;},\n%note = {Aluminum industry;Computational fluid dynamics modeling;Energy-saving benefits;Heat transfer model;Prediction precision;Thermal equations;Thermo dynamic analysis;Turbulent fluid flow;},\nURL = {http://dx.doi.org/10.1007/s40831-020-00323-1},\n} \n\n\n
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\n Abstract: Implementing preheating furnaces in the aluminum industry, powered by waste heat, has been a subject of interest due to the economic and energy-saving benefits. Metal holding furnaces, keeping aluminum in a liquid state (approx. 760 °C) before casting, are powered by fuel burners. Hot flue gas escapes the cast house furnaces at very high temperatures close to the aluminum melting point and represents a significant energy loss. One can heat aluminum scrap by redirecting hot flue gases from the holding furnace to a metal scrap preheating furnace, which is to be melted, prior to loading them in the metal melting furnace. Introducing a preheating step, incredibly hot flue gas, will reduce the melting time required while saving energy. This present study examines the effectiveness of preheating aluminum sow and billet profiles with hot flue gases and find the optimal design considerations for a preheating furnace. Different approaches to achieve quantitative heat treatment in batch homogenizing furnaces were evaluated. Heat transfer modeling, analysis of flue gas furnace, and sows’ temperature coupled with thermodynamic analysis improve thermal equation prediction precision. Turbulent fluid flow and heat transfer physics are used in a computational fluid dynamics model to simulate aluminum heating by hot gas. Graphical Abstract: [Figure not available: see fulltext.]
© 2021, The Minerals, Metals & Materials Society.\n
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\n \n\n \n \n \n \n \n \n Structural Behavior of Screwed Connections in Cold-Formed Steel Beams.\n \n \n \n \n\n\n \n Huynh, M. T.; Pham, C. H.; Rogers, C. A.; and Hancock, G. J.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 147(3). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"StructuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20210109728880 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Structural Behavior of Screwed Connections in Cold-Formed Steel Beams},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Huynh, Minh Toan and Pham, Cao Hung and Rogers, Colin A. and Hancock, Gregory J.},\nvolume = {147},\nnumber = {3},\nyear = {2021},\nissn = {07339445},\nabstract = {Two test series were carried out on angle cleat connections between cold-formed channels as beams and rectangular hollow sections as support members. The objective of the tests was to determine the effect of connection rotation from the beam on the shear capacity of the connection. Self-drilling screws were used to attach the channels to the angle cleats with the failure limit states always occurring in this part of the connection. A dual actuator test apparatus that could apply controlled displacement and rotation to the beams was used. The specimens contained different thicknesses of the channels, which allowed for two limit states involving failure modes of the screws fracturing in shear and bearing as well as tilting failure of the screws in the channel sheet material. The experimental results show the effect of rotation on reducing the shear capacity of the screwed connections. An analytical model for the connection is developed using the relation between the bearing force and deformation of the individual screw connections.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Self drilling screws},\n%keywords = {Bearings (machine parts);Studs (structural members);Bearing capacity;Shear flow;Steel beams and girders;},\n%note = {Bearing forces;Cold-formed channels;Cold-formed steel beams;Connection rotation;Rectangular hollow sections;Screw connections;Screwed connections;Structural behaviors;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002937},\n} \n\n\n
\n
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\n Two test series were carried out on angle cleat connections between cold-formed channels as beams and rectangular hollow sections as support members. The objective of the tests was to determine the effect of connection rotation from the beam on the shear capacity of the connection. Self-drilling screws were used to attach the channels to the angle cleats with the failure limit states always occurring in this part of the connection. A dual actuator test apparatus that could apply controlled displacement and rotation to the beams was used. The specimens contained different thicknesses of the channels, which allowed for two limit states involving failure modes of the screws fracturing in shear and bearing as well as tilting failure of the screws in the channel sheet material. The experimental results show the effect of rotation on reducing the shear capacity of the screwed connections. An analytical model for the connection is developed using the relation between the bearing force and deformation of the individual screw connections.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Estimating Exposure Roughness Based on Google Earth.\n \n \n \n \n\n\n \n Yu, J.; Stathopoulos, T.; and Li, M.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 147(3). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"EstimatingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20205309702150 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Estimating Exposure Roughness Based on Google Earth},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Yu, Jianhan and Stathopoulos, Ted and Li, Mingshui},\nvolume = {147},\nnumber = {3},\nyear = {2021},\nissn = {07339445},\nabstract = {Exposure roughness is significant in the evaluation of design wind loads. The roughness length (z0) is a key parameter to determine the exposure coefficient. In current wind load provisions, z0 is determined generally according to the exposure categories. However, subjective interpretation of upstream roughness by designers may lead to disagreements of exposure type. To address this issue, a more accurate method of determining the value of z0 is proposed in this paper. This approach uses morphometric methods in combination with the application of Google Earth Pro or equivalent. A three-dimensional modeling methodology is proposed which is based on the two-dimensional images captured in Google Earth Pro. The city center of London, UK and Tampa International Airport, US are chosen as case studies to verify the accuracy of the proposed method by comparison with available measured data. The comparison shows that this method works well for the estimation of z0 of upstream exposure.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Wind stress},\n%keywords = {Aerodynamic loads;Three dimensional computer graphics;},\n%note = {Evaluation of designs;Google earths;Morphometric method;Roughness length;Tampa International Airport;Three-dimensional model;Two dimensional images;Wind load provisions;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002913},\n} \n\n\n
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\n\n\n
\n Exposure roughness is significant in the evaluation of design wind loads. The roughness length (z0) is a key parameter to determine the exposure coefficient. In current wind load provisions, z0 is determined generally according to the exposure categories. However, subjective interpretation of upstream roughness by designers may lead to disagreements of exposure type. To address this issue, a more accurate method of determining the value of z0 is proposed in this paper. This approach uses morphometric methods in combination with the application of Google Earth Pro or equivalent. A three-dimensional modeling methodology is proposed which is based on the two-dimensional images captured in Google Earth Pro. The city center of London, UK and Tampa International Airport, US are chosen as case studies to verify the accuracy of the proposed method by comparison with available measured data. The comparison shows that this method works well for the estimation of z0 of upstream exposure.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Sustainability, climate resiliency, and mitigation capacity of geothermal heat pump systems in cold regions.\n \n \n \n \n\n\n \n Gheysari, A. F.; Hollander, H. M.; Maghoul, P.; and Shalaby, A.\n\n\n \n\n\n\n Geothermics, 91. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"Sustainability,Paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20205209671594 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Sustainability, climate resiliency, and mitigation capacity of geothermal heat pump systems in cold regions},\njournal = {Geothermics},\nauthor = {Gheysari, Ali Fatolahzadeh and Hollander, Hartmut M. and Maghoul, Pooneh and Shalaby, Ahmed},\nvolume = {91},\nyear = {2021},\nissn = {03756505},\nabstract = {<div data-language="eng" data-ev-field="abstract">Geothermal heat pump (GHP) systems have recently gained popularity in providing heat to buildings. In this study, the short-term and long-term performance of closed-loop horizontal GHP systems in cold regions and the effectiveness of seasonal balancing were investigated. A period of 50 years was simulated to cover the life of a conventional system. A repeating block of heat exchangers at three depths was modeled in a series of 3D multi-physics finite element simulations. Two operation modes were defined, representing the non-balanced mode and the seasonal balancing through the injection of lake water in summer. The climate conditions at the ground surface were explicitly modeled by defining a temperature boundary condition. A novel AI framework was developed to generate the projections of ground surface temperatures from air temperature and other atmospheric variables. An artificial neural network was trained using the air and ground temperature measurements at the nearby weather station. Several training approaches were compared to minimize prediction errors. The model was then used to convert the air temperatures from downscaled outputs of the CanESM2 climate model into surface temperatures. Finite element models, representing the two operation modes under three climate change scenarios and various heat exchanger spacing, were simulated and verified by comparing the resulting ground temperatures with the local measurements. The outputs were processed into extraction power, thermal output, and carbon emissions. Results suggest that in order to attain a stable heat extraction throughout a year, heat exchangers should be placed at depths that are not affected by seasonal variations of surface conditions. Simulations revealed thermal depletion and its inverse correlation with heat exchanger spacing. The seasonal balancing operation approach showed enhancement in total thermal output by 55%. The system was found to be resilient when subjected to the major climate pathways. In a rough estimate based on the average carbon footprint of electricity production in Canada, a system with 100 heat exchangers was found to save up to 800 tons and 1300 tons of equivalent CO<inf>2</inf> emissions over its life, under the non-balanced and balanced operation modes, respectively.<br/></div> © 2020 Elsevier Ltd},\nkey = {Sustainable development},\n%keywords = {Atmospheric temperature;Carbon footprint;Climate change;Climate models;Extraction;Geothermal energy;Neural networks;Surface properties;Temperature measurement;},\n%note = {Adaptation;Air temperature;Closed-loop;Cold regions;Geothermal heat pump systems;Ground temperature;Long term performance;Mitigation;Operation mode;Thermal;},\nURL = {http://dx.doi.org/10.1016/j.geothermics.2020.101979},\n} \n\n\n
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\n
Geothermal heat pump (GHP) systems have recently gained popularity in providing heat to buildings. In this study, the short-term and long-term performance of closed-loop horizontal GHP systems in cold regions and the effectiveness of seasonal balancing were investigated. A period of 50 years was simulated to cover the life of a conventional system. A repeating block of heat exchangers at three depths was modeled in a series of 3D multi-physics finite element simulations. Two operation modes were defined, representing the non-balanced mode and the seasonal balancing through the injection of lake water in summer. The climate conditions at the ground surface were explicitly modeled by defining a temperature boundary condition. A novel AI framework was developed to generate the projections of ground surface temperatures from air temperature and other atmospheric variables. An artificial neural network was trained using the air and ground temperature measurements at the nearby weather station. Several training approaches were compared to minimize prediction errors. The model was then used to convert the air temperatures from downscaled outputs of the CanESM2 climate model into surface temperatures. Finite element models, representing the two operation modes under three climate change scenarios and various heat exchanger spacing, were simulated and verified by comparing the resulting ground temperatures with the local measurements. The outputs were processed into extraction power, thermal output, and carbon emissions. Results suggest that in order to attain a stable heat extraction throughout a year, heat exchangers should be placed at depths that are not affected by seasonal variations of surface conditions. Simulations revealed thermal depletion and its inverse correlation with heat exchanger spacing. The seasonal balancing operation approach showed enhancement in total thermal output by 55%. The system was found to be resilient when subjected to the major climate pathways. In a rough estimate based on the average carbon footprint of electricity production in Canada, a system with 100 heat exchangers was found to save up to 800 tons and 1300 tons of equivalent CO2 emissions over its life, under the non-balanced and balanced operation modes, respectively.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Earthquake-resistant design of steel frames with intentionally eccentric braces.\n \n \n \n \n\n\n \n Gonzalez Urena, A.; Tremblay, R.; and Rogers, C. A.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 178. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"Earthquake-resistantPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20205209670562 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Earthquake-resistant design of steel frames with intentionally eccentric braces},\njournal = {Journal of Constructional Steel Research},\nauthor = {Gonzalez Urena, Andres and Tremblay, Robert and Rogers, Colin A.},\nvolume = {178},\nyear = {2021},\nissn = {0143974X},\nabstract = {Braces with Intentional Eccentricity (BIEs) have been proposed to overcome some of the shortcomings of Concentrically Braced Frames (CBFs), namely the implications of their inherently stiff nature, their limited post-yielding stiffness and the susceptibility of Hollow Structural Sections (HSSs) to premature local buckling and fracture, and the excessive overstrength that may result from the design codes limits on the local and global slenderness. However, the application of BIEs for use in buildings has not yet been attempted, nor has their implementation in a global design approach yet been addressed. In this paper, a procedure based on the Direct Displacement Based Design (DDBD) method is employed in the seismic design of Frames with Intentionally Eccentric Braces (FIEBs). Buildings of 4, 8 and 12 storeys are designed as FIEBs with HSS brace members, with target drift ratios of 1.5% and 2.5%, and as Special CBFs for comparison purposes. The performance of the resulting buildings is assessed through Non-Linear Response-History Analysis. The results show that the employed design procedure is well suited to FIEBs, that their seismic performance is satisfactory and complies with the proposed performance objectives, and that they can constitute an economically advantageous alternative to conventional CBFs.<br/> © 2020 Elsevier Ltd},\nkey = {Seismic design},\n%keywords = {Earthquakes;Structural frames;},\n%note = {Concentrically braced frames;Design procedure;Direct displacement-based design;Earthquake-resistant design;Hollow structural sections;Non-linear response;Performance objective;Seismic Performance;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2020.106483},\n} \n\n\n
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\n Braces with Intentional Eccentricity (BIEs) have been proposed to overcome some of the shortcomings of Concentrically Braced Frames (CBFs), namely the implications of their inherently stiff nature, their limited post-yielding stiffness and the susceptibility of Hollow Structural Sections (HSSs) to premature local buckling and fracture, and the excessive overstrength that may result from the design codes limits on the local and global slenderness. However, the application of BIEs for use in buildings has not yet been attempted, nor has their implementation in a global design approach yet been addressed. In this paper, a procedure based on the Direct Displacement Based Design (DDBD) method is employed in the seismic design of Frames with Intentionally Eccentric Braces (FIEBs). Buildings of 4, 8 and 12 storeys are designed as FIEBs with HSS brace members, with target drift ratios of 1.5% and 2.5%, and as Special CBFs for comparison purposes. The performance of the resulting buildings is assessed through Non-Linear Response-History Analysis. The results show that the employed design procedure is well suited to FIEBs, that their seismic performance is satisfactory and complies with the proposed performance objectives, and that they can constitute an economically advantageous alternative to conventional CBFs.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Hydrodynamic groundwater modeling and hydrochemical conceptualization of the mining area of Moulares Redeyef (southwestern of Tunisia): New local insights.\n \n \n \n \n\n\n \n Hamdi, M.; Goita, K.; Karaouli, F.; and Zagrarni, M. F.\n\n\n \n\n\n\n Physics and Chemistry of the Earth, 121. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"HydrodynamicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20205209670673 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Hydrodynamic groundwater modeling and hydrochemical conceptualization of the mining area of Moulares Redeyef (southwestern of Tunisia): New local insights},\njournal = {Physics and Chemistry of the Earth},\nauthor = {Hamdi, Mohamed and Goita, Kalifa and Karaouli, Fatma and Zagrarni, Mohamed Faouzi},\nvolume = {121},\nyear = {2021},\nissn = {14747065},\nabstract = {The Moulares Redeyef Mining basin (MMR-B) is located on Southwestern of Tunisia. The problem of groundwater mineralization in this basin has long been attributed to the significant decline in groundwater reserves. In order to quantify the aquifers reserves and identify processes and factors governing the groundwater quality, a detailed multidisciplinary study was proposed in this study. The approach used various GIS databases, including hydrodynamic characteristics, geochemistry, geology and climatic parameters. A Modflow hydrodynamic model was developed over 67-year modeling period (1953–2020) and many simulations were performed. Water samples were collected from 39 boreholes from the deep aquifer and 13 wells from the superficial aquifer in Tabeddit area. The hydrogeological model shows a flow convergence zone around the Tabeddit area. The reserve of the aquifer system was simulated to 10 Mm<sup>3</sup>/year for 2020, while it was 26 Mm<sup>3</sup>/year in 2000. Yet, 61% of exploitable reserves was consumed in 20 years. The quality of groundwater showed that MMR-b is characterized by 4 main trends: Ca–Mg–HCO<inf>3</inf>, Ca–Mg–SO<inf>4</inf>, Na–Cl–NO<inf>3</inf> and Na–Mg–HCO<inf>3</inf>. For the heavy metals, the 13 alluvial groundwater samples contain high concentration of Cadmium that exceed the Tunisian Standards. Finally, a Risk Index of Aquifer is elaborated based on the Modflow model and the geochemical quality. The index gives that the PQ layer is under very high risk and the M aquifer is in a moderate situation. Accordingly, it is recommended that the mining deciders revise their exploitation strategy urgently in order to preserve water resources for future use.<br/> © 2020 Elsevier Ltd},\nkey = {Aquifers},\n%keywords = {Groundwater resources;Water quality;Geographic information systems;Groundwater geochemistry;Chemical analysis;Heavy metals;Risk assessment;Hydrodynamics;Hydrogeology;Hydrochemistry;},\n%note = {Climatic parameters;Flow convergence;Groundwater mineralizations;Groundwater modeling;Groundwater reserves;Hydrodynamic characteristics;Hydrodynamic model;Hydrogeological models;},\nURL = {http://dx.doi.org/10.1016/j.pce.2020.102974},\n} \n\n\n
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\n The Moulares Redeyef Mining basin (MMR-B) is located on Southwestern of Tunisia. The problem of groundwater mineralization in this basin has long been attributed to the significant decline in groundwater reserves. In order to quantify the aquifers reserves and identify processes and factors governing the groundwater quality, a detailed multidisciplinary study was proposed in this study. The approach used various GIS databases, including hydrodynamic characteristics, geochemistry, geology and climatic parameters. A Modflow hydrodynamic model was developed over 67-year modeling period (1953–2020) and many simulations were performed. Water samples were collected from 39 boreholes from the deep aquifer and 13 wells from the superficial aquifer in Tabeddit area. The hydrogeological model shows a flow convergence zone around the Tabeddit area. The reserve of the aquifer system was simulated to 10 Mm3/year for 2020, while it was 26 Mm3/year in 2000. Yet, 61% of exploitable reserves was consumed in 20 years. The quality of groundwater showed that MMR-b is characterized by 4 main trends: Ca–Mg–HCO3, Ca–Mg–SO4, Na–Cl–NO3 and Na–Mg–HCO3. For the heavy metals, the 13 alluvial groundwater samples contain high concentration of Cadmium that exceed the Tunisian Standards. Finally, a Risk Index of Aquifer is elaborated based on the Modflow model and the geochemical quality. The index gives that the PQ layer is under very high risk and the M aquifer is in a moderate situation. Accordingly, it is recommended that the mining deciders revise their exploitation strategy urgently in order to preserve water resources for future use.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Shake table test of a two-story steel building seismically retrofitted using gravity-controlled rocking braced frame system.\n \n \n \n \n\n\n \n Mottier, P.; Tremblay, R.; and Rogers, C.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 50(6): 1576 - 1594. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ShakePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20205209682323 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shake table test of a two-story steel building seismically retrofitted using gravity-controlled rocking braced frame system},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Mottier, Paul and Tremblay, Robert and Rogers, Colin},\nvolume = {50},\nnumber = {6},\nyear = {2021},\npages = {1576 - 1594},\nissn = {00988847},\nabstract = {<div data-language="eng" data-ev-field="abstract">This article describes a shake table test program that was conducted to investigate the seismic behavior of a half-scale two-story gravity-controlled rocking braced steel frame building. In this system, braced frame columns are designed to uplift from the foundation under severe earthquakes to reduce the seismic force demands on the frame members. Self-centering capacity is solely provided by the gravity loads carried by the rocking frame. Energy dissipative devices are added at the base of the braced frame columns to control drifts. The system can be used for new structures as well as the retrofit of seismically deficient structures. In the test program, the specimen represented a gravity-controlled rocking frame that had been proposed for seismic retrofit in a previous study. The test structure was subjected to ground motions expected for two site classes in two seismically active regions in Canada. Three different energy dissipative devices located at the rocking interface were studied: friction, friction spring dampers, and steel bars yielding in tension and elastically buckling in compression. The focus of the tests was on peak axial loads in the columns and additional moments and shears in the beams resulting from column impact upon rocking. Axial loads in the braces and columns from higher mode response were also examined. The tests revealed significant increases in beam forces due to column impacts. Large axial forces due to the second vibration mode response were measured in the second story braces. A numerical model is proposed to accurately predict the measured force demands.<br/></div> © 2020 John Wiley & Sons Ltd.},\nkey = {Friction},\n%keywords = {Axial loads;Earthquakes;Retrofitting;Steel testing;Software testing;Structural frames;},\n%note = {Additional moment;Braced steel frames;Deficient structure;Dissipative devices;Seismic retrofits;Seismically active region;Severe earthquakes;Shake table tests;},\nURL = {http://dx.doi.org/10.1002/eqe.3411},\n} \n\n\n
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This article describes a shake table test program that was conducted to investigate the seismic behavior of a half-scale two-story gravity-controlled rocking braced steel frame building. In this system, braced frame columns are designed to uplift from the foundation under severe earthquakes to reduce the seismic force demands on the frame members. Self-centering capacity is solely provided by the gravity loads carried by the rocking frame. Energy dissipative devices are added at the base of the braced frame columns to control drifts. The system can be used for new structures as well as the retrofit of seismically deficient structures. In the test program, the specimen represented a gravity-controlled rocking frame that had been proposed for seismic retrofit in a previous study. The test structure was subjected to ground motions expected for two site classes in two seismically active regions in Canada. Three different energy dissipative devices located at the rocking interface were studied: friction, friction spring dampers, and steel bars yielding in tension and elastically buckling in compression. The focus of the tests was on peak axial loads in the columns and additional moments and shears in the beams resulting from column impact upon rocking. Axial loads in the braces and columns from higher mode response were also examined. The tests revealed significant increases in beam forces due to column impacts. Large axial forces due to the second vibration mode response were measured in the second story braces. A numerical model is proposed to accurately predict the measured force demands.
© 2020 John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Efficient Arrangement of Friction Damped Bracing System (FDBS) for Multi-storey Steel Frame.\n \n \n \n \n\n\n \n Bagchi, S.; Sarkar, A.; and Bagchi, A.\n\n\n \n\n\n\n In volume 103, pages 397 - 412, Mandi, India, 2021. \n \n\n\n\n
\n\n\n\n \n \n \"EfficientPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20205109646919 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Efficient Arrangement of Friction Damped Bracing System (FDBS) for Multi-storey Steel Frame},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Bagchi, Saikat and Sarkar, Avirup and Bagchi, Ashutosh},\nvolume = {103},\nyear = {2021},\npages = {397 - 412},\nissn = {23662557},\naddress = {Mandi, India},\nabstract = {The Friction Damped Bracing System (FDBS) is able to significantly control the vibration of framed structure without dissipating energy through the inelastic yielding of its structural components. Therefore, it is a useful tool to design the structural system by isolating the energy dissipation components at some specific as well as desired locations. This purposeful isolation of the critical components helps, in turn, to monitor the health of the system efficiently, especially for the large and complicated systems such as process plant structures, offshore structure, etc. Therefore, effective placement of the energy dissipation devices in terms of their numbers as well as locations is essential to meet the optimum requirement of serviceability, safety, and stability. In this article, FDBS is modelled numerically following standard Friction Damper guideline. The 2D building frames with FDBS at various locations are used to study the responses of multi-storey building frames having different vertical bracing configurations. Locations of the energy dissipation devices are altered for each of the structures to study the effect of load flow through the desired load path. It is intended to isolate the FDBS in such a way so that the operational constraints do not interfere with the monitoring and maintenance of the critical dissipating system, which is the lifeline for the structural stability. Nonlinear time history analysis is performed for each of the frames for a scaled ground motion obtained using Conditional Mean Spectra for the city of Vancouver. Energy dissipation behavior of the structures is compared in order to comprehend the effect of damper arrangement. Load versus deflection behaviour of the structures at different levels indicate that structures with regular configurations show better behaviour in comparison to the customized structures with special configurations. Therefore, it is concluded that FDBS enabled structural systems are suitable as well as necessary for the complicated structures where the horizontal load transfer system is expected to be flexible to meet the process requirements.<br/> © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.},\nkey = {Energy dissipation},\n%keywords = {Friction;Structural health monitoring;Offshore oil well production;System stability;Horizontal wells;Location;},\n%note = {Bracing configuration;Complicated structures;Conditional mean spectrum;Energy dissipation devices;Multistorey buildings;Nonlinear time history analysis;Operational constraints;Structural stabilities;},\nURL = {http://dx.doi.org/10.1007/978-981-15-8138-0_31},\n} \n\n\n
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\n The Friction Damped Bracing System (FDBS) is able to significantly control the vibration of framed structure without dissipating energy through the inelastic yielding of its structural components. Therefore, it is a useful tool to design the structural system by isolating the energy dissipation components at some specific as well as desired locations. This purposeful isolation of the critical components helps, in turn, to monitor the health of the system efficiently, especially for the large and complicated systems such as process plant structures, offshore structure, etc. Therefore, effective placement of the energy dissipation devices in terms of their numbers as well as locations is essential to meet the optimum requirement of serviceability, safety, and stability. In this article, FDBS is modelled numerically following standard Friction Damper guideline. The 2D building frames with FDBS at various locations are used to study the responses of multi-storey building frames having different vertical bracing configurations. Locations of the energy dissipation devices are altered for each of the structures to study the effect of load flow through the desired load path. It is intended to isolate the FDBS in such a way so that the operational constraints do not interfere with the monitoring and maintenance of the critical dissipating system, which is the lifeline for the structural stability. Nonlinear time history analysis is performed for each of the frames for a scaled ground motion obtained using Conditional Mean Spectra for the city of Vancouver. Energy dissipation behavior of the structures is compared in order to comprehend the effect of damper arrangement. Load versus deflection behaviour of the structures at different levels indicate that structures with regular configurations show better behaviour in comparison to the customized structures with special configurations. Therefore, it is concluded that FDBS enabled structural systems are suitable as well as necessary for the complicated structures where the horizontal load transfer system is expected to be flexible to meet the process requirements.
© 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.\n
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\n \n\n \n \n \n \n \n \n Distinct element modeling of the dynamic response of a rocking podium tested on a shake table.\n \n \n \n \n\n\n \n Malomo, D.; Mehrotra, A.; and DeJong, M. J.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 50(5): 1469 - 1475. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"DistinctPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20205009622631 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Distinct element modeling of the dynamic response of a rocking podium tested on a shake table},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Malomo, Daniele and Mehrotra, Anjali and DeJong, Matthew J.},\nvolume = {50},\nnumber = {5},\nyear = {2021},\npages = {1469 - 1475},\nissn = {00988847},\nabstract = {A blind prediction contest was organized to evaluate the ability of different modeling approaches to simulate the seismic rocking response of a full-scale four-column podium structure. The structure was tested on a shake table, and was subjected to two bidirectional ground motion ensembles comprising 100 synthetic records each. This short communication presents the main assumptions and results from the model, developed using the distinct element method, which provided the second-best prediction of the experimental results. A comparison of the model predictions and the experimental results demonstrates that the numerical model was generally able to reproduce the large displacements induced by the more intense ground motion ensemble, while tending to overestimate the displacements of the less intense earthquake ensemble. This overestimation of the response was reduced through the inclusion of damping in the system. However, the addition of damping greatly increased the solve time, which is problematic for a competition, and in the case of the more intense ground motion ensemble also resulted in an underprediction of the maximum response of the structure.<br/> © 2020 John Wiley & Sons Ltd.},\nkey = {Damping},\n%keywords = {Forecasting;Earthquake effects;},\n%note = {Bi-directional ground motions;Blind predictions;Distinct element methods;Distinct element modeling;Large displacements;Model prediction;Podium structure;Seismic rocking;},\nURL = {http://dx.doi.org/10.1002/eqe.3404},\n} \n\n\n
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\n A blind prediction contest was organized to evaluate the ability of different modeling approaches to simulate the seismic rocking response of a full-scale four-column podium structure. The structure was tested on a shake table, and was subjected to two bidirectional ground motion ensembles comprising 100 synthetic records each. This short communication presents the main assumptions and results from the model, developed using the distinct element method, which provided the second-best prediction of the experimental results. A comparison of the model predictions and the experimental results demonstrates that the numerical model was generally able to reproduce the large displacements induced by the more intense ground motion ensemble, while tending to overestimate the displacements of the less intense earthquake ensemble. This overestimation of the response was reduced through the inclusion of damping in the system. However, the addition of damping greatly increased the solve time, which is problematic for a competition, and in the case of the more intense ground motion ensemble also resulted in an underprediction of the maximum response of the structure.
© 2020 John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Data assimilation of satellite-based terrestrial water storage changes into a hydrology land-surface model.\n \n \n \n \n\n\n \n Bahrami, A.; Goita, K.; Magagi, R.; Davison, B.; Razavi, S.; Elshamy, M.; and Princz, D.\n\n\n \n\n\n\n Journal of Hydrology, 597. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"DataPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204909586286 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Data assimilation of satellite-based terrestrial water storage changes into a hydrology land-surface model},\njournal = {Journal of Hydrology},\nauthor = {Bahrami, Ala and Goita, Kalifa and Magagi, Ramata and Davison, Bruce and Razavi, Saman and Elshamy, Mohamed and Princz, Daniel},\nvolume = {597},\nyear = {2021},\nissn = {00221694},\nabstract = {<div data-language="eng" data-ev-field="abstract">Accurate estimation of snow mass or snow water equivalent (SWE) over space and time is required for global and regional predictions of the effects of climate change. This work investigates whether integration of remotely sensed terrestrial water storage (TWS) information, which is derived from the Gravity Recovery and Climate Experiment (GRACE), can improve SWE and streamflow simulations within a semi-distributed hydrology land surface model. A data assimilation (DA) framework was developed to combine TWS observations with the MESH (Modélisation Environnementale Communautaire – Surface Hydrology) model using an ensemble Kalman smoother (EnKS). The snow-dominated Liard Basin was selected as a case study. The proposed assimilation methodology reduced bias of monthly SWE simulations at the basin scale by 17.5% and improved unbiased root-mean-square difference (ubRMSD) by 23%. At the grid scale, the DA method improved ubRMSD values and correlation coefficients for 85% and 97% of the grid cells, respectively. Effects of GRACE DA on streamflow simulations were evaluated against observations from three river gauges, where it effectively improved the simulation of high flows during snowmelt season from April to June. The influence of GRACE DA on the total flow volume and low flows was found to be variable. In general, the use of GRACE observations in the assimilation framework not only improved the simulation of SWE, but also effectively influenced streamflow simulations.<br/></div> © 2020 Elsevier B.V.},\nkey = {Snow},\n%keywords = {Hydrology;Climate change;Digital storage;Mesh generation;Surface measurement;Climate models;Geodetic satellites;Stream flow;},\n%note = {Correlation coefficient;Gravity recovery and climate experiments;Land surface modeling;Regional predictions;Root mean square differences;Snow water equivalent;Streamflow simulations;Terrestrial water storage;},\nURL = {http://dx.doi.org/10.1016/j.jhydrol.2020.125744},\n} \n\n\n
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Accurate estimation of snow mass or snow water equivalent (SWE) over space and time is required for global and regional predictions of the effects of climate change. This work investigates whether integration of remotely sensed terrestrial water storage (TWS) information, which is derived from the Gravity Recovery and Climate Experiment (GRACE), can improve SWE and streamflow simulations within a semi-distributed hydrology land surface model. A data assimilation (DA) framework was developed to combine TWS observations with the MESH (Modélisation Environnementale Communautaire – Surface Hydrology) model using an ensemble Kalman smoother (EnKS). The snow-dominated Liard Basin was selected as a case study. The proposed assimilation methodology reduced bias of monthly SWE simulations at the basin scale by 17.5% and improved unbiased root-mean-square difference (ubRMSD) by 23%. At the grid scale, the DA method improved ubRMSD values and correlation coefficients for 85% and 97% of the grid cells, respectively. Effects of GRACE DA on streamflow simulations were evaluated against observations from three river gauges, where it effectively improved the simulation of high flows during snowmelt season from April to June. The influence of GRACE DA on the total flow volume and low flows was found to be variable. In general, the use of GRACE observations in the assimilation framework not only improved the simulation of SWE, but also effectively influenced streamflow simulations.
© 2020 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Influence of synthetic fibers on the seismic behavior of reinforced-concrete circular columns.\n \n \n \n \n\n\n \n Rivera, J. E.; Eid, R.; and Paultre, P.\n\n\n \n\n\n\n Engineering Structures, 228. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"InfluencePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20204909583433 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Influence of synthetic fibers on the seismic behavior of reinforced-concrete circular columns},\njournal = {Engineering Structures},\nauthor = {Rivera, Jesus Emilio and Eid, Rami and Paultre, Patrick},\nvolume = {228},\nyear = {2021},\nissn = {01410296},\nabstract = {The addition of discrete fibers to the concrete mixture to enhance its toughness and tensile strength is well acknowledged. Studies have also shown that fiber-reinforced concrete (FRC) can be favorable for its enhanced behavior in compression. This behavior, which is attributed to the confinement action of the fibers, is, in general, superior in terms of strength and ductility, compared to plain concrete. Reversed cyclic loading in flexure under constant axial load of large scale synthetic fiber-reinforced concrete columns is scarce as opposed to steel fiber-reinforced concrete columns. This paper presents an experimental study on the behavior of large-scale synthetic fiber-reinforced concrete columns with hoops transverse steel reinforcement under constant axial load and reversed flexure simulating seismic loading. The results from this study show slightly improved cyclic behavior compared to results obtained on similar columns reinforced with spiral transverse reinforcement. Enhanced behavior of synthetic fiber-reinforced concrete is achieved for practical transverse steel reinforcement spacings (⩾75 mm). In this case, similar ductile behavior of a reinforced-concrete column can be reached with a reduced amount of transverse steel reinforcement and the inclusion of synthetic fibers with an aspect ratio of 50–100 to the concrete mixture. Difficulty in placing synthetic fiber-reinforced concrete in very congested columns precludes its use in columns with hoops or spiral spacing less than 75mm until self leveling concrete with large amount of synthetic fibers is developed.<br/> © 2020 Elsevier Ltd},\nkey = {Energy dissipation},\n%keywords = {Axial loads;Seismic response;Tensile strength;Columns (structural);Concrete construction;Reinforced concrete;Concrete mixtures;Ductility;Steel fibers;Fiber reinforced materials;Mixtures;Aspect ratio;Reinforced plastics;},\n%note = {Ductile behavior;Reinforced concrete column;Reversed cyclic loading;Seismic behavior;Seismic loadings;Strength and ductilities;Transverse reinforcement;Transverse steel;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2020.111493},\n} \n\n\n
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\n The addition of discrete fibers to the concrete mixture to enhance its toughness and tensile strength is well acknowledged. Studies have also shown that fiber-reinforced concrete (FRC) can be favorable for its enhanced behavior in compression. This behavior, which is attributed to the confinement action of the fibers, is, in general, superior in terms of strength and ductility, compared to plain concrete. Reversed cyclic loading in flexure under constant axial load of large scale synthetic fiber-reinforced concrete columns is scarce as opposed to steel fiber-reinforced concrete columns. This paper presents an experimental study on the behavior of large-scale synthetic fiber-reinforced concrete columns with hoops transverse steel reinforcement under constant axial load and reversed flexure simulating seismic loading. The results from this study show slightly improved cyclic behavior compared to results obtained on similar columns reinforced with spiral transverse reinforcement. Enhanced behavior of synthetic fiber-reinforced concrete is achieved for practical transverse steel reinforcement spacings (⩾75 mm). In this case, similar ductile behavior of a reinforced-concrete column can be reached with a reduced amount of transverse steel reinforcement and the inclusion of synthetic fibers with an aspect ratio of 50–100 to the concrete mixture. Difficulty in placing synthetic fiber-reinforced concrete in very congested columns precludes its use in columns with hoops or spiral spacing less than 75mm until self leveling concrete with large amount of synthetic fibers is developed.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Numerical simulation of Rayleigh-Bénard convection and three-phase Rayleigh-Taylor instability using a modified MPS method.\n \n \n \n \n\n\n \n Garoosi, F.; and Shakibaeinia, A.\n\n\n \n\n\n\n Engineering Analysis with Boundary Elements, 123: 1 - 35. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204909567212 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical simulation of Rayleigh-Bénard convection and three-phase Rayleigh-Taylor instability using a modified MPS method},\njournal = {Engineering Analysis with Boundary Elements},\nauthor = {Garoosi, Faroogh and Shakibaeinia, Ahmad},\nvolume = {123},\nyear = {2021},\npages = {1 - 35},\nissn = {09557997},\nabstract = {The main objective of the current work is to enhance consistency and capabilities of Moving Particle Semi-implicit (MPS) method for simulating a wide range of free-surface flows and convection heat transfer. For this purpose, two novel high-order gradient and Laplacian operators are derived from the Taylor series expansion and are applied for the discretization of governing equations. Furthermore, the combination of the explicit Third-order TVD Runge-Kutta scheme and two-step projection algorithm is employed to approximate transient terms in the Navier-stokes and energy equations. To further improve the accuracy and performance of the method, a new kernel function is constructed by a combination of the Gaussian and cosine functions and then implemented for modeling the 1D Sod shock tube problem. Validation and verification of the proposed model are conducted through the simulations of several canonical test cases such as: dam break, rotation of a square patch of fluid, two-phase Rayleigh-Taylor instability, oscillating concentric circular drop and good agreement are achieved. The proposed model is then employed to simulate three-phase Rayleigh-Taylor instability and entropy generation due to natural convection heat transfer (Differentially Heated Cavity and Rayleigh-Bénard convection). The obtained results reveal that, the newly constructed kernel function provides more reliable results in comparison with two frequently used kernel functions namely; quartic spline and Wendland. Furthermore, it is found that, the enhanced MPS model is capable of handling multiphase flow problems with low and high density contrast.<br/> © 2020},\nkey = {Natural convection},\n%keywords = {Cosine transforms;Runge Kutta methods;Shock tubes;Numerical methods;Rayleigh scattering;Entropy;Taylor series;Laplace transforms;Mathematical operators;Navier Stokes equations;},\n%note = {Differentially heated cavity;Governing equations;Moving particle semiimplicit method;Projection algorithms;Rayleigh-Taylor instabilities;Runge-kutta schemes;Taylor series expansions;Validation and verification;},\nURL = {http://dx.doi.org/10.1016/j.enganabound.2020.11.012},\n} \n\n\n
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\n The main objective of the current work is to enhance consistency and capabilities of Moving Particle Semi-implicit (MPS) method for simulating a wide range of free-surface flows and convection heat transfer. For this purpose, two novel high-order gradient and Laplacian operators are derived from the Taylor series expansion and are applied for the discretization of governing equations. Furthermore, the combination of the explicit Third-order TVD Runge-Kutta scheme and two-step projection algorithm is employed to approximate transient terms in the Navier-stokes and energy equations. To further improve the accuracy and performance of the method, a new kernel function is constructed by a combination of the Gaussian and cosine functions and then implemented for modeling the 1D Sod shock tube problem. Validation and verification of the proposed model are conducted through the simulations of several canonical test cases such as: dam break, rotation of a square patch of fluid, two-phase Rayleigh-Taylor instability, oscillating concentric circular drop and good agreement are achieved. The proposed model is then employed to simulate three-phase Rayleigh-Taylor instability and entropy generation due to natural convection heat transfer (Differentially Heated Cavity and Rayleigh-Bénard convection). The obtained results reveal that, the newly constructed kernel function provides more reliable results in comparison with two frequently used kernel functions namely; quartic spline and Wendland. Furthermore, it is found that, the enhanced MPS model is capable of handling multiphase flow problems with low and high density contrast.
© 2020\n
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\n \n\n \n \n \n \n \n \n Review of air-based PV/T and BIPV/T systems - Performance and modelling.\n \n \n \n \n\n\n \n Rounis, E. D.; Athienitis, A.; and Stathopoulos, T.\n\n\n \n\n\n\n Renewable Energy, 163: 1729 - 1753. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ReviewPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204809538690 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Review of air-based PV/T and BIPV/T systems - Performance and modelling},\njournal = {Renewable Energy},\nauthor = {Rounis, Efstratios Dimitrios and Athienitis, Andreas and Stathopoulos, Theodore},\nvolume = {163},\nyear = {2021},\npages = {1729 - 1753},\nissn = {09601481},\nabstract = {This article presents a review of the monitored performance of air-based photovoltaic/thermal (PV/T) and building integrated photovoltaic/thermal (BIPV/T) systems, as well as the relevant system modelling with focus on the convective phenomena. The review showed that the majority of experimental studies involve small-scale PV/T prototypes of the stand-alone format, usually tested under conditions that are not representative of full-scale BIPV/T systems, while the cases of instrumented full-scale BIPV/T systems are very few. The varying testing conditions render a direct performance comparison of the various systems difficult, while the convective phenomena may exhibit significantly different behavior depending on the system type and size. Additionally, different expressions used to model wind-driven and channel convection may introduce significant uncertainty in the predicted performance of such systems. These inconsistencies in both the monitored and modelled performance contribute to a reduced confidence in such systems and a resulting small number of realized applications. The purpose of this review is to identify the relevant research needs pertinent to PV/T and BIPV/T testing and modelling, and in doing so provide a framework that can set the foundation for standardized testing, as well as modelling at different design stages.<br/> © 2020},\nkey = {Well testing},\n%keywords = {Wind effects;},\n%note = {Building integrated photovoltaic;Performance comparison;Photovoltaic/thermal;Predicted performance;Standardized testing;System modelling;Systems performance;Testing conditions;},\nURL = {http://dx.doi.org/10.1016/j.renene.2020.10.085},\n} \n\n\n
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\n This article presents a review of the monitored performance of air-based photovoltaic/thermal (PV/T) and building integrated photovoltaic/thermal (BIPV/T) systems, as well as the relevant system modelling with focus on the convective phenomena. The review showed that the majority of experimental studies involve small-scale PV/T prototypes of the stand-alone format, usually tested under conditions that are not representative of full-scale BIPV/T systems, while the cases of instrumented full-scale BIPV/T systems are very few. The varying testing conditions render a direct performance comparison of the various systems difficult, while the convective phenomena may exhibit significantly different behavior depending on the system type and size. Additionally, different expressions used to model wind-driven and channel convection may introduce significant uncertainty in the predicted performance of such systems. These inconsistencies in both the monitored and modelled performance contribute to a reduced confidence in such systems and a resulting small number of realized applications. The purpose of this review is to identify the relevant research needs pertinent to PV/T and BIPV/T testing and modelling, and in doing so provide a framework that can set the foundation for standardized testing, as well as modelling at different design stages.
© 2020\n
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\n \n\n \n \n \n \n \n \n Settlement Rate Increase in Organic Soils following Cyclic Loading.\n \n \n \n \n\n\n \n Lemnitzer, A.; Yniesta, S.; Cappa, R.; and Brandenberg, S.\n\n\n \n\n\n\n Journal of Geotechnical and Geoenvironmental Engineering, 147(2). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"SettlementPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204809530382 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Settlement Rate Increase in Organic Soils following Cyclic Loading},\njournal = {Journal of Geotechnical and Geoenvironmental Engineering},\nauthor = {Lemnitzer, A. and Yniesta, S. and Cappa, R. and Brandenberg, S.J.},\nvolume = {147},\nnumber = {2},\nyear = {2021},\nissn = {10900241},\nabstract = {Postshaking settlements observed during centrifuge tests of model levees resting atop soft compressible peat are compared with numerical settlement solutions. Two large-scale (9 m) tests and one small-scale (1 m) test are analyzed. The models included extensive instrumentation consisting of pore pressure sensors, accelerometers, bender elements, and displacement transducers to measure levee response during and after the application of scaled ground motions at the container base. Postcyclic settlement records suggested an increase in settlement rates within peat on cyclic loading compared with preseismic settlements due to the combined effects of excess pore pressure generation and secondary compression. The observed settlements were compared with the predictions of a one-dimensional nonlinear consolidation code that follows an implicit finite difference formulation. The code includes nonlinear compressibility and permeability properties and models secondary compression strain rate as a function of soil state rather than of time. Secondary compression was found to be the largest contributor to levee settlement. Further, cyclic straining was found to increase the secondary compression rate after earthquake shaking. Incorporating secondary compression reset into settlement predictions resulted in close agreement with measurements, whereas failing to consider secondary compression reset resulted in substantial underprediction of experimental settlement records.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Embankments},\n%keywords = {Codes (symbols);Soil testing;Soils;Strain rate;Geotechnical engineering;Transducers;Pore pressure;Peat;Cyclic loads;Consolidation;},\n%note = {Centrifuge tests;Displacement transducer;Earthquake shaking;Excess pore pressure;One dimensional nonlinear consolidation;Permeability properties;Secondary compression;Settlement prediction;},\nURL = {http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.0002432},\n} \n\n\n
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\n Postshaking settlements observed during centrifuge tests of model levees resting atop soft compressible peat are compared with numerical settlement solutions. Two large-scale (9 m) tests and one small-scale (1 m) test are analyzed. The models included extensive instrumentation consisting of pore pressure sensors, accelerometers, bender elements, and displacement transducers to measure levee response during and after the application of scaled ground motions at the container base. Postcyclic settlement records suggested an increase in settlement rates within peat on cyclic loading compared with preseismic settlements due to the combined effects of excess pore pressure generation and secondary compression. The observed settlements were compared with the predictions of a one-dimensional nonlinear consolidation code that follows an implicit finite difference formulation. The code includes nonlinear compressibility and permeability properties and models secondary compression strain rate as a function of soil state rather than of time. Secondary compression was found to be the largest contributor to levee settlement. Further, cyclic straining was found to increase the secondary compression rate after earthquake shaking. Incorporating secondary compression reset into settlement predictions resulted in close agreement with measurements, whereas failing to consider secondary compression reset resulted in substantial underprediction of experimental settlement records.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Bayesian procedures for updating deterioration space-time models for optimizing the utility of concrete structures.\n \n \n \n \n\n\n \n Zhang, Y.; Chouinard, L. E.; Conciatori, D.; and Power, G. J.\n\n\n \n\n\n\n Engineering Structures, 228. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"BayesianPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20204809539969 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Bayesian procedures for updating deterioration space-time models for optimizing the utility of concrete structures},\njournal = {Engineering Structures},\nauthor = {Zhang, Yan and Chouinard, Luc E. and Conciatori, David and Power, Gabriel J.},\nvolume = {228},\nyear = {2021},\nissn = {01410296},\nabstract = {The dominant mode of deterioration of concrete bridge structures in North America is corrosion associated with the ingress of chloride ions from salt spreading. Finite element and finite difference models can be utilized to predict the chloride ion content as a function of space and time in concrete and to estimate the time to the corrosion initiation of the reinforcing steel. The input parameters to these models include environmental exposure data, salt spreading protocols and concrete properties. Data on environmental exposure and salt spreading protocols can be obtained from meteorological stations and roadway operators respectively such that the remaining uncertainties are mainly related to concrete properties. Prior distributions on concrete diffusion properties can be specified using compiled databases of experimental data and probabilistic methods are used to propagate uncertainties to derive the prior distribution of chloride ion content as a function of depth and time. When chloride content are available from core samples, Bayesian updating procedures are proposed to update the probability distribution functions of concrete properties considering the type of exposure, the chloride ion profile and time of sampling. The proposed procedure can be applied for any number of core samples sampled at different times and accounts for correlations between chloride content predictions at different times and depths. The proposed procedure is demonstrated for an existing bridge located in Montreal, Canada.<br/> © 2020 Elsevier Ltd},\nkey = {Deterioration},\n%keywords = {Chlorine compounds;Concretes;Ions;Sampling;Steel corrosion;Concrete bridges;Distribution functions;},\n%note = {Bayesian updating procedures;Concrete bridge structures;Corrosion initiation;Diffusion properties;Environmental exposure;Finite difference model;Meteorological station;Probabilistic methods;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2020.111522},\n} \n\n\n
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\n The dominant mode of deterioration of concrete bridge structures in North America is corrosion associated with the ingress of chloride ions from salt spreading. Finite element and finite difference models can be utilized to predict the chloride ion content as a function of space and time in concrete and to estimate the time to the corrosion initiation of the reinforcing steel. The input parameters to these models include environmental exposure data, salt spreading protocols and concrete properties. Data on environmental exposure and salt spreading protocols can be obtained from meteorological stations and roadway operators respectively such that the remaining uncertainties are mainly related to concrete properties. Prior distributions on concrete diffusion properties can be specified using compiled databases of experimental data and probabilistic methods are used to propagate uncertainties to derive the prior distribution of chloride ion content as a function of depth and time. When chloride content are available from core samples, Bayesian updating procedures are proposed to update the probability distribution functions of concrete properties considering the type of exposure, the chloride ion profile and time of sampling. The proposed procedure can be applied for any number of core samples sampled at different times and accounts for correlations between chloride content predictions at different times and depths. The proposed procedure is demonstrated for an existing bridge located in Montreal, Canada.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Closure to \"use of Rigid Geofoam Insulation to Mitigate Frost Heave at Shallow Culvert Installations\" by Ahmed Moussa, Ahmed Shalaby, Leonnie Kavanagh, and Pooneh Maghoul.\n \n \n \n \n\n\n \n Moussa, A.; Shalaby, A.; Kavanagh, L.; and Maghoul, P.\n\n\n \n\n\n\n Journal of Cold Regions Engineering, 35(1). 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ClosurePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20204609492899 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Closure to "use of Rigid Geofoam Insulation to Mitigate Frost Heave at Shallow Culvert Installations" by Ahmed Moussa, Ahmed Shalaby, Leonnie Kavanagh, and Pooneh Maghoul},\njournal = {Journal of Cold Regions Engineering},\nauthor = {Moussa, Ahmed and Shalaby, Ahmed and Kavanagh, Leonnie and Maghoul, Pooneh},\nvolume = {35},\nnumber = {1},\nyear = {2021},\nissn = {0887381X},\nURL = {http://dx.doi.org/10.1061/(ASCE)CR.1943-5495.0000237},\n} \n\n\n
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\n \n\n \n \n \n \n \n \n Stress-Strain Behaviour of Masonry Prisms Constructed with Glass Fibre-Reinforced Grout.\n \n \n \n \n\n\n \n Gouda, O.; Hassanein, A.; Youssef, T.; and Galal, K.\n\n\n \n\n\n\n Construction and Building Materials, 267. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"Stress-StrainPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20204609490354 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Stress-Strain Behaviour of Masonry Prisms Constructed with Glass Fibre-Reinforced Grout},\njournal = {Construction and Building Materials},\nauthor = {Gouda, Omar and Hassanein, Ahmed and Youssef, Tarik and Galal, Khaled},\nvolume = {267},\nyear = {2021},\nissn = {09500618},\nabstract = {The overall compressive behaviour of grouted concrete hollow block prisms is dependent on the mechanical properties of both the masonry block and its grout. Grout is typically characterized by exhibiting greater longitudinal and lateral strains when compared to concrete blocks. Hence, a direct consequence is a composite-action incompatibility due to grout-to-block differential strain response under compressive loading. In order to enhance the overall composite behaviour, adding glass fibres to the grout mixture is considered in this study. The fibre-reinforced grout is expected to reduce grout longitudinal and lateral strains to be more consistent with the concrete block, which will result in better control of the cracking propagation and thus enhancing the overall ductility. This study investigates the effect of adding glass fibres to grout mix on the compressive strength and strain of the concrete masonry prisms. The presented experimental program involves testing of 36 fully grouted half-scale masonry prisms, with different glass fibre ratios (0%, 0.03%, 0.06%, and 0.10%). Twenty-four prisms were of one block thickness and two blocks in height, divided into two groups of normal and high strength blocks. The remaining twelve prisms were two blocks in thickness and five blocks in height with normal strength blocks. The prisms were tested concentrically up to failure. Results demonstrated that the addition of glass fibres to the grout enhanced the crack control as well as the post-cracking performance. The influence of adding glass fibres to the grout on increasing the masonry prisms' compressive strength was evident at high fibre percentage (i.e., 0.10%) by approximately 9.8%, 10.1 %, and 39% for the high strength two-block high specimens, normal strength two-block high specimens, and normal strength five-block high specimens, respectively.<br/> © 2020 Elsevier Ltd},\nkey = {Compressive strength},\n%keywords = {Glass fibers;Strain;Concrete testing;Grouting;Mortar;Prisms;Cracks;Concrete construction;Ductility;Reinforcement;Software testing;},\n%note = {Block differentials;Composite behaviour;Compressive loading;Concrete masonry prisms;Cracking performance;Experimental program;Glass fibre reinforced;Stress strain behaviours;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2020.120984},\n} \n\n\n
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\n The overall compressive behaviour of grouted concrete hollow block prisms is dependent on the mechanical properties of both the masonry block and its grout. Grout is typically characterized by exhibiting greater longitudinal and lateral strains when compared to concrete blocks. Hence, a direct consequence is a composite-action incompatibility due to grout-to-block differential strain response under compressive loading. In order to enhance the overall composite behaviour, adding glass fibres to the grout mixture is considered in this study. The fibre-reinforced grout is expected to reduce grout longitudinal and lateral strains to be more consistent with the concrete block, which will result in better control of the cracking propagation and thus enhancing the overall ductility. This study investigates the effect of adding glass fibres to grout mix on the compressive strength and strain of the concrete masonry prisms. The presented experimental program involves testing of 36 fully grouted half-scale masonry prisms, with different glass fibre ratios (0%, 0.03%, 0.06%, and 0.10%). Twenty-four prisms were of one block thickness and two blocks in height, divided into two groups of normal and high strength blocks. The remaining twelve prisms were two blocks in thickness and five blocks in height with normal strength blocks. The prisms were tested concentrically up to failure. Results demonstrated that the addition of glass fibres to the grout enhanced the crack control as well as the post-cracking performance. The influence of adding glass fibres to the grout on increasing the masonry prisms' compressive strength was evident at high fibre percentage (i.e., 0.10%) by approximately 9.8%, 10.1 %, and 39% for the high strength two-block high specimens, normal strength two-block high specimens, and normal strength five-block high specimens, respectively.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n A Macro-Distinct Element Model (M-DEM) for simulating the in-plane cyclic behavior of URM structures.\n \n \n \n \n\n\n \n Malomo, D.; and DeJong, M. J.\n\n\n \n\n\n\n Engineering Structures, 227. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20204509448962 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Macro-Distinct Element Model (M-DEM) for simulating the in-plane cyclic behavior of URM structures},\njournal = {Engineering Structures},\nauthor = {Malomo, Daniele and DeJong, Matthew J.},\nvolume = {227},\nyear = {2021},\nissn = {01410296},\nabstract = {In this work, a new Macro-Distinct Element Model (M-DEM) for the analysis of the in-plane behavior of unreinforced masonry (URM) structures, aimed at combining the efficiency of simplified approaches with the accuracy of discontinuum-based micro-modeling methods, is presented and validated through comparison against a number of both experimental and numerical tests on URM components. In the M-DEM framework, Finite Element (FE) homogenized macro-blocks are connected by discrete spring interfaces, whose layout is determined a priori as a function of the masonry texture. In-plane diagonal and sliding shear failure mechanisms, as well as flexural damage, are accounted for by the discrete spring interfaces. Meanwhile, a new methodology to simulate crushing, which makes use of a strain-softening model originally conceived for modeling concrete failure, is proposed and calibrated against small-scale tests on masonry samples. The strategy is to simulate shear/tension failure in the block interfaces and compression failure within the FE macro-blocks, while discretizing to allow the possibility of simulating out-of-plane failure modes. Using the M-DEM, the observed experimental damage and the hysteretic behavior of various reduced-scale URM specimens, subjected to shear-compression cyclic loading, were satisfactorily reproduced numerically. The capabilities of the M-DEM to predict the influence of the bond pattern on the monotonic behavior laterally-loaded URM piers were also scrutinized through comparison with standard micro-modeling outcomes, focusing on potential differences concerning both accuracy and computational expense. Finally, given the encouraging results obtained, the proposed approach was extended to the simulation of the in-plane cyclic response of a full-scale URM façade. Although the model marginally underestimated the energy dissipation in the first test phases, a good agreement was obtained in terms of peak and residual base shear capacity, initial in-plane stiffness and its progressive deterioration, governing failure mechanisms and final crack pattern, whilst simultaneously keeping computational costs within acceptable limits.<br/> © 2020 Elsevier Ltd},\nkey = {Deterioration},\n%keywords = {Textures;Failure (mechanical);Stiffness;Energy dissipation;Hysteresis;Masonry materials;Numerical methods;},\n%note = {Computational expense;Distinct element modeling;Experimental damage;Hysteretic behavior;Out-of-plane failures;Shear failure mechanisms;Strain-softening models;Unreinforced masonry;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2020.111428},\n} \n\n\n
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\n In this work, a new Macro-Distinct Element Model (M-DEM) for the analysis of the in-plane behavior of unreinforced masonry (URM) structures, aimed at combining the efficiency of simplified approaches with the accuracy of discontinuum-based micro-modeling methods, is presented and validated through comparison against a number of both experimental and numerical tests on URM components. In the M-DEM framework, Finite Element (FE) homogenized macro-blocks are connected by discrete spring interfaces, whose layout is determined a priori as a function of the masonry texture. In-plane diagonal and sliding shear failure mechanisms, as well as flexural damage, are accounted for by the discrete spring interfaces. Meanwhile, a new methodology to simulate crushing, which makes use of a strain-softening model originally conceived for modeling concrete failure, is proposed and calibrated against small-scale tests on masonry samples. The strategy is to simulate shear/tension failure in the block interfaces and compression failure within the FE macro-blocks, while discretizing to allow the possibility of simulating out-of-plane failure modes. Using the M-DEM, the observed experimental damage and the hysteretic behavior of various reduced-scale URM specimens, subjected to shear-compression cyclic loading, were satisfactorily reproduced numerically. The capabilities of the M-DEM to predict the influence of the bond pattern on the monotonic behavior laterally-loaded URM piers were also scrutinized through comparison with standard micro-modeling outcomes, focusing on potential differences concerning both accuracy and computational expense. Finally, given the encouraging results obtained, the proposed approach was extended to the simulation of the in-plane cyclic response of a full-scale URM façade. Although the model marginally underestimated the energy dissipation in the first test phases, a good agreement was obtained in terms of peak and residual base shear capacity, initial in-plane stiffness and its progressive deterioration, governing failure mechanisms and final crack pattern, whilst simultaneously keeping computational costs within acceptable limits.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Impact of ground floor openings percentage on the dynamic response of typical Dutch URM cavity wall structures.\n \n \n \n \n\n\n \n Malomo, D.; Morandini, C.; Crowley, H.; Pinho, R.; and Penna, A.\n\n\n \n\n\n\n Bulletin of Earthquake Engineering, 19(1): 403 - 428. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20204509447692 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact of ground floor openings percentage on the dynamic response of typical Dutch URM cavity wall structures},\njournal = {Bulletin of Earthquake Engineering},\nauthor = {Malomo, D. and Morandini, C. and Crowley, H. and Pinho, R. and Penna, A.},\nvolume = {19},\nnumber = {1},\nyear = {2021},\npages = {403 - 428},\nissn = {1570761X},\nabstract = {Unreinforced masonry (URM) buildings with cavity walls, typically constituted by the assembly of a loadbearing inner leaf weakly coupled to an outer veneer with no structural functions, are widely present in a number of regions exposed to tectonic or induced seismicity, including the Groningen province (The Netherlands), which has lately experienced low-intensity ground shaking due to natural gas extraction. Recently, experimental evidence has shown that the lack of seismic details, and, above all, the presence of large ground floor openings, makes these structures particularly vulnerable towards horizontal actions. In this endeavour, advanced discrete element models, developed within the framework of the Applied Element Method (AEM), are employed to investigate numerically the impact of ground floor openings percentage on the dynamic behaviour of cavity wall systems representative of the typical Dutch terraced houses construction, namely low-rise residential URM buildings with rigid floor diaphragms and timber roof. Firstly, the model is validated through comparison with a shake-table test of a full-scale building specimen, tested up to near-collapse. Then, a comprehensive numerical study, which featured several combinations of ground-floor openings and the application of various acceleration time-histories up to complete collapse, is undertaken. The ensuing results allowed a comparison of the fragility associated with each of the considered openings layouts, showing how the presence of large ground floor openings may significantly increase the seismic vulnerability of typical URM Dutch terraced houses.<br/> © 2020, Springer Nature B.V.},\nkey = {Dynamic response},\n%keywords = {Floors;Roofs;Seismology;Walls (structural partitions);Masonry materials;},\n%note = {Acceleration-time history;Cavity wall systems;Discrete element models;Experimental evidence;Natural gas extraction;Seismic vulnerability;Structural function;Unreinforced masonry;},\nURL = {http://dx.doi.org/10.1007/s10518-020-00976-z},\n} \n\n\n
\n
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\n Unreinforced masonry (URM) buildings with cavity walls, typically constituted by the assembly of a loadbearing inner leaf weakly coupled to an outer veneer with no structural functions, are widely present in a number of regions exposed to tectonic or induced seismicity, including the Groningen province (The Netherlands), which has lately experienced low-intensity ground shaking due to natural gas extraction. Recently, experimental evidence has shown that the lack of seismic details, and, above all, the presence of large ground floor openings, makes these structures particularly vulnerable towards horizontal actions. In this endeavour, advanced discrete element models, developed within the framework of the Applied Element Method (AEM), are employed to investigate numerically the impact of ground floor openings percentage on the dynamic behaviour of cavity wall systems representative of the typical Dutch terraced houses construction, namely low-rise residential URM buildings with rigid floor diaphragms and timber roof. Firstly, the model is validated through comparison with a shake-table test of a full-scale building specimen, tested up to near-collapse. Then, a comprehensive numerical study, which featured several combinations of ground-floor openings and the application of various acceleration time-histories up to complete collapse, is undertaken. The ensuing results allowed a comparison of the fragility associated with each of the considered openings layouts, showing how the presence of large ground floor openings may significantly increase the seismic vulnerability of typical URM Dutch terraced houses.
© 2020, Springer Nature B.V.\n
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\n \n\n \n \n \n \n \n \n Response of concrete columns reinforced with longitudinal and transverse BFRP bars under concentric and eccentric loading.\n \n \n \n \n\n\n \n ElMessalami, N.; Abed, F.; and El Refai, A.\n\n\n \n\n\n\n Composite Structures, 255. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"ResponsePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20204109337349 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Response of concrete columns reinforced with longitudinal and transverse BFRP bars under concentric and eccentric loading},\njournal = {Composite Structures},\nauthor = {ElMessalami, Nouran and Abed, Farid and El Refai, Ahmed},\nvolume = {255},\nyear = {2021},\nissn = {02638223},\nabstract = {This study investigates the behaviour of concrete columns reinforced with longitudinal and transverse basalt fiber-reinforced polymer (BFRP) bars, the most recent of FRP composites. Twelve full-scale concrete columns reinforced with longitudinal BFRP bars and either steel or BFRP ties were tested under both concentric and eccentric loadings. The investigated parameters included the type and spacing of the transverse reinforcement (BFRP and steel ties) and the load eccentricity-to-width ratio (e/h = 0, 22.2%, 44.4%). The test results showed that reducing the spacing of the BFRP ties improved the ductility and confinement efficiency of the BFRP-reinforced concrete (BFRP-RC) columns. However, reducing the ties spacing had an insignificant effect on both the load-carrying capacities of the columns and the contribution of the longitudinal bars to their ultimate capacities. Moreover, BFRP-RC columns confined with BFRP ties exhibited ultimate capacities, bar strength contribution, and confinement efficiency comparable with their counterpart columns confined with steel ties at the same spacing. This study displayed that the current code provisions of CSA-S806-R17 and ACI440.1R-15 for FRP transverse reinforcement can ensure adequate confinement of the concrete core for BFRP-RC columns.<br/> © 2020 Elsevier Ltd},\nkey = {Efficiency},\n%keywords = {Columns (structural);Concrete construction;Fiber reinforced plastics;Reinforced concrete;},\n%note = {Concrete column;Concrete core;Current codes;Eccentric loading;Load eccentricity;Longitudinal bars;Transverse reinforcement;Ultimate capacity;},\nURL = {http://dx.doi.org/10.1016/j.compstruct.2020.113057},\n} \n\n\n
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\n This study investigates the behaviour of concrete columns reinforced with longitudinal and transverse basalt fiber-reinforced polymer (BFRP) bars, the most recent of FRP composites. Twelve full-scale concrete columns reinforced with longitudinal BFRP bars and either steel or BFRP ties were tested under both concentric and eccentric loadings. The investigated parameters included the type and spacing of the transverse reinforcement (BFRP and steel ties) and the load eccentricity-to-width ratio (e/h = 0, 22.2%, 44.4%). The test results showed that reducing the spacing of the BFRP ties improved the ductility and confinement efficiency of the BFRP-reinforced concrete (BFRP-RC) columns. However, reducing the ties spacing had an insignificant effect on both the load-carrying capacities of the columns and the contribution of the longitudinal bars to their ultimate capacities. Moreover, BFRP-RC columns confined with BFRP ties exhibited ultimate capacities, bar strength contribution, and confinement efficiency comparable with their counterpart columns confined with steel ties at the same spacing. This study displayed that the current code provisions of CSA-S806-R17 and ACI440.1R-15 for FRP transverse reinforcement can ensure adequate confinement of the concrete core for BFRP-RC columns.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Circular and square columns strengthened with FRCM under concentric load.\n \n \n \n \n\n\n \n Tello, N.; Alhoubi, Y.; Abed, F.; El Refai, A.; and El-Maaddawy, T.\n\n\n \n\n\n\n Composite Structures, 255. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"CircularPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204109312833 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Circular and square columns strengthened with FRCM under concentric load},\njournal = {Composite Structures},\nauthor = {Tello, Noor and Alhoubi, Yazan and Abed, Farid and El Refai, Ahmed and El-Maaddawy, Tamer},\nvolume = {255},\nyear = {2021},\nissn = {02638223},\nabstract = {Fiber-reinforced cementitious matrix (FRCM) systems have recently emerged as an innovative technique to strengthen and retrofit reinforced concrete structures. These non-corrosive systems involve the use of high strength reinforcing textiles sandwiched between layers of cementitious mortars. This paper aims to study the effect of retrofitting newly constructed short columns with FRCM using PBO type of textiles. The experimental program consisted of testing 4 rectangular columns and 4 circular columns under concentric loading. All columns had a reinforcement ratio of 0.02 and were cast with concrete of 30 MPa compressive strength. For each type of cross-section, columns were wrapped with 1, 2 or 4 layers of PBO FRCM. Overall, the strengthened columns exhibited higher load carrying capacity than their control unwrapped counterpart with an increase ranged between 5.1% and 36%. The confining effect of FRCM layers was more pronounced in the circular columns than in the square ones. It was also noticed that all columns exhibited similar responses in terms of load -strain relationship irrespective of the column shape and the number of FRCM layers used. Furthermore, the displacement levels increased as the number of layers increased which indicated an increase in ductility of columns wrapped with FRCM.<br/> © 2020 Elsevier Ltd},\nkey = {Ductility},\n%keywords = {Concrete construction;Software testing;Retrofitting;Reinforced concrete;Textiles;Concrete testing;Columns (structural);Compressive strength;},\n%note = {Cementitious matrices;Cementitious mortars;Circular columns;Concentric loading;Experimental program;Innovative techniques;Number of layers;Reinforcement ratios;},\nURL = {http://dx.doi.org/10.1016/j.compstruct.2020.113000},\n} \n\n\n
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\n Fiber-reinforced cementitious matrix (FRCM) systems have recently emerged as an innovative technique to strengthen and retrofit reinforced concrete structures. These non-corrosive systems involve the use of high strength reinforcing textiles sandwiched between layers of cementitious mortars. This paper aims to study the effect of retrofitting newly constructed short columns with FRCM using PBO type of textiles. The experimental program consisted of testing 4 rectangular columns and 4 circular columns under concentric loading. All columns had a reinforcement ratio of 0.02 and were cast with concrete of 30 MPa compressive strength. For each type of cross-section, columns were wrapped with 1, 2 or 4 layers of PBO FRCM. Overall, the strengthened columns exhibited higher load carrying capacity than their control unwrapped counterpart with an increase ranged between 5.1% and 36%. The confining effect of FRCM layers was more pronounced in the circular columns than in the square ones. It was also noticed that all columns exhibited similar responses in terms of load -strain relationship irrespective of the column shape and the number of FRCM layers used. Furthermore, the displacement levels increased as the number of layers increased which indicated an increase in ductility of columns wrapped with FRCM.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Hydromechanical couplings of reinforced tensioned members of steel fiber reinforced concrete by dual lattice model.\n \n \n \n \n\n\n \n Pham, D. T.; Sorelli, L.; Fafard, M.; and Vu, M.\n\n\n \n\n\n\n International Journal for Numerical and Analytical Methods in Geomechanics, 45(2): 191 - 207. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"HydromechanicalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20204009257429 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Hydromechanical couplings of reinforced tensioned members of steel fiber reinforced concrete by dual lattice model},\njournal = {International Journal for Numerical and Analytical Methods in Geomechanics},\nauthor = {Pham, Duc Tho and Sorelli, Luca and Fafard, Mario and Vu, Minh-Ngoc},\nvolume = {45},\nnumber = {2},\nyear = {2021},\npages = {191 - 207},\nissn = {03639061},\nabstract = {The durability of concrete structures strongly depends on the water and chloride penetration in cracked concrete during its service life. This work aims at modeling the damage effect of tension stiffening behavior on the permeability for concrete tie specimen under tensile load by a dual lattice model, which considers hydromechanical couplings. Three concrete materials, including normal strength concrete (NSC), steel fiber reinforced concretes (SFRC), and ultra high-performance fiber reinforced concrete (UHPFRC), are considered. The hydromechanical lattice model is based on a dual element network modeling: the water transport and the mechanical response. The fiber bridging effect is considered by means of the cohesive law of Mazars. The water flow in the damaged conduit elements is proportional to the cube of the crack width, which results from the damage variable. Experimental results available in open literature for both NSC and SFRC tie specimens are used to analyze and validate the proposed model. Considering a UHPFRC tie specimen, the model well predicted the load drops due to macrocrack occurrence, load hardening, and permeability evolution. Based on the present results, the current lattice hydromechanical model is a useful tool for predicting the service life of steel bar reinforcing concrete structure with and without steel fiber reinforcement.<br/> © 2020 John Wiley & Sons Ltd.},\nkey = {Chlorine compounds},\n%keywords = {Couplings;Fiber reinforced materials;Reinforced concrete;Concrete construction;Cracks;Concrete buildings;High performance concrete;Steel fibers;},\n%note = {Chloride penetration;Durability of concrete structure;Hydro-mechanical modeling;Hydromechanical coupling;Normal strength concretes;Permeability evolution;Tension-stiffening behavior;Ultra-high-performance fiber-reinforced concrete;},\nURL = {http://dx.doi.org/10.1002/nag.3148},\n} \n\n\n
\n
\n\n\n
\n The durability of concrete structures strongly depends on the water and chloride penetration in cracked concrete during its service life. This work aims at modeling the damage effect of tension stiffening behavior on the permeability for concrete tie specimen under tensile load by a dual lattice model, which considers hydromechanical couplings. Three concrete materials, including normal strength concrete (NSC), steel fiber reinforced concretes (SFRC), and ultra high-performance fiber reinforced concrete (UHPFRC), are considered. The hydromechanical lattice model is based on a dual element network modeling: the water transport and the mechanical response. The fiber bridging effect is considered by means of the cohesive law of Mazars. The water flow in the damaged conduit elements is proportional to the cube of the crack width, which results from the damage variable. Experimental results available in open literature for both NSC and SFRC tie specimens are used to analyze and validate the proposed model. Considering a UHPFRC tie specimen, the model well predicted the load drops due to macrocrack occurrence, load hardening, and permeability evolution. Based on the present results, the current lattice hydromechanical model is a useful tool for predicting the service life of steel bar reinforcing concrete structure with and without steel fiber reinforcement.
© 2020 John Wiley & Sons Ltd.\n
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\n \n\n \n \n \n \n \n \n Dynamic disintegration processes accompanying transport of an earthquake-induced landslide.\n \n \n \n \n\n\n \n Gao, G.; Meguid, M. A.; Chouinard, L. E.; and Zhan, W.\n\n\n \n\n\n\n Landslides, 18(3): 909 - 933. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"DynamicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20203509115930 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Dynamic disintegration processes accompanying transport of an earthquake-induced landslide},\njournal = {Landslides},\nauthor = {Gao, Ge and Meguid, Mohamed A. and Chouinard, Luc E. and Zhan, Weiwei},\nvolume = {18},\nnumber = {3},\nyear = {2021},\npages = {909 - 933},\nissn = {1612510X},\nabstract = {Aiming to understand the dynamic disintegration and transport behavior of an earthquake-induced landslide, a dynamic discrete element method has been employed to analyze the Wangjiayan landslide triggered by the 2008 Ms 8.0 Wenchuan earthquake. Absorbing boundary condition is used for the seismic wave transmission and reflection at the slope base. The numerical results show that under seismic loading, internal rock damage initiates, propagates, and coalesces progressively along the weak solid structure and subsequently leads to fragmentation and pulverization of the slope mass. This can be quantitatively interpreted with the continuously rapid increase of the damage ratio and sudden decline of growth ratio of the number of fragments after the peak seismic shaking. During emplacement evolution, fragmented deformation patterns within the translating joint-defined granular assemblies are affected by the locally high dilatancy with a simultaneous occurrence of highly energetic collisions related to the action of shearing, and this can be quantified by the enhancement of particle kinematic activities (high vibrational and rotational granular temperatures) and intense fluctuations of location-dependent global dispersive stress. In this process, slope destabilized and transports downward in a rapid pulsing motion as friction bonds are locally and continually overcome by the seismic- and gravity-induced shear forces. The joint-determined fragment network before movement initiation and the final fragmented depositions after the rapidly sheared transport have been systematically investigated by fragment statistics (fragment size distribution, fragment mass distribution, and fractal dimension) and morphometric characters (fragment shape isotropy) to offer new insights into the disintegration characteristics of the earthquake-induced catastrophic mass movements.<br/> © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.},\nkey = {Fractal dimension},\n%keywords = {Boundary conditions;Landslides;Particle size analysis;Wave transmission;Disintegration;Earthquakes;},\n%note = {Absorbing boundary condition;Disintegration characteristics;Dynamic disintegration;Earthquake-induced landslides;Fragment mass distribution;Fragment size distribution;Granular temperature;Particle kinematics;},\nURL = {http://dx.doi.org/10.1007/s10346-020-01508-1},\n} \n\n\n
\n
\n\n\n
\n Aiming to understand the dynamic disintegration and transport behavior of an earthquake-induced landslide, a dynamic discrete element method has been employed to analyze the Wangjiayan landslide triggered by the 2008 Ms 8.0 Wenchuan earthquake. Absorbing boundary condition is used for the seismic wave transmission and reflection at the slope base. The numerical results show that under seismic loading, internal rock damage initiates, propagates, and coalesces progressively along the weak solid structure and subsequently leads to fragmentation and pulverization of the slope mass. This can be quantitatively interpreted with the continuously rapid increase of the damage ratio and sudden decline of growth ratio of the number of fragments after the peak seismic shaking. During emplacement evolution, fragmented deformation patterns within the translating joint-defined granular assemblies are affected by the locally high dilatancy with a simultaneous occurrence of highly energetic collisions related to the action of shearing, and this can be quantified by the enhancement of particle kinematic activities (high vibrational and rotational granular temperatures) and intense fluctuations of location-dependent global dispersive stress. In this process, slope destabilized and transports downward in a rapid pulsing motion as friction bonds are locally and continually overcome by the seismic- and gravity-induced shear forces. The joint-determined fragment network before movement initiation and the final fragmented depositions after the rapidly sheared transport have been systematically investigated by fragment statistics (fragment size distribution, fragment mass distribution, and fractal dimension) and morphometric characters (fragment shape isotropy) to offer new insights into the disintegration characteristics of the earthquake-induced catastrophic mass movements.
© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.\n
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\n \n\n \n \n \n \n \n \n Influence of Bond Pattern on the in-plane Behavior of URM Piers.\n \n \n \n \n\n\n \n Malomo, D.; DeJong, M.; and Penna, A.\n\n\n \n\n\n\n International Journal of Architectural Heritage, 15(10): 1492 - 1511. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"InfluencePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20203309037600 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Influence of Bond Pattern on the in-plane Behavior of URM Piers},\njournal = {International Journal of Architectural Heritage},\nauthor = {Malomo, D. and DeJong, M.J. and Penna, A.},\nvolume = {15},\nnumber = {10},\nyear = {2021},\npages = {1492 - 1511},\nissn = {15583058},\nabstract = {<div data-language="eng" data-ev-field="abstract">The overall seismic resistance of unreinforced masonry (URM) systems that exhibit box-behavior mainly relies on the lateral force capacity of structural components. Despite the fact that it is widely accepted that masonry bond pattern might considerably affect the in-plane performance of URM members, this aspect has not fully addressed experimentally or numerically. In this paper, calibrated numerical models, developed within the framework of the Distinct Element Method, are used to simulate the quasi-static lateral response of URM piers under several combinations of boundary conditions, vertical pressures and aspect ratios, as well as a large number of typically-employed periodic and quasi-periodic bond patterns. The employment of time, size and mass scaling, and dynamic relaxation procedures, combined with the introduction of equivalent interface properties to represent the effect of cyclic damage through monotonic loading schemes, provided a significant reduction of computational cost, thus enabling a comprehensive parametric study to be carried out within an acceptable timeframe. The results show that the bond pattern has an appreciable influence on the response of laterally-loaded URM panels, motivating the possibility of including this aspect in the assessment of existing URM structures. Analytical formulations were also inferred by fitting numerical data, thus enabling the findings of this work to be readily implemented in assessment using simplified models.<br/></div> © 2019 Taylor & Francis.},\nkey = {Numerical models},\n%keywords = {Masonry materials;Aspect ratio;Numerical methods;Piers;},\n%note = {Analytical formulation;Bond patterns;Computational costs;Distinct element methods;Interface property;Seismic resistance;Structural component;Unreinforced masonry;},\nURL = {http://dx.doi.org/10.1080/15583058.2019.1702738},\n} \n\n\n
\n
\n\n\n
\n
The overall seismic resistance of unreinforced masonry (URM) systems that exhibit box-behavior mainly relies on the lateral force capacity of structural components. Despite the fact that it is widely accepted that masonry bond pattern might considerably affect the in-plane performance of URM members, this aspect has not fully addressed experimentally or numerically. In this paper, calibrated numerical models, developed within the framework of the Distinct Element Method, are used to simulate the quasi-static lateral response of URM piers under several combinations of boundary conditions, vertical pressures and aspect ratios, as well as a large number of typically-employed periodic and quasi-periodic bond patterns. The employment of time, size and mass scaling, and dynamic relaxation procedures, combined with the introduction of equivalent interface properties to represent the effect of cyclic damage through monotonic loading schemes, provided a significant reduction of computational cost, thus enabling a comprehensive parametric study to be carried out within an acceptable timeframe. The results show that the bond pattern has an appreciable influence on the response of laterally-loaded URM panels, motivating the possibility of including this aspect in the assessment of existing URM structures. Analytical formulations were also inferred by fitting numerical data, thus enabling the findings of this work to be readily implemented in assessment using simplified models.
© 2019 Taylor & Francis.\n
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\n \n\n \n \n \n \n \n \n A TLBO-optimized artificial neural network for modeling axial capacity of pile foundations.\n \n \n \n \n\n\n \n Benali, A.; Hachama, M.; Bounif, A.; Nechnech, A.; and Karray, M.\n\n\n \n\n\n\n Engineering with Computers, 37(1): 675 - 684. 2021.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20193507386006 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A TLBO-optimized artificial neural network for modeling axial capacity of pile foundations},\njournal = {Engineering with Computers},\nauthor = {Benali, Amel and Hachama, Mohammed and Bounif, Aouda and Nechnech, Ammar and Karray, Mourad},\nvolume = {37},\nnumber = {1},\nyear = {2021},\npages = {675 - 684},\nissn = {01770667},\nabstract = {Due to a considerable level of uncertainty describing the pile–soil behavior, many pile capacity prediction methods have focused on correlation with in situ tests. In recent years, artificial neural networks (ANNs) have been applied successfully in many problems in geotechnical engineering, especially, axial pile capacity estimation for driven and drilled shaft piles. Training neural networks is a crucial task that needs effective optimization algorithms. The most popular algorithm is a back-propagation method (BP), which is based on a gradient descent that can trap in local minima. The paper proposes a new artificial neural network (ANN) in which the learning is performed using a recent teaching–learning-based optimization algorithm (TLBO), improving axial capacity predictions. The model is trained and validated on 479 data sets for a wide range of uncemented soils and pile configurations, obtained from the literature. Results show that the considered TLBO-ANN model outperforms other state-of-the-art models in the prediction accuracy and the generalization capability. For instance, we obtained a coefficient of determination R<sup>2</sup>= 0.941 and a variance accounted for VAF = 94.09 % for TLBO-ANN while R<sup>2</sup>= 0.871 and VAF = 87.31 % for the classical BP-ANN. In addition, error investigation with log-normal approaches demonstrates that the probability that predictions fall within a ±25% accuracy level for TLBO-ANN model is 0.93 and that for BP-ANN model is 0.75. The proposed TLBO-ANN model predicts pile capacity with more accuracy, less scatter, and higher reliability.<br/> © 2019, Springer-Verlag London Ltd., part of Springer Nature.},\nkey = {Neural networks},\n%keywords = {Failure (mechanical);Load testing;Geotechnical engineering;Backpropagation;Optimization;Piles;Forecasting;Gradient methods;},\n%note = {Failure zone;Pile load test;SPT data;TLBO-ANN;Ultimate capacity;},\nURL = {http://dx.doi.org/10.1007/s00366-019-00847-5},\n} \n\n\n
\n
\n\n\n
\n Due to a considerable level of uncertainty describing the pile–soil behavior, many pile capacity prediction methods have focused on correlation with in situ tests. In recent years, artificial neural networks (ANNs) have been applied successfully in many problems in geotechnical engineering, especially, axial pile capacity estimation for driven and drilled shaft piles. Training neural networks is a crucial task that needs effective optimization algorithms. The most popular algorithm is a back-propagation method (BP), which is based on a gradient descent that can trap in local minima. The paper proposes a new artificial neural network (ANN) in which the learning is performed using a recent teaching–learning-based optimization algorithm (TLBO), improving axial capacity predictions. The model is trained and validated on 479 data sets for a wide range of uncemented soils and pile configurations, obtained from the literature. Results show that the considered TLBO-ANN model outperforms other state-of-the-art models in the prediction accuracy and the generalization capability. For instance, we obtained a coefficient of determination R2= 0.941 and a variance accounted for VAF = 94.09 % for TLBO-ANN while R2= 0.871 and VAF = 87.31 % for the classical BP-ANN. In addition, error investigation with log-normal approaches demonstrates that the probability that predictions fall within a ±25% accuracy level for TLBO-ANN model is 0.93 and that for BP-ANN model is 0.75. The proposed TLBO-ANN model predicts pile capacity with more accuracy, less scatter, and higher reliability.
© 2019, Springer-Verlag London Ltd., part of Springer Nature.\n
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\n  \n 2020\n \n \n (123)\n \n \n
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\n \n\n \n \n \n \n \n \n Effect of concrete workability on bond properties of steel rebar in pre-cracked concrete.\n \n \n \n \n\n\n \n Mousavi, S. S.; Bhojaraju, C.; Ouellet-Plamondon, C. M.; and Guizani, L.\n\n\n \n\n\n\n Proceedings of the Institution of Civil Engineers: Structures and Buildings, 177(3): 195 - 208. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"EffectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20214811219908 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of concrete workability on bond properties of steel rebar in pre-cracked concrete},\njournal = {Proceedings of the Institution of Civil Engineers: Structures and Buildings},\nauthor = {Mousavi, Seyed Sina and Bhojaraju, Chandrasekhar and Ouellet-Plamondon, Claudiane M. and Guizani, Lotfi},\nvolume = {177},\nnumber = {3},\nyear = {2020},\npages = {195 - 208},\nissn = {09650911},\nabstract = {<div data-language="eng" data-ev-field="abstract">Although research has shown a considerable influence of the pre-cracking phenomenon on steel-congested concrete members, only normal concrete (NC) has been considered in the literature. The intention in this paper is thus to study the effect of the pre-cracking phenomenon on the bond response of pre-cracked NC with different slump flow values and self-consolidating concrete (SCC). Initial crack widths ranging from 0.0 to 0.5 mm are studied. Results show that initial crack widths larger than 0.10 mm have a significant influence on bond properties, such that reduction factors greater than 30% and 50% are obtained for the maximum bond strength of concrete specimens exposed to initial crack widths of 0.2 mm and 0.4 mm, respectively. Results show that concrete mixtures with higher workability are less sensitive to the pre-cracking phenomenon as compared to NC mixtures. The average bond stress of steel rebar in the pre-cracked SCC is found to be similar to that of the NC with a slump flow of 200 mm, which is considerably better than for NC with a slump flow of 97 mm. Moreover, results show that 65.8, 80.6, 88.5 and 93.1% fracture energy reductions are obtained for crack widths of 0.20, 0.30, 0.40 and 0.50 mm, respectively, as compared to the small crack width of 0.15 mm.<br/></div> © 2020 ICE Publishing. All rights reserved.},\nkey = {Concrete mixtures},\n%keywords = {Mixtures;Reduction;},\n%note = {Bond properties;Concrete manufacture;Concrete technology;Initial crack widths;Normal concretes;Pre-cracking;Slump flow;Steel rebars;Strength & testing of material;Strength testing;},\nURL = {http://dx.doi.org/10.1680/jstbu.20.00111},\n} \n\n\n
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\n
Although research has shown a considerable influence of the pre-cracking phenomenon on steel-congested concrete members, only normal concrete (NC) has been considered in the literature. The intention in this paper is thus to study the effect of the pre-cracking phenomenon on the bond response of pre-cracked NC with different slump flow values and self-consolidating concrete (SCC). Initial crack widths ranging from 0.0 to 0.5 mm are studied. Results show that initial crack widths larger than 0.10 mm have a significant influence on bond properties, such that reduction factors greater than 30% and 50% are obtained for the maximum bond strength of concrete specimens exposed to initial crack widths of 0.2 mm and 0.4 mm, respectively. Results show that concrete mixtures with higher workability are less sensitive to the pre-cracking phenomenon as compared to NC mixtures. The average bond stress of steel rebar in the pre-cracked SCC is found to be similar to that of the NC with a slump flow of 200 mm, which is considerably better than for NC with a slump flow of 97 mm. Moreover, results show that 65.8, 80.6, 88.5 and 93.1% fracture energy reductions are obtained for crack widths of 0.20, 0.30, 0.40 and 0.50 mm, respectively, as compared to the small crack width of 0.15 mm.
© 2020 ICE Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Assessing the capabilities of the Surface Water and Ocean Topography (SWOT) mission for large lake water surface elevation monitoring under different wind conditions.\n \n \n \n \n\n\n \n Bergeron, J.; Siles, G.; Leconte, R.; Trudel, M.; Desroches, D.; and Peters, D. L.\n\n\n \n\n\n\n Hydrology and Earth System Sciences, 24(12): 5985 - 6000. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"AssessingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20205309698201 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessing the capabilities of the Surface Water and Ocean Topography (SWOT) mission for large lake water surface elevation monitoring under different wind conditions},\njournal = {Hydrology and Earth System Sciences},\nauthor = {Bergeron, Jean and Siles, Gabriela and Leconte, Robert and Trudel, Melanie and Desroches, Damien and Peters, Daniel L.},\nvolume = {24},\nnumber = {12},\nyear = {2020},\npages = {5985 - 6000},\nissn = {10275606},\nabstract = {Lakes are important sources of freshwater and provide essential ecosystem services. Monitoring their spatial and temporal variability, and their functions, is an important task within the development of sustainable water management strategies. The Surface Water and Ocean Topography (SWOT) mission will provide continuous information on the dynamics of continental (rivers, lakes, wetlands and reservoirs) and ocean water bodies. This work aims to contribute to the international effort evaluating the SWOT satellite (2022 launch) performance for water balance assessment over large lakes (e.g., span classCombining double low line"inline-formula" /i100 /span km span classCombining double low line"inline-formula"2 /span). For this purpose, a hydrodynamic model was set up over Mamawi Lake, Canada, and different wind scenarios on lake hydrodynamics were simulated. The derived water surface elevations (WSEs) were compared to synthetic elevations produced by the Jet Propulsion Laboratory (JPL) SWOT high resolution (SWOT-HR) simulator. Moreover, water storages and net flows were retrieved from different possible SWOT orbital configurations and synthetic gauge measurements. In general, a good agreement was found between the WSE simulated from the model and those mimicked by the SWOT-HR simulator. Depending on the wind scenario, errors ranged between approximately span classCombining double low line"inline-formula"-2 /span and 5 cm for mean error and from 30 to 70 cm root mean square error. Low spatial coverage of the lake was found to generate important biases in the retrievals of water volume or net flow between two satellite passes in the presence of local heterogeneities in WSE. However, the precision of retrievals was found to increase as spatial coverage increases, becoming more reliable than the retrievals from three synthetic gauges when spatial coverage approaches 100 %, demonstrating the capabilities of the future SWOT mission in monitoring dynamic WSE for large lakes across Canada.<br/> © 2020 Copernicus GmbH. All rights reserved.},\nkey = {Lakes},\n%keywords = {Errors;Oceanography;Mean square error;Orbits;Topography;Reservoirs (water);Water conservation;Gages;Hydrodynamics;Water management;Ecosystems;},\n%note = {Ecosystem services;Jet Propulsion Laboratory;Local heterogeneity;Orbital configuration;Root mean square errors;Spatial and temporal variability;Sustainable water management;Water surface elevations;},\nURL = {http://dx.doi.org/10.5194/hess-24-5985-2020},\n} \n\n\n
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\n Lakes are important sources of freshwater and provide essential ecosystem services. Monitoring their spatial and temporal variability, and their functions, is an important task within the development of sustainable water management strategies. The Surface Water and Ocean Topography (SWOT) mission will provide continuous information on the dynamics of continental (rivers, lakes, wetlands and reservoirs) and ocean water bodies. This work aims to contribute to the international effort evaluating the SWOT satellite (2022 launch) performance for water balance assessment over large lakes (e.g., span classCombining double low line\"inline-formula\" /i100 /span km span classCombining double low line\"inline-formula\"2 /span). For this purpose, a hydrodynamic model was set up over Mamawi Lake, Canada, and different wind scenarios on lake hydrodynamics were simulated. The derived water surface elevations (WSEs) were compared to synthetic elevations produced by the Jet Propulsion Laboratory (JPL) SWOT high resolution (SWOT-HR) simulator. Moreover, water storages and net flows were retrieved from different possible SWOT orbital configurations and synthetic gauge measurements. In general, a good agreement was found between the WSE simulated from the model and those mimicked by the SWOT-HR simulator. Depending on the wind scenario, errors ranged between approximately span classCombining double low line\"inline-formula\"-2 /span and 5 cm for mean error and from 30 to 70 cm root mean square error. Low spatial coverage of the lake was found to generate important biases in the retrievals of water volume or net flow between two satellite passes in the presence of local heterogeneities in WSE. However, the precision of retrievals was found to increase as spatial coverage increases, becoming more reliable than the retrievals from three synthetic gauges when spatial coverage approaches 100 %, demonstrating the capabilities of the future SWOT mission in monitoring dynamic WSE for large lakes across Canada.
© 2020 Copernicus GmbH. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Investigation of the effects of heat loss through below-grade envelope of buildings in urban areas on thermo-mechanical behaviour of geothermal piles.\n \n \n \n \n\n\n \n Saaly, M.; Maghoul, P.; and Hollander, H.\n\n\n \n\n\n\n In volume 205, La Jolla, CA, United states, 2020. \n \n\n\n\n
\n\n\n\n \n \n \"InvestigationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20205109652561 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigation of the effects of heat loss through below-grade envelope of buildings in urban areas on thermo-mechanical behaviour of geothermal piles},\njournal = {E3S Web of Conferences},\nauthor = {Saaly, Maryam and Maghoul, Pooneh and Hollander, Hartmut},\nvolume = {205},\nyear = {2020},\nissn = {25550403},\naddress = {La Jolla, CA, United states},\nabstract = {Harvesting geothermal energy through the use of thermo-active pile systems is an eco-friendly technique to provide HVAC energy demand of buildings. Mechanical behaviour of thermo-active piles is impacted by thermal cycles. Moreover, in urban areas, the temperature of the ground is higher than non-constructed areas due to the heat loss through the below-grade enclosure of buildings. This heat dissipation increases the thermal capacity of the soil and affects the mechanical response of the geothermal pile foundation subjected to thermo-mechanical loading. To investigate the effect of buildings heat loss on thermo-active piles, a numerical thermo-mechanical (TM) analysis was carried out on a proposed energy foundation system for an institutional building, the Stanley Pauley Engineering Building (SPEB) in the campus of the University of Manitoba, Winnipeg, Canada. The mechanical response of the geothermal piles to the thermal cycles with and without considering heat leakage through the basement of the SPEB is compared. Results showed that the cooling loads induced a maximum vertical pile head displacement of -1.18 mm. After 5 years operation of the system, the maximum vertical pile head displacement decreased to -1.05 mm for the case in which heat loss through the basement in considered in the models. In addition, the maximum axial load effective along the pile axis was 6% higher for the case that considers heat loss through the basement compared to the case without considering heat leakage through the building's below-grade envelope.<br/> © The Authors, published by EDP Sciences, 2020.},\nkey = {Piles},\n%keywords = {Pile foundations;Thermal cycling;Geothermal energy;Heat losses;Buildings;},\n%note = {Energy demands;Foundation systems;Institutional building;Mechanical behaviour;Mechanical response;Thermo-mechanical;Thermo-mechanical loading;Vertical piles;},\nURL = {http://dx.doi.org/10.1051/e3sconf/202020505010},\n} \n\n\n
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\n Harvesting geothermal energy through the use of thermo-active pile systems is an eco-friendly technique to provide HVAC energy demand of buildings. Mechanical behaviour of thermo-active piles is impacted by thermal cycles. Moreover, in urban areas, the temperature of the ground is higher than non-constructed areas due to the heat loss through the below-grade enclosure of buildings. This heat dissipation increases the thermal capacity of the soil and affects the mechanical response of the geothermal pile foundation subjected to thermo-mechanical loading. To investigate the effect of buildings heat loss on thermo-active piles, a numerical thermo-mechanical (TM) analysis was carried out on a proposed energy foundation system for an institutional building, the Stanley Pauley Engineering Building (SPEB) in the campus of the University of Manitoba, Winnipeg, Canada. The mechanical response of the geothermal piles to the thermal cycles with and without considering heat leakage through the basement of the SPEB is compared. Results showed that the cooling loads induced a maximum vertical pile head displacement of -1.18 mm. After 5 years operation of the system, the maximum vertical pile head displacement decreased to -1.05 mm for the case in which heat loss through the basement in considered in the models. In addition, the maximum axial load effective along the pile axis was 6% higher for the case that considers heat loss through the basement compared to the case without considering heat leakage through the building's below-grade envelope.
© The Authors, published by EDP Sciences, 2020.\n
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\n \n\n \n \n \n \n \n \n A WCSPH particle shifting strategy for simulating violent free surface flows.\n \n \n \n \n\n\n \n Krimi, A.; Jandaghian, M.; and Shakibaeinia, A.\n\n\n \n\n\n\n Water (Switzerland), 12(11): 1 - 37. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204709518375 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A WCSPH particle shifting strategy for simulating violent free surface flows},\njournal = {Water (Switzerland)},\nauthor = {Krimi, Abdelkader and Jandaghian, Mojtaba and Shakibaeinia, Ahmad},\nvolume = {12},\nnumber = {11},\nyear = {2020},\npages = {1 - 37},\nissn = {20734441},\nabstract = {In this work, we develop an enhanced particle shifting strategy in the framework of weakly compressible δ<sup>+</sup>-SPH method. This technique can be considered as an extension of the so-called improved particle shifting technology (IPST) proposed by Wang et al. (2019). We introduce a new parameter named "φ" to the particle shifting formulation, on the one hand to reduce the effect of truncated kernel support on the formulation near the free surface region, on the other hand, to deal with the problem of poor estimation of free surface particles. We define a simple criterion based on the estimation of particle concentration to limit the error’s accumulation in time caused by the shifting in order to achieve a long time violent free surface flows simulation. We propose also an efficient and simple concept for free surface particles detection. A validation of accuracy, stability and consistency of the presented model was shown via several challenging benchmarks.<br/> © 2020 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Hydrodynamics},\n%note = {Free surfaces;New parameters;Particle concentrations;Shifting strategy;SPH methods;Violent free-surface flow;},\nURL = {http://dx.doi.org/10.3390/w12113189},\n} \n\n\n
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\n In this work, we develop an enhanced particle shifting strategy in the framework of weakly compressible δ+-SPH method. This technique can be considered as an extension of the so-called improved particle shifting technology (IPST) proposed by Wang et al. (2019). We introduce a new parameter named \"φ\" to the particle shifting formulation, on the one hand to reduce the effect of truncated kernel support on the formulation near the free surface region, on the other hand, to deal with the problem of poor estimation of free surface particles. We define a simple criterion based on the estimation of particle concentration to limit the error’s accumulation in time caused by the shifting in order to achieve a long time violent free surface flows simulation. We propose also an efficient and simple concept for free surface particles detection. A validation of accuracy, stability and consistency of the presented model was shown via several challenging benchmarks.
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Experimental Investigation of Axial Load and Detailing Effects on the Inelastic Response of Reinforced-Concrete Masonry Structural Walls with Boundary Elements.\n \n \n \n \n\n\n \n Aly, N.; and Galal, K.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(12). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204009296916 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental Investigation of Axial Load and Detailing Effects on the Inelastic Response of Reinforced-Concrete Masonry Structural Walls with Boundary Elements},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Aly, Nader and Galal, Khaled},\nvolume = {146},\nnumber = {12},\nyear = {2020},\nissn = {07339445},\nabstract = {In typical wall load-bearing reinforced-masonry (RM) buildings, the lateral and vertical forces are resisted by rectangular shear walls. Thus, the walls are subjected to high vertical forces from gravity loads that are expected to limit the displacement and energy dissipation capacities. Moreover, the rectangular RM shear walls have limited lateral stability because of the single vertical reinforcement layer. The intent of this study is to investigate the inelastic cyclic response of RM structural walls subjected to axial compressive stress that results in precompression ratios, P/Agfm, higher than 10%. The main objective is to propose practical component-level seismic detailing recommendations to enhance the overall structural performance. In this respect, three half-scale, fully grouted RM shear walls were tested under constant axial load, in-plane fully reversed cyclic loading, and top moment. The tested specimens are flexural dominant to simulate the response of mid and high-rise RM shear walls under strong seismic actions. The walls were designed to have enlarged boundary elements built using C-shaped blocks to evaluate the ability of end zone detailing and confinement to alleviate the impact of the high axial load. The test results demonstrated an overall enhanced structural performance for the three walls. The three specimens attained high ductility levels, high energy dissipation capacity, and failure in the ductile flexural mode. The presence of the well-detailed and confined boundary elements was effective in mitigating the impact of the high axial compression load. Thus, utilizing this type of masonry shear wall increases the competitiveness of masonry buildings as an alternative construction method.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Shear walls},\n%keywords = {Energy dissipation;Reinforced concrete;Seismology;Structural analysis;Axial loads;Ductility;Shear flow;},\n%note = {Axial compression load;Axial-compressive stress;Construction method;Energy dissipation capacities;Experimental investigations;Reinforced concrete masonry;Structural performance;Vertical reinforcement;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002842},\n} \n\n\n
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\n In typical wall load-bearing reinforced-masonry (RM) buildings, the lateral and vertical forces are resisted by rectangular shear walls. Thus, the walls are subjected to high vertical forces from gravity loads that are expected to limit the displacement and energy dissipation capacities. Moreover, the rectangular RM shear walls have limited lateral stability because of the single vertical reinforcement layer. The intent of this study is to investigate the inelastic cyclic response of RM structural walls subjected to axial compressive stress that results in precompression ratios, P/Agfm, higher than 10%. The main objective is to propose practical component-level seismic detailing recommendations to enhance the overall structural performance. In this respect, three half-scale, fully grouted RM shear walls were tested under constant axial load, in-plane fully reversed cyclic loading, and top moment. The tested specimens are flexural dominant to simulate the response of mid and high-rise RM shear walls under strong seismic actions. The walls were designed to have enlarged boundary elements built using C-shaped blocks to evaluate the ability of end zone detailing and confinement to alleviate the impact of the high axial load. The test results demonstrated an overall enhanced structural performance for the three walls. The three specimens attained high ductility levels, high energy dissipation capacity, and failure in the ductile flexural mode. The presence of the well-detailed and confined boundary elements was effective in mitigating the impact of the high axial compression load. Thus, utilizing this type of masonry shear wall increases the competitiveness of masonry buildings as an alternative construction method.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Wind loads on low-slope roofs of buildings with large plan dimensions.\n \n \n \n \n\n\n \n Aldoum, M.; and Stathopoulos, T.\n\n\n \n\n\n\n Engineering Structures, 225. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"WindPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20203909224874 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind loads on low-slope roofs of buildings with large plan dimensions},\njournal = {Engineering Structures},\nauthor = {Aldoum, Murad and Stathopoulos, Ted},\nvolume = {225},\nyear = {2020},\nissn = {01410296},\nabstract = {Wind load provisions in the North American codes and standards incorporate the results of wind tunnel studies and the full-scale measurements of wind loads. These studies examined wind effects on buildings with regular plan size, i.e. less than 60 m. This fact emphasizes the importance of testing large buildings in the wind tunnel and highlights the necessity of investigating the applicability of the North American code and standard provisions to large buildings. In the present study, three building models were constructed at a length scale of 1:400 with identical plan dimensions (equivalent to 118 m × 118 m) and different heights (equivalent to 5 m, 10 m and 20 m). The models were tested in simulated open country and suburban exposures. The experimental results were compared with full-scale data and the wind provisions of the North American codes and standards. It was found that the external peak pressure coefficients recommended by ASCE 7-16 (2017) are much higher than the experimental findings whereas those recommended by ASCE 7-10 (2010) are consistent with the experimental results. However, the experimental results indicate that the corner zone should be better defined as an L-shape for large buildings of 8 m height or more and the wind loads developed on the roof corner are approximately equal to those on the edge zone for large buildings of height less than 8 m.<br/> © 2020 Elsevier Ltd},\nkey = {Wind tunnels},\n%keywords = {Codes (symbols);Wind stress;Roofs;Buildings;Aerodynamic loads;},\n%note = {Building model;Codes and standards;Different heights;Full scale measurements;Large buildings;Low-Slope Roof;North American;Wind load provisions;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2020.111298},\n} \n\n\n
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\n Wind load provisions in the North American codes and standards incorporate the results of wind tunnel studies and the full-scale measurements of wind loads. These studies examined wind effects on buildings with regular plan size, i.e. less than 60 m. This fact emphasizes the importance of testing large buildings in the wind tunnel and highlights the necessity of investigating the applicability of the North American code and standard provisions to large buildings. In the present study, three building models were constructed at a length scale of 1:400 with identical plan dimensions (equivalent to 118 m × 118 m) and different heights (equivalent to 5 m, 10 m and 20 m). The models were tested in simulated open country and suburban exposures. The experimental results were compared with full-scale data and the wind provisions of the North American codes and standards. It was found that the external peak pressure coefficients recommended by ASCE 7-16 (2017) are much higher than the experimental findings whereas those recommended by ASCE 7-10 (2010) are consistent with the experimental results. However, the experimental results indicate that the corner zone should be better defined as an L-shape for large buildings of 8 m height or more and the wind loads developed on the roof corner are approximately equal to those on the edge zone for large buildings of height less than 8 m.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Experimental study of rate-dependent uniaxial compressive behaviors of two artificial frozen sandy clay soils.\n \n \n \n \n\n\n \n Girgis, N.; Li, B.; Akhtar, S.; and Courcelles, B.\n\n\n \n\n\n\n Cold Regions Science and Technology, 180. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20203909226588 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental study of rate-dependent uniaxial compressive behaviors of two artificial frozen sandy clay soils},\njournal = {Cold Regions Science and Technology},\nauthor = {Girgis, Nader and Li, Biao and Akhtar, Sohail and Courcelles, Benoit},\nvolume = {180},\nyear = {2020},\nissn = {0165232X},\nabstract = {The rate-dependent uniaxial compressive behavior of frozen clay soil is strongly affected by its minerals, void ratio, stress history, and pore fluid salinity. Previous studies show that an extremely low deformation rate applied on a clay soil tends to result in a lower bound compressive strength. However, the lower bound stress-strain behavior of frozen clay soil under the uniaxial compressive condition was not studied. A thorough understanding of the rate-dependent behavior of frozen clay and its relationship with temperature requires a large number of specimens with similar compositions and micro-structures. In this study, a series of laboratory tests were carried out on artificial frozen sandy clay soils to measure the rate-dependent uniaxial compressive behavior at temperatures ranging from −15 °C to 0 °C. We used two types of artificial frozen clay soils with pre-determined clay fraction, clay mineralogy, stress history, and moisture content. Our results conclude that a low temperature and a high deformation rate tend to generate brittle failure with post-peak softening behavior. A temperature close to the freezing temperature and a low deformation rate result in a diffuse failure associated with strain hardening. Temperature-dependent uniaxial compressive mechanical properties were measured and modeled using empirical relations, which are highly dependent on the applied deformation rate. A series of step-loaded relaxation tests were carried out on those artificial clay soils and creep parameters were estimated using relaxation test results and a power law creep model. A new approach of deriving the lower bound of stress-strain curve of frozen soil is proposed accordingly. The idea of determining the lower bound of stress-strain curve is based on the isotache concept, which was previously used in the soil consolidation theory.<br/> © 2020 Elsevier B.V.},\nkey = {Stress-strain curves},\n%keywords = {Compressive strength;Compression testing;Temperature;Strain rate;Stress relaxation;Creep;Soil testing;Strain hardening;Failure (mechanical);Frozen soils;Soil mechanics;},\n%note = {Freezing temperatures;Pore-fluid salinity;Post-peak softening;Power-law creep model;Rate-dependent behaviors;Stress-strain behaviors;Temperature dependent;Uniaxial compressive;},\nURL = {http://dx.doi.org/10.1016/j.coldregions.2020.103166},\n} \n\n\n
\n
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\n The rate-dependent uniaxial compressive behavior of frozen clay soil is strongly affected by its minerals, void ratio, stress history, and pore fluid salinity. Previous studies show that an extremely low deformation rate applied on a clay soil tends to result in a lower bound compressive strength. However, the lower bound stress-strain behavior of frozen clay soil under the uniaxial compressive condition was not studied. A thorough understanding of the rate-dependent behavior of frozen clay and its relationship with temperature requires a large number of specimens with similar compositions and micro-structures. In this study, a series of laboratory tests were carried out on artificial frozen sandy clay soils to measure the rate-dependent uniaxial compressive behavior at temperatures ranging from −15 °C to 0 °C. We used two types of artificial frozen clay soils with pre-determined clay fraction, clay mineralogy, stress history, and moisture content. Our results conclude that a low temperature and a high deformation rate tend to generate brittle failure with post-peak softening behavior. A temperature close to the freezing temperature and a low deformation rate result in a diffuse failure associated with strain hardening. Temperature-dependent uniaxial compressive mechanical properties were measured and modeled using empirical relations, which are highly dependent on the applied deformation rate. A series of step-loaded relaxation tests were carried out on those artificial clay soils and creep parameters were estimated using relaxation test results and a power law creep model. A new approach of deriving the lower bound of stress-strain curve of frozen soil is proposed accordingly. The idea of determining the lower bound of stress-strain curve is based on the isotache concept, which was previously used in the soil consolidation theory.
© 2020 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Soil moisture retrievals using ALOS2-ScanSAR and MODIS synergy over Tibetan Plateau.\n \n \n \n \n\n\n \n Wang, H.; Magagi, R.; Goita, K.; and Wang, K.\n\n\n \n\n\n\n Remote Sensing of Environment, 251. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"SoilPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20203909239314 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Soil moisture retrievals using ALOS2-ScanSAR and MODIS synergy over Tibetan Plateau},\njournal = {Remote Sensing of Environment},\nauthor = {Wang, Hongquan and Magagi, Ramata and Goita, Kalifa and Wang, Ke},\nvolume = {251},\nyear = {2020},\nissn = {00344257},\nabstract = {This paper investigates the soil moisture retrievals over Tibetan Plateau using multi-temporal ALOS2-PALSAR2 data acquired in ScanSAR mode, in contrary to the commonly used StripMap SAR imaging mode. Considering the dual-polarimetry with limited observables, the surface roughness parameters such as the RMS height and auto-correlation length are first estimated by optimizing the semi-empirical Oh2004 model applied to the ALOS2 data acquired under bare soil condition. The vegetation water content corresponding to each ALOS2 acquisition time is derived from an empirical model applied to the temporally interpolated MODIS NDVI data. Then, the obtained roughness and vegetation optical depth are substituted into the Water Cloud Model which we modified by adding a double-bounce component according to the L-band scattering processes to retrieve the effective scattering albedo and soil moisture. The results show that the optimized surface RMS height and the associated slope are negatively related to a dual-angular radar index ΔHH, indicating the feasibility to optimize the relatively stable surface roughness parameters before retrieving the soil moisture dynamics. The obtained vegetation optical depth which is cross-validated against a normalized cross-polarized radar descriptor indicates a significant increase from May to August, in response to the vegetation phenological growth. Furthermore, the time-variable scattering albedo is less than 0.08, and slightly increases with the vegetation development. By accounting for the double-bounce component, the retrieved soil moisture better agrees with the ground measurements with R = 0.89 and RMSE = 0.058 m<sup>3</sup>/m<sup>3</sup>, but exhibits an overestimation issue for the soil moisture higher than 0.35 m<sup>3</sup>/m<sup>3</sup> due to the saturation of SAR signal and the relatively strong vegetation cover. A positive correspondence (R = 0.81) between the retrieved soil moisture and the interpolated NDVI was found, verifying their close coupling in the soil-vegetation system. This study deepens the insights in the potential integration between the optical and L-band microwave observations to retrieve soil moisture over vegetated area.<br/> © 2020 Elsevier Inc.},\nkey = {Soil moisture},\n%keywords = {Radiometers;Vegetation;Surface roughness;Radiative transfer;Optical properties;Soil surveys;Synthetic aperture radar;Solar radiation;},\n%note = {Ground measurements;Microwave observations;Soil moisture dynamics;Soil moisture retrievals;Surface roughness parameters;Vegetation optical depth;Vegetation water content;Water cloud models;},\nURL = {http://dx.doi.org/10.1016/j.rse.2020.112100},\n} \n\n\n
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\n This paper investigates the soil moisture retrievals over Tibetan Plateau using multi-temporal ALOS2-PALSAR2 data acquired in ScanSAR mode, in contrary to the commonly used StripMap SAR imaging mode. Considering the dual-polarimetry with limited observables, the surface roughness parameters such as the RMS height and auto-correlation length are first estimated by optimizing the semi-empirical Oh2004 model applied to the ALOS2 data acquired under bare soil condition. The vegetation water content corresponding to each ALOS2 acquisition time is derived from an empirical model applied to the temporally interpolated MODIS NDVI data. Then, the obtained roughness and vegetation optical depth are substituted into the Water Cloud Model which we modified by adding a double-bounce component according to the L-band scattering processes to retrieve the effective scattering albedo and soil moisture. The results show that the optimized surface RMS height and the associated slope are negatively related to a dual-angular radar index ΔHH, indicating the feasibility to optimize the relatively stable surface roughness parameters before retrieving the soil moisture dynamics. The obtained vegetation optical depth which is cross-validated against a normalized cross-polarized radar descriptor indicates a significant increase from May to August, in response to the vegetation phenological growth. Furthermore, the time-variable scattering albedo is less than 0.08, and slightly increases with the vegetation development. By accounting for the double-bounce component, the retrieved soil moisture better agrees with the ground measurements with R = 0.89 and RMSE = 0.058 m3/m3, but exhibits an overestimation issue for the soil moisture higher than 0.35 m3/m3 due to the saturation of SAR signal and the relatively strong vegetation cover. A positive correspondence (R = 0.81) between the retrieved soil moisture and the interpolated NDVI was found, verifying their close coupling in the soil-vegetation system. This study deepens the insights in the potential integration between the optical and L-band microwave observations to retrieve soil moisture over vegetated area.
© 2020 Elsevier Inc.\n
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\n \n\n \n \n \n \n \n \n Wind loads on buildings: A code of practice perspective.\n \n \n \n \n\n\n \n Stathopoulos, T.; and Alrawashdeh, H.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 206. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"WindPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20203809194178 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind loads on buildings: A code of practice perspective},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Stathopoulos, Ted and Alrawashdeh, Hatem},\nvolume = {206},\nyear = {2020},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">The paper reviews the wind loading of buildings from a code perspective. The Canadian wind load provisions for buildings, due primarily to the ingenuity of Alan G. Davenport, have gained an international reputation after recognition for their innovative and pioneering character by researchers and practitioners across the globe. In this regard, these provisions have been influential in the development and evolution of various national and international wind load standards, including the ASCE 7, the ISO wind load standard, the Eurocode, the China standard for wind loads on roof structures and others. The paper provides first an overview of ASCE 7 (USA), NBCC (Canada) and GB 50009 (China) to gain some insight into the extent to which the external pressures, internal pressures, exposure issues and topography - among others - are currently being addressed through these provisions. The current similarities and differences among wind load provisions for buildings are outlined and attempts are made to resolve some of the apparent discrepancies leading to possibly non-conservative results. Ultimately, innovative codification approaches and trends currently under discussion, development and consideration are also presented.<br/></div> © 2020 Elsevier Ltd},\nkey = {Wind tunnels},\n%keywords = {Topography;Aerodynamic loads;Wind stress;Buildings;Roofs;},\n%note = {Code of practice;Eurocodes;External pressures;Internal pressures;Roof structures;Wind load;Wind load provisions;Wind loading;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2020.104338},\n} \n\n\n
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The paper reviews the wind loading of buildings from a code perspective. The Canadian wind load provisions for buildings, due primarily to the ingenuity of Alan G. Davenport, have gained an international reputation after recognition for their innovative and pioneering character by researchers and practitioners across the globe. In this regard, these provisions have been influential in the development and evolution of various national and international wind load standards, including the ASCE 7, the ISO wind load standard, the Eurocode, the China standard for wind loads on roof structures and others. The paper provides first an overview of ASCE 7 (USA), NBCC (Canada) and GB 50009 (China) to gain some insight into the extent to which the external pressures, internal pressures, exposure issues and topography - among others - are currently being addressed through these provisions. The current similarities and differences among wind load provisions for buildings are outlined and attempts are made to resolve some of the apparent discrepancies leading to possibly non-conservative results. Ultimately, innovative codification approaches and trends currently under discussion, development and consideration are also presented.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Double skin façade integrating semi-transparent photovoltaics: Experimental study on forced convection and heat recovery.\n \n \n \n \n\n\n \n Ioannidis, Z.; Rounis, E.; Athienitis, A.; and Stathopoulos, T.\n\n\n \n\n\n\n Applied Energy, 278. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"DoublePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20203409064474 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Double skin façade integrating semi-transparent photovoltaics: Experimental study on forced convection and heat recovery},\njournal = {Applied Energy},\nauthor = {Ioannidis, Zisis and Rounis, Efstratios-Dimitrios and Athienitis, Andreas and Stathopoulos, Ted},\nvolume = {278},\nyear = {2020},\nissn = {03062619},\nabstract = {Semi-Transparent Photovoltaics (STPV) can be integrated on Double Skin Facades (DSF) to enhance the energy performance of a building. The integrated STPV can simultaneously control solar gains and generate electricity. The optimal operation of the DSF through control of the air flow can enhance the heat extraction from the DSF during heating season, increase the electrical and thermal efficiency of the system, and decrease the heating load of the building. In the present study, the lack of literature in the development of an average Nusselt number correlations for DSF integrating STPV (DSF-STPV) is identified and a new index which corresponds to the heat that is recovered is introduced and is distinguished from the thermal efficiency of the system. Also, in the present study, average Nusselt number correlations for air flow in DSF with STPV are experimentally developed, using a full-scale outdoor test facility. The effect of the incident solar radiation, the wind driven exterior convection and the ambient temperature have been taken into consideration in the development of these convective heat transfer correlations. The properties of the materials of the DSF are also taken into consideration such as the transmittance of the STPV, the PV cell efficiency and the thermal conductance of the glazing. In this process, a new dimensionless number is defined to generalize the results, particularly for the expected operating conditions. The Nusselt number correlations are then used for a sensitivity analysis for different wind speeds and for the assessment of the thermal performance of the system. The heat losses of a typical building in comparison to a building that integrates DSF-STPV can be 20% higher resulting in losses that reach values of 8 W/m<sup>2</sup> of façade area. The heat recovery index can reach more than 30% and the total solar utilization efficiency can be between 30% and 77% for different experimental conditions.<br/> © 2020 Elsevier Ltd},\nkey = {Air},\n%keywords = {Sensitivity analysis;Waste heat utilization;Waste heat;Heat convection;Energy efficiency;Nusselt number;},\n%note = {Convective heat transfer;Dimensionless number;Experimental conditions;Generate electricity;Nusselt number correlation;Outdoor test facilities;Thermal conductance;Utilization efficiency;},\nURL = {http://dx.doi.org/10.1016/j.apenergy.2020.115647},\n} \n\n\n
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\n Semi-Transparent Photovoltaics (STPV) can be integrated on Double Skin Facades (DSF) to enhance the energy performance of a building. The integrated STPV can simultaneously control solar gains and generate electricity. The optimal operation of the DSF through control of the air flow can enhance the heat extraction from the DSF during heating season, increase the electrical and thermal efficiency of the system, and decrease the heating load of the building. In the present study, the lack of literature in the development of an average Nusselt number correlations for DSF integrating STPV (DSF-STPV) is identified and a new index which corresponds to the heat that is recovered is introduced and is distinguished from the thermal efficiency of the system. Also, in the present study, average Nusselt number correlations for air flow in DSF with STPV are experimentally developed, using a full-scale outdoor test facility. The effect of the incident solar radiation, the wind driven exterior convection and the ambient temperature have been taken into consideration in the development of these convective heat transfer correlations. The properties of the materials of the DSF are also taken into consideration such as the transmittance of the STPV, the PV cell efficiency and the thermal conductance of the glazing. In this process, a new dimensionless number is defined to generalize the results, particularly for the expected operating conditions. The Nusselt number correlations are then used for a sensitivity analysis for different wind speeds and for the assessment of the thermal performance of the system. The heat losses of a typical building in comparison to a building that integrates DSF-STPV can be 20% higher resulting in losses that reach values of 8 W/m2 of façade area. The heat recovery index can reach more than 30% and the total solar utilization efficiency can be between 30% and 77% for different experimental conditions.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Applied Element Modelling of the Dynamic Response of a Full-Scale Clay Brick Masonry Building Specimen with Flexible Diaphragms.\n \n \n \n \n\n\n \n Malomo, D.; Pinho, R.; and Penna, A.\n\n\n \n\n\n\n International Journal of Architectural Heritage, 14(10): 1484 - 1501. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"AppliedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20203309037548 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Applied Element Modelling of the Dynamic Response of a Full-Scale Clay Brick Masonry Building Specimen with Flexible Diaphragms},\njournal = {International Journal of Architectural Heritage},\nauthor = {Malomo, Daniele and Pinho, Rui and Penna, Andrea},\nvolume = {14},\nnumber = {10},\nyear = {2020},\npages = {1484 - 1501},\nissn = {15583058},\nabstract = {Structural design of unreinforced masonry buildings in The Netherlands, recently exposed to low-intensity ground motions induced by gas extraction, was not originally conceived for earthquake-resistance. Indeed, the presence of both large openings and flexible diaphragms, and the lack of any specific seismic consideration or detailing significantly increase their vulnerability towards horizontal loading. In this paper, the Applied Element Method (AEM), which explicitly represents the discrete nature of masonry, is used to simulate the shake-table response of a full-scale building specimen representative of a typical Dutch detached house made of unreinforced solid clay-brick masonry. Using this modelling strategy, the damage evolution, as well as both global failure mode and hysteretic behaviour, are described. The results show a good agreement with the experimentally observed response, confirming the capabilities of the AEM in reproducing effectively the behaviour of masonry structures, whilst simultaneously keeping computational costs within acceptable limits for this type of detailed modelling.<br/> © 2019 Taylor & Francis.},\nkey = {Numerical methods},\n%keywords = {Earthquake engineering;Earthquakes;Structural design;Diaphragms;Numerical models;Brick;},\n%note = {Computational costs;Element method;Flexible diaphragms;Hysteretic behaviour;Modelling strategies;Shake table;Unreinforced masonry;Unreinforced masonry building;},\nURL = {http://dx.doi.org/10.1080/15583058.2019.1616004},\n} \n\n\n
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\n Structural design of unreinforced masonry buildings in The Netherlands, recently exposed to low-intensity ground motions induced by gas extraction, was not originally conceived for earthquake-resistance. Indeed, the presence of both large openings and flexible diaphragms, and the lack of any specific seismic consideration or detailing significantly increase their vulnerability towards horizontal loading. In this paper, the Applied Element Method (AEM), which explicitly represents the discrete nature of masonry, is used to simulate the shake-table response of a full-scale building specimen representative of a typical Dutch detached house made of unreinforced solid clay-brick masonry. Using this modelling strategy, the damage evolution, as well as both global failure mode and hysteretic behaviour, are described. The results show a good agreement with the experimentally observed response, confirming the capabilities of the AEM in reproducing effectively the behaviour of masonry structures, whilst simultaneously keeping computational costs within acceptable limits for this type of detailed modelling.
© 2019 Taylor & Francis.\n
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\n \n\n \n \n \n \n \n \n Numerical simulation of free-surface flow and convection heat transfer using a modified Weakly Compressible Smoothed Particle Hydrodynamics (WCSPH) method.\n \n \n \n \n\n\n \n Garoosi, F.; and Shakibaeinia, A.\n\n\n \n\n\n\n International Journal of Mechanical Sciences, 188. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20203008965973 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical simulation of free-surface flow and convection heat transfer using a modified Weakly Compressible Smoothed Particle Hydrodynamics (WCSPH) method},\njournal = {International Journal of Mechanical Sciences},\nauthor = {Garoosi, Faroogh and Shakibaeinia, Ahmad},\nvolume = {188},\nyear = {2020},\nissn = {00207403},\nabstract = {A novel Kernel Derivative-Free (KDF) Weakly-Compressible Smoothed Particle Hydrodynamics (WCSPH) model is developed for simulation of free-surface flows and convection heat transfer. A high-order Laplacian operator is developed and then applied for the approximation of the diffusion terms (e.g., viscous term, thermal diffusion, and newly additional diffusion term in the continuity equation). The transient term in Navier–Stokes equation is discretized using the third-order TVD Runge-Kutta scheme, while a stiff equation of state is employed to predict pressure field. To increase numerical accuracy, a new high-order smoothing operator in the context of the MPS description (Moving Particle Semi-implicit) is also proposed and then applied for the treatment of the buoyancy force term in the momentum equation. Furthermore, a new high-order smoothing kernel is constructed and tested via simulation of the 1D Sod shock tube problem. A series of numerical benchmark cases such as: dam break, stretching of a circular water drop, rotating square patch of fluid and natural convection heat transfer in a square enclosure are used to verify and evaluate the feasibility of the proposed models. It is found that all simulation results are in excellent agreement with the available experimental and numerical data. Capability and performance of KDF-WCSPH method in handling particulate flows with thermal convection are further demonstrated through analysis of entropy generation due to natural convection heat transfer in the three different well-known geometries including: Differentially Heated Cavity, L-shaped enclosure and horizontal annuli. Comparison with the past Finite-Volume results demonstrates that the present model can maintain stability and accuracy, which makes it a very useful tool for simulation of thermo-hydraulic problems.<br/> © 2020 Elsevier Ltd},\nkey = {Natural convection},\n%keywords = {Mathematical operators;Navier Stokes equations;Numerical methods;Laplace transforms;Enclosures;Equations of state;Hydrodynamics;Entropy;Runge Kutta methods;},\n%note = {Continuity equations;Differentially heated cavity;Moving particle semi-implicit;Numerical benchmark;Runge-kutta schemes;Shock-tube problem;Smoothed particle hydrodynamics;Thermal convections;},\nURL = {http://dx.doi.org/10.1016/j.ijmecsci.2020.105940},\n} \n\n\n\n
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\n A novel Kernel Derivative-Free (KDF) Weakly-Compressible Smoothed Particle Hydrodynamics (WCSPH) model is developed for simulation of free-surface flows and convection heat transfer. A high-order Laplacian operator is developed and then applied for the approximation of the diffusion terms (e.g., viscous term, thermal diffusion, and newly additional diffusion term in the continuity equation). The transient term in Navier–Stokes equation is discretized using the third-order TVD Runge-Kutta scheme, while a stiff equation of state is employed to predict pressure field. To increase numerical accuracy, a new high-order smoothing operator in the context of the MPS description (Moving Particle Semi-implicit) is also proposed and then applied for the treatment of the buoyancy force term in the momentum equation. Furthermore, a new high-order smoothing kernel is constructed and tested via simulation of the 1D Sod shock tube problem. A series of numerical benchmark cases such as: dam break, stretching of a circular water drop, rotating square patch of fluid and natural convection heat transfer in a square enclosure are used to verify and evaluate the feasibility of the proposed models. It is found that all simulation results are in excellent agreement with the available experimental and numerical data. Capability and performance of KDF-WCSPH method in handling particulate flows with thermal convection are further demonstrated through analysis of entropy generation due to natural convection heat transfer in the three different well-known geometries including: Differentially Heated Cavity, L-shaped enclosure and horizontal annuli. Comparison with the past Finite-Volume results demonstrates that the present model can maintain stability and accuracy, which makes it a very useful tool for simulation of thermo-hydraulic problems.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Wavelet Transformation Approach for Damage Identification of Steel Structure Model.\n \n \n \n \n\n\n \n Patel, C.; Panigrahi, S.; Chourasia, A.; Roy, T. B.; Bagchi, A.; and Tirca, L.\n\n\n \n\n\n\n In pages 245 - 257, Rourkela, India, 2020. \n \n\n\n\n
\n\n\n\n \n \n \"WaveletPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20223112481760 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wavelet Transformation Approach for Damage Identification of Steel Structure Model},\njournal = {Lecture Notes in Mechanical Engineering},\nauthor = {Patel, Chandrabhan and Panigrahi, S.K. and Chourasia, Ajay and Roy, Timir B. and Bagchi, Ashutosh and Tirca, Lucia},\nyear = {2020},\npages = {245 - 257},\nissn = {21954356},\naddress = {Rourkela, India},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents an application of wavelet analysis for damage detection in steel structures. Wavelet analysis is a new mathematical and advanced signal processing tool that can be used to analyze the vibration data and the damage in the structure can be identified. It is found that spikes in the wavelet occurs either by damage or striking on the structure. The observed spikes in wavelet pattern are used for damage detection in multistory structures. A software application is developed that can process up to six sensors data and can locate the exact location of the damage. The application of Continuous Daubechies (Db8) wavelet in damage identification proved to be more robust in detecting the damage location. The experiments were conducted on a five-story steel structure at the CSIR-CBRI, Roorkee, India to verify the proposed method using two types of accelerometers.<br/></div> © 2020, Springer Nature Singapore Pte Ltd.},\nURL = {http://dx.doi.org/10.1007/978-981-15-0287-3_18},\n} \n\n\n
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This paper presents an application of wavelet analysis for damage detection in steel structures. Wavelet analysis is a new mathematical and advanced signal processing tool that can be used to analyze the vibration data and the damage in the structure can be identified. It is found that spikes in the wavelet occurs either by damage or striking on the structure. The observed spikes in wavelet pattern are used for damage detection in multistory structures. A software application is developed that can process up to six sensors data and can locate the exact location of the damage. The application of Continuous Daubechies (Db8) wavelet in damage identification proved to be more robust in detecting the damage location. The experiments were conducted on a five-story steel structure at the CSIR-CBRI, Roorkee, India to verify the proposed method using two types of accelerometers.
© 2020, Springer Nature Singapore Pte Ltd.\n
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\n \n\n \n \n \n \n \n \n A Probabilistic Stress - Life Model for Fretting Fatigue of Aluminum Conductor Steel Reinforced Cable - Clamp Systems.\n \n \n \n \n\n\n \n Thomas, O. O.; Chouinard, L. E.; and Langlois, S.\n\n\n \n\n\n\n In pages 704 - 715, Stavanger, Norway, 2020. \n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20223112502006 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Probabilistic Stress - Life Model for Fretting Fatigue of Aluminum Conductor Steel Reinforced Cable - Clamp Systems},\njournal = {Lecture Notes in Mechanical Engineering},\nauthor = {Thomas, Oluwafemi O. and Chouinard, Luc E. and Langlois, Sebastien},\nyear = {2020},\npages = {704 - 715},\nissn = {21954356},\naddress = {Stavanger, Norway},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents a probabilistic analysis of a compilation of test data on the fatigue endurance of Aluminum Conductor Steel Reinforced (ACSR) cable–clamp systems. A brief review of the testing and measurement methods used to perform fatigue tests on conductors are described. Theoretical arguments based on the properties of extreme value distributions and random vibrations are presented which indicate that a Weibull S – N model is the most appropriate among models previously proposed in the literature for fatigue of ACSR cable – clamp systems. Predictions from the model are presented in terms of idealized stresses using bending amplitudes. Statistical tests are performed to verify that the Weibull distribution provides a good fit to the conductor fretting fatigue data. Validation datasets independent of the training dataset are used to evaluate the predictive ability of the model. The proposed probabilistic model is shown to be a reliable means of predicting the residual life of conductors subjected to aeolian vibrations for transmission line management and conductor replacement planning.<br/></div> © 2020, Springer Nature Switzerland AG.},\nURL = {http://dx.doi.org/10.1007/978-3-030-48021-9_78},\n} \n\n\n
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This paper presents a probabilistic analysis of a compilation of test data on the fatigue endurance of Aluminum Conductor Steel Reinforced (ACSR) cable–clamp systems. A brief review of the testing and measurement methods used to perform fatigue tests on conductors are described. Theoretical arguments based on the properties of extreme value distributions and random vibrations are presented which indicate that a Weibull S – N model is the most appropriate among models previously proposed in the literature for fatigue of ACSR cable – clamp systems. Predictions from the model are presented in terms of idealized stresses using bending amplitudes. Statistical tests are performed to verify that the Weibull distribution provides a good fit to the conductor fretting fatigue data. Validation datasets independent of the training dataset are used to evaluate the predictive ability of the model. The proposed probabilistic model is shown to be a reliable means of predicting the residual life of conductors subjected to aeolian vibrations for transmission line management and conductor replacement planning.
© 2020, Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Assessing the Condition of Reinforced Concrete Bridge Using Visual Inspection Ratings.\n \n \n \n \n\n\n \n Bah, A. S.; Sanchez, T.; Zhang, Y.; Sasai, K.; Conciatori, D.; Chouinard, L.; Power, G. J.; and Zufferey, N.\n\n\n \n\n\n\n In pages 693 - 700, Virtual, Online, Spain, 2020. \n \n\n\n\n
\n\n\n\n \n \n \"AssessingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20221011762302 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessing the Condition of Reinforced Concrete Bridge Using Visual Inspection Ratings},\njournal = {Current Topics and Trends on Durability of Building Materials and Components - Proceedings of the 15th International Conference on Durability of Building Materials and Components, DBMC 2020},\nauthor = {Bah, Abdoul S. and Sanchez, Thomas and Zhang, Yan and Sasai, Kotaro and Conciatori, David and Chouinard, Luc and Power, Gabriel J. and Zufferey, Nicolas},\nyear = {2020},\npages = {693 - 700},\naddress = {Virtual, Online, Spain},\nabstract = {<div data-language="eng" data-ev-field="abstract">The evolution of the state of a structure is characterized by deterioration. This is mainly due to corrosion of the steel reinforcement and damage from mechanical solicitations. The maintenance of existing infrastructures involves a good grasp of their condition and a high level of expertise on the part of the project managers. An accurate assessment of the bridge state condition is required to plan maintenance and repair activities for better durability, and to maintain the level of service of the road network. In this paper, an effective management framework for bridge is proposed using field observations from visual inspections. Each element of the bridge was evaluated separately by a visual inspection from which were derived ratings to quantify the structural performance and the material condition. The element ratings were also combined to obtain an overall rating for the bridge considering its defects and impact on the behavior of the complete structure. The modelling approach proposed in this work can better represent the deterioration of concrete-built bridges when the defect is visible. A representative structure in Quebec was studied to illustrate how to apply the methodology for the assessment of a real structure condition at specific times.<br/></div> © The authors.},\nkey = {Durability},\n%keywords = {Repair;Reinforced concrete;Condition monitoring;Deterioration;Inspection;Condition based maintenance;Defects;Steel corrosion;},\n%note = {Assessment;Condition;Level of Service;Mechanical solicitations;Project managers;Reinforced concrete bridge;State;Steel damages;Steel reinforcements;Visual inspection;},\nURL = {http://dx.doi.org/10.23967/dbmc.2020.010},\n} \n\n\n
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\n
The evolution of the state of a structure is characterized by deterioration. This is mainly due to corrosion of the steel reinforcement and damage from mechanical solicitations. The maintenance of existing infrastructures involves a good grasp of their condition and a high level of expertise on the part of the project managers. An accurate assessment of the bridge state condition is required to plan maintenance and repair activities for better durability, and to maintain the level of service of the road network. In this paper, an effective management framework for bridge is proposed using field observations from visual inspections. Each element of the bridge was evaluated separately by a visual inspection from which were derived ratings to quantify the structural performance and the material condition. The element ratings were also combined to obtain an overall rating for the bridge considering its defects and impact on the behavior of the complete structure. The modelling approach proposed in this work can better represent the deterioration of concrete-built bridges when the defect is visible. A representative structure in Quebec was studied to illustrate how to apply the methodology for the assessment of a real structure condition at specific times.
© The authors.\n
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\n \n\n \n \n \n \n \n \n Optimisation of microbially induced calcite precipitation protocol against erosion.\n \n \n \n \n\n\n \n Haouzi, F. Z.; Esnault-Filet, A.; and Courcelles, B.\n\n\n \n\n\n\n Environmental Geotechnics, 10(4): 229 - 240. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"OptimisationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214711197048 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Optimisation of microbially induced calcite precipitation protocol against erosion},\njournal = {Environmental Geotechnics},\nauthor = {Haouzi, Fatima Zahra and Esnault-Filet, Annette and Courcelles, Benoit},\nvolume = {10},\nnumber = {4},\nyear = {2020},\npages = {229 - 240},\nissn = {2051803X},\nabstract = {<div data-language="eng" data-ev-field="abstract">Five strategies of microbially induced calcite precipitation (MICP) are suggested to improve the uniformity of treatment and enhance the erosional/hydraulic response of internally unstable and poorly graded soils. The treatment consisted of the injection of a bacterial suspension and a cementation solution. The volume of the injected bacterial suspension varied from 0·3 to one pore volume, while the concentration of the cementation solution (urea/calcium chloride (CaCl2)) varied from 0·35 to 0·75 M. The biotreatment of sand columns (φ = 160 mm and h = 100 mm) was conducted in either one, two or three stages, with or without a low-salinity fixation solution. The biotreated specimens were then submitted to an erosion test, and the results show that alternating injection of reagents in three stages enhances the uniformity of biomineralisation, as the hydraulic conductivity is constant from the top to the bottom of the specimens. This protocol also prevents internal erosion as the critical hydraulic gradient (i cr) is equal to 10 and the cumulative fine loss (M e) does not exceed 63 g/m2. Finally, the use of a fixation solution prevents any clogging near the injection point and stimulates the bacterial transport in the soil.<br/></div> © 2023 ICE Publishing: All rights reserved.},\nkey = {Porous materials},\n%keywords = {Calcite;Calcium carbonate;Cementing (shafts);Chlorine compounds;Erosion;Precipitation (chemical);Suspensions (fluids);Urea;},\n%note = {Bacterial suspensions;Biotreatments;Calcite precipitation;Hydraulic response;Low salinity;Optimisations;Pore volume;Porous medium;Porous-medium characterization;Sand columns;},\nURL = {http://dx.doi.org/10.1680/jenge.19.00083},\n} \n\n\n
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Five strategies of microbially induced calcite precipitation (MICP) are suggested to improve the uniformity of treatment and enhance the erosional/hydraulic response of internally unstable and poorly graded soils. The treatment consisted of the injection of a bacterial suspension and a cementation solution. The volume of the injected bacterial suspension varied from 0·3 to one pore volume, while the concentration of the cementation solution (urea/calcium chloride (CaCl2)) varied from 0·35 to 0·75 M. The biotreatment of sand columns (φ = 160 mm and h = 100 mm) was conducted in either one, two or three stages, with or without a low-salinity fixation solution. The biotreated specimens were then submitted to an erosion test, and the results show that alternating injection of reagents in three stages enhances the uniformity of biomineralisation, as the hydraulic conductivity is constant from the top to the bottom of the specimens. This protocol also prevents internal erosion as the critical hydraulic gradient (i cr) is equal to 10 and the cumulative fine loss (M e) does not exceed 63 g/m2. Finally, the use of a fixation solution prevents any clogging near the injection point and stimulates the bacterial transport in the soil.
© 2023 ICE Publishing: All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Flexible decision analysis procedures for optimizing the sustainability of ageing infrastructure under climate change.\n \n \n \n \n\n\n \n Zhang, Y.; Chouinard, L. E.; Power, G. J.; Tandja M, C. D.; and Bastien, J.\n\n\n \n\n\n\n Sustainable and Resilient Infrastructure, 5(1-2): 90 - 101. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"FlexiblePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20214311068051 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Flexible decision analysis procedures for optimizing the sustainability of ageing infrastructure under climate change},\njournal = {Sustainable and Resilient Infrastructure},\nauthor = {Zhang, Yan and Chouinard, Luc E. and Power, Gabriel J. and Tandja M, Charli D. and Bastien, Josee},\nvolume = {5},\nnumber = {1-2},\nyear = {2020},\npages = {90 - 101},\nissn = {23789689},\nabstract = {<div data-language="eng" data-ev-field="abstract">Currently, there is significant interest in ensuring the sustainability and serviceability of infrastructure systems in the context of climate change. Indeed, a large proportion of existing structures already are in an advanced state of deterioration, thus affecting the sustainability and usefulness of these structures, and highlighting the need for better planning and decision analysis tools. Such tools would benefit from improved models to predict the residual life of structures, to estimate benefits derived from infrastructures, to account for uncertainties associated with physical and financial processes, and to provide more flexibility in decision-making strategies. These concepts are investigated through application of a risk-based decision-making model for reinforced concrete bridge decks in Montreal to estimate the optimal timing for deck repairs. A probabilistic deterioration model is used to predict the residual life of concrete decks as a function of exposure to de-icing salts using historical data and predictions from climate change scenarios. Historical data are used to validate model assumptions by comparing predicted condition states to observations from periodic inspections, while the climate scenarios are used to evaluate the impact of climate change on deterioration rates assuming that current deck design and de-icing salt management strategies are not modified. In this instance, the optimal timing for the first major repair is influenced by the uncertainty involved with climate change predictions and the future availability of funds, while ensuring the safety of users and the required level of service. The proposed framework, based on a cost-benefit analysis, is applicable to any infrastructure project.<br/></div> © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Deterioration},\n%keywords = {Cost benefit analysis;Climate models;Climate change;Forecasting;Sustainable development;Uncertainty analysis;Reinforced concrete;Risk perception;},\n%note = {Changing climate;Climate change prediction;Climate change scenarios;Decision-making strategies;infrastructure;Infrastructure project;Optimal strategies;Risk based decision making;},\nURL = {http://dx.doi.org/10.1080/23789689.2018.1448665},\n} \n\n\n
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Currently, there is significant interest in ensuring the sustainability and serviceability of infrastructure systems in the context of climate change. Indeed, a large proportion of existing structures already are in an advanced state of deterioration, thus affecting the sustainability and usefulness of these structures, and highlighting the need for better planning and decision analysis tools. Such tools would benefit from improved models to predict the residual life of structures, to estimate benefits derived from infrastructures, to account for uncertainties associated with physical and financial processes, and to provide more flexibility in decision-making strategies. These concepts are investigated through application of a risk-based decision-making model for reinforced concrete bridge decks in Montreal to estimate the optimal timing for deck repairs. A probabilistic deterioration model is used to predict the residual life of concrete decks as a function of exposure to de-icing salts using historical data and predictions from climate change scenarios. Historical data are used to validate model assumptions by comparing predicted condition states to observations from periodic inspections, while the climate scenarios are used to evaluate the impact of climate change on deterioration rates assuming that current deck design and de-icing salt management strategies are not modified. In this instance, the optimal timing for the first major repair is influenced by the uncertainty involved with climate change predictions and the future availability of funds, while ensuring the safety of users and the required level of service. The proposed framework, based on a cost-benefit analysis, is applicable to any infrastructure project.
© 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n A non-linear interface model for monotonic shear coupling in granular soil-structure interaction problems.\n \n \n \n \n\n\n \n Saberi, M.; Annan, C.; and Konrad, J.\n\n\n \n\n\n\n Geotechnique Letters, 10(2): 336 - 345. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20213710885466 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A non-linear interface model for monotonic shear coupling in granular soil-structure interaction problems},\njournal = {Geotechnique Letters},\nauthor = {Saberi, Miad and Annan, Charles-Darwin and Konrad, Jean-Marie},\nvolume = {10},\nnumber = {2},\nyear = {2020},\npages = {336 - 345},\nissn = {20452543},\nabstract = {<div data-language="eng" data-ev-field="abstract">The accurate prediction of the behaviour of soil-structure interfaces that accounts for shear coupling is of concern in the design and analysis of soil-structure interaction problems. In this study, an interface constitutive model capable of simulating the non-linear behaviour of granular soil-structure interface systems under three-dimensional loading conditions is proposed. The proposed constitutive model is a state-dependent elasto-plastic model, and it is formulated in the framework of two-surface plasticity and critical state soil mechanics. The interface model considers the effect of shear coupling and is capable of predicting the monotonic behaviour of soil-structure interfaces over a wide range of normal and shear stresses, and under different stress paths using a single set of model parameters. It also captures other complex behaviour characteristics such as strain hardening and softening, volumetric compaction and dilation, and phase transformation responses of granular soil-structure interfaces under orthogonal shear application. The performance of the proposed constitutive model is evaluated by comparing its predictions for both gravelly and sandy soil-structure interfaces with available experimental results.<br/></div> © 2020 ICE Publishing: all rights reserved.},\nkey = {Plasticity},\n%keywords = {Forecasting;Critical current density (superconductivity);Elasticity;Shear stress;Strain hardening;Topology;Constitutive models;Shear flow;Soil structure interactions;Soils;},\n%note = {Critical state soil mechanics;Elasto-plastic models;Monotonic behaviour;Nonlinear behaviours;Normal and shear stress;Soil structure interface;Three-dimensional loadings;Two-surface plasticity;},\nURL = {http://dx.doi.org/10.1680/jgele.19.00041},\n} \n\n\n
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The accurate prediction of the behaviour of soil-structure interfaces that accounts for shear coupling is of concern in the design and analysis of soil-structure interaction problems. In this study, an interface constitutive model capable of simulating the non-linear behaviour of granular soil-structure interface systems under three-dimensional loading conditions is proposed. The proposed constitutive model is a state-dependent elasto-plastic model, and it is formulated in the framework of two-surface plasticity and critical state soil mechanics. The interface model considers the effect of shear coupling and is capable of predicting the monotonic behaviour of soil-structure interfaces over a wide range of normal and shear stresses, and under different stress paths using a single set of model parameters. It also captures other complex behaviour characteristics such as strain hardening and softening, volumetric compaction and dilation, and phase transformation responses of granular soil-structure interfaces under orthogonal shear application. The performance of the proposed constitutive model is evaluated by comparing its predictions for both gravelly and sandy soil-structure interfaces with available experimental results.
© 2020 ICE Publishing: all rights reserved.\n
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\n \n\n \n \n \n \n \n Parameters affecting the axial load response of ultra high performance concrete (UHPC) columns.\n \n \n \n\n\n \n Shin, H.; Aoude, H.; and Mitchell, D.\n\n\n \n\n\n\n In volume SP-341, pages 48 - 70, Las Vegas, NV, United states, 2020. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20212910652756 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Parameters affecting the axial load response of ultra high performance concrete (UHPC) columns},\njournal = {American Concrete Institute, ACI Special Publication},\nauthor = {Shin, Hyun-Oh and Aoude, Hassan and Mitchell, Denis},\nvolume = {SP-341},\nyear = {2020},\npages = {48 - 70},\nissn = {01932527},\naddress = {Las Vegas, NV, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Ultra-high-performance concrete (UHPC) is an innovative material that exhibits high compressive and tensile strength as well as excellent durability. The provision of fibers in UHPC results in improved ductility and increased toughness when compared to conventional high-strength concrete. These properties make UHPC welladapted for use in the columns of high-rise buildings and heavily-loaded bridges. This paper summarizes the results from a database of tests examining the effects of various design parameters on the axial load performance of UHPC columns. Experimental results illustrating the effects of concrete type (UHPC vs. high-strength and ultra-high-strength concrete), UHPC compressive strength and transverse reinforcement detailing are presented. The results show that the use of UHPC in columns resulted in increased load carrying capacity and post peak ductility when compared to conventional high-strength or ultra-high-strength concrete due to the ability of steel fibers to delay cover spalling. However, greater amounts of confinement reinforcement were required to achieve the same level of axial load performance as the UHPC compressive strength was increased from 150 to 180 MPa. The results also showed that the amount, spacing, and configuration of transverse reinforcement, as well as their interaction significantly affected the axial load response of UHPC columns. However, increasing the amount of transverse reinforcement had the most pronounced effect on post-peak behavior. The effect of the confinement provisions in current codes (CSA A23.3-14 and ACI-318-14) on the ductility of the UHPC columns was also investigated. Based on the results, an alternative confinement expression for achieving ductile behavior in UHPC columns was proposed.<br/></div> © 2020 American Concrete Institute. All rights reserved.},\nkey = {Tensile strength},\n%keywords = {Axial loads;High performance concrete;Compressive strength;Steel fibers;Ductility;Tall buildings;High strength steel;Reinforced concrete;},\n%note = {Compressive and tensile strengths;Confinement reinforcement;High strength concretes;Innovative materials;Post-peak behaviors;Transverse reinforcement;Ultra high performance concretes (UHPC);Ultra high strength concretes;},\n} \n\n\n
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Ultra-high-performance concrete (UHPC) is an innovative material that exhibits high compressive and tensile strength as well as excellent durability. The provision of fibers in UHPC results in improved ductility and increased toughness when compared to conventional high-strength concrete. These properties make UHPC welladapted for use in the columns of high-rise buildings and heavily-loaded bridges. This paper summarizes the results from a database of tests examining the effects of various design parameters on the axial load performance of UHPC columns. Experimental results illustrating the effects of concrete type (UHPC vs. high-strength and ultra-high-strength concrete), UHPC compressive strength and transverse reinforcement detailing are presented. The results show that the use of UHPC in columns resulted in increased load carrying capacity and post peak ductility when compared to conventional high-strength or ultra-high-strength concrete due to the ability of steel fibers to delay cover spalling. However, greater amounts of confinement reinforcement were required to achieve the same level of axial load performance as the UHPC compressive strength was increased from 150 to 180 MPa. The results also showed that the amount, spacing, and configuration of transverse reinforcement, as well as their interaction significantly affected the axial load response of UHPC columns. However, increasing the amount of transverse reinforcement had the most pronounced effect on post-peak behavior. The effect of the confinement provisions in current codes (CSA A23.3-14 and ACI-318-14) on the ductility of the UHPC columns was also investigated. Based on the results, an alternative confinement expression for achieving ductile behavior in UHPC columns was proposed.
© 2020 American Concrete Institute. All rights reserved.\n
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\n \n\n \n \n \n \n \n An analog circuit technique to improve a geophone frequency response for application as vibration sensors.\n \n \n \n\n\n \n Hakimitoroghi, N.; Raut, R.; Mirshafiei, M.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2020-October, Virtual, Online, 2020. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20212810619116 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An analog circuit technique to improve a geophone frequency response for application as vibration sensors},\njournal = {Proceedings - IEEE International Symposium on Circuits and Systems},\nauthor = {Hakimitoroghi, Navid and Raut, Rabin and Mirshafiei, Mehrdad and Bagchi, Ashutosh},\nvolume = {2020-October},\nyear = {2020},\nissn = {02714310},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">Vibration sensors find use in monitoring and measuring vibrations of buildings, bridges and in seismological sciences. Geophones are one of the commonly used sensors for such applications. However, geophones have a natural frequency response like that of a high-pass filter. In the past, several innovations have been introduced to extend the −3 dB corner frequency of the geophone to capture the natural frequencies of a building around 1 Hz. These involved modifying the physical construction of the geophone, and/or introducing digital signal conditioning which is cost intensive. We investigated several analog circuit techniques such that the overall electrical response of the geophone approximates to a low-pass filter response. In one approach the device is followed by a cascade of an ideal integrator and a lossy integrator. This eliminates the zeros of the device while preserving the natural low-frequency pole of the device. It is desirable to create a low-frequency pole independent of the natural pole of the geophone. In order to achieve this goal we used multi-loop feedback method which affords to a low-pass characteristic where the pole frequency becomes different from the natural pole frequency of the geophone. In the following theoretical foundations for two techniques are presented. Validity of the multi-loop feedback technique has been established by numerical simulations and verified by lab-bench experiments.<br/></div> © 2020 IEEE},\nkey = {Frequency response},\n%keywords = {Analog circuits;Low pass filters;Timing circuits;Poles;Feedback;High pass filters;Natural frequencies;},\n%note = {Bench experiment;Circuit techniques;Corner frequency;Electrical response;Lossy integrators;Multi-loop feedbacks;Theoretical foundations;Vibration sensors;},\n} \n\n\n
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Vibration sensors find use in monitoring and measuring vibrations of buildings, bridges and in seismological sciences. Geophones are one of the commonly used sensors for such applications. However, geophones have a natural frequency response like that of a high-pass filter. In the past, several innovations have been introduced to extend the −3 dB corner frequency of the geophone to capture the natural frequencies of a building around 1 Hz. These involved modifying the physical construction of the geophone, and/or introducing digital signal conditioning which is cost intensive. We investigated several analog circuit techniques such that the overall electrical response of the geophone approximates to a low-pass filter response. In one approach the device is followed by a cascade of an ideal integrator and a lossy integrator. This eliminates the zeros of the device while preserving the natural low-frequency pole of the device. It is desirable to create a low-frequency pole independent of the natural pole of the geophone. In order to achieve this goal we used multi-loop feedback method which affords to a low-pass characteristic where the pole frequency becomes different from the natural pole frequency of the geophone. In the following theoretical foundations for two techniques are presented. Validity of the multi-loop feedback technique has been established by numerical simulations and verified by lab-bench experiments.
© 2020 IEEE\n
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\n \n\n \n \n \n \n \n \n Thermo-Chemo-Poromechanical Modeling of the Anode Mixture during the Baking Process: Constitutive Laws and Governing Equations.\n \n \n \n \n\n\n \n Chen, B.; Chaouki, H.; Picard, D.; Ziegler, D.; Alamdari, H.; and Fafard, M.\n\n\n \n\n\n\n Journal of Applied Mechanics, Transactions ASME, 87(1). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"Thermo-Chemo-PoromechanicalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20212110387119 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Thermo-Chemo-Poromechanical Modeling of the Anode Mixture during the Baking Process: Constitutive Laws and Governing Equations},\njournal = {Journal of Applied Mechanics, Transactions ASME},\nauthor = {Chen, Bowen and Chaouki, Hicham and Picard, Donald and Ziegler, Donald and Alamdari, Houshang and Fafard, Mario},\nvolume = {87},\nnumber = {1},\nyear = {2020},\nissn = {00218936},\nabstract = {<div data-language="eng" data-ev-field="abstract">Aluminum is reduced from alumina by the Hall-Héroult electrolysis process in which the anode is utilized as the positive electrode. The quality of the prebaked anode plays a crucial rule in the efficiency of the aluminum electrolysis process. To produce high-quality anodes in the aluminum industry, the anode baking process calls for a deep understanding of mechanisms that govern the evolution of the anode mixture properties under the high-temperature condition. Therefore, the aim of this paper is to establish a thermo-chemo-poromechanical model for the baking anode by using the theory of reactive porous media based on the theory of mixtures within the thermodynamic framework. For this purpose, an internal state variable called "shrinking index" is defined to characterize the chemical progress of the pitch pyrolysis in the anode skeleton, and the Clausius-Duhem inequality is developed according to the Lagrangian formalism. By introducing a reduced Green-Lagrange strain tensor, a Lagrangian free energy is formulated to found a set of state equations. Then, the thermodynamic dissipation for this pyrolyzing solid-gas mixture is derived, and a constitutive model linking the chemical pyrolysis with the mechanical behavior is achieved. A dissipation potential is consistently defined to ensure the non-negativeness of the thermodynamic dissipation and to obtain the constitutive laws for viscous behaviors. Field equations governing the volatile diffusion and the heat transfer through the draining mixture body are derived from the entropy balance.<br/></div> © 2021 Royal Society of Chemistry. All rights reserved.},\nkey = {Porous materials},\n%keywords = {Aluminum;Anodes;Pyrolysis;Alumina;Electrolysis;Equations of state;Free energy;Lagrange multipliers;Heat transfer;Aluminum oxide;},\n%note = {Aluminum electrolysis;Clausius-Duhem inequality;Dissipation potential;Green-Lagrange strain tensors;High temperature condition;Internal state variables;Lagrangian formalism;Thermodynamic framework;},\nURL = {http://dx.doi.org/10.1115/1.4044665},\n} \n\n\n
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Aluminum is reduced from alumina by the Hall-Héroult electrolysis process in which the anode is utilized as the positive electrode. The quality of the prebaked anode plays a crucial rule in the efficiency of the aluminum electrolysis process. To produce high-quality anodes in the aluminum industry, the anode baking process calls for a deep understanding of mechanisms that govern the evolution of the anode mixture properties under the high-temperature condition. Therefore, the aim of this paper is to establish a thermo-chemo-poromechanical model for the baking anode by using the theory of reactive porous media based on the theory of mixtures within the thermodynamic framework. For this purpose, an internal state variable called \"shrinking index\" is defined to characterize the chemical progress of the pitch pyrolysis in the anode skeleton, and the Clausius-Duhem inequality is developed according to the Lagrangian formalism. By introducing a reduced Green-Lagrange strain tensor, a Lagrangian free energy is formulated to found a set of state equations. Then, the thermodynamic dissipation for this pyrolyzing solid-gas mixture is derived, and a constitutive model linking the chemical pyrolysis with the mechanical behavior is achieved. A dissipation potential is consistently defined to ensure the non-negativeness of the thermodynamic dissipation and to obtain the constitutive laws for viscous behaviors. Field equations governing the volatile diffusion and the heat transfer through the draining mixture body are derived from the entropy balance.
© 2021 Royal Society of Chemistry. All rights reserved.\n
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\n \n\n \n \n \n \n \n Mechanically ventilated double skin Façade with semi-transparent photovoltaics, implementing electrical storage and heat pumps to reduce peak demand.\n \n \n \n\n\n \n Ioannidis, Z.; Athienitis, A. K.; Stathopoulos, T.; and Buonomano, A.\n\n\n \n\n\n\n In volume 126, pages 149 - 156, Virtual, Online, 2020. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20212010358190 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Mechanically ventilated double skin Façade with semi-transparent photovoltaics, implementing electrical storage and heat pumps to reduce peak demand},\njournal = {ASHRAE Transactions},\nauthor = {Ioannidis, Zisis and Athienitis, Andreas K. and Stathopoulos, Ted and Buonomano, Anamaria},\nvolume = {126},\nyear = {2020},\npages = {149 - 156},\nissn = {00012505},\naddress = {Virtual, Online},\nabstract = {<div data-language="eng" data-ev-field="abstract">Semi-Transparent Photovoltaics (STPV) can be integrated on Double Skin Facades (DSF) to enhance the electrical and thermal performance of a building. In a mechanically ventilated DSF, the heat extracted from the DSF can be used to increase the Coefficient of Performance (COP) of a heat pump based mechanical system, or it can be introduced directly to the building. In addition, the STPV integrated on the outermost layer of the DSF, can control the solar gains, may allow controlled levels of the daylight into the zone and creates a microclimate around the building. In the present study we investigate the mismatch between the electricity production by the STPV and the electricity needed for heating and lighting by the adjacent building zones and develop ways of reducing this mismatch. A DSF-STPV combination, coupled with battery storage within the building, is considered in order to shift the peak demand of the building and provide better matching of generation and loads. Because STPV is integrated in the DSF, the heating demand during the day decreases as the building receives solar heat gains and at the same time produces electricity. This electricity produced by the STPV can be stored in a battery and later be used at the grid peak hours to reduce the peak demand by operating the heat pump. The preheated air, that is flowing within the cavity of the DSF-STPV, assists an air sourced heat pump to increase its COP and the heat produced is used to keep the building warm during the grid peak hours when the set point is reduced. With the use of such a predictive heating strategy, the peak demand of the building can coincide with the peak of the solar electricity production resulting in more than 80% reduction in the electricity consumption during the peak demand hours of the grid.<br/></div> © 2020 Amer. Soc. Heating, Ref. Air-Conditoning Eng. Inc.. All rights reserved.},\nkey = {Electric power transmission networks},\n%keywords = {Buildings;Electric power generation;Pumps;Passive solar;Electric batteries;},\n%note = {Adjacent buildings;Coefficient of performances (COP);Double-skin facades;Electricity production;Electricity-consumption;Mechanical systems;Solar electricity;Thermal Performance;},\n} \n\n\n
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Semi-Transparent Photovoltaics (STPV) can be integrated on Double Skin Facades (DSF) to enhance the electrical and thermal performance of a building. In a mechanically ventilated DSF, the heat extracted from the DSF can be used to increase the Coefficient of Performance (COP) of a heat pump based mechanical system, or it can be introduced directly to the building. In addition, the STPV integrated on the outermost layer of the DSF, can control the solar gains, may allow controlled levels of the daylight into the zone and creates a microclimate around the building. In the present study we investigate the mismatch between the electricity production by the STPV and the electricity needed for heating and lighting by the adjacent building zones and develop ways of reducing this mismatch. A DSF-STPV combination, coupled with battery storage within the building, is considered in order to shift the peak demand of the building and provide better matching of generation and loads. Because STPV is integrated in the DSF, the heating demand during the day decreases as the building receives solar heat gains and at the same time produces electricity. This electricity produced by the STPV can be stored in a battery and later be used at the grid peak hours to reduce the peak demand by operating the heat pump. The preheated air, that is flowing within the cavity of the DSF-STPV, assists an air sourced heat pump to increase its COP and the heat produced is used to keep the building warm during the grid peak hours when the set point is reduced. With the use of such a predictive heating strategy, the peak demand of the building can coincide with the peak of the solar electricity production resulting in more than 80% reduction in the electricity consumption during the peak demand hours of the grid.
© 2020 Amer. Soc. Heating, Ref. Air-Conditoning Eng. Inc.. All rights reserved.\n
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\n \n\n \n \n \n \n \n Attachment of a crash-tested traffic barrier to a new bridge deck design in aluminium.\n \n \n \n\n\n \n Annan, C.; Cormier, M.; and Fafard, M.\n\n\n \n\n\n\n In pages 390 - 395, Christchurch, New zealand, 2020. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20211710265267 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Attachment of a crash-tested traffic barrier to a new bridge deck design in aluminium},\njournal = {IABSE Congress, Christchurch 2020: Resilient Technologies for Sustainable Infrastructure - Proceedings},\nauthor = {Annan, Charles-Darwin and Cormier, Martin and Fafard, Mario},\nyear = {2020},\npages = {390 - 395},\naddress = {Christchurch, New zealand},\nabstract = {<div data-language="eng" data-ev-field="abstract">Traffic barriers are mounted on bridges to provide a physical impassable limit to redirect errant vehicles safely into the roadway. The desired level of performance is determined by the bridge usage and the roadway configuration; higher performance levels are associated with higher risk level for impact and severity of impact. Current design standards require that the designed traffic barrier and anchorage system be tested under real crash conditions to assure crashworthiness, i.e. satisfactory interaction with design vehicles. Certain modifications to an already crash-tested and approved barrier may be permitted if it can be demonstrated by advanced analysis that they would not adversely affect the designed performance of the barrier. This study seeks to evaluate the design of a connector for attaching an already approved traffic barrier on bridge decks made from welded multi-void aluminium extrusions. The attachment design facilitates installation, and is able to absorb vehicular impact loads without any permanent plastic deformation in the aluminium deck panel.<br/></div> © 2020 IABSE Congress, Christchurch 2020: Resilient Technologies for Sustainable Infrastructure - Proceedings. All rights reserved.},\nkey = {Aluminum bridges},\n%keywords = {Crashworthiness;Aluminum;Accidents;Anchorages (foundations);Finite element method;Bridge decks;},\n%note = {Advanced analysis;Aluminium extrusions;Anchorage systems;Design standard;Performance level;Risk levels;Roadway configuration;Vehicular impacts;},\n} \n\n\n
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Traffic barriers are mounted on bridges to provide a physical impassable limit to redirect errant vehicles safely into the roadway. The desired level of performance is determined by the bridge usage and the roadway configuration; higher performance levels are associated with higher risk level for impact and severity of impact. Current design standards require that the designed traffic barrier and anchorage system be tested under real crash conditions to assure crashworthiness, i.e. satisfactory interaction with design vehicles. Certain modifications to an already crash-tested and approved barrier may be permitted if it can be demonstrated by advanced analysis that they would not adversely affect the designed performance of the barrier. This study seeks to evaluate the design of a connector for attaching an already approved traffic barrier on bridge decks made from welded multi-void aluminium extrusions. The attachment design facilitates installation, and is able to absorb vehicular impact loads without any permanent plastic deformation in the aluminium deck panel.
© 2020 IABSE Congress, Christchurch 2020: Resilient Technologies for Sustainable Infrastructure - Proceedings. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Influence of Resting Periods on the Efficiency of Microbially Induced Calcite Precipitation (MICP) in Non-saturated Conditions.\n \n \n \n \n\n\n \n Waldschmidt, J.; and Courcelles, B.\n\n\n \n\n\n\n In pages 119 - 126, Egypt, Egypt, 2020. \n \n\n\n\n
\n\n\n\n \n \n \"InfluencePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20211110066100 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Influence of Resting Periods on the Efficiency of Microbially Induced Calcite Precipitation (MICP) in Non-saturated Conditions},\njournal = {Sustainable Civil Infrastructures},\nauthor = {Waldschmidt, Jean-Baptiste and Courcelles, Benoit},\nyear = {2020},\npages = {119 - 126},\nissn = {23663405},\naddress = {Egypt, Egypt},\nabstract = {Microbially Induced Calcite Precipitation (MICP) is a relatively new soil improvement technique that has been extensively studied during the last two decades. Most of these studies have been performed in saturated conditions and only few papers deal with non-saturated conditions. In this study, we investigate two injection protocols with or without resting periods between treatment steps. The results of unconfined compression tests performed on treated samples, as well as the measurement of the calcite contents, lead to the conclusion that the resting periods improve the stiffness of the samples and the calcite content.<br/> © 2020, Springer Nature Switzerland AG.},\nkey = {Calcite},\n%keywords = {Compression testing;},\n%note = {Calcite precipitation;Non-saturated conditions;Resting period;Saturated conditions;Soil improvement;Unconfined compression tests;},\nURL = {http://dx.doi.org/10.1007/978-3-030-34206-7_9},\n} \n\n\n
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\n Microbially Induced Calcite Precipitation (MICP) is a relatively new soil improvement technique that has been extensively studied during the last two decades. Most of these studies have been performed in saturated conditions and only few papers deal with non-saturated conditions. In this study, we investigate two injection protocols with or without resting periods between treatment steps. The results of unconfined compression tests performed on treated samples, as well as the measurement of the calcite contents, lead to the conclusion that the resting periods improve the stiffness of the samples and the calcite content.
© 2020, Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Effects of slope grade on soil-pipe interaction: Full-scale experiments.\n \n \n \n \n\n\n \n Katebi, M.; Maghoul, P.; Wijewickreme, D.; and Roy, K.\n\n\n \n\n\n\n In volume 2, pages Pipeline Division - , Virtual, Online, 2020. \n \n\n\n\n
\n\n\n\n \n \n \"EffectsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20210509838600 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effects of slope grade on soil-pipe interaction: Full-scale experiments},\njournal = {Proceedings of the Biennial International Pipeline Conference, IPC},\nauthor = {Katebi, Mohammad and Maghoul, Pooneh and Wijewickreme, Dharma and Roy, Kshama},\nvolume = {2},\nyear = {2020},\npages = {Pipeline Division - },\naddress = {Virtual, Online},\nabstract = {In the current industry practice guidelines, the soil restraints to assess the behaviour of pipelines subject to permanent ground displacements are numerically characterized using independent "soil springs". These guidelines have been primarily generated by considering the typical configurations of buried pipelines in level ground. The assumption of level ground does not always hold true when assessing pipelines located on sloping ground in mountainous areas and riverbanks. This research presents the outcomes from a set of full-scale physical model tests conducted on a pipe buried in slopes. The results highlight the significance of the slope grade effects on soil-pipe interaction. The results are useful as input to modify soil springs accounting for the ground surface inclination.<br/> Copyright © 2020 ASME},\nkey = {Pipelines},\n%keywords = {Soils;Offshore oil well production;Arctic engineering;},\n%note = {Buried pipelines;Full-scale experiment;Full-scale physical modeling;Ground surfaces;Industry practices;Mountainous area;Permanent ground displacement;Soil-pipe interaction;},\nURL = {http://dx.doi.org/10.1115/IPC2020-9661},\n} \n\n\n
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\n In the current industry practice guidelines, the soil restraints to assess the behaviour of pipelines subject to permanent ground displacements are numerically characterized using independent \"soil springs\". These guidelines have been primarily generated by considering the typical configurations of buried pipelines in level ground. The assumption of level ground does not always hold true when assessing pipelines located on sloping ground in mountainous areas and riverbanks. This research presents the outcomes from a set of full-scale physical model tests conducted on a pipe buried in slopes. The results highlight the significance of the slope grade effects on soil-pipe interaction. The results are useful as input to modify soil springs accounting for the ground surface inclination.
Copyright © 2020 ASME\n
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\n \n\n \n \n \n \n \n Seismic performance of existing buildings concrete shear wall.\n \n \n \n\n\n \n Hossain, S.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2, pages 4816 - 4825, Virtual, Athens, Greece, 2020. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20210109731230 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic performance of existing buildings concrete shear wall},\njournal = {Proceedings of the International Conference on Structural Dynamic , EURODYN},\nauthor = {Hossain, S.A. and Bagchi, A.},\nvolume = {2},\nyear = {2020},\npages = {4816 - 4825},\nissn = {23119020},\naddress = {Virtual, Athens, Greece},\nabstract = {This article presents a study on the seismic performance of reinforced concrete shear wall buildings with focus on shear strength of walls that are designed using the seismic design provisions of the National Building Code of Canada. A set of buildings, four, six and eight storeys with a simple configuration and different heights have been considered here. While the static and linear dynamic analyses indicate the robustness in the design but dynamic time history analysis indicates deficiency in the shear capacity in the plastic hinge region. It is observed that a dynamic amplification factor for shear on flexural walls governs the shear demand. Here, a simple method has been proposed to estimate the amplified shear demand and to enhance shear resistance of a structural wall economically to avoid unintended shear failure.<br/> © 2020 European Association for Structural Dynamics. All rights reserved.},\nkey = {Reinforced concrete},\n%keywords = {Seismic design;Seismology;Structural dynamics;Shear walls;Seismic waves;Building codes;},\n%note = {Concrete shear wall;Dynamic amplification factors;Dynamic time history analysis;Linear dynamic analysis;National Building Code of Canada;Plastic hinge region;Reinforced concrete shear walls;Seismic Performance;},\n} \n\n\n
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\n This article presents a study on the seismic performance of reinforced concrete shear wall buildings with focus on shear strength of walls that are designed using the seismic design provisions of the National Building Code of Canada. A set of buildings, four, six and eight storeys with a simple configuration and different heights have been considered here. While the static and linear dynamic analyses indicate the robustness in the design but dynamic time history analysis indicates deficiency in the shear capacity in the plastic hinge region. It is observed that a dynamic amplification factor for shear on flexural walls governs the shear demand. Here, a simple method has been proposed to estimate the amplified shear demand and to enhance shear resistance of a structural wall economically to avoid unintended shear failure.
© 2020 European Association for Structural Dynamics. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Direct generation of floor design spectra (Fds) from uniform hazard spectra (uhs) — part i: Formulation of the method1.\n \n \n \n \n\n\n \n Asgarian, A.; and McClure, G.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 47(12): 1372 - 1386. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"DirectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204809534940 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Direct generation of floor design spectra (Fds) from uniform hazard spectra (uhs) — part i: Formulation of the method1},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Asgarian, Amin and McClure, Ghyslaine},\nvolume = {47},\nnumber = {12},\nyear = {2020},\npages = {1372 - 1386},\nissn = {03151468},\nabstract = {In most current building codes, seismic design of non-structural components (NSCs) is addressed through empirical equations that do not capture NSC response amplification due to tuning effects with higher and torsional modes of buildings and that neglect NSC damping. This work addresses these shortcomings and proposes a practical approach to generate acceleration NSC floor design spectra (FDS) in buildings directly from their corresponding uniform hazard spectra (UHS). The study is based on the linear seismic analysis of 27 reinforced concrete buildings located in Montréal, Canada, for which ambient vibration measurements (AVM) are used to determine their in situ three-dimensional dynamic characteristics. Pseudo acceleration floor response spectra (PA-FRS) are derived at every building floor for four different NSCs damping ratios. The calculated roof FRS are compared with the 5% damped UHS and a formulation is proposed to generate roof FDS for NSCs with 5% damping directly from the UHS.<br/> © 2020, Canadian Science Publishing. All rights reserved.},\nkey = {Floors},\n%keywords = {Hazards;Seismic response;Architectural design;Building codes;Concrete buildings;Vibration analysis;Seismic design;Engineering geology;Damping;Modal analysis;Reinforced concrete;Roofs;},\n%note = {Building floors;Direct generation;Empirical equations;Floor response spectrum;Non-structural components;Seismic analysis;Three-dimensional dynamics;Torsional modes;},\nURL = {http://dx.doi.org/10.1139/cjce-2018-0146},\n} \n\n\n
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\n In most current building codes, seismic design of non-structural components (NSCs) is addressed through empirical equations that do not capture NSC response amplification due to tuning effects with higher and torsional modes of buildings and that neglect NSC damping. This work addresses these shortcomings and proposes a practical approach to generate acceleration NSC floor design spectra (FDS) in buildings directly from their corresponding uniform hazard spectra (UHS). The study is based on the linear seismic analysis of 27 reinforced concrete buildings located in Montréal, Canada, for which ambient vibration measurements (AVM) are used to determine their in situ three-dimensional dynamic characteristics. Pseudo acceleration floor response spectra (PA-FRS) are derived at every building floor for four different NSCs damping ratios. The calculated roof FRS are compared with the 5% damped UHS and a formulation is proposed to generate roof FDS for NSCs with 5% damping directly from the UHS.
© 2020, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Direct generation of floor design spectra (Fds) from uniform hazard spectra (uhs) — part ii: Extension and application of the method.\n \n \n \n \n\n\n \n Asgarian, A.; and McClure, G.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 47(12): 1387 - 1400. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"DirectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204809534941 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Direct generation of floor design spectra (Fds) from uniform hazard spectra (uhs) — part ii: Extension and application of the method},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Asgarian, Amin and McClure, Ghyslaine},\nvolume = {47},\nnumber = {12},\nyear = {2020},\npages = {1387 - 1400},\nissn = {03151468},\nabstract = {This paper extends the methodology presented in the companion paper to study the effects of non-structural components’ (NSCs) damping ratio and their location in the building on the pseudo-acceleration floor response spectra (PA-FRS) of reinforced concrete buildings, and propose equations to derive floor acceleration design spectra (FDS) directly from the uniform hazard design spectra (UHS) for Montréal, Canada. The buildings used in the study are 27 existing reinforced concrete structures with braced frames and shear walls as their lateral load resisting systems: 12 are low-rise (up to 3 stories above ground), 10 are medium-rise (4 to 7 stories), and 5 are high-rise (10 to 18 stories). Based on statistical and regression analysis of floor acceleration spectra generated from linear dynamic analysis of coupled building–NSC systems, two sets of modification factors are proposed to account for floor elevation and NSC damping, applicable to the experimentally-derived FDS for roof level and 5% NSC damping. Modification factor equations could be derived only for the low-rise and medium-rise building categories, as insufficient correlation in trends could be obtained for high-rises given their low number. The approach is illustrated in detail for two typical buildings of the database, one low-rise (Building #4) and one medium-rise (Building #18), where the proposed FDS/UHS results show agreement with those obtained from detailed dynamic analysis. The work is presented in the context of a more general methodology to show its potential general applicability to other building types and locations.<br/> © 2020, Canadian Science Publishing. All rights reserved.},\nkey = {Hazards},\n%keywords = {Architectural design;Floors;Damping;Seismic response;Regression analysis;Reinforced concrete;Concrete buildings;Seismic design;},\n%note = {Existing reinforced concrete;Floor accelerations;Floor response spectrum;General methodologies;Lateral load resisting systems;Linear dynamic analysis;Modification factors;Non-structural components;},\nURL = {http://dx.doi.org/10.1139/cjce-2018-0151},\n} \n\n\n
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\n This paper extends the methodology presented in the companion paper to study the effects of non-structural components’ (NSCs) damping ratio and their location in the building on the pseudo-acceleration floor response spectra (PA-FRS) of reinforced concrete buildings, and propose equations to derive floor acceleration design spectra (FDS) directly from the uniform hazard design spectra (UHS) for Montréal, Canada. The buildings used in the study are 27 existing reinforced concrete structures with braced frames and shear walls as their lateral load resisting systems: 12 are low-rise (up to 3 stories above ground), 10 are medium-rise (4 to 7 stories), and 5 are high-rise (10 to 18 stories). Based on statistical and regression analysis of floor acceleration spectra generated from linear dynamic analysis of coupled building–NSC systems, two sets of modification factors are proposed to account for floor elevation and NSC damping, applicable to the experimentally-derived FDS for roof level and 5% NSC damping. Modification factor equations could be derived only for the low-rise and medium-rise building categories, as insufficient correlation in trends could be obtained for high-rises given their low number. The approach is illustrated in detail for two typical buildings of the database, one low-rise (Building #4) and one medium-rise (Building #18), where the proposed FDS/UHS results show agreement with those obtained from detailed dynamic analysis. The work is presented in the context of a more general methodology to show its potential general applicability to other building types and locations.
© 2020, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Experimental and numerical investigation of the saint-adelphe landslide after the 1988 saguenay earthquake.\n \n \n \n \n\n\n \n Abdellaziz, M.; Karray, M.; Hussien, M. N.; Delisle, M.; Ledoux, C.; Locat, P.; Mompin, R.; and Chekired, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 57(12): 1936 - 1952. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20204709514403 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental and numerical investigation of the saint-adelphe landslide after the 1988 saguenay earthquake},\njournal = {Canadian Geotechnical Journal},\nauthor = {Abdellaziz, Mustapha and Karray, Mourad and Hussien, Mahmoud N. and Delisle, Marie-Christine and Ledoux, Catherine and Locat, Pascal and Mompin, Remi and Chekired, Mohamed},\nvolume = {57},\nnumber = {12},\nyear = {2020},\npages = {1936 - 1952},\nissn = {00083674},\nabstract = {On 25 November 1988, after the Saguenay earthquake, a landslide occurred in the municipality of Saint-Adelphe. The soil profile indicated that the deposit was composed of a stiff clay crustal layer overlying sensitive plastic clay with a soft-to-stiff consistency. A geotechnical investigation was carried out in situ and in the laboratory and included the use of a new seismic simulator to develop a geotechnical model of the Saint-Adelphe clay. The model was incorporated in a finite-difference slope stability analysis before and during the earthquake. The results showed the development of plastic zones and the generation of pore water pressure, but the global safety factor remained above unity. A post-seismic analysis that utilized a strain-softening behavior model showed the initiation and propagation of the plastic zone, as well as the development of a failure surface close to the observed failure surface. Therefore, it is proposed that the Saint-Adelphe landslide could be explained by a progressive failure mechanism.<br/> © 2020, Canadian Science Publishing. All rights reserved.},\nkey = {Landslides},\n%keywords = {Soils;Safety factor;Earthquakes;Failure (mechanical);Clay deposits;},\n%note = {Geotechnical investigations;Geotechnical modeling;Global safety factors;Initiation and propagation;Numerical investigations;Pore-water pressures;Progressive failure;Slope stability analysis;},\nURL = {http://dx.doi.org/10.1139/cgj-2018-0629},\n} \n\n\n
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\n On 25 November 1988, after the Saguenay earthquake, a landslide occurred in the municipality of Saint-Adelphe. The soil profile indicated that the deposit was composed of a stiff clay crustal layer overlying sensitive plastic clay with a soft-to-stiff consistency. A geotechnical investigation was carried out in situ and in the laboratory and included the use of a new seismic simulator to develop a geotechnical model of the Saint-Adelphe clay. The model was incorporated in a finite-difference slope stability analysis before and during the earthquake. The results showed the development of plastic zones and the generation of pore water pressure, but the global safety factor remained above unity. A post-seismic analysis that utilized a strain-softening behavior model showed the initiation and propagation of the plastic zone, as well as the development of a failure surface close to the observed failure surface. Therefore, it is proposed that the Saint-Adelphe landslide could be explained by a progressive failure mechanism.
© 2020, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Dynamic Response of Tall Mass-Timber Buildings to Wind Excitation.\n \n \n \n \n\n\n \n Bezabeh, M.; Bitsuamlak, G.; Popovski, M.; and Tesfamariam, S.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(10). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"DynamicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20204409406778 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Dynamic Response of Tall Mass-Timber Buildings to Wind Excitation},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Bezabeh, M.A. and Bitsuamlak, G.T. and Popovski, M. and Tesfamariam, S.},\nvolume = {146},\nnumber = {10},\nyear = {2020},\nissn = {07339445},\nabstract = {The use of timber panels to construct the lateral and gravity load resisting systems of tall mass-timber buildings makes them lightweight and less stiff than buildings made from conventional construction materials. As a result, frequent exposure to wind-induced oscillations could cause discomfort to the occupants. This study examines the dynamic response and serviceability-performance of five case study tall mass-timber buildings varying in height (10-, 15-, 20-, 30-, and 40-story). In the assessment, the case study buildings are structurally designed according to the 2015 National Building Code of Canada and CSA O86-14 standard. High-frequency pressure integration wind tunnel tests are conducted to obtain floor-by-floor aerodynamic wind load time histories. Dynamic structural analyses in the frequency domain are performed to calculate the peak floor accelerations for various levels of critical damping ratios, wind directions, and exposure conditions. For validation and to include the possible motion-dependent effects, such as aerodynamic damping, aeroelastic wind tunnel tests are also carried out on the model of the 40-story tall mass-timber building. A base-pivoted two-degrees-of-freedom stick type aeroelastic model is designed and built to simulate the dynamic response of the prototype building in its two fundamental sway modes of vibration. Overall, it is shown that the dynamic response of tall mass-timber buildings under wind excitation is strongly dependent on the height, structural damping, local turbulence intensity, and wind direction. Based on the case studies, recommendations regarding the habitability of mass-timber buildings, critical height limit, and mitigation strategies for wind-induced excessive motions are forwarded.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Dynamic response},\n%keywords = {Timber;Wind tunnels;Floors;Aerodynamics;Degrees of freedom (mechanics);Wooden buildings;Frequency domain analysis;Building materials;Damping;Gravitation;Wind stress;},\n%note = {Aerodynamic damping;Aeroelastic modeling;Conventional constructions;Dynamic structural analysis;Exposure conditions;Mitigation strategy;National Building Code of Canada;Two degrees of freedom;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002746},\n} \n\n\n
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\n\n\n
\n The use of timber panels to construct the lateral and gravity load resisting systems of tall mass-timber buildings makes them lightweight and less stiff than buildings made from conventional construction materials. As a result, frequent exposure to wind-induced oscillations could cause discomfort to the occupants. This study examines the dynamic response and serviceability-performance of five case study tall mass-timber buildings varying in height (10-, 15-, 20-, 30-, and 40-story). In the assessment, the case study buildings are structurally designed according to the 2015 National Building Code of Canada and CSA O86-14 standard. High-frequency pressure integration wind tunnel tests are conducted to obtain floor-by-floor aerodynamic wind load time histories. Dynamic structural analyses in the frequency domain are performed to calculate the peak floor accelerations for various levels of critical damping ratios, wind directions, and exposure conditions. For validation and to include the possible motion-dependent effects, such as aerodynamic damping, aeroelastic wind tunnel tests are also carried out on the model of the 40-story tall mass-timber building. A base-pivoted two-degrees-of-freedom stick type aeroelastic model is designed and built to simulate the dynamic response of the prototype building in its two fundamental sway modes of vibration. Overall, it is shown that the dynamic response of tall mass-timber buildings under wind excitation is strongly dependent on the height, structural damping, local turbulence intensity, and wind direction. Based on the case studies, recommendations regarding the habitability of mass-timber buildings, critical height limit, and mitigation strategies for wind-induced excessive motions are forwarded.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Soil moisture retrievals by combining passive microwave and optical data.\n \n \n \n \n\n\n \n Tong, C.; Wang, H.; Magagi, R.; Goita, K.; Zhu, L.; Yang, M.; and Deng, J.\n\n\n \n\n\n\n Remote Sensing, 12(19): 1 - 21. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"SoilPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204309384066 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Soil moisture retrievals by combining passive microwave and optical data},\njournal = {Remote Sensing},\nauthor = {Tong, Cheng and Wang, Hongquan and Magagi, Ramata and Goita, Kalifa and Zhu, Luyao and Yang, Mengying and Deng, Jinsong},\nvolume = {12},\nnumber = {19},\nyear = {2020},\npages = {1 - 21},\nissn = {20724292},\nabstract = {This paper aims to retrieve the temporal dynamics of soil moisture from 2015 to 2019 over an agricultural site in Southeast Australia using the Soil Moisture Active Passive (SMAP) brightness temperature. To meet this objective, two machine learning approaches, Random Forest (RF), Support Vector Machine (SVM), as well as a statistical Ordinary Least Squares (OLS) model were established, with the auxiliary data including the 16-day composite MODIS NDVI (MOD13Q1) and Surface Temperature (ST). The entire data were divided into two parts corresponding to ascending (6:00 p.m. local time) and descending (6:00 a.m. local time) orbits of SMAP overpasses. Thus, the three models were trained using the descending data acquired during the five years (2015 to 2019), and validated using the ascending product of the same period. Consequently, three different temporal variations of the soil moisture were obtained based on the three models. To evaluate their accuracies, the retrieved soil moisture was compared against the SMAP level-2 soil moisture product, as well as to in-situ ground station data. The comparative results show that the soil moisture obtained using the OLS, RF and SVM algorithms are highly correlated to the SMAP level-2 product, with high coefficients of determination (R<sup>2</sup>OLS = 0.981, R<sup>2</sup>SVM = 0.943, R<sup>2</sup>RF = 0.983) and low RMSE (RMSE<inf>OLS</inf> = 0.016 cm<sup>3</sup>/cm<sup>3</sup>, RMSE<inf>SVM</inf> = 0.047 cm<sup>3</sup>/cm<sup>3</sup>, RMSE<inf>RF</inf> = 0.016 cm<sup>3</sup>/cm<sup>3</sup>). Meanwhile, the estimated soil moistures agree with in-situ station data across different years (R<sup>2</sup>OLS = 0.376~0.85, R<sup>2</sup>SVM = 0.376~0.814, R<sup>2</sup>RF = 0.39~0.854; RMSE<inf>OLS</inf> = 0.049~0.105 cm<sup>3</sup>/cm<sup>3</sup>, RMSE<inf>SVM</inf> = 0.073~0.1 cm<sup>3</sup> /cm<sup>3</sup>, RMSE<inf>RF</inf> = 0.047~0.102 cm<sup>3</sup>/cm<sup>3</sup>), but an overestimation issue is observed for high vegetation conditions. The RF algorithm outperformed the SVM and OLS, in terms of the agreement with the ground measurements. This study suggests an alternative soil moisture retrieval scheme, in complementary to the SMAP baseline algorithm, for a fast soil moisture retrieval.<br/> © 2020 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Soil moisture},\n%keywords = {Random forests;Soil surveys;Decision trees;Support vector machines;},\n%note = {Brightness temperatures;Ground measurements;Ordinary least squares;Soil moisture active passive (SMAP);Soil moisture retrievals;Southeast australia;Surface temperatures;Vegetation condition;},\nURL = {http://dx.doi.org/10.3390/rs12193173},\n} \n\n\n
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\n This paper aims to retrieve the temporal dynamics of soil moisture from 2015 to 2019 over an agricultural site in Southeast Australia using the Soil Moisture Active Passive (SMAP) brightness temperature. To meet this objective, two machine learning approaches, Random Forest (RF), Support Vector Machine (SVM), as well as a statistical Ordinary Least Squares (OLS) model were established, with the auxiliary data including the 16-day composite MODIS NDVI (MOD13Q1) and Surface Temperature (ST). The entire data were divided into two parts corresponding to ascending (6:00 p.m. local time) and descending (6:00 a.m. local time) orbits of SMAP overpasses. Thus, the three models were trained using the descending data acquired during the five years (2015 to 2019), and validated using the ascending product of the same period. Consequently, three different temporal variations of the soil moisture were obtained based on the three models. To evaluate their accuracies, the retrieved soil moisture was compared against the SMAP level-2 soil moisture product, as well as to in-situ ground station data. The comparative results show that the soil moisture obtained using the OLS, RF and SVM algorithms are highly correlated to the SMAP level-2 product, with high coefficients of determination (R2OLS = 0.981, R2SVM = 0.943, R2RF = 0.983) and low RMSE (RMSEOLS = 0.016 cm3/cm3, RMSESVM = 0.047 cm3/cm3, RMSERF = 0.016 cm3/cm3). Meanwhile, the estimated soil moistures agree with in-situ station data across different years (R2OLS = 0.376 0.85, R2SVM = 0.376 0.814, R2RF = 0.39 0.854; RMSEOLS = 0.049 0.105 cm3/cm3, RMSESVM = 0.073 0.1 cm3 /cm3, RMSERF = 0.047 0.102 cm3/cm3), but an overestimation issue is observed for high vegetation conditions. The RF algorithm outperformed the SVM and OLS, in terms of the agreement with the ground measurements. This study suggests an alternative soil moisture retrieval scheme, in complementary to the SMAP baseline algorithm, for a fast soil moisture retrieval.
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Three-dimensional modelling of shear keys in concrete gravity dams using an advanced grillage method.\n \n \n \n \n\n\n \n Ftima, M. B.; Lafrance, S.; and Leger, P.\n\n\n \n\n\n\n Water Science and Engineering, 13(3): 223 - 232. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"Three-dimensionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204209353312 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Three-dimensional modelling of shear keys in concrete gravity dams using an advanced grillage method},\njournal = {Water Science and Engineering},\nauthor = {Ftima, Mahdi Ben and Lafrance, Stephane and Leger, Pierre},\nvolume = {13},\nnumber = {3},\nyear = {2020},\npages = {223 - 232},\nissn = {16742370},\nabstract = {Contraction joint shear keys are resilient features of gravity dams that can be considered to increase the sliding safety factors or minimise seismic residual sliding displacements, allowing costly remedial actions to be avoided. This paper presents a novel, robust, and computationally efficient three-dimensional (3D) modelling and simulation strategy of gravity dams, using a series of adjacent cantilever beam elements to represent individual monoliths. These monoliths are interconnected in the longitudinal direction by 3D no-tension link elements representing the lumped shear key stiffness contributions at a particular elevation. The objective is to assess the shear key internal force demands, including the axial force, shear, and moment demands. Shear key demand-capacity ratios can then be assessed with related multi-axial failure envelopes. The 3D link element stiffness coefficients were derived from a series of 3D finite element (FE) solid models with a detailed representation of geometrical features of multiple shear keys. The results from the proposed method based on advanced grillage analysis show strong agreement with reference solutions from 3D FE solid models, demonstrating high accuracy and performance of the proposed method. The application of the proposed advanced grillage method to a dam model with two monoliths clearly shows the advantage of the proposed method, in comparison to the classical approach used in practise.<br/> © 2020 Hohai University},\nkey = {Gravity dams},\n%keywords = {3D modeling;Finite element method;Stiffness;Concrete dams;Three dimensional computer graphics;Concretes;Safety factor;Seismology;},\n%note = {Computationally efficient;Concrete gravity dams;Longitudinal direction;Sliding displacements;Sliding safety factors;Stiffness coefficients;Three dimensional modelling;Threedimensional (3-D) modelling;},\nURL = {http://dx.doi.org/10.1016/j.wse.2020.09.003},\n} \n\n\n
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\n Contraction joint shear keys are resilient features of gravity dams that can be considered to increase the sliding safety factors or minimise seismic residual sliding displacements, allowing costly remedial actions to be avoided. This paper presents a novel, robust, and computationally efficient three-dimensional (3D) modelling and simulation strategy of gravity dams, using a series of adjacent cantilever beam elements to represent individual monoliths. These monoliths are interconnected in the longitudinal direction by 3D no-tension link elements representing the lumped shear key stiffness contributions at a particular elevation. The objective is to assess the shear key internal force demands, including the axial force, shear, and moment demands. Shear key demand-capacity ratios can then be assessed with related multi-axial failure envelopes. The 3D link element stiffness coefficients were derived from a series of 3D finite element (FE) solid models with a detailed representation of geometrical features of multiple shear keys. The results from the proposed method based on advanced grillage analysis show strong agreement with reference solutions from 3D FE solid models, demonstrating high accuracy and performance of the proposed method. The application of the proposed advanced grillage method to a dam model with two monoliths clearly shows the advantage of the proposed method, in comparison to the classical approach used in practise.
© 2020 Hohai University\n
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\n \n\n \n \n \n \n \n \n Estimation of Mineral Abundance from Hyperspectral Data Using a New Supervised Neighbor-Band Ratio Unmixing Approach.\n \n \n \n \n\n\n \n Siebels, K.; Goita, K.; and Germain, M.\n\n\n \n\n\n\n IEEE Transactions on Geoscience and Remote Sensing, 58(10): 6754 - 6766. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"EstimationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20204209349688 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Estimation of Mineral Abundance from Hyperspectral Data Using a New Supervised Neighbor-Band Ratio Unmixing Approach},\njournal = {IEEE Transactions on Geoscience and Remote Sensing},\nauthor = {Siebels, Kevin and Goita, Kalifa and Germain, Mickael},\nvolume = {58},\nnumber = {10},\nyear = {2020},\npages = {6754 - 6766},\nissn = {01962892},\nabstract = {This article compares the ability of nine unmixing models, including radiative transfer (RT) models as well as a new nonlinear unmixing approach called neighbor-band ratio unmixing (NBRU), to obtain mineralogical information from hyperspectral data. Their performance in estimating mineral abundances of 94 crafted mineral mixtures was first assessed. NBRU led to the best results among non-RT models with mean and median errors of 9.8% and 7.4%, respectively. Hapke's and Shkuratov's RT models obtained 6.5% and 5.6%, and 6.7% and 4.7%, respectively. In a second experiment, the mapping ability of six non-RT models and their robustness when facing endmember variability were evaluated. The assessment was performed on an AVIRIS hyperspectral image of the widely studied Cuprite area, NV, USA. Comparisons with validation maps showed that NBRU retrieved the best spatial distributions for seven of the nine minerals mapped.<br/> © 1980-2012 IEEE.},\nkey = {Minerals},\n%keywords = {Photomapping;Spectroscopy;},\n%note = {Band ratios;Endmember variabilities;Hyperspectral Data;Median errors;Non-linear unmixing;Radiative transfer model;Unmixing;},\nURL = {http://dx.doi.org/10.1109/TGRS.2020.2969577},\n} \n\n\n
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\n This article compares the ability of nine unmixing models, including radiative transfer (RT) models as well as a new nonlinear unmixing approach called neighbor-band ratio unmixing (NBRU), to obtain mineralogical information from hyperspectral data. Their performance in estimating mineral abundances of 94 crafted mineral mixtures was first assessed. NBRU led to the best results among non-RT models with mean and median errors of 9.8% and 7.4%, respectively. Hapke's and Shkuratov's RT models obtained 6.5% and 5.6%, and 6.7% and 4.7%, respectively. In a second experiment, the mapping ability of six non-RT models and their robustness when facing endmember variability were evaluated. The assessment was performed on an AVIRIS hyperspectral image of the widely studied Cuprite area, NV, USA. Comparisons with validation maps showed that NBRU retrieved the best spatial distributions for seven of the nine minerals mapped.
© 1980-2012 IEEE.\n
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\n \n\n \n \n \n \n \n \n Evaluation of FORMOSAT-2 and planetscope imagery for aboveground oil palm biomass estimation in a mature plantation in the Congo Basin.\n \n \n \n \n\n\n \n Migolet, P.; and Goita, K.\n\n\n \n\n\n\n Remote Sensing, 12(18). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"EvaluationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20204109322095 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evaluation of FORMOSAT-2 and planetscope imagery for aboveground oil palm biomass estimation in a mature plantation in the Congo Basin},\njournal = {Remote Sensing},\nauthor = {Migolet, Pierre and Goita, Kalifa},\nvolume = {12},\nnumber = {18},\nyear = {2020},\nissn = {20724292},\nabstract = {The present study developed methods using remote sensing for estimation of total dry aboveground biomass (AGB) of oil palm in the Congo Basin. To achieve this, stem diameters at breast height (DBH, 1.3 m) and stem heights were measured in an oil palm plantation located in Gabon (Congo Basin, Central Africa). These measurements were used to determine AGB in situ. The remote sensing approach that was used to estimate AGB was textural ordination (FOTO) based upon Fourier transforms that were applied, respectively, to PlanetScope and FORMOSAT-2 satellite images taken from the area. The FOTO method is based on the combined use of two-dimensional (2D) Fast Fourier Transform (FFT) and Principal Component Analysis (PCA). In the context of the present study, it was used to characterize the variation in canopy structure and to estimate the aboveground biomass of mature oil palms. Two types of equations linking FOTO indices to in situ biomass were developed: multiple linear regressions (MLR); and multivariate adaptive spline regressions (MARS). All best models developed yielded significant results, regardless of whether they were derived from PlanetScope or from FORMOSAT-2 images. Coefficients of determination (R<sup>2</sup>) varied between 0.80 and 0.92 (p ≤ 0.0005); and relative root mean-square-errors (%RMSE) were less than 10.12% in all cases. The best model was obtained using MARS approach with FOTO indices from FORMOSAT-2 (%RMSE = 6.09%).<br/> © 2020 by the authors.},\nkey = {Multiple linear regression},\n%keywords = {Splines;Fast Fourier transforms;Palm oil;Biomass;Mean square error;Remote sensing;Principal component analysis;},\n%note = {Above ground biomass;Multiple linear regressions;Oil palm biomass;Oil palm plantations;Remote sensing approaches;Root mean square errors;Satellite images;Two dimensional (2D) fast Fourier transform;},\nURL = {http://dx.doi.org/10.3390/RS12182926},\n} \n\n\n
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\n The present study developed methods using remote sensing for estimation of total dry aboveground biomass (AGB) of oil palm in the Congo Basin. To achieve this, stem diameters at breast height (DBH, 1.3 m) and stem heights were measured in an oil palm plantation located in Gabon (Congo Basin, Central Africa). These measurements were used to determine AGB in situ. The remote sensing approach that was used to estimate AGB was textural ordination (FOTO) based upon Fourier transforms that were applied, respectively, to PlanetScope and FORMOSAT-2 satellite images taken from the area. The FOTO method is based on the combined use of two-dimensional (2D) Fast Fourier Transform (FFT) and Principal Component Analysis (PCA). In the context of the present study, it was used to characterize the variation in canopy structure and to estimate the aboveground biomass of mature oil palms. Two types of equations linking FOTO indices to in situ biomass were developed: multiple linear regressions (MLR); and multivariate adaptive spline regressions (MARS). All best models developed yielded significant results, regardless of whether they were derived from PlanetScope or from FORMOSAT-2 images. Coefficients of determination (R2) varied between 0.80 and 0.92 (p ≤ 0.0005); and relative root mean-square-errors (%RMSE) were less than 10.12% in all cases. The best model was obtained using MARS approach with FOTO indices from FORMOSAT-2 (%RMSE = 6.09%).
© 2020 by the authors.\n
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\n \n\n \n \n \n \n \n \n Wind loads on solar panels mounted on flat roofs: Effect of geometric scale.\n \n \n \n \n\n\n \n Alrawashdeh, H.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 206. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"WindPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20203609149017 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind loads on solar panels mounted on flat roofs: Effect of geometric scale},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Alrawashdeh, Hatem and Stathopoulos, Ted},\nvolume = {206},\nyear = {2020},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">The paper outlines a set of experimental criteria implemented to examine the influence of geometric scale on wind-induced pressures on roof-mounted solar panels tested in a simulated atmospheric boundary layer. The results of this research contribute significantly to the understanding of the obstacles hindering the reliable evaluation of wind loads on solar panels, bearing in mind that the size of wind tunnel models of such structures is a key stumbling block to conducting experiments and getting reliable results. The effect of such shortcomings in the codification process is examined. Three models of geometric ratios 1:50, 1:100 and 1:200 were designed, manufactured and tested in the atmospheric boundary layer wind tunnel of Concordia University. The results show that the geometric test scaling is an important parameter in simulating solar panel models in atmospheric boundary layer wind tunnels, particularly when considering design wind loads.<br/></div> © 2020 Elsevier Ltd},\nkey = {Wind tunnels},\n%keywords = {Aerodynamic loads;Wind stress;Solar concentrators;Atmospheric boundary layer;Geometry;Roofs;Solar panels;Tunnels;},\n%note = {Boundary layer wind tunnel;Concordia University;Design wind loads;Geometric ratios;Geometric scale;Reliable results;Stumbling blocks;Wind tunnel models;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2020.104339},\n} \n\n\n
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The paper outlines a set of experimental criteria implemented to examine the influence of geometric scale on wind-induced pressures on roof-mounted solar panels tested in a simulated atmospheric boundary layer. The results of this research contribute significantly to the understanding of the obstacles hindering the reliable evaluation of wind loads on solar panels, bearing in mind that the size of wind tunnel models of such structures is a key stumbling block to conducting experiments and getting reliable results. The effect of such shortcomings in the codification process is examined. Three models of geometric ratios 1:50, 1:100 and 1:200 were designed, manufactured and tested in the atmospheric boundary layer wind tunnel of Concordia University. The results show that the geometric test scaling is an important parameter in simulating solar panel models in atmospheric boundary layer wind tunnels, particularly when considering design wind loads.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n An improved high-order ISPH method for simulation of free-surface flows and convection heat transfer.\n \n \n \n \n\n\n \n Garoosi, F.; and Shakibaeinia, A.\n\n\n \n\n\n\n Powder Technology, 376: 668 - 696. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20203709152834 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An improved high-order ISPH method for simulation of free-surface flows and convection heat transfer},\njournal = {Powder Technology},\nauthor = {Garoosi, Faroogh and Shakibaeinia, Ahmad},\nvolume = {376},\nyear = {2020},\npages = {668 - 696},\nissn = {00325910},\nabstract = {The present work introduces a modified Incompressible Smoothed Particle Hydrodynamics (ISPH) model for simulation of free-surface flows and convection heat transfer. First, two new gradient and Laplacian models are proposed based on the Taylor series expansion and then used for discretization of the diffusion terms, Pressure Poisson's equation (PPE), and divergence of velocity. To maintain overall high-order accuracy, an explicit third-order TVD Runge-Kutta scheme is employed for discretization of the transient terms in Navier-Stokes and energy equations. Moreover, a new Hybrid Particle Shifting Technique (HPST) is developed by combining the classical PST and a collision model. A new kernel function is developed by combination of the Gaussian and polynomial functions and is then applied to the simulation of classical 1D Sod shock tube. Furthermore, a novel Hybrid Free-surface Detection (HFD) technique is proposed for accurate imposition of Dirichlet pressure boundary condition at the free surface area. The validity and applicability of proposed numerical schemes are verified against the several challenging benchmark cases including: dam-break flows with/without an obstacles, stretching water drop, rotating square patch of fluid, Rayleigh-Taylor instability, energy and exergy analysis of natural convection heat transfer in differentially heated cavity. The results show that, the newly constructed kernel function can successfully guarantee the stability and convergence of the numerical solution. Furthermore, it is found that, the proposed Hybrid Particle Shifting Technique (HPST) can efficiently resolve the unphysical discontinuity and suppress spurious pressure fluctuations.<br/> © 2020 Elsevier B.V.},\nkey = {Laplace transforms},\n%keywords = {Hydrodynamics;Natural convection;Poisson equation;Shock tubes;Mathematical operators;Navier Stokes equations;Runge Kutta methods;Boundary conditions;},\n%note = {Differentially heated cavity;Energy and exergy analysis;Modeling for simulations;Pressure boundary conditions;Rayleigh-Taylor instabilities;Smoothed particle hydrodynamics;Stability and convergence;Taylor series expansions;},\nURL = {http://dx.doi.org/10.1016/j.powtec.2020.08.074},\n} \n\n\n
\n
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\n The present work introduces a modified Incompressible Smoothed Particle Hydrodynamics (ISPH) model for simulation of free-surface flows and convection heat transfer. First, two new gradient and Laplacian models are proposed based on the Taylor series expansion and then used for discretization of the diffusion terms, Pressure Poisson's equation (PPE), and divergence of velocity. To maintain overall high-order accuracy, an explicit third-order TVD Runge-Kutta scheme is employed for discretization of the transient terms in Navier-Stokes and energy equations. Moreover, a new Hybrid Particle Shifting Technique (HPST) is developed by combining the classical PST and a collision model. A new kernel function is developed by combination of the Gaussian and polynomial functions and is then applied to the simulation of classical 1D Sod shock tube. Furthermore, a novel Hybrid Free-surface Detection (HFD) technique is proposed for accurate imposition of Dirichlet pressure boundary condition at the free surface area. The validity and applicability of proposed numerical schemes are verified against the several challenging benchmark cases including: dam-break flows with/without an obstacles, stretching water drop, rotating square patch of fluid, Rayleigh-Taylor instability, energy and exergy analysis of natural convection heat transfer in differentially heated cavity. The results show that, the newly constructed kernel function can successfully guarantee the stability and convergence of the numerical solution. Furthermore, it is found that, the proposed Hybrid Particle Shifting Technique (HPST) can efficiently resolve the unphysical discontinuity and suppress spurious pressure fluctuations.
© 2020 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Incertitudes des niveaux d’eau dérivés de l’altimétrie satellitaire pour des étendues d’eau soumises à l’action de la glace.\n \n \n \n \n\n\n \n Ziyad, J.; Goita, K.; and Magagi, R.\n\n\n \n\n\n\n Canadian Journal of Remote Sensing,1 - 25. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"IncertitudesPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20203609149506 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigating the Uncertainties of Multi-Satellite Altimetry for Estimating Water Level Variations of Inland Water Bodies Covered by Ice},\ntitle = {Incertitudes des niveaux d’eau dérivés de l’altimétrie satellitaire pour des étendues d’eau soumises à l’action de la glace},\njournal = {Canadian Journal of Remote Sensing},\nauthor = {Ziyad, Jawad and Goita, Kalifa and Magagi, Ramata},\nyear = {2020},\npages = {1 - 25},\nissn = {07038992},\nabstract = {The presence of heterogeneous targets, such as ice, remains a major challenge for the use of altimetric data over inland water bodies. Jason-2 and SARAL/Altika satellites use retracking algorithms designed for oceanic waveforms to retrieve water levels from altimeter measurements. Nevertheless, the accuracy of these approaches need to be assessed over continental waters in northern latitudes, particularly during the presence of partial or almost complete ice cover. In this study, we compared water level estimates of different retracking algorithms with in situ measurements over 20 ice-covered lakes and rivers across Canada. This comparison was done for the following two periods: (1) the time series considered for each satellite (2008–2016 for Jason-2, and 2013–2016 for SARAL/Altika); and (2) the freeze-thaw periods included in each time series. The results showed that the algorithms produce variable uncertainties depending on the size of the water bodies and the ice conditions. ICE-1 (used with Jason-2 data) provided better water level accuracy for 90% of the water bodies studied (R<sup>2</sup> ≥ 0.8, unbiased RMSE ≤ 0.3 m). All the retracking algorithms used by SARAL/Altika provided results that are comparable to in situ observations, thus denoting the good performance of the SARAL technology.<br/> ©, Copyright © CASI.},\nkey = {Water levels},\n%keywords = {Time series;Geodetic satellites;Ice;},\n%note = {Altimeter measurements;Continental waters;In-situ measurement;In-situ observations;Multi-satellite altimetry;Northern latitudes;Retracking algorithms;Water level variations;},\nURL = {http://dx.doi.org/10.1080/07038992.2020.1780906},\n} \n\n\n
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\n The presence of heterogeneous targets, such as ice, remains a major challenge for the use of altimetric data over inland water bodies. Jason-2 and SARAL/Altika satellites use retracking algorithms designed for oceanic waveforms to retrieve water levels from altimeter measurements. Nevertheless, the accuracy of these approaches need to be assessed over continental waters in northern latitudes, particularly during the presence of partial or almost complete ice cover. In this study, we compared water level estimates of different retracking algorithms with in situ measurements over 20 ice-covered lakes and rivers across Canada. This comparison was done for the following two periods: (1) the time series considered for each satellite (2008–2016 for Jason-2, and 2013–2016 for SARAL/Altika); and (2) the freeze-thaw periods included in each time series. The results showed that the algorithms produce variable uncertainties depending on the size of the water bodies and the ice conditions. ICE-1 (used with Jason-2 data) provided better water level accuracy for 90% of the water bodies studied (R2 ≥ 0.8, unbiased RMSE ≤ 0.3 m). All the retracking algorithms used by SARAL/Altika provided results that are comparable to in situ observations, thus denoting the good performance of the SARAL technology.
©, Copyright © CASI.\n
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\n \n\n \n \n \n \n \n \n Impact of standing column well operation on carbonate scaling.\n \n \n \n \n\n\n \n Cerclet, L.; Courcelles, B.; and Pasquier, P.\n\n\n \n\n\n\n Water (Switzerland), 12(8). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20203609134354 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact of standing column well operation on carbonate scaling},\njournal = {Water (Switzerland)},\nauthor = {Cerclet, Leo and Courcelles, Benoit and Pasquier, Philippe},\nvolume = {12},\nnumber = {8},\nyear = {2020},\nissn = {20734441},\nabstract = {Standing column well constitutes a recent promising solution to provide heating or cooling and to reduce greenhouse gases emissions in urban areas. Nevertheless, scaling issues can emerge in presence of carbonates and impact their efficiency. Even though a thermo-hydro-geochemical model demonstrated the impact of the water temperature on carbonate concentration, this conclusion has not been yet demonstrated by field investigations. To do so, an experimental ground source heat pump system connected to a standing column well was operated under various conditions to collect 50 groundwater samples over a period of 267 days. These field samples were used for mineral analysis and laboratory batch experiments. The results were analyzed with multivariate regression and geochemical simulations and confirmed a clear relationship between the calcium concentrations measured in the well, the temperature and the calcite equilibrium constant. It was also found that operating a ground source heat pump system in conjunction with a small groundwater treatment system allows reduction of calcium concentration in the well, while shutting down the system leads to a quite rapid increase at a level consistent with the regional calcium concentration. Although no major clogging or biofouling problem was observed after two years of operation, mineral scales made of carbonates precipitated on a flowmeter and hindered its operation. The paper provides insight on the impact of standing column well on groundwater quality and suggests some mitigation measures.<br/> © 2020 by the authors.},\nkey = {Water treatment},\n%keywords = {Greenhouse gases;Calcite;Groundwater;Water quality;Hydrochemistry;Water temperature;Regression analysis;},\n%note = {Calcium concentration;Carbonate concentrations;Geochemical modeling;Geochemical simulation;Greenhouse gases emissions;Groundwater treatment;Multivariate regression;Standing column wells;},\nURL = {http://dx.doi.org/10.3390/w12082222},\n} \n\n\n
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\n Standing column well constitutes a recent promising solution to provide heating or cooling and to reduce greenhouse gases emissions in urban areas. Nevertheless, scaling issues can emerge in presence of carbonates and impact their efficiency. Even though a thermo-hydro-geochemical model demonstrated the impact of the water temperature on carbonate concentration, this conclusion has not been yet demonstrated by field investigations. To do so, an experimental ground source heat pump system connected to a standing column well was operated under various conditions to collect 50 groundwater samples over a period of 267 days. These field samples were used for mineral analysis and laboratory batch experiments. The results were analyzed with multivariate regression and geochemical simulations and confirmed a clear relationship between the calcium concentrations measured in the well, the temperature and the calcite equilibrium constant. It was also found that operating a ground source heat pump system in conjunction with a small groundwater treatment system allows reduction of calcium concentration in the well, while shutting down the system leads to a quite rapid increase at a level consistent with the regional calcium concentration. Although no major clogging or biofouling problem was observed after two years of operation, mineral scales made of carbonates precipitated on a flowmeter and hindered its operation. The paper provides insight on the impact of standing column well on groundwater quality and suggests some mitigation measures.
© 2020 by the authors.\n
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\n \n\n \n \n \n \n \n \n A hydrocarbon pipeline spill risk assessment framework for drinking water supply.\n \n \n \n \n\n\n \n Kammoun, R.; Barrette, S.; Bichai, F.; Dorner, S.; and Prevost, M.\n\n\n \n\n\n\n AWWA Water Science, 2(4). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20203609123122 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A hydrocarbon pipeline spill risk assessment framework for drinking water supply},\njournal = {AWWA Water Science},\nauthor = {Kammoun, Raja and Barrette, Simon and Bichai, Francoise and Dorner, Sarah and Prevost, Michele},\nvolume = {2},\nnumber = {4},\nyear = {2020},\nissn = {25778161},\nabstract = {<div data-language="eng" data-ev-field="abstract">Although infrequent, pipeline spills have the potential to contaminate source water supplies and disrupt drinking water production for extended periods. Detailed multiphase contaminant fate and transport models linked to hydrodynamic models are ideal for determining the potential impact of oil spills on drinking water sources. However, sufficient data are often unavailable to simulate spills scenarios. Thus, a simple semiquantitative modeling approach is proposed that is based on documented pipeline spills recorded in scientific literature. A risk matrix was used to combine the consequences of a spill with the probability that it would contaminate drinking water sources. The new Pipeline Spill Risk Assessment Framework was applied to 26 drinking water intakes located in the greater Montreal area (Quebec). The proposed framework allows for transparency and facilitation of public discussions with regard to oil spill risks and decision-making for source water protection and water safety plans.<br/></div> © 2020 American Water Works Association},\nkey = {Risk assessment},\n%keywords = {Contamination;Decision making;Oil spills;Petroleum transportation;Pipelines;Potable water;Water supply;},\n%note = {Drinking water production;Drinking water sources;Drinking water supplies;Multiphases;Risk assessment framework;Risks assessments;Source water protection;Source waters;Vulnerability assessments;Water safety plans;},\nURL = {http://dx.doi.org/10.1002/aws2.1181},\n} \n\n\n
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Although infrequent, pipeline spills have the potential to contaminate source water supplies and disrupt drinking water production for extended periods. Detailed multiphase contaminant fate and transport models linked to hydrodynamic models are ideal for determining the potential impact of oil spills on drinking water sources. However, sufficient data are often unavailable to simulate spills scenarios. Thus, a simple semiquantitative modeling approach is proposed that is based on documented pipeline spills recorded in scientific literature. A risk matrix was used to combine the consequences of a spill with the probability that it would contaminate drinking water sources. The new Pipeline Spill Risk Assessment Framework was applied to 26 drinking water intakes located in the greater Montreal area (Quebec). The proposed framework allows for transparency and facilitation of public discussions with regard to oil spill risks and decision-making for source water protection and water safety plans.
© 2020 American Water Works Association\n
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\n \n\n \n \n \n \n \n \n Revisiting hurricane track model for wind risk assessment.\n \n \n \n \n\n\n \n Snaiki, R.; and Wu, T.\n\n\n \n\n\n\n Structural Safety, 87. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"RevisitingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20203209024549 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Revisiting hurricane track model for wind risk assessment},\njournal = {Structural Safety},\nauthor = {Snaiki, Reda and Wu, Teng},\nvolume = {87},\nyear = {2020},\nissn = {01674730},\nabstract = {Hurricane wind risk assessment has been significantly improved with the evolvement of synthesis methodologies from the single site probabilistic method to the hurricane track model (including five simulation components of genesis, translation, intensity, decay and boundary-layer wind). As first-step efforts towards advancing the data-driven hurricane track model, widely used by engineering community, to a physics-based framework for more accurate and reliable hurricane risk assessment, a new intensity model integrating important dynamics and thermodynamics inside the storms is developed. Furthermore, an extensive statistical analysis of hurricane trajectories is carried out to obtain an enhanced translation model and a height-resolving analytical wind model is utilized to acquire the vertical profiles of wind speed and direction between ground-surface and gradient levels. The other two simulation components (i.e., genesis and decay) of the hurricane track model are also revisited for the sake of completeness. Ten thousand years of full-track synthetic hurricanes are generated and compared with the HURDAT database at specific mileposts along the US East coast to validate the overall performance of the developed simulation framework (in terms of annual occurrence rate, intensity, translation speed and heading angle). Then, the New Jersey coastline is employed as a case study to compare the simulated hurricane wind speeds with ASCE 7–16 recommendations, to highlight the wind directionality effects on extreme wind speeds, and to investigate the joint distribution of hurricane wind speed and size.<br/> © 2020 Elsevier Ltd},\nkey = {Risk analysis},\n%keywords = {Thermodynamics;Hurricanes;Wind;Boundary layers;Speed;Risk assessment;},\n%note = {Engineering community;Extreme wind speed;Joint distributions;Probabilistic methods;Simulation components;Simulation framework;Synthesis methodology;Wind speed and directions;},\nURL = {http://dx.doi.org/10.1016/j.strusafe.2020.102003},\n} \n\n\n
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\n Hurricane wind risk assessment has been significantly improved with the evolvement of synthesis methodologies from the single site probabilistic method to the hurricane track model (including five simulation components of genesis, translation, intensity, decay and boundary-layer wind). As first-step efforts towards advancing the data-driven hurricane track model, widely used by engineering community, to a physics-based framework for more accurate and reliable hurricane risk assessment, a new intensity model integrating important dynamics and thermodynamics inside the storms is developed. Furthermore, an extensive statistical analysis of hurricane trajectories is carried out to obtain an enhanced translation model and a height-resolving analytical wind model is utilized to acquire the vertical profiles of wind speed and direction between ground-surface and gradient levels. The other two simulation components (i.e., genesis and decay) of the hurricane track model are also revisited for the sake of completeness. Ten thousand years of full-track synthetic hurricanes are generated and compared with the HURDAT database at specific mileposts along the US East coast to validate the overall performance of the developed simulation framework (in terms of annual occurrence rate, intensity, translation speed and heading angle). Then, the New Jersey coastline is employed as a case study to compare the simulated hurricane wind speeds with ASCE 7–16 recommendations, to highlight the wind directionality effects on extreme wind speeds, and to investigate the joint distribution of hurricane wind speed and size.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Wind pressure coefficients for buildings with air curtains.\n \n \n \n \n\n\n \n Zhang, C.; Yang, S.; Shu, C.; Wang, L. (.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 205. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"WindPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20203209019691 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind pressure coefficients for buildings with air curtains},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Zhang, Cheng and Yang, Senwen and Shu, Chang and Wang, Liangzhu (Leon) and Stathopoulos, Ted},\nvolume = {205},\nyear = {2020},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">An air curtain is often installed at a building entrance as an air barrier to reduce infiltration and resultant energy and air quality concerns. Due to its direct contact with the ambient environment, wind could affect the air curtain's performance significantly, whereas its interaction with the wind has not been well understood. This study carried out a series of experiments on a sub-scaled building model with an air curtain in an atmospheric boundary layer wind tunnel. A CFD model was also built to further investigate the air curtain jet interactions with the wind. The CFD model was verified and validated through Particle Image Velocimetry measurements for different air curtain and wind conditions and in terms of the function of the dimensionless air infiltration rate versus the dimensionless pressure difference across the air curtain. This study defined the wind pressure coefficient for air curtains based on their performance under wind compared to that without wind. The wind pressure coefficient was found to be constant for different air curtain supply speed, supply angle, and wind speed, but varies with wind direction, so its profile was provided as a function of wind direction. This study provides insights into air curtain performance under various wind conditions.<br/></div> © 2020 Elsevier Ltd},\nkey = {Wind tunnels},\n%keywords = {Velocity measurement;Wind speed;Structural dynamics;Air quality;Atmospheric boundary layer;Wind effects;},\n%note = {Air infiltration;Ambient environment;Jet interactions;Particle image velocimetry measurement;Pressure differences;Quality concerns;Wind conditions;Wind pressure coefficient;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2020.104265},\n} \n\n\n
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\n
An air curtain is often installed at a building entrance as an air barrier to reduce infiltration and resultant energy and air quality concerns. Due to its direct contact with the ambient environment, wind could affect the air curtain's performance significantly, whereas its interaction with the wind has not been well understood. This study carried out a series of experiments on a sub-scaled building model with an air curtain in an atmospheric boundary layer wind tunnel. A CFD model was also built to further investigate the air curtain jet interactions with the wind. The CFD model was verified and validated through Particle Image Velocimetry measurements for different air curtain and wind conditions and in terms of the function of the dimensionless air infiltration rate versus the dimensionless pressure difference across the air curtain. This study defined the wind pressure coefficient for air curtains based on their performance under wind compared to that without wind. The wind pressure coefficient was found to be constant for different air curtain supply speed, supply angle, and wind speed, but varies with wind direction, so its profile was provided as a function of wind direction. This study provides insights into air curtain performance under various wind conditions.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Exploring the regional-scale potential of the use of wood products in non-residential buildings: A building permits-based quantitative approach.\n \n \n \n \n\n\n \n Cordier, S.; Robichaud, F.; Blanchet, P.; and Amor, B.\n\n\n \n\n\n\n BioResources, 15(1): 787 - 813. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ExploringPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20203008981486 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Exploring the regional-scale potential of the use of wood products in non-residential buildings: A building permits-based quantitative approach},\njournal = {BioResources},\nauthor = {Cordier, Sylvain and Robichaud, Francois and Blanchet, Pierre and Amor, Ben},\nvolume = {15},\nnumber = {1},\nyear = {2020},\npages = {787 - 813},\nissn = {19302126},\nabstract = {In the construction sector, wood products are gaining interest. Methods are necessary to quantify material use and evaluate their potential effects. When quantifying the building material consumption, many studies are limited to residential buildings due to the lack of data for non-residential buildings. This research aimed at investigating a methodology to account for non-residential building material consumption. A method to estimate the volume of wood products in the structures of the new non-residential buildings was presented. Then, projections of the estimation were suggested according to three scenarios (minimum, average, and maximum). Sensitivity analyses highlighted the parameters that present the greatest contribution to the scenarios. The relative importance of the estimation to the total harvesting of all wood markets was also assessed. Despite the high uncertainty in wood consumption for non-residential building structures, the estimation had a small weight on the total harvesting of the Quebec province. The results showed how and when the resource availability could be constrained depending on the assumptions. This method can serve for life cycle inventory for an environmental assessment or wood flow analysis, but more research on the material composition of the non-residential building archetypes is necessary.<br/> © 2020 North Carolina State University.},\nkey = {Wood products},\n%keywords = {Construction industry;Life cycle;Sensitivity analysis;Timber;Building materials;Housing;Wooden buildings;},\n%note = {Construction sectors;Environmental assessment;Life Cycle Inventory;Material compositions;Material consumption;Quantitative approach;Residential building;Resource availability;},\nURL = {http://dx.doi.org/10.15376/biores.15.1.787-813},\n} \n\n\n
\n
\n\n\n
\n In the construction sector, wood products are gaining interest. Methods are necessary to quantify material use and evaluate their potential effects. When quantifying the building material consumption, many studies are limited to residential buildings due to the lack of data for non-residential buildings. This research aimed at investigating a methodology to account for non-residential building material consumption. A method to estimate the volume of wood products in the structures of the new non-residential buildings was presented. Then, projections of the estimation were suggested according to three scenarios (minimum, average, and maximum). Sensitivity analyses highlighted the parameters that present the greatest contribution to the scenarios. The relative importance of the estimation to the total harvesting of all wood markets was also assessed. Despite the high uncertainty in wood consumption for non-residential building structures, the estimation had a small weight on the total harvesting of the Quebec province. The results showed how and when the resource availability could be constrained depending on the assumptions. This method can serve for life cycle inventory for an environmental assessment or wood flow analysis, but more research on the material composition of the non-residential building archetypes is necessary.
© 2020 North Carolina State University.\n
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\n \n\n \n \n \n \n \n \n Insights into the Transport and Fragmentation Characteristics of Earthquake-Induced Rock Avalanche: Numerical Study.\n \n \n \n \n\n\n \n Gao, G.; Meguid, M. A.; Chouinard, L. E.; and Xu, C.\n\n\n \n\n\n\n International Journal of Geomechanics, 20(9). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"InsightsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202908952069 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Insights into the Transport and Fragmentation Characteristics of Earthquake-Induced Rock Avalanche: Numerical Study},\njournal = {International Journal of Geomechanics},\nauthor = {Gao, Ge and Meguid, Mohamed A. and Chouinard, Luc E. and Xu, Chong},\nvolume = {20},\nnumber = {9},\nyear = {2020},\nissn = {15323641},\nabstract = {The earthquake-induced rock avalanche in the Tangjia Valley was the most notable geological disaster triggered by the Lushan earthquake in 2013. In order to investigate the transport kinematics and depositional mechanism of this catastrophic landslide, a 2D discrete element model was developed and calibrated using field data. The model was then used to analyze the seismic response and mass transport process of a natural slope. The slope response to earthquake was numerically studied focusing on crack initiation, propagation, and coalescence within the rock mass. The mass movement and accumulation process were interpreted in terms of evolution of stress and solid fraction, kinematic behavior, and energy conversion. During the mass transport process, the slope was fragmented progressively due to intense shearing, allowing a basal layer of gradually fining solid particles to be generated with simultaneous occurrence of violent collisions, increase in particle kinematic activities, and the reduction of solid concentration. To further study this deformation process, fragment size distributions and fractal dimensions were described by Weibull distribution and power-law function, respectively. This statistical analysis reveals that dynamic disintegration continuously operates with the increasing runout distance. It is also found that the distribution of the fragment shapes becomes stable as the avalanche loses its momentum and deposition starts in the runout area. The proposed framework for the analysis of rock avalanches can be used to understand the physics of similar geological hazards.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Fractal dimension},\n%keywords = {Disintegration;Geology;Rocks;Deposition;Particle size analysis;Earthquakes;Kinematics;Landslides;Weibull distribution;Energy conversion;},\n%note = {Catastrophic landslides;Deformation process;Discrete element modeling;Dynamic disintegration;Fragment size distribution;Mass-transport process;Power-law functions;Solid concentrations;},\nURL = {http://dx.doi.org/10.1061/(ASCE)GM.1943-5622.0001800},\n} \n\n\n
\n
\n\n\n
\n The earthquake-induced rock avalanche in the Tangjia Valley was the most notable geological disaster triggered by the Lushan earthquake in 2013. In order to investigate the transport kinematics and depositional mechanism of this catastrophic landslide, a 2D discrete element model was developed and calibrated using field data. The model was then used to analyze the seismic response and mass transport process of a natural slope. The slope response to earthquake was numerically studied focusing on crack initiation, propagation, and coalescence within the rock mass. The mass movement and accumulation process were interpreted in terms of evolution of stress and solid fraction, kinematic behavior, and energy conversion. During the mass transport process, the slope was fragmented progressively due to intense shearing, allowing a basal layer of gradually fining solid particles to be generated with simultaneous occurrence of violent collisions, increase in particle kinematic activities, and the reduction of solid concentration. To further study this deformation process, fragment size distributions and fractal dimensions were described by Weibull distribution and power-law function, respectively. This statistical analysis reveals that dynamic disintegration continuously operates with the increasing runout distance. It is also found that the distribution of the fragment shapes becomes stable as the avalanche loses its momentum and deposition starts in the runout area. The proposed framework for the analysis of rock avalanches can be used to understand the physics of similar geological hazards.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Fully-coupled hydro-mechanical cracking using XFEM in 3D for application to complex flow in discontinuities including drainage system.\n \n \n \n \n\n\n \n Roth, S.; Leger, P.; and Soulaimani, A.\n\n\n \n\n\n\n Computer Methods in Applied Mechanics and Engineering, 370. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"Fully-coupledPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20203008976539 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Fully-coupled hydro-mechanical cracking using XFEM in 3D for application to complex flow in discontinuities including drainage system},\njournal = {Computer Methods in Applied Mechanics and Engineering},\nauthor = {Roth, Simon-Nicolas and Leger, Pierre and Soulaimani, Azzeddine},\nvolume = {370},\nyear = {2020},\nissn = {00457825},\nabstract = {The presence of uplift pressures in cracked plain concrete hydraulic structures is a major concern for their durability, serviceability and stability. To assess the performance of cracked structures several mechanical and hydraulic response parameters must be computed. This paper presents the development, implementation and application of a new nonlinear combined segregated fully-coupled hydromechanical model for application to non-planar 3D hydraulic fractures where complex flow is occurring. The eXtended Finite Element Method (XFEM) formulation is used, as it facilitates the computation of the crack aperture as well as the application of water pressure on crack surfaces for the simulation of hydraulic fracture initiation and propagation. To take into consideration the effects of drainage in numerical modeling and simulation, two coupled (multi-physics) finite element models are used; (1) one for the uplift pressures where a hydraulic mesh with refinement around drains is used, and (2) one for the mechanical response coupled with the computation of the unsaturated interstitial seepage problem. The two subproblems are solved using a partitioned procedure, as they have different resolution requirements. Finally, the mechanical mesh and the hydraulic mesh have non-matching discrete interfaces that must be coupled while respecting the equilibrium of the applied loads. Applications of the proposed hydromechanical constitutive model and numerical solution strategy to different problems are presented on a wedge splitting test and a full scale gravity dam including multiple drainage configurations. A case study adapted from a real dam is also given with a complex 3D non-planar discontinuity surface.<br/> © 2020},\nkey = {Uplift pressure},\n%keywords = {Three dimensional computer graphics;Finite element method;Fracture;Mesh generation;Hydraulic fracturing;Numerical models;Cracks;Hydraulic structures;},\n%note = {Different resolutions;Extended finite element method;Fracture initiation;Mechanical response;Model and simulation;Numerical solution strategies;Planar discontinuity;Wedge splitting tests;},\nURL = {http://dx.doi.org/10.1016/j.cma.2020.113282},\n} \n\n\n
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\n The presence of uplift pressures in cracked plain concrete hydraulic structures is a major concern for their durability, serviceability and stability. To assess the performance of cracked structures several mechanical and hydraulic response parameters must be computed. This paper presents the development, implementation and application of a new nonlinear combined segregated fully-coupled hydromechanical model for application to non-planar 3D hydraulic fractures where complex flow is occurring. The eXtended Finite Element Method (XFEM) formulation is used, as it facilitates the computation of the crack aperture as well as the application of water pressure on crack surfaces for the simulation of hydraulic fracture initiation and propagation. To take into consideration the effects of drainage in numerical modeling and simulation, two coupled (multi-physics) finite element models are used; (1) one for the uplift pressures where a hydraulic mesh with refinement around drains is used, and (2) one for the mechanical response coupled with the computation of the unsaturated interstitial seepage problem. The two subproblems are solved using a partitioned procedure, as they have different resolution requirements. Finally, the mechanical mesh and the hydraulic mesh have non-matching discrete interfaces that must be coupled while respecting the equilibrium of the applied loads. Applications of the proposed hydromechanical constitutive model and numerical solution strategy to different problems are presented on a wedge splitting test and a full scale gravity dam including multiple drainage configurations. A case study adapted from a real dam is also given with a complex 3D non-planar discontinuity surface.
© 2020\n
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\n \n\n \n \n \n \n \n \n Design and fabrication of bridge decks made from extruded aluminium.\n \n \n \n \n\n\n \n Djedid, A.; Guillot, M.; Desjardins, V.; Annan, C.; and Fafard, M.\n\n\n \n\n\n\n Keikinzoku Yosetsu/Journal of Light Metal Welding, 58: 138 - 144. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"DesignPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202608877115 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design and fabrication of bridge decks made from extruded aluminium},\njournal = {Keikinzoku Yosetsu/Journal of Light Metal Welding},\nauthor = {Djedid, Amar and Guillot, Michel and Desjardins, Victor and Annan, Charles-Darwin and Fafard, Mario},\nvolume = {58},\nyear = {2020},\npages = {138 - 144},\nissn = {03685306},\nabstract = {Aluminium is increasingly used to replace aging concrete, steel or wood bridge decks. Typically, aluminium decks are made from extrusions welded together using gas metal arc welding (GMAW) or friction-stir welding (FSW) techniques. This paper describes firstly the steps followed in the design of an extruded aluminium bridge deck to be supported on steel girders in highway application. The design is based on the requirements of the Canadian Highway Bridge Design Code (CHBDC). It is observed that the fatigue strength of the aluminium alloy controls the design. Accordingly, specially designed AA6005A-T61 extrusion profiles are proposed. They are optimised by exploiting the fatigue strengths in both the plain and welded areas. In the second part of the paper, a manufacturing and assembly strategy is presented. This strategy proposes a specific sequence of installation that may provide satisfactory fit and limit the effect of any geometric inaccuracies in the individual extrusions. In addition, by using the GMAW technique with multiple passes, it may be possible to reduce the effect of heat deformations, the amount of distortions and residual stresses, especially near the heat affected zones around the welds.<br/> © 2020 Japan Light Metal Welding Association},\nkey = {Gas metal arc welding},\n%keywords = {Extrusion;Friction stir welding;Heat affected zone;Fatigue of materials;Gas welding;Aluminum alloys;Friction;Bridge decks;},\n%note = {Canadian highway bridge design codes;Fatigue strength;Friction stir welding(FSW);Gas metal arc welding (GMAW);Heat deformation;Highway applications;Multiple pass;Specific sequences;},\nURL = {http://dx.doi.org/10.11283/jlwa.58.138s},\n} \n\n\n
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\n Aluminium is increasingly used to replace aging concrete, steel or wood bridge decks. Typically, aluminium decks are made from extrusions welded together using gas metal arc welding (GMAW) or friction-stir welding (FSW) techniques. This paper describes firstly the steps followed in the design of an extruded aluminium bridge deck to be supported on steel girders in highway application. The design is based on the requirements of the Canadian Highway Bridge Design Code (CHBDC). It is observed that the fatigue strength of the aluminium alloy controls the design. Accordingly, specially designed AA6005A-T61 extrusion profiles are proposed. They are optimised by exploiting the fatigue strengths in both the plain and welded areas. In the second part of the paper, a manufacturing and assembly strategy is presented. This strategy proposes a specific sequence of installation that may provide satisfactory fit and limit the effect of any geometric inaccuracies in the individual extrusions. In addition, by using the GMAW technique with multiple passes, it may be possible to reduce the effect of heat deformations, the amount of distortions and residual stresses, especially near the heat affected zones around the welds.
© 2020 Japan Light Metal Welding Association\n
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\n \n\n \n \n \n \n \n \n Design of a coupled BIPV/T - Solid desiccant cooling system for a warm and humid climate.\n \n \n \n \n\n\n \n Nibandhe, A.; Bonyadi, N.; Rounis, E.; Lee, B.; Athienitis, A.; and Bagchi, A.\n\n\n \n\n\n\n In pages 2670 - 2680, Santiago, Chile, 2020. \n \n\n\n\n
\n\n\n\n \n \n \"DesignPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20202608874200 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design of a coupled BIPV/T - Solid desiccant cooling system for a warm and humid climate},\njournal = {Proceedings of the ISES Solar World Congress 2019 and IEA SHC International Conference on Solar Heating and Cooling for Buildings and Industry 2019},\nauthor = {Nibandhe, Aditya and Bonyadi, Nima and Rounis, Efstratios and Lee, Bruno and Athienitis, Andreas and Bagchi, Ashutosh},\nyear = {2020},\npages = {2670 - 2680},\naddress = {Santiago, Chile},\nabstract = {The use of vapor compression systems in warm and humid climates is energy intensive due to the excessive latent load in the ambient air. As an alternative, low grade thermally driven cooling systems can contribute to lowering the cooling energy demand. The objective of this study is to investigate the performance of a solid desiccant cooling system (SDC) coupled with an air-based roof building-integrated photovoltaic/thermal (BIPV/T) system located in Chennai, India and provide the basis for the design of such a system. For this purpose, three different configurations are proposed and investigated considering the cooling performance, electrical and thermal output of the BIPV/T, desiccant regeneration temperature and thermal comfort conditions in the building. In addition, parametric studies have been conducted to further analyze the performance of each configuration. The results demonstrate that the BIPV/T outlet air temperature is maintained above 50<sup>o</sup>C for more than 40% of the daylight hours. At steady state conditions of 30<sup>o</sup>C ambient temperature, 70% RH and 60<sup>o</sup>C-80<sup>o</sup>C regeneration temperatures, supply air temperature and RH range between 25.8<sup>o</sup>C-17.1<sup>o</sup>C and 55-60% are achieved, respectively. The moisture removal capacity ranges between 1.96 gr/kg and 4.54 gr/kg for different configurations. Finally, a thermal performance (COPth) of 1.81 is achieved for DINC DS configuration at regeneration temperature of 60<sup>o</sup>C.<br/> © 2019. The Authors. Published by International Solar Energy Society Selection and/or peer review under responsibility of Scientific Committee},\nkey = {Cooling systems},\n%keywords = {Driers (materials);Atmospheric temperature;Solar energy;Thermoelectric equipment;},\n%note = {Building integrated photovoltaic;Regeneration temperature;Steady-state condition;Supply air temperature;Thermal Performance;Thermally driven cooling;Vapor-compression systems;Warm and humid climates;},\nURL = {http://dx.doi.org/10.18086/swc.2019.55.10},\n} \n\n\n
\n
\n\n\n
\n The use of vapor compression systems in warm and humid climates is energy intensive due to the excessive latent load in the ambient air. As an alternative, low grade thermally driven cooling systems can contribute to lowering the cooling energy demand. The objective of this study is to investigate the performance of a solid desiccant cooling system (SDC) coupled with an air-based roof building-integrated photovoltaic/thermal (BIPV/T) system located in Chennai, India and provide the basis for the design of such a system. For this purpose, three different configurations are proposed and investigated considering the cooling performance, electrical and thermal output of the BIPV/T, desiccant regeneration temperature and thermal comfort conditions in the building. In addition, parametric studies have been conducted to further analyze the performance of each configuration. The results demonstrate that the BIPV/T outlet air temperature is maintained above 50oC for more than 40% of the daylight hours. At steady state conditions of 30oC ambient temperature, 70% RH and 60oC-80oC regeneration temperatures, supply air temperature and RH range between 25.8oC-17.1oC and 55-60% are achieved, respectively. The moisture removal capacity ranges between 1.96 gr/kg and 4.54 gr/kg for different configurations. Finally, a thermal performance (COPth) of 1.81 is achieved for DINC DS configuration at regeneration temperature of 60oC.
© 2019. The Authors. Published by International Solar Energy Society Selection and/or peer review under responsibility of Scientific Committee\n
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\n \n\n \n \n \n \n \n \n Hurricane Wind and Storm Surge Effects on Coastal Bridges under a Changing Climate.\n \n \n \n \n\n\n \n Snaiki, R.; Wu, T.; Whittaker, A. S.; and Atkinson, J. F.\n\n\n \n\n\n\n Transportation Research Record, 2674(6): 23 - 32. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"HurricanePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20202808932837 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Hurricane Wind and Storm Surge Effects on Coastal Bridges under a Changing Climate},\njournal = {Transportation Research Record},\nauthor = {Snaiki, Reda and Wu, Teng and Whittaker, Andrew S. and Atkinson, Joseph F.},\nvolume = {2674},\nnumber = {6},\nyear = {2020},\npages = {23 - 32},\nissn = {03611981},\nabstract = {<div data-language="eng" data-ev-field="abstract">Hurricanes and their cascading hazards have been responsible for widespread damage to life and property, and are the largest contributor to insured annual losses in coastal areas of the U.S.A. Such losses are expected to increase because of changing climate and growing coastal population density. An effective methodology to assess hurricane wind and surge hazard risks to coastal bridges under changing climate conditions is proposed. The influence of climate change scenarios on hurricane intensity and frequency is explored. A framework that couples the hurricane tracking model (consisting of genesis, track, and intensity) with a height-resolving analytical wind model and a newly developed machine learning-based surge model is used for risk assessment. The proposed methodology is applied to a coastal bridge to obtain its traffic closure rate resulting from the observed (historical) and future (projected) hurricane winds and storm surges, demonstrating the effects of changing climate on the civil infrastructure in a hurricane-prone region.<br/></div> © National Academy of Sciences: Transportation Research Board 2020.},\nkey = {Hurricanes},\n%keywords = {Climate change;Floods;Hazards;Population statistics;Risk assessment;Storms;},\n%note = {Changing climate;Climate condition;Coastal area;Coastal population;Hazard risks;Population densities;Property;Storm surges;Widespread damage;Wind surges;},\nURL = {http://dx.doi.org/10.1177/0361198120917671},\n} \n\n\n
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Hurricanes and their cascading hazards have been responsible for widespread damage to life and property, and are the largest contributor to insured annual losses in coastal areas of the U.S.A. Such losses are expected to increase because of changing climate and growing coastal population density. An effective methodology to assess hurricane wind and surge hazard risks to coastal bridges under changing climate conditions is proposed. The influence of climate change scenarios on hurricane intensity and frequency is explored. A framework that couples the hurricane tracking model (consisting of genesis, track, and intensity) with a height-resolving analytical wind model and a newly developed machine learning-based surge model is used for risk assessment. The proposed methodology is applied to a coastal bridge to obtain its traffic closure rate resulting from the observed (historical) and future (projected) hurricane winds and storm surges, demonstrating the effects of changing climate on the civil infrastructure in a hurricane-prone region.
© National Academy of Sciences: Transportation Research Board 2020.\n
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\n \n\n \n \n \n \n \n \n In-plane cyclic response of high-rise reinforced concrete masonry structural walls with boundary elements.\n \n \n \n \n\n\n \n Aly, N.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 219. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"In-planePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20202708895490 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {In-plane cyclic response of high-rise reinforced concrete masonry structural walls with boundary elements},\njournal = {Engineering Structures},\nauthor = {Aly, Nader and Galal, Khaled},\nvolume = {219},\nyear = {2020},\nissn = {01410296},\nabstract = {The majority of tested Reinforced Concrete Masonry (RCM) shear walls with boundary elements represented walls in low- to mid-rise buildings. In addition, these tested walls had continuous vertical reinforcement with no lap splices, which is impractical in multi-story masonry buildings. Therefore, this study aims to evaluate the structural performance of high-rise RCM structural walls with boundary elements under reversed cyclic loading simulating seismic actions. This is achieved by constructing and testing four half-scale fully grouted RCM shear walls with boundary elements under constant axial load and quasi-static reversed cyclic loading. The walls were designed and constructed with similar geometry and material properties and were tested under the same level of axial compressive stress. The studied parameters are the wall's shear span-to-depth ratio, the type of boundary elements’ masonry blocks (stretcher or C-shaped), and the lap splicing of vertical reinforcement in the plastic hinge region. The objective is to quantify the cyclic response of ductile RCM shear walls and to provide experimental evidence of its reliable structural performance for higher aspect ratios. Furthermore, the present study investigates the impact of the presence of lap splices in the plastic hinge region on the ductile response of high-rise RCM walls with boundary elements. The tested walls had an enhanced cyclic response due to its end zone confinement. The testing results demonstrated that the shear span significantly influences the distribution and layout of cracks, the lateral stiffness and resistance, and the post-peak response. Using the C-shaped blocks instead of the regular stretcher blocks in constructing the boundary elements enhanced the construction and performance of the walls. Lap splicing of vertical rebars increased the initial lateral stiffness, resulted in a higher rate of stiffness and strength degradation, and slightly limited the ultimate displacement ductility. However, with proper detailing of the splice and confinement of the end zones, the premature tensile bond failure was prevented.<br/> © 2020 Elsevier Ltd},\nkey = {Aspect ratio},\n%keywords = {Structural analysis;Cyclic loads;Concrete construction;Concrete buildings;Reinforced concrete;Stiffness;Shear walls;},\n%note = {Axial-compressive stress;Displacement ductility;Experimental evidence;Reinforced concrete masonry;Reversed cyclic loading;Shear span-to-depth ratios;Structural performance;Vertical reinforcement;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2020.110771},\n} \n\n\n
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\n The majority of tested Reinforced Concrete Masonry (RCM) shear walls with boundary elements represented walls in low- to mid-rise buildings. In addition, these tested walls had continuous vertical reinforcement with no lap splices, which is impractical in multi-story masonry buildings. Therefore, this study aims to evaluate the structural performance of high-rise RCM structural walls with boundary elements under reversed cyclic loading simulating seismic actions. This is achieved by constructing and testing four half-scale fully grouted RCM shear walls with boundary elements under constant axial load and quasi-static reversed cyclic loading. The walls were designed and constructed with similar geometry and material properties and were tested under the same level of axial compressive stress. The studied parameters are the wall's shear span-to-depth ratio, the type of boundary elements’ masonry blocks (stretcher or C-shaped), and the lap splicing of vertical reinforcement in the plastic hinge region. The objective is to quantify the cyclic response of ductile RCM shear walls and to provide experimental evidence of its reliable structural performance for higher aspect ratios. Furthermore, the present study investigates the impact of the presence of lap splices in the plastic hinge region on the ductile response of high-rise RCM walls with boundary elements. The tested walls had an enhanced cyclic response due to its end zone confinement. The testing results demonstrated that the shear span significantly influences the distribution and layout of cracks, the lateral stiffness and resistance, and the post-peak response. Using the C-shaped blocks instead of the regular stretcher blocks in constructing the boundary elements enhanced the construction and performance of the walls. Lap splicing of vertical rebars increased the initial lateral stiffness, resulted in a higher rate of stiffness and strength degradation, and slightly limited the ultimate displacement ductility. However, with proper detailing of the splice and confinement of the end zones, the premature tensile bond failure was prevented.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Erratum to \"A new approach for generating optimal GLDAS hydrological products and uncertainties\" [Sci. Total Environ. Volume 730, 15 August 2020, 138932] (Science of the Total Environment (2020) 730, (S0048969720324499), (10.1016/j.scitotenv.2020.138932)).\n \n \n \n \n\n\n \n Fatolazadeh, F.; Eshagh, M.; and Goita, K.\n\n\n \n\n\n\n Science of the Total Environment, 737. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ErratumPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20202508853680 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Erratum to "A new approach for generating optimal GLDAS hydrological products and uncertainties" [Sci. Total Environ. Volume 730, 15 August 2020, 138932] (Science of the Total Environment (2020) 730, (S0048969720324499), (10.1016/j.scitotenv.2020.138932))},\njournal = {Science of the Total Environment},\nauthor = {Fatolazadeh, Farzam and Eshagh, Mehdi and Goita, Kalifa},\nvolume = {737},\nyear = {2020},\nissn = {00489697},\nabstract = {The publisher regrets that Tables 1 and 2 are incorrect in the published version. The corrected versions are below: [Table presented] [Table presented] The publisher would like to apologise for any inconvenience caused.<br/> © 2020 Elsevier B.V.},\nURL = {http://dx.doi.org/10.1016/j.scitotenv.2020.140120},\n} \n\n\n
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\n The publisher regrets that Tables 1 and 2 are incorrect in the published version. The corrected versions are below: [Table presented] [Table presented] The publisher would like to apologise for any inconvenience caused.
© 2020 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Integrated approach for the MASW dispersion analysis using the spectral element technique and trust region reflective method.\n \n \n \n \n\n\n \n Liu, H.; Maghoul, P.; Shalaby, A.; Bahari, A.; and Moradi, F.\n\n\n \n\n\n\n Computers and Geotechnics, 125. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"IntegratedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20202508852193 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Integrated approach for the MASW dispersion analysis using the spectral element technique and trust region reflective method},\njournal = {Computers and Geotechnics},\nauthor = {Liu, Hongwei and Maghoul, Pooneh and Shalaby, Ahmed and Bahari, Ako and Moradi, Farid},\nvolume = {125},\nyear = {2020},\nissn = {0266352X},\nabstract = {In this paper, a semi-analytical elastodynamic forward solver was proposed for the Multichannel Analysis of Surface Waves (MASW) using the spectral element technique for the first time. A root finding method based on Brent's algorithm was proposed to accurately extract the dispersion curves. The trust region reflective method, an effective bound-supported least square algorithm, was applied, for the first time, for the inversion analysis of MASW data. In comparison to the commonly used neighborhood algorithm, the proposed solver converges rapidly; the Euclidean distance between the measured and numerically calculated dispersion curves are significantly reduced within only 300 runs of the forward solver in comparison to over 10,000 runs using the neighborhood algorithm. Several numerical case studies were performed to demonstrate the selection of initial guesses as well as the bounds of each optimization parameter. Also, a parametric study was performed to determine the effect of discontinuity in the soil stratigraphy on the dispersion curves. Finally, the integrated approach developed in this study was used to analyze the MASW data collected in a site in south Iceland. It was concluded that the proposed approach determines effectively and efficiently the soil stratigraphy as well as soil properties.<br/> © 2020 Elsevier Ltd},\nkey = {Dispersion (waves)},\n%keywords = {Soils;Integrated control;Surface waves;Least squares approximations;Stratigraphy;},\n%note = {Dispersion analysis;Euclidean distance;Integrated approach;Least square algorithms;Multi-channel analysis of surface waves;Neighborhood algorithm;Optimization parameter;Root-finding methods;},\nURL = {http://dx.doi.org/10.1016/j.compgeo.2020.103689},\n} \n\n\n
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\n In this paper, a semi-analytical elastodynamic forward solver was proposed for the Multichannel Analysis of Surface Waves (MASW) using the spectral element technique for the first time. A root finding method based on Brent's algorithm was proposed to accurately extract the dispersion curves. The trust region reflective method, an effective bound-supported least square algorithm, was applied, for the first time, for the inversion analysis of MASW data. In comparison to the commonly used neighborhood algorithm, the proposed solver converges rapidly; the Euclidean distance between the measured and numerically calculated dispersion curves are significantly reduced within only 300 runs of the forward solver in comparison to over 10,000 runs using the neighborhood algorithm. Several numerical case studies were performed to demonstrate the selection of initial guesses as well as the bounds of each optimization parameter. Also, a parametric study was performed to determine the effect of discontinuity in the soil stratigraphy on the dispersion curves. Finally, the integrated approach developed in this study was used to analyze the MASW data collected in a site in south Iceland. It was concluded that the proposed approach determines effectively and efficiently the soil stratigraphy as well as soil properties.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Development of a mapping framework for ecosystem services: The case of sediment control supply at a watershed scale in Newfoundland, Canada.\n \n \n \n \n\n\n \n Schmidt, A.; Fournier, R. A.; Luther, J. E.; and Trudel, M.\n\n\n \n\n\n\n Ecological Indicators, 117. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"DevelopmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202508853261 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Development of a mapping framework for ecosystem services: The case of sediment control supply at a watershed scale in Newfoundland, Canada},\njournal = {Ecological Indicators},\nauthor = {Schmidt, Aurelie and Fournier, Richard A. and Luther, Joan E. and Trudel, Melanie},\nvolume = {117},\nyear = {2020},\nissn = {1470160X},\nabstract = {Mapping the supply of ecosystem services (ESs) is essential for communicating the importance of ESs to policy makers and to demonstrate that sustainable development is being applied with due diligence by forest managers. ES mapping facilitates the integration of ES assessments into the decision-making process. To that end, the main objective of this study was to provide a mapping framework for a specific water-related regulating ES – the sediment control service (SCS) – developed for a forest-dominated watershed in western Newfoundland, Canada (640 km<sup>2</sup>). The mapping framework proposes the development of composite indicators (referred to as an index), based on a proxy variables causal relationship approach, which is less complex to implement than physical models and less subjective than expert opinions. Two composite indicators used to rank sub-watersheds on a relative scale were developed: one using equal weights among proxies and a second using expert opinion to assign weights to proxies. The use of an index for mapping addresses the multidimensional and complex nature of ESs. The proxy variables represent ecosystem function indicators (FI) that are necessary to describe the causal relationship between ecological functions and SCS. The validation of ESs map results is often lacking in the literature. Therefore, we propose comparing the SCS relative scales with a sediment-yield classification that is simulated using the hydrological model SWAT (Soil Water Assessment Tool). To that end, the semi-distributed hydrological SWAT model has been developed. The overall agreement of the classification ranged from 35 to 81% depending upon the timeframe and weighting schemes that were applied, with better results being obtained for periods with more forest management operations and the expert-based weighting scheme. Results of the framework implementation show the potential supply of SCS at a sub-watershed scale and highlight those sub-watersheds most likely to be affected by forest management operations.<br/> © 2020},\nkey = {Forestry},\n%keywords = {Sediments;Decision making;Watersheds;Ecosystems;Mapping;Soil moisture;},\n%note = {Causal relationships;Composite indicators;Decision making process;Ecological functions;Hydrological modeling;Management operation;Newfoundland , Canada;Soil water assessment tool;},\nURL = {http://dx.doi.org/10.1016/j.ecolind.2020.106518},\n} \n\n\n
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\n Mapping the supply of ecosystem services (ESs) is essential for communicating the importance of ESs to policy makers and to demonstrate that sustainable development is being applied with due diligence by forest managers. ES mapping facilitates the integration of ES assessments into the decision-making process. To that end, the main objective of this study was to provide a mapping framework for a specific water-related regulating ES – the sediment control service (SCS) – developed for a forest-dominated watershed in western Newfoundland, Canada (640 km2). The mapping framework proposes the development of composite indicators (referred to as an index), based on a proxy variables causal relationship approach, which is less complex to implement than physical models and less subjective than expert opinions. Two composite indicators used to rank sub-watersheds on a relative scale were developed: one using equal weights among proxies and a second using expert opinion to assign weights to proxies. The use of an index for mapping addresses the multidimensional and complex nature of ESs. The proxy variables represent ecosystem function indicators (FI) that are necessary to describe the causal relationship between ecological functions and SCS. The validation of ESs map results is often lacking in the literature. Therefore, we propose comparing the SCS relative scales with a sediment-yield classification that is simulated using the hydrological model SWAT (Soil Water Assessment Tool). To that end, the semi-distributed hydrological SWAT model has been developed. The overall agreement of the classification ranged from 35 to 81% depending upon the timeframe and weighting schemes that were applied, with better results being obtained for periods with more forest management operations and the expert-based weighting scheme. Results of the framework implementation show the potential supply of SCS at a sub-watershed scale and highlight those sub-watersheds most likely to be affected by forest management operations.
© 2020\n
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\n \n\n \n \n \n \n \n \n Circular economy and the construction industry: Existing trends, challenges and prospective framework for sustainable construction.\n \n \n \n \n\n\n \n Hossain, M. U.; Ng, S. T.; Antwi-Afari, P.; and Amor, B.\n\n\n \n\n\n\n Renewable and Sustainable Energy Reviews, 130. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"CircularPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20202408833403 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Circular economy and the construction industry: Existing trends, challenges and prospective framework for sustainable construction},\njournal = {Renewable and Sustainable Energy Reviews},\nauthor = {Hossain, Md. Uzzal and Ng, S. Thomas and Antwi-Afari, Prince and Amor, Ben},\nvolume = {130},\nyear = {2020},\nissn = {13640321},\nabstract = {<div data-language="eng" data-ev-field="abstract">The circular economy (CE) concept has received increasing attention among different parties on various levels recently. Due to the concern on significant resources consumption in the construction industry without concerning the physical limit resources, a paradigm shift of linear economy to CE model is inevitable for conserving the resources and promoting the efficient use of resources. Adopting CE into the construction industry can promote the successful transition to sustainable construction. Although early stage of development in the construction industry, the scientific contribution of CE agenda in the construction industry is significantly increasing. Therefore, this review aimed to identity the implications, considerations, contributions and challenges of CE in the construction industry by systematically analyzing the recent literature. In addition to existing trends and considerations, this study highlighted the numerous challenges under design, materials selection, supply chain, business model, uncertainty and risk, collaborations among actions, knowledge of understanding, relevant policy, integration of urban metabolism, and methodology for CE evaluation. The study found that CE implementation into the case-specific building with full scale evaluation is yet to be conducted, and a comprehensive CE integration and methodology framework is yet to be developed. A prospective integrated framework for CE adoption and evaluation method is proposed by analyzing the contemporary issues. It is believed that the analyzed critical issues for CE adoption, identified future research direction, and proposed frameworks and methodology should help further development of CE research and contribution to effective implementation of CE into the industry for promoting sustainable construction.<br/></div> © 2020 Elsevier Ltd},\nkey = {Construction industry},\n%keywords = {Life cycle;Supply chains;Sustainable development;},\n%note = {Challenge;Circular economy;Industrial ecology;Life cycle assessment;Paradigm shifts;Physical limits;Prospective framework;Prospectives;Resources consumption;Sustainable construction;},\nURL = {http://dx.doi.org/10.1016/j.rser.2020.109948},\n} \n\n\n
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The circular economy (CE) concept has received increasing attention among different parties on various levels recently. Due to the concern on significant resources consumption in the construction industry without concerning the physical limit resources, a paradigm shift of linear economy to CE model is inevitable for conserving the resources and promoting the efficient use of resources. Adopting CE into the construction industry can promote the successful transition to sustainable construction. Although early stage of development in the construction industry, the scientific contribution of CE agenda in the construction industry is significantly increasing. Therefore, this review aimed to identity the implications, considerations, contributions and challenges of CE in the construction industry by systematically analyzing the recent literature. In addition to existing trends and considerations, this study highlighted the numerous challenges under design, materials selection, supply chain, business model, uncertainty and risk, collaborations among actions, knowledge of understanding, relevant policy, integration of urban metabolism, and methodology for CE evaluation. The study found that CE implementation into the case-specific building with full scale evaluation is yet to be conducted, and a comprehensive CE integration and methodology framework is yet to be developed. A prospective integrated framework for CE adoption and evaluation method is proposed by analyzing the contemporary issues. It is believed that the analyzed critical issues for CE adoption, identified future research direction, and proposed frameworks and methodology should help further development of CE research and contribution to effective implementation of CE into the industry for promoting sustainable construction.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Acoustic emission monitoring of reinforced concrete wall-slab connections.\n \n \n \n \n\n\n \n Reboul, N.; Grazide, C.; Roy, N.; and Ferrier, E.\n\n\n \n\n\n\n Construction and Building Materials, 259. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"AcousticPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20202508838715 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Acoustic emission monitoring of reinforced concrete wall-slab connections},\njournal = {Construction and Building Materials},\nauthor = {Reboul, N. and Grazide, C. and Roy, N. and Ferrier, E.},\nvolume = {259},\nyear = {2020},\nissn = {09500618},\nabstract = {This study uses the acoustic emission (AE) technique to investigate the damage levels and mechanisms of two reinforced concrete (RC) wall-slab connections under a cyclic reverse loading. The first was tested until failure, whereas the second was tested only up to steel yielding. The classical AE signals parameters were investigated using univariate analysis and clustering methods. The univariate analysis of AE data enabled the definition of criteria to distinguish the damage levels of the connections. The clustering method provided information on damage mechanisms in RC wall-slab connections. Four mechanisms were then identified (mode-I and mode-II cracking and two mixed modes), and their chronologies were correlated with the mechanical results (non-linear part of the envelope curve, steel yielding).<br/> © 2020 Elsevier Ltd},\nkey = {Reinforced concrete},\n%keywords = {Acoustic emission testing;Cluster analysis;},\n%note = {Acoustic emission monitoring;Acoustic emission techniques;Clustering methods;Cyclic reverse loading;Damage mechanism;Envelope curve;Reinforced concrete wall;Univariate analysis;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2020.119661},\n} \n\n\n
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\n This study uses the acoustic emission (AE) technique to investigate the damage levels and mechanisms of two reinforced concrete (RC) wall-slab connections under a cyclic reverse loading. The first was tested until failure, whereas the second was tested only up to steel yielding. The classical AE signals parameters were investigated using univariate analysis and clustering methods. The univariate analysis of AE data enabled the definition of criteria to distinguish the damage levels of the connections. The clustering method provided information on damage mechanisms in RC wall-slab connections. Four mechanisms were then identified (mode-I and mode-II cracking and two mixed modes), and their chronologies were correlated with the mechanical results (non-linear part of the envelope curve, steel yielding).
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Modeling of the natural groundwater recharge under climate change: Sisseb El Alem Nadhour Saouaf basin (Central Tunisia) case study.\n \n \n \n \n\n\n \n Hamdi, M.; Goita, K.; Jerbi, H.; and Zagrarni, M. F.\n\n\n \n\n\n\n Environmental Earth Sciences, 79(12). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ModelingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202408809096 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modeling of the natural groundwater recharge under climate change: Sisseb El Alem Nadhour Saouaf basin (Central Tunisia) case study},\njournal = {Environmental Earth Sciences},\nauthor = {Hamdi, Mohamed and Goita, Kalifa and Jerbi, Hamza and Zagrarni, Mohamed Faouzi},\nvolume = {79},\nnumber = {12},\nyear = {2020},\nissn = {18666280},\nabstract = {In this work, two methods were used to assess the groundwater natural recharge of the Sisseb El Alem Nadhour Saouaf basin (SANS) in Northeastern of Tunisia. In fact, the natural recharge of the SANS aquifer remains a major unknown for hydrogeologists and decision makers. Based on the various databases that include geology, sedimentology, hydrology, geochemical and isotopic data, the groundwater natural recharge was estimated using two different approaches. In a first approach, a historical measurement of tritium, the radioactive isotope, was used to calculate the age of modern groundwater (< 50 years). The application of the tritium radioactivity model shows that in the SANS basin the renewal rate of groundwater ranges between 1.3 and 3%. However, this is difficult to generalize across the entire aquifer, given the large spatial and temporal variations of rain, and the uncertainty affecting the measurement of tritium rates in rain, as well as the uncertainty of the used radioactivity model. In the second approach, a quasi-steady hydrological model called the WetSpass model (Water and Energy Transfer between Soil, Plants and Atmosphere under quasi-steady state) was used to assess the spatiotemporal variability of the recharge. The results show that the average annual recharge between 1971 and 2016 is 10 Mm<sup>3</sup>/year. A value that remains minimal and that characterizes this kind of arid region. The spatial distribution maps of the recharge show that the maximum recharge occurs in the northwest edges of the basin, west and in the southern part, at the level of the outcrop permeable formations of the aquifers. Finally, the two methods used show that the groundwater natural recharge is very heterogeneous and limited in time and space. However, these results remain a further step to ameliorate the water budget of the SANS basin to perform a realistic hydrogeological model.<br/> © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.},\nkey = {Aquifers},\n%keywords = {Uncertainty analysis;Climate change;Energy transfer;Groundwater resources;Recharging (underground waters);Decision making;Hydrogeology;Radiation;Radioactivity;Tritium;Budget control;Rain;},\n%note = {Historical measurements;Hydrogeological models;Hydrological modeling;Natural groundwater;Permeable formations;Spatial and temporal variation;Spatial distribution map;Spatiotemporal variability;},\nURL = {http://dx.doi.org/10.1007/s12665-020-09010-6},\n} \n\n\n
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\n In this work, two methods were used to assess the groundwater natural recharge of the Sisseb El Alem Nadhour Saouaf basin (SANS) in Northeastern of Tunisia. In fact, the natural recharge of the SANS aquifer remains a major unknown for hydrogeologists and decision makers. Based on the various databases that include geology, sedimentology, hydrology, geochemical and isotopic data, the groundwater natural recharge was estimated using two different approaches. In a first approach, a historical measurement of tritium, the radioactive isotope, was used to calculate the age of modern groundwater (< 50 years). The application of the tritium radioactivity model shows that in the SANS basin the renewal rate of groundwater ranges between 1.3 and 3%. However, this is difficult to generalize across the entire aquifer, given the large spatial and temporal variations of rain, and the uncertainty affecting the measurement of tritium rates in rain, as well as the uncertainty of the used radioactivity model. In the second approach, a quasi-steady hydrological model called the WetSpass model (Water and Energy Transfer between Soil, Plants and Atmosphere under quasi-steady state) was used to assess the spatiotemporal variability of the recharge. The results show that the average annual recharge between 1971 and 2016 is 10 Mm3/year. A value that remains minimal and that characterizes this kind of arid region. The spatial distribution maps of the recharge show that the maximum recharge occurs in the northwest edges of the basin, west and in the southern part, at the level of the outcrop permeable formations of the aquifers. Finally, the two methods used show that the groundwater natural recharge is very heterogeneous and limited in time and space. However, these results remain a further step to ameliorate the water budget of the SANS basin to perform a realistic hydrogeological model.
© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.\n
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\n \n\n \n \n \n \n \n \n Mitigation of liquefaction-induced uplift of underground structures.\n \n \n \n \n\n\n \n Mahmoud, A. O.; Hussien, M. N.; Karray, M.; Chekired, M.; Bessette, C.; and Jinga, L.\n\n\n \n\n\n\n Computers and Geotechnics, 125. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"MitigationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202408802211 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Mitigation of liquefaction-induced uplift of underground structures},\njournal = {Computers and Geotechnics},\nauthor = {Mahmoud, Ahmed O. and Hussien, Mahmoud N. and Karray, Mourad and Chekired, Mohamed and Bessette, Carole and Jinga, Livius},\nvolume = {125},\nyear = {2020},\nissn = {0266352X},\nabstract = {Buoyancy is one of the most serious manifestations of underground structure's instability during strong ground motions. Soil liquefaction along with significant reduction of its shear modulus beneath these structures are the main driving factors of this phenomenon. In this article, the seismic behavior of underground access structures embedded in sandy deposits was analyzed using the finite differences (FD) program (FLAC) with an emphasis on structural failures under real earthquakes. A new liquefaction model "energy-based approach" which simulates material cyclic behavior and estimates pore water pressure build-up, was incorporated into the numerical code as a constitutive model of the soil. Also, linear structural elements were used to model the underground structure. Several mitigation methods have been modelled against the structure flotation. As well as a new combined mitigation method and its impacts on the structural performance have been detailed herein. Numerical results showed that gravel drains would effectively dissipate the excess pore water pressure beneath the structure while increasing the burial depth of the structure and adding an impermeable layer under it would increase the vertical effective stress and therefore detracts the ability of excess pore water pressure to push the structure upward. It is found that compiling a gravel drains surround the structure with an impermeable layer beneath the structure would effectively reduce the structural uplift more than any other stand-alone method.<br/> © 2020 Elsevier Ltd},\nkey = {Fracture mechanics},\n%keywords = {Earthquakes;Gravel;Soil liquefaction;Soils;Failure (mechanical);Pressure distribution;Flotation;Water;Underground structures;Pore pressure;},\n%note = {Energy based approach;Excess pore water pressure;Mitigation methods;Pore-water pressures;Strong ground motion;Structural elements;Structural failure;Structural performance;},\nURL = {http://dx.doi.org/10.1016/j.compgeo.2020.103663},\n} \n\n\n
\n
\n\n\n
\n Buoyancy is one of the most serious manifestations of underground structure's instability during strong ground motions. Soil liquefaction along with significant reduction of its shear modulus beneath these structures are the main driving factors of this phenomenon. In this article, the seismic behavior of underground access structures embedded in sandy deposits was analyzed using the finite differences (FD) program (FLAC) with an emphasis on structural failures under real earthquakes. A new liquefaction model \"energy-based approach\" which simulates material cyclic behavior and estimates pore water pressure build-up, was incorporated into the numerical code as a constitutive model of the soil. Also, linear structural elements were used to model the underground structure. Several mitigation methods have been modelled against the structure flotation. As well as a new combined mitigation method and its impacts on the structural performance have been detailed herein. Numerical results showed that gravel drains would effectively dissipate the excess pore water pressure beneath the structure while increasing the burial depth of the structure and adding an impermeable layer under it would increase the vertical effective stress and therefore detracts the ability of excess pore water pressure to push the structure upward. It is found that compiling a gravel drains surround the structure with an impermeable layer beneath the structure would effectively reduce the structural uplift more than any other stand-alone method.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Numerical simulation of experimentally shear-tested contact specimens from existing dam joints.\n \n \n \n \n\n\n \n Renaud, S.; Bouaanani, N.; and Miquel, B.\n\n\n \n\n\n\n Computers and Geotechnics, 125. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202408812536 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical simulation of experimentally shear-tested contact specimens from existing dam joints},\njournal = {Computers and Geotechnics},\nauthor = {Renaud, Sylvain and Bouaanani, Najib and Miquel, Benjamin},\nvolume = {125},\nyear = {2020},\nissn = {0266352X},\nabstract = {This paper first proposes an original procedure to implement three-dimensional (3D) surfaces of rough existing unbonded contact specimens, i.e. fully open with no chemical bond, into non-linear finite element models to numerically simulate shear tests conducted under Constant Normal Load (CNL) conditions. The developed procedure is applied to 18 contact specimens drilled from concrete, concrete-rock, and rock joints of existing dams. A total of 83 finite element models of the contact interfaces are generated and the results of the numerical simulations are analyzed and validated against corresponding experimental findings. Sensitivity analyses are conducted and highlight, among other things, that the geometric resolution must be selected with caution and that mismatch due to initially unmated conditions or differences between the geometries of the lower and upper contact faces must be considered. A practical non-linear shear strength criterion is also proposed and compared to numerical results. The results presented confirm the major role of roughness and matching properties in the shear response of dam joints. Finally, values of apparent cohesion and friction angle are suggested and applied to dam stability assessment while accounting for joint roughness and matching properties to emphasize the efficiency and relevance of such practice.<br/> © 2020},\nkey = {Finite element method},\n%keywords = {Concrete dams;Sensitivity analysis;System stability;Concretes;Numerical methods;Numerical models;},\n%note = {Contact interface;Friction angles;Geometric resolution;Matching property;Non-linear finite element model;Non-linear shear strengths;Numerical results;Three-dimensional (3D) surfaces;},\nURL = {http://dx.doi.org/10.1016/j.compgeo.2020.103630},\n} \n\n\n
\n
\n\n\n
\n This paper first proposes an original procedure to implement three-dimensional (3D) surfaces of rough existing unbonded contact specimens, i.e. fully open with no chemical bond, into non-linear finite element models to numerically simulate shear tests conducted under Constant Normal Load (CNL) conditions. The developed procedure is applied to 18 contact specimens drilled from concrete, concrete-rock, and rock joints of existing dams. A total of 83 finite element models of the contact interfaces are generated and the results of the numerical simulations are analyzed and validated against corresponding experimental findings. Sensitivity analyses are conducted and highlight, among other things, that the geometric resolution must be selected with caution and that mismatch due to initially unmated conditions or differences between the geometries of the lower and upper contact faces must be considered. A practical non-linear shear strength criterion is also proposed and compared to numerical results. The results presented confirm the major role of roughness and matching properties in the shear response of dam joints. Finally, values of apparent cohesion and friction angle are suggested and applied to dam stability assessment while accounting for joint roughness and matching properties to emphasize the efficiency and relevance of such practice.
© 2020\n
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\n \n\n \n \n \n \n \n Experimental study of FRP wrapping for RC bridge under seismic loads.\n \n \n \n\n\n \n St-Georges, E.; Roy, N.; Labossiere, P.; Proulx, J.; and Paultre, P.\n\n\n \n\n\n\n In pages 559 - 562, Miami, FL, United states, 2020. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20202308794687 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental study of FRP wrapping for RC bridge under seismic loads},\njournal = {Composites in Civil Engineering, CICE 2006},\nauthor = {St-Georges, Eric and Roy, Nathalie and Labossiere, Pierre and Proulx, Jean and Paultre, Patrick},\nyear = {2020},\npages = {559 - 562},\naddress = {Miami, FL, United states},\nabstract = {An ongoing research project at Université de Sherbrooke has shown that fibre reinforced polymers (FRPs) enhance ductility as well as flexural capacity and shear resistance. An experimental program was completed on six 2.15-m high column specimens which were tested under combined axial and cyclic lateral loads. The objective of the experimental project presented herein was to test a new strengthening configuration of reinforced-concrete bridge columns using FRP wrapping. The retrofitted columns were subjected to cyclic lateral loads with two varying axial load levels representative of service conditions for bridges and for building, respectively, as well as two wrapping configurations, one based on "conventional" design and the other on displacement-based design. The results are analysed in this paper in order to: (i) evaluate the extent of seismic-related damages in FRP retrofitted bridge columns; (ii) compare the resistance and ductility of each column, before and after the retrofit; and (iii) compare the efficiency of conventional and performance-based wrapping configurations. The paper provides a description of the specimens, rehabilitation techniques, and testing apparatus. Results for three of the six columns under service axial load conditions representative of bridge piers are presented and discussed.<br/> © 2006 Composites in Civil Engineering, CICE 2006. All rights reserved.},\nkey = {Reinforced concrete},\n%keywords = {Seismic design;Ductility;Seismology;Software testing;Fiber reinforced plastics;Axial loads;Concrete bridges;Columns (structural);Retrofitting;},\n%note = {Cyclic lateral loads;Displacement-based designs;Experimental program;Experimental projects;Fibre reinforced polymers;Rehabilitation techniques;Reinforced concrete bridge columns;Service conditions;},\n} \n\n\n
\n
\n\n\n
\n An ongoing research project at Université de Sherbrooke has shown that fibre reinforced polymers (FRPs) enhance ductility as well as flexural capacity and shear resistance. An experimental program was completed on six 2.15-m high column specimens which were tested under combined axial and cyclic lateral loads. The objective of the experimental project presented herein was to test a new strengthening configuration of reinforced-concrete bridge columns using FRP wrapping. The retrofitted columns were subjected to cyclic lateral loads with two varying axial load levels representative of service conditions for bridges and for building, respectively, as well as two wrapping configurations, one based on \"conventional\" design and the other on displacement-based design. The results are analysed in this paper in order to: (i) evaluate the extent of seismic-related damages in FRP retrofitted bridge columns; (ii) compare the resistance and ductility of each column, before and after the retrofit; and (iii) compare the efficiency of conventional and performance-based wrapping configurations. The paper provides a description of the specimens, rehabilitation techniques, and testing apparatus. Results for three of the six columns under service axial load conditions representative of bridge piers are presented and discussed.
© 2006 Composites in Civil Engineering, CICE 2006. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n The promise of implementing machine learning in earthquake engineering: A state-of-the-art review.\n \n \n \n \n\n\n \n Xie, Y.; Ebad Sichani, M.; Padgett, J. E; and DesRoches, R.\n\n\n \n\n\n\n Earthquake Spectra, 36(4): 1769 - 1801. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ThePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202308801779 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {The promise of implementing machine learning in earthquake engineering: A state-of-the-art review},\njournal = {Earthquake Spectra},\nauthor = {Xie, Yazhou and Ebad Sichani, Majid and Padgett, Jamie E and DesRoches, Reginald},\nvolume = {36},\nnumber = {4},\nyear = {2020},\npages = {1769 - 1801},\nissn = {87552930},\nabstract = {<div data-language="eng" data-ev-field="abstract">Machine learning (ML) has evolved rapidly over recent years with the promise to substantially alter and enhance the role of data science in a variety of disciplines. Compared with traditional approaches, ML offers advantages to handle complex problems, provide computational efficiency, propagate and treat uncertainties, and facilitate decision making. Also, the maturing of ML has led to significant advances in not only the main-stream artificial intelligence (AI) research but also other science and engineering fields, such as material science, bioengineering, construction management, and transportation engineering. This study conducts a comprehensive review of the progress and challenges of implementing ML in the earthquake engineering domain. A hierarchical attribute matrix is adopted to categorize the existing literature based on four traits identified in the field, such as ML method, topic area, data resource, and scale of analysis. The state-of-the-art review indicates to what extent ML has been applied in four topic areas of earthquake engineering, including seismic hazard analysis, system identification and damage detection, seismic fragility assessment, and structural control for earthquake mitigation. Moreover, research challenges and the associated future research needs are discussed, which include embracing the next generation of data sharing and sensor technologies, implementing more advanced ML techniques, and developing physics-guided ML models.<br/></div> © The Author(s) 2020.},\nkey = {Earthquake engineering},\n%keywords = {Engineering geology;Hazards;Machine learning;Structural dynamics;Seismic response;Damage detection;Earthquakes;Decision making;Learning systems;Materials handling;Project management;Religious buildings;Computational efficiency;},\n%note = {Construction management;Earthquake mitigations;Hierarchical attributes;Science and engineering;Seismic hazard analysis;State-of-the art reviews;Traditional approaches;Transportation engineering;},\nURL = {http://dx.doi.org/10.1177/8755293020919419},\n} \n\n\n
\n
\n\n\n
\n
Machine learning (ML) has evolved rapidly over recent years with the promise to substantially alter and enhance the role of data science in a variety of disciplines. Compared with traditional approaches, ML offers advantages to handle complex problems, provide computational efficiency, propagate and treat uncertainties, and facilitate decision making. Also, the maturing of ML has led to significant advances in not only the main-stream artificial intelligence (AI) research but also other science and engineering fields, such as material science, bioengineering, construction management, and transportation engineering. This study conducts a comprehensive review of the progress and challenges of implementing ML in the earthquake engineering domain. A hierarchical attribute matrix is adopted to categorize the existing literature based on four traits identified in the field, such as ML method, topic area, data resource, and scale of analysis. The state-of-the-art review indicates to what extent ML has been applied in four topic areas of earthquake engineering, including seismic hazard analysis, system identification and damage detection, seismic fragility assessment, and structural control for earthquake mitigation. Moreover, research challenges and the associated future research needs are discussed, which include embracing the next generation of data sharing and sensor technologies, implementing more advanced ML techniques, and developing physics-guided ML models.
© The Author(s) 2020.\n
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\n \n\n \n \n \n \n \n \n Discussion of \"performance-Based Wind-Resistant Optimization Design for Tall Building Structures\" by Ting Deng, Jiyang Fu, Qingxing Zheng, Jiurong Wu, and Yonglin Pi.\n \n \n \n \n\n\n \n Athanasiou, A.; Stathopoulos, T.; and Tirca, L.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(8). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"DiscussionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202308791819 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Discussion of "performance-Based Wind-Resistant Optimization Design for Tall Building Structures" by Ting Deng, Jiyang Fu, Qingxing Zheng, Jiurong Wu, and Yonglin Pi},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Athanasiou, Anastasia and Stathopoulos, Ted and Tirca, Lucia},\nvolume = {146},\nnumber = {8},\nyear = {2020},\nissn = {07339445},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002754},\n} \n\n\n
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\n \n\n \n \n \n \n \n \n Full-Scale Cyclic Rotation and Shear-Load Testing of Double Web with Top and Seat Angle Beam-Column Connections.\n \n \n \n \n\n\n \n Beland, T.; Tremblay, R.; Hines, E. M.; and Fahnestock, L. A.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(8). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"Full-ScalePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202308791830 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Full-Scale Cyclic Rotation and Shear-Load Testing of Double Web with Top and Seat Angle Beam-Column Connections},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Beland, Thierry and Tremblay, Robert and Hines, Eric M. and Fahnestock, Larry A.},\nvolume = {146},\nnumber = {8},\nyear = {2020},\nissn = {07339445},\nabstract = {Partially restrained beam-column connections such as bolted double web with top and seat angle connections can be used in the gravity load system of steel buildings to develop secondary moment frame action and enhance seismic collapse prevention. To assess the gravity beam-column connection role in lateral reserve capacity, a comprehensive test program was conducted at Ecole Polytechnique Montreal to characterize the nonlinear hysteretic behavior of bolted angle connections subjected to simultaneous gravity shear and rotational demand from the moment frame action. Fifteen full-scale beam-column subassemblages of four different geometries were tested to characterize their deformation pattern and failure modes. The influence of the following critical parameters on the connection hysteretic behavior was investigated: The top and seat angle geometrical parameters, the beam and column sections, the gravity shear load, and the loading history. The envelope curve of each test was mathematically characterized to numerically reproduce the connection behavior. The tested connections exhibited large ductility and significant moment capacity, which translated into a substantial energy dissipation capacity. The use of bolted angles for gravity framing connections could thus be beneficial by enhancing the reserve capacity and providing lateral resistance to mitigate seismic building collapse.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Energy dissipation},\n%keywords = {Geometry;Hysteresis;Software testing;Steel testing;Load testing;Seismology;Bolts;},\n%note = {Beam - column connection;Collapse prevention;Deformation pattern;Different geometry;Hysteretic behavior;Lateral resistance;Significant moments;Substantial energy;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002685},\n} \n\n\n
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\n Partially restrained beam-column connections such as bolted double web with top and seat angle connections can be used in the gravity load system of steel buildings to develop secondary moment frame action and enhance seismic collapse prevention. To assess the gravity beam-column connection role in lateral reserve capacity, a comprehensive test program was conducted at Ecole Polytechnique Montreal to characterize the nonlinear hysteretic behavior of bolted angle connections subjected to simultaneous gravity shear and rotational demand from the moment frame action. Fifteen full-scale beam-column subassemblages of four different geometries were tested to characterize their deformation pattern and failure modes. The influence of the following critical parameters on the connection hysteretic behavior was investigated: The top and seat angle geometrical parameters, the beam and column sections, the gravity shear load, and the loading history. The envelope curve of each test was mathematically characterized to numerically reproduce the connection behavior. The tested connections exhibited large ductility and significant moment capacity, which translated into a substantial energy dissipation capacity. The use of bolted angles for gravity framing connections could thus be beneficial by enhancing the reserve capacity and providing lateral resistance to mitigate seismic building collapse.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Experimental Parametric Characterization of Bolted Angle Connection Behavior.\n \n \n \n \n\n\n \n Beland, T.; Bradley, C. R.; Nelson, J.; Sizemore, J. G.; Davaran, A.; Tremblay, R.; Hines, E. M.; and Fahnestock, L. A.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(8). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202208771436 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental Parametric Characterization of Bolted Angle Connection Behavior},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Beland, Thierry and Bradley, Cameron R. and Nelson, Jessalyn and Sizemore, Joshua G. and Davaran, Ali and Tremblay, Robert and Hines, Eric M. and Fahnestock, Larry A.},\nvolume = {146},\nnumber = {8},\nyear = {2020},\nissn = {07339445},\nabstract = {This article describes an extensive experimental program that was conducted to characterize comprehensively the nonlinear sectional force-displacement response of bolted steel angle semirigid connections. A total of 139 tests were performed to investigate the influence of angle thickness, position of the column bolts, bolt grade, and bolt pretension. The effect of loading sequence was also examined by applying static and dynamic monotonic and cyclic loading. The observed behavior and failure modes are described. Key parameters defining the load-deformation response of the specimens are quantified, including yield strength, initial stiffness, sharpness of the transition between initial and yielding phases, postyielding stiffness properties, peak forces, and deformations at failure. Monotonic test results were used to define a four-parameter power model that reproduces the force-deformation response of the angles. The influence of each geometric parameter, the bolt type, and the loading protocols on the behavior of the bolted angles was also described. The tests showed that strength and stiffness increased when angle thickness increased, and decreased when the distance between the heel and the column bolt increased. The force-deformation response of monotonic tests can be used to predict the backbone of cyclic and seismic responses. The angles subjected to cyclic and seismic tests, however, developed stable hysteretic response characterized by gradual softening, strength degradation, and smaller ultimate deformations compared with those subjected to monotonic loading.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Seismic response},\n%keywords = {Outages;Stiffness;Testing;Bolts;Deformation;},\n%note = {Experimental program;Force-displacement response;Load-deformation response;Monotonic and cyclic loading;Parametric characterization;Semirigid connections;Stiffness properties;Strength and stiffness;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002662},\n} \n\n\n
\n
\n\n\n
\n This article describes an extensive experimental program that was conducted to characterize comprehensively the nonlinear sectional force-displacement response of bolted steel angle semirigid connections. A total of 139 tests were performed to investigate the influence of angle thickness, position of the column bolts, bolt grade, and bolt pretension. The effect of loading sequence was also examined by applying static and dynamic monotonic and cyclic loading. The observed behavior and failure modes are described. Key parameters defining the load-deformation response of the specimens are quantified, including yield strength, initial stiffness, sharpness of the transition between initial and yielding phases, postyielding stiffness properties, peak forces, and deformations at failure. Monotonic test results were used to define a four-parameter power model that reproduces the force-deformation response of the angles. The influence of each geometric parameter, the bolt type, and the loading protocols on the behavior of the bolted angles was also described. The tests showed that strength and stiffness increased when angle thickness increased, and decreased when the distance between the heel and the column bolt increased. The force-deformation response of monotonic tests can be used to predict the backbone of cyclic and seismic responses. The angles subjected to cyclic and seismic tests, however, developed stable hysteretic response characterized by gradual softening, strength degradation, and smaller ultimate deformations compared with those subjected to monotonic loading.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Estimation of aboveground oil palm biomass in a mature plantation in the Congo Basin.\n \n \n \n \n\n\n \n Migolet, P.; Goita, K.; Ngomanda, A.; and Biyogo, A. P. M.\n\n\n \n\n\n\n Forests, 11(5). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"EstimationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202308781811 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Estimation of aboveground oil palm biomass in a mature plantation in the Congo Basin},\njournal = {Forests},\nauthor = {Migolet, Pierre and Goita, Kalifa and Ngomanda, Alfred and Biyogo, Andreana Paola Mekui},\nvolume = {11},\nnumber = {5},\nyear = {2020},\nissn = {19994907},\nabstract = {Agro-industrial oil palm plantations are becoming increasingly established in the Congo Basin (West Equatorial Africa) for mainly economic reasons. Knowledge of oil palm capacity to sequester carbon requires biomass estimates. This study implemented local and regional methods for estimating palm biomass in a mature plantation, using destructive sampling. Eighteen 35-year-old oil palms with breast height diameters (DBH) between 48 and 58 cm were felled and sectioned in a plantation located in Makouke, central Gabon. Field and laboratory measurements determined the biomasses of different tree compartments (fruits, leaflets, petioles, rachises, stems). Fruits and leaflets contributed an average of 6% to total aboveground palm biomass, which petioles accounted for 8%, rachises for 13% and the stem, 73%. The best allometric equation for estimating stem biomass was obtained with a composite variable, formulated as DBH<sup>2</sup> X stem height, weighted by tissue infra-density. For leaf biomass (fruits + leaflets + petioles + rachises), the equation was of a similar form, but included the leaf number instead of infra-density. The allometric model combining the stem and leaf biomass yielded the best estimates of the total aboveground oil palm biomass (coefficient of determination (r<sup>2</sup>) = 0.972, p < 0.0001, relative root mean square error (RMSE) = 5%). Yet, the model was difficult to implement in practice, given the limited availability of variables such as the leaf number. The total aboveground biomass could be estimated with comparable results using DBH<sup>2</sup> X stem height, weighted by the infra-density (r<sup>2</sup> = 0.961, p < 0.0001, relative RMSE (%RMSE) = 5.7%). A simpler model excluding infra-density did not severely compromise results (R<sup>2</sup> = 0.939, p < 0.0003, %RMSE = 8.2%). We also examined existing allometric models, established elsewhere in the world, for estimating aboveground oil palm biomass in our study area. These models exhibited performances inferior to the best local allometric equations that were developed.<br/> © 2020 by the authors.},\nkey = {Fruits},\n%keywords = {Biomass;Palm oil;Mean square error;},\n%note = {Above ground biomass;Allometric equations;Coefficient of determination;Destructive sampling;Equatorial Africa;Laboratory measurements;Oil palm plantations;Root mean square errors;},\nURL = {http://dx.doi.org/10.3390/F11050544},\n} \n\n\n
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\n Agro-industrial oil palm plantations are becoming increasingly established in the Congo Basin (West Equatorial Africa) for mainly economic reasons. Knowledge of oil palm capacity to sequester carbon requires biomass estimates. This study implemented local and regional methods for estimating palm biomass in a mature plantation, using destructive sampling. Eighteen 35-year-old oil palms with breast height diameters (DBH) between 48 and 58 cm were felled and sectioned in a plantation located in Makouke, central Gabon. Field and laboratory measurements determined the biomasses of different tree compartments (fruits, leaflets, petioles, rachises, stems). Fruits and leaflets contributed an average of 6% to total aboveground palm biomass, which petioles accounted for 8%, rachises for 13% and the stem, 73%. The best allometric equation for estimating stem biomass was obtained with a composite variable, formulated as DBH2 X stem height, weighted by tissue infra-density. For leaf biomass (fruits + leaflets + petioles + rachises), the equation was of a similar form, but included the leaf number instead of infra-density. The allometric model combining the stem and leaf biomass yielded the best estimates of the total aboveground oil palm biomass (coefficient of determination (r2) = 0.972, p < 0.0001, relative root mean square error (RMSE) = 5%). Yet, the model was difficult to implement in practice, given the limited availability of variables such as the leaf number. The total aboveground biomass could be estimated with comparable results using DBH2 X stem height, weighted by the infra-density (r2 = 0.961, p < 0.0001, relative RMSE (%RMSE) = 5.7%). A simpler model excluding infra-density did not severely compromise results (R2 = 0.939, p < 0.0003, %RMSE = 8.2%). We also examined existing allometric models, established elsewhere in the world, for estimating aboveground oil palm biomass in our study area. These models exhibited performances inferior to the best local allometric equations that were developed.
© 2020 by the authors.\n
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\n \n\n \n \n \n \n \n \n Impact and blast behavior of seismically-detailed RC and UHPFRC-Strengthened columns.\n \n \n \n \n\n\n \n Lee, J.; Aoude, H.; Yoon, Y.; and Mitchell, D.\n\n\n \n\n\n\n International Journal of Impact Engineering, 143. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202208719424 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact and blast behavior of seismically-detailed RC and UHPFRC-Strengthened columns},\njournal = {International Journal of Impact Engineering},\nauthor = {Lee, Jin-Young and Aoude, Hassan and Yoon, Young-Soo and Mitchell, Denis},\nvolume = {143},\nyear = {2020},\nissn = {0734743X},\nabstract = {In order to investigate the blast and impact resistance of seismically designed and detailed RC columns, six RC columns (160 × 160 × 2468 mm) were constructed and tested using shock-tube and drop-weight impact test facilities. The influence of seismic detailing, with higher amounts of transverse reinforcement, was investigated. In addition, the effects of retrofitting using ultra-high performance fiber-reinforced concrete (UHPFRC) jacketing were studied. Non-linear finite element analyses were also carried out to predict the experimental results. The test results demonstrated that the use of seismic detailing improves the blast resistance of columns, resulting in reductions of the maximum and residual displacements at the mid height of the column, better control of cracks, and an ability to sustain larger blast loads. However, for drop-weight impact loading, the seismically detailed column did not show significant improvements in the tolerance to local damage and the control of displacements. In contrast, the use of UHPFRC jacketing in combination with seismic detailing showed excellent control of displacements and increased load carrying capacity under both blast and impact loadings.<br/> © 2020 Elsevier Ltd},\nkey = {Shock tubes},\n%keywords = {Blast resistance;High performance concrete;Reinforced concrete;Drops;Seismology;},\n%note = {Drop weight impact;Impact loadings;Local damage;Non-linear finite-element analysis;Residual displacement;Seismic detailing;Transverse reinforcement;Ultra-high-performance fiber-reinforced concrete;},\nURL = {http://dx.doi.org/10.1016/j.ijimpeng.2020.103628},\n} \n\n\n
\n
\n\n\n
\n In order to investigate the blast and impact resistance of seismically designed and detailed RC columns, six RC columns (160 × 160 × 2468 mm) were constructed and tested using shock-tube and drop-weight impact test facilities. The influence of seismic detailing, with higher amounts of transverse reinforcement, was investigated. In addition, the effects of retrofitting using ultra-high performance fiber-reinforced concrete (UHPFRC) jacketing were studied. Non-linear finite element analyses were also carried out to predict the experimental results. The test results demonstrated that the use of seismic detailing improves the blast resistance of columns, resulting in reductions of the maximum and residual displacements at the mid height of the column, better control of cracks, and an ability to sustain larger blast loads. However, for drop-weight impact loading, the seismically detailed column did not show significant improvements in the tolerance to local damage and the control of displacements. In contrast, the use of UHPFRC jacketing in combination with seismic detailing showed excellent control of displacements and increased load carrying capacity under both blast and impact loadings.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n On the Response of Polyethylene Pipes to Lateral Ground Movements: Insights from Finite-Discrete Element Analysis.\n \n \n \n \n\n\n \n Meidani, M.; Meguid, M. A.; and Chouinard, L. E.\n\n\n \n\n\n\n International Journal of Geosynthetics and Ground Engineering, 6(2). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"OnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202208741138 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {On the Response of Polyethylene Pipes to Lateral Ground Movements: Insights from Finite-Discrete Element Analysis},\njournal = {International Journal of Geosynthetics and Ground Engineering},\nauthor = {Meidani, Masood and Meguid, Mohamed A. and Chouinard, Luc E.},\nvolume = {6},\nnumber = {2},\nyear = {2020},\nissn = {21999260},\nabstract = {The current knowledge of the behaviour of polyethylene pipes subjected to lateral soil movement is limited and the commonly used design equations were initially developed for steel pipes. In this study, an attempt has been made to understand the soil–structure interaction using a three-dimensional finite-discrete (FE-DE) element model of a medium density polyethylene (MDPE) pipe buried in dense sand and subjected to lateral soil movement. The soil particles are modelled using discrete elements, while the pipe is modelled using finite elements and interface elements are introduced to transfer the forces between the two domains. Validation is performed using experimental data. This study shows that, when a pipe section experiences lateral movement induced by two symmetrically applied loads, the pipe will resist the imposed lateral forces by bending. Particle displacement patterns show that passive wedges develop locally close to the applied loads and the remaining pipe sections experience negligible deformation. Furthermore, it is found that the current expressions used to estimate the ultimate lateral soil force on buried pipes in granular soil, which is generally developed for rigid steel pipes, should be used with caution as they may overestimate the soil load on flexible MDPE pipes.<br/> © 2020, Springer Nature Switzerland AG.},\nkey = {Steel pipe},\n%keywords = {Medium density polyethylenes;Soils;},\n%note = {Current expression;Discrete element analysis;Discrete elements;Interface elements;Lateral ground movement;Lateral soil movement;Particle displacement;Polyethylene pipes;},\nURL = {http://dx.doi.org/10.1007/s40891-020-00201-6},\n} \n\n\n
\n
\n\n\n
\n The current knowledge of the behaviour of polyethylene pipes subjected to lateral soil movement is limited and the commonly used design equations were initially developed for steel pipes. In this study, an attempt has been made to understand the soil–structure interaction using a three-dimensional finite-discrete (FE-DE) element model of a medium density polyethylene (MDPE) pipe buried in dense sand and subjected to lateral soil movement. The soil particles are modelled using discrete elements, while the pipe is modelled using finite elements and interface elements are introduced to transfer the forces between the two domains. Validation is performed using experimental data. This study shows that, when a pipe section experiences lateral movement induced by two symmetrically applied loads, the pipe will resist the imposed lateral forces by bending. Particle displacement patterns show that passive wedges develop locally close to the applied loads and the remaining pipe sections experience negligible deformation. Furthermore, it is found that the current expressions used to estimate the ultimate lateral soil force on buried pipes in granular soil, which is generally developed for rigid steel pipes, should be used with caution as they may overestimate the soil load on flexible MDPE pipes.
© 2020, Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n Simplified Analytical Model for Interfacial Bond Strength of Deformed Steel Rebars Embedded in Pre-cracked Concrete.\n \n \n \n \n\n\n \n Mousavi, S. S.; Guizani, L.; and Ouellet-Plamondon, C. M.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(8). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"SimplifiedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202208716886 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Simplified Analytical Model for Interfacial Bond Strength of Deformed Steel Rebars Embedded in Pre-cracked Concrete},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Mousavi, Seyed Sina and Guizani, Lotfi and Ouellet-Plamondon, Claudiane M.},\nvolume = {146},\nnumber = {8},\nyear = {2020},\nissn = {07339445},\nabstract = {Although extensive bond models have been developed for use in the numerical simulation of uncracked reinforced concrete, no simplified method exists providing satisfactory accuracy and efficiency for pre-cracked concrete. This paper intends, therefore, to explain bond failure mechanisms in pre-cracked concrete - as compared to intact concrete - using a simplified theoretical model. The main bond failure mechanisms considered in this study involve: (1) crushing a wedge-shaped concrete block using reinforcing bar ribs, and (2) tearing off the concrete between two adjacent ribs. Based on these scenarios, analytical expressions are derived to predict the average bond strength for uncracked concrete, in which the bearing angle, the rib face angle, the rib height, the rib spacing, and the friction coefficient between surfaces are the key parameters. A modified version of this model is proposed to predict the maximum bond strength of rebars embedded in pre-cracked concrete by introducing a reduction factor of surrounding confinement caused by the pre-cracking phenomenon. An experimental program was also conducted to validate the proposed models. Experimental results emphasize the crucial impact of the pre-cracking phenomenon on both the bond strength and the failure pattern. Analysis results show that the bearing angle and surrounding confinement by concrete cover are crucial parameters controlling bond failure of rebars in pre-cracked concrete. The results also indicate that as the crack width corresponding to the low confinement increases, rib sliding is expected to occur as an illustration of weak interfacial strength. The proposed bond mechanism models are also in good agreement with the experimental observations.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Reinforced concrete},\n%keywords = {Failure (mechanical);Bearings (machine parts);Bond strength (materials);Numerical methods;Friction;},\n%note = {Analytical expressions;Crucial parameters;Experimental program;Friction coefficients;Interfacial bond strength;Interfacial strength;Simplified method;Theoretical modeling;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002687},\n} \n\n\n
\n
\n\n\n
\n Although extensive bond models have been developed for use in the numerical simulation of uncracked reinforced concrete, no simplified method exists providing satisfactory accuracy and efficiency for pre-cracked concrete. This paper intends, therefore, to explain bond failure mechanisms in pre-cracked concrete - as compared to intact concrete - using a simplified theoretical model. The main bond failure mechanisms considered in this study involve: (1) crushing a wedge-shaped concrete block using reinforcing bar ribs, and (2) tearing off the concrete between two adjacent ribs. Based on these scenarios, analytical expressions are derived to predict the average bond strength for uncracked concrete, in which the bearing angle, the rib face angle, the rib height, the rib spacing, and the friction coefficient between surfaces are the key parameters. A modified version of this model is proposed to predict the maximum bond strength of rebars embedded in pre-cracked concrete by introducing a reduction factor of surrounding confinement caused by the pre-cracking phenomenon. An experimental program was also conducted to validate the proposed models. Experimental results emphasize the crucial impact of the pre-cracking phenomenon on both the bond strength and the failure pattern. Analysis results show that the bearing angle and surrounding confinement by concrete cover are crucial parameters controlling bond failure of rebars in pre-cracked concrete. The results also indicate that as the crack width corresponding to the low confinement increases, rib sliding is expected to occur as an illustration of weak interfacial strength. The proposed bond mechanism models are also in good agreement with the experimental observations.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Metamodel-Based Seismic Fragility Analysis of Concrete Gravity Dams.\n \n \n \n \n\n\n \n Segura, R.; Padgett, J. E.; and Paultre, P.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(7). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"Metamodel-BasedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202108702187 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Metamodel-Based Seismic Fragility Analysis of Concrete Gravity Dams},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Segura, Rocio and Padgett, Jamie E. and Paultre, Patrick},\nvolume = {146},\nnumber = {7},\nyear = {2020},\nissn = {07339445},\nabstract = {Probabilistic methods, such as fragility analysis, have been developed as a promising alternative for the seismic assessment of dam-type structures. However, given the costly reevaluation of the numerical model simulations, the effect of the model parameters likely to affect the seismic fragility of the system is frequently overlooked. Acknowledging the lack of the thorough exploration of different machine learning techniques to develop surrogates or metamodels that efficiently approximate the seismic response of dams, this study provides insight on viable metamodels for the seismic assessment of gravity dams for use in fragility analysis. The proposed methodology to generate multivariate fragility functions offers efficiency while accounting for the most critical model parameter variation influencing the dam seismic fragility. From the analysis of these models, practical design recommendations can be formulated. The procedure presented herein is applied to a case study dam in northeastern Canada, where the polynomial response surface of order 4 (PRS O4) came up as the most viable metamodel among those considered. Its fragility is assessed through comparison with the current safety guidelines to establish a range of usable model parameter values in terms of the concrete-rock angle of friction, drain efficiency, and concrete-rock cohesion.<br/> © 2020 This work is made available under the terms of the Creative Commons Attribution 4.0 International license,.},\nkey = {Efficiency},\n%keywords = {Concrete dams;Seismology;Drain current;Learning systems;Concretes;Gravity dams;Seismic design;},\n%note = {Concrete gravity dams;Design recommendations;Fragility analysis;Fragility function;Machine learning techniques;Numerical model simulations;Probabilistic methods;Seismic fragility analysis;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002629},\n} \n\n\n
\n
\n\n\n
\n Probabilistic methods, such as fragility analysis, have been developed as a promising alternative for the seismic assessment of dam-type structures. However, given the costly reevaluation of the numerical model simulations, the effect of the model parameters likely to affect the seismic fragility of the system is frequently overlooked. Acknowledging the lack of the thorough exploration of different machine learning techniques to develop surrogates or metamodels that efficiently approximate the seismic response of dams, this study provides insight on viable metamodels for the seismic assessment of gravity dams for use in fragility analysis. The proposed methodology to generate multivariate fragility functions offers efficiency while accounting for the most critical model parameter variation influencing the dam seismic fragility. From the analysis of these models, practical design recommendations can be formulated. The procedure presented herein is applied to a case study dam in northeastern Canada, where the polynomial response surface of order 4 (PRS O4) came up as the most viable metamodel among those considered. Its fragility is assessed through comparison with the current safety guidelines to establish a range of usable model parameter values in terms of the concrete-rock angle of friction, drain efficiency, and concrete-rock cohesion.
© 2020 This work is made available under the terms of the Creative Commons Attribution 4.0 International license,.\n
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\n \n\n \n \n \n \n \n \n Single and Multiscale Bubble Motions Beneath an Inclined Downward-Facing Surface in the Aluminum Reduction Cell.\n \n \n \n \n\n\n \n Sun, M.; Mollaabbasi, R.; Li, B.; Alamdari, H.; Fafard, M.; and Taghavi, S. M.\n\n\n \n\n\n\n Industrial and Engineering Chemistry Research, 59(17): 8403 - 8415. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"SinglePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202108705749 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Single and Multiscale Bubble Motions Beneath an Inclined Downward-Facing Surface in the Aluminum Reduction Cell},\njournal = {Industrial and Engineering Chemistry Research},\nauthor = {Sun, Meijia and Mollaabbasi, Roozbeh and Li, Baokuan and Alamdari, Houshang and Fafard, Mario and Taghavi, Seyed Mohammad},\nvolume = {59},\nnumber = {17},\nyear = {2020},\npages = {8403 - 8415},\nissn = {08885885},\nabstract = {Three-dimensional (3D) transient mathematical models are developed to explore the single and multiscale bubble dynamics beneath the inclined downward-facing surface of the anode in an aluminum reduction cell. The single bubble motion is traced by the volume of fluid (VOF) method. For the multiscale bubble, the discrete phase model (DPM) combined with the VOF approach is used to track the dispersed microbubbles' trajectories and trace the continuous macrobubbles' surfaces, respectively. A discrete-continuum transition (DCT) model is proposed to convert the dispersed bubbles to continuous ones and deal with the multiscale motions under the inclined anode surface. The predicted results of the sliding bubble velocity and the gas coverage are in a good agreement with the experimental data from the literature. On increasing the inclination angle, the detachment time of the single bubble from the nucleation site decreases while the sliding velocity increases. The gas coverage, bubble size, and thickness of multiscale bubbles decrease on increasing the inclination angle.<br/> Copyright © 2020 American Chemical Society.},\nkey = {Anodes},\n%keywords = {Ore reduction;Bubbles (in fluids);Facings;Electrolytic cells;Aluminum;},\n%note = {Aluminum reduction cells;Continuum transitions;Discrete phase model;Downward facing surfaces;Inclination angles;Sliding velocities;Threedimensional (3-d);Volume of fluid method;},\nURL = {http://dx.doi.org/10.1021/acs.iecr.0c00793},\n} \n\n\n
\n
\n\n\n
\n Three-dimensional (3D) transient mathematical models are developed to explore the single and multiscale bubble dynamics beneath the inclined downward-facing surface of the anode in an aluminum reduction cell. The single bubble motion is traced by the volume of fluid (VOF) method. For the multiscale bubble, the discrete phase model (DPM) combined with the VOF approach is used to track the dispersed microbubbles' trajectories and trace the continuous macrobubbles' surfaces, respectively. A discrete-continuum transition (DCT) model is proposed to convert the dispersed bubbles to continuous ones and deal with the multiscale motions under the inclined anode surface. The predicted results of the sliding bubble velocity and the gas coverage are in a good agreement with the experimental data from the literature. On increasing the inclination angle, the detachment time of the single bubble from the nucleation site decreases while the sliding velocity increases. The gas coverage, bubble size, and thickness of multiscale bubbles decrease on increasing the inclination angle.
Copyright © 2020 American Chemical Society.\n
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\n \n\n \n \n \n \n \n \n A new approach for generating optimal GLDAS hydrological products and uncertainties.\n \n \n \n \n\n\n \n Fatolazadeh, F.; Eshagh, M.; and Goita, K.\n\n\n \n\n\n\n Science of the Total Environment, 730. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20202008649966 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A new approach for generating optimal GLDAS hydrological products and uncertainties},\njournal = {Science of the Total Environment},\nauthor = {Fatolazadeh, Farzam and Eshagh, Mehdi and Goita, Kalifa},\nvolume = {730},\nyear = {2020},\nissn = {00489697},\nabstract = {This study proposes a new approach that can be used to generate the optimal surface state information and associated uncertainties from the estimates provided by the six land surface models used by the Global Land Data Assimilation System (GLDAS). The Förstner and best quadratic unbiased variance component estimators are used simultaneously with the least-squares method to calculate optimal values and the associated uncertainties. To demonstrate the concept, the research focused on three GLDAS hydrological products, namely soil moisture (SM), snow water equivalent (SWE), and canopy water (CAN) over the Canadian Prairies. When the Förstner estimator is applied, the estimated SM and SWE differ from their corresponding mean values by 26 mm and 9 mm respectively. Almost similar result was found with the best quadratic estimator. The estimated maximum uncertainties of each component including SM, SWE and CAN vary from year to year (e.g. 35 mm in 2006, 12 mm in 2007 and 2009 and 0.1 mm in 2001, respectively). The uncertainties of the total water storage (TWS) are almost similar to that of SM, which contributes more importantly to TWS in the area considered. The results obtained by the two proposed estimators were compared to the waterGAP hydrological models (WGHM), and to the Gravity Recovery and Climate Experiment (GRACE) terrestrial water storage anomalies. The optimal SWE anomalies generated from GLDAS using the proposed approach show a maximum correlation of r = 0.97 with the WGHM SWE anomalies. The optimal TWS anomalies have a correlation of r = 0.91 with WGHM, and r = 0.71 with GRACE. However, the correlation jumps to r = 0.81 when GRACE TWS is corrected for groundwater signals (with a mean RMSE of 8.5 mm). The RMSE and mean absolute error between our proposed methods and WGHM and GRACE are better than those obtained with each individual LSM or their average value. No significant mean bias error is observed in each case. Finally, the analysis of the time-lag characteristics of the resonance period between the results and their coherence was done by using a cross wavelet transform and a wavelet coherence analysis.<br/> © 2020 Elsevier B.V.},\nkey = {Soil moisture},\n%keywords = {Least squares approximations;Groundwater;Climate models;Digital storage;Snow;Uncertainty analysis;},\n%note = {Cross-wavelet transform;Gravity recovery and climate experiments;Land data assimilation systems;Least squares methods;Maximum correlations;Snow water equivalent;Terrestrial water storage;Variance-component estimators;},\nURL = {http://dx.doi.org/10.1016/j.scitotenv.2020.138932},\n} \n\n\n
\n
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\n This study proposes a new approach that can be used to generate the optimal surface state information and associated uncertainties from the estimates provided by the six land surface models used by the Global Land Data Assimilation System (GLDAS). The Förstner and best quadratic unbiased variance component estimators are used simultaneously with the least-squares method to calculate optimal values and the associated uncertainties. To demonstrate the concept, the research focused on three GLDAS hydrological products, namely soil moisture (SM), snow water equivalent (SWE), and canopy water (CAN) over the Canadian Prairies. When the Förstner estimator is applied, the estimated SM and SWE differ from their corresponding mean values by 26 mm and 9 mm respectively. Almost similar result was found with the best quadratic estimator. The estimated maximum uncertainties of each component including SM, SWE and CAN vary from year to year (e.g. 35 mm in 2006, 12 mm in 2007 and 2009 and 0.1 mm in 2001, respectively). The uncertainties of the total water storage (TWS) are almost similar to that of SM, which contributes more importantly to TWS in the area considered. The results obtained by the two proposed estimators were compared to the waterGAP hydrological models (WGHM), and to the Gravity Recovery and Climate Experiment (GRACE) terrestrial water storage anomalies. The optimal SWE anomalies generated from GLDAS using the proposed approach show a maximum correlation of r = 0.97 with the WGHM SWE anomalies. The optimal TWS anomalies have a correlation of r = 0.91 with WGHM, and r = 0.71 with GRACE. However, the correlation jumps to r = 0.81 when GRACE TWS is corrected for groundwater signals (with a mean RMSE of 8.5 mm). The RMSE and mean absolute error between our proposed methods and WGHM and GRACE are better than those obtained with each individual LSM or their average value. No significant mean bias error is observed in each case. Finally, the analysis of the time-lag characteristics of the resonance period between the results and their coherence was done by using a cross wavelet transform and a wavelet coherence analysis.
© 2020 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n 22 μW, 5.1 ps LSB, 5.5 ps RMS jitter Vernier time-to-digital converter in CMOS 65 nm for single photon avalanche diode array.\n \n \n \n \n\n\n \n Nolet, F.; Roy, N.; Carrier, S.; Bouchard, J.; Fontaine, R.; Charlebois, S.; and Pratte, J.\n\n\n \n\n\n\n Electronics Letters, 56(9): 456 - 459. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"22Paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201908637223 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {22 μW, 5.1 ps LSB, 5.5 ps RMS jitter Vernier time-to-digital converter in CMOS 65 nm for single photon avalanche diode array},\njournal = {Electronics Letters},\nauthor = {Nolet, F. and Roy, N. and Carrier, S. and Bouchard, J. and Fontaine, R. and Charlebois, S.A. and Pratte, J.-F.},\nvolume = {56},\nnumber = {9},\nyear = {2020},\npages = {456 - 459},\nissn = {00135194},\nabstract = {A Vernier ring-oscillator-based time-to-digital converter (TDC) with a new prelogic is presented. Experimental results show that the proposed architecture achieve a 5.5 ps RMS timing jitter with a 5.1 ps LSB within an area of 0.00151 mm<sup>2</sup>. Thanks to the new prelogic circuit, the power consumption of the circuit was optimised to 22 mW at a rate of 1 Mevents/s for a dynamic range of 4 ns. The area, timing jitter and power consumption make the TDC suitable for an array of electronic readout in a position emission tomography single photon avalanche diode based detectors.<br/> © The Institution of Engineering and Technology 2020.},\nkey = {Electric power utilization},\n%keywords = {Frequency converters;Photons;Particle beams;Avalanche diodes;Timing circuits;Signal processing;CMOS integrated circuits;},\n%note = {Dynamic range;Electronic readout;Position emission tomography;Proposed architectures;Ring oscillator;Single photon avalanche diode;Single-photon avalanche diode arrays;Time to digital converters;},\nURL = {http://dx.doi.org/10.1049/el.2019.4105},\n} \n\n\n
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\n A Vernier ring-oscillator-based time-to-digital converter (TDC) with a new prelogic is presented. Experimental results show that the proposed architecture achieve a 5.5 ps RMS timing jitter with a 5.1 ps LSB within an area of 0.00151 mm2. Thanks to the new prelogic circuit, the power consumption of the circuit was optimised to 22 mW at a rate of 1 Mevents/s for a dynamic range of 4 ns. The area, timing jitter and power consumption make the TDC suitable for an array of electronic readout in a position emission tomography single photon avalanche diode based detectors.
© The Institution of Engineering and Technology 2020.\n
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\n \n\n \n \n \n \n \n \n Rotational Capacity of Bolted Double-Web-Angle Beam-Column Gravity Connections through Full-Scale Experimental Testing.\n \n \n \n \n\n\n \n Beland, T.; Tremblay, R.; Hines, E. M.; and Fahnestock, L. A.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(7). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"RotationalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201908617706 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Rotational Capacity of Bolted Double-Web-Angle Beam-Column Gravity Connections through Full-Scale Experimental Testing},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Beland, Thierry and Tremblay, Robert and Hines, Eric M. and Fahnestock, Larry A.},\nvolume = {146},\nnumber = {7},\nyear = {2020},\nissn = {07339445},\nabstract = {Double-web-angle beam-column connections are used extensively for gravity framing in steel buildings. Although they are designed to resist shear and to allow rotation, they still possess moment capacity that may contribute to lateral resistance, particularly in extreme-load scenarios. To characterize the nonlinear hysteretic behavior of bolted angle connections subjected to simultaneous gravity shear and rotational demand from the moment frame action, a comprehensive test program was conducted. Eight full-scale beam-column subassemblages of two different geometries were tested to characterize their hysteretic behavior and failure modes in relationship to the following parameters: angle geometry, beam and column section properties, gravity shear load, and loading history. The backbone curve of each test was calibrated numerically to reproduce the connection behavior. Double-web-angle connections exhibited large rotational capacity and stable hysteretic behavior. Their stable hysteretic behavior may be of interest in terms of a reserve capacity because it can provide sufficient rotational capacity to the gravity frame and mitigate building collapse in low-ductility braced frames.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Software testing},\n%keywords = {Bolts;Hysteresis;Steel testing;Steel beams and girders;Structural frames;},\n%note = {Building collapse;Different geometry;Experimental testing;Full scale beams;Hysteretic behavior;Lateral resistance;Reserve capacity;Rotational capacity;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002661},\n} \n\n\n
\n
\n\n\n
\n Double-web-angle beam-column connections are used extensively for gravity framing in steel buildings. Although they are designed to resist shear and to allow rotation, they still possess moment capacity that may contribute to lateral resistance, particularly in extreme-load scenarios. To characterize the nonlinear hysteretic behavior of bolted angle connections subjected to simultaneous gravity shear and rotational demand from the moment frame action, a comprehensive test program was conducted. Eight full-scale beam-column subassemblages of two different geometries were tested to characterize their hysteretic behavior and failure modes in relationship to the following parameters: angle geometry, beam and column section properties, gravity shear load, and loading history. The backbone curve of each test was calibrated numerically to reproduce the connection behavior. Double-web-angle connections exhibited large rotational capacity and stable hysteretic behavior. Their stable hysteretic behavior may be of interest in terms of a reserve capacity because it can provide sufficient rotational capacity to the gravity frame and mitigate building collapse in low-ductility braced frames.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Effects of Stub Hole Button on Anode of Aluminum Reduction Cell.\n \n \n \n \n\n\n \n Li, T.; Tao, W.; Chaouki, H.; Wang, Z.; Liu, X.; Fafard, M.; and Yang, Y.\n\n\n \n\n\n\n JOM, 72(6): 2426 - 2435. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"EffectsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201808610112 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effects of Stub Hole Button on Anode of Aluminum Reduction Cell},\njournal = {JOM},\nauthor = {Li, Tuofu and Tao, Wenju and Chaouki, Hicham and Wang, Zhaowen and Liu, Xiaozhen and Fafard, Mario and Yang, Youjian},\nvolume = {72},\nnumber = {6},\nyear = {2020},\npages = {2426 - 2435},\nissn = {10474838},\nabstract = {In China, a special anode design with a button in each stub hole is adopted by many smelters. To investigate the effects of the stub hole button on the anode, numerical simulations of the anode rodding process and the running process of the conventional anode without a stub hole button (design A) and the special design (design B) were conducted. In anode rodding, design B shows worse cooling capacity than design A, while the air gap of design B (0.39 mm to 0.94 mm) is larger than that of design A (0.3 mm to 0.45 mm). During the anode running process, the stub hole button could contact neither the cast iron nor the stub, and the anode voltage drop of design B is 26 mV larger than that of design A because the larger air gap deteriorates the cast iron–carbon contact. In conclusion, the stub hole button should be removed.<br/> © 2020, The Minerals, Metals & Materials Society.},\nkey = {Anodes},\n%keywords = {Cast iron;Ore reduction;Smelting;Electrolytic cells;Aluminum metallography;Aluminum;},\n%note = {Air-gaps;Aluminum reduction cells;Anode voltage drops;Cooling Capacity;Running process;},\nURL = {http://dx.doi.org/10.1007/s11837-020-04162-z},\n} \n\n\n
\n
\n\n\n
\n In China, a special anode design with a button in each stub hole is adopted by many smelters. To investigate the effects of the stub hole button on the anode, numerical simulations of the anode rodding process and the running process of the conventional anode without a stub hole button (design A) and the special design (design B) were conducted. In anode rodding, design B shows worse cooling capacity than design A, while the air gap of design B (0.39 mm to 0.94 mm) is larger than that of design A (0.3 mm to 0.45 mm). During the anode running process, the stub hole button could contact neither the cast iron nor the stub, and the anode voltage drop of design B is 26 mV larger than that of design A because the larger air gap deteriorates the cast iron–carbon contact. In conclusion, the stub hole button should be removed.
© 2020, The Minerals, Metals & Materials Society.\n
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\n \n\n \n \n \n \n \n \n CFD simulations can be adequate for the evaluation of snow effects on structures.\n \n \n \n \n\n\n \n Tominaga, Y.; and Stathopoulos, T.\n\n\n \n\n\n\n Building Simulation, 13(4): 729 - 737. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"CFDPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201908613410 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {CFD simulations can be adequate for the evaluation of snow effects on structures},\njournal = {Building Simulation},\nauthor = {Tominaga, Yoshihide and Stathopoulos, Ted},\nvolume = {13},\nnumber = {4},\nyear = {2020},\npages = {729 - 737},\nissn = {19963599},\nURL = {http://dx.doi.org/10.1007/s12273-020-0643-0},\n} \n\n\n
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\n \n\n \n \n \n \n \n \n Analytical modeleing of contact mechanics of helical gear tooth by considering surface roughness effects.\n \n \n \n \n\n\n \n Hodaei, M.; Rabbani, V.; Maghoul, P.; Bahari, A.; Farhang, K.; and Wu, N.\n\n\n \n\n\n\n Journal of Adhesion Science and Technology, 34(20): 2176 - 2199. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"AnalyticalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201808593408 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Analytical modeleing of contact mechanics of helical gear tooth by considering surface roughness effects},\njournal = {Journal of Adhesion Science and Technology},\nauthor = {Hodaei, M. and Rabbani, V. and Maghoul, P. and Bahari, A. and Farhang, K. and Wu, N.},\nvolume = {34},\nnumber = {20},\nyear = {2020},\npages = {2176 - 2199},\nissn = {01694243},\nabstract = {Release of metal debris from a pair of gear teeth is a consequence of their contact. Any excessive metal debris can lead to the onset of fatigue and failure. This paper aims to derive a contact mechanics-based model to obtain the energy absorption of helical gear teeth. The proposed model includes the roughness effect of teeth contact surfaces. The mean value of the asperity summit curvature, the standard deviation of the asperity height distribution and the area density of the asperity height distribution are the three statistical parameters that describe the micron-scale surface roughness. An explicit approximation is obtained to relate the contact load and the minimum surface separation and to estimate the energy loss. Then an analytical expression is derived for the plastic energy dissipation per cycle as a function of plasticity index for gear teeth. The proposed function can be applied in the design of gears by engineers and manufacturers. Additionally, a pertinent lumped mass at the area of interaction is assumed to describe the contact frequency and damping ratio using a nonlinear dynamic model.<br/> © 2020 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Surface roughness},\n%keywords = {Vibration analysis;Deformation;Helical gears;Energy dissipation;Gear teeth;Energy conversion;Debris;},\n%note = {Analytical expressions;Contact Mechanics;Plastic energy dissipation;Plasticity indices;Roughness effects;Standard deviation;Statistical parameters;Surface roughness effects;},\nURL = {http://dx.doi.org/10.1080/01694243.2020.1754638},\n} \n\n\n
\n
\n\n\n
\n Release of metal debris from a pair of gear teeth is a consequence of their contact. Any excessive metal debris can lead to the onset of fatigue and failure. This paper aims to derive a contact mechanics-based model to obtain the energy absorption of helical gear teeth. The proposed model includes the roughness effect of teeth contact surfaces. The mean value of the asperity summit curvature, the standard deviation of the asperity height distribution and the area density of the asperity height distribution are the three statistical parameters that describe the micron-scale surface roughness. An explicit approximation is obtained to relate the contact load and the minimum surface separation and to estimate the energy loss. Then an analytical expression is derived for the plastic energy dissipation per cycle as a function of plasticity index for gear teeth. The proposed function can be applied in the design of gears by engineers and manufacturers. Additionally, a pertinent lumped mass at the area of interaction is assumed to describe the contact frequency and damping ratio using a nonlinear dynamic model.
© 2020 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n Assessment of the potential contribution of alternative water supply systems in two contrasting locations: Lilongwe, Malawi and Sharm El-Sheikh, Egypt.\n \n \n \n \n\n\n \n Jussah, O.; Orabi, M. O. M.; Sunik, J.; Bichai, F.; and Zevenbergen, C.\n\n\n \n\n\n\n Journal of Water and Climate Change, 11(1): 130 - 149. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"AssessmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201708570050 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment of the potential contribution of alternative water supply systems in two contrasting locations: Lilongwe, Malawi and Sharm El-Sheikh, Egypt},\njournal = {Journal of Water and Climate Change},\nauthor = {Jussah, Osman and Orabi, Mohamed O. M. and Sunik, Janez and Bichai, Francoise and Zevenbergen, Chris},\nvolume = {11},\nnumber = {1},\nyear = {2020},\npages = {130 - 149},\nissn = {20402244},\nabstract = {Growing water demand poses a challenge for supply. Poor understanding of alternative sources can hamper plans for addressing water scarcity and supply resilience. The potential of three alternative supply systems in Lilongwe, Malawi and Sharm El-Sheikh, Egypt are compared using a fast, data-light assessment approach. Lilongwe water supply is based on unsustainable use of source water, while Sharm depends primarily on desalination. Both locations experience shortages due to poor system performance and service inequity. Alternative supply systems are shown to potentially contribute to supply augmentation/diversification, improving service and system resilience. There are considerable seasonal variations to consider, especially regarding storage of water. Social preferences could limit the uptake/demand for alternative water. One important conclusion is the value in addressing public perceptions of alternative systems, and assessing water end use in order to site systems appropriately. Other issues surround financing, encouraging uptake and addressing institutional/ governance aspects surrounding equitable distribution. A further consideration is whether demand reductions might yield shorter-term improvements in performance without the need to institute potentially expensive alternative water strategies. Reducing non-revenue water is a priority. Such measures should be undertaken with alternative supply enhancement to reduce inequity of supply, improve system performance and increase resilience to future changes.<br/> © IWA Publishing 2020.},\nkey = {Water supply},\n%keywords = {Desalination;Water management;Water supply systems;Digital storage;},\n%note = {Alternative source;Alternative systems;Alternative waters;Assessment approaches;Non-revenue waters;Seasonal variation;Social preference;System resiliences;},\nURL = {http://dx.doi.org/10.2166/wcc.2018.117},\n} \n\n\n
\n
\n\n\n
\n Growing water demand poses a challenge for supply. Poor understanding of alternative sources can hamper plans for addressing water scarcity and supply resilience. The potential of three alternative supply systems in Lilongwe, Malawi and Sharm El-Sheikh, Egypt are compared using a fast, data-light assessment approach. Lilongwe water supply is based on unsustainable use of source water, while Sharm depends primarily on desalination. Both locations experience shortages due to poor system performance and service inequity. Alternative supply systems are shown to potentially contribute to supply augmentation/diversification, improving service and system resilience. There are considerable seasonal variations to consider, especially regarding storage of water. Social preferences could limit the uptake/demand for alternative water. One important conclusion is the value in addressing public perceptions of alternative systems, and assessing water end use in order to site systems appropriately. Other issues surround financing, encouraging uptake and addressing institutional/ governance aspects surrounding equitable distribution. A further consideration is whether demand reductions might yield shorter-term improvements in performance without the need to institute potentially expensive alternative water strategies. Reducing non-revenue water is a priority. Such measures should be undertaken with alternative supply enhancement to reduce inequity of supply, improve system performance and increase resilience to future changes.
© IWA Publishing 2020.\n
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\n \n\n \n \n \n \n \n \n Numerical Study on the Collapse of the Morandi Bridge.\n \n \n \n \n\n\n \n Malomo, D.; Scattarreggia, N.; Orgnoni, A.; Pinho, R.; Moratti, M.; and Calvi, G. M.\n\n\n \n\n\n\n Journal of Performance of Constructed Facilities, 34(4). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201808585709 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical Study on the Collapse of the Morandi Bridge},\njournal = {Journal of Performance of Constructed Facilities},\nauthor = {Malomo, Daniele and Scattarreggia, Nicola and Orgnoni, Andrea and Pinho, Rui and Moratti, Matteo and Calvi, Gian Michele},\nvolume = {34},\nnumber = {4},\nyear = {2020},\nissn = {08873828},\nabstract = {An innovative discontinuum-based micromodeling approach, the Applied Element Method, is used in this work to investigate explicitly potential failure mechanisms that might have contributed to the collapse of the Morandi Bridge in Genoa, Italy, which occurred on August 14, 2018. While, consistently with the findings presented in a previous contribution by the same authors, the initial trigger of the collapse mechanism was assumed as the release of one of the stays, this study investigates, through a sensitivity study, the impact that several parameters and epistemic uncertainties, including reduction of cables' cross section (potentially induced by corrosion) and various possible configurations of both passive and active reinforcements in the main deck, have on the predicted failure mode. Then, to indicate the structural elements and details in which a potential presence of corrosion should be more carefully explored, the observed debris distribution is compared with its numerical counterparts.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Corrosion},\n%keywords = {Uncertainty analysis;Failure (mechanical);},\n%note = {Active reinforcement;Collapse mechanism;Element method;Epistemic uncertainties;Micro-modeling;Potential failures;Sensitivity studies;Structural elements;},\nURL = {http://dx.doi.org/10.1061/(ASCE)CF.1943-5509.0001428},\n} \n\n\n
\n
\n\n\n
\n An innovative discontinuum-based micromodeling approach, the Applied Element Method, is used in this work to investigate explicitly potential failure mechanisms that might have contributed to the collapse of the Morandi Bridge in Genoa, Italy, which occurred on August 14, 2018. While, consistently with the findings presented in a previous contribution by the same authors, the initial trigger of the collapse mechanism was assumed as the release of one of the stays, this study investigates, through a sensitivity study, the impact that several parameters and epistemic uncertainties, including reduction of cables' cross section (potentially induced by corrosion) and various possible configurations of both passive and active reinforcements in the main deck, have on the predicted failure mode. Then, to indicate the structural elements and details in which a potential presence of corrosion should be more carefully explored, the observed debris distribution is compared with its numerical counterparts.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n On mitigating rebar–concrete interface damages due to the pre-cracking phenomena using superabsorbent polymers.\n \n \n \n \n\n\n \n Mousavi, S. S.; Ouellet-Plamondon, C. M.; Guizani, L.; Bhojaraju, C.; and Brial, V.\n\n\n \n\n\n\n Construction and Building Materials, 253. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"OnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201708512993 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {On mitigating rebar–concrete interface damages due to the pre-cracking phenomena using superabsorbent polymers},\njournal = {Construction and Building Materials},\nauthor = {Mousavi, Seyed Sina and Ouellet-Plamondon, Claudiane M. and Guizani, Lotfi and Bhojaraju, Chandrasekhar and Brial, Victor},\nvolume = {253},\nyear = {2020},\nissn = {09500618},\nabstract = {This study intends to determine the effects of incorporating superabsorbent polymers (SAP) within concrete on the bond properties of steel reinforcing bars (rebar) embedded in uncracked and pre-cracked concrete. An experimental program is conducted to check the performance of SAP, as a healing agent inside the concrete, in mitigating internal damage at the rebar-concrete interface due to the pre-cracking phenomena. Two types of SAP with different particle sizes (0.15 and 0.50 mm) and chemistries are considered in the experimental program. Pull-out test results show improved bond properties of steel rebars embedded in uncracked and healed concrete containing lower dosages of SAP. However, concrete containing a high dosage of SAP shows lower bond strength, compared to normal concrete, due to the presence of macro voids. A considerable healing effect is observed for the initial bond-slip curve portion, the bond strength, and the energy absorbed by the bond mechanism, within the cracks of pre-cracked SAP-modified concrete subjected to wet-dry cycles. This study shows that SAP can significantly increase the autogenous healing performance of concrete at rebar-concrete interfacial damage sites.<br/> © 2020 Elsevier Ltd},\nkey = {Reinforced concrete},\n%keywords = {Self-healing materials;Bond strength (materials);},\n%note = {Concrete interface;Cracked concretes;Different particle sizes;Experimental program;Interfacial damages;Lower bond strength;Modified concrete;Superabsorbent polymer;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2020.119181},\n} \n\n\n
\n
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\n This study intends to determine the effects of incorporating superabsorbent polymers (SAP) within concrete on the bond properties of steel reinforcing bars (rebar) embedded in uncracked and pre-cracked concrete. An experimental program is conducted to check the performance of SAP, as a healing agent inside the concrete, in mitigating internal damage at the rebar-concrete interface due to the pre-cracking phenomena. Two types of SAP with different particle sizes (0.15 and 0.50 mm) and chemistries are considered in the experimental program. Pull-out test results show improved bond properties of steel rebars embedded in uncracked and healed concrete containing lower dosages of SAP. However, concrete containing a high dosage of SAP shows lower bond strength, compared to normal concrete, due to the presence of macro voids. A considerable healing effect is observed for the initial bond-slip curve portion, the bond strength, and the energy absorbed by the bond mechanism, within the cracks of pre-cracked SAP-modified concrete subjected to wet-dry cycles. This study shows that SAP can significantly increase the autogenous healing performance of concrete at rebar-concrete interfacial damage sites.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Experimental and numerical investigations of replaceable moment-resisting viscoelastic damper for steel frames.\n \n \n \n \n\n\n \n Shu, Z.; Ning, B.; Li, S.; Li, Z.; Gan, Z.; and Xie, Y.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 170. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201708534209 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental and numerical investigations of replaceable moment-resisting viscoelastic damper for steel frames},\njournal = {Journal of Constructional Steel Research},\nauthor = {Shu, Zhan and Ning, Bo and Li, Shuang and Li, Zheng and Gan, Zhaozhuo and Xie, Yazhou},\nvolume = {170},\nyear = {2020},\nissn = {0143974X},\nabstract = {An innovative type of replaceable moment-resisting viscoelastic damper (RMVD) was developed to increase the level of inherent damping of steel moment frame buildings to control wind-induced and/or earthquake-induced dynamic vibrations. The RMVDs are installed in lieu of existing steel moment connections, which occupies no additional architectural space. The system level damping of the steel moment frames could be increased from the viscoelastic segment of the RMVDs. Besides, the proposed damper exhibits passively adaptive performance. The energy dissipation mechanism of the RMVD could be easily shifted between the viscoelastic segment and fuse segment under different levels of inter-story drifts. The sacrificial fuse segment of the damper, which could be easily replaced after an earthquake event, provides ductile and stable performance when the inter-story drifts exceed a predefined threshold. The paper first presents a systemic investigation of the performance of viscoelastic material. Then, a series of dynamic experimental studies were carried out on the viscoelastic segment when subjected to input motions that feature different frequencies and magnitudes, providing a comprehensive overview of the damper performance. Furthermore, the numerical simulation of the damper is provided at the component level. Finally, a steel portal frame is simulated as a case study to present the structural performance with the dampers under static pushover loads. The result of the study shows that the energy dissipation capacity of steel moment frames could be improved throughout the implementation of such devices.<br/> © 2020 Elsevier Ltd},\nkey = {Earthquakes},\n%keywords = {Structural analysis;Energy dissipation;Damping;Viscoelasticity;},\n%note = {Different frequency;Energy dissipation capacities;Energy dissipation mechanism;Numerical investigations;Steel moment connection;Structural performance;Visco-elastic dampers;Visco-elastic material;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2020.106100},\n} \n\n\n
\n
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\n An innovative type of replaceable moment-resisting viscoelastic damper (RMVD) was developed to increase the level of inherent damping of steel moment frame buildings to control wind-induced and/or earthquake-induced dynamic vibrations. The RMVDs are installed in lieu of existing steel moment connections, which occupies no additional architectural space. The system level damping of the steel moment frames could be increased from the viscoelastic segment of the RMVDs. Besides, the proposed damper exhibits passively adaptive performance. The energy dissipation mechanism of the RMVD could be easily shifted between the viscoelastic segment and fuse segment under different levels of inter-story drifts. The sacrificial fuse segment of the damper, which could be easily replaced after an earthquake event, provides ductile and stable performance when the inter-story drifts exceed a predefined threshold. The paper first presents a systemic investigation of the performance of viscoelastic material. Then, a series of dynamic experimental studies were carried out on the viscoelastic segment when subjected to input motions that feature different frequencies and magnitudes, providing a comprehensive overview of the damper performance. Furthermore, the numerical simulation of the damper is provided at the component level. Finally, a steel portal frame is simulated as a case study to present the structural performance with the dampers under static pushover loads. The result of the study shows that the energy dissipation capacity of steel moment frames could be improved throughout the implementation of such devices.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Three-dimensional constitutive model for cyclic behavior of soil-structure interfaces.\n \n \n \n \n\n\n \n Saberi, M.; Annan, C.; and Konrad, J.\n\n\n \n\n\n\n Soil Dynamics and Earthquake Engineering, 134. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"Three-dimensionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201608431169 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Three-dimensional constitutive model for cyclic behavior of soil-structure interfaces},\njournal = {Soil Dynamics and Earthquake Engineering},\nauthor = {Saberi, Miad and Annan, Charles-Darwin and Konrad, Jean-Marie},\nvolume = {134},\nyear = {2020},\nissn = {02677261},\nabstract = {Many soil-structure interaction systems experience a three-dimensional loading condition (i.e. shear coupling) at their interfaces. In this study, an elasto-plastic constitutive formulation for interfaces in soil-structure interaction problems is proposed considering the effects of 3D shear coupling loading conditions. The proposed model is capable of simulating granular soil-structure interfaces for both monotonic and cyclic loading over a wide range of normal stress and normal stiffness using a single set of eleven calibration parameters. The model is capable of simulating a number of complex interface behaviour, including hardening and softening, compaction, dilation and phase transformation, stress path dependency, accumulative contraction and stabilization, stress degradation and particle breakage under monotonic and cyclic loading. The constitutive model performance is examined using available experimental data for gravelly and sandy soil-structure interfaces subjected to monotonic and cyclic loads involving shear coupling.<br/> © 2020 Elsevier Ltd},\nkey = {Constitutive models},\n%keywords = {Shear flow;Cyclic loads;Soils;Stress analysis;Soil structure interactions;},\n%note = {Calibration parameters;Constitutive formulation;Monotonic and cyclic loading;Particle breakage;Soil structure interface;Stress degradation;Stress path dependency;Three-dimensional loadings;},\nURL = {http://dx.doi.org/10.1016/j.soildyn.2020.106162},\n} \n\n\n
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\n Many soil-structure interaction systems experience a three-dimensional loading condition (i.e. shear coupling) at their interfaces. In this study, an elasto-plastic constitutive formulation for interfaces in soil-structure interaction problems is proposed considering the effects of 3D shear coupling loading conditions. The proposed model is capable of simulating granular soil-structure interfaces for both monotonic and cyclic loading over a wide range of normal stress and normal stiffness using a single set of eleven calibration parameters. The model is capable of simulating a number of complex interface behaviour, including hardening and softening, compaction, dilation and phase transformation, stress path dependency, accumulative contraction and stabilization, stress degradation and particle breakage under monotonic and cyclic loading. The constitutive model performance is examined using available experimental data for gravelly and sandy soil-structure interfaces subjected to monotonic and cyclic loads involving shear coupling.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n An analytical model for rapid estimation of hurricane supergradient winds.\n \n \n \n \n\n\n \n Snaiki, R.; and Wu, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 201. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20201608434561 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An analytical model for rapid estimation of hurricane supergradient winds},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Snaiki, Reda and Wu, Teng},\nvolume = {201},\nyear = {2020},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">The supergradient winds that may have severe implications on the wind design of high-rise buildings have been commonly observed in the hurricane boundary layer. However, the widely-used log-law or power-law wind profile excludes the supergradient-wind region in which the tangential winds are larger than the gradient winds. Although high-fidelity, nonlinear hurricane wind models may well capture the supergradient winds, high computational demand is needed for each simulation. Recently developed linear, height-resolving hurricane wind models, while can efficiently consider the existence of supergradient winds, significantly underestimate them due essentially to the ignorance of vertical advection term in the governing equations. A number of studies have actually demonstrated that the vertical advection is a major contributor to the transfer of horizontal momentum to the supergradient region. To this end, a refined analytical model that simultaneously integrates the horizontal advection, vertical advection and vertical diffusion terms into the governing equations is developed for accurately and efficiently estimating the hurricane supergradient winds. The important role of the vertical wind speed in determining the horizontal wind speeds (including supergradient winds) in the hurricane boundary layer is highlighted. Since the horizontal and vertical wind components are mutually dependent, the iteration technique is utilized to solve the proposed analytical model. The consideration of the vertical advection results in intensified supergradient winds that are consistent with the observations. Furthermore, a strong outflow region in the vicinity of the radius of maximum winds due to the supergradient winds can be obtained. Due to its simplicity and computational efficiency, the developed analytical model can be easily implemented in the Monte Carlo simulations for the rapid assessment of hurricane wind risk to coastal structures, especially to high-rise buildings.<br/></div> © 2020 Elsevier Ltd},\nkey = {Boundary layers},\n%keywords = {Hurricanes;Analytical models;Intelligent systems;Iterative methods;Risk assessment;Tall buildings;Computational efficiency;Monte Carlo methods;Wind effects;Advection;},\n%note = {Computational demands;Governing equations;High rise building;Horizontal advection;Hurricane boundary layers;Hurricane wind models;Iteration techniques;Vertical diffusion;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2020.104175},\n} \n\n\n
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The supergradient winds that may have severe implications on the wind design of high-rise buildings have been commonly observed in the hurricane boundary layer. However, the widely-used log-law or power-law wind profile excludes the supergradient-wind region in which the tangential winds are larger than the gradient winds. Although high-fidelity, nonlinear hurricane wind models may well capture the supergradient winds, high computational demand is needed for each simulation. Recently developed linear, height-resolving hurricane wind models, while can efficiently consider the existence of supergradient winds, significantly underestimate them due essentially to the ignorance of vertical advection term in the governing equations. A number of studies have actually demonstrated that the vertical advection is a major contributor to the transfer of horizontal momentum to the supergradient region. To this end, a refined analytical model that simultaneously integrates the horizontal advection, vertical advection and vertical diffusion terms into the governing equations is developed for accurately and efficiently estimating the hurricane supergradient winds. The important role of the vertical wind speed in determining the horizontal wind speeds (including supergradient winds) in the hurricane boundary layer is highlighted. Since the horizontal and vertical wind components are mutually dependent, the iteration technique is utilized to solve the proposed analytical model. The consideration of the vertical advection results in intensified supergradient winds that are consistent with the observations. Furthermore, a strong outflow region in the vicinity of the radius of maximum winds due to the supergradient winds can be obtained. Due to its simplicity and computational efficiency, the developed analytical model can be easily implemented in the Monte Carlo simulations for the rapid assessment of hurricane wind risk to coastal structures, especially to high-rise buildings.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Seismic Floor Acceleration Amplification Based on Instrumented Building Records.\n \n \n \n \n\n\n \n Abo El Ezz, A.; Assi, R.; and Zand Miralvand, T.\n\n\n \n\n\n\n Journal of Architectural Engineering, 26(2). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201408376483 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Floor Acceleration Amplification Based on Instrumented Building Records},\njournal = {Journal of Architectural Engineering},\nauthor = {Abo El Ezz, Ahmad and Assi, Rola and Zand Miralvand, Tania},\nvolume = {26},\nnumber = {2},\nyear = {2020},\nissn = {10760431},\nabstract = {The estimation of seismic forces for acceleration-sensitive nonstructural components (NSCs) in buildings including architectural, mechanical, and electrical systems and building content requires a reliable prediction of the seismic floor accelerations along the building height. These accelerations can be estimated either by performing detailed time-history dynamic analyses on a finite-element model of the supporting building or by using simplified equations as proposed in the North American and European codes. In addition, a probabilistic estimate of floor acceleration demands is essential for risk-informed performance assessment and loss estimation of these NSCs. To this end, an analytical method for the prediction of peak floor acceleration demands was proposed in FEMA-P58 [ATC (Applied Technology Council). 2012. Seismic performance assessment of buildings, prepared for federal emergency management agency. FEMA-P58. Washington, DC: ATC] based on linear and nonlinear time-history analyses performed on idealized low-To-medium-rise building models. This paper presents a validation study of the FEMA-P58 equation using two databases of recorded horizontal rooftop accelerations in 41 instrumented buildings. The first database consists of 28 buildings that were subjected to different earthquake events in California, while the second database consists of 13 buildings that were subjected to the 2011 Tohoku earthquake in Japan. The ratios of the recorded rooftop-To-ground-level accelerations in both databases were computed and compared to the FEMA-P58 predictive equation. A comparison of predicted versus recorded median and dispersion of the rooftop acceleration amplification was made and discussed. The results showed that the equation underestimated the acceleration amplification for frame buildings.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Acceleration},\n%keywords = {Floors;Database systems;Buildings;Earthquakes;Seismic response;Risk assessment;Risk perception;Risk management;},\n%note = {Federal Emergency Management Agency;Floor accelerations;Instrumented buildings;Non-structural components;Nonlinear time history analysis;Performance-based assessment;Seismic performance assessment;Time-history dynamic analysis;},\nURL = {http://dx.doi.org/10.1061/(ASCE)AE.1943-5568.0000412},\n} \n\n\n
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\n The estimation of seismic forces for acceleration-sensitive nonstructural components (NSCs) in buildings including architectural, mechanical, and electrical systems and building content requires a reliable prediction of the seismic floor accelerations along the building height. These accelerations can be estimated either by performing detailed time-history dynamic analyses on a finite-element model of the supporting building or by using simplified equations as proposed in the North American and European codes. In addition, a probabilistic estimate of floor acceleration demands is essential for risk-informed performance assessment and loss estimation of these NSCs. To this end, an analytical method for the prediction of peak floor acceleration demands was proposed in FEMA-P58 [ATC (Applied Technology Council). 2012. Seismic performance assessment of buildings, prepared for federal emergency management agency. FEMA-P58. Washington, DC: ATC] based on linear and nonlinear time-history analyses performed on idealized low-To-medium-rise building models. This paper presents a validation study of the FEMA-P58 equation using two databases of recorded horizontal rooftop accelerations in 41 instrumented buildings. The first database consists of 28 buildings that were subjected to different earthquake events in California, while the second database consists of 13 buildings that were subjected to the 2011 Tohoku earthquake in Japan. The ratios of the recorded rooftop-To-ground-level accelerations in both databases were computed and compared to the FEMA-P58 predictive equation. A comparison of predicted versus recorded median and dispersion of the rooftop acceleration amplification was made and discussed. The results showed that the equation underestimated the acceleration amplification for frame buildings.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Response of Variable-Depth Reinforced Concrete Pier Cap Beams.\n \n \n \n \n\n\n \n Orcutt, C.; Cook, W. D.; and Mitchell, D.\n\n\n \n\n\n\n Journal of Bridge Engineering, 25(6). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ResponsePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20201408376479 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Response of Variable-Depth Reinforced Concrete Pier Cap Beams},\njournal = {Journal of Bridge Engineering},\nauthor = {Orcutt, Christopher and Cook, William D. and Mitchell, Denis},\nvolume = {25},\nnumber = {6},\nyear = {2020},\nissn = {10840702},\nabstract = {Four variable-depth pier cap beams were constructed and tested. These specimens were designed to have reinforcement details that had similar features to two different types of pier cap beams used in the Champlain Bridge in Montréal, Canada. The objectives were to examine the behavior of variable-depth cap beams at service loading and at failure to analyze the effectiveness of crack control reinforcement and inclined reinforcement, as well as to investigate the influence of added external horizontal post-tensioning. The observed cap beam responses were compared with two prediction models: sectional analyses and nonlinear finite-element analyses. The amount of crack control reinforcement was important in controlling crack widths at the service load level. The inclined shear reinforcement was found to be effective in resisting shear. Horizontal post-tensioning was effective in reducing crack widths and increasing the overall stiffness of the cap beams but did not lead to significant increases in shear strength. Failure shears predicted by the sectional analyses were conservative. Nonlinear finite element analyses gave good predictions of the complete behavior and strength of the cap beams.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Horizontal wells},\n%keywords = {Concrete beams and girders;Piers;Finite element method;Reinforced concrete;},\n%note = {Controlling crack;Non-linear finite-element analysis;Overall stiffness;Prediction model;Reinforced concrete pier;Sectional analysis;Service loading;Shear reinforcement;},\nURL = {http://dx.doi.org/10.1061/(ASCE)BE.1943-5592.0001548},\n} \n\n\n
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\n Four variable-depth pier cap beams were constructed and tested. These specimens were designed to have reinforcement details that had similar features to two different types of pier cap beams used in the Champlain Bridge in Montréal, Canada. The objectives were to examine the behavior of variable-depth cap beams at service loading and at failure to analyze the effectiveness of crack control reinforcement and inclined reinforcement, as well as to investigate the influence of added external horizontal post-tensioning. The observed cap beam responses were compared with two prediction models: sectional analyses and nonlinear finite-element analyses. The amount of crack control reinforcement was important in controlling crack widths at the service load level. The inclined shear reinforcement was found to be effective in resisting shear. Horizontal post-tensioning was effective in reducing crack widths and increasing the overall stiffness of the cap beams but did not lead to significant increases in shear strength. Failure shears predicted by the sectional analyses were conservative. Nonlinear finite element analyses gave good predictions of the complete behavior and strength of the cap beams.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Improving the estimation of water level over freshwater ice cover using altimetry satellite active and passive observations.\n \n \n \n \n\n\n \n Ziyad, J.; Goita, K.; Magagi, R.; Blarel, F.; and Frappart, F.\n\n\n \n\n\n\n Remote Sensing, 12(6). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ImprovingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201308357687 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Improving the estimation of water level over freshwater ice cover using altimetry satellite active and passive observations},\njournal = {Remote Sensing},\nauthor = {Ziyad, Jawad and Goita, Kalifa and Magagi, Ramata and Blarel, Fabien and Frappart, Frederic},\nvolume = {12},\nnumber = {6},\nyear = {2020},\nissn = {20724292},\nabstract = {Owing to its temporal resolution of 10-day and its polar orbit allowing several crossings over large lakes, the US National Aeronautics and Space Administration (NASA) and the French Centre National d'Etudes Spatiales (CNES) missions including Topex/Poseidon, Jason-1/2/3 demonstrated strong capabilities for the continuous and long-term monitoring (starting in 1992) of large and medium-sized water bodies. However, the presence of heterogeneous targets in the altimeter footprint, such as ice cover in boreal areas, remains a major issue to obtain estimates of water level over subarctic lakes of similar accuracy as over other inland water bodies using satellite altimetry (i.e., R ≥ 0.9 and RMSE ≤ 10 to 20 cm when compared to in-situ water stages). In this study, we aim to automatically identify the Jason-2 altimetry measurements corresponding to open water, ice and transition (water-ice) to improve the estimations of water level during freeze and thaw periods using only the point measurements of open water. Four Canadian lakes were selected to analyze active (waveform parameters) and passive (brightness temperature) microwave data acquired by the Jason-2 radar altimetry mission: Great Slave Lake, Lake Athabasca, Lake Winnipeg, and Lake of the Woods. To determine lake surface states, backscattering coefficient and peakiness at Ku-band derived from the radar altimeter waveform and brightness temperature at 18.7 and 37 GHz measured by the microwave radiometer contained in the geophysical data records (GDR) of Jason-2 were used in two different unsupervised classification techniques to define the thresholds of discrimination between open water and ice measurements. K-means technique provided better results than hierarchical clustering based upon silhouette criteria and the Calinski-Harabz index. Thresholds of discrimination between ice and water were validated with the Normalized Difference Snow Index (NDSI) snow cover products of the MODIS satellite. The use of open water threshold resulted in improved water level estimation compared to in situ water stages, especially in the presence of ice. For the four lakes, the Pearson coefficient (r) increased on average from about 0.8 without the use of the thresholds to more than 0.90. The unbiased RMSE were generally lower than 20 cm when the threshold of open water was used and more than 22 cm over smaller lakes, without using the thresholds.<br/> © 2020 by the authors. Licensee MDPI, Basel, Switzerland.},\nkey = {Lakes},\n%keywords = {Temperature;Backscattering;Radiometers;Snow;NASA;Water levels;Space-based radar;Ice;Meteorological instruments;Orbits;Luminance;Radar measurement;},\n%note = {Brightness temperatures;Clustering;Ice cover;Inland waters;Jason-2;Peakiness;Radar altimetry;},\nURL = {http://dx.doi.org/10.3390/rs12060967},\n} \n\n\n
\n
\n\n\n
\n Owing to its temporal resolution of 10-day and its polar orbit allowing several crossings over large lakes, the US National Aeronautics and Space Administration (NASA) and the French Centre National d'Etudes Spatiales (CNES) missions including Topex/Poseidon, Jason-1/2/3 demonstrated strong capabilities for the continuous and long-term monitoring (starting in 1992) of large and medium-sized water bodies. However, the presence of heterogeneous targets in the altimeter footprint, such as ice cover in boreal areas, remains a major issue to obtain estimates of water level over subarctic lakes of similar accuracy as over other inland water bodies using satellite altimetry (i.e., R ≥ 0.9 and RMSE ≤ 10 to 20 cm when compared to in-situ water stages). In this study, we aim to automatically identify the Jason-2 altimetry measurements corresponding to open water, ice and transition (water-ice) to improve the estimations of water level during freeze and thaw periods using only the point measurements of open water. Four Canadian lakes were selected to analyze active (waveform parameters) and passive (brightness temperature) microwave data acquired by the Jason-2 radar altimetry mission: Great Slave Lake, Lake Athabasca, Lake Winnipeg, and Lake of the Woods. To determine lake surface states, backscattering coefficient and peakiness at Ku-band derived from the radar altimeter waveform and brightness temperature at 18.7 and 37 GHz measured by the microwave radiometer contained in the geophysical data records (GDR) of Jason-2 were used in two different unsupervised classification techniques to define the thresholds of discrimination between open water and ice measurements. K-means technique provided better results than hierarchical clustering based upon silhouette criteria and the Calinski-Harabz index. Thresholds of discrimination between ice and water were validated with the Normalized Difference Snow Index (NDSI) snow cover products of the MODIS satellite. The use of open water threshold resulted in improved water level estimation compared to in situ water stages, especially in the presence of ice. For the four lakes, the Pearson coefficient (r) increased on average from about 0.8 without the use of the thresholds to more than 0.90. The unbiased RMSE were generally lower than 20 cm when the threshold of open water was used and more than 22 cm over smaller lakes, without using the thresholds.
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.\n
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\n \n\n \n \n \n \n \n \n Erratum to: Analysing the contribution of snow water equivalent to the terrestrial water storage over Canada (Hydrological Processes, (2020), 34, 2, (175-188), 10.1002/hyp.13625).\n \n \n \n \n\n\n \n Bahrami, A.; Goita, K.; and Magagi, R.\n\n\n \n\n\n\n Hydrological Processes, 34(8): 2007 - 2008. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ErratumPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201108300215 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Erratum to: Analysing the contribution of snow water equivalent to the terrestrial water storage over Canada (Hydrological Processes, (2020), 34, 2, (175-188), 10.1002/hyp.13625)},\njournal = {Hydrological Processes},\nauthor = {Bahrami, Ala and Goita, Kalifa and Magagi, Ramata},\nvolume = {34},\nnumber = {8},\nyear = {2020},\npages = {2007 - 2008},\nissn = {08856087},\nabstract = {An error has been identified in Tables 2 and 3 of the article "Analysing the contribution of snow water equivalent to the terrestrial water storage over Canada" (DOI: 10.1002/hyp.13625) (Bahrami A, Goïta K, Magagi R. (2020)), published in Wiley Online Library on 5 December 2019 in Hydrological Processes, 34:175–188 In Table, the bold values were incorrectly described as being the highest values. In fact, they were the insignificant R<inf>s</inf> results. In the corrected table below, the insignificant values are now identified with an asterisk. The highest values are not indicated. In Table, a %note to the table that described bold values and gray shading was incorrectly included. In the correct version of the table below it has been deleted. The corrected tables are as follows. 2 Basin averaged statistical results between GRACE derived TWSA and SWEA and GlobSnow2/AMSR-E/CMC SWEA for fifteen basins from December 2002 to March 2011 (Table presented.) Note: Values with an asterisk show insignificant R<inf>s</inf> results. Abbreviations: AMSR-E, Advanced Microwave Scanning Radiometer-Earth Observing System; CMC, Canadian Meteorological Centre; GlobSnow2, Global Snow Monitoring for Climate Research; GRACE, Gravity Recovery and Climate Experiment; SWEA, snow water equivalent anomaly; TWSA, terrestrial water storage anomaly. 3 Basin averaged RMSE results between GRACE derived TWSA and SWEA and GlobSnow2/AMSR-E/CMC SWEA for fifteen basins from December 2002 to March 2011 (Table presented.) Abbreviations: AMSR-E, Advanced Microwave Scanning Radiometer-Earth Observing System; CMC, Canadian Meteorological Centre; GlobSnow2, Global Snow Monitoring for Climate Research; GRACE, Gravity Recovery and Climate Experiment; SWEA, snow water equivalent anomaly; TWSA, terrestrial water storage anomaly.<br/> © 2020 John Wiley & Sons Ltd},\nURL = {http://dx.doi.org/10.1002/hyp.13725},\n} \n\n\n
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\n An error has been identified in Tables 2 and 3 of the article \"Analysing the contribution of snow water equivalent to the terrestrial water storage over Canada\" (DOI: 10.1002/hyp.13625) (Bahrami A, Goïta K, Magagi R. (2020)), published in Wiley Online Library on 5 December 2019 in Hydrological Processes, 34:175–188 In Table, the bold values were incorrectly described as being the highest values. In fact, they were the insignificant Rs results. In the corrected table below, the insignificant values are now identified with an asterisk. The highest values are not indicated. In Table, a %note to the table that described bold values and gray shading was incorrectly included. In the correct version of the table below it has been deleted. The corrected tables are as follows. 2 Basin averaged statistical results between GRACE derived TWSA and SWEA and GlobSnow2/AMSR-E/CMC SWEA for fifteen basins from December 2002 to March 2011 (Table presented.) Note: Values with an asterisk show insignificant Rs results. Abbreviations: AMSR-E, Advanced Microwave Scanning Radiometer-Earth Observing System; CMC, Canadian Meteorological Centre; GlobSnow2, Global Snow Monitoring for Climate Research; GRACE, Gravity Recovery and Climate Experiment; SWEA, snow water equivalent anomaly; TWSA, terrestrial water storage anomaly. 3 Basin averaged RMSE results between GRACE derived TWSA and SWEA and GlobSnow2/AMSR-E/CMC SWEA for fifteen basins from December 2002 to March 2011 (Table presented.) Abbreviations: AMSR-E, Advanced Microwave Scanning Radiometer-Earth Observing System; CMC, Canadian Meteorological Centre; GlobSnow2, Global Snow Monitoring for Climate Research; GRACE, Gravity Recovery and Climate Experiment; SWEA, snow water equivalent anomaly; TWSA, terrestrial water storage anomaly.
© 2020 John Wiley & Sons Ltd\n
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\n \n\n \n \n \n \n \n \n Simulating the shake table response of unreinforced masonry cavity wall structures tested to collapse or near-collapse conditions.\n \n \n \n \n\n\n \n Malomo, D.; Pinho, R.; and Penna, A.\n\n\n \n\n\n\n Earthquake Spectra, 36(2): 554 - 578. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"SimulatingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20201208316940 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Simulating the shake table response of unreinforced masonry cavity wall structures tested to collapse or near-collapse conditions},\njournal = {Earthquake Spectra},\nauthor = {Malomo, Daniele and Pinho, Rui and Penna, Andrea},\nvolume = {36},\nnumber = {2},\nyear = {2020},\npages = {554 - 578},\nissn = {87552930},\nabstract = {<div data-language="eng" data-ev-field="abstract">The seismic performance of existing unreinforced masonry (URM) buildings is considerably affected by typology and level of effectiveness of both construction details and structural components, especially if not originally designed for resisting earthquakes. Within this framework, the use of advanced numerical approaches that are capable of duly accounting for such aspects might improve significantly the assessment of the global response of URM structures. In this article, the applied element method is thus employed for simulating the shake table response of a number of full-scale building specimens representative of cavity wall terraced house construction, used in a number of countries exposed to tectonic or induced seismicity, accounting explicitly for the influence of the presence of both rigid and flexible diaphragms, degree of connections among structural members, and interaction between in- and out-of-plane mechanisms. Although the models slightly underestimated the energy dissipation in some specific cycles prior to collapse, the predicted crack patterns, failure modes, and hysteretic behaviors have shown a good agreement with their experimental counterparts.<br/></div> © The Author(s) 2020.},\nkey = {Numerical methods},\n%keywords = {Walls (structural partitions);Energy dissipation;Masonry materials;Hysteresis;Earthquakes;},\n%note = {Collapse conditions;Degree of connection;Flexible diaphragms;Hysteretic behavior;Numerical approaches;Seismic Performance;Structural component;Unreinforced masonry;},\nURL = {http://dx.doi.org/10.1177/8755293019891715},\n} \n\n\n
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The seismic performance of existing unreinforced masonry (URM) buildings is considerably affected by typology and level of effectiveness of both construction details and structural components, especially if not originally designed for resisting earthquakes. Within this framework, the use of advanced numerical approaches that are capable of duly accounting for such aspects might improve significantly the assessment of the global response of URM structures. In this article, the applied element method is thus employed for simulating the shake table response of a number of full-scale building specimens representative of cavity wall terraced house construction, used in a number of countries exposed to tectonic or induced seismicity, accounting explicitly for the influence of the presence of both rigid and flexible diaphragms, degree of connections among structural members, and interaction between in- and out-of-plane mechanisms. Although the models slightly underestimated the energy dissipation in some specific cycles prior to collapse, the predicted crack patterns, failure modes, and hysteretic behaviors have shown a good agreement with their experimental counterparts.
© The Author(s) 2020.\n
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\n \n\n \n \n \n \n \n \n Design strategies using multi-criteria decision-making tools to enhance the performance of building façades.\n \n \n \n \n\n\n \n Moghtadernejad, S.; Chouinard, L. E.; and Mirza, M. S.\n\n\n \n\n\n\n Journal of Building Engineering, 30. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"DesignPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20201108279839 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design strategies using multi-criteria decision-making tools to enhance the performance of building façades},\njournal = {Journal of Building Engineering},\nauthor = {Moghtadernejad, Saviz and Chouinard, Luc E. and Mirza, M. Saeed},\nvolume = {30},\nyear = {2020},\nissn = {23527102},\nabstract = {The climate change crisis and the need to control environmental impacts of the construction industry have motivated designers toward designing high performance and sustainable buildings. A building's façade, as a part of the enclosure, is certainly no exception to this requirement; however, despite the significant potential for building energy savings and reduction of environmental impacts, building façade design is not receiving proper attention. Presently, there is a need for a systematic approach to facilitate the integration of the various disciplines involved (e.g. architecture, as well as structural, mechanical and electrical design) and provide a comprehensive action plan that considers the life cycle stages of a façade system from conceptual design to demolition. This paper initially provides the required actions and considerations in each phase of design to provide a new and simplified guideline for designers in achieving a high performance façade system, with the help of Multi-Criteria Decision-Making (MCDM) methods. Secondly, the application of the Choquet integral and the Analytic Hierarchy Process (AHP) is discussed to select the most suitable alternatives in façade preliminary design for a case study building, and the results are compared.<br/> © 2020 Elsevier Ltd},\nkey = {Decision making},\n%keywords = {Architectural design;Life cycle;Integral equations;Ecodesign;Conceptual design;Construction industry;Climate change;Environmental impact;Intelligent buildings;Energy conservation;Sustainable development;},\n%note = {Analytic hierarchy process (ahp);Building energy saving;Design strategies;Mechanical and electrical;Multi-criteria decision making;Performance of buildings;Preliminary design;Sustainable building;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2020.101274},\n} \n\n\n
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\n The climate change crisis and the need to control environmental impacts of the construction industry have motivated designers toward designing high performance and sustainable buildings. A building's façade, as a part of the enclosure, is certainly no exception to this requirement; however, despite the significant potential for building energy savings and reduction of environmental impacts, building façade design is not receiving proper attention. Presently, there is a need for a systematic approach to facilitate the integration of the various disciplines involved (e.g. architecture, as well as structural, mechanical and electrical design) and provide a comprehensive action plan that considers the life cycle stages of a façade system from conceptual design to demolition. This paper initially provides the required actions and considerations in each phase of design to provide a new and simplified guideline for designers in achieving a high performance façade system, with the help of Multi-Criteria Decision-Making (MCDM) methods. Secondly, the application of the Choquet integral and the Analytic Hierarchy Process (AHP) is discussed to select the most suitable alternatives in façade preliminary design for a case study building, and the results are compared.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Design of stainless steel cross-sections for simple load cases with the O.I.C.\n \n \n \n \n\n\n \n Gagne, A.; Gerard, L.; and Boissonnade, N.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 168. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"DesignPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20200908234909 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design of stainless steel cross-sections for simple load cases with the O.I.C.},\njournal = {Journal of Constructional Steel Research},\nauthor = {Gagne, Anne-Sophie and Gerard, Lucile and Boissonnade, Nicolas},\nvolume = {168},\nyear = {2020},\nissn = {0143974X},\nabstract = {The present paper investigates the resistance of stainless steel I or H sections as influenced by yield extent and local stability issues. In particular, the influence of a rounded stress-strain law with large strain hardening effects on the buckling response of sections is studied. Extensive shell non-linear numerical parametric studies led to a 750+ dataset that considered various material grades, 50 different section shapes (from compact to slender) and either sections in compression or under major-axis bending. These results allow to assess the merits of a design proposal based on the Overall Interaction Concept (O.I.C.) that is shown to be both very effective and accurate while remaining simple. The various influences of section's slenderness, section shape and steel grade are studied, and comparisons with alternative design proposal and design specifications evidence an increased level of accuracy, consistency and safety.<br/> © 2020 Elsevier Ltd},\nkey = {Strain hardening},\n%keywords = {Buckling;Stainless steel;},\n%note = {Alternative designs;Buckling response;Design specification;Interaction concepts;Local buckling;Numerical parametric studies;Steel cross sections;Stress-strain law;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2020.105936},\n} \n\n\n
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\n The present paper investigates the resistance of stainless steel I or H sections as influenced by yield extent and local stability issues. In particular, the influence of a rounded stress-strain law with large strain hardening effects on the buckling response of sections is studied. Extensive shell non-linear numerical parametric studies led to a 750+ dataset that considered various material grades, 50 different section shapes (from compact to slender) and either sections in compression or under major-axis bending. These results allow to assess the merits of a design proposal based on the Overall Interaction Concept (O.I.C.) that is shown to be both very effective and accurate while remaining simple. The various influences of section's slenderness, section shape and steel grade are studied, and comparisons with alternative design proposal and design specifications evidence an increased level of accuracy, consistency and safety.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Influence of pre-wetting, non-shrink grout, and scaling on the compressive strength of grouted concrete masonry prisms.\n \n \n \n \n\n\n \n AbdelRahman, B.; and Galal, K.\n\n\n \n\n\n\n Construction and Building Materials, 241. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"InfluencePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20200808188356 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Influence of pre-wetting, non-shrink grout, and scaling on the compressive strength of grouted concrete masonry prisms},\njournal = {Construction and Building Materials},\nauthor = {AbdelRahman, Belal and Galal, Khaled},\nvolume = {241},\nyear = {2020},\nissn = {09500618},\nabstract = {This study experimentally investigates the influence of pre-wetting of dry masonry prisms, non-shrink grout, and grout strength on the axial compressive stress-strain response of grouted masonry prisms built using half-scale and full-scale concrete masonry blocks. To achieve the aims of this study, a total of forty-two concrete-masonry prisms were built and tested under concentric axial load. The results showed that grouting of dry masonry prisms rendered a non-proportional increase in the prism compressive strength, whereas grouting of wet masonry prisms exhibited a significant increase in the masonry prism compressive strength. Masonry prisms constructed with non-shrink grout showed, on average, an increase in the compressive strength when compared to masonry prisms constructed with regular grout. Wetting of masonry prisms before grouting was found to enhance the compressive strength of masonry prisms. Half-scale masonry prisms showed a comparable modulus of elasticity and strain at peak strength to their full-scale counterparts. However, some discrepancies in the compressive strength and post-peak behaviour were observed. Superposition of the masonry shell and the grout core strengths was found to highly overestimate dry grouted masonry prism compressive strength, whereas wet masonry prisms demonstrated excellent agreement with superposition values. Wetting of dry masonry prisms is a promising construction procedure that significantly enhanced the compressive strength of grouted masonry; however, further research is needed to determine the proper wetting scheme and to ensure consistent results that can be quantified.<br/> © 2019 Elsevier Ltd},\nkey = {Shrinkage},\n%keywords = {High performance concrete;Compressive strength;Wetting;Concrete construction;Grouting;Prisms;Mortar;},\n%note = {High strength concretes;Masonry Blocks;Non-shrink grouts;Scaling;Stress-strain response;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2019.117985},\n} \n\n\n
\n
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\n This study experimentally investigates the influence of pre-wetting of dry masonry prisms, non-shrink grout, and grout strength on the axial compressive stress-strain response of grouted masonry prisms built using half-scale and full-scale concrete masonry blocks. To achieve the aims of this study, a total of forty-two concrete-masonry prisms were built and tested under concentric axial load. The results showed that grouting of dry masonry prisms rendered a non-proportional increase in the prism compressive strength, whereas grouting of wet masonry prisms exhibited a significant increase in the masonry prism compressive strength. Masonry prisms constructed with non-shrink grout showed, on average, an increase in the compressive strength when compared to masonry prisms constructed with regular grout. Wetting of masonry prisms before grouting was found to enhance the compressive strength of masonry prisms. Half-scale masonry prisms showed a comparable modulus of elasticity and strain at peak strength to their full-scale counterparts. However, some discrepancies in the compressive strength and post-peak behaviour were observed. Superposition of the masonry shell and the grout core strengths was found to highly overestimate dry grouted masonry prism compressive strength, whereas wet masonry prisms demonstrated excellent agreement with superposition values. Wetting of dry masonry prisms is a promising construction procedure that significantly enhanced the compressive strength of grouted masonry; however, further research is needed to determine the proper wetting scheme and to ensure consistent results that can be quantified.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Flexural Behavior of Basalt Fiber-Reinforced Concrete Slab Strips with BFRP Bars: Experimental Testing and Numerical Simulation.\n \n \n \n \n\n\n \n Attia, K.; El Refai, A.; and Alnahhal, W.\n\n\n \n\n\n\n Journal of Composites for Construction, 24(2). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"FlexuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20200808199859 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Flexural Behavior of Basalt Fiber-Reinforced Concrete Slab Strips with BFRP Bars: Experimental Testing and Numerical Simulation},\njournal = {Journal of Composites for Construction},\nauthor = {Attia, Karim and El Refai, Ahmed and Alnahhal, Wael},\nvolume = {24},\nnumber = {2},\nyear = {2020},\nissn = {10900268},\nabstract = {This study investigated the flexural behavior of a new one-way concrete slab system reinforced longitudinally with basalt fiber-reinforced polymer (BFRP) bars and cast with basalt fiber-reinforced concrete (BFRC). The study included experimental testing and three-dimensional finite-element (FE) modeling of eight slab strips, 500×175×2,500 mm each. The investigated parameters included the volume fraction of the basalt fibers added to the concrete mix (0%, 0.5%, 1%, and 2%) and the BFRP reinforcement ratios (1.4 and 2.8 times the balanced reinforcement ratio). The effect of varying the fiber volume fraction on the mechanical properties of concrete was first assessed. The test results showed that increasing the fiber volume fraction increased the compressive strength and the modulus of rupture of the concrete. Slab strips with higher dosages of fibers showed an increased number of cracks and a considerable enhancement in their cracking and ultimate capacity. A volume fraction of 0.5% of basalt fibers had an insignificant effect on the flexural performance of the specimens, and therefore 1% of basalt fibers were recommended as a minimum dosage. Increasing the fiber volume fraction led to a noticeable increase in the ductility of the slab strips at all stages of loading. The FE models provided reasonable prediction of the nonlinear structural behavior of the slab strips. The Variable Engagement Model, initially developed for steel fiber-reinforced concrete, was assessed to describe the BFRC mixes. Good correlation between the numerical and experimental results in terms of cracking loads, load-carrying capacities, deflections, and crack pattern was obtained.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Concrete mixtures},\n%keywords = {Basalt;Fiber reinforced materials;Volume fraction;Compressive strength;Concrete slabs;Corrosion;Cracks;Finite element method;Reinforced plastics;Reinforced concrete;Concrete testing;Steel fibers;},\n%note = {Basalt fiber;Basalt fiber reinforced concretes;Fiber volume fractions;Flexure;Nonlinear structural behavior;Properties of concretes;Three dimensional finite elements;Variable engagement models;},\nURL = {http://dx.doi.org/10.1061/(ASCE)CC.1943-5614.0001002},\n} \n\n\n
\n
\n\n\n
\n This study investigated the flexural behavior of a new one-way concrete slab system reinforced longitudinally with basalt fiber-reinforced polymer (BFRP) bars and cast with basalt fiber-reinforced concrete (BFRC). The study included experimental testing and three-dimensional finite-element (FE) modeling of eight slab strips, 500×175×2,500 mm each. The investigated parameters included the volume fraction of the basalt fibers added to the concrete mix (0%, 0.5%, 1%, and 2%) and the BFRP reinforcement ratios (1.4 and 2.8 times the balanced reinforcement ratio). The effect of varying the fiber volume fraction on the mechanical properties of concrete was first assessed. The test results showed that increasing the fiber volume fraction increased the compressive strength and the modulus of rupture of the concrete. Slab strips with higher dosages of fibers showed an increased number of cracks and a considerable enhancement in their cracking and ultimate capacity. A volume fraction of 0.5% of basalt fibers had an insignificant effect on the flexural performance of the specimens, and therefore 1% of basalt fibers were recommended as a minimum dosage. Increasing the fiber volume fraction led to a noticeable increase in the ductility of the slab strips at all stages of loading. The FE models provided reasonable prediction of the nonlinear structural behavior of the slab strips. The Variable Engagement Model, initially developed for steel fiber-reinforced concrete, was assessed to describe the BFRC mixes. Good correlation between the numerical and experimental results in terms of cracking loads, load-carrying capacities, deflections, and crack pattern was obtained.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Strongly coupled XFEM formulation for non-planar three-dimensional simulation of hydraulic fracturing with emphasis on concrete dams.\n \n \n \n \n\n\n \n Roth, S.; Leger, P.; and Soulaimani, A.\n\n\n \n\n\n\n Computer Methods in Applied Mechanics and Engineering, 363. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"StronglyPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20200708182666 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Strongly coupled XFEM formulation for non-planar three-dimensional simulation of hydraulic fracturing with emphasis on concrete dams},\njournal = {Computer Methods in Applied Mechanics and Engineering},\nauthor = {Roth, Simon-Nicolas and Leger, Pierre and Soulaimani, Azzeddine},\nvolume = {363},\nyear = {2020},\nissn = {00457825},\nabstract = {This paper presents a novel and robust three-dimensional plain concrete cracking model applicable to the study of structural stability of large structures, such as dams, while considering the presence of pressurized water in propagating cracks. When leaving the elastic range, there is a transition from a continuum approach to a XFEM approach. This mechanical model is coupled with a poro-damage model where the permeability is increased as micro-cracks coalesce into macro-cracks. The crack opening computation during continuum damage is based on a local XFEM formulation without the need for a reference length in a strongly coupled hydro-mechanical formulation to update the uplift pressures. The 3D crack path computation is adapted from an analogy to the heat conduction problem to draw the envelope of the discontinuities’ tangent vector field. Six benchmark problems available from the literature, including a 96m-high arch dam, are considered and indicate the very good performance of the proposed model as well as its applicability to real industrial structures.<br/> © 2020},\nkey = {Uplift pressure},\n%keywords = {Mechanical permeability;Arches;Benchmarking;Arch dams;Stability;Concretes;Cracks;Heat conduction;Continuum damage mechanics;},\n%note = {3D cracks;Continuum damage;Hydrofracturation;Hydromechanical coupling;XFEM;},\nURL = {http://dx.doi.org/10.1016/j.cma.2020.112899},\n} \n\n\n
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\n This paper presents a novel and robust three-dimensional plain concrete cracking model applicable to the study of structural stability of large structures, such as dams, while considering the presence of pressurized water in propagating cracks. When leaving the elastic range, there is a transition from a continuum approach to a XFEM approach. This mechanical model is coupled with a poro-damage model where the permeability is increased as micro-cracks coalesce into macro-cracks. The crack opening computation during continuum damage is based on a local XFEM formulation without the need for a reference length in a strongly coupled hydro-mechanical formulation to update the uplift pressures. The 3D crack path computation is adapted from an analogy to the heat conduction problem to draw the envelope of the discontinuities’ tangent vector field. Six benchmark problems available from the literature, including a 96m-high arch dam, are considered and indicate the very good performance of the proposed model as well as its applicability to real industrial structures.
© 2020\n
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\n \n\n \n \n \n \n \n \n Piezoelectric ring-actuator technique: In-depth scrutiny of interpretation method.\n \n \n \n \n\n\n \n Hussien, M. N.; and Karray, M.\n\n\n \n\n\n\n Geotechnical Testing Journal, 44(1). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"PiezoelectricPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20200708161819 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Piezoelectric ring-actuator technique: In-depth scrutiny of interpretation method},\njournal = {Geotechnical Testing Journal},\nauthor = {Hussien, Mahmoud N. and Karray, Mourad},\nvolume = {44},\nnumber = {1},\nyear = {2020},\nissn = {01496115},\nabstract = {The piezoelectric ring-actuator technique (P-RAT) is a recent laboratory technique for the measurement of shear wave velocity (Vs) of soils. The measurement is based on transmission of a mechanical signal through the soil specimen with source and receiver transducers capsulated, for instance, in the end platens of an oedometer cell. An interpretative framework of the signals produced in the P-RAT has also been developed to minimize the subjectivity of the process and provide a consistent approach to Vs determination. However, there are some issues that would potentially affect the quality of the signals; consequently, biases of the velocity determination have not yet been explicitly discussed, such as the effects of sample and sensor characteristics as well as the signals used to excite the P-RAT sensors. P-RAT experiments on two different soils using different sensors, input signals, and oedometer cells are implemented in this study. The main purpose of the tests is not to elicit definitive information about the tested materials but to allow the P-RAT interpretation methodology to be revealed. The results suggest that this interpretation method can be beneficially used with other piezoelectric techniques (e.g., BE).<br/> Copyright © 2020 by ASTM International.},\nkey = {Soils},\n%keywords = {Actuators;Signal receivers;Acoustic wave velocity;Rats;Shear waves;Soil mechanics;Piezoelectricity;Shear flow;Wave propagation;},\n%note = {Interpretation methods;Oedometers;Piezoelectric rings;Shear wave velocity;Size effects;},\nURL = {http://dx.doi.org/10.1520/GTJ20180205},\n} \n\n\n
\n
\n\n\n
\n The piezoelectric ring-actuator technique (P-RAT) is a recent laboratory technique for the measurement of shear wave velocity (Vs) of soils. The measurement is based on transmission of a mechanical signal through the soil specimen with source and receiver transducers capsulated, for instance, in the end platens of an oedometer cell. An interpretative framework of the signals produced in the P-RAT has also been developed to minimize the subjectivity of the process and provide a consistent approach to Vs determination. However, there are some issues that would potentially affect the quality of the signals; consequently, biases of the velocity determination have not yet been explicitly discussed, such as the effects of sample and sensor characteristics as well as the signals used to excite the P-RAT sensors. P-RAT experiments on two different soils using different sensors, input signals, and oedometer cells are implemented in this study. The main purpose of the tests is not to elicit definitive information about the tested materials but to allow the P-RAT interpretation methodology to be revealed. The results suggest that this interpretation method can be beneficially used with other piezoelectric techniques (e.g., BE).
Copyright © 2020 by ASTM International.\n
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\n \n\n \n \n \n \n \n \n Numerical modelling of the out-of-plane response of full-scale brick masonry prototypes subjected to incremental dynamic shake-table tests.\n \n \n \n \n\n\n \n Malomo, D.; Pinho, R.; and Penna, A.\n\n\n \n\n\n\n Engineering Structures, 209. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20200708160682 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical modelling of the out-of-plane response of full-scale brick masonry prototypes subjected to incremental dynamic shake-table tests},\njournal = {Engineering Structures},\nauthor = {Malomo, Daniele and Pinho, Rui and Penna, Andrea},\nvolume = {209},\nyear = {2020},\nissn = {01410296},\nabstract = {Structural failure of existing unreinforced masonry buildings, when subjected to earthquake loading, is often caused by the out-of-plane response of masonry walls. Their out-of-plane resistance could vary considerably depending on several factors, such as boundary conditions, vertical overburden and construction technique. Amongst the latter, the cavity wall system, originally introduced in Northwest Europe in the 19th century and then spread to several countries including USA, Canada, China, Australia and New Zealand, has been shown to be particularly vulnerable towards out-of-plane actions. In this work, the use of the Applied Element Method was investigated and subsequently considered for reproducing the experimentally observed out-of-plane shake-table response of unreinforced masonry full-scale cavity wall specimens subjected to both one-way and two-way bending. Finally, given the adequate results obtained and aimed at investigating further both potential limits and actual capabilities of the adopted modelling strategy, the latter was also extended to the simulation of the dynamic out-of-plane-governed failure mode of a full-scale building specimen tested up to complete collapse.<br/> © 2020 Elsevier Ltd},\nkey = {Numerical models},\n%keywords = {Failure (mechanical);Fracture mechanics;Masonry construction;Retaining walls;Numerical methods;Walls (structural partitions);Masonry materials;},\n%note = {Construction technique;Element method;Modelling strategies;Out-of plane;Out-of-plane response;Shake table;Unreinforced masonry;Unreinforced masonry building;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2020.110298},\n} \n\n\n
\n
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\n Structural failure of existing unreinforced masonry buildings, when subjected to earthquake loading, is often caused by the out-of-plane response of masonry walls. Their out-of-plane resistance could vary considerably depending on several factors, such as boundary conditions, vertical overburden and construction technique. Amongst the latter, the cavity wall system, originally introduced in Northwest Europe in the 19th century and then spread to several countries including USA, Canada, China, Australia and New Zealand, has been shown to be particularly vulnerable towards out-of-plane actions. In this work, the use of the Applied Element Method was investigated and subsequently considered for reproducing the experimentally observed out-of-plane shake-table response of unreinforced masonry full-scale cavity wall specimens subjected to both one-way and two-way bending. Finally, given the adequate results obtained and aimed at investigating further both potential limits and actual capabilities of the adopted modelling strategy, the latter was also extended to the simulation of the dynamic out-of-plane-governed failure mode of a full-scale building specimen tested up to complete collapse.
© 2020 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Effect of Ductile Shear Wall Ratio and Cross-Section Configuration on Seismic Behavior of Reinforced Concrete Masonry Shear Wall Buildings.\n \n \n \n \n\n\n \n Aly, N.; and Galal, K.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(4). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"EffectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20200408086964 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of Ductile Shear Wall Ratio and Cross-Section Configuration on Seismic Behavior of Reinforced Concrete Masonry Shear Wall Buildings},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Aly, Nader and Galal, Khaled},\nvolume = {146},\nnumber = {4},\nyear = {2020},\nissn = {07339445},\nabstract = {Reinforced masonry buildings typically have a load-bearing wall structural system. Thus, the reinforced masonry shear walls must be capable of resisting both vertical forces from gravity loads and lateral forces from seismic and wind loads. Typically, because the walls are subjected to high axial loads, ensuring the ductile response becomes challenging. A possible solution at the component level would be the utilization of walls with confined ends (i.e., walls with boundary elements) to reduce the compression zone and increase the compression strain. Another solution, which is at the system level, is the introduction of a hybrid structural system composed of two types of walls: (1) ductile walls with or without boundary elements to resist the lateral forces and part of vertical forces, and (2) gravity walls that resist only axial loads. This paper proposes a combination of both solutions (i.e., at component and system levels). Additionally, it utilizes a series of linear and nonlinear static and dynamic analyses to evaluate and quantify the effect of cross-section configuration and ductile shear wall area to total floor area (i.e., ductile shear wall ratio) on the seismic response of masonry buildings. The numerical analyses are performed by a macro model detailed to simulate the nonlinear response. The primary objective is to recommend a range of ductile shear wall ratios that optimize the design and overall performance. The study targets mid-rise and high-rise masonry buildings located in regions with moderate seismic hazard. The findings emphasize that utilizing the ductile walls with boundary elements in the proposed hybrid structural system resulted in major favorable enhancements in the structural response and optimization of the design. In addition, the results demonstrate the possibility of vertically reducing and terminating the specially detailed boundary elements, thus promoting ductile reinforced concrete masonry shear wall buildings as a competitive building system.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Seismic response},\n%keywords = {Axial loads;Structural design;Ductility;Boundary element method;Reinforced concrete;Architectural design;Shear flow;Shear walls;},\n%note = {Boundary elements;Hybrid structural system;Load bearing walls;Non-linear response;Reinforced concrete masonry;Reinforced masonry;Structural response;Structural systems;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002542},\n} \n\n\n
\n
\n\n\n
\n Reinforced masonry buildings typically have a load-bearing wall structural system. Thus, the reinforced masonry shear walls must be capable of resisting both vertical forces from gravity loads and lateral forces from seismic and wind loads. Typically, because the walls are subjected to high axial loads, ensuring the ductile response becomes challenging. A possible solution at the component level would be the utilization of walls with confined ends (i.e., walls with boundary elements) to reduce the compression zone and increase the compression strain. Another solution, which is at the system level, is the introduction of a hybrid structural system composed of two types of walls: (1) ductile walls with or without boundary elements to resist the lateral forces and part of vertical forces, and (2) gravity walls that resist only axial loads. This paper proposes a combination of both solutions (i.e., at component and system levels). Additionally, it utilizes a series of linear and nonlinear static and dynamic analyses to evaluate and quantify the effect of cross-section configuration and ductile shear wall area to total floor area (i.e., ductile shear wall ratio) on the seismic response of masonry buildings. The numerical analyses are performed by a macro model detailed to simulate the nonlinear response. The primary objective is to recommend a range of ductile shear wall ratios that optimize the design and overall performance. The study targets mid-rise and high-rise masonry buildings located in regions with moderate seismic hazard. The findings emphasize that utilizing the ductile walls with boundary elements in the proposed hybrid structural system resulted in major favorable enhancements in the structural response and optimization of the design. In addition, the results demonstrate the possibility of vertically reducing and terminating the specially detailed boundary elements, thus promoting ductile reinforced concrete masonry shear wall buildings as a competitive building system.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Low-cycle fatigue of stainless steel plates under large plastic strain demands.\n \n \n \n \n\n\n \n Annan, C.; and Beaumont, E.\n\n\n \n\n\n\n Journal of Building Engineering, 29. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"Low-cyclePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20200508119056 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Low-cycle fatigue of stainless steel plates under large plastic strain demands},\njournal = {Journal of Building Engineering},\nauthor = {Annan, Charles-Darwin and Beaumont, Eric},\nvolume = {29},\nyear = {2020},\nissn = {23527102},\nabstract = {The low-cycle characteristics of structural subassemblies under large cyclic strains play an important role in contemporary seismic design. Obtaining these characteristics can lead to an understanding of a structure's degradation and nonlinear response behaviour, and can serve as a basis for developing efficient numerical models to predict seismic collapse mechanisms. The austenitic stainless tubular grade of steel has shown promise in terms of strain hardening character, structural overstrength and ductility, but existing test data is limited or constrained to small plastic strains, which is hardly useful in earthquake engineering applications. This article presents an experimental study designed to characterize the hysteresis of stainless steel plates under large inelastic cyclic strains and to assess their potential use in buckling-restrained brace components for seismic applications. Axial coupons machined from austenitic Grade 304L stainless steel and from regular carbon steel Grade 350WT were tested under uniaxial tensile loading, as well as constant and variable strain amplitude cyclic loadings. Results of the uniaxial tests confirmed higher ductility and strain hardening capacity for the stainless steel plates compared to those of carbon steels. These results were subsequently used to validate a novel technique based on image analysis to derive the true stress-strain characteristics. The stainless steel Grade 304L plates showed higher cyclic hardening but shorter low-cycle fatigue life compared to the carbon steel. Parameters for representing the low-cycle fatigue behavior of these materials, useful for developing a cyclic plasticity hardening numerical model, were derived from the test data.<br/> © 2019 Elsevier Ltd},\nkey = {Ductility},\n%keywords = {Austenitic stainless steel;Seismology;Strain;Low-cycle fatigue;Plastic deformation;Strain hardening;Plasticity;Numerical models;Hysteresis;Plates (structural components);Seismic design;},\n%note = {Cyclic hardening;Cyclic plasticity models;Cyclic stress-strain response;Hysteretic behaviour;Low cycle fatigues;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2019.101160},\n} \n\n\n
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\n The low-cycle characteristics of structural subassemblies under large cyclic strains play an important role in contemporary seismic design. Obtaining these characteristics can lead to an understanding of a structure's degradation and nonlinear response behaviour, and can serve as a basis for developing efficient numerical models to predict seismic collapse mechanisms. The austenitic stainless tubular grade of steel has shown promise in terms of strain hardening character, structural overstrength and ductility, but existing test data is limited or constrained to small plastic strains, which is hardly useful in earthquake engineering applications. This article presents an experimental study designed to characterize the hysteresis of stainless steel plates under large inelastic cyclic strains and to assess their potential use in buckling-restrained brace components for seismic applications. Axial coupons machined from austenitic Grade 304L stainless steel and from regular carbon steel Grade 350WT were tested under uniaxial tensile loading, as well as constant and variable strain amplitude cyclic loadings. Results of the uniaxial tests confirmed higher ductility and strain hardening capacity for the stainless steel plates compared to those of carbon steels. These results were subsequently used to validate a novel technique based on image analysis to derive the true stress-strain characteristics. The stainless steel Grade 304L plates showed higher cyclic hardening but shorter low-cycle fatigue life compared to the carbon steel. Parameters for representing the low-cycle fatigue behavior of these materials, useful for developing a cyclic plasticity hardening numerical model, were derived from the test data.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Evaluation of an integrated sewage pipe with ground heat exchanger for long-term efficiency estimation.\n \n \n \n \n\n\n \n Dacquay, C.; Hollander, H. M.; Kavgic, M.; Maghoul, P.; Liu, H.; and Fujii, H.\n\n\n \n\n\n\n Geothermics, 86. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"EvaluationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20200508119274 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evaluation of an integrated sewage pipe with ground heat exchanger for long-term efficiency estimation},\njournal = {Geothermics},\nauthor = {Dacquay, Connor and Hollander, Hartmut M. and Kavgic, Miroslava and Maghoul, Pooneh and Liu, Hongwei and Fujii, Hikari},\nvolume = {86},\nyear = {2020},\nissn = {03756505},\nabstract = {<div data-language="eng" data-ev-field="abstract">Extracting heat from a sewage pipe through a typical horizontal ground heat exchanger has recently been introduced as a renewable energy alternative to reduce fossil fuel usage. This paper presents a novel design for a ground heat exchanger that extracts heat from the surrounding soil and sewage within the pipe while simultaneously being carried to a wastewater treatment plant. This research focuses on the long-term efficiency of the system under transient conditions in a cold climate. A numerical model using COMSOL Multiphysics was developed to verify the sustainability of the system for over 25 years. The model used constant inlet fluid temperatures to evaluate heat transfer with convective pipe flow and conductive phase change within the soil. The results showed a maximum temperature change in the surrounding soil adjacent to the heat extraction system over 25 years was 0.10 °C during the heating season in Winnipeg, Manitoba. The distance at which the heat extraction system did not show an impact on temperature change of adjacent soil was determined at 4 m. Critical parameters in this evaluation were system depth, sewage level, and the high-density polyethylene pipe thermal properties. The sustainability of the system was not affected by the system depth due to thermal balancing between climatic, subsurface and sewage heat fluxes. Sustainable behavior was achieved at 50 % and 75 % of sewage pipe capacity. The effect on thermal performance from the high-density polyethylene pipe thermal properties was deemed insignificant.<br/></div> © 2019 Elsevier Ltd},\nkey = {Numerical models},\n%keywords = {Extraction;Fossil fuels;Geothermal energy;Heat exchangers;Heat transfer;Polyethylenes;Serpentine;Sewage;Soils;Sustainable development;Thermodynamic properties;Wastewater treatment;},\n%note = {Efficiency estimation;Extraction systems;Geothermal;Ground heat exchangers;Heat extraction;High density polyethylene pipes;Renewable energies;Sewage pipes;Surrounding soils;Temperature changes;},\nURL = {http://dx.doi.org/10.1016/j.geothermics.2019.101796},\n} \n\n\n
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Extracting heat from a sewage pipe through a typical horizontal ground heat exchanger has recently been introduced as a renewable energy alternative to reduce fossil fuel usage. This paper presents a novel design for a ground heat exchanger that extracts heat from the surrounding soil and sewage within the pipe while simultaneously being carried to a wastewater treatment plant. This research focuses on the long-term efficiency of the system under transient conditions in a cold climate. A numerical model using COMSOL Multiphysics was developed to verify the sustainability of the system for over 25 years. The model used constant inlet fluid temperatures to evaluate heat transfer with convective pipe flow and conductive phase change within the soil. The results showed a maximum temperature change in the surrounding soil adjacent to the heat extraction system over 25 years was 0.10 °C during the heating season in Winnipeg, Manitoba. The distance at which the heat extraction system did not show an impact on temperature change of adjacent soil was determined at 4 m. Critical parameters in this evaluation were system depth, sewage level, and the high-density polyethylene pipe thermal properties. The sustainability of the system was not affected by the system depth due to thermal balancing between climatic, subsurface and sewage heat fluxes. Sustainable behavior was achieved at 50 % and 75 % of sewage pipe capacity. The effect on thermal performance from the high-density polyethylene pipe thermal properties was deemed insignificant.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Hydraulic Model Calibration Using Water Levels Derived from Time Series High-Resolution SAR Images.\n \n \n \n \n\n\n \n Desrochers, N. M.; Trudel, M.; Peters, D. L.; Siles, G.; and Leconte, R.\n\n\n \n\n\n\n Journal of Hydraulic Engineering, 146(4). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"HydraulicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20200508102343 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Hydraulic Model Calibration Using Water Levels Derived from Time Series High-Resolution SAR Images},\njournal = {Journal of Hydraulic Engineering},\nauthor = {Desrochers, Nicolas M. and Trudel, Melanie and Peters, Daniel L. and Siles, Gabriela and Leconte, Robert},\nvolume = {146},\nnumber = {4},\nyear = {2020},\nissn = {07339429},\nabstract = {Hydraulic models require water extents (WE) and water levels (WL) for their calibration and validation. The synthetic aperture radar (SAR) has been readily used in the past to delineate water bodies and extract WL from the digital terrain model (DTM). However, studies using SAR data to calibrate hydraulic models have been carried out with a limited number of images. This study aims to use WL derived from a time series of high-resolution (5 m) Radarsat-2 SAR images to calibrate a one-dimensional model (HEC-RAS) using an automated algorithm on a 40-km reach of the Athabasca River in Alberta, Canada. Eighteen images, spanning 2012-2016, were processed to extract WL using a high-resolution (2 m) DTM that combined light detection and ranging (LiDAR) data and bathymetry acquired by boat surveying. The impact of the number of images used for the calibration has been assessed. The best root mean square error in validation between the SAR-derived and simulated WL was 0.28 m using seven images. Finally, a critical success index (CSI) was performed to compare the SAR-derived and simulated WE. No significant change in CSI was observed because of riverbank steepness.<br/> © 2020 American Society of Civil Engineers.},\nkey = {Synthetic aperture radar},\n%keywords = {Time series;Mean square error;Optical radar;Radar imaging;Water levels;Hydraulic models;},\n%note = {Automated algorithms;Best root mean square error;Calibration and validations;Digital terrain model;Flood mapping;Hydraulic model calibration;Light detection and ranging;One-dimensional model;},\nURL = {http://dx.doi.org/10.1061/(ASCE)HY.1943-7900.0001687},\n} \n\n\n
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\n Hydraulic models require water extents (WE) and water levels (WL) for their calibration and validation. The synthetic aperture radar (SAR) has been readily used in the past to delineate water bodies and extract WL from the digital terrain model (DTM). However, studies using SAR data to calibrate hydraulic models have been carried out with a limited number of images. This study aims to use WL derived from a time series of high-resolution (5 m) Radarsat-2 SAR images to calibrate a one-dimensional model (HEC-RAS) using an automated algorithm on a 40-km reach of the Athabasca River in Alberta, Canada. Eighteen images, spanning 2012-2016, were processed to extract WL using a high-resolution (2 m) DTM that combined light detection and ranging (LiDAR) data and bathymetry acquired by boat surveying. The impact of the number of images used for the calibration has been assessed. The best root mean square error in validation between the SAR-derived and simulated WL was 0.28 m using seven images. Finally, a critical success index (CSI) was performed to compare the SAR-derived and simulated WE. No significant change in CSI was observed because of riverbank steepness.
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Experimental Evaluation of Inelastic Higher-Mode Effects on the Seismic Behavior of RC Structural Walls.\n \n \n \n \n\n\n \n Fatemi, H.; Paultre, P.; and Lamarche, C.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(4). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20200408086962 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental Evaluation of Inelastic Higher-Mode Effects on the Seismic Behavior of RC Structural Walls},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Fatemi, Hassan and Paultre, Patrick and Lamarche, Charles-Phillipe},\nvolume = {146},\nnumber = {4},\nyear = {2020},\nissn = {07339445},\nabstract = {Most midrise and high-rise reinforced concrete (RC) buildings rely on RC structural walls as their seismic force resisting system. The contribution of higher lateral modes to the elastic response of RC structural walls produces base shear forces significantly larger than those resulting from the static code procedure. The relative contribution of higher lateral modes increases due to an additional dynamic effect occurring while the RC wall is yielding at the base. Accordingly, the first-mode contribution saturates and reduces as its corresponding period elongates and higher modes assume a more relative contribution. This paper describes an original pseudodynamic hybrid test that has been used to experimentally measure the shear amplification during an earthquake excitation of a model shear wall structure. The experimental results show that the shear amplification factor due to nonlinear higher modes effects can be larger than 1.5. Additionally, the test results indicate that the modern structural codes appear to be conservative in calculating the shear force resistance of RC structural walls.<br/> © 2020 This work is made available under the terms of the Creative Commons Attribution 4.0 International license,.},\nkey = {Reinforced concrete},\n%keywords = {Seismology;Shear flow;Shear walls;},\n%note = {Earthquake excitation;Experimental evaluation;Higher-mode effects;Hybrid tests;Relative contribution;Shear force;Shear wall structure;Structural walls;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002509},\n} \n\n\n
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\n Most midrise and high-rise reinforced concrete (RC) buildings rely on RC structural walls as their seismic force resisting system. The contribution of higher lateral modes to the elastic response of RC structural walls produces base shear forces significantly larger than those resulting from the static code procedure. The relative contribution of higher lateral modes increases due to an additional dynamic effect occurring while the RC wall is yielding at the base. Accordingly, the first-mode contribution saturates and reduces as its corresponding period elongates and higher modes assume a more relative contribution. This paper describes an original pseudodynamic hybrid test that has been used to experimentally measure the shear amplification during an earthquake excitation of a model shear wall structure. The experimental results show that the shear amplification factor due to nonlinear higher modes effects can be larger than 1.5. Additionally, the test results indicate that the modern structural codes appear to be conservative in calculating the shear force resistance of RC structural walls.
© 2020 This work is made available under the terms of the Creative Commons Attribution 4.0 International license,.\n
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\n \n\n \n \n \n \n \n \n Numerical simulation of entropy generation due to natural convection heat transfer using Kernel Derivative-Free (KDF) Incompressible Smoothed Particle Hydrodynamics (ISPH) model.\n \n \n \n \n\n\n \n Garoosi, F.; and Shakibaeinia, A.\n\n\n \n\n\n\n International Journal of Heat and Mass Transfer, 150. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20200408081495 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical simulation of entropy generation due to natural convection heat transfer using Kernel Derivative-Free (KDF) Incompressible Smoothed Particle Hydrodynamics (ISPH) model},\njournal = {International Journal of Heat and Mass Transfer},\nauthor = {Garoosi, Faroogh and Shakibaeinia, Ahmad},\nvolume = {150},\nyear = {2020},\nissn = {00179310},\nabstract = {This paper develops and applies a Kernel Derivative-Free (KDF) Incompressible Smoothed Particle Hydrodynamics (ISPH) model for analysis of entropy generation and heat transfer in fluid-structure coupling problems. A modified high order Laplacian operator is applied for the treatment of pressure-velocity coupling (Poisson's equation), while an explicit third-order TVD Runge-Kutta scheme is used for time integration of the momentum, energy and displacement equations. To improve the consistency and stability of the model, a new particle regularization technique based on the particle shifting is also introduced for simulating free-surface flows. The developed KDF-ISPH model is validated and evaluated for a series of challenging benchmark cases, including, dam break, stretching water drop, rotating square patch of fluid, and natural convection in square cavity. Accuracy and applicability of the method are further validated by analyzing entropy generation due to the natural convection heat transfer in three well-known geometries including: square cavity with hot obstacle inside, C-shaped enclosure, and square enclosure containing a pair of hot and cold horizontal pipes (heat exchanger). The results are found to be in good agreement with available numerical and experimental data. The accuracy of the developed KDF-ISPH with new Laplacian operator, for use in prediction of fluid flow and heat transfer characteristics is also proven. Finally, by combining the cosine and signal functions, a new high order smoothing kernel is constructed. The evaluation of this new kernel for the propagation of shock wave in 1D tube demonstrates better global stability and consistency properties compared to two frequently used SPH kernels (i.e. cubic and quintic spline functions).<br/> © 2020},\nkey = {Natural convection},\n%keywords = {Entropy;Heat exchangers;Poisson equation;Shock waves;Mathematical operators;Hydrodynamics;Fluid structure interaction;Laplace transforms;Horizontal wells;Runge Kutta methods;Enclosures;},\n%note = {Consistency and stabilities;Fluid flow and heat transfers;KDF-ISPH;Kernel function;Laplacian model;Pressure-velocity coupling;Smoothed particle hydrodynamics;Third order;},\nURL = {http://dx.doi.org/10.1016/j.ijheatmasstransfer.2020.119377},\n} \n\n\n
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\n This paper develops and applies a Kernel Derivative-Free (KDF) Incompressible Smoothed Particle Hydrodynamics (ISPH) model for analysis of entropy generation and heat transfer in fluid-structure coupling problems. A modified high order Laplacian operator is applied for the treatment of pressure-velocity coupling (Poisson's equation), while an explicit third-order TVD Runge-Kutta scheme is used for time integration of the momentum, energy and displacement equations. To improve the consistency and stability of the model, a new particle regularization technique based on the particle shifting is also introduced for simulating free-surface flows. The developed KDF-ISPH model is validated and evaluated for a series of challenging benchmark cases, including, dam break, stretching water drop, rotating square patch of fluid, and natural convection in square cavity. Accuracy and applicability of the method are further validated by analyzing entropy generation due to the natural convection heat transfer in three well-known geometries including: square cavity with hot obstacle inside, C-shaped enclosure, and square enclosure containing a pair of hot and cold horizontal pipes (heat exchanger). The results are found to be in good agreement with available numerical and experimental data. The accuracy of the developed KDF-ISPH with new Laplacian operator, for use in prediction of fluid flow and heat transfer characteristics is also proven. Finally, by combining the cosine and signal functions, a new high order smoothing kernel is constructed. The evaluation of this new kernel for the propagation of shock wave in 1D tube demonstrates better global stability and consistency properties compared to two frequently used SPH kernels (i.e. cubic and quintic spline functions).
© 2020\n
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\n \n\n \n \n \n \n \n \n Design of Bolted Single Shear Lap Connection with Different Thicknesses of Splice Plates.\n \n \n \n \n\n\n \n Tremblay, R.; and Davaran, A.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(3). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"DesignPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20200308033859 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design of Bolted Single Shear Lap Connection with Different Thicknesses of Splice Plates},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Tremblay, Robert and Davaran, Ali},\nvolume = {146},\nnumber = {3},\nyear = {2020},\nissn = {07339445},\nabstract = {A method based on elastic stability analysis to design bolted single shear lap (SSL) connections, which are traditionally used for hollow structural section (HSS) bracing members, is proposed in this paper. The method includes connections with different lap plate thicknesses. An approximate nonlinear analysis method is also presented to mimic the inelastic buckling and post-buckling response of the connections. These approaches are validated by the existing experimental results of three X-bracing specimens and by the numerical results obtained from nonlinear finite element (FE) analysis. The results show that the design procedure proposed by the current guidelines for the HSS can be improved using the calculated effective length factor of this study. Lastly, a stiffened SSL connection detail is suggested for X-bracings and is assessed through the employed analytical methods. This detail is efficiently able to prevent the formation of the three-hinge buckling mode in SSL connections by omitting one of the involved plastic hinges. By using this detail, the compression strength of the connections is enhanced to a level that is normally demanded by special concentric braced frames (SCBF).<br/> © 2020 American Society of Civil Engineers.},\nkey = {Buckling},\n%keywords = {Design;Nonlinear analysis;Plates (structural components);},\n%note = {Compression strength;Effective length factor;Hollow structural sections;Non-linear finite-element analysis;Nonlinear analysis methods;Sigmoid function;Special concentric braced frames;x-Bracing;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002455},\n} \n\n\n
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\n A method based on elastic stability analysis to design bolted single shear lap (SSL) connections, which are traditionally used for hollow structural section (HSS) bracing members, is proposed in this paper. The method includes connections with different lap plate thicknesses. An approximate nonlinear analysis method is also presented to mimic the inelastic buckling and post-buckling response of the connections. These approaches are validated by the existing experimental results of three X-bracing specimens and by the numerical results obtained from nonlinear finite element (FE) analysis. The results show that the design procedure proposed by the current guidelines for the HSS can be improved using the calculated effective length factor of this study. Lastly, a stiffened SSL connection detail is suggested for X-bracings and is assessed through the employed analytical methods. This detail is efficiently able to prevent the formation of the three-hinge buckling mode in SSL connections by omitting one of the involved plastic hinges. By using this detail, the compression strength of the connections is enhanced to a level that is normally demanded by special concentric braced frames (SCBF).
© 2020 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Shake table tests of highway bridges installed with unbonded steel mesh reinforced rubber bearings.\n \n \n \n \n\n\n \n Li, H.; Xie, Y.; Gu, Y.; Tian, S.; Yuan, W.; and DesRoches, R.\n\n\n \n\n\n\n Engineering Structures, 206. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ShakePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20200107982954 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shake table tests of highway bridges installed with unbonded steel mesh reinforced rubber bearings},\njournal = {Engineering Structures},\nauthor = {Li, Han and Xie, Yazhou and Gu, Yitong and Tian, Shengze and Yuan, Wancheng and DesRoches, Reginald},\nvolume = {206},\nyear = {2020},\nissn = {01410296},\nabstract = {Previous earthquakes in China have caused significant seismic damage in short-to-medium span highway bridges due to the uncontrollable sliding of unbonded laminated rubber bearings (ULNRs). This paper investigates the soundness of replacing the ULNRs in these bridges with novel unbonded steel mesh reinforced rubber bearings (USRBs). Distinct from ULNRs that use rigid steel plates, USRBs are reinforced by flexible high-strength steel meshes to enable large and stable rollover deformations when subjected to strong earthquakes. To this end, shake table tests have been carried out for a two-span steel girder bridge that is isolated by ULNRs and USRBs, respectively. The test bridge was designed with a scale factor of 1/15 by maintaining the similarity of the deck mass, pier longitudinal stiffness, and bearing lateral stiffness for a typical prototype bridge in high seismic zones in China. Various types of sensors were used to monitor the dynamic responses of the bridge when excited by four different sets of earthquake motions. Test results show that USRBs not only exhibit a higher isolation efficiency in limiting the deck inertia force, but also outperform ULNRs in controlling the sliding of the bearings. Moreover, a phenomenological material model is utilized to simulate the hysteretic behavior of the USRBs, where the bridge's time-history responses have been validated against the experimental outcomes. This paper illustrates that the use of USRBs can be a cost-effective, robust, and reliable substitute for the ULNRs to enhance the seismic resilience of the transportation infrastructure in China.<br/> © 2019 Elsevier Ltd},\nkey = {Stiffness},\n%keywords = {Highway bridges;Bearings (structural);Laminating;Cost effectiveness;Rubber;Hysteresis;Nonmetallic bearings;Reinforcement;Deformation;Earthquakes;Mesh generation;Testing;},\n%note = {Isolation efficiencies;Laminated rubber bearings;Longitudinal stiffness;Reinforced rubber;Seismic isolation;Shake table tests;Time history response;Transportation infrastructures;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2019.110124},\n} \n\n\n
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\n Previous earthquakes in China have caused significant seismic damage in short-to-medium span highway bridges due to the uncontrollable sliding of unbonded laminated rubber bearings (ULNRs). This paper investigates the soundness of replacing the ULNRs in these bridges with novel unbonded steel mesh reinforced rubber bearings (USRBs). Distinct from ULNRs that use rigid steel plates, USRBs are reinforced by flexible high-strength steel meshes to enable large and stable rollover deformations when subjected to strong earthquakes. To this end, shake table tests have been carried out for a two-span steel girder bridge that is isolated by ULNRs and USRBs, respectively. The test bridge was designed with a scale factor of 1/15 by maintaining the similarity of the deck mass, pier longitudinal stiffness, and bearing lateral stiffness for a typical prototype bridge in high seismic zones in China. Various types of sensors were used to monitor the dynamic responses of the bridge when excited by four different sets of earthquake motions. Test results show that USRBs not only exhibit a higher isolation efficiency in limiting the deck inertia force, but also outperform ULNRs in controlling the sliding of the bearings. Moreover, a phenomenological material model is utilized to simulate the hysteretic behavior of the USRBs, where the bridge's time-history responses have been validated against the experimental outcomes. This paper illustrates that the use of USRBs can be a cost-effective, robust, and reliable substitute for the ULNRs to enhance the seismic resilience of the transportation infrastructure in China.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Seismic Fragility Assessment and Resilience of Reinforced Masonry Flanged Wall Systems.\n \n \n \n \n\n\n \n Hosseinzadeh, S.; and Galal, K.\n\n\n \n\n\n\n Journal of Performance of Constructed Facilities, 34(1). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20195207905796 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic Fragility Assessment and Resilience of Reinforced Masonry Flanged Wall Systems},\njournal = {Journal of Performance of Constructed Facilities},\nauthor = {Hosseinzadeh, Shadman and Galal, Khaled},\nvolume = {34},\nnumber = {1},\nyear = {2020},\nissn = {08873828},\nabstract = {Several experimental and analytical studies have evaluated the seismic response of reinforced masonry (RM) shear walls either as a component (i.e., planar rectangular walls) or as a system (i.e., building consisting planar walls). In the current study, five RM flanged walls were assessed for their seismic performance and collapse capacity. The impact of utilizing flanged walls was assessed and characterized through recent available guidelines. In this respect, a 2-D fiber-based modeling approach has been developed using the Open System for Earthquake Engineering Simulation software. The results indicate that the selected RM flanged walls can satisfy the acceptable criteria proposed by the methodology. The seismic resilience of the archetypes against the expected collapse risk was evaluated in terms of functionality curves before and after the use of the flanges in the walls. Damage levels were considered as performance level functions correlated to earthquake intensity and were used to estimate total loss and recovery time of the archetypes. The selected RM flanged walls showed enhanced earthquake resilience and less damage than rectangular RM shear walls.<br/> © 2019 American Society of Civil Engineers.},\nkey = {Earthquake engineering},\n%keywords = {Computer software;Masonry materials;Shear walls;Open systems;Risk assessment;Earthquakes;Reinforcement;Engineering geology;},\n%note = {Collapse margin ratio;Collapse risks;Incremental dynamic analysis;Reinforced masonry;Seismic parameters;Seismic resilience;},\nURL = {http://dx.doi.org/10.1061/(ASCE)CF.1943-5509.0001383},\n} \n\n\n
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\n Several experimental and analytical studies have evaluated the seismic response of reinforced masonry (RM) shear walls either as a component (i.e., planar rectangular walls) or as a system (i.e., building consisting planar walls). In the current study, five RM flanged walls were assessed for their seismic performance and collapse capacity. The impact of utilizing flanged walls was assessed and characterized through recent available guidelines. In this respect, a 2-D fiber-based modeling approach has been developed using the Open System for Earthquake Engineering Simulation software. The results indicate that the selected RM flanged walls can satisfy the acceptable criteria proposed by the methodology. The seismic resilience of the archetypes against the expected collapse risk was evaluated in terms of functionality curves before and after the use of the flanges in the walls. Damage levels were considered as performance level functions correlated to earthquake intensity and were used to estimate total loss and recovery time of the archetypes. The selected RM flanged walls showed enhanced earthquake resilience and less damage than rectangular RM shear walls.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n An enhanced weakly-compressible MPS method for free-surface flows.\n \n \n \n \n\n\n \n Jandaghian, M.; and Shakibaeinia, A.\n\n\n \n\n\n\n Computer Methods in Applied Mechanics and Engineering, 360. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20195107881851 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An enhanced weakly-compressible MPS method for free-surface flows},\njournal = {Computer Methods in Applied Mechanics and Engineering},\nauthor = {Jandaghian, M. and Shakibaeinia, A.},\nvolume = {360},\nyear = {2020},\nissn = {00457825},\nabstract = {Similar to other particle methods, the Weakly-Compressible MPS (WC-MPS) is known to suffer from numerical instabilities and unphysical pressure fluctuations. Here we develop, adapt and evaluate a series of enhancement techniques to improve the stability and accuracy of this numerical approach. This includes a new conservative pressure gradient formulation and its conjugate form of the continuity equation supplied with a new diffusive term to reduce the numerical error related to the false diffusion. As a regularization technique, we have also adapted and modified the particle shifting algorithm (with near-surface special treatment) in combination with the pair-wise particle collision method to avoid particle clustering and associated noises. The impact of each of these enhancement techniques is evaluated and quantified using popular benchmark cases, i.e. hydrostatic pressure tank, elliptical water drops, rotating square patch of fluid, and dam-break problems. While the results confirm the effectiveness of all the enhancement techniques, the additional diffusive term is found to play a key role in increasing stability and eliminating the high-frequency pressure noises. Furthermore, results show that for the cases with large interfacial deformations, the developed particle shifting algorithm is essential for maintaining the smoothness of the free-surface region and avoiding unwanted fragmentation.<br/> © 2019 Elsevier B.V.},\nkey = {Convergence of numerical methods},\n%keywords = {Clustering algorithms;Hydrostatic pressure;Surface treatment;},\n%note = {Continuity equations;Interfacial deformations;Mesh-free particle methods;Numerical instability;Pressure fluctuation;Regularization technique;Semi-implicit;Stability and convergence;},\nURL = {http://dx.doi.org/10.1016/j.cma.2019.112771},\n} \n\n\n
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\n Similar to other particle methods, the Weakly-Compressible MPS (WC-MPS) is known to suffer from numerical instabilities and unphysical pressure fluctuations. Here we develop, adapt and evaluate a series of enhancement techniques to improve the stability and accuracy of this numerical approach. This includes a new conservative pressure gradient formulation and its conjugate form of the continuity equation supplied with a new diffusive term to reduce the numerical error related to the false diffusion. As a regularization technique, we have also adapted and modified the particle shifting algorithm (with near-surface special treatment) in combination with the pair-wise particle collision method to avoid particle clustering and associated noises. The impact of each of these enhancement techniques is evaluated and quantified using popular benchmark cases, i.e. hydrostatic pressure tank, elliptical water drops, rotating square patch of fluid, and dam-break problems. While the results confirm the effectiveness of all the enhancement techniques, the additional diffusive term is found to play a key role in increasing stability and eliminating the high-frequency pressure noises. Furthermore, results show that for the cases with large interfacial deformations, the developed particle shifting algorithm is essential for maintaining the smoothness of the free-surface region and avoiding unwanted fragmentation.
© 2019 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n An overview of the acoustic studies of bone-like porous materials, and the effect of transverse acoustic waves.\n \n \n \n \n\n\n \n Hodaei, M.; Maghoul, P.; and Popplewell, N.\n\n\n \n\n\n\n International Journal of Engineering Science, 147. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20195007803050 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An overview of the acoustic studies of bone-like porous materials, and the effect of transverse acoustic waves},\njournal = {International Journal of Engineering Science},\nauthor = {Hodaei, M. and Maghoul, P. and Popplewell, N.},\nvolume = {147},\nyear = {2020},\nissn = {00207225},\nabstract = {In this paper, the effects of transverse acoustic waves in characterizing a bone-like, porous medium filled with a viscous fluid are analyzed for the first time. Scattering operators along with stress fields are derived by using the standard Biot-JKD model. A short duration acoustical pulse is applied to one side of a bone-like, porous medium so that both longitudinal and transverse waves travel through the intermediate medium which is filled with a viscous fluid. The reflection and transmission operators along with stresses in the medium are expressed in terms of these waves. The numerical implementation is validated for the longitudinal wave by comparison with the numerical simulation performed by Fellah, Chapelon, Berger, Lauriks, and Depollier (2004). The effects of the transverse waves on the reflection and transmission coefficients as well as the stress field are studied by considering different viscosities and porosities. It is shown that when the fluid viscosity in the medium is relatively high (such as bone marrow), the effect of the transverse wave dominates. However, this effect is negligible when the medium is filled with a relatively low viscous fluid (such as air). Furthermore, it is shown that the role of transverse waves in characterizing bone structures and bone loss is imperative since the acoustical response of such media at specific frequencies can be triggered only by considering the effects of transverse waves.<br/> © 2019 Elsevier Ltd},\nkey = {Porous materials},\n%keywords = {Viscosity;Shear waves;Air;Viscous flow;Acoustic waves;Acoustics;Stresses;},\n%note = {Acoustical waves;Numerical implementation;Porous medium;Reflection and transmission;Reflection and transmission coefficients;Specific frequencies;Transverse waves;Viscous fluids;},\nURL = {http://dx.doi.org/10.1016/j.ijengsci.2019.103189},\n} \n\n\n
\n
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\n In this paper, the effects of transverse acoustic waves in characterizing a bone-like, porous medium filled with a viscous fluid are analyzed for the first time. Scattering operators along with stress fields are derived by using the standard Biot-JKD model. A short duration acoustical pulse is applied to one side of a bone-like, porous medium so that both longitudinal and transverse waves travel through the intermediate medium which is filled with a viscous fluid. The reflection and transmission operators along with stresses in the medium are expressed in terms of these waves. The numerical implementation is validated for the longitudinal wave by comparison with the numerical simulation performed by Fellah, Chapelon, Berger, Lauriks, and Depollier (2004). The effects of the transverse waves on the reflection and transmission coefficients as well as the stress field are studied by considering different viscosities and porosities. It is shown that when the fluid viscosity in the medium is relatively high (such as bone marrow), the effect of the transverse wave dominates. However, this effect is negligible when the medium is filled with a relatively low viscous fluid (such as air). Furthermore, it is shown that the role of transverse waves in characterizing bone structures and bone loss is imperative since the acoustical response of such media at specific frequencies can be triggered only by considering the effects of transverse waves.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Numerical modelling of oil-sands tailings dam breach runout and overland flow.\n \n \n \n \n\n\n \n Mahdi, A.; Shakibaeinia, A.; and Dibike, Y. B.\n\n\n \n\n\n\n Science of the Total Environment, 703. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194907795855 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical modelling of oil-sands tailings dam breach runout and overland flow},\njournal = {Science of the Total Environment},\nauthor = {Mahdi, Abdellah and Shakibaeinia, Ahmad and Dibike, Yonas B.},\nvolume = {703},\nyear = {2020},\nissn = {00489697},\nabstract = {Tailings dams, used for containing the residue of mining processes, are very important elements of the Alberta oil-sands industry in Canada. Potential breach of any of these dams can have catastrophic impact on the environment, economy and human health and safety. Therefore, understanding the after-breach processes is a crucial step in hazard analysis and response planning. This paper studies the potential consequence of a hypothetical oil-sands tailings dam breach by performing numerical simulations of the runout and non-Newtonian overland flow of tailings, including the resulting flooding condition and subsequent spill to nearby water bodies. A non-Newtonian dam-breach model with a visco-plastic rheological relationship is used for this purpose. The model is first validated using the 2014 Mount Polley tailings dam breach in British Columbia, before its application to investigate the flooding volume, extent, and downstream hydrograph of a hypothetical breach from a selected oil-sands tailings dam. The validation results show that the model is able to reproduce the flooding extent and water level variation (due to breach wave) at a downstream lake. The oil-sands tailings spill simulation study demonstrated the importance of considering the non-Newtonian behaviour of tailings materials as the non-Newtonian approach resulted in twice as long flood travel time and slightly less spill volume to the downstream river (i.e. Lower Athabasca River) as that of a Newtonian fluid (i.e. water). The results are also found to be highly sensitive to the rheological parameters of the tailings materials such as their viscosity and yield stress that need to be determined through proper calibration.<br/> © 2019},\nkey = {Hazardous materials spills},\n%keywords = {Rivers;Sand;Non Newtonian flow;Travel time;Newtonian liquids;Numerical models;Dams;},\n%note = {Impact on the environment;Non-newtonian;Oil sands tailings;Overland flow;Rheological parameter;Rheological relationship;Tailings dam;Water level variations;},\nURL = {http://dx.doi.org/10.1016/j.scitotenv.2019.134568},\n} \n\n\n
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\n Tailings dams, used for containing the residue of mining processes, are very important elements of the Alberta oil-sands industry in Canada. Potential breach of any of these dams can have catastrophic impact on the environment, economy and human health and safety. Therefore, understanding the after-breach processes is a crucial step in hazard analysis and response planning. This paper studies the potential consequence of a hypothetical oil-sands tailings dam breach by performing numerical simulations of the runout and non-Newtonian overland flow of tailings, including the resulting flooding condition and subsequent spill to nearby water bodies. A non-Newtonian dam-breach model with a visco-plastic rheological relationship is used for this purpose. The model is first validated using the 2014 Mount Polley tailings dam breach in British Columbia, before its application to investigate the flooding volume, extent, and downstream hydrograph of a hypothetical breach from a selected oil-sands tailings dam. The validation results show that the model is able to reproduce the flooding extent and water level variation (due to breach wave) at a downstream lake. The oil-sands tailings spill simulation study demonstrated the importance of considering the non-Newtonian behaviour of tailings materials as the non-Newtonian approach resulted in twice as long flood travel time and slightly less spill volume to the downstream river (i.e. Lower Athabasca River) as that of a Newtonian fluid (i.e. water). The results are also found to be highly sensitive to the rheological parameters of the tailings materials such as their viscosity and yield stress that need to be determined through proper calibration.
© 2019\n
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\n \n\n \n \n \n \n \n \n Slenderness-based design criteria to allow for the plastic analysis of tubular beams.\n \n \n \n \n\n\n \n Saloumi, E.; Hayeck, M.; Nseir, J.; and Boissonnade, N.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 167. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"Slenderness-basedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20195007831266 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Slenderness-based design criteria to allow for the plastic analysis of tubular beams},\njournal = {Journal of Constructional Steel Research},\nauthor = {Saloumi, Elsy and Hayeck, Marielle and Nseir, Joanna and Boissonnade, Nicolas},\nvolume = {167},\nyear = {2020},\nissn = {0143974X},\nabstract = {The present paper focuses on the rotational capacity of H.S.S. steel sections; in particular, the influence of local buckling is accounted for by means of a new generalized cross-sectional slenderness parameter, which is used to characterize the cross-sectional rotational capacity, and, by extension, the available deformation capacity. Careful shell modelling of hollow section beams in bending was used, the numerical models being previously carefully validated against more than 50 bending tests. Extensive F.E. studies were consecutively performed, including many parameters such as various material grades, load and support arrangements, length-to-height ratios, etc. Specific attention was paid to the introduction of initial geometrical (local) imperfections, as they were shown quite influential on the rotation capacity. The paper then analyses the numerical results and points out the various influences of height-to-width ratio, shear, moment gradient, yield stress and length-to-height ratio on the available rotational capacity. In a second step, the rotational capacity demand vs. stability criterion is detailed, and related to the proposed generalized cross-sectional slenderness, which is shown to be more appropriate than the b/t ratios usually proposed in design codes. Finally, code-ready recommendations for new ways of allowing for plastic analysis in practical design following the proposed approach are given.<br/> © 2019 Elsevier Ltd},\nkey = {Bending tests},\n%keywords = {Stability criteria;Yield stress;},\n%note = {Deformation capacity;Design criteria;Hollow section beam;Moment gradients;Numerical results;Plastic analysis;Rotation capacity;Rotational capacity;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2019.105788},\n} \n\n\n
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\n The present paper focuses on the rotational capacity of H.S.S. steel sections; in particular, the influence of local buckling is accounted for by means of a new generalized cross-sectional slenderness parameter, which is used to characterize the cross-sectional rotational capacity, and, by extension, the available deformation capacity. Careful shell modelling of hollow section beams in bending was used, the numerical models being previously carefully validated against more than 50 bending tests. Extensive F.E. studies were consecutively performed, including many parameters such as various material grades, load and support arrangements, length-to-height ratios, etc. Specific attention was paid to the introduction of initial geometrical (local) imperfections, as they were shown quite influential on the rotation capacity. The paper then analyses the numerical results and points out the various influences of height-to-width ratio, shear, moment gradient, yield stress and length-to-height ratio on the available rotational capacity. In a second step, the rotational capacity demand vs. stability criterion is detailed, and related to the proposed generalized cross-sectional slenderness, which is shown to be more appropriate than the b/t ratios usually proposed in design codes. Finally, code-ready recommendations for new ways of allowing for plastic analysis in practical design following the proposed approach are given.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Linear Prediction for Leak Detection in Water Distribution Networks.\n \n \n \n \n\n\n \n Cody, R. A.; Dey, P.; and Narasimhan, S.\n\n\n \n\n\n\n Journal of Pipeline Systems Engineering and Practice, 11(1). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"LinearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194407607114 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Linear Prediction for Leak Detection in Water Distribution Networks},\njournal = {Journal of Pipeline Systems Engineering and Practice},\nauthor = {Cody, Roya A. and Dey, Pampa and Narasimhan, Sriram},\nvolume = {11},\nnumber = {1},\nyear = {2020},\nissn = {19491190},\nabstract = {Leaks in water distribution systems can run continuously for extended periods undetected due to their minimal impact on pressure and vibration signals in the overall system. Detecting such leaks from acoustic measurements is challenging because leak-induced changes in acoustic measurements can be masked by strong background noise or usage-induced changes. This paper addressed the problem of leak detection and localization in water distribution pipes through a technique called linear prediction (LP). LP was shown to be effective in capturing the composite spectrum effects of radiation, pipe system, and leak-induced excitation of the pipe system, with and without leaks, and thus has the potential to be an effective tool to detect leaks. The relatively simple mathematical formulation of LP lends itself well to online implementation in long-term monitoring applications and hence motivated an in-depth investigation. A data-driven anomaly detection approach was presented which utilizes the features extracted from the LP coefficients representing the underlying acoustic signals. In terms of leak localization, compared with correlation techniques using raw signals, it was shown that shorter segments of LP reconstructed signals can achieve similar levels of accuracy as those using longer segments of raw time series, which is a key advantage in long-term online implementation applications. A relatively complex experimental test bed was used to generate realistic acoustic data under various hydraulic conditions, including simulated leak and flow cases. Most importantly, due to the simplicity of the technique, this method has significant potential for autonomous leak detection and localization in full-scale monitoring applications.<br/> © 2019 American Society of Civil Engineers.},\nkey = {Leak detection},\n%keywords = {Radiation effects;Acoustic emission testing;Water distribution systems;Acoustic waves;Anomaly detection;},\n%note = {Correlation techniques;Data-driven anomalies;Detection and localization;Mathematical formulation;Monitoring applications;Online implementation;Water distribution networks;Water distribution pipes;},\nURL = {http://dx.doi.org/10.1061/(ASCE)PS.1949-1204.0000415},\n} \n\n\n
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\n Leaks in water distribution systems can run continuously for extended periods undetected due to their minimal impact on pressure and vibration signals in the overall system. Detecting such leaks from acoustic measurements is challenging because leak-induced changes in acoustic measurements can be masked by strong background noise or usage-induced changes. This paper addressed the problem of leak detection and localization in water distribution pipes through a technique called linear prediction (LP). LP was shown to be effective in capturing the composite spectrum effects of radiation, pipe system, and leak-induced excitation of the pipe system, with and without leaks, and thus has the potential to be an effective tool to detect leaks. The relatively simple mathematical formulation of LP lends itself well to online implementation in long-term monitoring applications and hence motivated an in-depth investigation. A data-driven anomaly detection approach was presented which utilizes the features extracted from the LP coefficients representing the underlying acoustic signals. In terms of leak localization, compared with correlation techniques using raw signals, it was shown that shorter segments of LP reconstructed signals can achieve similar levels of accuracy as those using longer segments of raw time series, which is a key advantage in long-term online implementation applications. A relatively complex experimental test bed was used to generate realistic acoustic data under various hydraulic conditions, including simulated leak and flow cases. Most importantly, due to the simplicity of the technique, this method has significant potential for autonomous leak detection and localization in full-scale monitoring applications.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Condition assessment of an ASR-affected overpass after nearly 50 years in service.\n \n \n \n \n\n\n \n Sanchez, L.; Fournier, B.; Mitchell, D.; and Bastien, J.\n\n\n \n\n\n\n Construction and Building Materials, 236. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ConditionPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194707726521 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Condition assessment of an ASR-affected overpass after nearly 50 years in service},\njournal = {Construction and Building Materials},\nauthor = {Sanchez, L.F.M. and Fournier, B. and Mitchell, D. and Bastien, J.},\nvolume = {236},\nyear = {2020},\nissn = {09500618},\nabstract = {RBC overpass was a highway bridge structure that was built using an alkali-silica reactive aggregate. Over nearly 5 decades, many signs of distress were developed on the various RBC structural members mainly due to alkali-silica reaction (ASR). In 2010/2011, RBC overpass was demolished and thus a number of cores from the various structural members were extracted, which enabled the condition assessment of the structure through a comprehensive multi-level protocol. This paper presents the outcomes obtained from the overall evaluation of RBC members. Results show that the damage degree of the distinct members vary according to the member's type and condition. Very high, high and moderate damage levels were found for the foundation blocks, bridge deck and columns of the structure, which indicates that RBC overpass was not in accordance with Canadian safety protocols by the time of its demolition and raises concerns regarding the structural implications of ASR-affected infrastructure.<br/> © 2019 Elsevier Ltd},\nkey = {Silica},\n%keywords = {Damage detection;Overpasses;},\n%note = {Alkali-silica reaction;Bridge structures;Condition assessments;Damage rating index;Damage tests;Foundation blocks;Reactive aggregate;Safety protocols;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2019.117554},\n} \n\n\n
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\n RBC overpass was a highway bridge structure that was built using an alkali-silica reactive aggregate. Over nearly 5 decades, many signs of distress were developed on the various RBC structural members mainly due to alkali-silica reaction (ASR). In 2010/2011, RBC overpass was demolished and thus a number of cores from the various structural members were extracted, which enabled the condition assessment of the structure through a comprehensive multi-level protocol. This paper presents the outcomes obtained from the overall evaluation of RBC members. Results show that the damage degree of the distinct members vary according to the member's type and condition. Very high, high and moderate damage levels were found for the foundation blocks, bridge deck and columns of the structure, which indicates that RBC overpass was not in accordance with Canadian safety protocols by the time of its demolition and raises concerns regarding the structural implications of ASR-affected infrastructure.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Impact of temporal variations in vegetation optical depth and vegetation temperature on L-band passive soil moisture retrievals over a tropical forest using in-situ information.\n \n \n \n \n\n\n \n Monsivais-Huertero, A.; Hernandez-Sanchez, J. C.; Jimenez-Escalona, J. C.; Galeana-Pizana, J. M.; Constantino-Recillas, D. E.; Torres-Gomez, A. C.; Magagi, R.; Goita, K.; and Couturier, S.\n\n\n \n\n\n\n International Journal of Remote Sensing, 41(6): 2098 - 2139. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ImpactPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194607687545 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impact of temporal variations in vegetation optical depth and vegetation temperature on L-band passive soil moisture retrievals over a tropical forest using in-situ information},\njournal = {International Journal of Remote Sensing},\nauthor = {Monsivais-Huertero, Alejandro and Hernandez-Sanchez, Juan Carlos and Jimenez-Escalona, Jose Carlos and Galeana-Pizana, Jose Mauricio and Constantino-Recillas, Daniel Enrique and Torres-Gomez, Aura Citlalli and Magagi, Ramata and Goita, Kalifa and Couturier, Stephane},\nvolume = {41},\nnumber = {6},\nyear = {2020},\npages = {2098 - 2139},\nissn = {01431161},\nabstract = {The Soil Moisture and Ocean Salinity (SMOS) and Soil Moisture Active Passive (SMAP) missions provide estimates of soil moisture (SM) at similar spatial resolutions using L-band brightness temperatures (T<inf>B</inf>). These missions meet the requirement of SM retrievals with an unbiased root-mean-square difference (ubRMSD) < 0.04 (m<sup>3</sup> m<sup>−3</sup>) compared to in-situ measurements over most of the ecosystems; however, their SM estimates over forests present an ubRMSD > 0.10 (m<sup>3</sup> m<sup>−3</sup>). In this paper, we compared the SM retrievals from the SMOS and SMAP SM products with in-situ SM over a tropical forest in Southern Mexico. The L-band passive SM retrievals were evaluated in terms of four statistical metrics: root-mean-square difference (RMSD), bias, ubRMSD, and correlation coefficient (r). In-situ measurements of SM, soil and vegetation temperatures, precipitation, soil surface roughness, tree heights, diameters at the breast height of trunks, and forest cover fraction were collected during a field campaign from 6 January to 14 June 2015 in the Biosphere Reserve of Calakmul, Mexico, covering two areas of about 40 km × 40 km each. The comparison between SM retrievals from SMOS and SMAP and in-situ SM showed an RMSD ranging from 0.107 to 0.322 (m<sup>3</sup> m<sup>−3</sup>) and an ubRMSD from 0.049 to 0.128 (m<sup>3</sup> m<sup>−3</sup>). Overall, the SMAP SM estimates showed higher values of r and were closer to in-situ SM. Because the SMAP and SMOS radiometers performed very similar, these differences are due to the values assigned to the vegetation optical depth (τ), the scattering albedo (ω), and the representation of the dynamics in vegetation and soil temperatures in the SMOS and SMAP retrieval algorithm. Based on an optimization process, we estimated simultaneously optimal ω and τ values for the tropical forest by using T<inf>B</inf> observations from SMAP and SMOS radiometers. The optimal value of ω was 0.0655 for the tropical forest, and constant over the study period. In contrast, the optimal values of τ showed to be variant on time and ranging between 1.0 and 1.7, with an averaged value of 1.4 and a standard deviation of 0.24. When applying the optimal values of ω and τ and in-situ soil and vegetation temperatures, the SM retrievals showed an ubRMSD of 0.035–0.070 (m<sup>3</sup> m<sup>−3</sup>), improving the SM retrievals about 45%. A sensitivity analysis was conducted to evaluate the effect of the uncertainties in τ,ω, and soil and vegetation temperatures on the estimates of T<inf>B</inf>. It was found that vegetation temperature (T<inf>veg</inf>) was the most sensitive parameter, with r higher than 0.70 for both polarizations in T<inf>B</inf>. When comparing in-situ T<inf>veg</inf> and surface temperature values used in the SMAP and SMOS SM retrieval algorithms, differences up to 10 K were observed, affecting the SM estimates. The results presented in this paper could be useful in the preparation of the SMAP Calibration/Validation Experiment 2019, aiming at improving SM retrievals over forests.<br/> © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Soil moisture},\n%keywords = {Optical properties;Radiometers;Tropics;Optimal systems;Surface roughness;Temperature;Vegetation;Mean square error;Forestry;},\n%note = {Brightness temperatures;Calibration/validation;Correlation coefficient;Root mean square differences;Soil moisture active passive (SMAP);Soil Moisture and Ocean Salinity (SMOS);Soil moisture retrievals;Vegetation optical depth;},\nURL = {http://dx.doi.org/10.1080/01431161.2019.1685715},\n} \n\n\n
\n
\n\n\n
\n The Soil Moisture and Ocean Salinity (SMOS) and Soil Moisture Active Passive (SMAP) missions provide estimates of soil moisture (SM) at similar spatial resolutions using L-band brightness temperatures (TB). These missions meet the requirement of SM retrievals with an unbiased root-mean-square difference (ubRMSD) < 0.04 (m3 m−3) compared to in-situ measurements over most of the ecosystems; however, their SM estimates over forests present an ubRMSD > 0.10 (m3 m−3). In this paper, we compared the SM retrievals from the SMOS and SMAP SM products with in-situ SM over a tropical forest in Southern Mexico. The L-band passive SM retrievals were evaluated in terms of four statistical metrics: root-mean-square difference (RMSD), bias, ubRMSD, and correlation coefficient (r). In-situ measurements of SM, soil and vegetation temperatures, precipitation, soil surface roughness, tree heights, diameters at the breast height of trunks, and forest cover fraction were collected during a field campaign from 6 January to 14 June 2015 in the Biosphere Reserve of Calakmul, Mexico, covering two areas of about 40 km × 40 km each. The comparison between SM retrievals from SMOS and SMAP and in-situ SM showed an RMSD ranging from 0.107 to 0.322 (m3 m−3) and an ubRMSD from 0.049 to 0.128 (m3 m−3). Overall, the SMAP SM estimates showed higher values of r and were closer to in-situ SM. Because the SMAP and SMOS radiometers performed very similar, these differences are due to the values assigned to the vegetation optical depth (τ), the scattering albedo (ω), and the representation of the dynamics in vegetation and soil temperatures in the SMOS and SMAP retrieval algorithm. Based on an optimization process, we estimated simultaneously optimal ω and τ values for the tropical forest by using TB observations from SMAP and SMOS radiometers. The optimal value of ω was 0.0655 for the tropical forest, and constant over the study period. In contrast, the optimal values of τ showed to be variant on time and ranging between 1.0 and 1.7, with an averaged value of 1.4 and a standard deviation of 0.24. When applying the optimal values of ω and τ and in-situ soil and vegetation temperatures, the SM retrievals showed an ubRMSD of 0.035–0.070 (m3 m−3), improving the SM retrievals about 45%. A sensitivity analysis was conducted to evaluate the effect of the uncertainties in τ,ω, and soil and vegetation temperatures on the estimates of TB. It was found that vegetation temperature (Tveg) was the most sensitive parameter, with r higher than 0.70 for both polarizations in TB. When comparing in-situ Tveg and surface temperature values used in the SMAP and SMOS SM retrieval algorithms, differences up to 10 K were observed, affecting the SM estimates. The results presented in this paper could be useful in the preparation of the SMAP Calibration/Validation Experiment 2019, aiming at improving SM retrievals over forests.
© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n Institutional inertia: challenges in urban water management on the path towards a water-sensitive Surabaya, Indonesia.\n \n \n \n \n\n\n \n Kosters, M.; Bichai, F.; and Schwartz, K.\n\n\n \n\n\n\n International Journal of Water Resources Development, 36(1): 50 - 68. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"InstitutionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194507642337 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Institutional inertia: challenges in urban water management on the path towards a water-sensitive Surabaya, Indonesia},\njournal = {International Journal of Water Resources Development},\nauthor = {Kosters, M. and Bichai, F. and Schwartz, K.},\nvolume = {36},\nnumber = {1},\nyear = {2020},\npages = {50 - 68},\nissn = {07900627},\nabstract = {Traditional approaches to urban water management are increasingly questioned. To understand whether the alternative water-sensitive city (WSC) paradigm is applicable in Surabaya, Indonesia, its water governance system was analyzed using semi-structured interviews with relevant stakeholders, questionnaires, and a literature review. Three main institutional obstacles to a transition towards a WSC were identified: national and local political interference; lack of institutional coordination; and the commercialization of Surabaya’s water utility. A discord between water practitioners’ individual beliefs and water management practices also makes changes towards a WSC difficult. Yet, opportunities are found where existing political goals align with elements of the WSC.<br/> © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Water management},\n%keywords = {Surveys;},\n%note = {institutional challenges;modern infrastructural ideal;Surabaya;Urban water management;Water governance;Water-sensitive cities;},\nURL = {http://dx.doi.org/10.1080/07900627.2019.1662378},\n} \n\n\n
\n
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\n Traditional approaches to urban water management are increasingly questioned. To understand whether the alternative water-sensitive city (WSC) paradigm is applicable in Surabaya, Indonesia, its water governance system was analyzed using semi-structured interviews with relevant stakeholders, questionnaires, and a literature review. Three main institutional obstacles to a transition towards a WSC were identified: national and local political interference; lack of institutional coordination; and the commercialization of Surabaya’s water utility. A discord between water practitioners’ individual beliefs and water management practices also makes changes towards a WSC difficult. Yet, opportunities are found where existing political goals align with elements of the WSC.
© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n \n Non-intrusive Characterization of Shallow Soils and Utility Structures Below Pavements Using Rayleigh Waves.\n \n \n \n \n\n\n \n Tremblay, S.; Mhenni, A.; Karray, M.; Paquet-Bouchard, B.; Chekired, M.; Bessette, C.; and Jinga, L.\n\n\n \n\n\n\n Pure and Applied Geophysics, 177(2): 737 - 762. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"Non-intrusivePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194507624435 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Non-intrusive Characterization of Shallow Soils and Utility Structures Below Pavements Using Rayleigh Waves},\njournal = {Pure and Applied Geophysics},\nauthor = {Tremblay, Simon-Pierre and Mhenni, Ahmed and Karray, Mourad and Paquet-Bouchard, Bruno and Chekired, Mohamed and Bessette, Carole and Jinga, Livius},\nvolume = {177},\nnumber = {2},\nyear = {2020},\npages = {737 - 762},\nissn = {00334553},\nabstract = {When surface waves are used to characterize soils under a pavement, their presence causes problems during the analysis of the signals due mainly to the presence of Lamb waves and higher Rayleigh-wave modes in the signals. Recent studies have shown that these problems can be mitigated if the seismic source is placed on the surface of the soil while leaving the receivers on the pavement. However, the presence of a pavement at the surface of the soil does influence the propagation of Rayleigh waves even if it does not prevent its characterization. We show how we utilized the generalized S transform and the multi-modal analysis of surface waves to identify and separate the different Rayleigh-wave modes. Using 3D numerical models and experimental models, we show that the thickness of the pavement affects the energy distribution of the different Rayleigh-wave modes and that increasing the pavement thickness increases the chances of mode misidentification problems since the energy of the waves tend to travel on higher modes. We also demonstrate that for an underground profile of a given depth, the thickness of the soil layer has more importance than the thickness of the pavement on the Rayleigh-wave propagation energy and velocity. The influence of the pavement on the group and phase velocities of the fundamental Rayleigh-wave propagation mode is also shown to depend on their frequency (wavelength). We present two case studies at the end of the manuscript to confirm the conclusions established based on numerical and experimental models.<br/> © 2019, Springer Nature Switzerland AG.},\nkey = {Nondestructive examination},\n%keywords = {Rayleigh waves;Wave propagation;Soil testing;Mathematical transformations;Pavements;Soils;Modal analysis;Signal analysis;},\n%note = {3-d numerical models;Energy distributions;Experimental models;Generalized S transform;Higher mode;Non destructive testing;non-normally dispersive profiles;Pavement thickness;},\nURL = {http://dx.doi.org/10.1007/s00024-019-02333-x},\n} \n\n\n
\n
\n\n\n
\n When surface waves are used to characterize soils under a pavement, their presence causes problems during the analysis of the signals due mainly to the presence of Lamb waves and higher Rayleigh-wave modes in the signals. Recent studies have shown that these problems can be mitigated if the seismic source is placed on the surface of the soil while leaving the receivers on the pavement. However, the presence of a pavement at the surface of the soil does influence the propagation of Rayleigh waves even if it does not prevent its characterization. We show how we utilized the generalized S transform and the multi-modal analysis of surface waves to identify and separate the different Rayleigh-wave modes. Using 3D numerical models and experimental models, we show that the thickness of the pavement affects the energy distribution of the different Rayleigh-wave modes and that increasing the pavement thickness increases the chances of mode misidentification problems since the energy of the waves tend to travel on higher modes. We also demonstrate that for an underground profile of a given depth, the thickness of the soil layer has more importance than the thickness of the pavement on the Rayleigh-wave propagation energy and velocity. The influence of the pavement on the group and phase velocities of the fundamental Rayleigh-wave propagation mode is also shown to depend on their frequency (wavelength). We present two case studies at the end of the manuscript to confirm the conclusions established based on numerical and experimental models.
© 2019, Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n \n How has LCA been applied to 3D printing? A systematic literature review and recommendations for future studies.\n \n \n \n \n\n\n \n Saade, M. R. M.; Yahia, A.; and Amor, B.\n\n\n \n\n\n\n Journal of Cleaner Production, 244. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"HowPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194207543383 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {How has LCA been applied to 3D printing? A systematic literature review and recommendations for future studies},\njournal = {Journal of Cleaner Production},\nauthor = {Saade, Marcella Ruschi Mendes and Yahia, Ammar and Amor, Ben},\nvolume = {244},\nyear = {2020},\nissn = {09596526},\nabstract = {Previously perceived as a rapid prototyping technique, additive manufacturing (AM) has evolved into a fully developed manufacturing process, with growing accessibility to different industrial sectors. Its technological and economic advantages are frequently documented, but AM's environmental performance is seldom investigated. Not long ago discrete initiatives to assess AM's applicability for building large-scale structures started to arise. Mostly focused on technical and economic feasibility, these studies pave the way for the process's consolidation in the construction sector. This paper aims to systematically and critically assess the available literature on AM's life cycle environmental impacts and to identify the main challenges and trends on loads measurements. The findings help feed recommendations to perform life cycle assessments (LCA) in AM initiatives, with a special focus on the construction sector. A systematic search led to the careful analysis of 52 papers, out of 353 that matched our search protocol. In terms of LCA methods’ robustness, a lack of transparency stood out in many papers, suggesting that authors were most likely non-LCA experts, applying the tool without much knowledge of requirements and modelling intricacies. In terms of documented global warming potential (GWP) values in comparison to conventional manufacturing (CM), AM processes were portrayed as beneficial in most cases. Most papers documented results ranges, which represented different printing, production or distribution strategies, in which AM's performance varied considerably. LCA played a significant role in finding an optimum production approach and seems to be a valuable lens to assure 3D printing's environmental competitiveness. A contribution analysis showed that there is a shift between materials vs. production processes contribution in the life cycle GWP loads of systems manufactured with AM and CM. 3D printing processes account for almost 80% of AM's total GWP, while for CM that position is held by the material-related loads. For construction related AM processes, the material intensity is, however, still by far the largest contributor to building systems’ GWP, maintaining the impact distribution as in typical manufacturing processes.<br/> © 2019 Elsevier Ltd},\nkey = {3D printers},\n%keywords = {Environmental management;Construction industry;Additives;Environmental impact;Global warming;Life cycle;},\n%note = {3-D printing;Conventional manufacturing;Distribution strategies;Environmental performance;Global warming potential;Life Cycle Assessment (LCA);Life-cycle environmental impact;Systematic literature review;},\nURL = {http://dx.doi.org/10.1016/j.jclepro.2019.118803},\n} \n\n\n
\n
\n\n\n
\n Previously perceived as a rapid prototyping technique, additive manufacturing (AM) has evolved into a fully developed manufacturing process, with growing accessibility to different industrial sectors. Its technological and economic advantages are frequently documented, but AM's environmental performance is seldom investigated. Not long ago discrete initiatives to assess AM's applicability for building large-scale structures started to arise. Mostly focused on technical and economic feasibility, these studies pave the way for the process's consolidation in the construction sector. This paper aims to systematically and critically assess the available literature on AM's life cycle environmental impacts and to identify the main challenges and trends on loads measurements. The findings help feed recommendations to perform life cycle assessments (LCA) in AM initiatives, with a special focus on the construction sector. A systematic search led to the careful analysis of 52 papers, out of 353 that matched our search protocol. In terms of LCA methods’ robustness, a lack of transparency stood out in many papers, suggesting that authors were most likely non-LCA experts, applying the tool without much knowledge of requirements and modelling intricacies. In terms of documented global warming potential (GWP) values in comparison to conventional manufacturing (CM), AM processes were portrayed as beneficial in most cases. Most papers documented results ranges, which represented different printing, production or distribution strategies, in which AM's performance varied considerably. LCA played a significant role in finding an optimum production approach and seems to be a valuable lens to assure 3D printing's environmental competitiveness. A contribution analysis showed that there is a shift between materials vs. production processes contribution in the life cycle GWP loads of systems manufactured with AM and CM. 3D printing processes account for almost 80% of AM's total GWP, while for CM that position is held by the material-related loads. For construction related AM processes, the material intensity is, however, still by far the largest contributor to building systems’ GWP, maintaining the impact distribution as in typical manufacturing processes.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Identifying At-Risk Non-Structural Elements in Buildings Using BIM: A Case Study Application.\n \n \n \n \n\n\n \n Valinejadshoubi, M.; Bagchi, A.; and Moselhi, O.\n\n\n \n\n\n\n Journal of Earthquake Engineering, 24(5): 869 - 880. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"IdentifyingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20182105232601 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Identifying At-Risk Non-Structural Elements in Buildings Using BIM: A Case Study Application},\njournal = {Journal of Earthquake Engineering},\nauthor = {Valinejadshoubi, Mojtaba and Bagchi, Ashutosh and Moselhi, Osama},\nvolume = {24},\nnumber = {5},\nyear = {2020},\npages = {869 - 880},\nissn = {13632469},\nabstract = {The non-structural elements (NSE) of a building could be hazardous in the event of an earthquake. Hence, a seismic risk assessment is critical for identifying hazardous elements. This paper proposes a method for visualizing a building’s NSEs to assess their seismic risks using Building Information Modeling (BIM) to visualize and automatically mapping risk factors. The relevant Canadian and American standards were used to calculate the level of risk associated with each NSE for a typical six-story residential building.<br/> © 2018, © 2018 Taylor & Francis Group, LLC.},\nkey = {Risk assessment},\n%keywords = {Seismology;Hazards;Information theory;Seismic design;Architectural design;},\n%note = {American standard;Building Information Model - BIM;Functional components;Hazardous elements;Non-structural elements;Residential building;Risk factors;Seismic risk assessment;},\nURL = {http://dx.doi.org/10.1080/13632469.2018.1453407},\n} \n\n\n
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\n The non-structural elements (NSE) of a building could be hazardous in the event of an earthquake. Hence, a seismic risk assessment is critical for identifying hazardous elements. This paper proposes a method for visualizing a building’s NSEs to assess their seismic risks using Building Information Modeling (BIM) to visualize and automatically mapping risk factors. The relevant Canadian and American standards were used to calculate the level of risk associated with each NSE for a typical six-story residential building.
© 2018, © 2018 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n Quantification of the Impact of Detailing on the Performance and Cost of RC Shear Wall Buildings in Regions with High Uncertainty in Seismicity Hazards.\n \n \n \n \n\n\n \n Aly, N.; AlHamaydeh, M.; and Galal, K.\n\n\n \n\n\n\n Journal of Earthquake Engineering, 24(3): 421 - 446. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"QuantificationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20181404970124 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Quantification of the Impact of Detailing on the Performance and Cost of RC Shear Wall Buildings in Regions with High Uncertainty in Seismicity Hazards},\njournal = {Journal of Earthquake Engineering},\nauthor = {Aly, Nader and AlHamaydeh, Mohammad and Galal, Khaled},\nvolume = {24},\nnumber = {3},\nyear = {2020},\npages = {421 - 446},\nissn = {13632469},\nabstract = {This paper aims to quantify the impact of lateral force resisting system detailing on the performance and cost of RC shear wall buildings in regions with high uncertainty in seismicity. Six archetype buildings are designed and detailed as per the IBC’12. The results showed lower collapse margin ratios for the ordinary detailing, which indicates poorer performance as suggested by engineering intuition. Furthermore, it is demonstrated that opting to utilize special RC shear walls substantially improves the structural response. The marginal initial cost increase associated with special detailing is considerably outweighed by the resulting savings in the repair and downtime costs.<br/> © 2018, © 2018 Taylor & Francis Group, LLC.},\nkey = {Shear walls},\n%keywords = {Cost benefit analysis;Uncertainty analysis;Earthquakes;},\n%note = {Earthquake damages;FEMA P695;Fragility analysis;Seismic Performance;Seismicity Uncertainty;},\nURL = {http://dx.doi.org/10.1080/13632469.2018.1453406},\n} \n\n\n\n
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\n This paper aims to quantify the impact of lateral force resisting system detailing on the performance and cost of RC shear wall buildings in regions with high uncertainty in seismicity. Six archetype buildings are designed and detailed as per the IBC’12. The results showed lower collapse margin ratios for the ordinary detailing, which indicates poorer performance as suggested by engineering intuition. Furthermore, it is demonstrated that opting to utilize special RC shear walls substantially improves the structural response. The marginal initial cost increase associated with special detailing is considerably outweighed by the resulting savings in the repair and downtime costs.
© 2018, © 2018 Taylor & Francis Group, LLC.\n
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\n \n\n \n \n \n \n \n \n Effect of nonstructural components on the dynamic characteristics of light-frame wood buildings.\n \n \n \n \n\n\n \n Hafeez, G.; Doudak, G.; and McClure, G.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 47(3): 257 - 271. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"EffectPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20200908233517 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of nonstructural components on the dynamic characteristics of light-frame wood buildings},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Hafeez, Ghazanfarah and Doudak, Ghasan and McClure, Ghyslaine},\nvolume = {47},\nnumber = {3},\nyear = {2020},\npages = {257 - 271},\nissn = {03151468},\nabstract = {This research deals with ambient vibration measurements (AVM) in 16 multi-storey light-frame wood buildings with wood-based shear walls as the main lateral load resisting system. Its primary objective is to evaluate the effect of nonstructural sheathing panels and the connectivity between firewall-separated buildings, on the modal properties of the tested buildings. Lower natural frequencies, corresponding mode shapes and equivalent structural damping were extracted from the AVM records. The study confirmed that the increase in stiffness of the finished buildings was dominant over their increase in mass when sway mode periods of finished buildings and bare structural frameworks are compared. The stiffening effect of gypsum wallboard was deemed significant and should be accounted for in seismic design. The study also indicates that even when the building section were only nominally connected to the firewall, composite action in the lateral response was taking place.<br/> © 2020, Canadian Science Publishing. All rights reserved.},\nkey = {Stiffness},\n%keywords = {Wooden buildings;Seismic design;Walls (structural partitions);Timber;},\n%note = {Dynamic characteristics;Fundamental building period;Lateral drifts;Lateral load resisting systems;Light frames;Non-structural components;Structural frameworks;Timber structures;},\nURL = {http://dx.doi.org/10.1139/cjce-2018-0642},\n} \n\n\n
\n
\n\n\n
\n This research deals with ambient vibration measurements (AVM) in 16 multi-storey light-frame wood buildings with wood-based shear walls as the main lateral load resisting system. Its primary objective is to evaluate the effect of nonstructural sheathing panels and the connectivity between firewall-separated buildings, on the modal properties of the tested buildings. Lower natural frequencies, corresponding mode shapes and equivalent structural damping were extracted from the AVM records. The study confirmed that the increase in stiffness of the finished buildings was dominant over their increase in mass when sway mode periods of finished buildings and bare structural frameworks are compared. The stiffening effect of gypsum wallboard was deemed significant and should be accounted for in seismic design. The study also indicates that even when the building section were only nominally connected to the firewall, composite action in the lateral response was taking place.
© 2020, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n 10 Years of Anode Research and Development: Alcoa and Université Laval Experience.\n \n \n \n \n\n\n \n Tessier, J.; Lauzon-Gauthier, J.; Fafard, M.; Alamdari, H.; Duchesne, C.; and Gosselin, L.\n\n\n \n\n\n\n In pages 1161 - 1162, San Diego, CA, United states, 2020. \n \n\n\n\n
\n\n\n\n \n \n \"10 YearsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20200808204749 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {10 Years of Anode Research and Development: Alcoa and Université Laval Experience},\njournal = {Minerals, Metals and Materials Series},\nauthor = {Tessier, Jayson and Lauzon-Gauthier, Julien and Fafard, Mario and Alamdari, Houshang and Duchesne, Carl and Gosselin, Louis},\nyear = {2020},\npages = {1161 - 1162},\nissn = {23671181},\naddress = {San Diego, CA, United states},\nabstract = {In 2009, Alcoa started an extensive research and development program with several professors from Université Laval in Quebec City. The program, mainly oriented into advanced modeling, carbon materials and advanced statistics, was aimed at improving our R&D capability by enhancing our core technical expertise. Universities offer a diverse in-depth fundamental expertise that is not necessarily available in-house, where industrial researchers are oftentimes more oriented into applied research. Universities also provide hi-tech specialized laboratory equipment not available within typical industry laboratories. After 10 years collaboration between Alcoa and Université Laval, about 60 students have graduated with a M.Sc. or a Ph.D. degree. The following summarizes different results obtained throughout this fruitful journey as well as key learnings on developing and maintaining the relationship between University and Industry partner.<br/> © The Minerals, Metals & Materials Society 2020.},\nkey = {Nondestructive examination},\n%keywords = {Laboratories;Anodes;Carbon;Industrial research;},\n%note = {Carbon anodes;Laboratory equipments;Non destructive testing;Ramming pastes;Research and development;Research and development programs;Technical expertise;University;},\nURL = {http://dx.doi.org/10.1007/978-3-030-36408-3_156},\n} \n\n\n
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\n In 2009, Alcoa started an extensive research and development program with several professors from Université Laval in Quebec City. The program, mainly oriented into advanced modeling, carbon materials and advanced statistics, was aimed at improving our R&D capability by enhancing our core technical expertise. Universities offer a diverse in-depth fundamental expertise that is not necessarily available in-house, where industrial researchers are oftentimes more oriented into applied research. Universities also provide hi-tech specialized laboratory equipment not available within typical industry laboratories. After 10 years collaboration between Alcoa and Université Laval, about 60 students have graduated with a M.Sc. or a Ph.D. degree. The following summarizes different results obtained throughout this fruitful journey as well as key learnings on developing and maintaining the relationship between University and Industry partner.
© The Minerals, Metals & Materials Society 2020.\n
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\n \n\n \n \n \n \n \n \n Does long-term storage of clay samples influence their mechanical characteristics?.\n \n \n \n \n\n\n \n Abdellaziz, M.; Hussien, M. N.; Chekired, M.; and Karray, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 57(2): 304 - 309. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"DoesPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20200508108408 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Does long-term storage of clay samples influence their mechanical characteristics?},\njournal = {Canadian Geotechnical Journal},\nauthor = {Abdellaziz, Mustapha and Hussien, Mahmoud N. and Chekired, Mohamed and Karray, Mourad},\nvolume = {57},\nnumber = {2},\nyear = {2020},\npages = {304 - 309},\nissn = {00083674},\nabstract = {The prime objective of this study is to assess the influence of long-term storage on the physical and mechanical characteristics of clay samples. Samples from two different clays were sealed and stored in a temperature-and humidity-controlled room at the geotechnical laboratory of the Université de Sherbrooke for up to 27 years. The stored clay samples were tested before and after long-term storage and the results compared in this %note. The comparison showed that even with long-term storage, the majority of the physical and mechanical characteristics of the samples were preserved.<br/> © 2020, Canadian Science Publishing. All rights reserved.},\nURL = {http://dx.doi.org/10.1139/cgj-2018-0304},\n} \n\n\n
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\n The prime objective of this study is to assess the influence of long-term storage on the physical and mechanical characteristics of clay samples. Samples from two different clays were sealed and stored in a temperature-and humidity-controlled room at the geotechnical laboratory of the Université de Sherbrooke for up to 27 years. The stored clay samples were tested before and after long-term storage and the results compared in this %note. The comparison showed that even with long-term storage, the majority of the physical and mechanical characteristics of the samples were preserved.
© 2020, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Analysing the contribution of snow water equivalent to the terrestrial water storage over Canada.\n \n \n \n \n\n\n \n Bahrami, A.; Goita, K.; and Magagi, R.\n\n\n \n\n\n\n Hydrological Processes, 34(2): 175 - 188. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"AnalysingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20195007816930 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Analysing the contribution of snow water equivalent to the terrestrial water storage over Canada},\njournal = {Hydrological Processes},\nauthor = {Bahrami, Ala and Goita, Kalifa and Magagi, Ramata},\nvolume = {34},\nnumber = {2},\nyear = {2020},\npages = {175 - 188},\nissn = {08856087},\nabstract = {In this study, the spatial and temporal variabilities of terrestrial water storage anomaly (TWSA) and snow water equivalent anomaly (SWEA) information obtained from the Gravity Recovery and Climate Experiment (GRACE) twin satellites data were analysed in conjunction with multisource snow products over several basins in the Canadian landmass. Snow water equivalent (SWE) data were extracted from three different sources: Global Snow Monitoring for Climate Research version 2 (GlobSnow2), Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E), and Canadian Meteorological Centre (CMC). The objective of the study was to understand whether SWE variations have a significant contribution to terrestrial water storage anomalies in the Canadian landmass. The period was considered from December 2002 to March 2011. Significant relationships were observed between TWSA and SWEA for most of the 15 basins considered (53% to 80% of the basins, depending on the SWE products considered). The best results were obtained with the CMC SWE products compared with satellite-based SWE data. Stronger relationships were found in snow-dominated basins (R<inf>s</inf> > = 0.7), such as the Liard [root mean square error (RMSE) = 21.4 mm] and Peace Basins (RMSE = 26.76 mm). However, despite high snow accumulation in the north of Quebec, GRACE showed weak or insignificant correlations with SWEA, regardless of the data sources. The same behaviour was observed in the Western Hudson Bay basin. In both regions, it was found that the contribution of non-SWE compartments including wetland, surface water, as well as soil water storages has a significant impact on the variations of total storage. These components were estimated using the Water-Global Assessment and Prognosis Global Hydrology Model (WGHM) simulations and then subtracted from GRACE observations. The GRACE-derived SWEA correlation results showed improved relationships with three SWEA products. The improvement is particularly important in the sub-basins of the Hudson Bay, where very weak and insignificant results were previously found with GRACE TWSA data. GRACE-derived SWEA showed a significant relationship with CMC data in 93% of the basins (13% more than GRACE TWSA). Overall, the results indicated the important role of SWE on terrestrial water storage variations.<br/> © 2019 John Wiley & Sons, Ltd.},\nkey = {Snow},\n%keywords = {Geodetic satellites;Surface waters;Digital storage;Mean square error;Earth (planet);Soil moisture;},\n%note = {CMC SWE data;GlobSnow2;GRACE;Snow water equivalent;Terrestrial water storage;WGHM;},\nURL = {http://dx.doi.org/10.1002/hyp.13625},\n} \n\n\n
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\n In this study, the spatial and temporal variabilities of terrestrial water storage anomaly (TWSA) and snow water equivalent anomaly (SWEA) information obtained from the Gravity Recovery and Climate Experiment (GRACE) twin satellites data were analysed in conjunction with multisource snow products over several basins in the Canadian landmass. Snow water equivalent (SWE) data were extracted from three different sources: Global Snow Monitoring for Climate Research version 2 (GlobSnow2), Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E), and Canadian Meteorological Centre (CMC). The objective of the study was to understand whether SWE variations have a significant contribution to terrestrial water storage anomalies in the Canadian landmass. The period was considered from December 2002 to March 2011. Significant relationships were observed between TWSA and SWEA for most of the 15 basins considered (53% to 80% of the basins, depending on the SWE products considered). The best results were obtained with the CMC SWE products compared with satellite-based SWE data. Stronger relationships were found in snow-dominated basins (Rs > = 0.7), such as the Liard [root mean square error (RMSE) = 21.4 mm] and Peace Basins (RMSE = 26.76 mm). However, despite high snow accumulation in the north of Quebec, GRACE showed weak or insignificant correlations with SWEA, regardless of the data sources. The same behaviour was observed in the Western Hudson Bay basin. In both regions, it was found that the contribution of non-SWE compartments including wetland, surface water, as well as soil water storages has a significant impact on the variations of total storage. These components were estimated using the Water-Global Assessment and Prognosis Global Hydrology Model (WGHM) simulations and then subtracted from GRACE observations. The GRACE-derived SWEA correlation results showed improved relationships with three SWEA products. The improvement is particularly important in the sub-basins of the Hudson Bay, where very weak and insignificant results were previously found with GRACE TWSA data. GRACE-derived SWEA showed a significant relationship with CMC data in 93% of the basins (13% more than GRACE TWSA). Overall, the results indicated the important role of SWE on terrestrial water storage variations.
© 2019 John Wiley & Sons, Ltd.\n
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\n \n\n \n \n \n \n \n \n Hydrological monitoring of high-latitude shallow water bodies from high-resolution space-borne D-InSAR.\n \n \n \n \n\n\n \n Siles, G.; Trudel, M.; Peters, D. L.; and Leconte, R.\n\n\n \n\n\n\n Remote Sensing of Environment, 236. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"HydrologicalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194707730605 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Hydrological monitoring of high-latitude shallow water bodies from high-resolution space-borne D-InSAR},\njournal = {Remote Sensing of Environment},\nauthor = {Siles, Gabriela and Trudel, Melanie and Peters, Daniel L. and Leconte, Robert},\nvolume = {236},\nyear = {2020},\nissn = {00344257},\nabstract = {Extensive high-latitude regions, such as northern deltaic ecosystems, are challenging to access due to remoteness and cold conditions during extended periods of the year. The hydro-ecological state of shallow water ecosystems can be influenced by anthropogenic activities (e.g., flow regulation, water abstraction) and climate variability/change. Therefore, they need to be monitored to provide baseline and impact data. In this paper, we capitalize on the water - vegetation interaction to evaluate relative water level variations on wetlands of one of the largest inland freshwater deltas in the world between the years 2012 and 2016 by exploiting RADARSAT-2 Synthetic Aperture Radar (SAR) and its differential interferometric configuration (D-InSAR). The influence of different terrain models on the topographic phase correction is also evaluated. Results revealed complex hydrodynamics in the water bodies studied and inferences of environmental processes taking place that modify local landforms and influence water level fluctuations. Comparison between D-InSAR derived water displacements and those measured at specific hydrometric stations indicates overall reliable results. The analysis proposed can be extended to study dynamics of deltaic lakes and wetlands in other areas of the globe.<br/> © 2019},\nkey = {Hydrodynamics},\n%keywords = {Wetlands;Water levels;Synthetic aperture radar;Ecosystems;},\n%note = {Anthropogenic activity;D-inSAR;Hydrological monitoring;Interferometric configuration;Peace-athabasca deltas;Shallow water ecosystems;Water level variations;Water-level fluctuation;},\nURL = {http://dx.doi.org/10.1016/j.rse.2019.111444},\n} \n\n\n
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\n Extensive high-latitude regions, such as northern deltaic ecosystems, are challenging to access due to remoteness and cold conditions during extended periods of the year. The hydro-ecological state of shallow water ecosystems can be influenced by anthropogenic activities (e.g., flow regulation, water abstraction) and climate variability/change. Therefore, they need to be monitored to provide baseline and impact data. In this paper, we capitalize on the water - vegetation interaction to evaluate relative water level variations on wetlands of one of the largest inland freshwater deltas in the world between the years 2012 and 2016 by exploiting RADARSAT-2 Synthetic Aperture Radar (SAR) and its differential interferometric configuration (D-InSAR). The influence of different terrain models on the topographic phase correction is also evaluated. Results revealed complex hydrodynamics in the water bodies studied and inferences of environmental processes taking place that modify local landforms and influence water level fluctuations. Comparison between D-InSAR derived water displacements and those measured at specific hydrometric stations indicates overall reliable results. The analysis proposed can be extended to study dynamics of deltaic lakes and wetlands in other areas of the globe.
© 2019\n
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\n \n\n \n \n \n \n \n \n Mineralogical and lithological unmixing with radiative transfer modelling in the open-pit context of Mine Canadian Malartic.\n \n \n \n \n\n\n \n Clabaut, E.; Germain, M.; Goita, K.; Morisset, C.; Plante, B.; Tessier, C.; Lemelin, M.; Hebert, R.; and Siebels, K.\n\n\n \n\n\n\n Journal of Quantitative Spectroscopy and Radiative Transfer, 241. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"MineralogicalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194607676048 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Mineralogical and lithological unmixing with radiative transfer modelling in the open-pit context of Mine Canadian Malartic},\njournal = {Journal of Quantitative Spectroscopy and Radiative Transfer},\nauthor = {Clabaut, Etienne and Germain, Mickael and Goita, Kalifa and Morisset, Caroline-Emmanuelle and Plante, Benoit and Tessier, Christian and Lemelin, Myriam and Hebert, Ronan and Siebels, Kevin},\nvolume = {241},\nyear = {2020},\nissn = {00224073},\nabstract = {In this study, Hapke's radiative transfer model is used to verify the feasibility of retrieving the composition and grain-size of the ground in an open-pit mine, seen as a regolith. Such a tool could be useful for dust surveys and thus preventing potential environmental risks such as acid mine drainage. As the true compositional endmembers of the medium are not retrieved but rather chosen from spectral libraries and the range of grain sizes (a few to hundreds of micrometers) and porosities (0.22 to 0.52 for the filling factor) vary greatly in an open-pit mine, we show that the mineralogical unmixing results are not reliable. Too many combinations of different relative abundances, grain sizes and porosities lead to fits between modelled and measured spectra under 0.3% in reflectance. To tackle this issue, we explore a lithological unmixing approach. Considering lithologies as endmembers, as opposed to considering minerals, reduces the variability in the solutions as fewer endmembers are used. The results show that the studied samples with multi-component grains behave spectrally as expected for mono-mineral grains. With no root mean square errors higher than 5%, the relative abundances retrieved are sufficiently precise to consider mapping lithologies with this method.<br/> © 2019 Elsevier Ltd},\nkey = {Porosity},\n%keywords = {Lithology;Grain size and shape;Mean square error;Radiative transfer;Open pit mining;},\n%note = {Acid mine drainage;Environmental risks;Grain size;Radiative transfer model;Radiative transfer modelling;Root mean square errors;Spectral libraries;Unmixing;},\nURL = {http://dx.doi.org/10.1016/j.jqsrt.2019.106707},\n} \n\n\n
\n
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\n In this study, Hapke's radiative transfer model is used to verify the feasibility of retrieving the composition and grain-size of the ground in an open-pit mine, seen as a regolith. Such a tool could be useful for dust surveys and thus preventing potential environmental risks such as acid mine drainage. As the true compositional endmembers of the medium are not retrieved but rather chosen from spectral libraries and the range of grain sizes (a few to hundreds of micrometers) and porosities (0.22 to 0.52 for the filling factor) vary greatly in an open-pit mine, we show that the mineralogical unmixing results are not reliable. Too many combinations of different relative abundances, grain sizes and porosities lead to fits between modelled and measured spectra under 0.3% in reflectance. To tackle this issue, we explore a lithological unmixing approach. Considering lithologies as endmembers, as opposed to considering minerals, reduces the variability in the solutions as fewer endmembers are used. The results show that the studied samples with multi-component grains behave spectrally as expected for mono-mineral grains. With no root mean square errors higher than 5%, the relative abundances retrieved are sufficiently precise to consider mapping lithologies with this method.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Transient acoustic wave propagation in bone-like porous materials using the theory of poroelasticity and fractional derivative: a sensitivity analysis.\n \n \n \n \n\n\n \n Hodaei, M.; Rabbani, V.; and Maghoul, P.\n\n\n \n\n\n\n Acta Mechanica, 231(1): 179 - 203. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"TransientPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194507644583 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Transient acoustic wave propagation in bone-like porous materials using the theory of poroelasticity and fractional derivative: a sensitivity analysis},\njournal = {Acta Mechanica},\nauthor = {Hodaei, M. and Rabbani, V. and Maghoul, P.},\nvolume = {231},\nnumber = {1},\nyear = {2020},\npages = {179 - 203},\nissn = {00015970},\nabstract = {In this paper, the transient acoustic wave propagation in a bone-like porous material saturated with a viscous fluid was investigated using Biot’s theory. Due to the interaction between the viscous fluid and solid skeleton, the damping behavior is proportional to a fractional power of frequency, i.e., the dynamic tortuosity was written in terms of the fractional power of frequency. Furthermore, to describe the viscous interaction of fluid and solid in the time domain, the fractional derivative was used. The fast and slow waves, which are the solutions to Biot’s equations, were described by fractional calculus in the time domain. The reflection and transmission operators were expressed in the Laplace domain and inverted into the time domain using Durbin’s numerical inversion. Once the numerical implementation was validated, the effects of porosity and viscosity on the stress, and reflected and transmitted waves were investigated. The results showed that by increasing the porosity the stress in a bone-like material filled with either air or bone marrow increases. The transmitted pressure decreases by increasing the porosity. The reflected pressure decreases for low viscous fluid when the porosity increases while it increases when the viscosity of the fluid is high. In addition, the results showed the importance of taking into account the fractional derivatives in the transient wave propagation in such porous materials.<br/> © 2019, Springer-Verlag GmbH Austria, part of Springer Nature.},\nkey = {Porosity},\n%keywords = {Acoustic wave propagation;Porous materials;Viscosity;Acoustic waves;Sensitivity analysis;Calculations;Viscous flow;},\n%note = {Dynamic tortuosities;Fractional calculus;Fractional derivatives;Numerical implementation;Numerical inversion;Reflection and transmission;Transient wave propagation;Viscous interaction;},\nURL = {http://dx.doi.org/10.1007/s00707-019-02513-9},\n} \n\n\n
\n
\n\n\n
\n In this paper, the transient acoustic wave propagation in a bone-like porous material saturated with a viscous fluid was investigated using Biot’s theory. Due to the interaction between the viscous fluid and solid skeleton, the damping behavior is proportional to a fractional power of frequency, i.e., the dynamic tortuosity was written in terms of the fractional power of frequency. Furthermore, to describe the viscous interaction of fluid and solid in the time domain, the fractional derivative was used. The fast and slow waves, which are the solutions to Biot’s equations, were described by fractional calculus in the time domain. The reflection and transmission operators were expressed in the Laplace domain and inverted into the time domain using Durbin’s numerical inversion. Once the numerical implementation was validated, the effects of porosity and viscosity on the stress, and reflected and transmitted waves were investigated. The results showed that by increasing the porosity the stress in a bone-like material filled with either air or bone marrow increases. The transmitted pressure decreases by increasing the porosity. The reflected pressure decreases for low viscous fluid when the porosity increases while it increases when the viscosity of the fluid is high. In addition, the results showed the importance of taking into account the fractional derivatives in the transient wave propagation in such porous materials.
© 2019, Springer-Verlag GmbH Austria, part of Springer Nature.\n
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\n \n\n \n \n \n \n \n \n Shear Strength Experiments and Design of Cold-Formed Steel Channels with Web Holes.\n \n \n \n \n\n\n \n Pham, S. H.; Pham, C. H.; Rogers, C. A.; and Hancock, G. J.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 146(1). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ShearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194507623265 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shear Strength Experiments and Design of Cold-Formed Steel Channels with Web Holes},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Pham, Song Hong and Pham, Cao Hung and Rogers, Colin A. and Hancock, Gregory J.},\nvolume = {146},\nnumber = {1},\nyear = {2020},\nissn = {07339445},\nabstract = {In the latest North American specification for the design of cold-formed steel (CFS) structural members and the Australian/New Zealand standard for cold-formed steel structures, an empirical approach is specified to design beams with web holes in shear. Recently, an alternative based on the direct strength method (DSM) of design for shear for perforated beams with the aspect ratio (shear-span/web-depth) of 1.0 has been proposed. This paper presents a comprehensive review of the proposal and an experimental validation using results from a test series on channels with a shear span aspect ratio of 2.0 and with various square and circular web opening sizes conducted at the University of Sydney, and other experimental data collected from the literature. It is proven that the earlier proposal reliably predicts the shear strength of CFS perforated members with central square and circular web holes and with an aspect ratio up to 2.0. An approximate equation to determine shear buckling coefficients is derived to allow shear buckling forces, an input of the DSM design equation, to be computed directly on the basis of geometrical dimensions of perforated members. Finite-element models of the tests are also developed and validated to study the variation of the shear strengths with respect to the hole sizes where considerable shear strengths of members with substantially large web holes extending up to the full depths of the webs are observed. Further, the experimental shear strengths are used to calibrate the DSM-based proposal. It is confirmed that the resistance factors for shear design being used in the current North American specification and Australian/New Zealand standard are applicable.<br/> © 2019 American Society of Civil Engineers.},\nkey = {Aspect ratio},\n%keywords = {Shear flow;Studs (structural members);Buckling;Shear strength;Specifications;},\n%note = {Circular web openings;Cold-formed steel structures;Direct strength methods;Experimental validations;Geometrical dimensions;Shear buckling coefficients;Strength experiments;University of Sydney;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002464},\n} \n\n\n
\n
\n\n\n
\n In the latest North American specification for the design of cold-formed steel (CFS) structural members and the Australian/New Zealand standard for cold-formed steel structures, an empirical approach is specified to design beams with web holes in shear. Recently, an alternative based on the direct strength method (DSM) of design for shear for perforated beams with the aspect ratio (shear-span/web-depth) of 1.0 has been proposed. This paper presents a comprehensive review of the proposal and an experimental validation using results from a test series on channels with a shear span aspect ratio of 2.0 and with various square and circular web opening sizes conducted at the University of Sydney, and other experimental data collected from the literature. It is proven that the earlier proposal reliably predicts the shear strength of CFS perforated members with central square and circular web holes and with an aspect ratio up to 2.0. An approximate equation to determine shear buckling coefficients is derived to allow shear buckling forces, an input of the DSM design equation, to be computed directly on the basis of geometrical dimensions of perforated members. Finite-element models of the tests are also developed and validated to study the variation of the shear strengths with respect to the hole sizes where considerable shear strengths of members with substantially large web holes extending up to the full depths of the webs are observed. Further, the experimental shear strengths are used to calibrate the DSM-based proposal. It is confirmed that the resistance factors for shear design being used in the current North American specification and Australian/New Zealand standard are applicable.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Comparative whole building LCAs: How far are our expectations from the documented evidence?.\n \n \n \n \n\n\n \n Saade, M. R. M.; Guest, G.; and Amor, B.\n\n\n \n\n\n\n Building and Environment, 167. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"ComparativePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194207539082 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Comparative whole building LCAs: How far are our expectations from the documented evidence?},\njournal = {Building and Environment},\nauthor = {Saade, Marcella Ruschi Mendes and Guest, Geoffrey and Amor, Ben},\nvolume = {167},\nyear = {2020},\nissn = {03601323},\nabstract = {Buildings are responsible for a considerable portion of the embodied and operational CO<inf>2</inf> emitted by human activities. Some building attributes have taken on the mantle of "environmentally preferable". Through a systematic literature review, this paper investigates if the literature on whole building Life Cycle Assessments (LCA) confirms some environmental assumptions that are perceived as always truthful, e.g. (i) "wood is better than concrete and steel", (ii) "renovation is preferable to demolishing and building anew", and (iii)"operational loads are more intensive than embodied loads". The search also allowed to trace if advanced methodological modelling in LCA brings new insights into the mentioned perceptions. The assessment of over 250 case studies pointed that LCAs applied to complex systems, such as a building, embed crucial issues to be modeled, and rules of thumb lose veracity. Furthermore, as LCA incorporates deepened mathematical models, outcomes become less predictable, and paradigms should be interpreted with care.<br/> © 2019 Elsevier Ltd},\nkey = {Buildings},\n%keywords = {Life cycle;},\n%note = {Biogenic;Building life cycle;Case-studies;Consequential;Human activities;Life Cycle Assessment (LCA);Operational loads;Systematic literature review;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2019.106449},\n} \n\n\n
\n
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\n Buildings are responsible for a considerable portion of the embodied and operational CO2 emitted by human activities. Some building attributes have taken on the mantle of \"environmentally preferable\". Through a systematic literature review, this paper investigates if the literature on whole building Life Cycle Assessments (LCA) confirms some environmental assumptions that are perceived as always truthful, e.g. (i) \"wood is better than concrete and steel\", (ii) \"renovation is preferable to demolishing and building anew\", and (iii)\"operational loads are more intensive than embodied loads\". The search also allowed to trace if advanced methodological modelling in LCA brings new insights into the mentioned perceptions. The assessment of over 250 case studies pointed that LCAs applied to complex systems, such as a building, embed crucial issues to be modeled, and rules of thumb lose veracity. Furthermore, as LCA incorporates deepened mathematical models, outcomes become less predictable, and paradigms should be interpreted with care.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Energy performance of below-grade envelope of an institutional building in cold regions.\n \n \n \n \n\n\n \n Saaly, M.; Bobko, K.; Maghoul, P.; Kavgic, M.; and Hollander, H.\n\n\n \n\n\n\n Journal of Building Engineering, 27. 2020.\n \n\n\n\n
\n\n\n\n \n \n \"EnergyPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20193807444592 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Energy performance of below-grade envelope of an institutional building in cold regions},\njournal = {Journal of Building Engineering},\nauthor = {Saaly, Maryam and Bobko, Kiril and Maghoul, Pooneh and Kavgic, Miroslava and Hollander, Hartmut},\nvolume = {27},\nyear = {2020},\nissn = {23527102},\nabstract = {The effects of freeze-thaw cycles on the thermal properties of foundation soils are often neglected in many building energy simulation programs. Consequently, there is a lack of research focused on the energy dissipation through the below-grade enclosure of buildings in cold regions, where freeze-thaw cycles occur in soils. This paper aims to investigate the energy performance of the below-grade envelope of an institutional building in cold regions by considering the effect of pore water phase change on the thermal properties and consequently the heat exchange between the basement structure and the surrounding soils. For this purpose, the energy loss through the below-grade envelope of the building was numerically studied using 3-D and 2-D analyses. Moreover, the importance of a promising insulation system for the basement of the building was investigated in this paper. The results showed that the energy loss through the below-grade enclosure of the building decreased by approximately 60% when the insulation layers were added to the basement walls and floor slab (i.e., a 230 mm thick insulation layer underneath the floor slab and a 125 mm thick insulation layer surrounding the basement walls). Although reduced, the below-grade heat losses were still significant. To mitigate that, an additional horizontal insulation layer was attached to the basement walls, which lowered the heat loss through the basement walls by 23%. In addition, it was concluded that the presence of a layer of backfill materials surrounding the basement walls that was initially designed for drainage purposes, decreased the basement heat loss by 16.5%. Finally, the results of the 3-D analysis were compared to an equivalent 2-D analysis. The results showed that the 2-D model predicted approximately 22% higher heat flux compared to the 3-D model.<br/> © 2019 Elsevier Ltd},\nkey = {Thermal insulation},\n%keywords = {Floors;Walls (structural partitions);Energy efficiency;Thawing;Freezing;Heat losses;Heat flux;Enclosures;Soils;},\n%note = {Basement structures;Below-grade envelope;Building energy simulations;Energy performance;Foundation soils;Freeze-thaw cycles;Institutional building;Insulation system;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2019.100911},\n} \n\n\n
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\n The effects of freeze-thaw cycles on the thermal properties of foundation soils are often neglected in many building energy simulation programs. Consequently, there is a lack of research focused on the energy dissipation through the below-grade enclosure of buildings in cold regions, where freeze-thaw cycles occur in soils. This paper aims to investigate the energy performance of the below-grade envelope of an institutional building in cold regions by considering the effect of pore water phase change on the thermal properties and consequently the heat exchange between the basement structure and the surrounding soils. For this purpose, the energy loss through the below-grade envelope of the building was numerically studied using 3-D and 2-D analyses. Moreover, the importance of a promising insulation system for the basement of the building was investigated in this paper. The results showed that the energy loss through the below-grade enclosure of the building decreased by approximately 60% when the insulation layers were added to the basement walls and floor slab (i.e., a 230 mm thick insulation layer underneath the floor slab and a 125 mm thick insulation layer surrounding the basement walls). Although reduced, the below-grade heat losses were still significant. To mitigate that, an additional horizontal insulation layer was attached to the basement walls, which lowered the heat loss through the basement walls by 23%. In addition, it was concluded that the presence of a layer of backfill materials surrounding the basement walls that was initially designed for drainage purposes, decreased the basement heat loss by 16.5%. Finally, the results of the 3-D analysis were compared to an equivalent 2-D analysis. The results showed that the 2-D model predicted approximately 22% higher heat flux compared to the 3-D model.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Laboratory simulator for geotechnical penetration tests.\n \n \n \n \n\n\n \n Ghali, M.; Chekired, M.; and Karray, M.\n\n\n \n\n\n\n Geotechnical Testing Journal, 43(1). 2020.\n \n\n\n\n
\n\n\n\n \n \n \"LaboratoryPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20191606808925 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Laboratory simulator for geotechnical penetration tests},\njournal = {Geotechnical Testing Journal},\nauthor = {Ghali, Michael and Chekired, Mohamed and Karray, Mourad},\nvolume = {43},\nnumber = {1},\nyear = {2020},\nissn = {01496115},\nabstract = {The most widely used methods for the in situ investigation of the mechanical characteristics of soil are field penetration tests such as the standard and cone penetration tests, which apply several empirical correlations. Many geotechnical researchers have tried to improve the empirical correlations by analyzing comparisons of field penetration tests and laboratory simulations, as well as virtual numerical simulations. However, geotechnical parameters such as relative density, void ratio range, grain size distribution, angularity, mean particle size, uniformity coefficient, effective overburden stress, and mean confinement stress have interlocking effects. Consequently, the use of calibration chambers, which can simulate ideal conditions for the soil in the laboratory, are essential. The authors have developed an axisymmetric innovative simulator system, not only to perform parametric studies on the aforementioned parameters but also to simulate a range of field conditions under substantially controlled boundary conditions. This article also presents results for a series of calibration tests to prove its applicability on nonplastic silts, sands, and granular materials. Repetitive tests, under identical testing circumstances, verified the accuracy, efficiency, and durability of the system. The current work also correlates with the results of comparative studies to investigate the effectiveness of the simulations.<br/> Copyright © 2019 by ASTM International},\nkey = {Particle size},\n%keywords = {Granular materials;Durability;Calibration;Simulators;Grain size and shape;},\n%note = {Calibration chamber;Cone penetration tests;Effective overburden stress;Geotechnical parameters;Grain size distribution;In-situ investigations;Mechanical characteristics;Standard penetration test;},\nURL = {http://dx.doi.org/10.1520/GTJ20170413},\n} \n\n\n
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\n The most widely used methods for the in situ investigation of the mechanical characteristics of soil are field penetration tests such as the standard and cone penetration tests, which apply several empirical correlations. Many geotechnical researchers have tried to improve the empirical correlations by analyzing comparisons of field penetration tests and laboratory simulations, as well as virtual numerical simulations. However, geotechnical parameters such as relative density, void ratio range, grain size distribution, angularity, mean particle size, uniformity coefficient, effective overburden stress, and mean confinement stress have interlocking effects. Consequently, the use of calibration chambers, which can simulate ideal conditions for the soil in the laboratory, are essential. The authors have developed an axisymmetric innovative simulator system, not only to perform parametric studies on the aforementioned parameters but also to simulate a range of field conditions under substantially controlled boundary conditions. This article also presents results for a series of calibration tests to prove its applicability on nonplastic silts, sands, and granular materials. Repetitive tests, under identical testing circumstances, verified the accuracy, efficiency, and durability of the system. The current work also correlates with the results of comparative studies to investigate the effectiveness of the simulations.
Copyright © 2019 by ASTM International\n
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\n  \n 2019\n \n \n (148)\n \n \n
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\n \n\n \n \n \n \n \n \n Centripetal filtration of groundwater to improve the lifetime of an MgO recycled refractory filter: observations and technical challenges.\n \n \n \n \n\n\n \n de Repentigny, C.; Zagury, G. J.; and Courcelles, B.\n\n\n \n\n\n\n Environmental Science and Pollution Research, 26(15): 15314 - 15323. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"CentripetalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20241916068685 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Centripetal filtration of groundwater to improve the lifetime of an MgO recycled refractory filter: observations and technical challenges},\njournal = {Environmental Science and Pollution Research},\nauthor = {de Repentigny, Carl and Zagury, Gerald J. and Courcelles, Benoit},\nvolume = {26},\nnumber = {15},\nyear = {2019},\npages = {15314 - 15323},\nissn = {09441344},\nabstract = {<div data-language="eng" data-ev-field="abstract">In the context of improving permeable reactive barrier (PRB) filters, axial and a centripetal column tests were performed to compare their evolution in terms of chemical and hydraulic performances. For both tests, the MgO reactive media, made of crushed (< 10 mm) spent MgO–C refractory bricks was used to treat water contaminated with Co and Ni by raising the pH and promoting hydroxide precipitation. As opposed to the traditional cylindrical axial configuration, the centripetal column consists of an annulus of reactive media through which the water flows from the outer radius towards the inner radius. Under similar conditions (total reactive mass, porosity), the centripetal column is expected to delay the breakthrough of contaminants because of its higher cross-section and lower flow speeds at the entrance of the media. However, as we found in this study, the design of a granular radial filter poses several technical problems. Indeed, a breakthrough of the contaminants, accompanied by a decline in pH, was observed much sooner in the centripetal (100 pv) than in the axial (375 pv) filter. This lower performance was deemed to be due to a hydraulic shortcut and was supported by the results of a tracer test (average renewal volume much lower (199 ml) than the theoretical one (7530 ml)) as well as the observation of preferential clogging upon dismounting the radial filter. While the design of a filter that induces a purely radial flow still poses a technical challenge, this study contributes to advance the knowledge for centripetal radial filtration of groundwater in PRBs.<br/></div> © Springer-Verlag GmbH Germany, part of Springer Nature 2019.},\nkey = {Groundwater},\n%keywords = {Filtration;Magnesia;Precipitation (chemical);Radial flow;Refractory materials;Water treatment;},\n%note = {Chemical performance;Column test;Hydraulic performance;Metal precipitation;MgO-C-refractory;Permeable reactive barriers;Radial filtration;Reactive medium;Refractory bricks;Technical challenges;},\nURL = {http://dx.doi.org/10.1007/s11356-019-04910-y},\n} \n\n\n
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\n
In the context of improving permeable reactive barrier (PRB) filters, axial and a centripetal column tests were performed to compare their evolution in terms of chemical and hydraulic performances. For both tests, the MgO reactive media, made of crushed (< 10 mm) spent MgO–C refractory bricks was used to treat water contaminated with Co and Ni by raising the pH and promoting hydroxide precipitation. As opposed to the traditional cylindrical axial configuration, the centripetal column consists of an annulus of reactive media through which the water flows from the outer radius towards the inner radius. Under similar conditions (total reactive mass, porosity), the centripetal column is expected to delay the breakthrough of contaminants because of its higher cross-section and lower flow speeds at the entrance of the media. However, as we found in this study, the design of a granular radial filter poses several technical problems. Indeed, a breakthrough of the contaminants, accompanied by a decline in pH, was observed much sooner in the centripetal (100 pv) than in the axial (375 pv) filter. This lower performance was deemed to be due to a hydraulic shortcut and was supported by the results of a tracer test (average renewal volume much lower (199 ml) than the theoretical one (7530 ml)) as well as the observation of preferential clogging upon dismounting the radial filter. While the design of a filter that induces a purely radial flow still poses a technical challenge, this study contributes to advance the knowledge for centripetal radial filtration of groundwater in PRBs.
© Springer-Verlag GmbH Germany, part of Springer Nature 2019.\n
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\n \n\n \n \n \n \n \n \n Normalized dynamic behavior of combined sewer overflow discharges for source water characterization and management.\n \n \n \n \n\n\n \n Taghipour, M.; Tolouei, S.; Autixier, L.; Prevost, M.; Shakibaeinia, A.; and Dorner, S.\n\n\n \n\n\n\n Journal of Environmental Management, 249. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"NormalizedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20233414578760 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Normalized dynamic behavior of combined sewer overflow discharges for source water characterization and management},\njournal = {Journal of Environmental Management},\nauthor = {Taghipour, M. and Tolouei, Samira and Autixier, Laurene and Prevost, Michele and Shakibaeinia, A. and Dorner, S.},\nvolume = {249},\nyear = {2019},\nissn = {03014797},\nabstract = {<div data-language="eng" data-ev-field="abstract">As one of the major sources of surface water quality impairments, Combined Sewer Overflows (CSOs) are of concern when receiving waters are used for drinking water supplies. Given the large number and variability in CSO discharges and loads, there is a need for a general methodology for estimating discharges for environmental planning and source water protection. Detailed data on CSO flowrates, contaminant concentrations including Total Suspended Solids (TSS), Escherichia coli (E. coli), caffeine (CAF) and acetaminophen (ACE) were used to develop a simple loading model that was then verified using discharge and concentration data from other CSO and stormwater events in the literature. The variability of the parameters within each event was analyzed by normalizing flowrate, concentration and event duration to their respective peak values. The normalized flowrate data indicate that the second decile of the discharge periods was associated with peak flowrates. The dynamic behavior of CSO flowrates can be characterized by a linearly increasing trend and then a logarithmically decreasing trend in terms of normalized values. The samples captured during the first decile of the events were illustrated to be a better representation of peak concentrations of all four contaminants. By analyzing the discharge period in three sections (i.e. 1st decile, 2nd decile and remainder), a semi-probabilistic CSO loading model is proposed for the entire discharge period taking into account the variability of the phenomena. Findings can help water managers and utilities to characterize their source waters for better planning and to more efficiently design sampling campaigns for capturing peak concentrations at drinking water treatment plants.<br/></div> © 2019 Elsevier Ltd},\nkey = {Loading},\n%keywords = {Escherichia coli;Potable water;Surface waters;Water quality;Water supply;Water treatment;},\n%note = {Combined sewer overflows;Discharge behaviour;Dynamic behaviors;Loading models;Micropollutants;Probabilistic loading;Probabilistics;Source waters;Total suspended solids;Wastewater micropollutant;},\nURL = {http://dx.doi.org/10.1016/j.jenvman.2019.109386},\n} \n\n\n
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As one of the major sources of surface water quality impairments, Combined Sewer Overflows (CSOs) are of concern when receiving waters are used for drinking water supplies. Given the large number and variability in CSO discharges and loads, there is a need for a general methodology for estimating discharges for environmental planning and source water protection. Detailed data on CSO flowrates, contaminant concentrations including Total Suspended Solids (TSS), Escherichia coli (E. coli), caffeine (CAF) and acetaminophen (ACE) were used to develop a simple loading model that was then verified using discharge and concentration data from other CSO and stormwater events in the literature. The variability of the parameters within each event was analyzed by normalizing flowrate, concentration and event duration to their respective peak values. The normalized flowrate data indicate that the second decile of the discharge periods was associated with peak flowrates. The dynamic behavior of CSO flowrates can be characterized by a linearly increasing trend and then a logarithmically decreasing trend in terms of normalized values. The samples captured during the first decile of the events were illustrated to be a better representation of peak concentrations of all four contaminants. By analyzing the discharge period in three sections (i.e. 1st decile, 2nd decile and remainder), a semi-probabilistic CSO loading model is proposed for the entire discharge period taking into account the variability of the phenomena. Findings can help water managers and utilities to characterize their source waters for better planning and to more efficiently design sampling campaigns for capturing peak concentrations at drinking water treatment plants.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n An innovative concrete-steel structural system for long-span structure allowing a fast and simple erection.\n \n \n \n \n\n\n \n Lepourry, C.; Heng, P.; Somja, H.; Boissonnade, N.; and Palas, F.\n\n\n \n\n\n\n Structures, 21: 55 - 74. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"AnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20232014096814 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {An innovative concrete-steel structural system for long-span structure allowing a fast and simple erection},\njournal = {Structures},\nauthor = {Lepourry, Clemence and Heng, Piseth and Somja, Hugues and Boissonnade, Nicolas and Palas, Franck},\nvolume = {21},\nyear = {2019},\npages = {55 - 74},\nissn = {23520124},\nabstract = {<div data-language="eng" data-ev-field="abstract">In achieving medium-to-long span slab, steel-concrete composite beams may offer an alternative over pre-stressed beams for the so-called disadvantages of the latter; for example the heavy weight of pre-stressed beams makes their handling expansive. However, the use of composite beams by concrete builders is still limited due to the lack of specific tools and skills for on-site erections and the need for a supplementary fire protection. This article presents an innovative steel-concrete moment resisting portal frame that overcomes these difficulties. It is composed of composite tubular columns, and a composite beam made of a U-shape steel profile used as permanent formwork to encase a concrete beam. The steel-concrete duality of the proposed beam allows an erection on site without any weld or bolt by a wise positioning of the construction joints. As only steel elements have to be handled on site, there is no need of heavy cranes. This system has been used to build a research center near Rennes, in France. As it is not covered in present norms, an experimental validation was required. In this paper, a series of full-scale experimental tests that have been performed in order to assess the global and the local behaviour of the frame and its connections are presented. A series of asymmetrical push-out tests were carried out in order to determine the ductility and resistance of shear connectors; one 4-point bending test was made to investigate the resistance under sagging bending moment; and, two tests of the beam-to-column joint were performed in order to validate a strut and tie design model of the joint. Finite element simulations have also been made in order to acquire more information for the development of the analytical models.<br/></div> © 2019 Institution of Structural Engineers},\nURL = {http://dx.doi.org/10.1016/j.istruc.2019.04.016},\n} \n\n\n
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In achieving medium-to-long span slab, steel-concrete composite beams may offer an alternative over pre-stressed beams for the so-called disadvantages of the latter; for example the heavy weight of pre-stressed beams makes their handling expansive. However, the use of composite beams by concrete builders is still limited due to the lack of specific tools and skills for on-site erections and the need for a supplementary fire protection. This article presents an innovative steel-concrete moment resisting portal frame that overcomes these difficulties. It is composed of composite tubular columns, and a composite beam made of a U-shape steel profile used as permanent formwork to encase a concrete beam. The steel-concrete duality of the proposed beam allows an erection on site without any weld or bolt by a wise positioning of the construction joints. As only steel elements have to be handled on site, there is no need of heavy cranes. This system has been used to build a research center near Rennes, in France. As it is not covered in present norms, an experimental validation was required. In this paper, a series of full-scale experimental tests that have been performed in order to assess the global and the local behaviour of the frame and its connections are presented. A series of asymmetrical push-out tests were carried out in order to determine the ductility and resistance of shear connectors; one 4-point bending test was made to investigate the resistance under sagging bending moment; and, two tests of the beam-to-column joint were performed in order to validate a strut and tie design model of the joint. Finite element simulations have also been made in order to acquire more information for the development of the analytical models.
© 2019 Institution of Structural Engineers\n
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\n \n\n \n \n \n \n \n \n A Study on the Performance of Insulation for Buried Utilities in Cold Regions.\n \n \n \n \n\n\n \n Liu, H.; Maghoul, P.; Shalaby, A.; and Kavanagh, L.\n\n\n \n\n\n\n In pages 73 - 82, Quebec City, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20223912805358 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A Study on the Performance of Insulation for Buried Utilities in Cold Regions},\njournal = {Cold Regions Engineering 2019 - Proceedings of the 18th International Conference on Cold Regions Engineering and the 8th Canadian Permafrost Conference},\nauthor = {Liu, H. and Maghoul, P. and Shalaby, A. and Kavanagh, L.},\nyear = {2019},\npages = {73 - 82},\naddress = {Quebec City, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Damage due to the frost penetration in soils can be detrimental to buried utilities such as water and gas pipes. It would not only reduce their service life but may also induce service interruptions and public safety concerns. Therefore, buried pipes should be located below the frost depth to prevent them from the frost damage. An alternative approach to protect buried utilities against frost damage and reduce the construction cost is to install insulations over and around the pipes. This paper aims to study the performance of the insulation materials with various geometries to prevent buried utilities from the frost damage in frost-susceptible soils. For this purpose, a comparative study is performed to determine the effect of phase change on the performance of the insulating foam with various geometries. Also, various geometries of insulation including horizontal, inverted U-shaped, and cylindrical insulations are modeled in order to present the best insulation configuration.<br/></div> © 2019 American Society of Civil Engineers.},\nkey = {Insulation},\n%keywords = {Geometry;Soils;},\n%note = {Buried utilities;Cold regions;Frost action;Frost damage;Frost penetrations;Gas pipes;Performance;Phase Change;Service interruption;Water pipes;},\nURL = {http://dx.doi.org/10.1061/9780784482599.009},\n} \n\n\n
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Damage due to the frost penetration in soils can be detrimental to buried utilities such as water and gas pipes. It would not only reduce their service life but may also induce service interruptions and public safety concerns. Therefore, buried pipes should be located below the frost depth to prevent them from the frost damage. An alternative approach to protect buried utilities against frost damage and reduce the construction cost is to install insulations over and around the pipes. This paper aims to study the performance of the insulation materials with various geometries to prevent buried utilities from the frost damage in frost-susceptible soils. For this purpose, a comparative study is performed to determine the effect of phase change on the performance of the insulating foam with various geometries. Also, various geometries of insulation including horizontal, inverted U-shaped, and cylindrical insulations are modeled in order to present the best insulation configuration.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Thermal Performance of a Proposed Geothermal Piles System for Re-Harvesting Heat Loss through the Building Below-Grade Enclosure in Cold Regions.\n \n \n \n \n\n\n \n Saaly, M.; and Maghoul, P.\n\n\n \n\n\n\n In pages 457 - 465, Quebec City, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"ThermalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20223912805163 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Thermal Performance of a Proposed Geothermal Piles System for Re-Harvesting Heat Loss through the Building Below-Grade Enclosure in Cold Regions},\njournal = {Cold Regions Engineering 2019 - Proceedings of the 18th International Conference on Cold Regions Engineering and the 8th Canadian Permafrost Conference},\nauthor = {Saaly, M. and Maghoul, P.},\nyear = {2019},\npages = {457 - 465},\naddress = {Quebec City, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Thermal performance of a proposed group of geothermal piles for supplying the energy demand of a building is studied in this paper. The building is located in the Fort-Garry campus of the University of Manitoba in Winnipeg, MB, Canada. Due to the heat loss of the below-grade envelope of buildings in urban areas, soil temperature rises significantly. The proposed geothermal piles are aimed at re-harvesting the heat leaked into the ground through the basement structure. Further, the thermal performance of the proposed geothermal pile system has been analyzed numerically. One of the most important impediments for wide application of geothermal piles in cold regions like Canada, where annual heat extraction from the soil is higher than heat rejection into it, is the underground thermal imbalance which is widely investigated in this study. Based on the results, the temperature of the soil increases up to 6°C due to the heat leakage of basements of both studied building and its surrounding buildings. Despite the injected heat to the ground due to the building heat leakage, the thermal imbalance occurs in the soil in case of supplying 100% of the building heat demand during the winter and 100% of its cold demand during the summer by geothermal piles which necessitates further consideration for efficient application of geothermal energy using thermal piles in Canada.<br/></div> © 2019 American Society of Civil Engineers.},\nkey = {Piles},\n%keywords = {Buildings;Geotechnical engineering;Geothermal energy;Heat losses;Soils;},\n%note = {Cold regions;Energy demands;Energy piles;Geothermal energy pile;Heat leakage;Manitoba;Pile systems;Renewable energies;Thermal imbalance;Thermal Performance;},\nURL = {http://dx.doi.org/10.1061/9780784482599.053},\n} \n\n\n
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Thermal performance of a proposed group of geothermal piles for supplying the energy demand of a building is studied in this paper. The building is located in the Fort-Garry campus of the University of Manitoba in Winnipeg, MB, Canada. Due to the heat loss of the below-grade envelope of buildings in urban areas, soil temperature rises significantly. The proposed geothermal piles are aimed at re-harvesting the heat leaked into the ground through the basement structure. Further, the thermal performance of the proposed geothermal pile system has been analyzed numerically. One of the most important impediments for wide application of geothermal piles in cold regions like Canada, where annual heat extraction from the soil is higher than heat rejection into it, is the underground thermal imbalance which is widely investigated in this study. Based on the results, the temperature of the soil increases up to 6°C due to the heat leakage of basements of both studied building and its surrounding buildings. Despite the injected heat to the ground due to the building heat leakage, the thermal imbalance occurs in the soil in case of supplying 100% of the building heat demand during the winter and 100% of its cold demand during the summer by geothermal piles which necessitates further consideration for efficient application of geothermal energy using thermal piles in Canada.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Validation and comparison of cropland leaf area index retrievals from sentinel-2/MSI data using SL2P processor and vegetation indices models.\n \n \n \n \n\n\n \n Djamai, N.; Fernandes, R.; Weiss, M.; McNairn, H.; and Goita, K.\n\n\n \n\n\n\n In volume 2019-January, pages 4595 - 4598, Yokohama, Japan, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"ValidationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20213510842569 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Validation and comparison of cropland leaf area index retrievals from sentinel-2/MSI data using SL2P processor and vegetation indices models},\njournal = {International Geoscience and Remote Sensing Symposium (IGARSS)},\nauthor = {Djamai, Najib and Fernandes, Richard and Weiss, Marie and McNairn, Heather and Goita, Kalifa},\nvolume = {2019-January},\nyear = {2019},\npages = {4595 - 4598},\naddress = {Yokohama, Japan},\nabstract = {<div data-language="eng" data-ev-field="abstract">Leaf area index (LAI) measurements acquired during the SMAP Validation Experiment 2016 in Manitoba (SMAPVEX16-MB) field campaign were used to validate LAI estimates from Sentinel-2/MSI data using The Simplified Level 2 Product Prototype Processor (SL2P) processor and LAI estimates obtained from locally calibrated vegetation indices (VI) models. Results showed that performances of LAI/SL2P estimates (RMSE = 0.98, bias = - 0.37, slope = 0.70), when compared to in-situ data, are lower than performances of LAI/VI estimates (RMSE = 0.38, bias = 0.19, slope = 0.75) when compared to the same in-situ data.<br/></div> © 2019 IEEE.},\nkey = {Vegetation},\n%keywords = {Remote sensing;Geology;},\n%note = {Field campaign;In-situ data;Leaf Area Index;Level 2;Manitoba;Product prototype;Vegetation index;},\nURL = {http://dx.doi.org/10.1109/IGARSS.2019.8900557},\n} \n\n\n
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Leaf area index (LAI) measurements acquired during the SMAP Validation Experiment 2016 in Manitoba (SMAPVEX16-MB) field campaign were used to validate LAI estimates from Sentinel-2/MSI data using The Simplified Level 2 Product Prototype Processor (SL2P) processor and LAI estimates obtained from locally calibrated vegetation indices (VI) models. Results showed that performances of LAI/SL2P estimates (RMSE = 0.98, bias = - 0.37, slope = 0.70), when compared to in-situ data, are lower than performances of LAI/VI estimates (RMSE = 0.38, bias = 0.19, slope = 0.75) when compared to the same in-situ data.
© 2019 IEEE.\n
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\n \n\n \n \n \n \n \n \n Crop phenology retrieval from polarimetric decomposition and random forest algorithm during SMAPVEX16-MB campaign.\n \n \n \n \n\n\n \n Wang, H.; Magagi, R.; Goita, K.; Trudel, M.; McNairn, H.; and Powers, J.\n\n\n \n\n\n\n In volume 2019-July, pages 7204 - 7207, Yokohama, Japan, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"CropPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20213610850234 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Crop phenology retrieval from polarimetric decomposition and random forest algorithm during SMAPVEX16-MB campaign},\njournal = {International Geoscience and Remote Sensing Symposium (IGARSS)},\nauthor = {Wang, Hongquan and Magagi, Ramata and Goita, Kalifa and Trudel, Melanie and McNairn, Heather and Powers, Jarrett},\nvolume = {2019-July},\nyear = {2019},\npages = {7204 - 7207},\naddress = {Yokohama, Japan},\nabstract = {<div data-language="eng" data-ev-field="abstract">The objective of this study is to investigate the retrieval of crop phenology using polarimetric decompositions and Random Forest (RF) algorithms. To realize this objective, we used multi-temporal RADARSAT-2 data and ground measured vegetation characteristics acquired during the SMAPVEX16-MB (Soil Moisture Active Passive Validation Experiment 2016 in Manitoba) campaign in Canada. Polarimetric parameters with the potential to quantify the volume scattering mechanism were extracted, and then analyzed with respect to ground identified phenology for different crop types. The RF algorithm was subsequently trained based on 60% of the data, and validated using the remaining data. Results show that the crop phenology can be monitored, through the combination of multiple polarimetric parameters to build different decision trees in the RF algorithm. By averaging the estimates from multiple decision trees, the complex relative patterns between the polarimetric parameters and crop phenology were recognized, leading to appropriate estimations on crop phenology. The obtained spearman correlation coefficients between the retrieved and ground identified crop phenology were 0.94, 0.91, 0.81 and 0.89 for canola, corn, soybean and wheat, respectively. This study also suggests suitable polarimetric parameters for a timely monitoring of crop phenology.<br/></div> ©2019 IEEE},\nkey = {Soil moisture},\n%keywords = {Crops;Decision trees;Remote sensing;Polarimeters;Forestry;Biology;Parameter estimation;},\n%note = {Crop phenology;Multi-temporal;Polarimetric decomposition;Polarimetric parameters;Radarsat-2;Random forest algorithm;Spearman correlation coefficients;Volume scattering;},\nURL = {http://dx.doi.org/10.1109/IGARSS.2019.8900385},\n} \n\n\n
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\n
The objective of this study is to investigate the retrieval of crop phenology using polarimetric decompositions and Random Forest (RF) algorithms. To realize this objective, we used multi-temporal RADARSAT-2 data and ground measured vegetation characteristics acquired during the SMAPVEX16-MB (Soil Moisture Active Passive Validation Experiment 2016 in Manitoba) campaign in Canada. Polarimetric parameters with the potential to quantify the volume scattering mechanism were extracted, and then analyzed with respect to ground identified phenology for different crop types. The RF algorithm was subsequently trained based on 60% of the data, and validated using the remaining data. Results show that the crop phenology can be monitored, through the combination of multiple polarimetric parameters to build different decision trees in the RF algorithm. By averaging the estimates from multiple decision trees, the complex relative patterns between the polarimetric parameters and crop phenology were recognized, leading to appropriate estimations on crop phenology. The obtained spearman correlation coefficients between the retrieved and ground identified crop phenology were 0.94, 0.91, 0.81 and 0.89 for canola, corn, soybean and wheat, respectively. This study also suggests suitable polarimetric parameters for a timely monitoring of crop phenology.
©2019 IEEE\n
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\n \n\n \n \n \n \n \n \n Performance Studies of Microbial Induced Calcite Precipitation to Prevent the Erosion of Internally Unstable Granular Soils.\n \n \n \n \n\n\n \n Haouzi, F.; Esnault-Filet, A.; and Courcelles, B.\n\n\n \n\n\n\n In pages 37 - 49, HangZhou, China, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"PerformancePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20210909986242 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance Studies of Microbial Induced Calcite Precipitation to Prevent the Erosion of Internally Unstable Granular Soils},\njournal = {Sustainable Civil Infrastructures},\nauthor = {Haouzi, Fatima-Zahra and Esnault-Filet, Annette and Courcelles, Benoit},\nyear = {2019},\npages = {37 - 49},\nissn = {23663405},\naddress = {HangZhou, China},\nabstract = {<div data-language="eng" data-ev-field="abstract">Migration of fine particles within internally unstable granular soils under water seepage flow (suffusion) is one of the most common causes of earth infrastructures’ failure. To assess the ability of Microbial Induced Calcite Precipitation (MICP) to prevent the segregation in an internally unstable soil, internal erosion tests were conducted upon soil samples treated by bacteria and cementation solutions. MICP experiments were carried out with concentrations of urea/CaCl<inf>2</inf> equal to 1.4 M. Volumes of injected bacteria solutions were equal to the volumetric water content corresponding to different tested degrees of saturation (S<inf>r</inf>): 30, 60 and 80%. Cementation solutions were injected three times for each sample. Biochemical properties of MICP were examined to predict bacterial movement through soil matrices as a function of S<inf>r</inf>. The amount of the CaCO<inf>3</inf> produced was examined depending on S<inf>r</inf>. Following their treatment, samples were saturated and submitted to increment of hydraulic gradients varying from 0.1 to 10. Eroded fine particles masses, seepage flow rates and effective hydraulic gradients along samples were measured throughout the experiment. The results of our study pointed out that MICP stabilized internally unstable granular soils as the critical gradient went from 0.7 for untreated samples to 5 for biocemented samples.<br/></div> © 2019, Springer International Publishing AG, part of Springer Nature.},\nkey = {Urea},\n%keywords = {Calcite;Cementing (shafts);Soils;Seepage;Soil testing;Bacteria;Calcium carbonate;Erosion;},\n%note = {Biochemical properties;Calcite precipitation;Critical gradient;Fine particles;Hydraulic gradients;Internal erosion;Performance study;Volumetric water content;},\nURL = {http://dx.doi.org/10.1007/978-3-319-96241-2_4},\n} \n\n\n
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\n
Migration of fine particles within internally unstable granular soils under water seepage flow (suffusion) is one of the most common causes of earth infrastructures’ failure. To assess the ability of Microbial Induced Calcite Precipitation (MICP) to prevent the segregation in an internally unstable soil, internal erosion tests were conducted upon soil samples treated by bacteria and cementation solutions. MICP experiments were carried out with concentrations of urea/CaCl2 equal to 1.4 M. Volumes of injected bacteria solutions were equal to the volumetric water content corresponding to different tested degrees of saturation (Sr): 30, 60 and 80%. Cementation solutions were injected three times for each sample. Biochemical properties of MICP were examined to predict bacterial movement through soil matrices as a function of Sr. The amount of the CaCO3 produced was examined depending on Sr. Following their treatment, samples were saturated and submitted to increment of hydraulic gradients varying from 0.1 to 10. Eroded fine particles masses, seepage flow rates and effective hydraulic gradients along samples were measured throughout the experiment. The results of our study pointed out that MICP stabilized internally unstable granular soils as the critical gradient went from 0.7 for untreated samples to 5 for biocemented samples.
© 2019, Springer International Publishing AG, part of Springer Nature.\n
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\n \n\n \n \n \n \n \n \n .\n \n \n \n \n\n\n \n Roy, T. B.; Banerji, S.; Panigrahi, S. K.; Chourasia, A.; Tirca, L.; and Bagchi, A.\n\n\n \n\n\n\n Volume 11 . A novel method for vibration-based damage detection in structures using marginal hilbert spectrum, pages 1161 - 1172. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inbook{20201708520389 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A novel method for vibration-based damage detection in structures using marginal hilbert spectrum},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Roy, Timir Baran and Banerji, Srishti and Panigrahi, Soraj Kumar and Chourasia, Ajay and Tirca, Lucia and Bagchi, Ashutosh},\nvolume = {11},\nyear = {2019},\npages = {1161 - 1172},\nissn = {23662557},\nabstract = {This vibration-based method for Structural Health Monitoring (SHM) utilizes the dynamic response of a structure measured using a set of sensors to identify the modal properties and potential structural damage. Signal processing tools are widely used for analyzing and diagnosing these response signals. Change in the dynamic characteristics of a structure can provide an indication of damage. However, a direct comparison of the vibration signals or modal properties at different periods of time may not be sufficient to identify the damages and their locations. Therefore, it is important to analyze the vibration signals to extract the morphologies of the changes in these response signals and correlate them with the types, location and magnitude of structural damage. In the proposed method of damage detection, first, the response signals are decomposed into intrinsic mode functions (IMF) using empirical mode decomposition (EMD) technique. Those IMFs are then processed with Hilbert–Huang transform (HHT) to obtain their corresponding Hilbert spectra, which allows the estimation of the time-varying instantaneous properties of those response signals. Then a marginal Hilbert spectrum (MHS)-based technique has been applied on the Hilbert spectrum coefficients to calculate associated damage indices (DI). The proposed method was tested using experimental tests conducted on a cantilever steel beam prototype at the CBRI laboratory, Roorkee, India, and a three-storey steel frame at Concordia University, Canada. The damage locations were determined by comparing the DIs of the damaged steel beam and frame with that of the corresponding baseline (undamaged) structures.<br/> © 2019, Springer Nature Singapore Pte Ltd.},\nkey = {Empirical mode decomposition},\n%keywords = {Mathematical transformations;Vibration analysis;Damage detection;Location;Steel beams and girders;Structural health monitoring;},\n%note = {Damage index;Empirical Mode Decomposition;Hilbert spectrum;Intrinsic Mode functions;Structural health monitoring (SHM);},\nURL = {http://dx.doi.org/10.1007/978-981-13-0362-3_92},\n} \n\n\n
\n
\n\n\n
\n This vibration-based method for Structural Health Monitoring (SHM) utilizes the dynamic response of a structure measured using a set of sensors to identify the modal properties and potential structural damage. Signal processing tools are widely used for analyzing and diagnosing these response signals. Change in the dynamic characteristics of a structure can provide an indication of damage. However, a direct comparison of the vibration signals or modal properties at different periods of time may not be sufficient to identify the damages and their locations. Therefore, it is important to analyze the vibration signals to extract the morphologies of the changes in these response signals and correlate them with the types, location and magnitude of structural damage. In the proposed method of damage detection, first, the response signals are decomposed into intrinsic mode functions (IMF) using empirical mode decomposition (EMD) technique. Those IMFs are then processed with Hilbert–Huang transform (HHT) to obtain their corresponding Hilbert spectra, which allows the estimation of the time-varying instantaneous properties of those response signals. Then a marginal Hilbert spectrum (MHS)-based technique has been applied on the Hilbert spectrum coefficients to calculate associated damage indices (DI). The proposed method was tested using experimental tests conducted on a cantilever steel beam prototype at the CBRI laboratory, Roorkee, India, and a three-storey steel frame at Concordia University, Canada. The damage locations were determined by comparing the DIs of the damaged steel beam and frame with that of the corresponding baseline (undamaged) structures.
© 2019, Springer Nature Singapore Pte Ltd.\n
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\n \n\n \n \n \n \n \n \n .\n \n \n \n \n\n\n \n Stathopoulos, T.; and Alrawashdeh, H.\n\n\n \n\n\n\n Volume 27 . Urban Wind Energy: A Wind Engineering and Wind Energy Cross-Roads, pages 3 - 16. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"UrbanPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inbook{20201708519164 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Urban Wind Energy: A Wind Engineering and Wind Energy Cross-Roads},\njournal = {Lecture Notes in Civil Engineering},\nauthor = {Stathopoulos, T. and Alrawashdeh, H.},\nvolume = {27},\nyear = {2019},\npages = {3 - 16},\nissn = {23662557},\nabstract = {Renewable energy reliance and the need to exploit renewable energy resources become an important focus of society. Wind engineering has developed significantly and has contributed to the study of significant aspects of wind energy, particularly in the area of the so-called urban wind energy. This review paper seeks to correlate the characteristics of wind engineering field and wind energy technology by analysing the contributions made in the areas of wind resource assessment in urban areas; examining the current practices in the utilization of wind turbine technologies and future prospects; as well as discussing the attempts to optimize the performance of microgeneration in the urban environment.<br/> © 2019, Springer Nature Switzerland AG.},\nkey = {Wind turbines},\n%keywords = {Wind power;},\n%note = {Current practices;Renewable energies;Urban energy;Urban environments;Wind energy technology;Wind engineering;Wind resource assessment;Wind turbine technology;},\nURL = {http://dx.doi.org/10.1007/978-3-030-12815-9_1},\n} \n\n\n
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\n Renewable energy reliance and the need to exploit renewable energy resources become an important focus of society. Wind engineering has developed significantly and has contributed to the study of significant aspects of wind energy, particularly in the area of the so-called urban wind energy. This review paper seeks to correlate the characteristics of wind engineering field and wind energy technology by analysing the contributions made in the areas of wind resource assessment in urban areas; examining the current practices in the utilization of wind turbine technologies and future prospects; as well as discussing the attempts to optimize the performance of microgeneration in the urban environment.
© 2019, Springer Nature Switzerland AG.\n
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\n \n\n \n \n \n \n \n The effectiveness of distributed tuned mass damper integrated with adaptive MR damper in building.\n \n \n \n\n\n \n Bagchi, A.; and Torkaman Rashid, A.\n\n\n \n\n\n\n In pages 21 - 22, Montreal, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20201308355227 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {The effectiveness of distributed tuned mass damper integrated with adaptive MR damper in building},\njournal = {Proceedings of 30th International Conference on Adaptive Structures and Technologies, ICAST 2019},\nauthor = {Bagchi, A. and Torkaman Rashid, A.},\nyear = {2019},\npages = {21 - 22},\naddress = {Montreal, QC, Canada},\nabstract = {Energy dissipation devices are utilized in buildings to improve their resilience and safety against dynamic forces such as seismic loads. Since the most commonly used passive dampers have operational limitations due to lack of control on their performance, in recent years, engineers tend to employ adaptive hybrid dampers which could be adjusted according to the seismic demands. In this research, seismic behavior of a fifteen story building equipped with 3 tuned mass dampers (TMD) is investigated and compared with the seismic response of the same building in which 3 magnetorheological dampers (MR) are paired with the TMDs to operate concurrently with them as hybrid energy dissipating system. The MR dampers are commanded by a linear quadratic regression (LQR) control method which adjust the dampers resistance force according to the seismic displacement and velocity of the structure. This building is subjected to 5 far field earthquake records and the results display that the hybrid system can perform considerably better than passive TMDs improving the seismic demands of the structure.<br/> © copyright Environment and Climate Change Canada.},\nkey = {Buildings},\n%keywords = {Acoustic devices;Energy dissipation;Hybrid systems;Seismic response;Damping;Behavioral research;Earthquakes;},\n%note = {Earthquake records;Energy dissipation devices;Linear quadratic;Magneto-rheological dampers;Resistance force;Seismic behavior;Seismic displacement;Tuned mass dampers;},\n} \n\n\n
\n
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\n Energy dissipation devices are utilized in buildings to improve their resilience and safety against dynamic forces such as seismic loads. Since the most commonly used passive dampers have operational limitations due to lack of control on their performance, in recent years, engineers tend to employ adaptive hybrid dampers which could be adjusted according to the seismic demands. In this research, seismic behavior of a fifteen story building equipped with 3 tuned mass dampers (TMD) is investigated and compared with the seismic response of the same building in which 3 magnetorheological dampers (MR) are paired with the TMDs to operate concurrently with them as hybrid energy dissipating system. The MR dampers are commanded by a linear quadratic regression (LQR) control method which adjust the dampers resistance force according to the seismic displacement and velocity of the structure. This building is subjected to 5 far field earthquake records and the results display that the hybrid system can perform considerably better than passive TMDs improving the seismic demands of the structure.
© copyright Environment and Climate Change Canada.\n
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\n \n\n \n \n \n \n \n System identification of concordia university EV building by operational modal analysis.\n \n \n \n\n\n \n Bagchi, S.; Sabamehr, A.; Roy, T. B.; and Bagchi, A.\n\n\n \n\n\n\n In pages 127 - 128, Montreal, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201308355086 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {System identification of concordia university EV building by operational modal analysis},\njournal = {Proceedings of 30th International Conference on Adaptive Structures and Technologies, ICAST 2019},\nauthor = {Bagchi, Saikat and Sabamehr, Ardalan and Roy, Timir Baran and Bagchi, Ashutosh},\nyear = {2019},\npages = {127 - 128},\naddress = {Montreal, QC, Canada},\nabstract = {Identification of the behavior of structural system and the monitoring of its structural health is essential for any smart and sustainable city. Montreal being one of the premier urban destinations situated at one of the extreme locations on earth, calls for such facilities to have installed for its important structural systems to obtain real-time information about the state of functionality of the structure. In this study, the EV Building of Concordia University (SGW Campus, Montreal, Canada) is studied using Operational Modal Analysis to comprehend the behavior of its two sub-systems. Frequency Domain Decomposition (FDD) technique is employed to extract the modal information.<br/> © copyright Environment and Climate Change Canada.},\nkey = {Real time systems},\n%keywords = {Frequency domain analysis;Modal analysis;Domain decomposition methods;Structural health monitoring;},\n%note = {Concordia University;Frequency domain decomposition;Montreal , Canada;Operational modal analysis;Real-time information;Structural health;Structural systems;Sustainable cities;},\n} \n\n\n
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\n Identification of the behavior of structural system and the monitoring of its structural health is essential for any smart and sustainable city. Montreal being one of the premier urban destinations situated at one of the extreme locations on earth, calls for such facilities to have installed for its important structural systems to obtain real-time information about the state of functionality of the structure. In this study, the EV Building of Concordia University (SGW Campus, Montreal, Canada) is studied using Operational Modal Analysis to comprehend the behavior of its two sub-systems. Frequency Domain Decomposition (FDD) technique is employed to extract the modal information.
© copyright Environment and Climate Change Canada.\n
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\n \n\n \n \n \n \n \n Automated visual assessment of structural conditions by FE model updating using Building Information Modeling (BIM).\n \n \n \n\n\n \n Bahmanoo, S.; Valinejadshoubi, M.; Sakib, F.; Sabamehr, A.; Bagchi, A.; and Bhowmick, A.\n\n\n \n\n\n\n In pages 119 - 120, Montreal, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201308355082 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Automated visual assessment of structural conditions by FE model updating using Building Information Modeling (BIM)},\njournal = {Proceedings of 30th International Conference on Adaptive Structures and Technologies, ICAST 2019},\nauthor = {Bahmanoo, S. and Valinejadshoubi, M. and Sakib, F.A. and Sabamehr, A. and Bagchi, A. and Bhowmick, A.},\nyear = {2019},\npages = {119 - 120},\naddress = {Montreal, QC, Canada},\nabstract = {Vibration-Based Damage Identification (VBDI) is an important class of techniques used for Structural Health Monitoring (SHM) of aerospace, civil and mechanical engineering structures. According to VBDI premise, the deviation in structural properties such as mass, stiffness and damping ratio could be associated by adverse changes on global vibrational response of structure as an indication of damage. Thus, finite element model updating technique has been widely adopted as a part of VBDI process to obtain and evaluate up-to-date structure model, structural properties and performance. However, using a visual data management system to collect and categorize the updated structural properties as well as the corresponding global vibration signatures such as natural frequencies and mode shapes in subsequent states is yet to be fully realized. Therefore, utilizing Building Information Modeling (BIM) as an integrated data management system would be a great step towards enhancing the efficiency of finite model updating technique in terms of data presentation and decision making. In this study a vibration-based SHM framework is demonstrated through adopting a FE model of a 4-story steel frame as the case study.<br/> © copyright Environment and Climate Change Canada.},\nkey = {Decision making},\n%keywords = {Finite element method;Information theory;Structural properties;Information management;Vibrations (mechanical);Architectural design;Damage detection;Structural health monitoring;},\n%note = {Building Information Model - BIM;Finite-element model updating;Integrated data management;Natural frequencies and modes;Stiffness and damping;Structural health monitoring (SHM);Vibration based damage identifications;Vibrational response;},\n} \n\n\n
\n
\n\n\n
\n Vibration-Based Damage Identification (VBDI) is an important class of techniques used for Structural Health Monitoring (SHM) of aerospace, civil and mechanical engineering structures. According to VBDI premise, the deviation in structural properties such as mass, stiffness and damping ratio could be associated by adverse changes on global vibrational response of structure as an indication of damage. Thus, finite element model updating technique has been widely adopted as a part of VBDI process to obtain and evaluate up-to-date structure model, structural properties and performance. However, using a visual data management system to collect and categorize the updated structural properties as well as the corresponding global vibration signatures such as natural frequencies and mode shapes in subsequent states is yet to be fully realized. Therefore, utilizing Building Information Modeling (BIM) as an integrated data management system would be a great step towards enhancing the efficiency of finite model updating technique in terms of data presentation and decision making. In this study a vibration-based SHM framework is demonstrated through adopting a FE model of a 4-story steel frame as the case study.
© copyright Environment and Climate Change Canada.\n
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\n \n\n \n \n \n \n \n Estimation of the capacity of a bridge deck and the bridge superstructure system based on ground penetrating radar imaging.\n \n \n \n\n\n \n Donda, D.; Ghodoosi, F.; and Bagchi, A.\n\n\n \n\n\n\n In pages 117 - 118, Montreal, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201308355081 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Estimation of the capacity of a bridge deck and the bridge superstructure system based on ground penetrating radar imaging},\njournal = {Proceedings of 30th International Conference on Adaptive Structures and Technologies, ICAST 2019},\nauthor = {Donda, Dipesh and Ghodoosi, Farzad and Bagchi, Ashutosh},\nyear = {2019},\npages = {117 - 118},\naddress = {Montreal, QC, Canada},\nabstract = {The load carrying capacity of the bridge reduces with time, both in shear and flexure. Such capacity reduction is due to the deterioration of concrete and steel reinforcement in reinforced concrete bridges. Corrosion of steel reinforcement results in cracks, concrete delamination, and spall. Identifying the deterioration pattern of a bridge deck helps decision-makers to come up with cost-effective repair schedules. The existing Bridge Management Systems (BMSs) such as BRIDGIT, POINTIS, and MTQ rating system are based on subjective visual inspections. The visual inspection of reinforced concrete bridges often results in an inaccurate condition assessment. Moreover, the traditional approach in Bridge Management Systems includes the deterioration of a bridge at the element level. Due to the redundancy and load redistribution, the actual system capacity is larger than the element capacity. Due to the development of the NonDestructive Testing (NDT) methods, the actual deteriorated condition of the bridge could be assessed more accurately. The objective of this research is to analyze the capacity of the bridge using the Ground Penetration Radar (GPR) image. Here, the deck GPR map is used to analyze the actual flexural and shear capacity of the bridge deck, and the whole superstructure as a system. The GPR map is further used to simulate the possible deterioration patterns, to analyze the components of the bridge and to estimate the capacity of the entire bridge system. Here, the comparison is to be made between the capacity of the bridge deck elements and the superstructure system for different types of deterioration pattern. The proposed method will be useful for determining the capacity of a bridge for different time intervals by using the deterioration prediction curves. This approach will be useful in determining the degree of repairs needed for the deck elements from the deterioration model with time.<br/> © copyright Environment and Climate Change Canada.},\nkey = {Deterioration},\n%keywords = {Geological surveys;Decision making;Bridge decks;Concrete bridges;Cost effectiveness;Geophysical prospecting;Radar imaging;Steel corrosion;Nondestructive examination;Ground penetrating radar systems;Reinforced concrete;},\n%note = {Bridge management system;Concrete delamination;Condition assessments;Deterioration modeling;Deterioration prediction;Ground penetrating radar imaging;Ground Penetration Radar;Traditional approaches;},\n} \n\n\n
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\n The load carrying capacity of the bridge reduces with time, both in shear and flexure. Such capacity reduction is due to the deterioration of concrete and steel reinforcement in reinforced concrete bridges. Corrosion of steel reinforcement results in cracks, concrete delamination, and spall. Identifying the deterioration pattern of a bridge deck helps decision-makers to come up with cost-effective repair schedules. The existing Bridge Management Systems (BMSs) such as BRIDGIT, POINTIS, and MTQ rating system are based on subjective visual inspections. The visual inspection of reinforced concrete bridges often results in an inaccurate condition assessment. Moreover, the traditional approach in Bridge Management Systems includes the deterioration of a bridge at the element level. Due to the redundancy and load redistribution, the actual system capacity is larger than the element capacity. Due to the development of the NonDestructive Testing (NDT) methods, the actual deteriorated condition of the bridge could be assessed more accurately. The objective of this research is to analyze the capacity of the bridge using the Ground Penetration Radar (GPR) image. Here, the deck GPR map is used to analyze the actual flexural and shear capacity of the bridge deck, and the whole superstructure as a system. The GPR map is further used to simulate the possible deterioration patterns, to analyze the components of the bridge and to estimate the capacity of the entire bridge system. Here, the comparison is to be made between the capacity of the bridge deck elements and the superstructure system for different types of deterioration pattern. The proposed method will be useful for determining the capacity of a bridge for different time intervals by using the deterioration prediction curves. This approach will be useful in determining the degree of repairs needed for the deck elements from the deterioration model with time.
© copyright Environment and Climate Change Canada.\n
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\n \n\n \n \n \n \n \n The influence of GFRP web reinforcement on the structural behaviour of deep beams.\n \n \n \n\n\n \n Latosh, F.; and Bagchi, A.\n\n\n \n\n\n\n In pages 143 - 144, Montreal, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201308355094 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {The influence of GFRP web reinforcement on the structural behaviour of deep beams},\njournal = {Proceedings of 30th International Conference on Adaptive Structures and Technologies, ICAST 2019},\nauthor = {Latosh, Fawzi and Bagchi, Ashutosh},\nyear = {2019},\npages = {143 - 144},\naddress = {Montreal, QC, Canada},\nabstract = {Fiber Reinforced Polymer (FRP) materials are a strong material, light and free of corrosion problem and therefore being used alternatively of steel reinforcements in concrete structural elements. Many studies have investigated the effectiveness of longitudinal FRP bars, but not many studies are available on the efficiency of the FRP web reinforcements in concrete deep beams. A set of four Glass Fiber Reinforced Polymer (GFRP) Reinforced Concrete deep beam with a shear span-to-depth ratio equal to one and a different aspect ratio of web reinforcement were tested to observe their behavior. The study demonstrates the importance of the web reinforcements in controlling the overall behavior of reinforced concrete deep beams for example the mid-span deflection, crack width, failure modes and ultimate strengths. In addition, this study developed a new equation to predict the contribution of the FRP web reinforcements to the ultimate shear capacity of FRP-reinforced concrete deep beams.<br/> © copyright Environment and Climate Change Canada.},\nkey = {Aspect ratio},\n%keywords = {Steel corrosion;Steel fibers;Concrete beams and girders;Fiber reinforced plastics;Reinforced concrete;},\n%note = {Concrete deep beams;Fiber reinforced polymers;Glass fiber reinforced polymer;Reinforced concrete deep beams;Shear span-to-depth ratios;Steel reinforcements;Structural behaviour;Ultimate shear capacities;},\n} \n\n\n
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\n Fiber Reinforced Polymer (FRP) materials are a strong material, light and free of corrosion problem and therefore being used alternatively of steel reinforcements in concrete structural elements. Many studies have investigated the effectiveness of longitudinal FRP bars, but not many studies are available on the efficiency of the FRP web reinforcements in concrete deep beams. A set of four Glass Fiber Reinforced Polymer (GFRP) Reinforced Concrete deep beam with a shear span-to-depth ratio equal to one and a different aspect ratio of web reinforcement were tested to observe their behavior. The study demonstrates the importance of the web reinforcements in controlling the overall behavior of reinforced concrete deep beams for example the mid-span deflection, crack width, failure modes and ultimate strengths. In addition, this study developed a new equation to predict the contribution of the FRP web reinforcements to the ultimate shear capacity of FRP-reinforced concrete deep beams.
© copyright Environment and Climate Change Canada.\n
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\n \n\n \n \n \n \n \n Vibration-based damage detection in a cable-stayed bridge.\n \n \n \n\n\n \n Momeni, Z.; and Bagchi, A.\n\n\n \n\n\n\n In pages 125 - 126, Montreal, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201308355085 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Vibration-based damage detection in a cable-stayed bridge},\njournal = {Proceedings of 30th International Conference on Adaptive Structures and Technologies, ICAST 2019},\nauthor = {Momeni, Zahrasadat and Bagchi, Ashutosh},\nyear = {2019},\npages = {125 - 126},\naddress = {Montreal, QC, Canada},\n} \n\n\n
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\n \n\n \n \n \n \n \n \n Soil Moisture Estimation from Smap Observations Using Long Short- Term Memory (LSTM).\n \n \n \n \n\n\n \n Abbes, A. B.; Magagi, R.; and Goita, K.\n\n\n \n\n\n\n In pages 1590 - 1593, Yokohama, Japan, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"SoilPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20200208024968 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Soil Moisture Estimation from Smap Observations Using Long Short- Term Memory (LSTM)},\njournal = {International Geoscience and Remote Sensing Symposium (IGARSS)},\nauthor = {Abbes, Ali Ben and Magagi, Ramata and Goita, Kalifa},\nyear = {2019},\npages = {1590 - 1593},\naddress = {Yokohama, Japan},\nabstract = {Soil Moisture (SM) estimation is of growing interest. In the recent years, different Machine Learning (ML) methods were developed in order to better understand the spatio-temporal variability of SM. Among the different ML methods, neural networks were the most used for SM estimation. The purpose of this paper is to propose a Long Short-Term Memory (LSTM) based methodology to estimate the SM. The input data used in the LSTM model include the Soil Moisture Active and Passive mission (SMAP) Brightness Temperature (TB), the Moderate Resolution Imaging Spectroradiometer Vegetation Water Content (MODIS-VWC) and the soil temperature. The target SM data used to train the LSTM model is provided by the Real-time In situ Soil Monitoring for Agriculture (RISMA) network installed by Agriculture and Agri-Food Canada (AAFC). LSTM shows good ability to estimate the SM values with good accuracy.<br/> © 2019 IEEE.},\nkey = {Long short-term memory},\n%keywords = {Radiometers;Brain;Agriculture;Water content;Remote sensing;Temperature;Soil moisture;},\n%note = {Brightness temperatures;Moderate resolution imaging spectroradiometer;MODIS;SMAP;Soil moisture estimation;Soil temperature;Spatiotemporal variability;Vegetation water content;},\nURL = {http://dx.doi.org/10.1109/IGARSS.2019.8898418},\n} \n\n\n
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\n Soil Moisture (SM) estimation is of growing interest. In the recent years, different Machine Learning (ML) methods were developed in order to better understand the spatio-temporal variability of SM. Among the different ML methods, neural networks were the most used for SM estimation. The purpose of this paper is to propose a Long Short-Term Memory (LSTM) based methodology to estimate the SM. The input data used in the LSTM model include the Soil Moisture Active and Passive mission (SMAP) Brightness Temperature (TB), the Moderate Resolution Imaging Spectroradiometer Vegetation Water Content (MODIS-VWC) and the soil temperature. The target SM data used to train the LSTM model is provided by the Real-time In situ Soil Monitoring for Agriculture (RISMA) network installed by Agriculture and Agri-Food Canada (AAFC). LSTM shows good ability to estimate the SM values with good accuracy.
© 2019 IEEE.\n
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\n \n\n \n \n \n \n \n Designing a traffic barrier anchorage system for aluminum bridge decking.\n \n \n \n\n\n \n Fafard, M.; Cormier, M.; and Annan, C.\n\n\n \n\n\n\n Light Metal Age, 77(5): 12 - 13. 2019.\n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20194907774430 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Designing a traffic barrier anchorage system for aluminum bridge decking},\njournal = {Light Metal Age},\nauthor = {Fafard, Mario and Cormier, Martin and Annan, Charles-Darwin},\nvolume = {77},\nnumber = {5},\nyear = {2019},\npages = {12 - 13},\nissn = {00243345},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper has presented a summary of a design procedure for attaching an already crash-tested traffic barrier to an aluminum decking using FEA. It has been demonstrated that it is possible to develop an aluminum fuse system that will undergo plastic deformation while preserving the aluminum decking against permanent deformations. As a result, the costly intervention of deck replacement, in whole or in part, upon vehicular impact on the barrier can be averted.<br/></div>},\nkey = {Aluminum},\n%keywords = {Aluminum bridges;Design;},\n%note = {Anchorage systems;Deck replacement;Design procedure;Permanent deformations;Vehicular impacts;},\n} \n\n\n
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This paper has presented a summary of a design procedure for attaching an already crash-tested traffic barrier to an aluminum decking using FEA. It has been demonstrated that it is possible to develop an aluminum fuse system that will undergo plastic deformation while preserving the aluminum decking against permanent deformations. As a result, the costly intervention of deck replacement, in whole or in part, upon vehicular impact on the barrier can be averted.
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\n \n\n \n \n \n \n \n \n Human Health and Ecosystem Impacts of Deep Decarbonization of the Energy System.\n \n \n \n \n\n\n \n Fernandez Astudillo, M.; Vaillancourt, K.; Pineau, P.; and Amor, B.\n\n\n \n\n\n\n Environmental Science and Technology, 53(23): 14054 - 14062. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"HumanPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20194807771765 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Human Health and Ecosystem Impacts of Deep Decarbonization of the Energy System},\njournal = {Environmental Science and Technology},\nauthor = {Fernandez Astudillo, Miguel and Vaillancourt, Kathleen and Pineau, Pierre-Olivier and Amor, Ben},\nvolume = {53},\nnumber = {23},\nyear = {2019},\npages = {14054 - 14062},\nissn = {0013936X},\nabstract = {Global warming mitigation strategies are likely to affect human health and biodiversity through diverse cause-effect mechanisms. To analyze these effects, we implement a methodology to link TIMES energy models with life cycle assessment using open-source software. The proposed method uses a cutoff to identify the most relevant processes. These processes have their efficiencies, fuel mixes, and emission factors updated to be consistent with the TIMES model. The use of a cutoff criterion reduces exponentially the number of connection points between models, facilitating the analysis of scenarios with a large number of technologies involved. The method is used to assess the potential effects of deploying low-carbon technologies to reduce combustion emissions in the province of Quebec (Canada). In the case of Quebec, the reduction of combustion emissions is largely achieved through electrification of energy services. Global warming mitigation efforts reduce the impact on human health and ecosystem quality, mainly because of lower global warming, water scarcity, and metal contamination impacts. The TIMES model alone underestimated the reduction of CO<inf>2eq</inf> by 21% with respect to a full account of emissions.<br/> Copyright © 2019 American Chemical Society.},\nkey = {Global warming},\n%keywords = {Life cycle;Combustion;Ecosystems;Health;Biodiversity;Open source software;Open systems;},\n%note = {Combustion emissions;Connection points;Emission factors;Life Cycle Assessment (LCA);Low-carbon technologies;Metal contamination;Mitigation strategy;Potential effects;},\nURL = {http://dx.doi.org/10.1021/acs.est.9b04923},\n} \n\n\n
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\n Global warming mitigation strategies are likely to affect human health and biodiversity through diverse cause-effect mechanisms. To analyze these effects, we implement a methodology to link TIMES energy models with life cycle assessment using open-source software. The proposed method uses a cutoff to identify the most relevant processes. These processes have their efficiencies, fuel mixes, and emission factors updated to be consistent with the TIMES model. The use of a cutoff criterion reduces exponentially the number of connection points between models, facilitating the analysis of scenarios with a large number of technologies involved. The method is used to assess the potential effects of deploying low-carbon technologies to reduce combustion emissions in the province of Quebec (Canada). In the case of Quebec, the reduction of combustion emissions is largely achieved through electrification of energy services. Global warming mitigation efforts reduce the impact on human health and ecosystem quality, mainly because of lower global warming, water scarcity, and metal contamination impacts. The TIMES model alone underestimated the reduction of CO2eq by 21% with respect to a full account of emissions.
Copyright © 2019 American Chemical Society.\n
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\n \n\n \n \n \n \n \n \n Seismic fragility analyses of steel building frames installed with superelastic shape memory alloy dampers: Comparison with yielding dampers.\n \n \n \n \n\n\n \n Gur, S.; Xie, Y.; and DesRoches, R.\n\n\n \n\n\n\n Journal of Intelligent Material Systems and Structures, 30(18-19): 2670 - 2687. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194207546629 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic fragility analyses of steel building frames installed with superelastic shape memory alloy dampers: Comparison with yielding dampers},\njournal = {Journal of Intelligent Material Systems and Structures},\nauthor = {Gur, Sourav and Xie, Yazhou and DesRoches, Reginald},\nvolume = {30},\nnumber = {18-19},\nyear = {2019},\npages = {2670 - 2687},\nissn = {1045389X},\nabstract = {Smart materials such as shape memory alloys have unique material properties that can potentially mitigate earthquake hazards on the built environment. Implementation of shape memory alloy-based devices on building structures should incorporate two key factors: (1) distinct mechanical features of the devices and (2) inherent large uncertainty stemming from material properties, building geometry, and ground motions. This study conducts seismic fragility analyses of steel building frames installed with superelastic shape memory alloy dampers, which enable both factors to be appropriately considered. First, a thermomechanical constitutive model is utilized to capture all essential characteristics of the shape memory alloy damper. Next, a probabilistic seismic analysis framework is developed to obtain the seismic demands of three critical engineering demand parameters (i.e. peak interstory drift ratio, residual drift ratio, and top floor acceleration) of the building when subjected to modeling uncertainty and a large set of realistic ground motion inputs. Nonlinear time history responses and the associated short-time Fourier transform demonstrate the superior control efficiency of the shape memory alloy damper in limiting the building’s residual drift and top floor acceleration. Furthermore, seismic fragilities of the buildings when installed with shape memory alloy dampers are compared with those when equipped with yielding dampers. The study indicates that under different levels of ground motions and various ranges of modeling uncertainty in structural parameters, shape memory alloy damper consistently outperforms the yielding damper in reducing the seismic fragility of the building at both component and system levels.<br/> © The Author(s) 2019.},\nkey = {Buildings},\n%keywords = {Floors;Uncertainty analysis;Mathematical transformations;Shape-memory alloy;Seismic response;},\n%note = {Engineering demand parameters;Model uncertainties;Seismic fragility;Short time Fourier transforms;Steel buildings;Superelastic shape memory alloy;Thermo-mechanical constitutive model;yielding damper;},\nURL = {http://dx.doi.org/10.1177/1045389X19873408},\n} \n\n\n
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\n Smart materials such as shape memory alloys have unique material properties that can potentially mitigate earthquake hazards on the built environment. Implementation of shape memory alloy-based devices on building structures should incorporate two key factors: (1) distinct mechanical features of the devices and (2) inherent large uncertainty stemming from material properties, building geometry, and ground motions. This study conducts seismic fragility analyses of steel building frames installed with superelastic shape memory alloy dampers, which enable both factors to be appropriately considered. First, a thermomechanical constitutive model is utilized to capture all essential characteristics of the shape memory alloy damper. Next, a probabilistic seismic analysis framework is developed to obtain the seismic demands of three critical engineering demand parameters (i.e. peak interstory drift ratio, residual drift ratio, and top floor acceleration) of the building when subjected to modeling uncertainty and a large set of realistic ground motion inputs. Nonlinear time history responses and the associated short-time Fourier transform demonstrate the superior control efficiency of the shape memory alloy damper in limiting the building’s residual drift and top floor acceleration. Furthermore, seismic fragilities of the buildings when installed with shape memory alloy dampers are compared with those when equipped with yielding dampers. The study indicates that under different levels of ground motions and various ranges of modeling uncertainty in structural parameters, shape memory alloy damper consistently outperforms the yielding damper in reducing the seismic fragility of the building at both component and system levels.
© The Author(s) 2019.\n
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\n \n\n \n \n \n \n \n \n Two-dimensional sub-aerial, submerged, and transitional granular slides.\n \n \n \n \n\n\n \n Pilvar, M.; Pouraghniaei, M.; and Shakibaeinia, A.\n\n\n \n\n\n\n Physics of Fluids, 31(11). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Two-dimensionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20194807766941 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Two-dimensional sub-aerial, submerged, and transitional granular slides},\njournal = {Physics of Fluids},\nauthor = {Pilvar, M. and Pouraghniaei, M.J. and Shakibaeinia, A.},\nvolume = {31},\nnumber = {11},\nyear = {2019},\nissn = {10706631},\nabstract = {The slide of granular material in nature and engineering can happen under air (subaerial), under a liquidlike water (submerged), or a transition between these two regimes, where a subaerial slide enters a liquid and becomes submerged. Here, we experimentally investigate these three slide regimes (i.e., subaerial, submerged, and transitional) in two dimensions, for various slope angles, material types, and bed roughness. The goal is to shed light on the complex morphodynamics and flow structure of these granular flows and also to provide comprehensive benchmarks for the validation and parametrization of the numerical models. The slide regime is found to be a major controller of the granular morphodynamics (e.g., shape evolution and internal flow structure). The time history of the runout distance for the subaerial and submerged cases present a similar three-phase trend (with acceleration, steady flow, and deceleration phases) tough with different spatiotemporal scales. Compared to the subaerial cases, the submerged cases show longer runout time and shorter final runout distances. The transitional trends, however, show additional deceleration and reacceleration. The observations suggest that the impact of slide angle, material type, and bed roughness on the morphodynamics is less significant where the material interacts with water. Flow structure, extracted using a granular particle image velocimetry technique, shows a relatively power-law velocity profile for the subaerial condition and strong circulations for the submerged condition. An unsteady theoretical model based on the μ(I) rheology is developed and is shown to be effective in the prediction of the average velocity of the granular mass.<br/> © 2019 Author(s).},\nkey = {Flow structure},\n%keywords = {Granular materials;Antennas;Velocity measurement;},\n%note = {Average velocity;Granular particles;Internal flow structure;Parametrizations;Spatio-temporal scale;Submerged condition;Theoretical modeling;Velocity profiles;},\nURL = {http://dx.doi.org/10.1063/1.5121881},\n} \n\n\n
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\n The slide of granular material in nature and engineering can happen under air (subaerial), under a liquidlike water (submerged), or a transition between these two regimes, where a subaerial slide enters a liquid and becomes submerged. Here, we experimentally investigate these three slide regimes (i.e., subaerial, submerged, and transitional) in two dimensions, for various slope angles, material types, and bed roughness. The goal is to shed light on the complex morphodynamics and flow structure of these granular flows and also to provide comprehensive benchmarks for the validation and parametrization of the numerical models. The slide regime is found to be a major controller of the granular morphodynamics (e.g., shape evolution and internal flow structure). The time history of the runout distance for the subaerial and submerged cases present a similar three-phase trend (with acceleration, steady flow, and deceleration phases) tough with different spatiotemporal scales. Compared to the subaerial cases, the submerged cases show longer runout time and shorter final runout distances. The transitional trends, however, show additional deceleration and reacceleration. The observations suggest that the impact of slide angle, material type, and bed roughness on the morphodynamics is less significant where the material interacts with water. Flow structure, extracted using a granular particle image velocimetry technique, shows a relatively power-law velocity profile for the subaerial condition and strong circulations for the submerged condition. An unsteady theoretical model based on the μ(I) rheology is developed and is shown to be effective in the prediction of the average velocity of the granular mass.
© 2019 Author(s).\n
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\n \n\n \n \n \n \n \n \n Practical considerations for array-based surface-wave testing methods with respect to near-field effects and shear-wave velocity profiles.\n \n \n \n \n\n\n \n Tremblay, S.; and Karray, M.\n\n\n \n\n\n\n Journal of Applied Geophysics, 171. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"PracticalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194407593379 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Practical considerations for array-based surface-wave testing methods with respect to near-field effects and shear-wave velocity profiles},\njournal = {Journal of Applied Geophysics},\nauthor = {Tremblay, Simon-Pierre and Karray, Mourad},\nvolume = {171},\nyear = {2019},\nissn = {09269851},\nabstract = {An important constraint with geophysical testing methods based on the propagation of surface waves (active surface wave testing methods) comes from the filtering criteria that are used to avoid near and far-field effects. Such criteria suggest the use of a large receiver spread length to calculate accurate dispersion curves. However, for geotechnical investigations, the use of such a wide array is at best not desirable due mainly to site constraints and to the nature of the soil profile whose dynamic properties tend to vary laterally. The effectiveness of using smaller arrays of receivers covering limited distances to calculate accurate Rayleigh-waves dispersion curves and shear-wave velocity profiles is investigated. The methods used to compute the phase velocities are based on both group and phase velocity estimates. It is shown that the proposed method reduces the effects of body waves and the possibility of mode misidentification in the near and far-fields even when a limited number of traces covering relatively small distances are used. Also, the properties of the signal processing technique used to calculate the dispersion curves are shown to have a significant impact on the near and far-field effects. Numerical and experimental data are used to show the potential benefits of using shorter arrays of receivers to characterize the properties of different soil profiles with laterally varying properties.<br/> © 2019},\nkey = {Surface waves},\n%keywords = {Shear waves;Acoustic wave velocity;Phase velocity;Modal analysis;Dispersion (waves);Soil testing;Soils;Shear flow;Signal processing;},\n%note = {Active surfaces;Mode misidentification;Multi-Modal Analysis of Surface Waves (MMASW);Near field effect;Spread length;},\nURL = {http://dx.doi.org/10.1016/j.jappgeo.2019.103871},\n} \n\n\n
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\n An important constraint with geophysical testing methods based on the propagation of surface waves (active surface wave testing methods) comes from the filtering criteria that are used to avoid near and far-field effects. Such criteria suggest the use of a large receiver spread length to calculate accurate dispersion curves. However, for geotechnical investigations, the use of such a wide array is at best not desirable due mainly to site constraints and to the nature of the soil profile whose dynamic properties tend to vary laterally. The effectiveness of using smaller arrays of receivers covering limited distances to calculate accurate Rayleigh-waves dispersion curves and shear-wave velocity profiles is investigated. The methods used to compute the phase velocities are based on both group and phase velocity estimates. It is shown that the proposed method reduces the effects of body waves and the possibility of mode misidentification in the near and far-fields even when a limited number of traces covering relatively small distances are used. Also, the properties of the signal processing technique used to calculate the dispersion curves are shown to have a significant impact on the near and far-field effects. Numerical and experimental data are used to show the potential benefits of using shorter arrays of receivers to characterize the properties of different soil profiles with laterally varying properties.
© 2019\n
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\n \n\n \n \n \n \n \n \n Introduction: Extending the Design Life of Structurally Deficient Steel and Composite Bridges.\n \n \n \n \n\n\n \n Rus Jenni, L.; and Annan, C.\n\n\n \n\n\n\n Structural Engineering International, 29(4): 506 - . 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Introduction:Paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20194707707916 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Introduction: Extending the Design Life of Structurally Deficient Steel and Composite Bridges},\njournal = {Structural Engineering International},\nauthor = {Rus Jenni, Laurent and Annan, Charles-Darwin},\nvolume = {29},\nnumber = {4},\nyear = {2019},\npages = {506 - },\nissn = {10168664},\nURL = {http://dx.doi.org/10.1080/10168664.2019.1678813},\n} \n\n\n
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\n \n\n \n \n \n \n \n \n Enhancing consistency in consequential life cycle inventory through material flow analysis.\n \n \n \n \n\n\n \n Cordier, S.; Robichaud, F.; Blanchet, P.; and Amor, B.\n\n\n \n\n\n\n In volume 323, pages BAUIMASSIVI; Beckhoff; et al.; Klima- und Energiefonds; Marienhutte; Wienerberger - , Rechbauerstrasse 12, Graz, Austria, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"EnhancingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20194107521645 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Enhancing consistency in consequential life cycle inventory through material flow analysis},\njournal = {IOP Conference Series: Earth and Environmental Science},\nauthor = {Cordier, S. and Robichaud, F. and Blanchet, P. and Amor, B.},\nvolume = {323},\nnumber = {1},\nyear = {2019},\npages = {BAUIMASSIVI; Beckhoff; et al.; Klima- und Energiefonds; Marienhutte; Wienerberger - },\nissn = {17551307},\naddress = {Rechbauerstrasse 12, Graz, Austria},\nabstract = {Wood products are gaining interest in the building sector, due to their potential in sequestering greenhouse gas emissions. However, increasing wood materials use in the built market can have unforeseen changes in the material supply chains. Consequential Life Cycle Assessment (CLCA) allows the assessment of changes in material supply chain. To quantify and link those consequences, the affected physical flows need to be estimated. Material Flow Analysis (MFA) can bring to CLCA modelling more representative and quantitative information than the commonly used hypothesis in consequential modelling. Indeed, MFA considers physical constraints (technology performances and material availability), in addition to account for mass balance. The main objective of this presentation is to illustrate how such consistency is added to CLCA through an MFA of wood products in non-residential (NR) buildings in the province of Québec (Canada). Wood flows are tracked to identify their end-use markets and trends in consumption. To overcome the lack of data and bring insights on the sector's dynamics, such as stock variations and potential discarded flows that supply recycling markets, residence time model and also extrapolation and correlation between physical and economic parameters are used. Results show how flows can increase in the market before reaching their physical constraints, such as the available wood stock in the forest. These insights will significantly enhance the data collection for CLCA. In conclusion, the MFA brings support to CLCA by proposing a framework to model changes in the construction market.<br/> © 2019 IOP Publishing Ltd. All rights reserved.},\nkey = {Wood products},\n%keywords = {Greenhouse gases;Commerce;Gas emissions;Supply chains;Life cycle;},\n%note = {Consequential life-cycle assessment;Life Cycle Inventory;Material availability;Material flow analysis;Material supply chains;Quantitative information;Residence time models;Technology performance;},\nURL = {http://dx.doi.org/10.1088/1755-1315/323/1/012056},\n} \n\n\n
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\n Wood products are gaining interest in the building sector, due to their potential in sequestering greenhouse gas emissions. However, increasing wood materials use in the built market can have unforeseen changes in the material supply chains. Consequential Life Cycle Assessment (CLCA) allows the assessment of changes in material supply chain. To quantify and link those consequences, the affected physical flows need to be estimated. Material Flow Analysis (MFA) can bring to CLCA modelling more representative and quantitative information than the commonly used hypothesis in consequential modelling. Indeed, MFA considers physical constraints (technology performances and material availability), in addition to account for mass balance. The main objective of this presentation is to illustrate how such consistency is added to CLCA through an MFA of wood products in non-residential (NR) buildings in the province of Québec (Canada). Wood flows are tracked to identify their end-use markets and trends in consumption. To overcome the lack of data and bring insights on the sector's dynamics, such as stock variations and potential discarded flows that supply recycling markets, residence time model and also extrapolation and correlation between physical and economic parameters are used. Results show how flows can increase in the market before reaching their physical constraints, such as the available wood stock in the forest. These insights will significantly enhance the data collection for CLCA. In conclusion, the MFA brings support to CLCA by proposing a framework to model changes in the construction market.
© 2019 IOP Publishing Ltd. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Light tunable azopolymers: Photomechanical phenomena and multifunctional materials.\n \n \n \n \n\n\n \n Fabbri, F.; Chevalier, S.; Lahlil, K.; Lefebvre, O.; Bouville, D.; Lassailly, Y.; Martinelli, L.; DucVu, A.; Gacoin, T.; Peretti, J.; Frech-Baronet, J.; Chen, Z.; Fafard, M.; and Sorelli, L.\n\n\n \n\n\n\n In Quebec City, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"LightPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20194007490943 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Light tunable azopolymers: Photomechanical phenomena and multifunctional materials},\njournal = {2019 Photonics North, PN 2019},\nauthor = {Fabbri, Filippo and Chevalier, Sylvain and Lahlil, Khalid and Lefebvre, Olivier and Bouville, David and Lassailly, Yves and Martinelli, Lucio and DucVu, Ahn and Gacoin, Thierry and Peretti, Jacques and Frech-Baronet, Jessy and Chen, Zhao and Fafard, Mario and Sorelli, Luca},\nyear = {2019},\naddress = {Quebec City, QC, Canada},\nabstract = {Light tunable materials such as azobenzene-containing polymers are nowadays a promising way to achieve optical control of matter up to the nanoscale. In particular, the materials’ optical and mechanical responses can be tuned by controlling the spatial and temporal distribution of the projected light field, which allows to achieve precise, reversible manipulation, in real-time, of the materials’ response. The understanding of the photomechanical phenomena occurring in azopolymers will be discussed as well as their applications as multifunctional materials.<br/> © 2019 IEEE.},\nkey = {Azobenzene},\n%keywords = {Sol-gels;Light;Na%notechnology;Plasmonics;},\n%note = {Local probes;Matter transport;Nano optics;Optical actuation;Optical tuning;Photo-softening;Photoactive polymers;},\nURL = {http://dx.doi.org/10.1109/PN.2019.8819540},\n} \n\n\n
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\n Light tunable materials such as azobenzene-containing polymers are nowadays a promising way to achieve optical control of matter up to the nanoscale. In particular, the materials’ optical and mechanical responses can be tuned by controlling the spatial and temporal distribution of the projected light field, which allows to achieve precise, reversible manipulation, in real-time, of the materials’ response. The understanding of the photomechanical phenomena occurring in azopolymers will be discussed as well as their applications as multifunctional materials.
© 2019 IEEE.\n
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\n \n\n \n \n \n \n \n \n Response of Metallic Sandwich Panels to Blast Loads.\n \n \n \n \n\n\n \n Ahmed, S.; and Galal, K.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 145(12). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ResponsePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20193907465844 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Response of Metallic Sandwich Panels to Blast Loads},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Ahmed, Sameh and Galal, Khaled},\nvolume = {145},\nnumber = {12},\nyear = {2019},\nissn = {07339445},\nabstract = {A considerable amount of research studies have demonstrated the capability of metallic sandwich panels in dissipating blast loading energy. Metallic sandwich panels dissipate blast energy through large plastic deformation of the core and plates, making them more effective than a single metallic plate of similar density. This study numerically evaluated the effectiveness of using woven shapes as a new core topology in sandwich panels for resisting blast loads. The results of the proposed woven shapes were compared to honeycomb and folded shapes to examine their effectiveness in blast mitigation. Numerical models were developed using ANSYS Autodyn software and were validated using available data in the literature. Eleven panels were studied: Three honeycomb panels, five folded panels, and three woven panels. The effect of changing the front layer's thickness and the back layer's thickness was investigated. A new scenario was investigated where the same sandwich panels were exposed to a second blast load following the first one. Finally, the effect of changing the charge weight was studied where parameter charts for the honeycomb topology, folded topology, and woven topology were developed. The results show that woven shapes achieved the best energy dissipation capability compared to the honeycomb and folded shapes. Moreover, woven shapes achieved less back layer deflection than the folded shapes and more back layer deflection than the honeycomb shapes.<br/> © 2019 American Society of Civil Engineers.},\nkey = {Topology},\n%keywords = {Energy dissipation;Dynamic loads;Finite element method;Metals;Sandwich structures;Honeycomb structures;},\n%note = {Blast loads;Folded;Honeycomb;Sandwich panel;Woven;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002397},\n} \n\n\n
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\n A considerable amount of research studies have demonstrated the capability of metallic sandwich panels in dissipating blast loading energy. Metallic sandwich panels dissipate blast energy through large plastic deformation of the core and plates, making them more effective than a single metallic plate of similar density. This study numerically evaluated the effectiveness of using woven shapes as a new core topology in sandwich panels for resisting blast loads. The results of the proposed woven shapes were compared to honeycomb and folded shapes to examine their effectiveness in blast mitigation. Numerical models were developed using ANSYS Autodyn software and were validated using available data in the literature. Eleven panels were studied: Three honeycomb panels, five folded panels, and three woven panels. The effect of changing the front layer's thickness and the back layer's thickness was investigated. A new scenario was investigated where the same sandwich panels were exposed to a second blast load following the first one. Finally, the effect of changing the charge weight was studied where parameter charts for the honeycomb topology, folded topology, and woven topology were developed. The results show that woven shapes achieved the best energy dissipation capability compared to the honeycomb and folded shapes. Moreover, woven shapes achieved less back layer deflection than the folded shapes and more back layer deflection than the honeycomb shapes.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Regionalised life cycle assessment of bio-based materials in construction; the case of hemp shiv treated with sol-gel coatings.\n \n \n \n \n\n\n \n Heidari, M. D.; Lawrence, M.; Blanchet, P.; and Amor, B.\n\n\n \n\n\n\n Materials, 12(18). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"RegionalisedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20193907472910 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Regionalised life cycle assessment of bio-based materials in construction; the case of hemp shiv treated with sol-gel coatings},\njournal = {Materials},\nauthor = {Heidari, Mohammad Davoud and Lawrence, Michael and Blanchet, Pierre and Amor, Ben},\nvolume = {12},\nnumber = {18},\nyear = {2019},\nissn = {19961944},\nabstract = {Interest in intrinsically low-energy construction materials is becoming mainstream, and bio-based materials form a key part of that group of materials. The goal of this study was to analyse the environmental impact of applying a sol-gel coating on hemp shiv, in order to improve the durability of this innovative bio-based material, using a regionalised LCA model, taking into account regional specific peculiarities. This study analysed the environmental performance of using bio-based materials in the building envelope compared with traditional synthetic construction materials, and compared the impact of a regionalised approach with a global approach. The carbon footprint of treated hemp shiv in a wall with a U-value of 0.15W/m<sup>2</sup>.K was compared to untreated hempcrete and a reference cavity wall with the same U-value. Considering the environmental damage caused by the production of hemp shiv, nitrogen fertiliser was the hotspot. The LCA results showed that, using innovative bio-based materials in construction, treated hemp shiv with sol-gel can decrease the carbon footprint of a building envelope through carbon sequestration. Using the more accurate site-specific information in life cycle inventory and impact assessment methods will result in more consistent and site-appropriate environmental results for decision-making.<br/> © 2019 by the authors.},\nkey = {Carbon footprint},\n%keywords = {Greenhouse gases;Construction;Environmental impact;Environmental management;Walls (structural partitions);Solar buildings;Sol-gel process;Decision making;Building materials;Coatings;Life cycle;Sol-gels;},\n%note = {Bio-based materials;Building envelopes;Carbon sequestration;Hemp shivs;Hempcrete;Regionalized LCA;},\nURL = {http://dx.doi.org/10.3390/ma12182987},\n} \n\n\n
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\n\n\n
\n Interest in intrinsically low-energy construction materials is becoming mainstream, and bio-based materials form a key part of that group of materials. The goal of this study was to analyse the environmental impact of applying a sol-gel coating on hemp shiv, in order to improve the durability of this innovative bio-based material, using a regionalised LCA model, taking into account regional specific peculiarities. This study analysed the environmental performance of using bio-based materials in the building envelope compared with traditional synthetic construction materials, and compared the impact of a regionalised approach with a global approach. The carbon footprint of treated hemp shiv in a wall with a U-value of 0.15W/m2.K was compared to untreated hempcrete and a reference cavity wall with the same U-value. Considering the environmental damage caused by the production of hemp shiv, nitrogen fertiliser was the hotspot. The LCA results showed that, using innovative bio-based materials in construction, treated hemp shiv with sol-gel can decrease the carbon footprint of a building envelope through carbon sequestration. Using the more accurate site-specific information in life cycle inventory and impact assessment methods will result in more consistent and site-appropriate environmental results for decision-making.
© 2019 by the authors.\n
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\n \n\n \n \n \n \n \n \n Effects of Contact Angle on Single and Multiscale Bubble Motions in the Aluminum Reduction Cell.\n \n \n \n \n\n\n \n Sun, M.; Mollaabbasi, R.; Li, B.; Alamdari, H.; Fafard, M.; and Taghavi, S. M.\n\n\n \n\n\n\n Industrial and Engineering Chemistry Research, 58(37): 17568 - 17582. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"EffectsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20193907479388 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effects of Contact Angle on Single and Multiscale Bubble Motions in the Aluminum Reduction Cell},\njournal = {Industrial and Engineering Chemistry Research},\nauthor = {Sun, Meijia and Mollaabbasi, Roozbeh and Li, Baokuan and Alamdari, Houshang and Fafard, Mario and Taghavi, Seyed Mohammad},\nvolume = {58},\nnumber = {37},\nyear = {2019},\npages = {17568 - 17582},\nissn = {08885885},\nabstract = {This work deals with the effects of the contact angle as an essential factor in bubble motions underneath downward-facing surfaces of the anode in the aluminum reduction cell. First, a transient three-dimensional (3D) mathematical model is employed to study a single bubble motion with the volume-of-fluid (VOF) method. In addition, a transient 3D model coupled with the discrete phase model and the VOF method is employed to track the microdispersed (â micrometer or â millimeter) and macroscale (â centimeter) bubbles in various contact angles. A discrete continuum transition model is developed to link the micro-to macroscale of bubbles and analyze the multiscale bubbles co-existing beneath the anode. The predicted gas coverage gives a reasonable match with the experimental data in the literature. The bubble release frequency decreases with increasing the contact angle provided that the contact angle is smaller than 90°, whereas the opposite occurs when the contact angles are larger than 90°.<br/> Copyright © 2019 American Chemical Society.},\nkey = {Contact angle},\n%keywords = {Ore reduction;Anodes;Electrolytic cells;Aluminum;3D modeling;},\n%note = {Aluminum reduction cells;Bubble release frequency;Continuum transitions;Discrete phase model;Downward facing surfaces;Single bubbles;Threedimensional (3-d);Volume of fluid method;},\nURL = {http://dx.doi.org/10.1021/acs.iecr.9b03656},\n} \n\n\n
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\n This work deals with the effects of the contact angle as an essential factor in bubble motions underneath downward-facing surfaces of the anode in the aluminum reduction cell. First, a transient three-dimensional (3D) mathematical model is employed to study a single bubble motion with the volume-of-fluid (VOF) method. In addition, a transient 3D model coupled with the discrete phase model and the VOF method is employed to track the microdispersed (â micrometer or â millimeter) and macroscale (â centimeter) bubbles in various contact angles. A discrete continuum transition model is developed to link the micro-to macroscale of bubbles and analyze the multiscale bubbles co-existing beneath the anode. The predicted gas coverage gives a reasonable match with the experimental data in the literature. The bubble release frequency decreases with increasing the contact angle provided that the contact angle is smaller than 90°, whereas the opposite occurs when the contact angles are larger than 90°.
Copyright © 2019 American Chemical Society.\n
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\n \n\n \n \n \n \n \n \n Determination of Optimum Configurations for Steel-Braced Frames with Segmental Elastic Spines.\n \n \n \n \n\n\n \n Chen, L.; Tremblay, R.; and Tirca, L.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 145(11). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"DeterminationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20193807446327 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Determination of Optimum Configurations for Steel-Braced Frames with Segmental Elastic Spines},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Chen, L. and Tremblay, R. and Tirca, L.},\nvolume = {145},\nnumber = {11},\nyear = {2019},\nissn = {07339445},\nabstract = {A simplified analysis method is proposed to predict the response of segmental elastic spine-braced frames (SESBFs) and select the appropriate truss-segment configuration for a given frame. The method relies on a simplified structure model that can reproduce both the elastic flexural response and inelastic shear response of the braced-frame system. The proposed simplified model is described, and a flowchart is presented to illustrate the steps leading to the frame properties required to achieve the optimum seismic drift response for a given truss-segment configuration. In the design, the process is repeated for different potential truss-segment configurations, and their seismic responses are compared to select a suitable configuration for the structure. The application of the proposed procedure is illustrated for a 24-story building structure located in Vancouver, British Columbia, Canada. Five different truss-segment arrangements were investigated, and two configurations were identified as appropriate for the structure. Final design of the four most promising candidates was performed to confirm the findings from the preliminary design, and the comparison confirmed that the proposed method and simplified analysis model are suitable tools for the preliminary design of SESBFs.<br/> © 2019 American Society of Civil Engineers.},\nkey = {Structural frames},\n%keywords = {Engineering geology;Seismology;Trusses;Seismic design;},\n%note = {Building structure;Optimum configurations;Preliminary design;Simplified analysis methods;Simplified analysis model;Steel braced frames;Structure modeling;Vancouver , British Columbia;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002398},\n} \n\n\n
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\n A simplified analysis method is proposed to predict the response of segmental elastic spine-braced frames (SESBFs) and select the appropriate truss-segment configuration for a given frame. The method relies on a simplified structure model that can reproduce both the elastic flexural response and inelastic shear response of the braced-frame system. The proposed simplified model is described, and a flowchart is presented to illustrate the steps leading to the frame properties required to achieve the optimum seismic drift response for a given truss-segment configuration. In the design, the process is repeated for different potential truss-segment configurations, and their seismic responses are compared to select a suitable configuration for the structure. The application of the proposed procedure is illustrated for a 24-story building structure located in Vancouver, British Columbia, Canada. Five different truss-segment arrangements were investigated, and two configurations were identified as appropriate for the structure. Final design of the four most promising candidates was performed to confirm the findings from the preliminary design, and the comparison confirmed that the proposed method and simplified analysis model are suitable tools for the preliminary design of SESBFs.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Knowledge-enhanced deep learning for simulation of tropical cyclone boundary-layer winds.\n \n \n \n \n\n\n \n Snaiki, R.; and Wu, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 194. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Knowledge-enhancedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20193807453055 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Knowledge-enhanced deep learning for simulation of tropical cyclone boundary-layer winds},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Snaiki, Reda and Wu, Teng},\nvolume = {194},\nyear = {2019},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">Accurate and efficient modeling of the wind field is critical to effective mitigation of losses due to the tropical cyclone-related hazards. To this end, a knowledge-enhanced deep learning algorithm was developed in this study to simulate the wind field inside tropical cyclone boundary-layer. More specifically, the machine-readable knowledge in terms of both physics-based equations and/or semi-empirical formulas was leveraged to enhance the regularization mechanism during the training of deep networks for dynamics of tropical cyclone boundary-layer winds. To comprehensively appreciate the high effectiveness of knowledge-enhanced deep learning to capture the complex dynamics using small datasets, two nonlinear flow systems governed respectively by 1D and 2D Navier-Stokes equations were first revisited. Then, a knowledge-enhanced deep network was developed to simulate tropical cyclone boundary-layer winds using the storm parameters (e.g., spatial coordinates, storm size and intensity) as inputs. The reduced 3D Navier-Stokes equations based on several state-of-the-art semi-empirical formulas were employed in the construction of deep networks. Due to the effective utilization of the prior knowledge on the tropical cyclone boundary-layer winds, only a relatively small number of training datasets (either from field measurements or high-fidelity numerical simulations) are needed. With the trained knowledge-enhanced deep network, it has been demonstrated that the boundary-layer winds associated with various tropical cyclones can be accurately and efficiently predicted.<br/></div> © 2019 Elsevier Ltd},\nkey = {Boundary layers},\n%keywords = {Hurricanes;Knowledge management;Nonlinear equations;Tropics;Equations of state;Wind;Deep learning;Learning algorithms;Tropical cyclone;Navier Stokes equations;},\n%note = {2D Navier Stokes equations;Effectiveness of knowledge;Field measurement;Regularization mechanism;Semi-empirical formulas;Spatial coordinates;Training data sets;Tropical cyclone;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2019.103983},\n} \n\n\n
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\n
Accurate and efficient modeling of the wind field is critical to effective mitigation of losses due to the tropical cyclone-related hazards. To this end, a knowledge-enhanced deep learning algorithm was developed in this study to simulate the wind field inside tropical cyclone boundary-layer. More specifically, the machine-readable knowledge in terms of both physics-based equations and/or semi-empirical formulas was leveraged to enhance the regularization mechanism during the training of deep networks for dynamics of tropical cyclone boundary-layer winds. To comprehensively appreciate the high effectiveness of knowledge-enhanced deep learning to capture the complex dynamics using small datasets, two nonlinear flow systems governed respectively by 1D and 2D Navier-Stokes equations were first revisited. Then, a knowledge-enhanced deep network was developed to simulate tropical cyclone boundary-layer winds using the storm parameters (e.g., spatial coordinates, storm size and intensity) as inputs. The reduced 3D Navier-Stokes equations based on several state-of-the-art semi-empirical formulas were employed in the construction of deep networks. Due to the effective utilization of the prior knowledge on the tropical cyclone boundary-layer winds, only a relatively small number of training datasets (either from field measurements or high-fidelity numerical simulations) are needed. With the trained knowledge-enhanced deep network, it has been demonstrated that the boundary-layer winds associated with various tropical cyclones can be accurately and efficiently predicted.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Modeling rain-induced effects on boundary-layer wind field of tropical cyclones.\n \n \n \n \n\n\n \n Snaiki, R.; and Wu, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 194. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ModelingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20193707417179 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modeling rain-induced effects on boundary-layer wind field of tropical cyclones},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Snaiki, Reda and Wu, Teng},\nvolume = {194},\nyear = {2019},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">Despite the significant impacts of heavy rainfall on the tropical cyclone intensity due to the transfer of horizontal momentum between air and raindrops, the comprehensive modeling of rain-induced effects on the boundary-layer wind field remains a challenge. The wind shear zone developed surrounding the falling precipitation results in complicated dynamic interactions between the wind and rain fields. The solution of dynamically coupled, intensively interactive wind and rain fields may be achieved using high-fidelity air-water interaction simulations but needs extremely high computational costs. To consider the wind-rain interactions with a first-order approximation, the fully-coupled dynamic system governing the raindrop motion and the wind field has been simplified herein to a weakly-coupled one represented by aerodynamic drag force. The drag-induced horizontal momentum transfer is integrated into the governing equations of the linear, height-resolving wind field, and an analytical model is accordingly developed to effectively consider the rain-induced effects on the boundary-layer winds of tropical cyclones. The results generated by the present model are consistent with the field measurements. It has been demonstrated that, while the wind speed can be either accelerated or decelerated depending on the location in the tropical cyclones and the rain parameters (e.g., rain rate, relative motion between the air and raindrops, drag coefficient and raindrop size distribution), the rain-induced effects on the boundary-layer wind directions (and hence the inflow angle) also have important significance on the tropical cyclone wind hazard on tall buildings and other structures. Due to its simplicity and high computational efficiency, the proposed model could be easily implemented in the risk assessments for tropical-cyclone wind hazards in engineering applications.<br/></div> © 2019 Elsevier Ltd},\nkey = {Rain},\n%keywords = {Computational efficiency;Aerodynamics;Drops;Monte Carlo methods;Tropical cyclone;Aerodynamic drag;Boundary layers;Hurricanes;Risk assessment;Size distribution;Tall buildings;Topology;Wind;Tropics;Air;Hazards;},\n%note = {Air water interactions;Engineering applications;First-order approximations;Monte Carlo techniques;Raindrop size distribution;Raindrops;Tropical cyclone;Tropical cyclone intensity;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2019.103986},\n} \n\n\n
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Despite the significant impacts of heavy rainfall on the tropical cyclone intensity due to the transfer of horizontal momentum between air and raindrops, the comprehensive modeling of rain-induced effects on the boundary-layer wind field remains a challenge. The wind shear zone developed surrounding the falling precipitation results in complicated dynamic interactions between the wind and rain fields. The solution of dynamically coupled, intensively interactive wind and rain fields may be achieved using high-fidelity air-water interaction simulations but needs extremely high computational costs. To consider the wind-rain interactions with a first-order approximation, the fully-coupled dynamic system governing the raindrop motion and the wind field has been simplified herein to a weakly-coupled one represented by aerodynamic drag force. The drag-induced horizontal momentum transfer is integrated into the governing equations of the linear, height-resolving wind field, and an analytical model is accordingly developed to effectively consider the rain-induced effects on the boundary-layer winds of tropical cyclones. The results generated by the present model are consistent with the field measurements. It has been demonstrated that, while the wind speed can be either accelerated or decelerated depending on the location in the tropical cyclones and the rain parameters (e.g., rain rate, relative motion between the air and raindrops, drag coefficient and raindrop size distribution), the rain-induced effects on the boundary-layer wind directions (and hence the inflow angle) also have important significance on the tropical cyclone wind hazard on tall buildings and other structures. Due to its simplicity and high computational efficiency, the proposed model could be easily implemented in the risk assessments for tropical-cyclone wind hazards in engineering applications.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Recommendations on the geometrical imperfections definition for the resistance of I-sections.\n \n \n \n \n\n\n \n Gerard, L.; Li, L.; Kettler, M.; and Boissonnade, N.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 162. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"RecommendationsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20193507380234 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Recommendations on the geometrical imperfections definition for the resistance of I-sections},\njournal = {Journal of Constructional Steel Research},\nauthor = {Gerard, Lucile and Li, Liya and Kettler, Markus and Boissonnade, Nicolas},\nvolume = {162},\nyear = {2019},\nissn = {0143974X},\nabstract = {The resistance and design of steel sections such as I and H-shapes usually depends in great extents on their ability to resist buckling, as a result of high width-to-thickness b / t ratios in the plates constituents. Consequently, these sections remain quite sensitive to imperfections. Information on imperfections, a key data for F.E. simulations, is however quite lacking in design standards, either for material imperfections or for geometrical imperfections. Accordingly, an extensive numerical study on hot-rolled and welded I and H-sections was carried out with the aim of providing reliable and efficient recommendations for the F.E. modelling of initial geometrical imperfections. Several sets of imperfections were investigated including the use of (i) sine-shape functions and of (ii) the 1st buckling mode shape. Reliable recommendations based on modification of nodes coordinates by means of sine-shape functions could be proposed afterwards.<br/> © 2019 Elsevier Ltd},\nkey = {Geometry},\n%keywords = {Hot rolling;Hot rolled steel;},\n%note = {Buckling mode shapes;Design standard;Geometrical imperfections;I-sections;Initial geometrical imperfections;Material imperfections;Shape functions;Steel sections;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2019.105716},\n} \n\n\n
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\n The resistance and design of steel sections such as I and H-shapes usually depends in great extents on their ability to resist buckling, as a result of high width-to-thickness b / t ratios in the plates constituents. Consequently, these sections remain quite sensitive to imperfections. Information on imperfections, a key data for F.E. simulations, is however quite lacking in design standards, either for material imperfections or for geometrical imperfections. Accordingly, an extensive numerical study on hot-rolled and welded I and H-sections was carried out with the aim of providing reliable and efficient recommendations for the F.E. modelling of initial geometrical imperfections. Several sets of imperfections were investigated including the use of (i) sine-shape functions and of (ii) the 1st buckling mode shape. Reliable recommendations based on modification of nodes coordinates by means of sine-shape functions could be proposed afterwards.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Influence of soil-structure interaction on seismic demands in shear wall building gravity load frames.\n \n \n \n \n\n\n \n Choiniere, M.; Paultre, P.; and Leger, P.\n\n\n \n\n\n\n Engineering Structures, 198. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"InfluencePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20193307324122 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Influence of soil-structure interaction on seismic demands in shear wall building gravity load frames},\njournal = {Engineering Structures},\nauthor = {Choiniere, Mathieu and Paultre, Patrick and Leger, Pierre},\nvolume = {198},\nyear = {2019},\nissn = {01410296},\nabstract = {This paper presents a complete and simple linear method, with a suitable force modification factor, to compute seismic demands in the gravity load resisting system (GLRS) of shear wall buildings including foundation movement. Based on the method first proposed by Beauchamp, Paultre and Léger in 2017, this paper compares two approaches to consider foundation movement on linear soil media such as (a) a simple rotational spring under each core and (b) a complete set of springs and dashpots. A fixed-base model using code foundation factors is also used for comparison. Springs and dashpots are assessed by modelling soil-structure interaction (SSI) with solid finite elements. Then, these approaches are evaluated for a typical 12-storey concrete shear wall building considering several nonlinear time history analyses (NLTHAs). SSI is modelled with a set of springs and dashpots, and ground motions are selected from the conditional spectrum method. NLTHAs are performed for soil classes ranging from stiff to soft, and the effect of the underground structure cracking is analysed. Analysis results show that the proposed methods are accurate in computing seismic demands in the GLRS compared to NLTHA. Foundation movements should be explicitly modelled for soil class D or softer, and underground structure cracking should be considered. For the very soft soil class E, the behaviour of the building is poorly captured in linear analysis methods; thus, nonlinear analyses are required.<br/> © 2019},\nkey = {Seismic design},\n%keywords = {Nonlinear analysis;Seismology;Reinforced concrete;Soil structure interactions;Shear walls;Underground structures;Soils;},\n%note = {Concrete shear wall;Conditional spectrums;Force modification factors;Gravity loads;Nonlinear time history analysis;Rotational spring;Seismic demands;Very soft soils;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2019.05.100},\n} \n\n\n
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\n This paper presents a complete and simple linear method, with a suitable force modification factor, to compute seismic demands in the gravity load resisting system (GLRS) of shear wall buildings including foundation movement. Based on the method first proposed by Beauchamp, Paultre and Léger in 2017, this paper compares two approaches to consider foundation movement on linear soil media such as (a) a simple rotational spring under each core and (b) a complete set of springs and dashpots. A fixed-base model using code foundation factors is also used for comparison. Springs and dashpots are assessed by modelling soil-structure interaction (SSI) with solid finite elements. Then, these approaches are evaluated for a typical 12-storey concrete shear wall building considering several nonlinear time history analyses (NLTHAs). SSI is modelled with a set of springs and dashpots, and ground motions are selected from the conditional spectrum method. NLTHAs are performed for soil classes ranging from stiff to soft, and the effect of the underground structure cracking is analysed. Analysis results show that the proposed methods are accurate in computing seismic demands in the GLRS compared to NLTHA. Foundation movements should be explicitly modelled for soil class D or softer, and underground structure cracking should be considered. For the very soft soil class E, the behaviour of the building is poorly captured in linear analysis methods; thus, nonlinear analyses are required.
© 2019\n
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\n \n\n \n \n \n \n \n \n Determination of the fuzzy measures for multicriteria and optimal design of a building façade using Choquet integrals.\n \n \n \n \n\n\n \n Moghtadernejad, S.; Mirza, M. S.; and Chouinard, L. E.\n\n\n \n\n\n\n Journal of Building Engineering, 26. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"DeterminationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20193407351081 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Determination of the fuzzy measures for multicriteria and optimal design of a building façade using Choquet integrals},\njournal = {Journal of Building Engineering},\nauthor = {Moghtadernejad, Saviz and Mirza, M. Saeed and Chouinard, Luc E.},\nvolume = {26},\nyear = {2019},\nissn = {23527102},\nabstract = {Building façade design procedures are very complex due to the necessity of providing a balance between all necessary functions of the system. Although façades have a significant impact on overall building performance and the comfort level of occupants, their design and detailing is not receiving enough attention. Presently, most designers tend to use design methods that are optimized with respect to only a few objectives. The trend towards designing high performance and sustainable buildings is prompting designers to adopt better optimization methods for striking a balance between required performance attributes. Therefore, application of multi-criteria decision making (MCDM) methods is receiving increased attention in the building design process. Currently-used MCDM methods cannot account for the interdependence among decision criteria, implicitly assuming that they are mutually independent. However, in practical applications interactions do exist and cannot be neglected. Application of the Choquet integral solves this problem and avoids double-counting in the decision-making process when interactions are present. However, determining the required fuzzy measures used for assigning weights to each subset of decision criteria is not an easy task, especially in fields where the application of MCDM methods is relatively new, such as the construction industry and for designing building envelopes. This paper will introduce a Choquet-based design approach as well as feasible methods to extract the fuzzy measures for designing exterior walls and building façades.<br/> © 2019 Elsevier Ltd},\nkey = {Decision making},\n%keywords = {Fuzzy systems;Architectural design;Construction industry;Integral equations;Intelligent buildings;},\n%note = {Building design process;Building performance;Decision criterions;Decision making process;Design method;Multi-criteria decision making;Mutually independents;Sustainable building;},\nURL = {http://dx.doi.org/10.1016/j.jobe.2019.100877},\n} \n\n\n
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\n Building façade design procedures are very complex due to the necessity of providing a balance between all necessary functions of the system. Although façades have a significant impact on overall building performance and the comfort level of occupants, their design and detailing is not receiving enough attention. Presently, most designers tend to use design methods that are optimized with respect to only a few objectives. The trend towards designing high performance and sustainable buildings is prompting designers to adopt better optimization methods for striking a balance between required performance attributes. Therefore, application of multi-criteria decision making (MCDM) methods is receiving increased attention in the building design process. Currently-used MCDM methods cannot account for the interdependence among decision criteria, implicitly assuming that they are mutually independent. However, in practical applications interactions do exist and cannot be neglected. Application of the Choquet integral solves this problem and avoids double-counting in the decision-making process when interactions are present. However, determining the required fuzzy measures used for assigning weights to each subset of decision criteria is not an easy task, especially in fields where the application of MCDM methods is relatively new, such as the construction industry and for designing building envelopes. This paper will introduce a Choquet-based design approach as well as feasible methods to extract the fuzzy measures for designing exterior walls and building façades.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Robustness of resonant frequency test for strength estimation of concrete.\n \n \n \n \n\n\n \n Sajid, S.; Chouinard, L.; and Carino, N.\n\n\n \n\n\n\n Advances in Civil Engineering Materials, 8(1): 451 - 462. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"RobustnessPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20193207281560 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Robustness of resonant frequency test for strength estimation of concrete},\njournal = {Advances in Civil Engineering Materials},\nauthor = {Sajid, Sikandar and Chouinard, Luc and Carino, Nicholas},\nvolume = {8},\nnumber = {1},\nyear = {2019},\npages = {451 - 462},\nissn = {23791357},\nabstract = {The resonant frequency test (RFT) of molded concrete specimens is a nondestructive test (NDT) method for indirect strength estimation based on the fundamental mode characteristic resonance frequency. In this article, experimental, numerical, and analytical studies were performed to assess the sensitivity of test results to various factors involved in RFT. These factors included vibration modes of the specimen, sensor attachment techniques, contact time of the hammer impact, location of the sensor on the specimen, length to diameter ratio (L/D), and cross-sectional shape of the specimen. Experimental study included concrete specimen preparation in the lab and real-time RFT measurements for robustness of some of the aforementioned factors. Computation models developed using numerical simulations were verified by laboratory test and analytical results. The finite element method-based code, ABAQUS, was employed for computational modeling. Statistical analyses of the experimental results and parametric studies of the computational modeling were used to quantify the effect of the aforementioned factors on uncertainties of strength estimates using RFT measurements. The contact time of the hammer impact and the L/D of the specimen were found to have considerable effect on test results and hence on the concrete strength estimates.<br/> Copyright © 2019 by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959},\nkey = {Natural frequencies},\n%keywords = {Hammers;Computation theory;Nondestructive examination;Uncertainty analysis;Concretes;},\n%note = {ASTM C215;Computational model;Concrete masonry units;Cross-sectional shape;Length to diameter ratio;Non-destructive test;Resonance frequencies;Strength Estimation;},\nURL = {http://dx.doi.org/10.1520/ACEM20190059},\n} \n\n\n
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\n The resonant frequency test (RFT) of molded concrete specimens is a nondestructive test (NDT) method for indirect strength estimation based on the fundamental mode characteristic resonance frequency. In this article, experimental, numerical, and analytical studies were performed to assess the sensitivity of test results to various factors involved in RFT. These factors included vibration modes of the specimen, sensor attachment techniques, contact time of the hammer impact, location of the sensor on the specimen, length to diameter ratio (L/D), and cross-sectional shape of the specimen. Experimental study included concrete specimen preparation in the lab and real-time RFT measurements for robustness of some of the aforementioned factors. Computation models developed using numerical simulations were verified by laboratory test and analytical results. The finite element method-based code, ABAQUS, was employed for computational modeling. Statistical analyses of the experimental results and parametric studies of the computational modeling were used to quantify the effect of the aforementioned factors on uncertainties of strength estimates using RFT measurements. The contact time of the hammer impact and the L/D of the specimen were found to have considerable effect on test results and hence on the concrete strength estimates.
Copyright © 2019 by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959\n
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\n \n\n \n \n \n \n \n \n Triaxial simple shear test: TxSS.\n \n \n \n \n\n\n \n Karray, M.; and Chekired, M.\n\n\n \n\n\n\n In volume 92, Glasgow, United kingdom, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"TriaxialPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20193107245583 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Triaxial simple shear test: TxSS},\njournal = {E3S Web of Conferences},\nauthor = {Karray, Mourad and Chekired, Mohamed},\nvolume = {92},\nyear = {2019},\nissn = {25550403},\naddress = {Glasgow, United kingdom},\nabstract = {This paper presents a combined triaxial simple shear (TxSS) apparatus developed by the Research Institute of Hydro-Québec (IREQ) in collaboration with the soil dynamics and geotechnical engineering group of the Université de Sherbrooke (Québec, Canada). The TxSS system consists of a simple shear apparatus incorporated in a triaxial cell for the measurements of monotonic and dynamic characteristics of soil samples. A general description as well as some applications and advantages of the TxSS systems over the traditional apparatus are presented. The key application of the TxSS is the evaluation of liquefaction potential of soil under regular or irregular excitations. Test results in terms of monotonic and dynamic characteristics obtained using the TxSS device on different cohesive and cohesionless soil samples are presented to illustrate its capabilities. They are successfully compared to those obtained using reliable design charts available in the literature, conventional apparatus and to those from rigorous numerical analyses.<br/> © The Authors, published by EDP Sciences.},\nkey = {Soils},\n%keywords = {Geotechnical engineering;Soil liquefaction;Deformation;Soil mechanics;Soil surveys;},\n%note = {Cohesionless soil;Dynamic characteristics;Evaluation of liquefactions;General description;Measurements of;Research institutes;Simple shear test;Triaxial cells;},\nURL = {http://dx.doi.org/10.1051/e3sconf/20199202014},\n} \n\n\n
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\n This paper presents a combined triaxial simple shear (TxSS) apparatus developed by the Research Institute of Hydro-Québec (IREQ) in collaboration with the soil dynamics and geotechnical engineering group of the Université de Sherbrooke (Québec, Canada). The TxSS system consists of a simple shear apparatus incorporated in a triaxial cell for the measurements of monotonic and dynamic characteristics of soil samples. A general description as well as some applications and advantages of the TxSS systems over the traditional apparatus are presented. The key application of the TxSS is the evaluation of liquefaction potential of soil under regular or irregular excitations. Test results in terms of monotonic and dynamic characteristics obtained using the TxSS device on different cohesive and cohesionless soil samples are presented to illustrate its capabilities. They are successfully compared to those obtained using reliable design charts available in the literature, conventional apparatus and to those from rigorous numerical analyses.
© The Authors, published by EDP Sciences.\n
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\n \n\n \n \n \n \n \n \n Importance of coherence between geophysical and geotechnical data in dynamic response analysis.\n \n \n \n \n\n\n \n Karray, M.; Tremblay, S.; Hussein, M. N.; and Chekired, M.\n\n\n \n\n\n\n In volume 92, Glasgow, United kingdom, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"ImportancePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20193107245505 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Importance of coherence between geophysical and geotechnical data in dynamic response analysis},\njournal = {E3S Web of Conferences},\nauthor = {Karray, Mourad and Tremblay, Simon-Pierre and Hussein, Mahmoud N. and Chekired, Mohamed},\nvolume = {92},\nyear = {2019},\nissn = {25550403},\naddress = {Glasgow, United kingdom},\nabstract = {The demand for a precise evaluation of shear wave velocity V<inf>s</inf>, is gaining interest in the field of geotechnical engineering due to its importance as a key parameter required to properly evaluate typical characteristics of soils. Nowadays, V<inf>s</inf> measurements are performed on the field using different methods, such as SCPT tests and various geophysical methods. However, the effectiveness of these field measurements is not guaranteed and rather depends on how they are analyzed. Furthermore, a proper analysis is critical since the collected data may be used in liquefaction evaluation or earthquake ground response analyses. In these situations, it is recommended to verify the coherence between the obtained geophysical (V<inf>s</inf>) and geotechnical (N-SPT, q<inf>c</inf>-CPT) measurements using alternative methods (e.g., V<inf>s</inf>-correlations, H/V method, etc...). In some situations, the correlation between the different measurements makes it easier to unambiguously define seismic wave profiles. In other cases, geophysical and geotechnical tests would provide different resolutions for V<inf>s</inf> measurements, an issue that complicates the decision of the practitioner. In this paper, we first demonstrate the importance of the shear-wave velocity in liquefaction potential analysis. A case study performed in eastern Canada is also presented where we show the importance of the method used to calculate V<inf>s</inf> profiles (MASW, MMASW).<br/> © The Authors, published by EDP Sciences.},\nkey = {Shear waves},\n%keywords = {Seismic response;Earthquake engineering;Earthquakes;Soil liquefaction;Geotechnical engineering;Acoustic wave velocity;Wave propagation;Shear flow;},\n%note = {Different resolutions;Dynamic response analysis;Geophysical methods;Geotechnical tests;Ground response analysis;Liquefaction evaluation;Liquefaction potentials;Shear wave velocity;},\nURL = {http://dx.doi.org/10.1051/e3sconf/20199218007},\n} \n\n\n
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\n The demand for a precise evaluation of shear wave velocity Vs, is gaining interest in the field of geotechnical engineering due to its importance as a key parameter required to properly evaluate typical characteristics of soils. Nowadays, Vs measurements are performed on the field using different methods, such as SCPT tests and various geophysical methods. However, the effectiveness of these field measurements is not guaranteed and rather depends on how they are analyzed. Furthermore, a proper analysis is critical since the collected data may be used in liquefaction evaluation or earthquake ground response analyses. In these situations, it is recommended to verify the coherence between the obtained geophysical (Vs) and geotechnical (N-SPT, qc-CPT) measurements using alternative methods (e.g., Vs-correlations, H/V method, etc...). In some situations, the correlation between the different measurements makes it easier to unambiguously define seismic wave profiles. In other cases, geophysical and geotechnical tests would provide different resolutions for Vs measurements, an issue that complicates the decision of the practitioner. In this paper, we first demonstrate the importance of the shear-wave velocity in liquefaction potential analysis. A case study performed in eastern Canada is also presented where we show the importance of the method used to calculate Vs profiles (MASW, MMASW).
© The Authors, published by EDP Sciences.\n
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\n \n\n \n \n \n \n \n \n Cyclic and dynamic behaviour of a Canadian sensitive clay.\n \n \n \n \n\n\n \n dOnofrio , A.; Chiaradonna, A.; Lanzo, G.; and Karray, M.\n\n\n \n\n\n\n In volume 92, Glasgow, United kingdom, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"CyclicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20193107245531 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Cyclic and dynamic behaviour of a Canadian sensitive clay},\njournal = {E3S Web of Conferences},\nauthor = {dOnofrio, Anna and Chiaradonna, Anna and Lanzo, Giuseppe and Karray, Mourad},\nvolume = {92},\nyear = {2019},\nissn = {25550403},\naddress = {Glasgow, United kingdom},\nabstract = {Clays with higher undisturbed undrained shear strengths than remoulded strengths are considered sensitive. While the stress-strain behaviour of these clays under monotonic loading condition was widely investigated, few data are available of their behaviour under cyclic and dynamic loading conditions. This paper presents the preliminary results of an experimental program on undisturbed samples of a sensitive clay retrieved at Saint Luc de Vincennes (Quebec). In particular, the paper shows the comparison among the modulus reduction curve, G/G<inf>0</inf> - γ and the damping ratio variation with shear strain, D - γ measured using different devices, trying to highlight the main factors influencing the observed behaviour, including sample disturbance and storing method. The tests were carried out using one torsional shear and two different cyclic simple shear devices capable of investigating from small to large shear strains. The tests were carried out by three different laboratories at the Université de Sherbrooke, Canada, the University of Naples Federico II and the Sapienza University of Rome, Italy. Oedometric tests also performed by the three different research teams indicate that the clay samples were carefully shipped and stored, and the soil specimens were accurately prepared. Some differences were observed in the G/G<inf>0</inf>(γ) and D(γ) curves obtained by different tests, some of them ascribed to the intrinsic anisotropy of the investigated clay.<br/> © The Authors, published by EDP Sciences.},\nkey = {Shear strain},\n%keywords = {Soil mechanics;Dynamic loads;Deformation;Stress analysis;},\n%note = {Cyclic simple shear;Dynamic loading conditions;Experimental program;Intrinsic anisotropy;Sample disturbance;Stress strain behaviours;Undisturbed sample;Undrained shear strength;},\nURL = {http://dx.doi.org/10.1051/e3sconf/20199208003},\n} \n\n\n
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\n Clays with higher undisturbed undrained shear strengths than remoulded strengths are considered sensitive. While the stress-strain behaviour of these clays under monotonic loading condition was widely investigated, few data are available of their behaviour under cyclic and dynamic loading conditions. This paper presents the preliminary results of an experimental program on undisturbed samples of a sensitive clay retrieved at Saint Luc de Vincennes (Quebec). In particular, the paper shows the comparison among the modulus reduction curve, G/G0 - γ and the damping ratio variation with shear strain, D - γ measured using different devices, trying to highlight the main factors influencing the observed behaviour, including sample disturbance and storing method. The tests were carried out using one torsional shear and two different cyclic simple shear devices capable of investigating from small to large shear strains. The tests were carried out by three different laboratories at the Université de Sherbrooke, Canada, the University of Naples Federico II and the Sapienza University of Rome, Italy. Oedometric tests also performed by the three different research teams indicate that the clay samples were carefully shipped and stored, and the soil specimens were accurately prepared. Some differences were observed in the G/G0(γ) and D(γ) curves obtained by different tests, some of them ascribed to the intrinsic anisotropy of the investigated clay.
© The Authors, published by EDP Sciences.\n
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\n \n\n \n \n \n \n \n \n Total Stress Analysis of Soft Clay Ground Response in Centrifuge Models.\n \n \n \n \n\n\n \n Afacan, K. B.; Yniesta, S.; Shafiee, A.; Stewart, J. P.; and Brandenberg, S. J.\n\n\n \n\n\n\n Journal of Geotechnical and Geoenvironmental Engineering, 145(10). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"TotalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192907210372 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Total Stress Analysis of Soft Clay Ground Response in Centrifuge Models},\njournal = {Journal of Geotechnical and Geoenvironmental Engineering},\nauthor = {Afacan, Kamil B. and Yniesta, Samuel and Shafiee, Ali and Stewart, Jonathan P. and Brandenberg, Scott J.},\nvolume = {145},\nnumber = {10},\nyear = {2019},\nissn = {10900241},\nabstract = {This paper presents one-dimensional ground response simulations of centrifuge models involving soft clay deposits subjected to ground motions of varying intensity. Total stress ground response simulations were performed using equivalent-linear (EL) and nonlinear (NL) methods. Shear strains higher than 10% were mobilized during large ground motions; therefore, undrained shear strength of the clay is an important parameter for the simulations. Testing shows that the San Francisco Bay Mud materials used in centrifuge modeling have monotonic shear strengths that increase by 13% per log cycle of shear strain rate. A comparison of simulation results to observations reveals the importance of incorporating shear strength into the development of stress-strain backbone curves, with appropriate consideration of rate adjustments to shear strength and stiffness. NL ground response simulations provide a good match to observed pseudospectral accelerations only when rate-adjusted shear strengths are properly accounted for; otherwise, the NL simulations have significant underprediction bias at oscillator periods less than the soil column period. EL modeling, even with the incorporation of shear strength, leads to unrealistic spectral shapes and overprediction at short spectral periods for tests involving large-strain site response.<br/> © 2019 American Society of Civil Engineers.},\nkey = {Strain rate},\n%keywords = {Centrifuges;Soil mechanics;Shear strain;Clay deposits;Soil testing;Geotechnical engineering;Shear strength;Stress-strain curves;},\n%note = {Backbone curves;Centrifuge modeling;Centrifuge models;Equivalent-linear;Ground response;San Francisco Bay;Strength and stiffness;Undrained shear strength;},\nURL = {http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.0002115},\n} \n\n\n
\n
\n\n\n
\n This paper presents one-dimensional ground response simulations of centrifuge models involving soft clay deposits subjected to ground motions of varying intensity. Total stress ground response simulations were performed using equivalent-linear (EL) and nonlinear (NL) methods. Shear strains higher than 10% were mobilized during large ground motions; therefore, undrained shear strength of the clay is an important parameter for the simulations. Testing shows that the San Francisco Bay Mud materials used in centrifuge modeling have monotonic shear strengths that increase by 13% per log cycle of shear strain rate. A comparison of simulation results to observations reveals the importance of incorporating shear strength into the development of stress-strain backbone curves, with appropriate consideration of rate adjustments to shear strength and stiffness. NL ground response simulations provide a good match to observed pseudospectral accelerations only when rate-adjusted shear strengths are properly accounted for; otherwise, the NL simulations have significant underprediction bias at oscillator periods less than the soil column period. EL modeling, even with the incorporation of shear strength, leads to unrealistic spectral shapes and overprediction at short spectral periods for tests involving large-strain site response.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Wind-induced cladding and structural loads on low-rise buildings with 4:12-sloped hip roofs.\n \n \n \n \n\n\n \n Shao, S.; Tian, Y.; Yang, Q.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Wind Engineering and Industrial Aerodynamics, 193. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Wind-inducedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20193007220372 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind-induced cladding and structural loads on low-rise buildings with 4:12-sloped hip roofs},\njournal = {Journal of Wind Engineering and Industrial Aerodynamics},\nauthor = {Shao, Shuai and Tian, Yuji and Yang, Qingshan and Stathopoulos, Ted},\nvolume = {193},\nyear = {2019},\nissn = {01676105},\nabstract = {<div data-language="eng" data-ev-field="abstract">The characteristics of cladding and structural loads for 4:12-sloped hip-roofed low-rise buildings with rectangular, L- and T-shaped plans are examined, based on wind tunnel data and three-dimensional linear computational models. Regarding cladding loads, the rectangular gable roof incurs more considerable local suction, compared with the rectangular hip roof. However, due to building plan configurations, intense suction and positive pressure are distinctly distributed on roofs and walls around building re-entrant corners of hip-roofed non-rectangular buildings. Considering structural loads, very high pressures act on the gable-roofed end frame, compared with those on the corresponding hip-roofed frames. Furthermore, the building plan impact on structural load patterns varying with wind directions and on most critical values is clear. Particularly, the most critical structural loads acting on intermediate and penultimate frames of wings of L-shaped hip-roofed buildings and side wings of T-shaped cases, show a 25% maximum increase. However, regarding the central wings of T-shaped buildings, results generally fall within the same range with those of the rectangular and L-shaped buildings. In addition, the structural connections and boundary conditions significantly influence structural load magnitudes and distribution shapes. Finally, the effect of horizontal aspect ratios on both cladding and structural loads is found to be minimal.<br/></div> © 2019 Elsevier Ltd},\nkey = {Aspect ratio},\n%keywords = {Cladding (coating);Buildings;Wind tunnels;Finite element method;Roofs;},\n%note = {Computational model;Distribution shapes;L- and T-shaped;Low-rise buildings;Re-entrant corners;Rectangular Buildings;Structural connections;Wind tunnel tests;},\nURL = {http://dx.doi.org/10.1016/j.jweia.2019.103948},\n} \n\n\n
\n
\n\n\n
\n
The characteristics of cladding and structural loads for 4:12-sloped hip-roofed low-rise buildings with rectangular, L- and T-shaped plans are examined, based on wind tunnel data and three-dimensional linear computational models. Regarding cladding loads, the rectangular gable roof incurs more considerable local suction, compared with the rectangular hip roof. However, due to building plan configurations, intense suction and positive pressure are distinctly distributed on roofs and walls around building re-entrant corners of hip-roofed non-rectangular buildings. Considering structural loads, very high pressures act on the gable-roofed end frame, compared with those on the corresponding hip-roofed frames. Furthermore, the building plan impact on structural load patterns varying with wind directions and on most critical values is clear. Particularly, the most critical structural loads acting on intermediate and penultimate frames of wings of L-shaped hip-roofed buildings and side wings of T-shaped cases, show a 25% maximum increase. However, regarding the central wings of T-shaped buildings, results generally fall within the same range with those of the rectangular and L-shaped buildings. In addition, the structural connections and boundary conditions significantly influence structural load magnitudes and distribution shapes. Finally, the effect of horizontal aspect ratios on both cladding and structural loads is found to be minimal.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Modeling of the clogging in a MgO column used to treat a Ni- and Co-contaminated water and performance prediction for a centripetal radial column.\n \n \n \n \n\n\n \n de Repentigny, C.; Zagury, G. J.; and Courcelles, B.\n\n\n \n\n\n\n Chemosphere, 236. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ModelingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20193007221495 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modeling of the clogging in a MgO column used to treat a Ni- and Co-contaminated water and performance prediction for a centripetal radial column},\njournal = {Chemosphere},\nauthor = {de Repentigny, Carl and Zagury, Gerald J. and Courcelles, Benoit},\nvolume = {236},\nyear = {2019},\nissn = {00456535},\nabstract = {A geochemical model was established to predict the chemical and hydraulic performances of MgO columns used to treat a nickel- and cobalt-contaminated groundwater. Using the PHREEQC software, an advection-reaction simulation was carried out to re-create the outlet concentrations observed during a previous axial column laboratory test. Reaction kinetics were introduced to calculate the rates of brucite dissolution as well as iron and manganese oxidation. Pore volume diminution during the test was also predicted using the volume of goethite precipitates generated. The floating-sphere model was applied to calculate the equivalent hydraulic conductivity (K<inf>eq</inf>) of the column. The geometry of the model's cells was then adjusted to represent a radial centripetal filter containing the same amount of reactive MgO. The K<inf>eq</inf> predictions for the centripetal filter showed that the loss of permeability in the filter could be significantly delayed by changing the filter's flow configuration. While those results are promising, further testing is necessary to provide additional experimental results for radial filters.<br/> © 2019 Elsevier Ltd},\nkey = {Heavy metals},\n%keywords = {Geochemistry;Groundwater;Groundwater pollution;Software testing;Forecasting;Soil pollution;Magnesia;Remediation;Water treatment;Nickel compounds;Reaction kinetics;},\n%note = {Contaminated groundwater;Equivalent hydraulic conductivities;Floating sphere model;Geochemical modeling;Hydraulic performance;Manganese oxidations;Performance prediction;Permeable reactive barriers;},\nURL = {http://dx.doi.org/10.1016/j.chemosphere.2019.07.038},\n} \n\n\n
\n
\n\n\n
\n A geochemical model was established to predict the chemical and hydraulic performances of MgO columns used to treat a nickel- and cobalt-contaminated groundwater. Using the PHREEQC software, an advection-reaction simulation was carried out to re-create the outlet concentrations observed during a previous axial column laboratory test. Reaction kinetics were introduced to calculate the rates of brucite dissolution as well as iron and manganese oxidation. Pore volume diminution during the test was also predicted using the volume of goethite precipitates generated. The floating-sphere model was applied to calculate the equivalent hydraulic conductivity (Keq) of the column. The geometry of the model's cells was then adjusted to represent a radial centripetal filter containing the same amount of reactive MgO. The Keq predictions for the centripetal filter showed that the loss of permeability in the filter could be significantly delayed by changing the filter's flow configuration. While those results are promising, further testing is necessary to provide additional experimental results for radial filters.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n A probability-based reliability assessment approach of seismic base-isolated bridges in cold regions.\n \n \n \n \n\n\n \n Nassar, M.; Guizani, L.; Nollet, M.; and Tahan, A.\n\n\n \n\n\n\n Engineering Structures, 197. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192807172315 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A probability-based reliability assessment approach of seismic base-isolated bridges in cold regions},\njournal = {Engineering Structures},\nauthor = {Nassar, Mohamad and Guizani, Lotfi and Nollet, Marie-Jose and Tahan, Antoine},\nvolume = {197},\nyear = {2019},\nissn = {01410296},\nabstract = {Seismic base isolation is widely used to ensure desirable performance of bridge structures against earthquakes. Seismic response of base-isolated bridges is strongly dependent on seismic isolator's properties. However, these properties vary under the effect of multiple conditions such as temperature. The bounding analysis approach, recommended by current design codes to consider such variations, does not rigorously take into account the probability of a simultaneous occurrence of earthquakes with these conditions. As a result, base-isolated bridge design may not be optimised and the reliability of base-isolated bridges remains uncontrolled. This paper presents a probability-based reliability assessment method to consider the variations of seismic isolation properties under different conditions. Temperature, seismic hazard, the dimensions and the material mechanical properties of key structure elements are modelled as random variables. An application of the methodology is demonstrated through a case study of a base-isolated two span reinforced concrete bridge. Two limit states are considered: (1) in terms of the bending moment capacity of the bridge's pile and (2) in terms of the displacement capacity of the seismic isolator. Preliminary results reveal that, for the case-study bridge, the global reliability of the bridge is equal to the reliability of the limit state (2). This is because the reserve provided by the bias and security factors is applied in the case of the limit state (1) but not considered for the limit state (2). What's more, results reveal that for the case-study bridge, the seismic reliability depends on the seismic input severity more than on low temperature severity. This paper advances the basics of a method to assess the reliability of base-isolated bridges. Its application is demonstrated and preliminary results are obtained through a case study. A more systematic study using the proposed methodology should allow for the establishment of seismic guidelines with uniform target reliability.<br/> © 2019 Elsevier Ltd},\nkey = {Earthquakes},\n%keywords = {Reliability analysis;Seismic design;Bridges;Piles;Probability;Temperature;Reinforced concrete;},\n%note = {Hysteretic properties;Limit state designs;Low temperatures;Reliability-based;Seismic base isolation;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2019.109353},\n} \n\n\n
\n
\n\n\n
\n Seismic base isolation is widely used to ensure desirable performance of bridge structures against earthquakes. Seismic response of base-isolated bridges is strongly dependent on seismic isolator's properties. However, these properties vary under the effect of multiple conditions such as temperature. The bounding analysis approach, recommended by current design codes to consider such variations, does not rigorously take into account the probability of a simultaneous occurrence of earthquakes with these conditions. As a result, base-isolated bridge design may not be optimised and the reliability of base-isolated bridges remains uncontrolled. This paper presents a probability-based reliability assessment method to consider the variations of seismic isolation properties under different conditions. Temperature, seismic hazard, the dimensions and the material mechanical properties of key structure elements are modelled as random variables. An application of the methodology is demonstrated through a case study of a base-isolated two span reinforced concrete bridge. Two limit states are considered: (1) in terms of the bending moment capacity of the bridge's pile and (2) in terms of the displacement capacity of the seismic isolator. Preliminary results reveal that, for the case-study bridge, the global reliability of the bridge is equal to the reliability of the limit state (2). This is because the reserve provided by the bias and security factors is applied in the case of the limit state (1) but not considered for the limit state (2). What's more, results reveal that for the case-study bridge, the seismic reliability depends on the seismic input severity more than on low temperature severity. This paper advances the basics of a method to assess the reliability of base-isolated bridges. Its application is demonstrated and preliminary results are obtained through a case study. A more systematic study using the proposed methodology should allow for the establishment of seismic guidelines with uniform target reliability.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Performance of Eccentrically Loaded Reinforced-Concrete Masonry Columns Strengthened Using FRP Wraps.\n \n \n \n \n\n\n \n El-Sokkary, H.; and Galal, K.\n\n\n \n\n\n\n Journal of Composites for Construction, 23(5). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"PerformancePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192707134362 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance of Eccentrically Loaded Reinforced-Concrete Masonry Columns Strengthened Using FRP Wraps},\njournal = {Journal of Composites for Construction},\nauthor = {El-Sokkary, Hossam and Galal, Khaled},\nvolume = {23},\nnumber = {5},\nyear = {2019},\nissn = {10900268},\nabstract = {This paper presents an experimental study that investigates the behavior of reinforced masonry (RM) columns strengthened using carbon fiber-reinforced polymer (CFRP) wraps under eccentric axial loading. Nine half-scale square RM columns with reinforced concrete (RC) end blocks were tested under three different eccentricity-to-section height (e/h) ratios (0.15, 0.25, and 0.50). For each load eccentricity, the columns were tested unwrapped, wrapped with one layer of CFRP, and wrapped with two layers. The effect of partially grouted masonry cells on column capacity was also evaluated. Existing analytical procedures for RC column sections were applied to the fully grouted RM columns. The experimental tests showed that CFRP wrapping increased the column's axial capacity by up to 41% at a nominal e/h ratio of 0.25, while an enhancement of 45% was achieved at a nominal e/h ratio of 0.50. The analytical procedures were able to predict the failure mode and axial capacity of the tested columns. The columns' axial capacities were estimated with a maximum error of 11%, which indicates the validity of the analytical procedures for eccentrically loaded RM columns.<br/> © 2019 American Society of Civil Engineers.},\nkey = {Reinforced concrete},\n%keywords = {Grouting;Axial loads;Concrete construction;Columns (structural);Carbon fiber reinforced plastics;Mortar;},\n%note = {Analytical procedure;Axial loading;Carbon fiber reinforced polymer wraps;Eccentrically loaded;Experimental test;Fiber reinforced polymers;Reinforced concrete masonry;Reinforced masonry;},\nURL = {http://dx.doi.org/10.1061/(ASCE)CC.1943-5614.0000958},\n} \n\n\n
\n
\n\n\n
\n This paper presents an experimental study that investigates the behavior of reinforced masonry (RM) columns strengthened using carbon fiber-reinforced polymer (CFRP) wraps under eccentric axial loading. Nine half-scale square RM columns with reinforced concrete (RC) end blocks were tested under three different eccentricity-to-section height (e/h) ratios (0.15, 0.25, and 0.50). For each load eccentricity, the columns were tested unwrapped, wrapped with one layer of CFRP, and wrapped with two layers. The effect of partially grouted masonry cells on column capacity was also evaluated. Existing analytical procedures for RC column sections were applied to the fully grouted RM columns. The experimental tests showed that CFRP wrapping increased the column's axial capacity by up to 41% at a nominal e/h ratio of 0.25, while an enhancement of 45% was achieved at a nominal e/h ratio of 0.50. The analytical procedures were able to predict the failure mode and axial capacity of the tested columns. The columns' axial capacities were estimated with a maximum error of 11%, which indicates the validity of the analytical procedures for eccentrically loaded RM columns.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Distinct element modelling of the in-plane cyclic response of URM walls subjected to shear-compression.\n \n \n \n \n\n\n \n Malomo, D.; DeJong, M. J.; and Penna, A.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 48(12): 1322 - 1344. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"DistinctPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192707133473 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Distinct element modelling of the in-plane cyclic response of URM walls subjected to shear-compression},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Malomo, Daniele and DeJong, Matthew J. and Penna, Andrea},\nvolume = {48},\nnumber = {12},\nyear = {2019},\npages = {1322 - 1344},\nissn = {00988847},\nabstract = {The in-plane capacity of unreinforced masonry (URM) elements may vary considerably depending on several factors, including boundary conditions, aspect ratio, vertical overburden, and masonry texture. Since the overall system resistance mainly relies on the in-plane lateral capacity of URM components when out-of-plane modes are adequately prevented, the structural assessment of URM structures could benefit from advanced numerical approaches able to account for these factors simultaneously. This paper aims at enhancing and optimising the employment of the distinct element method, currently confined to the analysis of local mechanisms of reduced-scale dry-joint blocky assemblies, with a view to simulate the experimentally observed responses of a series of URM full-scale specimens with mortared joints subjected to quasi-static in-plane cyclic loading. To this end, a mesoscale modelling approach is proposed that employs a simplified microscale modelling approach to effectively capture macroscale behaviour. Dynamic relaxation schemes are employed, in combination with time, size, and mass-scaling procedures, to decrease computational demand. A new methodology for numerically describing both unit, mortar and hybrid failure modes, also including masonry crushing due to high-compression stresses, is proposed. Empirical and homogenisation formulae for inferring the elastic properties of interface between elements are also verified, enabling the proposed approach to be applied more broadly. Using this modelling strategy, the interaction between stiffness degradation and energy dissipation rate was accounted for numerically. Although the models marginally underestimate the energy dissipation in the case of slender piers, a good agreement was obtained in terms of lateral strength, hysteretic response, and crack pattern.<br/> © 2019 John Wiley & Sons, Ltd.},\nkey = {Aspect ratio},\n%keywords = {Energy dissipation;Numerical methods;Stiffness;Masonry materials;Textures;},\n%note = {Computational demands;cyclic;Distinct element methods;Distinct element modelling;Energy dissipation rate;Stiffness degradation;Structural assessments;Unreinforced masonry;},\nURL = {http://dx.doi.org/10.1002/eqe.3178},\n} \n\n\n
\n
\n\n\n
\n The in-plane capacity of unreinforced masonry (URM) elements may vary considerably depending on several factors, including boundary conditions, aspect ratio, vertical overburden, and masonry texture. Since the overall system resistance mainly relies on the in-plane lateral capacity of URM components when out-of-plane modes are adequately prevented, the structural assessment of URM structures could benefit from advanced numerical approaches able to account for these factors simultaneously. This paper aims at enhancing and optimising the employment of the distinct element method, currently confined to the analysis of local mechanisms of reduced-scale dry-joint blocky assemblies, with a view to simulate the experimentally observed responses of a series of URM full-scale specimens with mortared joints subjected to quasi-static in-plane cyclic loading. To this end, a mesoscale modelling approach is proposed that employs a simplified microscale modelling approach to effectively capture macroscale behaviour. Dynamic relaxation schemes are employed, in combination with time, size, and mass-scaling procedures, to decrease computational demand. A new methodology for numerically describing both unit, mortar and hybrid failure modes, also including masonry crushing due to high-compression stresses, is proposed. Empirical and homogenisation formulae for inferring the elastic properties of interface between elements are also verified, enabling the proposed approach to be applied more broadly. Using this modelling strategy, the interaction between stiffness degradation and energy dissipation rate was accounted for numerically. Although the models marginally underestimate the energy dissipation in the case of slender piers, a good agreement was obtained in terms of lateral strength, hysteretic response, and crack pattern.
© 2019 John Wiley & Sons, Ltd.\n
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\n \n\n \n \n \n \n \n \n Evaluation and optimization of a shock load de-icing method for transmission lines with combined ice failure criteria.\n \n \n \n \n\n\n \n Ji, K.; Liu, B.; Cheng, Y.; Zhan, X.; and McClure, G.\n\n\n \n\n\n\n Cold Regions Science and Technology, 165. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"EvaluationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192607092571 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evaluation and optimization of a shock load de-icing method for transmission lines with combined ice failure criteria},\njournal = {Cold Regions Science and Technology},\nauthor = {Ji, Kunpeng and Liu, Bin and Cheng, Yongfeng and Zhan, Xueping and McClure, Ghyslaine},\nvolume = {165},\nyear = {2019},\nissn = {0165232X},\nabstract = {A mechanical de-icing process for overhead transmission lines using shock load is investigated numerically by finite element analysis, where a combination of three validated ice failure criteria is implemented, namely- the maximum bending strain criterion, the tensile detachment criterion and the shear detachment criterion. A total of 25 numerical scenarios are established and the ice shedding ratio and dynamic response of overhead lines are studied. The goal is to assess the relative importance of the leading parameters that affect the efficiency of the shock-load deicing method and the corresponding transient effects. The parameters under study include: the shock load characteristics (amplitude, time history and applied location along the span), the ice accretion characteristics (equivalent thickness and eccentricity ratio), and the line profile (height difference of span suspension points and adjacent spans). The study leads to suggestions to improve the de-icing efficiency of the shock-load method and reduce the adverse transient effects on the line components. The modeling approach used in this study provides a cost-effective tool and helpful reference for design, evaluation and optimization of a variety of mechanical de-icing methods, devices and procedures.<br/> © 2019 Elsevier B.V.},\nkey = {Finite element method},\n%keywords = {Ice;Electric lines;Failure (mechanical);Efficiency;Cost effectiveness;Dynamics;Dynamic response;Snow and ice removal;},\n%note = {Cost effective;De-icing methods;Eccentricity ratios;Equivalent thickness;Failure criteria;Ice-shedding;Overhead transmission lines;Transient effect;},\nURL = {http://dx.doi.org/10.1016/j.coldregions.2019.102818},\n} \n\n\n
\n
\n\n\n
\n A mechanical de-icing process for overhead transmission lines using shock load is investigated numerically by finite element analysis, where a combination of three validated ice failure criteria is implemented, namely- the maximum bending strain criterion, the tensile detachment criterion and the shear detachment criterion. A total of 25 numerical scenarios are established and the ice shedding ratio and dynamic response of overhead lines are studied. The goal is to assess the relative importance of the leading parameters that affect the efficiency of the shock-load deicing method and the corresponding transient effects. The parameters under study include: the shock load characteristics (amplitude, time history and applied location along the span), the ice accretion characteristics (equivalent thickness and eccentricity ratio), and the line profile (height difference of span suspension points and adjacent spans). The study leads to suggestions to improve the de-icing efficiency of the shock-load method and reduce the adverse transient effects on the line components. The modeling approach used in this study provides a cost-effective tool and helpful reference for design, evaluation and optimization of a variety of mechanical de-icing methods, devices and procedures.
© 2019 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Strategies for modeling homogeneous isotropic turbulence and investigation of spatially correlated aerodynamic forces on a stationary model.\n \n \n \n \n\n\n \n Yu, J.; Li, M.; and Stathopoulos, T.\n\n\n \n\n\n\n Journal of Fluids and Structures, 90: 43 - 56. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"StrategiesPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192607091968 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Strategies for modeling homogeneous isotropic turbulence and investigation of spatially correlated aerodynamic forces on a stationary model},\njournal = {Journal of Fluids and Structures},\nauthor = {Yu, Jianhan and Li, Mingshui and Stathopoulos, Ted},\nvolume = {90},\nyear = {2019},\npages = {43 - 56},\nissn = {08899746},\nabstract = {A numerical simulation method is proposed for the generation of homogeneous isotropic turbulence and is applied to the investigation of the spanwise coherence aerodynamic force on a stationary airfoil. First, the inflow turbulence is generated by modeling a grid at the inlet of the computational domain. To verify the accuracy of the generated turbulence field, a series of relevant parameters are compared with the results of wind tunnel tests and previous studies. A model with NACA 0015 profile is then placed in the downstream turbulence. The relationship between the spanwise correlation width of the vertical turbulence component and the lift force is determined. Possible mechanisms for the result are discussed. This study demonstrates that the proposed turbulence generation method is an effective tool for investigating the spatial distribution of unsteady aerodynamic loads on elongated bodies.<br/> © 2019 Elsevier Ltd},\nkey = {Spatial distribution},\n%keywords = {Aerodynamics;Wind tunnels;Numerical models;Turbulence;Numerical methods;},\n%note = {Aerodynamic forces;Computational domains;Grid-generated turbulence;Homogeneous isotropic turbulence;Numerical simulation method;Spanwise correlation;Turbulence generation;Unsteady aerodynamic load;},\nURL = {http://dx.doi.org/10.1016/j.jfluidstructs.2019.06.002},\n} \n\n\n
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\n A numerical simulation method is proposed for the generation of homogeneous isotropic turbulence and is applied to the investigation of the spanwise coherence aerodynamic force on a stationary airfoil. First, the inflow turbulence is generated by modeling a grid at the inlet of the computational domain. To verify the accuracy of the generated turbulence field, a series of relevant parameters are compared with the results of wind tunnel tests and previous studies. A model with NACA 0015 profile is then placed in the downstream turbulence. The relationship between the spanwise correlation width of the vertical turbulence component and the lift force is determined. Possible mechanisms for the result are discussed. This study demonstrates that the proposed turbulence generation method is an effective tool for investigating the spatial distribution of unsteady aerodynamic loads on elongated bodies.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Use of Rigid Geofoam Insulation to Mitigate Frost Heave at Shallow Culvert Installations.\n \n \n \n \n\n\n \n Moussa, A.; Shalaby, A.; Kavanagh, L.; and Maghoul, P.\n\n\n \n\n\n\n Journal of Cold Regions Engineering, 33(3). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"UsePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192407051659 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Use of Rigid Geofoam Insulation to Mitigate Frost Heave at Shallow Culvert Installations},\njournal = {Journal of Cold Regions Engineering},\nauthor = {Moussa, Ahmed and Shalaby, Ahmed and Kavanagh, Leonnie and Maghoul, Pooneh},\nvolume = {33},\nnumber = {3},\nyear = {2019},\nissn = {0887381X},\nabstract = {Roadways over culverts experience severe distresses due to frost action in the subgrade. Thermal insulation placed near the culvert can reduce frost penetration in the soil surrounding the culvert. Three culvert sites backfilled with clay in Manitoba, Canada were instrumented with thermistors to monitor the changes in the soil thermal profile near culverts with and without thermal insulation placed below the culvert barrels. Temperature data from the instrumented sites were used to calibrate and validate a two-dimensional (2D) numerical model which was used in evaluating the performance of different placements of thermal insulation near culverts through a parametric study. The parametric study included evaluation of the use of thermal insulation above the culvert, below the culvert, and attached to the walls of culvert barrels to reduce the thermal disturbance in the soil. It was concluded that the least thermal disturbance in the soil was achieved when 75-mm thermal insulation was attached to the walls of the culvert. The outcomes of this study can be used to mitigate road roughness over culverts that is caused by frost action.<br/> © 2019 American Society of Civil Engineers.},\nkey = {Numerical models},\n%keywords = {Culverts;Heat transfer;Soils;Thermal insulation;},\n%note = {Frost penetrations;Manitoba , Canada;Parametric study;Phase Change;Temperature data;Thermal disturbance;Thermal profiles;Two Dimensional (2 D);},\nURL = {http://dx.doi.org/10.1061/(ASCE)CR.1943-5495.0000185},\n} \n\n\n
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\n Roadways over culverts experience severe distresses due to frost action in the subgrade. Thermal insulation placed near the culvert can reduce frost penetration in the soil surrounding the culvert. Three culvert sites backfilled with clay in Manitoba, Canada were instrumented with thermistors to monitor the changes in the soil thermal profile near culverts with and without thermal insulation placed below the culvert barrels. Temperature data from the instrumented sites were used to calibrate and validate a two-dimensional (2D) numerical model which was used in evaluating the performance of different placements of thermal insulation near culverts through a parametric study. The parametric study included evaluation of the use of thermal insulation above the culvert, below the culvert, and attached to the walls of culvert barrels to reduce the thermal disturbance in the soil. It was concluded that the least thermal disturbance in the soil was achieved when 75-mm thermal insulation was attached to the walls of the culvert. The outcomes of this study can be used to mitigate road roughness over culverts that is caused by frost action.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Characterization of cold in-place recycled materials at young age using shear wave velocity.\n \n \n \n \n\n\n \n Lecuru, Q.; Ethier, Y.; Carter, A.; and Karray, M.\n\n\n \n\n\n\n Advances in Civil Engineering Materials, 8(1). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"CharacterizationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192407021208 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Characterization of cold in-place recycled materials at young age using shear wave velocity},\njournal = {Advances in Civil Engineering Materials},\nauthor = {Lecuru, Quentin and Ethier, Yannic and Carter, Alan and Karray, Mourad},\nvolume = {8},\nnumber = {1},\nyear = {2019},\nissn = {23791357},\nabstract = {The characterization of cold recycled pavement materials at an early stage of their life, right after compaction, is difficult, especially if classical tests are used. Indeed, these materials at a very young age behave like granular materials, which affect the feasibility of the usual tests done on bituminous materials. Nondestructive techniques using wave propagation can be used to overcome this difficulty. The aim of this study is to evaluate if a method based on the spectral analysis of mechanical shear wave generated by piezoelectric rings (P-RAT method) can be used to characterize a cold in-place recycled material treated with an asphalt emulsion at a young age. Shear waves are used here because of the water content of such materials at early age. Such material can contain 10 % of water by volume before compaction. Shear wave allows the characterization of the skeleton of aggregates and bituminous binder (i.e., the asphalt concrete) with no interference from the pore water, thanks to the zero shearing resistance of the water. The tests show a strong link between water disappearance inside the specimen during the cure and the evolution of shear wave propagation velocity in the specimen. Moreover, water disappearance can be easily related to the evolution of |E*| in the specimen, allowing the characterization of this material using the evolution of the shear wave propagation velocity.<br/> © 2019 ASTM International. All rights reserved.},\nkey = {Shear waves},\n%keywords = {Piezoelectricity;Wave propagation;Compaction;Concrete aggregates;Recycling;Spectrum analysis;Shear flow;Asphalt pavements;},\n%note = {Cold-recycled;Early age;Frequency Analysis;Piezoelectric elements;Shear wave velocity;},\nURL = {http://dx.doi.org/10.1520/ACEM20180104},\n} \n\n\n
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\n The characterization of cold recycled pavement materials at an early stage of their life, right after compaction, is difficult, especially if classical tests are used. Indeed, these materials at a very young age behave like granular materials, which affect the feasibility of the usual tests done on bituminous materials. Nondestructive techniques using wave propagation can be used to overcome this difficulty. The aim of this study is to evaluate if a method based on the spectral analysis of mechanical shear wave generated by piezoelectric rings (P-RAT method) can be used to characterize a cold in-place recycled material treated with an asphalt emulsion at a young age. Shear waves are used here because of the water content of such materials at early age. Such material can contain 10 % of water by volume before compaction. Shear wave allows the characterization of the skeleton of aggregates and bituminous binder (i.e., the asphalt concrete) with no interference from the pore water, thanks to the zero shearing resistance of the water. The tests show a strong link between water disappearance inside the specimen during the cure and the evolution of shear wave propagation velocity in the specimen. Moreover, water disappearance can be easily related to the evolution of |E*| in the specimen, allowing the characterization of this material using the evolution of the shear wave propagation velocity.
© 2019 ASTM International. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Effects of Rock Foundation Roughness on the Sliding Stability of Concrete Gravity Dams Based on Topographic Surveys.\n \n \n \n \n\n\n \n Saichi, T.; Renaud, S.; Bouaanani, N.; and Miquel, B.\n\n\n \n\n\n\n Journal of Engineering Mechanics, 145(7). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"EffectsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191906868711 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effects of Rock Foundation Roughness on the Sliding Stability of Concrete Gravity Dams Based on Topographic Surveys},\njournal = {Journal of Engineering Mechanics},\nauthor = {Saichi, Tarik and Renaud, Sylvain and Bouaanani, Najib and Miquel, Benjamin},\nvolume = {145},\nnumber = {7},\nyear = {2019},\nissn = {07339399},\nabstract = {This paper investigates the effects of rock foundation roughness on the shear strength of dam-rock interfaces and dam sliding stability. For this purpose, bathymetric and light detection and ranging (LiDAR) surveys of existing rock foundation surfaces were carried out close to existing dam sites and processed to obtain realistic dam-rock interface geometries differing by their roughness. The generated rock profiles are implemented into nonlinear finite-element models to conduct stability analyses of two gravity dams differing by size. A detailed analysis of the nonlinear response of dam-rock interfaces is presented in terms of limit friction angles, sliding safety factors, dilation angles, apertures, dam displacements, and shear stresses. It is shown that global roughness along dam-rock interfaces can substantially increase their shear strength. Natural local shear keys at a dam-rock interface may greatly improve the sliding stability of gravity dams; however, their effect is found to be sensitive to dam size and rock mechanical properties. Roughness effects on shear strength are found to generally decrease for larger dams. The results also reveal that the influence of rock strength parameters is more significant when the rock foundation surface includes prominent natural shear keys.<br/> © 2019 American Society of Civil Engineers.},\nkey = {Shear flow},\n%keywords = {Bathymetry;Concretes;Foundations;Gravity dams;Surveys;Shear stress;Surface roughness;Rocks;Finite element method;Optical radar;Stability;Safety factor;},\n%note = {Concrete gravity dams;Light detection and ranging;Non-linear finite element model;Non-linear response;Rock interfaces;Sliding safety factors;Sliding stability;Topographic surveys;},\nURL = {http://dx.doi.org/10.1061/(ASCE)EM.1943-7889.0001604},\n} \n\n\n
\n
\n\n\n
\n This paper investigates the effects of rock foundation roughness on the shear strength of dam-rock interfaces and dam sliding stability. For this purpose, bathymetric and light detection and ranging (LiDAR) surveys of existing rock foundation surfaces were carried out close to existing dam sites and processed to obtain realistic dam-rock interface geometries differing by their roughness. The generated rock profiles are implemented into nonlinear finite-element models to conduct stability analyses of two gravity dams differing by size. A detailed analysis of the nonlinear response of dam-rock interfaces is presented in terms of limit friction angles, sliding safety factors, dilation angles, apertures, dam displacements, and shear stresses. It is shown that global roughness along dam-rock interfaces can substantially increase their shear strength. Natural local shear keys at a dam-rock interface may greatly improve the sliding stability of gravity dams; however, their effect is found to be sensitive to dam size and rock mechanical properties. Roughness effects on shear strength are found to generally decrease for larger dams. The results also reveal that the influence of rock strength parameters is more significant when the rock foundation surface includes prominent natural shear keys.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Integrating Batteries in the Future Swiss Electricity Supply System: A Consequential Environmental Assessment.\n \n \n \n \n\n\n \n Vandepaer, L.; Cloutier, J.; Bauer, C.; and Amor, B.\n\n\n \n\n\n\n Journal of Industrial Ecology, 23(3): 709 - 725. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"IntegratingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192407033101 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Integrating Batteries in the Future Swiss Electricity Supply System: A Consequential Environmental Assessment},\njournal = {Journal of Industrial Ecology},\nauthor = {Vandepaer, Laurent and Cloutier, Julie and Bauer, Christian and Amor, Ben},\nvolume = {23},\nnumber = {3},\nyear = {2019},\npages = {709 - 725},\nissn = {10881980},\nabstract = {Stationary batteries are projected to play a role in the electricity system of Switzerland after 2030. By enabling the integration of surplus production from intermittent renewables, energy storage units displace electricity production from different sources and potentially create environmental benefits. Nevertheless, batteries can also cause substantial environmental impacts during their manufacturing process and through the extraction of raw materials. A prospective consequential life cycle assessment (LCA) of lithium metal polymer and lithium-ion stationary batteries is undertaken to quantify potential environmental benefits and drawbacks. Projections are integrated into the LCA model: Energy scenarios are used to obtain marginal electricity supply mixes, and projections about the battery performances and the recycling process are sourced from the literature. The roles of key parameters and methodological choices in the results are systematically investigated. The results demonstrate that the displacement of marginal electricity sources determines the environmental implications of using batteries. In the reference scenario representing current policy, the displaced electricity mix is dominated by natural gas combined cycle units. In this scenario, the use of batteries generates environmental benefits in 12 of the 16 impact categories assessed. Nevertheless, there is a significant reduction in achievable environmental benefits when batteries are integrated into the power supply system in a low-carbon scenario because the marginal electricity production, displaced using batteries, already has a reduced environmental impact. The direct impacts of batteries mainly originate from upstream manufacturing processes, which consume electricity and mining activities related to the extraction of materials such as copper and bauxite.<br/> © 2018 by Yale University},\nkey = {Iron compounds},\n%keywords = {Electric power generation;Environmental impact;Manufacture;Extraction;Life cycle;Lithium compounds;Electric power systems;Lithium-ion batteries;Electric energy storage;},\n%note = {Electricity storages;Energy system model;Environmental assessment;Industrial ecology;Lithium iron phosphates;Marginal electricities;},\nURL = {http://dx.doi.org/10.1111/jiec.12774},\n} \n\n\n
\n
\n\n\n
\n Stationary batteries are projected to play a role in the electricity system of Switzerland after 2030. By enabling the integration of surplus production from intermittent renewables, energy storage units displace electricity production from different sources and potentially create environmental benefits. Nevertheless, batteries can also cause substantial environmental impacts during their manufacturing process and through the extraction of raw materials. A prospective consequential life cycle assessment (LCA) of lithium metal polymer and lithium-ion stationary batteries is undertaken to quantify potential environmental benefits and drawbacks. Projections are integrated into the LCA model: Energy scenarios are used to obtain marginal electricity supply mixes, and projections about the battery performances and the recycling process are sourced from the literature. The roles of key parameters and methodological choices in the results are systematically investigated. The results demonstrate that the displacement of marginal electricity sources determines the environmental implications of using batteries. In the reference scenario representing current policy, the displaced electricity mix is dominated by natural gas combined cycle units. In this scenario, the use of batteries generates environmental benefits in 12 of the 16 impact categories assessed. Nevertheless, there is a significant reduction in achievable environmental benefits when batteries are integrated into the power supply system in a low-carbon scenario because the marginal electricity production, displaced using batteries, already has a reduced environmental impact. The direct impacts of batteries mainly originate from upstream manufacturing processes, which consume electricity and mining activities related to the extraction of materials such as copper and bauxite.
© 2018 by Yale University\n
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\n \n\n \n \n \n \n \n \n Crop phenology retrieval via polarimetric SAR decomposition and Random Forest algorithm.\n \n \n \n \n\n\n \n Wang, H.; Magagi, R.; Goita, K.; Trudel, M.; McNairn, H.; and Powers, J.\n\n\n \n\n\n\n Remote Sensing of Environment, 231. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"CropPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192407032468 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Crop phenology retrieval via polarimetric SAR decomposition and Random Forest algorithm},\njournal = {Remote Sensing of Environment},\nauthor = {Wang, Hongquan and Magagi, Ramata and Goita, Kalifa and Trudel, Melanie and McNairn, Heather and Powers, Jarrett},\nvolume = {231},\nyear = {2019},\nissn = {00344257},\nabstract = {Knowledge of crop phenology assists in making agricultural decisions such as appropriate irrigation and fertilization applications in order to optimize crop yield. The objective of this study is to monitor crop phenology using Synthetic Aperture Radar (SAR) polarimetric decompositions and a random forest algorithm applied to a multi-temporal RADARSAT-2 dataset, acquired during the Soil Moisture Active Passive (SMAP) Validation Experiment 2016 in Manitoba (SMAPVEX16-MB). The model-based and eigen-based polarimetric parameters are used to separate the vegetation and soil scattering contributions in the total radar signal. As the crop morphological shape and structure vary with phenological growth, our study assumes that the polarimetric parameters related to the volume scattering mechanism have the potential to track the crop phenology. The sensitivity of the polarimetric parameters to the ground identified crop phenology is analyzed for different crop types. For canola, a single polarimetric parameter is sufficient to characterize the crop phenology, due to the high volume scattering power and large temporal dynamic. For corn, soybean and wheat, combinations of multiple polarimetric parameters are required. For each crop type, the Random Forest algorithm trained using 60% of the data is used to retrieve the crop phenology. Performances are compared to Artificial Neural Network, Support Vector Machine Regression and k-Nearest neighborhood algorithms. The Random Forest algorithm provides the best phenology retrieval with significant (p-value < 0.01) spearman correlation coefficients (between the retrieved and ground identified phenology) of 0.93, 0.90, 0.85 and 0.91 for canola, corn, soybean and wheat, respectively. While a single polarimetric parameter demonstrates limited sensitivity to corn phenology, the retrieved phenology from the Random Forest algorithm using multiple polarimetric parameters agrees well with the ground measurements. Furthermore, the importance of different polarimetric parameters for phenology retrieval using the Random Forest algorithm is quantified for different crop types. These findings will be of interest in developing future analytical retrieval models.<br/> © 2019 Elsevier Inc.},\nkey = {Crops},\n%keywords = {Support vector machines;Biology;Synthetic aperture radar;Nearest neighbor search;Neural networks;Polarimeters;Decision trees;Parameter estimation;Soil moisture;},\n%note = {Crop phenology;Polarimetric decomposition;Radarsat-2;Random forest algorithm;SMAPVEX16-MB;},\nURL = {http://dx.doi.org/10.1016/j.rse.2019.111234},\n} \n\n\n
\n
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\n Knowledge of crop phenology assists in making agricultural decisions such as appropriate irrigation and fertilization applications in order to optimize crop yield. The objective of this study is to monitor crop phenology using Synthetic Aperture Radar (SAR) polarimetric decompositions and a random forest algorithm applied to a multi-temporal RADARSAT-2 dataset, acquired during the Soil Moisture Active Passive (SMAP) Validation Experiment 2016 in Manitoba (SMAPVEX16-MB). The model-based and eigen-based polarimetric parameters are used to separate the vegetation and soil scattering contributions in the total radar signal. As the crop morphological shape and structure vary with phenological growth, our study assumes that the polarimetric parameters related to the volume scattering mechanism have the potential to track the crop phenology. The sensitivity of the polarimetric parameters to the ground identified crop phenology is analyzed for different crop types. For canola, a single polarimetric parameter is sufficient to characterize the crop phenology, due to the high volume scattering power and large temporal dynamic. For corn, soybean and wheat, combinations of multiple polarimetric parameters are required. For each crop type, the Random Forest algorithm trained using 60% of the data is used to retrieve the crop phenology. Performances are compared to Artificial Neural Network, Support Vector Machine Regression and k-Nearest neighborhood algorithms. The Random Forest algorithm provides the best phenology retrieval with significant (p-value < 0.01) spearman correlation coefficients (between the retrieved and ground identified phenology) of 0.93, 0.90, 0.85 and 0.91 for canola, corn, soybean and wheat, respectively. While a single polarimetric parameter demonstrates limited sensitivity to corn phenology, the retrieved phenology from the Random Forest algorithm using multiple polarimetric parameters agrees well with the ground measurements. Furthermore, the importance of different polarimetric parameters for phenology retrieval using the Random Forest algorithm is quantified for different crop types. These findings will be of interest in developing future analytical retrieval models.
© 2019 Elsevier Inc.\n
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\n \n\n \n \n \n \n \n \n Refining a Polarimetric Decomposition of Multi-Angular UAVSAR Time Series for Soil Moisture Retrieval over Low and High Vegetated Agricultural Fields.\n \n \n \n \n\n\n \n Wang, H.; Magagi, R.; Goita, K.; and Jagdhuber, T.\n\n\n \n\n\n\n IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 12(5): 1431 - 1450. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"RefiningPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192407040119 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Refining a Polarimetric Decomposition of Multi-Angular UAVSAR Time Series for Soil Moisture Retrieval over Low and High Vegetated Agricultural Fields},\njournal = {IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing},\nauthor = {Wang, Hongquan and Magagi, Ramata and Goita, Kalifa and Jagdhuber, Thomas},\nvolume = {12},\nnumber = {5},\nyear = {2019},\npages = {1431 - 1450},\nissn = {19391404},\nabstract = {The model-based polarimetric decomposition under multi-angular condition is refined to estimate soil moisture over agricultural fields covered by different crops from Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) time series. The approach allows to disentangle the vegetation and ground scattering components in order to invert the latter for the retrieval of soil moisture. For the vegetation volume separation, the crop orientations were estimated from SAR observations acquired at different incidence angles, and the associated volume scattering component was subtracted from each acquisition individually. Afterward, the soil moisture was retrieved from both ground scattering components (surface, dihedral), using the developed multi-angular cost functions comprised of dominant Bragg surface (β) or Fresnel dihedral (α) scattering parameters. Compared to former soil moisture retrievals from model-based decomposition of multi-angular polarimetric SAR data, the present refined approach that integrated both ground components, surface and dihedral, is independent of the power attenuation and loss during the microwave propagation through the vegetation. In this way, the ambiguity in the dihedral scattering component (most prominent around 45° incidence angle) was overcome, enabling a more robust retrieval methodology by clearly decoupling the soil and vegetation dielectric constants. The proposed multi-angular approach for soil moisture retrieval was validated with respect to the ground measurements conducted during the Soil Moisture Active Passive Validation Experiment in 2012. Due to the increased number of valid dominant surface/dihedral components which are used to retrieve the soil moisture in the multi-angular approach, an overall retrieval rate of 90%, significantly higher than that of the single-angular condition (50%), is obtained. The results indicate an overall retrieval rmse of 0.07-0.09 m<sup>3</sup>/m<sup>3</sup> for the early crop growth stage, and a rmse of 0.09-0.12 m<sup>3</sup>/m<sup>3</sup> for the later crop development until mature stage. However, the retrieval performance is highly dependent on the crop structure and phenological development stages, but the multi-angular rmse range is mostly lower than all single-angular rmses, indicating better quality of the multi-angular inversion than the single-angular one.<br/> © 2008-2012 IEEE.},\nkey = {Soil moisture},\n%keywords = {Soil surveys;Synthetic aperture radar;Antennas;Time series;Cost functions;Ellipsometry;Polarimeters;Surface scattering;Vegetation;Crops;},\n%note = {Ground measurements;Microwave propagation;Model based decompositions;multi-angular SAR;Polarimetric decomposition;SMAPVEX12;Soil moisture retrievals;Uninhabited aerial vehicle;},\nURL = {http://dx.doi.org/10.1109/JSTARS.2019.2909984},\n} \n\n\n
\n
\n\n\n
\n The model-based polarimetric decomposition under multi-angular condition is refined to estimate soil moisture over agricultural fields covered by different crops from Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) time series. The approach allows to disentangle the vegetation and ground scattering components in order to invert the latter for the retrieval of soil moisture. For the vegetation volume separation, the crop orientations were estimated from SAR observations acquired at different incidence angles, and the associated volume scattering component was subtracted from each acquisition individually. Afterward, the soil moisture was retrieved from both ground scattering components (surface, dihedral), using the developed multi-angular cost functions comprised of dominant Bragg surface (β) or Fresnel dihedral (α) scattering parameters. Compared to former soil moisture retrievals from model-based decomposition of multi-angular polarimetric SAR data, the present refined approach that integrated both ground components, surface and dihedral, is independent of the power attenuation and loss during the microwave propagation through the vegetation. In this way, the ambiguity in the dihedral scattering component (most prominent around 45° incidence angle) was overcome, enabling a more robust retrieval methodology by clearly decoupling the soil and vegetation dielectric constants. The proposed multi-angular approach for soil moisture retrieval was validated with respect to the ground measurements conducted during the Soil Moisture Active Passive Validation Experiment in 2012. Due to the increased number of valid dominant surface/dihedral components which are used to retrieve the soil moisture in the multi-angular approach, an overall retrieval rate of 90%, significantly higher than that of the single-angular condition (50%), is obtained. The results indicate an overall retrieval rmse of 0.07-0.09 m3/m3 for the early crop growth stage, and a rmse of 0.09-0.12 m3/m3 for the later crop development until mature stage. However, the retrieval performance is highly dependent on the crop structure and phenological development stages, but the multi-angular rmse range is mostly lower than all single-angular rmses, indicating better quality of the multi-angular inversion than the single-angular one.
© 2008-2012 IEEE.\n
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\n \n\n \n \n \n \n \n \n Microbial risk associated with CSOs upstream of drinking water sources in a transboundary river using hydrodynamic and water quality modeling.\n \n \n \n \n\n\n \n Taghipour, M.; Shakibaeinia, A.; Sylvestre, E.; Tolouei, S.; and Dorner, S.\n\n\n \n\n\n\n Science of the Total Environment, 683: 547 - 558. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"MicrobialPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192206980950 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Microbial risk associated with CSOs upstream of drinking water sources in a transboundary river using hydrodynamic and water quality modeling},\njournal = {Science of the Total Environment},\nauthor = {Taghipour, Milad and Shakibaeinia, Ahmad and Sylvestre, Emile and Tolouei, Samira and Dorner, Sarah},\nvolume = {683},\nyear = {2019},\npages = {547 - 558},\nissn = {00489697},\nabstract = {Urban source water protection planning requires the characterization of sources of contamination upstream of drinking water intakes. Elevated pathogen concentrations following Combined Sewer Overflows (CSOs) represent a threat to human health. Quantifying peak pathogen concentrations at the intakes of drinking water plants is a challenge due to the variability of CSO occurrences and uncertainties with regards to the fate and transport mechanisms from discharge points to source water supplies. Here, a two-dimensional deterministic hydrodynamic and water quality model is used to study the fluvial contaminant transport and the impacts of the upstream CSO discharges on the downstream concentrations of Escherichia coli in the raw water supply of two drinking water plants, located on a large river. CSO dynamic loading characteristics were considered for a variety of discharges. As a result of limited Cryptosporidium data, a probability distribution of the ratio of E. coli to Cryptosporidium based on historical data was used to estimate microbial risk from simulated CSO-induced E. coli concentrations. During optimal operational performance of the plants, the daily risk target was met (based on the mean concentration during the peak) for 80% to 90% of CSO events. For suboptimal performance of the plants, these values dropped to 40% to 55%. Mean annual microbial risk following CSO discharge events was more dependent on treatment performance rather than the number of CSO occurrences. The effect of CSO-associated short term risk on the mean annual risk is largely dependent on the treatment performance as well as representativeness of the baseline condition at the intakes, demonstrating the need for assessment of treatment efficacy. The results of this study will enable water utilities and managers with a tool to investigate the potential alternatives in reducing the microbial risk associated with CSOs.<br/> © 2019 Elsevier B.V.},\nkey = {Escherichia coli},\n%keywords = {River pollution;Water quality;Hydrodynamics;Potable water;Risk assessment;Water supply systems;Water supply;Dynamic loads;Rivers;Risk perception;Health risks;Probability distributions;},\n%note = {Combined sewer overflows;Cryptosporidium;Drinking water sources;Event-based;Hydrodynamic and water quality models;Operational performance;Source water protection;Sub-optimal performance;},\nURL = {http://dx.doi.org/10.1016/j.scitotenv.2019.05.130},\n} \n\n\n
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\n Urban source water protection planning requires the characterization of sources of contamination upstream of drinking water intakes. Elevated pathogen concentrations following Combined Sewer Overflows (CSOs) represent a threat to human health. Quantifying peak pathogen concentrations at the intakes of drinking water plants is a challenge due to the variability of CSO occurrences and uncertainties with regards to the fate and transport mechanisms from discharge points to source water supplies. Here, a two-dimensional deterministic hydrodynamic and water quality model is used to study the fluvial contaminant transport and the impacts of the upstream CSO discharges on the downstream concentrations of Escherichia coli in the raw water supply of two drinking water plants, located on a large river. CSO dynamic loading characteristics were considered for a variety of discharges. As a result of limited Cryptosporidium data, a probability distribution of the ratio of E. coli to Cryptosporidium based on historical data was used to estimate microbial risk from simulated CSO-induced E. coli concentrations. During optimal operational performance of the plants, the daily risk target was met (based on the mean concentration during the peak) for 80% to 90% of CSO events. For suboptimal performance of the plants, these values dropped to 40% to 55%. Mean annual microbial risk following CSO discharge events was more dependent on treatment performance rather than the number of CSO occurrences. The effect of CSO-associated short term risk on the mean annual risk is largely dependent on the treatment performance as well as representativeness of the baseline condition at the intakes, demonstrating the need for assessment of treatment efficacy. The results of this study will enable water utilities and managers with a tool to investigate the potential alternatives in reducing the microbial risk associated with CSOs.
© 2019 Elsevier B.V.\n
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\n \n\n \n \n \n \n \n \n Once upon a Time in Italy: The Tale of the Morandi Bridge.\n \n \n \n \n\n\n \n Calvi, G. M.; Moratti, M.; O'Reilly, G. J.; Scattarreggia, N.; Monteiro, R.; Malomo, D.; Calvi, P. M.; and Pinho, R.\n\n\n \n\n\n\n Structural Engineering International, 29(2): 198 - 217. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"OncePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191806862297 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Once upon a Time in Italy: The Tale of the Morandi Bridge},\njournal = {Structural Engineering International},\nauthor = {Calvi, Gian Michele and Moratti, Matteo and O'Reilly, Gerard J. and Scattarreggia, Nicola and Monteiro, Ricardo and Malomo, Daniele and Calvi, Paolo Martino and Pinho, Rui},\nvolume = {29},\nnumber = {2},\nyear = {2019},\npages = {198 - 217},\nissn = {10168664},\nabstract = {On 14 August 2018 at 11:35 AM, a relevant portion (about 243 m) of the viaduct over the Polcevera river in Genoa collapsed, killing 43 people. The bridge was designed in the early 1960s by Riccardo Morandi, a well-known Italian engineer, and opened to the public in 1967. The collapsed part of the bridge essentially comprised an individual self-standing structure spanning 171 m and two simply-supported connecting Gerber beam systems, each spanning 36 m from the self-standing structure to the adjacent portions of the bridge. This paper aims to reminisce the complete story of the bridge, from the Italian construction boom in the 1960s to some of the issues that soon arose thereafter: the strengthening intervention in the 1990s, the subsequent structural monitoring and, finally, the strengthening project never brought to fruition. Potential reasons for the collapse are discussed, together with some of the possible inadequacies of the bridge, its maintenance and loading history based on critical reflection, comparison with specific features of bridge construction practice today and results obtained using numerical models with different levels of refinement. Since the entire matter (specifically the debris) was considered classified by the investigating magistrate in the immediate aftermath of the bridge collapse, this work is based entirely on publicly available material.<br/> © 2019, © 2019 International Association for Bridge and Structural Engineering (IABSE).},\nkey = {Forensic engineering},\n%keywords = {Forensic science;Bridges;},\n%note = {Bridge collapse;Bridge constructions;Construction boom;Critical reflections;Loading history;Simply supported;Structural collapse;Structural monitoring;},\nURL = {http://dx.doi.org/10.1080/10168664.2018.1558033},\n} \n\n\n
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\n On 14 August 2018 at 11:35 AM, a relevant portion (about 243 m) of the viaduct over the Polcevera river in Genoa collapsed, killing 43 people. The bridge was designed in the early 1960s by Riccardo Morandi, a well-known Italian engineer, and opened to the public in 1967. The collapsed part of the bridge essentially comprised an individual self-standing structure spanning 171 m and two simply-supported connecting Gerber beam systems, each spanning 36 m from the self-standing structure to the adjacent portions of the bridge. This paper aims to reminisce the complete story of the bridge, from the Italian construction boom in the 1960s to some of the issues that soon arose thereafter: the strengthening intervention in the 1990s, the subsequent structural monitoring and, finally, the strengthening project never brought to fruition. Potential reasons for the collapse are discussed, together with some of the possible inadequacies of the bridge, its maintenance and loading history based on critical reflection, comparison with specific features of bridge construction practice today and results obtained using numerical models with different levels of refinement. Since the entire matter (specifically the debris) was considered classified by the investigating magistrate in the immediate aftermath of the bridge collapse, this work is based entirely on publicly available material.
© 2019, © 2019 International Association for Bridge and Structural Engineering (IABSE).\n
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\n \n\n \n \n \n \n \n \n On the seismic fragility assessment of concrete gravity dams in eastern Canada.\n \n \n \n \n\n\n \n Segura, R.; Bernier, C.; Monteiro, R.; and Paultre, P.\n\n\n \n\n\n\n Earthquake Spectra, 55(1): 211 - 231. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"OnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191806852000 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {On the seismic fragility assessment of concrete gravity dams in eastern Canada},\njournal = {Earthquake Spectra},\nauthor = {Segura, Rocio and Bernier, Carl and Monteiro, Ricardo and Paultre, Patrick},\nvolume = {55},\nnumber = {1},\nyear = {2019},\npages = {211 - 231},\nissn = {87552930},\nabstract = {<div data-language="eng" data-ev-field="abstract">In recent years, probabilistic methods, such as fragility analysis, have emerged as reliable tools for the seismic assessment of dam-type structures. These methods require the selection of a representative suite of ground motion records, resulting in the need for a ground motion selection method that includes all the relevant ground motion parameters in the fragility analysis of this type of structure. This article presents the development of up-to-date fragility curves for the sliding limit states of gravity dams in Eastern Canada using a record selection method based on the generalized conditional intensity measure approach. These fragility functions are then combined with the recently developed regional hazard data to evaluate the annual risk, which is measured in terms of the unconditional probability of limit state exceedance. The proposed methodology is applied to a case study dam in northeastern Canada, whose fragility is assessed through comparison with previous studies and current safety guidelines. It is observed that the more accurate procedure proposed herein produces less conservative fragility estimates for the case study dam.<br/></div> © 2019, Earthquake Engineering Research Institute},\nkey = {Gravity dams},\n%keywords = {Concrete dams;Concretes;Risk assessment;Seismology;},\n%note = {Concrete gravity dams;Fragility analysis;Fragility function;Ground motion parameters;Ground motion selections;Probabilistic methods;Seismic assessment;Selection methods;},\nURL = {http://dx.doi.org/10.1193/012418EQS024M},\n} \n\n\n
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\n
In recent years, probabilistic methods, such as fragility analysis, have emerged as reliable tools for the seismic assessment of dam-type structures. These methods require the selection of a representative suite of ground motion records, resulting in the need for a ground motion selection method that includes all the relevant ground motion parameters in the fragility analysis of this type of structure. This article presents the development of up-to-date fragility curves for the sliding limit states of gravity dams in Eastern Canada using a record selection method based on the generalized conditional intensity measure approach. These fragility functions are then combined with the recently developed regional hazard data to evaluate the annual risk, which is measured in terms of the unconditional probability of limit state exceedance. The proposed methodology is applied to a case study dam in northeastern Canada, whose fragility is assessed through comparison with previous studies and current safety guidelines. It is observed that the more accurate procedure proposed herein produces less conservative fragility estimates for the case study dam.
© 2019, Earthquake Engineering Research Institute\n
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\n \n\n \n \n \n \n \n \n Seismic performance and height limits of ductile reinforced masonry shear wall buildings with boundary elements.\n \n \n \n \n\n\n \n Aly, N.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 190: 171 - 188. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191606794910 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic performance and height limits of ductile reinforced masonry shear wall buildings with boundary elements},\njournal = {Engineering Structures},\nauthor = {Aly, Nader and Galal, Khaled},\nvolume = {190},\nyear = {2019},\npages = {171 - 188},\nissn = {01410296},\nabstract = {The National Building Code of Canada, NBCC-15 has recently added a new Seismic Force Resisting System (SFRS) category, ductile shear walls, for Reinforced Masonry (RM) buildings. Although it was assigned a higher ductility-related force modification factor compared to that of moderately ductile walls, NBCC-15 assigned the same building height limits for the ductile and moderately ductile RM walls. This study aims to assess (i.e. numerically) the seismic performance and collapse capacity of ductile RM buildings, having heights exceeding the code limit, built using ductile RM shear walls with boundary elements as the SFRS. The main objective is to propose height limits based on solid and objective seismic performance acceptance criteria. In this regard, six archetype buildings with varying heights are designed according to CSA S304-14 with ductile RM structural walls having confined boundary elements. The reference buildings are located in two regions representing the high and moderate seismicity levels of NBCC-15. The seismic performance is evaluated using nonlinear pseudo-static pushover and Incremental Dynamic Analyses (IDA). The quantification of seismic performance and collapse capacity is executed using the procedure outlined in FEMA P695. This research study contributes to the understanding of the seismic performance and collapse capacity of ductile RM shear wall buildings with boundary elements. It provides practical design recommendations to enhance the overall system performance. In addition, the study proposes a simple, yet efficient nonlinear numerical macro-modeling approach for RM shear walls. Finally, based on the findings of this study, it is suggested to assign a 70 m limit for the height of buildings in moderate seismicity regions and a 50 m limit for the buildings in regions with high seismic hazard.<br/> © 2019 Elsevier Ltd},\nkey = {Shear walls},\n%keywords = {Nonlinear analysis;Masonry materials;Seismology;Reinforcement;Seismic design;Ductility;Seismic waves;},\n%note = {Boundary elements;Building height;Collapse fragilities;FEMA P695;Seismic Performance;Seismostruct;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2019.03.090},\n} \n\n\n
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\n The National Building Code of Canada, NBCC-15 has recently added a new Seismic Force Resisting System (SFRS) category, ductile shear walls, for Reinforced Masonry (RM) buildings. Although it was assigned a higher ductility-related force modification factor compared to that of moderately ductile walls, NBCC-15 assigned the same building height limits for the ductile and moderately ductile RM walls. This study aims to assess (i.e. numerically) the seismic performance and collapse capacity of ductile RM buildings, having heights exceeding the code limit, built using ductile RM shear walls with boundary elements as the SFRS. The main objective is to propose height limits based on solid and objective seismic performance acceptance criteria. In this regard, six archetype buildings with varying heights are designed according to CSA S304-14 with ductile RM structural walls having confined boundary elements. The reference buildings are located in two regions representing the high and moderate seismicity levels of NBCC-15. The seismic performance is evaluated using nonlinear pseudo-static pushover and Incremental Dynamic Analyses (IDA). The quantification of seismic performance and collapse capacity is executed using the procedure outlined in FEMA P695. This research study contributes to the understanding of the seismic performance and collapse capacity of ductile RM shear wall buildings with boundary elements. It provides practical design recommendations to enhance the overall system performance. In addition, the study proposes a simple, yet efficient nonlinear numerical macro-modeling approach for RM shear walls. Finally, based on the findings of this study, it is suggested to assign a 70 m limit for the height of buildings in moderate seismicity regions and a 50 m limit for the buildings in regions with high seismic hazard.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n A laboratory-based study correlating cone penetration test resistance to the physical parameters of uncemented sand mixtures and granular soils.\n \n \n \n \n\n\n \n Ghali, M.; Chekired, M.; and Karray, M.\n\n\n \n\n\n\n Engineering Geology, 255: 11 - 25. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"APaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191706825287 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A laboratory-based study correlating cone penetration test resistance to the physical parameters of uncemented sand mixtures and granular soils},\njournal = {Engineering Geology},\nauthor = {Ghali, Michael and Chekired, Mohamed and Karray, Mourad},\nvolume = {255},\nyear = {2019},\npages = {11 - 25},\nissn = {00137952},\nabstract = {The influences of gradation curve properties and particle shape on the cone penetration test (CPT) resistances of normally consolidated clean sand under different relative densities were studied. The proposed empirical correlations were developed based on the experimental results of a laboratory CPT using an axisymmetric field simulator. The tests were performed on 18 different gradations of disturbed and premixed clean sands and 25 different gradations of fully spherical glass beads. The gradation curves and particle shapes of the tested sands were developed using laser scanning and image analyses. For a constant relative density, it was demonstrated that while the cone penetration tip resistance and the sleeve friction were slightly positively related to the mean grain size, they were significantly positively related to the uniformity coefficient and negatively related to the two-dimensional angularity of particles. A comparison between the trend in behavior of the current proposed empirical formulas with the frequently used empirical equations formulated in terms of relative density was presented. The applicability and limitations of the proposed relations were verified on a large dataset from the literature and on highly accurate field data of two sites in Canada.<br/> © 2019},\nkey = {Sand},\n%keywords = {Grain size and shape;Friction;Particle size analysis;Soil testing;Large dataset;},\n%note = {Experimental investigations;Improved relationship;Mean-grain size;Sleeve friction;Tip resistance;Uniformity coefficient;},\nURL = {http://dx.doi.org/10.1016/j.enggeo.2019.04.015},\n} \n\n\n
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\n The influences of gradation curve properties and particle shape on the cone penetration test (CPT) resistances of normally consolidated clean sand under different relative densities were studied. The proposed empirical correlations were developed based on the experimental results of a laboratory CPT using an axisymmetric field simulator. The tests were performed on 18 different gradations of disturbed and premixed clean sands and 25 different gradations of fully spherical glass beads. The gradation curves and particle shapes of the tested sands were developed using laser scanning and image analyses. For a constant relative density, it was demonstrated that while the cone penetration tip resistance and the sleeve friction were slightly positively related to the mean grain size, they were significantly positively related to the uniformity coefficient and negatively related to the two-dimensional angularity of particles. A comparison between the trend in behavior of the current proposed empirical formulas with the frequently used empirical equations formulated in terms of relative density was presented. The applicability and limitations of the proposed relations were verified on a large dataset from the literature and on highly accurate field data of two sites in Canada.
© 2019\n
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\n \n\n \n \n \n \n \n \n Roughness Effects on the Shear Strength of Concrete and Rock Joints in Dams Based on Experimental Data.\n \n \n \n \n\n\n \n Renaud, S.; Saichi, T.; Bouaanani, N.; Miquel, B.; Quirion, M.; and Rivard, P.\n\n\n \n\n\n\n Rock Mechanics and Rock Engineering, 52(10): 3867 - 3888. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"RoughnessPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191706833591 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Roughness Effects on the Shear Strength of Concrete and Rock Joints in Dams Based on Experimental Data},\njournal = {Rock Mechanics and Rock Engineering},\nauthor = {Renaud, Sylvain and Saichi, Tarik and Bouaanani, Najib and Miquel, Benjamin and Quirion, Marco and Rivard, Patrice},\nvolume = {52},\nnumber = {10},\nyear = {2019},\npages = {3867 - 3888},\nissn = {07232632},\nabstract = {This paper investigates the effects of joint roughness on shear strength based on experimental data obtained from shear tests on 18 specimens presenting an unbonded contact interface, i.e., fully open with no bond, drilled from concrete, concrete–rock, and rock joints in existing dams. Original and practical procedures are developed to numerically process 3D profiles of laser-scanned interfaces of the tested contact specimens, and then evaluate the corresponding roughness parameters for the prediction of joint shear strength. Orientation-dependent joint roughness coefficient (JRC) and joint matching coefficient (JMC) are also proposed to investigate roughness effects as a function of shearing direction. The analysis of the experimental results confirmed that the contribution of roughness to the shear strength of a dam joint has to be considered. Furthermore, the results suggest that only little shear-induced degradation occurs along the contact specimens during the tests. Shear strength values from shear tests conducted on contact specimens are compared to predictions using an analytical equation adapted to include the orientation-dependent JRC and JMC. The results highlight the significant role of roughness and matching properties on the shear strength of unbonded natural joints, although the quality of the predictions was found to be sensitive to the selection of the residual friction angle &straightphi;<inf>r</inf> and the joint compressive strength JCS. It is also found that joint roughness and matching depends on shear direction which can significantly affect shear strength predictions. These results clearly illustrate the need for sensitivity analyses to evaluate the variation of joint shear strength should a potential dam sliding occur along a direction different from the one adopted during shear tests.<br/> © 2019, Springer-Verlag GmbH Austria, part of Springer Nature.},\nkey = {Compressive strength},\n%keywords = {Dams;Shear flow;Testing;Shear strength;Concrete testing;Forecasting;Sensitivity analysis;Concretes;},\n%note = {3-d scans;Joint roughness coefficients;Joint shear strengths;Matching coefficients;Orientation dependent;Practical procedures;Shear strength predictions;Shear tests;},\nURL = {http://dx.doi.org/10.1007/s00603-019-01803-x},\n} \n\n\n
\n
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\n This paper investigates the effects of joint roughness on shear strength based on experimental data obtained from shear tests on 18 specimens presenting an unbonded contact interface, i.e., fully open with no bond, drilled from concrete, concrete–rock, and rock joints in existing dams. Original and practical procedures are developed to numerically process 3D profiles of laser-scanned interfaces of the tested contact specimens, and then evaluate the corresponding roughness parameters for the prediction of joint shear strength. Orientation-dependent joint roughness coefficient (JRC) and joint matching coefficient (JMC) are also proposed to investigate roughness effects as a function of shearing direction. The analysis of the experimental results confirmed that the contribution of roughness to the shear strength of a dam joint has to be considered. Furthermore, the results suggest that only little shear-induced degradation occurs along the contact specimens during the tests. Shear strength values from shear tests conducted on contact specimens are compared to predictions using an analytical equation adapted to include the orientation-dependent JRC and JMC. The results highlight the significant role of roughness and matching properties on the shear strength of unbonded natural joints, although the quality of the predictions was found to be sensitive to the selection of the residual friction angle ϕr and the joint compressive strength JCS. It is also found that joint roughness and matching depends on shear direction which can significantly affect shear strength predictions. These results clearly illustrate the need for sensitivity analyses to evaluate the variation of joint shear strength should a potential dam sliding occur along a direction different from the one adopted during shear tests.
© 2019, Springer-Verlag GmbH Austria, part of Springer Nature.\n
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\n \n\n \n \n \n \n \n \n Seismic performance parameters of fully grouted reinforced masonry squat shear walls.\n \n \n \n \n\n\n \n Seif ElDin, H. M.; Ashour, A.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 187: 518 - 527. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191106620910 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic performance parameters of fully grouted reinforced masonry squat shear walls},\njournal = {Engineering Structures},\nauthor = {Seif ElDin, Hany M. and Ashour, Ahmed and Galal, Khaled},\nvolume = {187},\nyear = {2019},\npages = {518 - 527},\nissn = {01410296},\nabstract = {The displacement ductility, ductility-related seismic force modification factor, and the effective elastic stiffness are important force-based seismic design (FBD) parameters for reinforced masonry (RM) shear walls. In addition, stiffness degradation and equivalent viscous damping, are crucial displacement-based seismic design (DBD) parameters. This study analyzes previously reported test results of eight RM shear-dominated fully-grouted rectangular squat walls subjected to cyclic lateral excitations to evaluate the FBD and DBD parameters. The main variables of the tested walls are the level of axial compressive stress, vertical and horizontal reinforcement ratio, anchorage end detail, and the spacing of horizontal and vertical reinforcement. However, all tested walls had the same shear span to depth ratio equal to 1.25. The evaluated FBD parameters are compared to the Canadian, European and American standards. Moreover, based on the analysis, equations for the stiffness degradation of RM shear walls relative to their top drift limit or displacement ductility, are developed and presented for the examined walls. The ductility-related seismic force modification factor is computed on average 2.6, and 3.9, based on equal energy and equal displacement idealization, respectively. The US, and European standards ignore the axial stress effect on wall's elastic effective stiffness and highly overestimate its value for the tested walls. This study presents, based on the tested walls, a guide design values for squat shear-dominated walls category that can be used in FBD and DBD.<br/> © 2019 Elsevier Ltd},\nkey = {Ductility},\n%keywords = {Reinforcement;Seismic design;Seismology;Shear walls;Compressive stress;Concrete construction;Seismic waves;Damping;Grouting;Stiffness;Mortar;},\n%note = {Equivalent viscous damping;Reinforced masonry;Seismic force modification factor;Seismic Performance;Stiffness degradation;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2019.02.069},\n} \n\n\n
\n
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\n The displacement ductility, ductility-related seismic force modification factor, and the effective elastic stiffness are important force-based seismic design (FBD) parameters for reinforced masonry (RM) shear walls. In addition, stiffness degradation and equivalent viscous damping, are crucial displacement-based seismic design (DBD) parameters. This study analyzes previously reported test results of eight RM shear-dominated fully-grouted rectangular squat walls subjected to cyclic lateral excitations to evaluate the FBD and DBD parameters. The main variables of the tested walls are the level of axial compressive stress, vertical and horizontal reinforcement ratio, anchorage end detail, and the spacing of horizontal and vertical reinforcement. However, all tested walls had the same shear span to depth ratio equal to 1.25. The evaluated FBD parameters are compared to the Canadian, European and American standards. Moreover, based on the analysis, equations for the stiffness degradation of RM shear walls relative to their top drift limit or displacement ductility, are developed and presented for the examined walls. The ductility-related seismic force modification factor is computed on average 2.6, and 3.9, based on equal energy and equal displacement idealization, respectively. The US, and European standards ignore the axial stress effect on wall's elastic effective stiffness and highly overestimate its value for the tested walls. This study presents, based on the tested walls, a guide design values for squat shear-dominated walls category that can be used in FBD and DBD.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n In-plane shear strength equation for fully grouted reinforced masonry shear walls.\n \n \n \n \n\n\n \n Seif ElDin, H. M.; Aly, N.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 190: 319 - 332. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"In-planePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20191606802747 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {In-plane shear strength equation for fully grouted reinforced masonry shear walls},\njournal = {Engineering Structures},\nauthor = {Seif ElDin, Hany M. and Aly, Nader and Galal, Khaled},\nvolume = {190},\nyear = {2019},\npages = {319 - 332},\nissn = {01410296},\nabstract = {The flexural behavior of reinforced masonry (RM) shear walls is well defined and follows the simple flexural theory of reinforced concrete structures based on plane-section assumption. Conversely, the shear behavior of RM shear walls in the plastic hinge region is more complex due to the lack of comprehensive models that quantifies the interaction of the various mechanisms that contribute to the shear capacity. This paper aims to provide a comprehensive equation for predicting the in-plane shear strength, V<inf>n</inf>, of RM shear walls. The proposed equation was verified against the results of 68 full-scale fully grouted RM shear walls from six sources in the literature tested under cyclic lateral excitations. The main variables considered in the experimental data were: the level of axial compressive stress, shear span to depth ratio, reinforcement ratio, anchorage end detail, and the spacing of reinforcement. Then, statistical analysis was performed to evaluate the precision of the proposed equation against ten widely-used equations, including the design equations given in the Canadian Standards Association CSA S304-14 (2014), the US Masonry Standards Joint Committee MSJC (2013), and the Standards Association of New Zealand NZS 4230:2004. The results of the statistical analysis show that the proposed equation provides a precise and sufficiently conservative prediction of the shear strength (V<inf>n</inf>). The proposed equation conservatively accounts for the contribution of masonry and axial load (V<inf>m+p</inf>), and horizontal reinforcement (V<inf>s</inf>) to the shear resistance (V<inf>n</inf>) while considering the influence of the level of ductility demand. It also considers the vertical reinforcement contribution to the in-plane shear strength.<br/> © 2019 Elsevier Ltd},\nkey = {Shear walls},\n%keywords = {Concrete construction;Shear strength;Mortar;Statistical methods;Reinforced concrete;Grouting;},\n%note = {Axial-compressive stress;Canadian standards associations;Design codes;Fully grouted;In-plane shear strength;Masonry standards joint committees;Reinforced masonry;Shear span-to-depth ratios;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2019.03.079},\n} \n\n\n
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\n The flexural behavior of reinforced masonry (RM) shear walls is well defined and follows the simple flexural theory of reinforced concrete structures based on plane-section assumption. Conversely, the shear behavior of RM shear walls in the plastic hinge region is more complex due to the lack of comprehensive models that quantifies the interaction of the various mechanisms that contribute to the shear capacity. This paper aims to provide a comprehensive equation for predicting the in-plane shear strength, Vn, of RM shear walls. The proposed equation was verified against the results of 68 full-scale fully grouted RM shear walls from six sources in the literature tested under cyclic lateral excitations. The main variables considered in the experimental data were: the level of axial compressive stress, shear span to depth ratio, reinforcement ratio, anchorage end detail, and the spacing of reinforcement. Then, statistical analysis was performed to evaluate the precision of the proposed equation against ten widely-used equations, including the design equations given in the Canadian Standards Association CSA S304-14 (2014), the US Masonry Standards Joint Committee MSJC (2013), and the Standards Association of New Zealand NZS 4230:2004. The results of the statistical analysis show that the proposed equation provides a precise and sufficiently conservative prediction of the shear strength (Vn). The proposed equation conservatively accounts for the contribution of masonry and axial load (Vm+p), and horizontal reinforcement (Vs) to the shear resistance (Vn) while considering the influence of the level of ductility demand. It also considers the vertical reinforcement contribution to the in-plane shear strength.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Development of a BIM-Based Data Management System for Structural Health Monitoring with Application to Modular Buildings: Case Study.\n \n \n \n \n\n\n \n Valinejadshoubi, M.; Bagchi, A.; and Moselhi, O.\n\n\n \n\n\n\n Journal of Computing in Civil Engineering, 33(3). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"DevelopmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191106632472 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Development of a BIM-Based Data Management System for Structural Health Monitoring with Application to Modular Buildings: Case Study},\njournal = {Journal of Computing in Civil Engineering},\nauthor = {Valinejadshoubi, Mojtaba and Bagchi, Ashutosh and Moselhi, Osama},\nvolume = {33},\nnumber = {3},\nyear = {2019},\nissn = {08873801},\nabstract = {Modular buildings or off-site construction of building units are increasingly gaining momentum. Although such construction practices have advantages in terms of cost competitiveness and delivery time, they have many issues related to structural integrity and secondary stresses from vibration during transit and misalignment during installation. Therefore, monitoring the vibration, strain, and deformation of the modules using structural health monitoring (SHM) techniques is important. The primary purpose of this study is to explore building information modeling (BIM) techniques to facilitate effective data management and the representation of sensory components of the SHM system in a building and to render or visualize the damage or distress in building components based on the interpretation of sensor data. The proposed framework consists of two main modules: (1) an automated sensor-based data acquisition and storage module, which extracts sensor data for a structure from a corresponding relational database; and (2) an automated data and damage visualization module, through which sensor data are interpreted to identify damage or anomalies in the structure and the affected building components are highlighted and tagged in the BIM of the building to facilitate visualization. The damaged or near-damaged elements of the modules are highlighted in the BIM model through color-coding based on predefined threshold strain values. Because detecting buckled or yielded steel members (local damages) in a building or a module is challenging given that these components are often hidden behind fireproof coating and drywall, the proposed SHM-based condition assessment system will contribute - especially in the preinstallation and operational phases - to providing efficient, near-real-time health monitoring of buildings and increasing the efficiency of the structural condition assessment process. These benefits could be particularly useful for modular buildings, for which the modules are constructed in a plant and transported to the site for installation. In these stages, a module may undergo hidden or visible damage, the installed sensors are expected to provide a mechanism to assess such damage, and the entire process can be managed through BIM. Importantly, %note that although a similar concept was explored by other researchers to integrate SHM with BIM, the present study provides a more comprehensive methodology through the complete implementation of the system to demonstrate the concept through a case study.<br/> © 2019 American Society of Civil Engineers.},\nkey = {Structural health monitoring},\n%keywords = {Damage detection;Visualization;Data acquisition;Architectural design;Information theory;Information management;Modular construction;Data visualization;Digital storage;},\n%note = {Building Information Model - BIM;Damage visualizations;Modular buildings;Relational Database;Structural health monitoring (SHM);},\nURL = {http://dx.doi.org/10.1061/(ASCE)CP.1943-5487.0000826},\n} \n\n\n
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\n Modular buildings or off-site construction of building units are increasingly gaining momentum. Although such construction practices have advantages in terms of cost competitiveness and delivery time, they have many issues related to structural integrity and secondary stresses from vibration during transit and misalignment during installation. Therefore, monitoring the vibration, strain, and deformation of the modules using structural health monitoring (SHM) techniques is important. The primary purpose of this study is to explore building information modeling (BIM) techniques to facilitate effective data management and the representation of sensory components of the SHM system in a building and to render or visualize the damage or distress in building components based on the interpretation of sensor data. The proposed framework consists of two main modules: (1) an automated sensor-based data acquisition and storage module, which extracts sensor data for a structure from a corresponding relational database; and (2) an automated data and damage visualization module, through which sensor data are interpreted to identify damage or anomalies in the structure and the affected building components are highlighted and tagged in the BIM of the building to facilitate visualization. The damaged or near-damaged elements of the modules are highlighted in the BIM model through color-coding based on predefined threshold strain values. Because detecting buckled or yielded steel members (local damages) in a building or a module is challenging given that these components are often hidden behind fireproof coating and drywall, the proposed SHM-based condition assessment system will contribute - especially in the preinstallation and operational phases - to providing efficient, near-real-time health monitoring of buildings and increasing the efficiency of the structural condition assessment process. These benefits could be particularly useful for modular buildings, for which the modules are constructed in a plant and transported to the site for installation. In these stages, a module may undergo hidden or visible damage, the installed sensors are expected to provide a mechanism to assess such damage, and the entire process can be managed through BIM. Importantly, %note that although a similar concept was explored by other researchers to integrate SHM with BIM, the present study provides a more comprehensive methodology through the complete implementation of the system to demonstrate the concept through a case study.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Seismic fragilities of single-column highway bridges with rocking column-footing.\n \n \n \n \n\n\n \n Xie, Y.; Zhang, J.; DesRoches, R.; and Padgett, J. E.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 48(7): 843 - 864. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191706827563 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic fragilities of single-column highway bridges with rocking column-footing},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Xie, Yazhou and Zhang, Jian and DesRoches, Reginald and Padgett, Jamie E.},\nvolume = {48},\nnumber = {7},\nyear = {2019},\npages = {843 - 864},\nissn = {00988847},\nabstract = {Rocking isolation has been increasingly studied as a promising design concept to limit the earthquake damage of civil structures. Despite the difficulties and uncertainties of predicting the rocking response under individual earthquake excitations (due to negative rotational stiffness and complex impact energy loss), in a statistical sense, the seismic performance of rocking structures has been shown to be generally consistent with the experimental outcomes. To this end, this study assesses, in a probabilistic manner, the effectiveness of using rocking isolation as a retrofit strategy for single-column concrete box-girder highway bridges in California. Under earthquake excitation, the rocking bridge could experience multi-class responses (eg, full contacted or uplifting foundation) and multi-mode damage (eg, overturning, uplift impact, and column nonlinearity). A multi-step machine learning framework is developed to estimate the damage probability associated with each damage scenario. The framework consists of the dimensionally consistent generalized linear model for regression of seismic demand, the logistic regression for classification of distinct response classes, and the stepwise regression for feature selection of significant ground motion and structural parameters. Fragility curves are derived to predict the response class probabilities of rocking uplift and overturning, and the conditional damage probabilities such as column vibrational damage and rocking uplift impact damage. The fragility estimates of rocking bridges are compared with those for as-built bridges, indicating that rocking isolation is capable of reducing column damage potential. Additionally, there exists an optimal slenderness angle range that enables the studied bridges to experience much lower overturning tendencies and significantly reduced column damage probabilities at the same time.<br/> © 2019 John Wiley & Sons, Ltd.},\nkey = {Machine learning},\n%keywords = {Energy dissipation;Earthquakes;Regression analysis;Box girder bridges;Highway bridges;Steel bridges;},\n%note = {Concrete box girders;Earthquake excitation;fragility estimate;Generalized linear model;overturning;rocking;Rotational stiffness;Structural parameter;},\nURL = {http://dx.doi.org/10.1002/eqe.3164},\n} \n\n\n
\n
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\n Rocking isolation has been increasingly studied as a promising design concept to limit the earthquake damage of civil structures. Despite the difficulties and uncertainties of predicting the rocking response under individual earthquake excitations (due to negative rotational stiffness and complex impact energy loss), in a statistical sense, the seismic performance of rocking structures has been shown to be generally consistent with the experimental outcomes. To this end, this study assesses, in a probabilistic manner, the effectiveness of using rocking isolation as a retrofit strategy for single-column concrete box-girder highway bridges in California. Under earthquake excitation, the rocking bridge could experience multi-class responses (eg, full contacted or uplifting foundation) and multi-mode damage (eg, overturning, uplift impact, and column nonlinearity). A multi-step machine learning framework is developed to estimate the damage probability associated with each damage scenario. The framework consists of the dimensionally consistent generalized linear model for regression of seismic demand, the logistic regression for classification of distinct response classes, and the stepwise regression for feature selection of significant ground motion and structural parameters. Fragility curves are derived to predict the response class probabilities of rocking uplift and overturning, and the conditional damage probabilities such as column vibrational damage and rocking uplift impact damage. The fragility estimates of rocking bridges are compared with those for as-built bridges, indicating that rocking isolation is capable of reducing column damage potential. Additionally, there exists an optimal slenderness angle range that enables the studied bridges to experience much lower overturning tendencies and significantly reduced column damage probabilities at the same time.
© 2019 John Wiley & Sons, Ltd.\n
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\n \n\n \n \n \n \n \n \n Long-term performance monitoring of GFRP-reinforced concrete beams using sensor-mounted supplemental rebars under harsh environmental conditions.\n \n \n \n \n\n\n \n Rahmatian, A.; Roy, T. B.; Mofidi, A.; Bagchi, A.; and Nokken, M.\n\n\n \n\n\n\n Journal of Civil Structural Health Monitoring, 9(2): 293 - 306. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Long-termPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191606803812 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Long-term performance monitoring of GFRP-reinforced concrete beams using sensor-mounted supplemental rebars under harsh environmental conditions},\njournal = {Journal of Civil Structural Health Monitoring},\nauthor = {Rahmatian, Arash and Roy, Timir Baran and Mofidi, Amir and Bagchi, Ashutosh and Nokken, Michelle},\nvolume = {9},\nnumber = {2},\nyear = {2019},\npages = {293 - 306},\nissn = {21905452},\nabstract = {Fiber-optic sensors (FOS) are increasingly being used in reinforced-concrete (RC) structures for their accuracy and durability. One of the drawbacks of FOS is their fragility at installation. One recently developed method to address such deficiency is to install the FOS on a short bar (supplemental bar) that is rigidly connected to the structural reinforcement bars prior to concrete pouring. However, the durability of such systems under harsh environmental conditions has not been well established. In order to better understand the behavior of the aforementioned FOS systems under harsh environmental conditions, seven half-scale RC beams with glass fiber-reinforced polymer bars were exposed to four different exposure regimes, in the present study. After 14 months of exposure to harsh environmental conditions, the RC beams were subjected to static flexural testing to evaluate the FOS system behavior under each environmental condition. In addition, the strain responses of the sensors mounted on the supplemental bars and those in the main bars were monitored to validate the newly developed FOS mounting system. The results of this study show that the proposed FOS mounting system can efficiently capture the actual strain in all environmental conditions tested in this study except immersion exposure under high alkali solution. In addition, the flexural deformation and the exposure impact to the beam capacity were evaluated.<br/> © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.},\nkey = {Fiber optic sensors},\n%keywords = {Concrete beams and girders;Mountings;Fiber reinforced plastics;Durability;Reinforced concrete;},\n%note = {Concrete beam;Environmental conditions;Flexural deformations;Glass-fiber reinforced polymer bars;Immersion exposure;Long term performance;Reinforced concrete beams;Structural reinforcement;},\nURL = {http://dx.doi.org/10.1007/s13349-019-00330-1},\n} \n\n\n
\n
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\n Fiber-optic sensors (FOS) are increasingly being used in reinforced-concrete (RC) structures for their accuracy and durability. One of the drawbacks of FOS is their fragility at installation. One recently developed method to address such deficiency is to install the FOS on a short bar (supplemental bar) that is rigidly connected to the structural reinforcement bars prior to concrete pouring. However, the durability of such systems under harsh environmental conditions has not been well established. In order to better understand the behavior of the aforementioned FOS systems under harsh environmental conditions, seven half-scale RC beams with glass fiber-reinforced polymer bars were exposed to four different exposure regimes, in the present study. After 14 months of exposure to harsh environmental conditions, the RC beams were subjected to static flexural testing to evaluate the FOS system behavior under each environmental condition. In addition, the strain responses of the sensors mounted on the supplemental bars and those in the main bars were monitored to validate the newly developed FOS mounting system. The results of this study show that the proposed FOS mounting system can efficiently capture the actual strain in all environmental conditions tested in this study except immersion exposure under high alkali solution. In addition, the flexural deformation and the exposure impact to the beam capacity were evaluated.
© 2019, Springer-Verlag GmbH Germany, part of Springer Nature.\n
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\n \n\n \n \n \n \n \n \n Sensitivity of seismic demands and fragility estimates of a typical California highway bridge to uncertainties in its soil-structure interaction modeling.\n \n \n \n \n\n\n \n Xie, Y.; and DesRoches, R.\n\n\n \n\n\n\n Engineering Structures, 189: 605 - 617. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"SensitivityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191506747129 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Sensitivity of seismic demands and fragility estimates of a typical California highway bridge to uncertainties in its soil-structure interaction modeling},\njournal = {Engineering Structures},\nauthor = {Xie, Yazhou and DesRoches, Reginald},\nvolume = {189},\nyear = {2019},\npages = {605 - 617},\nissn = {01410296},\nabstract = {This study investigates the sensitivity of seismic demands and fragility estimates of a typical highway bridge in California to variation in its soil-structure interaction (SSI) modeling parameters. A rigorous p-y spring based modeling approach is developed and validated for an instrumented highway overcrossing that provides a dependable screening of each modeling parameter. Modifications are made to benchmark the overcrossing against typical bridge designs in California, including the consideration of diaphragm and seat abutments. Plausible variation in SSI modeling parameters is established using 18 random variables that cover different soil zones. Influential SSI parameters are identified for the seismic demands of bridge components through two regression techniques such as stepwise and LASSO regressions. Concurring results from both regressions indicate that bridge demand models tend to be sensitive to the modeling parameters associated with near-ground soils. Furthermore, the relative importance of the uncertainty in SSI modeling parameters is assessed with respect to the fragility estimates in both component and system levels. The study reveals that the bridge performance and fragility curves of bridge columns and decks are dominated by the uncertainty in the ground motion. However, the propagation of the potentially variable SSI parameters plays a significant role in the fragility estimates of bridge foundations and abutment components such as span unseating, bearings and shear keys. The results offer insights to guide future uncertainty treatment in SSI modeling and investment in refined soil parameter estimates through field testing or other measures.<br/> © 2019 Elsevier Ltd},\nkey = {Soils},\n%keywords = {Abutments (bridge);Seismology;Sensitivity analysis;Highway bridges;Regression analysis;Soil testing;Parameter estimation;Soil structure interactions;Uncertainty analysis;},\n%note = {Fragility curves;Lasso regressions;P-y springs;Seismic demands;Stepwise regression;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2019.03.115},\n} \n\n\n
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\n This study investigates the sensitivity of seismic demands and fragility estimates of a typical highway bridge in California to variation in its soil-structure interaction (SSI) modeling parameters. A rigorous p-y spring based modeling approach is developed and validated for an instrumented highway overcrossing that provides a dependable screening of each modeling parameter. Modifications are made to benchmark the overcrossing against typical bridge designs in California, including the consideration of diaphragm and seat abutments. Plausible variation in SSI modeling parameters is established using 18 random variables that cover different soil zones. Influential SSI parameters are identified for the seismic demands of bridge components through two regression techniques such as stepwise and LASSO regressions. Concurring results from both regressions indicate that bridge demand models tend to be sensitive to the modeling parameters associated with near-ground soils. Furthermore, the relative importance of the uncertainty in SSI modeling parameters is assessed with respect to the fragility estimates in both component and system levels. The study reveals that the bridge performance and fragility curves of bridge columns and decks are dominated by the uncertainty in the ground motion. However, the propagation of the potentially variable SSI parameters plays a significant role in the fragility estimates of bridge foundations and abutment components such as span unseating, bearings and shear keys. The results offer insights to guide future uncertainty treatment in SSI modeling and investment in refined soil parameter estimates through field testing or other measures.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Validation of the Sentinel Simplified Level 2 Product Prototype Processor (SL2P) for mapping cropland biophysical variables using Sentinel-2/MSI and Landsat-8/OLI data.\n \n \n \n \n\n\n \n Djamai, N.; Fernandes, R.; Weiss, M.; McNairn, H.; and Goita, K.\n\n\n \n\n\n\n Remote Sensing of Environment, 225: 416 - 430. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ValidationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191306715913 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Validation of the Sentinel Simplified Level 2 Product Prototype Processor (SL2P) for mapping cropland biophysical variables using Sentinel-2/MSI and Landsat-8/OLI data},\njournal = {Remote Sensing of Environment},\nauthor = {Djamai, Najib and Fernandes, Richard and Weiss, Marie and McNairn, Heather and Goita, Kalifa},\nvolume = {225},\nyear = {2019},\npages = {416 - 430},\nissn = {00344257},\nabstract = {The Simplified Level 2 Product Prototype Processor (SL2P) for estimating Leaf Area index (LAI), fraction of vegetation cover (fCover) and Canopy Water Content (CWC) from Sentinel-2/MSI and Landsat-8/OLI data was validated over an agricultural region. In-situ data collected during the SMAP Validation Experiment 2016 field campaign were used as a reference. SL2P processor performance varied substantially between crop type and biophysical variable. Over all crops, SL2P underestimated in-situ LAI and CWC measurements when using either MSI (slope (bias) of 0.70 (−0.37) for LAI and 0.42 (−0.37 kg/m<sup>2</sup>) for CWC) or OLI (slope (bias) of 0.59 (−1.21) for LAI and 0.24 (−0.23 kg/m<sup>2</sup>) for CWC) data. The accuracy of SL2P fCover estimates, over all crops, was higher (slope (bias) of 0.99 (1.84%) using MSI and 0.93 (−3.75%) using OLI). The RMSE between biophysical variables estimated using SL2P from MSI (OLI) in comparison to in-situ data was 0.98 (1.63) for LAI, 11.39% (10.95%) for fCover and 0.66 kg/m<sup>2</sup> (0.96 kg/m<sup>2</sup>) for CWC. Slightly better results are generally obtained using locally calibrated vegetation indices models, when compared to SL2P estimates using the corresponding sensor data. Uncertainty metrics of vegetation biophysical variables derived from both MSI and OLI, when compared to interpolated in-situ data time series, are found comparable to results obtained for cross-validation suggesting the possibility of using interpolated in-situ data time series for validating decametric resolution remote sensing products sparsely sampled in time.<br/> © 2019 Elsevier Inc.},\nkey = {Landsat},\n%keywords = {Biophysics;Time series;Crops;Vegetation;Remote sensing;},\n%note = {Bio-physical variables;LANDSAT;Sentinel-2/MSI;SL2P;Validation;},\nURL = {http://dx.doi.org/10.1016/j.rse.2019.03.020},\n} \n\n\n
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\n The Simplified Level 2 Product Prototype Processor (SL2P) for estimating Leaf Area index (LAI), fraction of vegetation cover (fCover) and Canopy Water Content (CWC) from Sentinel-2/MSI and Landsat-8/OLI data was validated over an agricultural region. In-situ data collected during the SMAP Validation Experiment 2016 field campaign were used as a reference. SL2P processor performance varied substantially between crop type and biophysical variable. Over all crops, SL2P underestimated in-situ LAI and CWC measurements when using either MSI (slope (bias) of 0.70 (−0.37) for LAI and 0.42 (−0.37 kg/m2) for CWC) or OLI (slope (bias) of 0.59 (−1.21) for LAI and 0.24 (−0.23 kg/m2) for CWC) data. The accuracy of SL2P fCover estimates, over all crops, was higher (slope (bias) of 0.99 (1.84%) using MSI and 0.93 (−3.75%) using OLI). The RMSE between biophysical variables estimated using SL2P from MSI (OLI) in comparison to in-situ data was 0.98 (1.63) for LAI, 11.39% (10.95%) for fCover and 0.66 kg/m2 (0.96 kg/m2) for CWC. Slightly better results are generally obtained using locally calibrated vegetation indices models, when compared to SL2P estimates using the corresponding sensor data. Uncertainty metrics of vegetation biophysical variables derived from both MSI and OLI, when compared to interpolated in-situ data time series, are found comparable to results obtained for cross-validation suggesting the possibility of using interpolated in-situ data time series for validating decametric resolution remote sensing products sparsely sampled in time.
© 2019 Elsevier Inc.\n
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\n \n\n \n \n \n \n \n \n Impulse response test for condition assessment of concrete: A review.\n \n \n \n \n\n\n \n Sajid, S.; and Chouinard, L.\n\n\n \n\n\n\n Construction and Building Materials, 211: 317 - 328. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ImpulsePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191306686352 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Impulse response test for condition assessment of concrete: A review},\njournal = {Construction and Building Materials},\nauthor = {Sajid, Sikandar and Chouinard, Luc},\nvolume = {211},\nyear = {2019},\npages = {317 - 328},\nissn = {09500618},\nabstract = {The impulse-response test is one of the most versatile nondestructive test (NDT) methods for condition assessment of concrete structures. It is an elastic stress-wave propagation based low-strain and low frequency NDT method, which is widely employed in the NDT industry. Nevertheless, it is used mainly as a relative basis test, in which contour plots of the response parameter are used to distinguish between intact and anomalous regions in the test element. This article is the first to compile current published literature on the subject. A summary of the published case studies using impulse-response test is presented, followed by the current state-of-the-art of the fundamental theoretical understanding of the method. Current knowledge gaps are identified and recommendations are proposed to address these issues. The recommendations are aimed to move the impulse-response test from a qualitative NDT method to a quantitative condition assessment tool for concrete structures.<br/> © 2019 Elsevier Ltd},\nkey = {Impulse response},\n%keywords = {Elastic waves;Nondestructive examination;Concretes;Concrete construction;Concrete testing;Wave propagation;Concrete buildings;},\n%note = {Anomalous regions;Condition assessments;Elastic stress waves;Integrity tests;Non-destructive test;Quantitative conditions;Response parameters;State of the art;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2019.03.174},\n} \n\n\n
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\n The impulse-response test is one of the most versatile nondestructive test (NDT) methods for condition assessment of concrete structures. It is an elastic stress-wave propagation based low-strain and low frequency NDT method, which is widely employed in the NDT industry. Nevertheless, it is used mainly as a relative basis test, in which contour plots of the response parameter are used to distinguish between intact and anomalous regions in the test element. This article is the first to compile current published literature on the subject. A summary of the published case studies using impulse-response test is presented, followed by the current state-of-the-art of the fundamental theoretical understanding of the method. Current knowledge gaps are identified and recommendations are proposed to address these issues. The recommendations are aimed to move the impulse-response test from a qualitative NDT method to a quantitative condition assessment tool for concrete structures.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Fiber-reinforced polymers bars for compression reinforcement: A promising alternative to steel bars.\n \n \n \n \n\n\n \n Elmessalami, N.; El Refai, A.; and Abed, F.\n\n\n \n\n\n\n Construction and Building Materials, 209: 725 - 737. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Fiber-reinforcedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191206657276 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Fiber-reinforced polymers bars for compression reinforcement: A promising alternative to steel bars},\njournal = {Construction and Building Materials},\nauthor = {Elmessalami, Nouran and El Refai, Ahmed and Abed, Farid},\nvolume = {209},\nyear = {2019},\npages = {725 - 737},\nissn = {09500618},\nabstract = {Fiber-reinforced polymers (FRP) have been introduced as alternative reinforcement for concrete members since decades. Nevertheless, current design codes prohibit the use of FRP bars as main reinforcement in compression members such as columns. Recently, several studies came into sight focusing on evaluating the compressive response of FRP-reinforced concrete (RC) columns. While many of these studies have praised the performance of FRP bars in RC columns, others conservatively neglected their contribution to the columns’ capacities. The objective of this study is to present a comprehensive literature review on FRP-reinforced columns in order to better understand their performance under various loading conditions. To do so, the authors collected and analyzed the results of more than 300 tests published in 43 different experimental and analytical studies in the scientific literature. The collected columns were classified according to their slenderness, loading regime, cross sections, concrete type, and reinforcement. The design equations proposed by several authors to predict the load-carrying capacities of the tested columns were collected and assessed. The work presents a critical review of the existing research on FRP-reinforced columns, identifies gaps in knowledge, and outlines directions for future research. The analysis of the collected data and the accuracy of several design approaches in predicting the behavior of FRP-reinforced columns suggests that it is time for code authorities to recognize the use of FRP in compression members.<br/> © 2019 Elsevier Ltd},\nkey = {Reinforced concrete},\n%keywords = {Steel fibers;Loads (forces);Load limits;Columns (structural);Buckling;Fiber reinforced plastics;},\n%note = {Compression reinforcement;Compressive response;Design approaches;Fiber reinforced polymers;Literature reviews;Reinforced columns;Reinforced concrete column;Scientific literature;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2019.03.105},\n} \n\n\n
\n
\n\n\n
\n Fiber-reinforced polymers (FRP) have been introduced as alternative reinforcement for concrete members since decades. Nevertheless, current design codes prohibit the use of FRP bars as main reinforcement in compression members such as columns. Recently, several studies came into sight focusing on evaluating the compressive response of FRP-reinforced concrete (RC) columns. While many of these studies have praised the performance of FRP bars in RC columns, others conservatively neglected their contribution to the columns’ capacities. The objective of this study is to present a comprehensive literature review on FRP-reinforced columns in order to better understand their performance under various loading conditions. To do so, the authors collected and analyzed the results of more than 300 tests published in 43 different experimental and analytical studies in the scientific literature. The collected columns were classified according to their slenderness, loading regime, cross sections, concrete type, and reinforcement. The design equations proposed by several authors to predict the load-carrying capacities of the tested columns were collected and assessed. The work presents a critical review of the existing research on FRP-reinforced columns, identifies gaps in knowledge, and outlines directions for future research. The analysis of the collected data and the accuracy of several design approaches in predicting the behavior of FRP-reinforced columns suggests that it is time for code authorities to recognize the use of FRP in compression members.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Experimental validation of the Direct Strength Method for shear spans with high aspect ratios.\n \n \n \n \n\n\n \n Pham, S. H.; Pham, C. H.; Rogers, C. A.; and Hancock, G. J.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 157: 143 - 150. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191006599743 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental validation of the Direct Strength Method for shear spans with high aspect ratios},\njournal = {Journal of Constructional Steel Research},\nauthor = {Pham, Song Hong and Pham, Cao Hung and Rogers, Colin A. and Hancock, Gregory J.},\nvolume = {157},\nyear = {2019},\npages = {143 - 150},\nissn = {0143974X},\nabstract = {Shear behaviour of cold-formed steel beams with an aspect ratio (shear-span/web-depth) of 1.0 has been studied thoroughly, mainly using central point load tests. However, for beams with higher aspect ratios, the effect of bending causes a reduction of shear capacity and alters the failure modes. This paper introduces a new test setup, the dual actuator test rig, which is equipped with two actuators moving independently at customizable displacement rates to control and minimize applied bending moments in the shear spans of interest. Shear strength close to pure shear capacity can be therefore reached even at an aspect ratio of 2.0. Experimental series recently performed at the University of Sydney on channel section members using the new test configuration is presented. The experimental results together with other available experimental data are combined and used to validate and re-calibrate the Direct Strength Method design formulae incorporated in the AISI S100:2016 Specification and the AS/NZS 4600:2018 Standard.<br/> © 2019 Elsevier Ltd},\nkey = {Aspect ratio},\n%keywords = {Shear flow;Load testing;Shear strength;Actuators;},\n%note = {Applied bending moments;Cold-formed steel beams;Cold-formed steel structures;Direct strength methods;Experimental validations;Shear tests;Test configurations;University of Sydney;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2019.02.018},\n} \n\n\n
\n
\n\n\n
\n Shear behaviour of cold-formed steel beams with an aspect ratio (shear-span/web-depth) of 1.0 has been studied thoroughly, mainly using central point load tests. However, for beams with higher aspect ratios, the effect of bending causes a reduction of shear capacity and alters the failure modes. This paper introduces a new test setup, the dual actuator test rig, which is equipped with two actuators moving independently at customizable displacement rates to control and minimize applied bending moments in the shear spans of interest. Shear strength close to pure shear capacity can be therefore reached even at an aspect ratio of 2.0. Experimental series recently performed at the University of Sydney on channel section members using the new test configuration is presented. The experimental results together with other available experimental data are combined and used to validate and re-calibrate the Direct Strength Method design formulae incorporated in the AISI S100:2016 Specification and the AS/NZS 4600:2018 Standard.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Robustness of the P-RAT in the Shear-Wave Velocity Measurement of Soft clays.\n \n \n \n \n\n\n \n Elbeggo, D.; Hussien, M. N.; Ethier, Y.; and Karray, M.\n\n\n \n\n\n\n Journal of Geotechnical and Geoenvironmental Engineering, 145(5). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"RobustnessPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20190906561119 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Robustness of the P-RAT in the Shear-Wave Velocity Measurement of Soft clays},\njournal = {Journal of Geotechnical and Geoenvironmental Engineering},\nauthor = {Elbeggo, Dania and Hussien, Mahmoud N. and Ethier, Yannic and Karray, Mourad},\nvolume = {145},\nnumber = {5},\nyear = {2019},\nissn = {10900241},\nabstract = {Shear-wave velocity, V.S., is a mechanical geotechnical parameter required for the dynamic response of geomaterials. This property can be advantageously assessed both in the field and in the laboratory. Although field tests may offer the most precise methods to obtain V.S. Of a certain soil, they, however, do not permit conditions different from those encountered in the field to be readily investigated. Several laboratory techniques of V.S. measurement have been developed, most notably the resonant column and the piezoelectric bender elements. Although the latter is widely used, it leads to a number of difficulties that cannot be denied, such as uncertainties in first arrivals detection, near-field effects, and mixed radiation of primary and shear waves. In an ongoing effort to minimize/eliminate these difficulties, the geotechnical group at the Université De Sherbrooke (UdeS) developed the piezoelectric ring-actuator technique (P-RAT), which can be easily incorporated into traditional geotechnical apparatus, an advantage that facilitates its utilization in other geotechnical laboratories as a powerful tool in V.S. measurement. This paper summarizes the results of parallel tests of P-RAT installed in typical oedometer cells to measure the V.S. Of soft sensitive clay samples extracted from two different sites in Québec, canada. These tests were carried out at two different institutes, the UdeS and the École De technologie supérieure (ÉTS). The main purpose was to examine the reliability of the P-RAT test results by applying the same test procedures to similar test materials. The results show that the change in the used sensors, input signals, data acquisition system, and technical operators between the two laboratories has no practical effect on the measured V.S. Values of all tested samples, which confirms the robustness of the technique and promotes its incorporation in other geotechnical apparatus and laboratories. Results obtained at both institutions were also used to present consolidation curves of the tested soft clays in terms of their shear-wave velocities and establish unique correlations between the stress-normalized shear-wave velocities, V.S.1, with the overconsolidation (OcR) and void (e) ratios for each site investigated.<br/> © 2019 American Society of civil Engineers.},\nkey = {Laboratories},\n%keywords = {Shear waves;Transmission control protocol;Piezoelectricity;Soil testing;Wave propagation;Acoustic wave velocity;Rats;Data acquisition;Radiation effects;Soil mechanics;Shear flow;},\n%note = {Data acquisition system;Geotechnical parameters;Laboratory techniques;Overconsolidation;Piezoelectric rings;Sensitive clays;Shear wave velocity;Shear-wave velocity measurement;},\nURL = {http://dx.doi.org/10.1061/(AScE)GT.1943-5606.0002017},\n} \n\n\n
\n
\n\n\n
\n Shear-wave velocity, V.S., is a mechanical geotechnical parameter required for the dynamic response of geomaterials. This property can be advantageously assessed both in the field and in the laboratory. Although field tests may offer the most precise methods to obtain V.S. Of a certain soil, they, however, do not permit conditions different from those encountered in the field to be readily investigated. Several laboratory techniques of V.S. measurement have been developed, most notably the resonant column and the piezoelectric bender elements. Although the latter is widely used, it leads to a number of difficulties that cannot be denied, such as uncertainties in first arrivals detection, near-field effects, and mixed radiation of primary and shear waves. In an ongoing effort to minimize/eliminate these difficulties, the geotechnical group at the Université De Sherbrooke (UdeS) developed the piezoelectric ring-actuator technique (P-RAT), which can be easily incorporated into traditional geotechnical apparatus, an advantage that facilitates its utilization in other geotechnical laboratories as a powerful tool in V.S. measurement. This paper summarizes the results of parallel tests of P-RAT installed in typical oedometer cells to measure the V.S. Of soft sensitive clay samples extracted from two different sites in Québec, canada. These tests were carried out at two different institutes, the UdeS and the École De technologie supérieure (ÉTS). The main purpose was to examine the reliability of the P-RAT test results by applying the same test procedures to similar test materials. The results show that the change in the used sensors, input signals, data acquisition system, and technical operators between the two laboratories has no practical effect on the measured V.S. Values of all tested samples, which confirms the robustness of the technique and promotes its incorporation in other geotechnical apparatus and laboratories. Results obtained at both institutions were also used to present consolidation curves of the tested soft clays in terms of their shear-wave velocities and establish unique correlations between the stress-normalized shear-wave velocities, V.S.1, with the overconsolidation (OcR) and void (e) ratios for each site investigated.
© 2019 American Society of civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Streamlined life cycle assessment of an innovative bio-based material in construction: A case study of a phase change material panel.\n \n \n \n \n\n\n \n Heidari, M. D.; Mathis, D.; Blanchet, P.; and Amor, B.\n\n\n \n\n\n\n Forests, 10(2). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"StreamlinedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20190806521628 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Streamlined life cycle assessment of an innovative bio-based material in construction: A case study of a phase change material panel},\njournal = {Forests},\nauthor = {Heidari, Mohammad Davoud and Mathis, Damien and Blanchet, Pierre and Amor, Ben},\nvolume = {10},\nnumber = {2},\nyear = {2019},\nissn = {19994907},\nabstract = {Research Highlights: This is the first study that analyzes the environmental performance of wood-based phase change material (PCM) panels. Background and Objectives: Life cycle assessment (LCA) is a powerful environmental management tool. However, a full LCA, especially during the early design phase of a product, is far too time and data intensive for industrial companies to conduct during their production and consumption processes. Therefore, there is an increasing demand for simpler methods to demonstrate a company's resource efficiency potential without being data or time intensive. The goal of this study is to investigate the suitability of streamlined LCA (SLCA) tools and methods used in the building material industry, and to assess their robustness in the case study of a wood-based PCM panel. Materials and Methods: The Bilan Produit tool was selected as the SLCA tool and a matrix LCA was selected as the most commonly used SLCA method. A specific case study of a wood-based PCM panel was selected with a focus on its application in building construction in the province of Québec. Results: As a semi-quantitative LCA method, the matrix LCA provided a quick screening of the product life cycle and its hotspot stages, i.e., life cycle stages with high impact. However, the results of the full LCA and SLCA tools were quantitative and based on scientific databases. The use of the PCM panel and heating energy had the highest environmental impacts as compared to other inputs. The results of the full LCA and SLCA also identified energy consumption as a hotspot. Insufficient material or processes in the SLCA databases was one of the reasons for the difference between the results of the SLCA and full LCA. Conclusions: The examined SLCA methods provided proper explanations for the bio-based material in construction, but several limitations still exist, and the methods should be improved to make them more robust when implemented in such a specific sector.<br/> © 2019 by the authors.},\nkey = {Life cycle},\n%keywords = {Environmental impact;Phase change materials;Matrix algebra;Product design;Energy utilization;Environmental management;},\n%note = {Bio-based materials;Environmental management tool;Environmental performance;Industrial companies;Life Cycle Assessment (LCA);Production and consumption;Resource efficiencies;Simplified LCA;},\nURL = {http://dx.doi.org/10.3390/f10020160},\n} \n\n\n
\n
\n\n\n
\n Research Highlights: This is the first study that analyzes the environmental performance of wood-based phase change material (PCM) panels. Background and Objectives: Life cycle assessment (LCA) is a powerful environmental management tool. However, a full LCA, especially during the early design phase of a product, is far too time and data intensive for industrial companies to conduct during their production and consumption processes. Therefore, there is an increasing demand for simpler methods to demonstrate a company's resource efficiency potential without being data or time intensive. The goal of this study is to investigate the suitability of streamlined LCA (SLCA) tools and methods used in the building material industry, and to assess their robustness in the case study of a wood-based PCM panel. Materials and Methods: The Bilan Produit tool was selected as the SLCA tool and a matrix LCA was selected as the most commonly used SLCA method. A specific case study of a wood-based PCM panel was selected with a focus on its application in building construction in the province of Québec. Results: As a semi-quantitative LCA method, the matrix LCA provided a quick screening of the product life cycle and its hotspot stages, i.e., life cycle stages with high impact. However, the results of the full LCA and SLCA tools were quantitative and based on scientific databases. The use of the PCM panel and heating energy had the highest environmental impacts as compared to other inputs. The results of the full LCA and SLCA also identified energy consumption as a hotspot. Insufficient material or processes in the SLCA databases was one of the reasons for the difference between the results of the SLCA and full LCA. Conclusions: The examined SLCA methods provided proper explanations for the bio-based material in construction, but several limitations still exist, and the methods should be improved to make them more robust when implemented in such a specific sector.
© 2019 by the authors.\n
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\n \n\n \n \n \n \n \n \n Full-scale testing of stiffened extended shear tab connections under combined axial and shear forces.\n \n \n \n \n\n\n \n Motallebi, M.; Lignos, D. G.; and Rogers, C. A.\n\n\n \n\n\n\n Engineering Structures, 185: 90 - 105. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Full-scalePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20190606464234 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Full-scale testing of stiffened extended shear tab connections under combined axial and shear forces},\njournal = {Engineering Structures},\nauthor = {Motallebi, Mohammad and Lignos, Dimitrios G. and Rogers, Colin A.},\nvolume = {185},\nyear = {2019},\npages = {90 - 105},\nissn = {01410296},\nabstract = {Owing to the lack of a comprehensive published procedure for the design of stiffened extended shear tabs, practicing engineers usually follow design guides for unstiffened shear tabs. The results of recent laboratory experiments and numerical analyses have demonstrated that improvements to this approach are warranted. Furthermore, design methods for this connection type under combined axial and shear forces are not well established. To address these shortcomings, full-scale laboratory tests were carried out on the double-sided configuration of stiffened extended beam-to-girder shear tab connections with full depth shear plates. These experiments were complemented by a continuum finite element (CFE) study, with which the axial force demands along with other critical parameters that affect the connection behaviour were further examined. The experiments supported by the CFE findings indicated that the primary connection damage states are mainly associated with yielding and fracture of the shear plate due to the interaction of flexural, shear, and axial force. The study demonstrated that the direction and magnitude of the applied axial force significantly affected the shear and axial demands along the centerline of the interior bolt line. The current design practice for the double-sided configuration of the full-depth extended beam-to-girder shear tab was also evaluated; a significant underestimation was observed in the prediction of a connection's ultimate resistance.<br/> © 2019 Elsevier Ltd},\nkey = {Shear flow},\n%keywords = {Fracture;Axial flow;},\n%note = {Double sided;Extended shear tab;Gross section;Net section;Plate-out;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2019.01.125},\n} \n\n\n
\n
\n\n\n
\n Owing to the lack of a comprehensive published procedure for the design of stiffened extended shear tabs, practicing engineers usually follow design guides for unstiffened shear tabs. The results of recent laboratory experiments and numerical analyses have demonstrated that improvements to this approach are warranted. Furthermore, design methods for this connection type under combined axial and shear forces are not well established. To address these shortcomings, full-scale laboratory tests were carried out on the double-sided configuration of stiffened extended beam-to-girder shear tab connections with full depth shear plates. These experiments were complemented by a continuum finite element (CFE) study, with which the axial force demands along with other critical parameters that affect the connection behaviour were further examined. The experiments supported by the CFE findings indicated that the primary connection damage states are mainly associated with yielding and fracture of the shear plate due to the interaction of flexural, shear, and axial force. The study demonstrated that the direction and magnitude of the applied axial force significantly affected the shear and axial demands along the centerline of the interior bolt line. The current design practice for the double-sided configuration of the full-depth extended beam-to-girder shear tab was also evaluated; a significant underestimation was observed in the prediction of a connection's ultimate resistance.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Recommendations for Improved Welding Procedures for Thick Steel Plates Through Thermo-Mechanical Analysis.\n \n \n \n \n\n\n \n Ibrahim, O. A.; Lignos, D. G.; and Rogers, C. A.\n\n\n \n\n\n\n International Journal of Steel Structures, 19(1): 193 - 212. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"RecommendationsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20190506451084 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Recommendations for Improved Welding Procedures for Thick Steel Plates Through Thermo-Mechanical Analysis},\njournal = {International Journal of Steel Structures},\nauthor = {Ibrahim, Omar A. and Lignos, Dimitrios G. and Rogers, Colin A.},\nvolume = {19},\nnumber = {1},\nyear = {2019},\npages = {193 - 212},\nissn = {15982351},\nabstract = {Welding of steel plates is accompanied by residual stresses that increase as the constraint provided by the welded components becomes greater. Consequently, crack initiation has been reported after welding thick plates due to the high residual stresses developed by the welding procedure. This is further exacerbated by the higher likelihood of imperfections present in thick steel plates due to the rolling and cooling process. The research described herein aims to develop improved submerged arc welding (SAW) procedures to reduce the residual stresses for steel plates of thickness > 50 mm. Acceptance criteria are developed for discontinuities present in the steel plates prior to welding, to limit the probability of crack initiation. A parametric study of SAW procedure parameters was conducted utilizing a validated finite element model. Two welding procedures were recommended for thick steel plates. Discontinuity acceptance limits were also recommended for each welding procedure using a fracture toughness database and an expression developed to calculate the probability of a crack to initiate.<br/> © 2018, Korean Society of Steel Construction.},\nkey = {Submerged arc welding},\n%keywords = {Fracture toughness;Crack initiation;Residual stresses;},\n%note = {Acceptance criteria;Acceptance limits;Parametric study;Thermo-mechanical analysis;Thick steel plates;Welded components;Welding procedures;Welding simulation;},\nURL = {http://dx.doi.org/10.1007/s13296-018-0110-2},\n} \n\n\n
\n
\n\n\n
\n Welding of steel plates is accompanied by residual stresses that increase as the constraint provided by the welded components becomes greater. Consequently, crack initiation has been reported after welding thick plates due to the high residual stresses developed by the welding procedure. This is further exacerbated by the higher likelihood of imperfections present in thick steel plates due to the rolling and cooling process. The research described herein aims to develop improved submerged arc welding (SAW) procedures to reduce the residual stresses for steel plates of thickness > 50 mm. Acceptance criteria are developed for discontinuities present in the steel plates prior to welding, to limit the probability of crack initiation. A parametric study of SAW procedure parameters was conducted utilizing a validated finite element model. Two welding procedures were recommended for thick steel plates. Discontinuity acceptance limits were also recommended for each welding procedure using a fracture toughness database and an expression developed to calculate the probability of a crack to initiate.
© 2018, Korean Society of Steel Construction.\n
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\n \n\n \n \n \n \n \n \n Stress-strain model for C-shape confined concrete masonry boundary elements of RM shear walls.\n \n \n \n \n\n\n \n Obaidat, A. T.; Ashour, A.; and Galal, K.\n\n\n \n\n\n\n Engineering Structures, 183: 1059 - 1071. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Stress-strainPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20190506452659 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Stress-strain model for C-shape confined concrete masonry boundary elements of RM shear walls},\njournal = {Engineering Structures},\nauthor = {Obaidat, Ala' T. and Ashour, Ahmed and Galal, Khaled},\nvolume = {183},\nyear = {2019},\npages = {1059 - 1071},\nissn = {01410296},\nabstract = {Reinforced masonry (RM) shear walls with boundary elements have been recently presented as a more ductile alternative to RM rectangular shear walls. Evaluating the complete (i.e. including the post-peak branch) compression stress-strain behavior of the confined and unconfined masonry is essential for predicting the seismic response of the RM walls with boundary elements. Recently, the authors investigated the effect of various volumetric ratios of transverse reinforcement, vertical reinforcement ratios, and grout strength on the axial stress-strain behavior of reinforced masonry boundary elements (RMBEs). However, all the specimens had a specific height to thickness ratio (i.e., AR = 5). This study presents the observed stress-strain relationship of seventeen half-scale fully grouted unreinforced and RMBE specimens, built using C-shape blocks, tested under concentric compression loading up to failure. Thus, quantifying the effect of various aspect (height to thickness) and confinement ratios on the RMBEs peak stress, strain corresponding to peak, and post-peak behavior. The results indicate that, as the hoop spacings and/or aspect ratio decreases, the peak stress and post-peak strains increase. Moreover, this study presents a stress-strain empirical model capable of predicting the RMBE stress-strain response by computing the confined and unconfined masonry stress-strain behavior. The model is calibrated using the experimental data of thirty-three RMBE specimens, tested in this study and literature. The proposed model presents an efficient tool that can be implemented in different analytical/numerical packages.<br/> © 2019 Elsevier Ltd},\nkey = {Aspect ratio},\n%keywords = {Mortar;Shear walls;Stress-strain curves;Grouting;Strain;Concrete construction;Reinforcement;},\n%note = {Boundary elements;C shape;Reinforced masonry;Stress strain;Stress-strain behaviors;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2019.01.016},\n} \n\n\n
\n
\n\n\n
\n Reinforced masonry (RM) shear walls with boundary elements have been recently presented as a more ductile alternative to RM rectangular shear walls. Evaluating the complete (i.e. including the post-peak branch) compression stress-strain behavior of the confined and unconfined masonry is essential for predicting the seismic response of the RM walls with boundary elements. Recently, the authors investigated the effect of various volumetric ratios of transverse reinforcement, vertical reinforcement ratios, and grout strength on the axial stress-strain behavior of reinforced masonry boundary elements (RMBEs). However, all the specimens had a specific height to thickness ratio (i.e., AR = 5). This study presents the observed stress-strain relationship of seventeen half-scale fully grouted unreinforced and RMBE specimens, built using C-shape blocks, tested under concentric compression loading up to failure. Thus, quantifying the effect of various aspect (height to thickness) and confinement ratios on the RMBEs peak stress, strain corresponding to peak, and post-peak behavior. The results indicate that, as the hoop spacings and/or aspect ratio decreases, the peak stress and post-peak strains increase. Moreover, this study presents a stress-strain empirical model capable of predicting the RMBE stress-strain response by computing the confined and unconfined masonry stress-strain behavior. The model is calibrated using the experimental data of thirty-three RMBE specimens, tested in this study and literature. The proposed model presents an efficient tool that can be implemented in different analytical/numerical packages.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Wind effects on air curtain performance at building entrances.\n \n \n \n \n\n\n \n Yang, S.; Alrawashdeh, H.; Zhang, C.; Qi, D.; Wang, L. (.; and Stathopoulos, T.\n\n\n \n\n\n\n Building and Environment, 151: 75 - 87. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"WindPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20190506439720 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind effects on air curtain performance at building entrances},\njournal = {Building and Environment},\nauthor = {Yang, Senwen and Alrawashdeh, Hatem and Zhang, Cheng and Qi, Dahai and Wang, Liangzhu (Leon) and Stathopoulos, Ted},\nvolume = {151},\nyear = {2019},\npages = {75 - 87},\nissn = {03601323},\nabstract = {Air curtains have been widely used as a mean of reducing infiltration and associated energy losses through building entrances. Since quantifying the infiltration rate through the entrances is directly related to air curtain energy performance, previous studies investigated the infiltration through air curtain doors accounting for door operation, usage frequency, air supply angle and velocity etc. Limited studies have focused on the effect of the wind on air curtain performance, although wind is quite common and could interact with air curtain directly. The purpose of this study is to evaluate experimentally the performance of air curtain under different wind speeds and directions, and their interactions with air curtain jet considering different supply speeds, angles, and pressure differences across the air curtain. The experiments were mostly conducted in an atmospheric boundary layer wind tunnel in a sub-scale building model to represent the actual large-scale air curtain performance in terms of the function of dimensionless air infiltration rate versus the dimensionless pressure difference across the air curtain. The study found that air curtains could resist a certain level of wind speed but could be penetrated by high wind mostly at the lower section of the door, which may be avoided by selecting suitable air curtain speeds and angles, increase of indoor pressures, and entrance door types; the wind effect is the strongest for wind blowing straight-onto the air curtain and decreases with the inclined angles before arriving at the minimal effect at a certain angle, as defined by new wind pressure coefficients.<br/> © 2019 Elsevier Ltd},\nkey = {Wind tunnels},\n%keywords = {Air;Doors;Velocity measurement;Air curtains;Atmospheric boundary layer;Wind effects;Energy dissipation;Structural dynamics;},\n%note = {Air infiltration;Effect of the wind;Energy performance;Infiltration rate;Minimal effects;Particle image velocimetries;Pressure differences;Wind pressure coefficient;},\nURL = {http://dx.doi.org/10.1016/j.buildenv.2019.01.032},\n} \n\n\n
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\n Air curtains have been widely used as a mean of reducing infiltration and associated energy losses through building entrances. Since quantifying the infiltration rate through the entrances is directly related to air curtain energy performance, previous studies investigated the infiltration through air curtain doors accounting for door operation, usage frequency, air supply angle and velocity etc. Limited studies have focused on the effect of the wind on air curtain performance, although wind is quite common and could interact with air curtain directly. The purpose of this study is to evaluate experimentally the performance of air curtain under different wind speeds and directions, and their interactions with air curtain jet considering different supply speeds, angles, and pressure differences across the air curtain. The experiments were mostly conducted in an atmospheric boundary layer wind tunnel in a sub-scale building model to represent the actual large-scale air curtain performance in terms of the function of dimensionless air infiltration rate versus the dimensionless pressure difference across the air curtain. The study found that air curtains could resist a certain level of wind speed but could be penetrated by high wind mostly at the lower section of the door, which may be avoided by selecting suitable air curtain speeds and angles, increase of indoor pressures, and entrance door types; the wind effect is the strongest for wind blowing straight-onto the air curtain and decreases with the inclined angles before arriving at the minimal effect at a certain angle, as defined by new wind pressure coefficients.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Modular tied eccentrically braced frames for improved seismic response of tall buildings.\n \n \n \n \n\n\n \n Chen, L.; Tremblay, R.; and Tirca, L.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 155: 370 - 384. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ModularPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20190406412032 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modular tied eccentrically braced frames for improved seismic response of tall buildings},\njournal = {Journal of Constructional Steel Research},\nauthor = {Chen, L. and Tremblay, R. and Tirca, L.},\nvolume = {155},\nyear = {2019},\npages = {370 - 384},\nissn = {0143974X},\nabstract = {Two alternative braced frame configurations are examined to improve the vertical distribution of seismic storey drifts and inelastic demands in multi-storey steel eccentrically braced frames (EBFs): the tied braced frame (TBF) system and a modular tied-braced frame (M-TBF) system. In TBFs, the concentration of inelastic deformation is prevented by connecting all ductile links over the frame height with vertical tie members. In the M-TBF configuration, the ties are interrupted at one or more locations along the frame height to reduce member forces while achieving the same objective as the TBF. The performance of each bracing system is investigated through nonlinear response history analysis for 8-, 16-, and 24-storey prototype building structures. For the 16-storey building, two M-TBF configurations are examined, two 8-storey modules and four 4-storey modules, to investigate the influence of this parameter. The analysis results show that the TBFs exhibited smaller and more uniform storey drifts and residual drifts at the expense of high axial force demands in the tie members. Soft-storey response could also be mitigated with M-TBFs, but member forces diminished significantly when adopting a modular tied braced frame configuration, which led to a reduction in the required steel tonnage with limited increases in peak and residual drift demands. Performance assessment using incremental dynamic analysis showed that the 16-storey EBF could not pass the FEMA P695 collapse safety criteria whereas all tied braced frames could exhibit satisfactory performance.<br/> © 2019 Elsevier Ltd},\nkey = {Tall buildings},\n%keywords = {Structural frames;Seismic response;},\n%note = {Braced frame;Eccentrically braced frames;Modular;Residual drifts;Storey drift;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2019.01.005},\n} \n\n\n
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\n Two alternative braced frame configurations are examined to improve the vertical distribution of seismic storey drifts and inelastic demands in multi-storey steel eccentrically braced frames (EBFs): the tied braced frame (TBF) system and a modular tied-braced frame (M-TBF) system. In TBFs, the concentration of inelastic deformation is prevented by connecting all ductile links over the frame height with vertical tie members. In the M-TBF configuration, the ties are interrupted at one or more locations along the frame height to reduce member forces while achieving the same objective as the TBF. The performance of each bracing system is investigated through nonlinear response history analysis for 8-, 16-, and 24-storey prototype building structures. For the 16-storey building, two M-TBF configurations are examined, two 8-storey modules and four 4-storey modules, to investigate the influence of this parameter. The analysis results show that the TBFs exhibited smaller and more uniform storey drifts and residual drifts at the expense of high axial force demands in the tie members. Soft-storey response could also be mitigated with M-TBFs, but member forces diminished significantly when adopting a modular tied braced frame configuration, which led to a reduction in the required steel tonnage with limited increases in peak and residual drift demands. Performance assessment using incremental dynamic analysis showed that the 16-storey EBF could not pass the FEMA P695 collapse safety criteria whereas all tied braced frames could exhibit satisfactory performance.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Sensitivity analysis and optimum design of a hydronic snow melting system during snowfall.\n \n \n \n \n\n\n \n Liu, H.; Maghoul, P.; and Hollander, H. M.\n\n\n \n\n\n\n Physics and Chemistry of the Earth, 113: 31 - 42. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"SensitivityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20190406411281 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Sensitivity analysis and optimum design of a hydronic snow melting system during snowfall},\njournal = {Physics and Chemistry of the Earth},\nauthor = {Liu, Hongwei and Maghoul, Pooneh and Hollander, Hartmut M.},\nvolume = {113},\nyear = {2019},\npages = {31 - 42},\nissn = {14747065},\nabstract = {<div data-language="eng" data-ev-field="abstract">Snow and ice accumulation induces hazardous driving conditions due to the effect of reduced friction on the road surface. A traditional chemical-based snow melting approach is not environmentally friendly and effective when the temperature is below −3.9<sup>∘</sup> C. Thermal snow melting techniques, such as hydronic heating system, can be an alternative to chemical-based methods. In this paper, a new approach is proposed for sizing the hydronic snow melting system. For this purpose, a transient heat transfer mechanism is considered. A complete energy balance equation including solar radiation, snowfall, and convective heat flux is used at a bridge surface. The Nelder-Mead algorithm is used to minimize the energy consumption used for snow melting by determining an optimum relation between the inlet temperature and flow rate. Since the performance of such systems depends significantly on the weather design, sensitivity analyses were performed to analyze the sensitivity of the optimum design to variations in air temperature, snowfall rate, wind speed and insulating methods. The results showed that the insulating methods and snowfall rate are the most dominant factors influencing the energy consumption of the hydronic heating system. The energy consumption rate is expected to increase by 29% without insulating the bottom and sides of a bridge deck. A 30% increase in snowfall rate leads to a rise in energy consumption by 35%. On the other hand, heat loss due to the variation in air temperature, wind speed, and solar radiation is not significant.<br/></div> © 2019 Elsevier Ltd},\nkey = {Snow},\n%keywords = {Atmospheric temperature;Heating equipment;Sensitivity analysis;Heating;Insulation;Melting;Heat flux;Energy utilization;Wind;},\n%note = {Driving conditions;Energy balance equations;Energy consumption rates;Inlet temperature;Nelder-Mead algorithms;Optimum designs;Snow-melting;Transient heat transfer;},\nURL = {http://dx.doi.org/10.1016/j.pce.2019.01.009},\n} \n\n\n
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Snow and ice accumulation induces hazardous driving conditions due to the effect of reduced friction on the road surface. A traditional chemical-based snow melting approach is not environmentally friendly and effective when the temperature is below −3.9 C. Thermal snow melting techniques, such as hydronic heating system, can be an alternative to chemical-based methods. In this paper, a new approach is proposed for sizing the hydronic snow melting system. For this purpose, a transient heat transfer mechanism is considered. A complete energy balance equation including solar radiation, snowfall, and convective heat flux is used at a bridge surface. The Nelder-Mead algorithm is used to minimize the energy consumption used for snow melting by determining an optimum relation between the inlet temperature and flow rate. Since the performance of such systems depends significantly on the weather design, sensitivity analyses were performed to analyze the sensitivity of the optimum design to variations in air temperature, snowfall rate, wind speed and insulating methods. The results showed that the insulating methods and snowfall rate are the most dominant factors influencing the energy consumption of the hydronic heating system. The energy consumption rate is expected to increase by 29% without insulating the bottom and sides of a bridge deck. A 30% increase in snowfall rate leads to a rise in energy consumption by 35%. On the other hand, heat loss due to the variation in air temperature, wind speed, and solar radiation is not significant.
© 2019 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Performance analysis of a proposed geothermal pile system for heating and cooling energy demand for a building in cold regions.\n \n \n \n \n\n\n \n Saaly, M.; Maghoul, P.; Kavgic, M.; and Polyzois, D.\n\n\n \n\n\n\n Sustainable Cities and Society, 45: 669 - 682. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"PerformancePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20190106335114 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance analysis of a proposed geothermal pile system for heating and cooling energy demand for a building in cold regions},\njournal = {Sustainable Cities and Society},\nauthor = {Saaly, Maryam and Maghoul, Pooneh and Kavgic, Miroslava and Polyzois, Dimos},\nvolume = {45},\nyear = {2019},\npages = {669 - 682},\nissn = {22106707},\nabstract = {In this paper, the performance of a proposed geothermal energy pile system for the energy demand of an institutional building is investigated. The building studied in this research is situated in the Fort-Garry campus of the University of Manitoba in the southernmost portion of Winnipeg (MB) in Canada. In an urban area, underground temperatures are substantially higher than the surrounding rural areas due to the buildings heat leakage to their underneath ground. In this study, this heat loss is harvested through geothermal piles and rejected to the building for the HVAC system utilization. The underground thermal imbalance, which is the most common problem encountered while utilizing the geothermal energy in cold regions, is extensively studied. It is concluded that despite the heat leakage through the basement enclosure, thermal balance of the soil, in case of supporting the total energy demand of the building by geothermal piles, cannot be met. The application of some auxiliary heat sources is proposed. Finally, the amount of energy harvested from the ground is calculated by maintaining the thermal balance of the soil and preventing the freezing at the soil-pile interface which affects adversely the structural performance of geothermal piles.<br/> © 2018 Elsevier Ltd},\nkey = {Piles},\n%keywords = {Buildings;Energy management;Geothermal energy;Heat losses;Structural analysis;Soils;Climate control;},\n%note = {Heating and cooling;HVAC system;Institutional building;Performance analysis;Soil-pile interface;Structural performance;Thermal imbalance;Underground temperature;},\nURL = {http://dx.doi.org/10.1016/j.scs.2018.12.014},\n} \n\n\n
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\n In this paper, the performance of a proposed geothermal energy pile system for the energy demand of an institutional building is investigated. The building studied in this research is situated in the Fort-Garry campus of the University of Manitoba in the southernmost portion of Winnipeg (MB) in Canada. In an urban area, underground temperatures are substantially higher than the surrounding rural areas due to the buildings heat leakage to their underneath ground. In this study, this heat loss is harvested through geothermal piles and rejected to the building for the HVAC system utilization. The underground thermal imbalance, which is the most common problem encountered while utilizing the geothermal energy in cold regions, is extensively studied. It is concluded that despite the heat leakage through the basement enclosure, thermal balance of the soil, in case of supporting the total energy demand of the building by geothermal piles, cannot be met. The application of some auxiliary heat sources is proposed. Finally, the amount of energy harvested from the ground is calculated by maintaining the thermal balance of the soil and preventing the freezing at the soil-pile interface which affects adversely the structural performance of geothermal piles.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Flexural behavior of basalt fiber-reinforced concrete slab strips reinforced with BFRP and GFRP bars.\n \n \n \n \n\n\n \n Attia, K.; Alnahhal, W.; Elrefai, A.; and Rihan, Y.\n\n\n \n\n\n\n Composite Structures, 211: 1 - 12. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"FlexuralPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20185106268848 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Flexural behavior of basalt fiber-reinforced concrete slab strips reinforced with BFRP and GFRP bars},\njournal = {Composite Structures},\nauthor = {Attia, Karim and Alnahhal, Wael and Elrefai, Ahmed and Rihan, Yousef},\nvolume = {211},\nyear = {2019},\npages = {1 - 12},\nissn = {02638223},\nabstract = {This research investigates experimentally and analytically a novel one-way slab system reinforced with either basalt fiber-reinforced polymer (BFRP) or glass fiber-reinforced polymer (GFRP) longitudinal bars embedded in fiber-reinforced concrete (FRC) incorporating basalt macro-fibers (BMF). Twelve one-way concrete slab strips were prepared and tested to failure under four-point loading configuration. The investigated parameters included the type of fiber-reinforced polymer bars (BFRP and GFRP), the longitudinal reinforcement ratio ρ<inf>f</inf> (1.4 and 2.8ρ<inf>bf</inf>, where ρ<inf>bf</inf> is the balanced reinforcement ratio), and the volume fraction of the fibers added (0, 0.5, 1, and 2% per volume). The test results demonstrated the promise of BMF to enhance the flexural performance of the tested slab strips in terms of ductility and load-carrying capacities. The formulations of different available codes and design guidelines were used to predict the test results. Comparison between the experimental and predicted results showed the adequacy of the models to predict the flexural performance of the tested slab strips. The findings of this study demonstrated the potential of using the BMF as alternatives to conventional fibers in flexural concrete members.<br/> © 2018 Elsevier Ltd},\nkey = {Basalt},\n%keywords = {Ductility;Fiber reinforced plastics;Fibers;Concrete slabs;Glass;Reinforced concrete;},\n%note = {Basalt fiber reinforced concretes;Fiber reinforced polymer bars;Fiber reinforced polymers;FRP bar;Glass fiber reinforced polymer;Longitudinal reinforcement;Macro fibers;One-way concrete slabs;},\nURL = {http://dx.doi.org/10.1016/j.compstruct.2018.12.016},\n} \n\n\n
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\n This research investigates experimentally and analytically a novel one-way slab system reinforced with either basalt fiber-reinforced polymer (BFRP) or glass fiber-reinforced polymer (GFRP) longitudinal bars embedded in fiber-reinforced concrete (FRC) incorporating basalt macro-fibers (BMF). Twelve one-way concrete slab strips were prepared and tested to failure under four-point loading configuration. The investigated parameters included the type of fiber-reinforced polymer bars (BFRP and GFRP), the longitudinal reinforcement ratio ρf (1.4 and 2.8ρbf, where ρbf is the balanced reinforcement ratio), and the volume fraction of the fibers added (0, 0.5, 1, and 2% per volume). The test results demonstrated the promise of BMF to enhance the flexural performance of the tested slab strips in terms of ductility and load-carrying capacities. The formulations of different available codes and design guidelines were used to predict the test results. Comparison between the experimental and predicted results showed the adequacy of the models to predict the flexural performance of the tested slab strips. The findings of this study demonstrated the potential of using the BMF as alternatives to conventional fibers in flexural concrete members.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n On bond-slip response and development length of steel bars in pre-cracked concrete.\n \n \n \n \n\n\n \n Mousavi, S. S.; Guizani, L.; and Ouellet-Plamondon, C. M.\n\n\n \n\n\n\n Construction and Building Materials, 199: 560 - 573. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"OnPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20185106270940 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {On bond-slip response and development length of steel bars in pre-cracked concrete},\njournal = {Construction and Building Materials},\nauthor = {Mousavi, Seyed Sina and Guizani, Lotfi and Ouellet-Plamondon, Claudiane M.},\nvolume = {199},\nyear = {2019},\npages = {560 - 573},\nissn = {09500618},\nabstract = {Previous research on steel bar-concrete bond behaviour has been concentrated mostly on the intact concrete without considering initial cracks induced by transverse tensile loading called pre-cracking phenomenon. There is no accurate model for evaluating bond behaviour and development length of steel bar in pre-cracked concrete. This paper aims to characterise the bond-slip behaviour of steel bars in pre-cracked concrete by direct pull-out tests, and proposes a constitutive law as a function of the crack width. Results show that induced cracks, notably cracks wider than 0.15 mm, cause a significant reduction in maximum and residual bond strength. Also, results indicate that larger crack widths result in considerably lower dissipated energy by the bond mechanism. The results obtained from both the experimental tests and referenced database demonstrate that the pre-cracking phenomenon has a higher impact on the residual bond strength compared to the maximum bond strength. Unlike existing equations, the proposed model accurately considers cracking effects on the steel bar-concrete bond properties and shows a satisfactory fit with the experimental database. A predictive equation is also proposed for calculation of the development length in pre-cracked concrete, which is more conservative and prudent compared to existing regulations in design codes.<br/> © 2018 Elsevier Ltd},\nkey = {Energy dissipation},\n%keywords = {Bond strength (materials);Bond length;Laws and legislation;Bars (metal);Concretes;},\n%note = {Bond models;Cracked concretes;Development length;Dissipated energy;Experimental database;Predictive equations;Slip;Transverse tensile;},\nURL = {http://dx.doi.org/10.1016/j.conbuildmat.2018.12.039},\n} \n\n\n
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\n Previous research on steel bar-concrete bond behaviour has been concentrated mostly on the intact concrete without considering initial cracks induced by transverse tensile loading called pre-cracking phenomenon. There is no accurate model for evaluating bond behaviour and development length of steel bar in pre-cracked concrete. This paper aims to characterise the bond-slip behaviour of steel bars in pre-cracked concrete by direct pull-out tests, and proposes a constitutive law as a function of the crack width. Results show that induced cracks, notably cracks wider than 0.15 mm, cause a significant reduction in maximum and residual bond strength. Also, results indicate that larger crack widths result in considerably lower dissipated energy by the bond mechanism. The results obtained from both the experimental tests and referenced database demonstrate that the pre-cracking phenomenon has a higher impact on the residual bond strength compared to the maximum bond strength. Unlike existing equations, the proposed model accurately considers cracking effects on the steel bar-concrete bond properties and shows a satisfactory fit with the experimental database. A predictive equation is also proposed for calculation of the development length in pre-cracked concrete, which is more conservative and prudent compared to existing regulations in design codes.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Is the environmental opportunity of retrofitting the residential sector worth the life cycle cost? A consequential assessment of a typical house in Quebec.\n \n \n \n \n\n\n \n Pedinotti-Castelle, M.; Astudillo, M. F.; Pineau, P.; and Amor, B.\n\n\n \n\n\n\n Renewable and Sustainable Energy Reviews, 101: 428 - 439. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"IsPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20184906206887 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Is the environmental opportunity of retrofitting the residential sector worth the life cycle cost? A consequential assessment of a typical house in Quebec},\njournal = {Renewable and Sustainable Energy Reviews},\nauthor = {Pedinotti-Castelle, Marianne and Astudillo, Miguel F. and Pineau, Pierre-Olivier and Amor, Ben},\nvolume = {101},\nyear = {2019},\npages = {428 - 439},\nissn = {13640321},\nabstract = {<div data-language="eng" data-ev-field="abstract">The residential sector has a major role to play in the transition to green energy. The heating and cooling of buildings represents 40% of global energy consumption, while vast energy savings potential remains largely unexploited. Given the low turnover of housing stock and ambitious emission reduction targets, most of this potential will require retrofitting existing buildings. In this study, we investigate how to best take advantage of retrofits in the residential sector of Quebec (Canada) using environmental and economic criteria. Within the province, heating is mainly powered by electricity from renewable sources. We propose an approach based on a consequential life cycle assessment that focuses on marginal impacts combined with "consequential life cycle costing." Seven alternatives using different heating systems and building envelopes are compared to a reference case, which consists of a typical detached house heated with electric baseboards. This approach permits an assessment of cost-efficiency and sustainable technological solutions. Our results show that the amount of energy saved by retrofits (especially for air source heat pumps with and without building envelop improvements) generates environmental and economic benefits. Furthermore, if the saved electricity is exported to replace natural gas, then the local electricity savings is quite beneficial. These results provide key new insights on the energy policies affecting the building sector, especially for regions in cold climates such as Quebec.<br/></div> © 2018 Elsevier Ltd},\nkey = {Retrofitting},\n%keywords = {Air source heat pumps;Costs;Emission control;Energy policy;Energy utilization;Heating;Heating equipment;Housing;Life cycle;},\n%note = {Consequential life cycle costing;Consequential life-cycle assessment;Energy transitions;Global energy;Green energy;Heating and cooling of buildings;Heating system;Life cycle costing;Residential sectors;Retrofit;},\nURL = {http://dx.doi.org/10.1016/j.rser.2018.11.021},\n} \n\n\n
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The residential sector has a major role to play in the transition to green energy. The heating and cooling of buildings represents 40% of global energy consumption, while vast energy savings potential remains largely unexploited. Given the low turnover of housing stock and ambitious emission reduction targets, most of this potential will require retrofitting existing buildings. In this study, we investigate how to best take advantage of retrofits in the residential sector of Quebec (Canada) using environmental and economic criteria. Within the province, heating is mainly powered by electricity from renewable sources. We propose an approach based on a consequential life cycle assessment that focuses on marginal impacts combined with \"consequential life cycle costing.\" Seven alternatives using different heating systems and building envelopes are compared to a reference case, which consists of a typical detached house heated with electric baseboards. This approach permits an assessment of cost-efficiency and sustainable technological solutions. Our results show that the amount of energy saved by retrofits (especially for air source heat pumps with and without building envelop improvements) generates environmental and economic benefits. Furthermore, if the saved electricity is exported to replace natural gas, then the local electricity savings is quite beneficial. These results provide key new insights on the energy policies affecting the building sector, especially for regions in cold climates such as Quebec.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Probabilistic models of abutment backfills for regional seismic assessment of highway bridges in California.\n \n \n \n \n\n\n \n Xie, Y.; Zheng, Q.; Yang, C. W.; Zhang, W.; DesRoches, R.; Padgett, J. E.; and Taciroglu, E.\n\n\n \n\n\n\n Engineering Structures, 180: 452 - 467. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ProbabilisticPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20184806160775 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Probabilistic models of abutment backfills for regional seismic assessment of highway bridges in California},\njournal = {Engineering Structures},\nauthor = {Xie, Yazhou and Zheng, Qiu and Yang, Chuang-Sheng Walter and Zhang, Wenyang and DesRoches, Reginald and Padgett, Jamie E. and Taciroglu, Ertugrul},\nvolume = {180},\nyear = {2019},\npages = {452 - 467},\nissn = {01410296},\nabstract = {Seismic responses of ordinary highway bridges that feature stiff superstructures have been shown to be strongly affected by abutment-backfill interactions. Seismic risk assessment of these bridges at the regional scale faces the added challenge of having to deal with the large uncertainty in backfill properties. In this regard, the study develops probabilistic backfill models to better quantify the uncertainties in modeling the abutment. First, efforts to establish the validity of the numerical method in predicting the pushover response of backfills are described. Advanced plasticity materials are used in finite element models (FEMs) to simulate sandy and clayey soils that yield consistent backfill force-displacement relationships against full-scale test results. Second, a probabilistic analysis framework is constructed to incorporate soil uncertainties that are identified from field investigations. Statistical moments are extracted from the resultant pushover curves to fully define the probabilistic backfill models, which are verified to bear appropriate uncertainty treatment and reasonable height adjustment factors. Further, statistical analysis tools are used to investigate the influences of different backfill models on the bridge demand estimates of two common bridge classes. The study reveals that backfill models will affect the response estimates of different bridge components in both diaphragm and seat-type abutment bridges. However, probabilistic models shall be especially considered on backfills for the bridge components that are expected to have dominant responses in the longitudinal direction. The proposed backfill models appear to outperform previous deterministic models in predicting realistic bridge responses. The models can be employed in the task of regional seismic assessment of various bridge classes.<br/> © 2018 Elsevier Ltd},\nkey = {Abutments (bridge)},\n%keywords = {Seismology;Numerical methods;Risk assessment;Uncertainty analysis;Highway bridges;Soils;Soil testing;},\n%note = {Abutment backfill;California;Clayey soils;Hyperbolic curves;Probabilistic modeling;PSDMs, ANOVA, ANCOVA;Seismic demands;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2018.11.058},\n} \n\n\n
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\n Seismic responses of ordinary highway bridges that feature stiff superstructures have been shown to be strongly affected by abutment-backfill interactions. Seismic risk assessment of these bridges at the regional scale faces the added challenge of having to deal with the large uncertainty in backfill properties. In this regard, the study develops probabilistic backfill models to better quantify the uncertainties in modeling the abutment. First, efforts to establish the validity of the numerical method in predicting the pushover response of backfills are described. Advanced plasticity materials are used in finite element models (FEMs) to simulate sandy and clayey soils that yield consistent backfill force-displacement relationships against full-scale test results. Second, a probabilistic analysis framework is constructed to incorporate soil uncertainties that are identified from field investigations. Statistical moments are extracted from the resultant pushover curves to fully define the probabilistic backfill models, which are verified to bear appropriate uncertainty treatment and reasonable height adjustment factors. Further, statistical analysis tools are used to investigate the influences of different backfill models on the bridge demand estimates of two common bridge classes. The study reveals that backfill models will affect the response estimates of different bridge components in both diaphragm and seat-type abutment bridges. However, probabilistic models shall be especially considered on backfills for the bridge components that are expected to have dominant responses in the longitudinal direction. The proposed backfill models appear to outperform previous deterministic models in predicting realistic bridge responses. The models can be employed in the task of regional seismic assessment of various bridge classes.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Improved Canadian seismic provisions for steel braced frames in heavy industrial structures.\n \n \n \n \n\n\n \n Brunet, F.; Tremblay, R.; Richard, J.; and Lasby, M.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 153: 638 - 653. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ImprovedPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20184706131164 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Improved Canadian seismic provisions for steel braced frames in heavy industrial structures},\njournal = {Journal of Constructional Steel Research},\nauthor = {Brunet, Frederic and Tremblay, Robert and Richard, Julien and Lasby, Mark},\nvolume = {153},\nyear = {2019},\npages = {638 - 653},\nissn = {0143974X},\nabstract = {The seismic provisions of the Canadian CSA S16-14 standard for steel structures for heavy industrial steel structures are reviewed and applied for a 65.4 m tall concentrically braced frames (CBFs) for an industrial application in Vancouver, BC. Two approaches are examined: a capacity design method in accordance with CSA S16 Annex M and a simpler, non-capacity design approach for the structures of the Conventional Construction (Type CC) category. Nonlinear response history analyses are performed to examine and compare the seismic response of the structures. Modifications are proposed to mobilize higher brace inelastic response, mitigate storey drift concentrations, and ensure that the columns can safely resist the seismic induced axial and flexural demands. The modified provisions are validated for additional structures having heights varying from 43 to 80 m and two different vertical distribution of the seismic weights. The robustness of the structures against excessive storey drifts and column buckling limit states is verified through incremental dynamic analysis. Both Annex M and Type CC design approaches, as modified in this study, represent two practical options to achieve cost-effective designs resulting in satisfactory seismic response. Three-dimensional nonlinear response history analysis is used to compare the 100%–100% and 100%–30% combination rules to predict the axial load demand on columns part of two orthogonal CBFs. For the structure studied, the results showed that the latter would give more realistic force estimates.<br/> © 2018 Elsevier Ltd},\nkey = {Seismic response},\n%keywords = {Steel structures;Buckling;Cost effectiveness;Structural frames;Seismic design;},\n%note = {Bi-directional;Braced frame;Column buckling;Industrial steel;Structural irregularity;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2018.11.008},\n} \n\n\n
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\n The seismic provisions of the Canadian CSA S16-14 standard for steel structures for heavy industrial steel structures are reviewed and applied for a 65.4 m tall concentrically braced frames (CBFs) for an industrial application in Vancouver, BC. Two approaches are examined: a capacity design method in accordance with CSA S16 Annex M and a simpler, non-capacity design approach for the structures of the Conventional Construction (Type CC) category. Nonlinear response history analyses are performed to examine and compare the seismic response of the structures. Modifications are proposed to mobilize higher brace inelastic response, mitigate storey drift concentrations, and ensure that the columns can safely resist the seismic induced axial and flexural demands. The modified provisions are validated for additional structures having heights varying from 43 to 80 m and two different vertical distribution of the seismic weights. The robustness of the structures against excessive storey drifts and column buckling limit states is verified through incremental dynamic analysis. Both Annex M and Type CC design approaches, as modified in this study, represent two practical options to achieve cost-effective designs resulting in satisfactory seismic response. Three-dimensional nonlinear response history analysis is used to compare the 100%–100% and 100%–30% combination rules to predict the axial load demand on columns part of two orthogonal CBFs. For the structure studied, the results showed that the latter would give more realistic force estimates.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Shear strengthening of concrete members with unbonded transverse reinforcement.\n \n \n \n \n\n\n \n Fiset, M.; Bastien, J.; and Mitchell, D.\n\n\n \n\n\n\n Engineering Structures, 180: 40 - 49. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ShearPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20184706112223 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shear strengthening of concrete members with unbonded transverse reinforcement},\njournal = {Engineering Structures},\nauthor = {Fiset, Mathieu and Bastien, Josee and Mitchell, Denis},\nvolume = {180},\nyear = {2019},\npages = {40 - 49},\nissn = {01410296},\nabstract = {This paper examines the behaviour of thick concrete members strengthened in shear with unbonded transverse reinforcement. The retrofitting technique consists of placing unbonded vertical bars with steel end plates or torque controlled expansion end anchorages in pre-drilled holes of existing thick members. To study the behaviour of these members, loading tests as well as numerical analyses were carried out. Shear capacities were compared to the predictions using the shear design approach in the Canadian Highway Bridge Design Code. The design equations which are intended for traditional stirrups reinforcement overestimates the shear capacities of the members strengthened with unbonded transverse reinforcement. However, numerical analyses provided very accurate predictions of the shear capacities. A finite element parametric study examines the effects of the shear span-to-depth ratio, vertical prestressing, shear reinforcement ratio and the stiffness of the vertical reinforcement. The stiffness of the shear strengthening system and the effects of prestressing significantly affect the shear capacity. The shear capacities were predicted well when a minimum amount of vertical prestressing was provided.<br/> © 2018 Elsevier Ltd},\nkey = {Reinforced concrete},\n%keywords = {Finite element method;Shear flow;Prestressing;Shear strength;Stiffness;Strengthening (metal);Highway planning;Highway bridges;},\n%note = {Canadian highway bridge design codes;Shear behaviour;Shear reinforcement;Shear span-to-depth ratios;Shear strengthening;Torque-controlled expansion;Transverse reinforcement;Vertical reinforcement;},\nURL = {http://dx.doi.org/10.1016/j.engstruct.2018.11.008},\n} \n\n\n
\n
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\n This paper examines the behaviour of thick concrete members strengthened in shear with unbonded transverse reinforcement. The retrofitting technique consists of placing unbonded vertical bars with steel end plates or torque controlled expansion end anchorages in pre-drilled holes of existing thick members. To study the behaviour of these members, loading tests as well as numerical analyses were carried out. Shear capacities were compared to the predictions using the shear design approach in the Canadian Highway Bridge Design Code. The design equations which are intended for traditional stirrups reinforcement overestimates the shear capacities of the members strengthened with unbonded transverse reinforcement. However, numerical analyses provided very accurate predictions of the shear capacities. A finite element parametric study examines the effects of the shear span-to-depth ratio, vertical prestressing, shear reinforcement ratio and the stiffness of the vertical reinforcement. The stiffness of the shear strengthening system and the effects of prestressing significantly affect the shear capacity. The shear capacities were predicted well when a minimum amount of vertical prestressing was provided.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Practical seismic design procedure for steel braced frames with segmental elastic spines.\n \n \n \n \n\n\n \n Chen, L.; Tremblay, R.; and Tirca, L.\n\n\n \n\n\n\n Journal of Constructional Steel Research, 153: 395 - 415. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"PracticalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20184506038975 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Practical seismic design procedure for steel braced frames with segmental elastic spines},\njournal = {Journal of Constructional Steel Research},\nauthor = {Chen, L. and Tremblay, R. and Tirca, L.},\nvolume = {153},\nyear = {2019},\npages = {395 - 415},\nissn = {0143974X},\nabstract = {A practical seismic design method is proposed for tall steel braced frames with segmental elastic trussed spines (SESBFs) used to achieve a uniform storey drift response. The method combines the forces arising from yielding of ductile elements along the braced frame height with the forces resulting from higher modes involving flexural dynamic response of the elastic truss segments. The first set of forces is obtained from static analysis whereas response spectrum analysis is used for the second one. The method is applied and validated for 8-storey and 16-storey SESBFs derived from conventional EBFs. The SESBF configurations including one, two, and four elastic truss segments were examined. The studied structures were located in Vancouver, B.C., and their behaviour was examined through nonlinear time history analysis. The proposed design method provides excellent predictions of the peak force demand imposed on the truss members. The elastic flexural response of truss segments is not bounded by yielding of the frame ductile elements and was found to be sensitive to ground motion signatures and damping assumptions. For taller frames with long truss segments, complete yielding of an individual segment as assumed in design was not observed in the analyses and the proposed method predicted conservative member forces.<br/> © 2018 Elsevier Ltd},\nkey = {Seismic design},\n%keywords = {Spectrum analysis;Structural frames;Trusses;Seismology;},\n%note = {Braced frame;Elastic truss;Flexural response;Higher mode;Nonlinear time history analysis;Response spectrum analysis;Seismic design method;Steel braced frames;},\nURL = {http://dx.doi.org/10.1016/j.jcsr.2018.10.010},\n} \n\n\n
\n
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\n A practical seismic design method is proposed for tall steel braced frames with segmental elastic trussed spines (SESBFs) used to achieve a uniform storey drift response. The method combines the forces arising from yielding of ductile elements along the braced frame height with the forces resulting from higher modes involving flexural dynamic response of the elastic truss segments. The first set of forces is obtained from static analysis whereas response spectrum analysis is used for the second one. The method is applied and validated for 8-storey and 16-storey SESBFs derived from conventional EBFs. The SESBF configurations including one, two, and four elastic truss segments were examined. The studied structures were located in Vancouver, B.C., and their behaviour was examined through nonlinear time history analysis. The proposed design method provides excellent predictions of the peak force demand imposed on the truss members. The elastic flexural response of truss segments is not bounded by yielding of the frame ductile elements and was found to be sensitive to ground motion signatures and damping assumptions. For taller frames with long truss segments, complete yielding of an individual segment as assumed in design was not observed in the analyses and the proposed method predicted conservative member forces.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Optimum insulation design for buried utilities subject to frost action in cold regions using the Nelder-Mead algorithm.\n \n \n \n \n\n\n \n Liu, H.; Maghoul, P.; and Shalaby, A.\n\n\n \n\n\n\n International Journal of Heat and Mass Transfer, 130: 613 - 639. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"OptimumPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20184406027425 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Optimum insulation design for buried utilities subject to frost action in cold regions using the Nelder-Mead algorithm},\njournal = {International Journal of Heat and Mass Transfer},\nauthor = {Liu, Hongwei and Maghoul, Pooneh and Shalaby, Ahmed},\nvolume = {130},\nyear = {2019},\npages = {613 - 639},\nissn = {00179310},\nabstract = {Frost action in soils can cause detrimental damage to buried utilities, such as water and gas pipes. One of the promising approaches to protect buried utilities against frost damage and reduce the excavation cost is to install thermal insulation over and around the pipe. This paper considers two different conductive heat transfer models, with and without the effect of soil pore-water phase change, as well as a heat and mass transfer model for freezing soils to investigate the effectiveness of insulation systems for frost protection of buried pipes. It was found that the latent heat released during the phase change significantly affects the heat transfer process and that the impact of phase change on insulation design should not be overlooked. Furthermore, by comparing numerical results to field measurement data, it is found that the mass transfer has an insignificant effect on the temperature and unfrozen water content distribution in the frost-susceptible foundation soil. A parametric study was carried out to assess the effects of different factors such as the backfill materials, geometry, total length, thickness of insulation, distance between pipe and insulation as well as the burial depth of pipe on the thermal performance of insulation. Finally, the Nelder-Mead algorithm was implemented to determine the optimum insulation design so that the overall cost is minimized while the pipe is protected from freezing.<br/> © 2018 Elsevier Ltd},\nkey = {Mass transfer},\n%keywords = {Soils;Thermal insulation;Freezing;},\n%note = {Buried utilities;Frost action;Heat and mass transfer;Optimization algorithms;Parametric study;Phase Change;},\nURL = {http://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.10.107},\n} \n\n\n
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\n\n\n
\n Frost action in soils can cause detrimental damage to buried utilities, such as water and gas pipes. One of the promising approaches to protect buried utilities against frost damage and reduce the excavation cost is to install thermal insulation over and around the pipe. This paper considers two different conductive heat transfer models, with and without the effect of soil pore-water phase change, as well as a heat and mass transfer model for freezing soils to investigate the effectiveness of insulation systems for frost protection of buried pipes. It was found that the latent heat released during the phase change significantly affects the heat transfer process and that the impact of phase change on insulation design should not be overlooked. Furthermore, by comparing numerical results to field measurement data, it is found that the mass transfer has an insignificant effect on the temperature and unfrozen water content distribution in the frost-susceptible foundation soil. A parametric study was carried out to assess the effects of different factors such as the backfill materials, geometry, total length, thickness of insulation, distance between pipe and insulation as well as the burial depth of pipe on the thermal performance of insulation. Finally, the Nelder-Mead algorithm was implemented to determine the optimum insulation design so that the overall cost is minimized while the pipe is protected from freezing.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Feasibility study of snow melting system for bridge decks using geothermal energy piles integrated with heat pump in Canada.\n \n \n \n \n\n\n \n Liu, H.; Maghoul, P.; Bahari, A.; and Kavgic, M.\n\n\n \n\n\n\n Renewable Energy,1266 - 1280. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"FeasibilityPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20184105928229 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Feasibility study of snow melting system for bridge decks using geothermal energy piles integrated with heat pump in Canada},\njournal = {Renewable Energy},\nauthor = {Liu, Hongwei and Maghoul, Pooneh and Bahari, Ako and Kavgic, Miroslava},\nyear = {2019},\npages = {1266 - 1280},\nissn = {09601481},\nabstract = {Snow melting systems using geothermal energy piles are a clean technology to overcome the problems of traditional chemical-based snow melting methods. This paper aims to study the feasibility of such systems in six major cities (Calgary, Edmonton, Montreal, Ottawa, Toronto and Winnipeg) in Canada. The amount of energy, as well as the inlet temperature of a hydronic system required to warm up and keep the surface temperature of a bridge slab unit above 0 °C during a typical snowfall were determined based on a transient energy balance at the slab surface and weather conditions for each city. The coefficient of performance (COP) of the heat pump for a bridge was then derived for each city based on its specific local geological conditions and heating demands. Also, the problems related to the ground thermal imbalance due to the operation of such systems were addressed. Finally, the economic feasibility study was performed to compare costs between a snow melting system for a bridge deck using geothermal energy piles and an electricity-based heating system. It was concluded that the snow melting system using geothermal energy piles is efficient and cost effective. However, the extent of efficiency and saving varies with implementation areas.<br/> © 2018 Elsevier Ltd},\nkey = {Cost effectiveness},\n%keywords = {Cost benefit analysis;Pumps;Melting;Geothermal heat pumps;Piles;Bridge decks;Economic analysis;Geothermal energy;Snow;Planning;},\n%note = {Coefficient of performances (COP);Cost analysis;Economic feasibilities;Feasibility studies;Geological conditions;Heat pumps;Snow-melting;Surface temperatures;},\nURL = {http://dx.doi.org/10.1016/j.renene.2018.09.109},\n} \n\n\n
\n
\n\n\n
\n Snow melting systems using geothermal energy piles are a clean technology to overcome the problems of traditional chemical-based snow melting methods. This paper aims to study the feasibility of such systems in six major cities (Calgary, Edmonton, Montreal, Ottawa, Toronto and Winnipeg) in Canada. The amount of energy, as well as the inlet temperature of a hydronic system required to warm up and keep the surface temperature of a bridge slab unit above 0 °C during a typical snowfall were determined based on a transient energy balance at the slab surface and weather conditions for each city. The coefficient of performance (COP) of the heat pump for a bridge was then derived for each city based on its specific local geological conditions and heating demands. Also, the problems related to the ground thermal imbalance due to the operation of such systems were addressed. Finally, the economic feasibility study was performed to compare costs between a snow melting system for a bridge deck using geothermal energy piles and an electricity-based heating system. It was concluded that the snow melting system using geothermal energy piles is efficient and cost effective. However, the extent of efficiency and saving varies with implementation areas.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Three-dimensional free vibration analysis of triclinic piezoelectric hollow cylinder.\n \n \n \n \n\n\n \n Rabbani, V.; Bahari, A.; Hodaei, M.; Maghoul, P.; and Wu, N.\n\n\n \n\n\n\n Composites Part B: Engineering, 158: 352 - 363. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Three-dimensionalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20184105914630 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Three-dimensional free vibration analysis of triclinic piezoelectric hollow cylinder},\njournal = {Composites Part B: Engineering},\nauthor = {Rabbani, V. and Bahari, A. and Hodaei, M. and Maghoul, P. and Wu, N.},\nvolume = {158},\nyear = {2019},\npages = {352 - 363},\nissn = {13598368},\nabstract = {Triclinic materials are categorized as anisotropic elastic materials with no existence of a symmetry plane. To characterize such materials, 21 elastic constants are required. The previous studies have not investigated triclinic materials due to a high number of material constants considered in the modelling. This paper presents a closed-form 3D piezoelectric model to investigate the free vibration of an arbitrary thick triclinic piezoelectric hollow cylinder. The piezoelectric cylinder is assumed to be infinitely long and short circuit boundary conditions are applied at the inner and outer surfaces of the shell. The natural frequencies of the cylinder are calculated using the transfer matrix approach along with the state space method. The effects of different anisotropic piezoelectric properties including orthotropic, monoclinic, and triclinic materials on the dispersion curve of natural frequencies are studied. The numerical results show that if the value of the axial wave number, the circumferential wave number, or natural frequency increase the resonant frequency of triclinic material deviates from other anisotropic materials such as orthotropic. Finally the validity of the proposed model is confirmed by comparing with simplified cases studied in the literature.<br/> © 2018 Elsevier Ltd},\nkey = {Natural frequencies},\n%keywords = {3D modeling;Piezoelectric devices;Transfer matrix method;Vibration analysis;Anisotropy;Crystallography;Cylinders (shapes);Piezoelectricity;State space methods;},\n%note = {Frequency reponse;Fully anisotropic;Linear piezoelectricity;Monoclinic;Triclinic;},\nURL = {http://dx.doi.org/10.1016/j.compositesb.2018.09.033},\n} \n\n\n
\n
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\n Triclinic materials are categorized as anisotropic elastic materials with no existence of a symmetry plane. To characterize such materials, 21 elastic constants are required. The previous studies have not investigated triclinic materials due to a high number of material constants considered in the modelling. This paper presents a closed-form 3D piezoelectric model to investigate the free vibration of an arbitrary thick triclinic piezoelectric hollow cylinder. The piezoelectric cylinder is assumed to be infinitely long and short circuit boundary conditions are applied at the inner and outer surfaces of the shell. The natural frequencies of the cylinder are calculated using the transfer matrix approach along with the state space method. The effects of different anisotropic piezoelectric properties including orthotropic, monoclinic, and triclinic materials on the dispersion curve of natural frequencies are studied. The numerical results show that if the value of the axial wave number, the circumferential wave number, or natural frequency increase the resonant frequency of triclinic material deviates from other anisotropic materials such as orthotropic. Finally the validity of the proposed model is confirmed by comparing with simplified cases studied in the literature.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Numerical Simulation of Stefan Problem Coupled with Mass Transport in a Binary System Through XFEM/Level Set Method.\n \n \n \n \n\n\n \n Li, M.; Chaouki, H.; Robert, J.; Ziegler, D.; and Fafard, M.\n\n\n \n\n\n\n Journal of Scientific Computing, 78(1): 145 - 166. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20182605360682 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical Simulation of Stefan Problem Coupled with Mass Transport in a Binary System Through XFEM/Level Set Method},\njournal = {Journal of Scientific Computing},\nauthor = {Li, Min and Chaouki, Hicham and Robert, Jean-Loup and Ziegler, Donald and Fafard, Mario},\nvolume = {78},\nnumber = {1},\nyear = {2019},\npages = {145 - 166},\nissn = {08857474},\nabstract = {This paper deals with the application of the extended finite element method to simulate the phase change phenomenon in a binary system while considering the interaction with the mass transport of chemical species. To this end, the thermal conduction equation with the Stefan condition and the mass diffusion equation are solved to depict the temperature and solute concentration distributions, respectively. In dealing with the heat transfer problem with phase change, the temperature field is weakly enriched using the corrected abs-enrichment scheme to avoid the blending element problem. The melting temperature imposed by the penalty method at the solid–liquid interface is solute concentration dependent. On the other hand in dealing with the mass transport problem, due to the strong discontinuity in the concentration field at the interface, the sign-enrichment scheme is used. A constant separating out concentration is enforced on the solid side of the interface also by the penalty method, while a mass flux is naturally applied on the liquid side. The phase interface is captured implicitly by the level set method, which is applied on the same fixed finite element mesh. The robustness and the accuracy of the model are demonstrated through numerical case studies.<br/> © 2018, Springer Science+Business Media, LLC, part of Springer Nature.},\nkey = {Numerical methods},\n%keywords = {Constrained optimization;Heat transfer;Blending;Phase interfaces;Finite element method;Hydrogels;Drop breakup;Level measurement;Systems (metallurgical);},\n%note = {Extended finite element method;Finite element meshes;Heat transfer problems;Level Set method;Mass diffusion equation;Phase change phenomena;Stefan problem;Thermal conduction equation;},\nURL = {http://dx.doi.org/10.1007/s10915-018-0759-x},\n} \n\n\n
\n
\n\n\n
\n This paper deals with the application of the extended finite element method to simulate the phase change phenomenon in a binary system while considering the interaction with the mass transport of chemical species. To this end, the thermal conduction equation with the Stefan condition and the mass diffusion equation are solved to depict the temperature and solute concentration distributions, respectively. In dealing with the heat transfer problem with phase change, the temperature field is weakly enriched using the corrected abs-enrichment scheme to avoid the blending element problem. The melting temperature imposed by the penalty method at the solid–liquid interface is solute concentration dependent. On the other hand in dealing with the mass transport problem, due to the strong discontinuity in the concentration field at the interface, the sign-enrichment scheme is used. A constant separating out concentration is enforced on the solid side of the interface also by the penalty method, while a mass flux is naturally applied on the liquid side. The phase interface is captured implicitly by the level set method, which is applied on the same fixed finite element mesh. The robustness and the accuracy of the model are demonstrated through numerical case studies.
© 2018, Springer Science+Business Media, LLC, part of Springer Nature.\n
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\n \n\n \n \n \n \n \n \n Airflow and heat stress in a metallurgical industrial building under different working conditions.\n \n \n \n \n\n\n \n Zhao, R.; Gosselin, L.; Tessier, J.; and Fafard, M.\n\n\n \n\n\n\n International Journal of Ventilation, 18(3): 167 - 186. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"AirflowPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20180704802049 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Airflow and heat stress in a metallurgical industrial building under different working conditions},\njournal = {International Journal of Ventilation},\nauthor = {Zhao, Ruijie and Gosselin, Louis and Tessier, Jayson and Fafard, Mario},\nvolume = {18},\nnumber = {3},\nyear = {2019},\npages = {167 - 186},\nissn = {14733315},\nabstract = {Potrooms are elongated buildings in which hundreds of aluminum smelting pots are housed, and have the particularity, among others, to be naturally ventilated. A CFD model simulating a potroom is developed to study its thermal comfort when the aluminum smelting pots take in less volume of air so as to facilitate waste heat recovery from the pot draft. The influences of wind and buoyancy on the ventilation performance of the potroom are simultaneously considered. The heat stress during hot weather is estimated for different cases. A 50% reduction in the pot draft rate is assessed in terms of its influence on the heat stress in the potroom. It is found the 50% reduction of pot draft will not cause a significant change in the ventilation pattern of potroom and the draft reduction can be realised without significantly increasing the potroom's heat stress.<br/> © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.},\nkey = {Waste heat},\n%keywords = {Thermal comfort;Thermal stress;Aluminum;Ventilation;Heating;Office buildings;Waste heat utilization;},\n%note = {Aluminum smelter;Aluminum smelting;duration limited exposure (DLE);Industrial buildings;Natural ventilation;Ventilation patterns;Ventilation performance;Volume of airs;},\nURL = {http://dx.doi.org/10.1080/14733315.2018.1435028},\n} \n\n\n\n
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\n Potrooms are elongated buildings in which hundreds of aluminum smelting pots are housed, and have the particularity, among others, to be naturally ventilated. A CFD model simulating a potroom is developed to study its thermal comfort when the aluminum smelting pots take in less volume of air so as to facilitate waste heat recovery from the pot draft. The influences of wind and buoyancy on the ventilation performance of the potroom are simultaneously considered. The heat stress during hot weather is estimated for different cases. A 50% reduction in the pot draft rate is assessed in terms of its influence on the heat stress in the potroom. It is found the 50% reduction of pot draft will not cause a significant change in the ventilation pattern of potroom and the draft reduction can be realised without significantly increasing the potroom's heat stress.
© 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.\n
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\n \n\n \n \n \n \n \n Investigating the performance of multiple tuned mass dampers on long span cable stayed bridge under multiple support excitation.\n \n \n \n\n\n \n Momeni, Z.; and Bagchi, A.\n\n\n \n\n\n\n In pages 35 - 36, Montreal, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201308355233 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Investigating the performance of multiple tuned mass dampers on long span cable stayed bridge under multiple support excitation},\njournal = {Proceedings of 30th International Conference on Adaptive Structures and Technologies, ICAST 2019},\nauthor = {Momeni, Zahrasadat and Bagchi, Ashutosh},\nyear = {2019},\npages = {35 - 36},\naddress = {Montreal, QC, Canada},\n} \n\n\n
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\n \n\n \n \n \n \n \n Response modification factors for friction dampers as per the 2015 national building code of Canada.\n \n \n \n\n\n \n Naghshineh, A.; Tehrani, F. M.; Galindo, O. R.; and Bagchi, A.\n\n\n \n\n\n\n In pages 11 - 12, Montreal, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201308355222 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Response modification factors for friction dampers as per the 2015 national building code of Canada},\njournal = {Proceedings of 30th International Conference on Adaptive Structures and Technologies, ICAST 2019},\nauthor = {Naghshineh, Ali and Tehrani, Fariborz M. and Galindo, Oscar Romero and Bagchi, Ashutosh},\nyear = {2019},\npages = {11 - 12},\naddress = {Montreal, QC, Canada},\nabstract = {This paper provides information on Response Modification Factors for Friction Dampers as per the 2015 National Building Code of Canada. The presented methodology considers diagonal braces for building frames with varied span lengths of 6m and 8m.<br/> © copyright Environment and Climate Change Canada.},\nkey = {Friction},\n%keywords = {Architectural design;Tribology;Seismic design;},\n%note = {Friction damper;Moderately ductile;Overstrength;Performance based design;Response modification factors;},\n} \n\n\n
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\n This paper provides information on Response Modification Factors for Friction Dampers as per the 2015 National Building Code of Canada. The presented methodology considers diagonal braces for building frames with varied span lengths of 6m and 8m.
© copyright Environment and Climate Change Canada.\n
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\n \n\n \n \n \n \n \n Seismic performance of concrete moment resisting frames in Western Canada.\n \n \n \n\n\n \n Naghshineh, A.; and Bagchi, A.\n\n\n \n\n\n\n In pages 37 - 38, Montreal, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201308355234 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic performance of concrete moment resisting frames in Western Canada},\njournal = {Proceedings of 30th International Conference on Adaptive Structures and Technologies, ICAST 2019},\nauthor = {Naghshineh, Ali and Bagchi, Ashutosh},\nyear = {2019},\npages = {37 - 38},\naddress = {Montreal, QC, Canada},\nabstract = {This paper presented investigation of the seismic performance of a set of code-designed 4, 8 and 12 story moment resisting concrete frames at different hazard levels namely, SLE (Service Level Event), DLE (Design Level Event) and MCE (Maximum Considered Event). Nonlinear static pushover analysis and dynamic time history analysis using a set of ground motion records such as crustal and subduction earthquakes have been used to investigate their effects, the different performance levels of these buildings, and adjust their design based on the corresponding target displacements.<br/> © copyright Environment and Climate Change Canada.},\nkey = {Seismic design},\n%keywords = {Structural frames;Earthquakes;Seismic waves;},\n%note = {Crustal earthquakes;Moment resisting frames;Performance based design;Seismic Performance;Subduction earthquakes;},\n} \n\n\n
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\n This paper presented investigation of the seismic performance of a set of code-designed 4, 8 and 12 story moment resisting concrete frames at different hazard levels namely, SLE (Service Level Event), DLE (Design Level Event) and MCE (Maximum Considered Event). Nonlinear static pushover analysis and dynamic time history analysis using a set of ground motion records such as crustal and subduction earthquakes have been used to investigate their effects, the different performance levels of these buildings, and adjust their design based on the corresponding target displacements.
© copyright Environment and Climate Change Canada.\n
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\n \n\n \n \n \n \n \n A web application for rapid seismic risk assessment.\n \n \n \n\n\n \n Abo El Ezz, A.; Smirnoff, A.; Nastev, M.; Nollet, M.; McGrath, H.; and Gibb, N.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008264145 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {A web application for rapid seismic risk assessment},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Abo El Ezz, A. and Smirnoff, A. and Nastev, M. and Nollet, M.-J. and McGrath, H. and Gibb, N.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Numerous computer models have been developed for seismic loss analyses at urban and regional scales. They seem, however, ill-suited to custom application to the specific Canadian hazard and exposure settings and, more importantly, inadequate for utilization by the broader non-expert public safety community. Therefore, communication of the potential seismic risk results to local stakeholders, such that they can properly understand their exposure and vulnerability, represents an outstanding challenge. The objective of the present study is to describe the methodological background and ongoing development activities of the Rapid Risk Evaluator (ER2), a relatively rapid and user-friendly risk assessment application, developed to overcome the current communication barriers between risk experts and decision makers. Developing ER2 included: pre-computing site-specific databases containing ground motion scenarios, prediction of potential attenuation with distance and local site amplification, a standardized inventories of buildings" structural properties and occupancy categories, and assessment of the seismic vulnerability using hazard-compatible vulnerability functions. These functions correlate directly the intensity of the seismic shaking to the probability of damage and direct economic and social losses. This approach allows for conducting risk scenarios in large urban centers within minutes. The above approach was programmed into an easy to run web-application. Equipped with graphic user interface, ER2 allows non-expert users to run otherwise complex seismic risk scenarios through a simple intuitive selection process. An example of ER2 applied to a hypothetical earthquake event in Quebec City is included to illustrate the simplicity of the user interface and capabilities of the application.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {User interfaces},\n%keywords = {Hazards;Risk assessment;Risk perception;Seismic response;},\n%note = {Computer models;Losses analysis;Regional scale;Risks scenarios;Seismic loss;Seismic risk;Seismic risk assessment;Urban scale;WEB application;Web applications;},\n} \n\n\n
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Numerous computer models have been developed for seismic loss analyses at urban and regional scales. They seem, however, ill-suited to custom application to the specific Canadian hazard and exposure settings and, more importantly, inadequate for utilization by the broader non-expert public safety community. Therefore, communication of the potential seismic risk results to local stakeholders, such that they can properly understand their exposure and vulnerability, represents an outstanding challenge. The objective of the present study is to describe the methodological background and ongoing development activities of the Rapid Risk Evaluator (ER2), a relatively rapid and user-friendly risk assessment application, developed to overcome the current communication barriers between risk experts and decision makers. Developing ER2 included: pre-computing site-specific databases containing ground motion scenarios, prediction of potential attenuation with distance and local site amplification, a standardized inventories of buildings\" structural properties and occupancy categories, and assessment of the seismic vulnerability using hazard-compatible vulnerability functions. These functions correlate directly the intensity of the seismic shaking to the probability of damage and direct economic and social losses. This approach allows for conducting risk scenarios in large urban centers within minutes. The above approach was programmed into an easy to run web-application. Equipped with graphic user interface, ER2 allows non-expert users to run otherwise complex seismic risk scenarios through a simple intuitive selection process. An example of ER2 applied to a hypothetical earthquake event in Quebec City is included to illustrate the simplicity of the user interface and capabilities of the application.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Integrated super-structure and asphalt deck scheduling and optimization framework for bridges.\n \n \n \n\n\n \n Abu-Samra, S.; Ghodoosi, F.; Bagchi, A.; and Amador, L.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263791 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Integrated super-structure and asphalt deck scheduling and optimization framework for bridges},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Abu-Samra, S. and Ghodoosi, F. and Bagchi, A. and Amador, L.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">North America"s bridges are aging and deteriorating. According to the Canada"s infrastructure report, around 40% of the existing bridges are in fair and below condition state, which increases their risk of failure and requires further attention. Furthermore, Canada"s infrastructure deficit is estimated between 110 billion to 270 billion and is annually increasing by 2 billion. Given the tight municipal operating budgets coupled with the pressure of maintaining an acceptable level of service, efficient utilization of the maintenance expenditures is becoming of paramount important not only for bridges, but for all the deteriorating assets. Even though, several scholars developed bridge management systems to schedule the maintenance of the bridge concrete deck. Yet, scholars have not considered the spatial proximity between the concrete structure and the asphalt surface. In the lights of those issues, this paper proposes an integrated bridge super-structure and asphalt deck scheduling and optimization framework to ensure proper expenditures utilization, while maintaining the super-structure condition and asphalt level of service. The framework revolves through five core models: (1) bridges" inventory that contains information about the bridge components, condition state, etc., (2) condition deterioration and future prediction model that simulates the super-structure deterioration across the planning horizon; (3) level of service model that calculates the degradation of the asphalt, represented by the international roughness index; (4) bridge super-structure assessment model that computes a bridges" super-structure combined index for both the concrete deck"s condition and the asphalt"s level of service; and (5) optimization model that relies on evolutionary algorithms and integer programming using genetic algorithms optimization engine to schedule the corridor interventions across the planning horizon. To demonstrate the framework"s functionality, it will be applied to a bridge across 50 years planning horizon. The results resulted in an extension of 45 years in the service life as opposed to the no repair scenario. The bridge superstructure experienced three major rehabilitation and three minor repairs for the concrete superstructure. The age of the bridge superstructure was 78 years, which is 3 years more than the expected design life according to the code. Furthermore, it resulted in an average IRI of 140 in/mi. For the costs, the EUAC of the structural actions was 18,175. However, the EUAC of the asphalt deck IRI enhancement actions was 7,765, which is 40% of the structural actions. The overall EUAC of the combined superstructure was 25,940. In summary, the developed framework is an integrated bridge management solution that assists municipalities in taking informed and coordinated bridge super-structure maintenance decisions, while maintaining an acceptable condition and level of service.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Budget control},\n%keywords = {Bridge decks;Concretes;Condition based maintenance;Deterioration;Genetic algorithms;Integer programming;Repair;Scheduling;Structural design;},\n%note = {Bridge superstructure;Concrete deck;Condition;Condition state;Integrated bridges;Level of Service;Optimization framework;Planning horizons;Scheduling frameworks;Super-structures;},\n} \n\n\n
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North America\"s bridges are aging and deteriorating. According to the Canada\"s infrastructure report, around 40% of the existing bridges are in fair and below condition state, which increases their risk of failure and requires further attention. Furthermore, Canada\"s infrastructure deficit is estimated between 110 billion to 270 billion and is annually increasing by 2 billion. Given the tight municipal operating budgets coupled with the pressure of maintaining an acceptable level of service, efficient utilization of the maintenance expenditures is becoming of paramount important not only for bridges, but for all the deteriorating assets. Even though, several scholars developed bridge management systems to schedule the maintenance of the bridge concrete deck. Yet, scholars have not considered the spatial proximity between the concrete structure and the asphalt surface. In the lights of those issues, this paper proposes an integrated bridge super-structure and asphalt deck scheduling and optimization framework to ensure proper expenditures utilization, while maintaining the super-structure condition and asphalt level of service. The framework revolves through five core models: (1) bridges\" inventory that contains information about the bridge components, condition state, etc., (2) condition deterioration and future prediction model that simulates the super-structure deterioration across the planning horizon; (3) level of service model that calculates the degradation of the asphalt, represented by the international roughness index; (4) bridge super-structure assessment model that computes a bridges\" super-structure combined index for both the concrete deck\"s condition and the asphalt\"s level of service; and (5) optimization model that relies on evolutionary algorithms and integer programming using genetic algorithms optimization engine to schedule the corridor interventions across the planning horizon. To demonstrate the framework\"s functionality, it will be applied to a bridge across 50 years planning horizon. The results resulted in an extension of 45 years in the service life as opposed to the no repair scenario. The bridge superstructure experienced three major rehabilitation and three minor repairs for the concrete superstructure. The age of the bridge superstructure was 78 years, which is 3 years more than the expected design life according to the code. Furthermore, it resulted in an average IRI of 140 in/mi. For the costs, the EUAC of the structural actions was 18,175. However, the EUAC of the asphalt deck IRI enhancement actions was 7,765, which is 40% of the structural actions. The overall EUAC of the combined superstructure was 25,940. In summary, the developed framework is an integrated bridge management solution that assists municipalities in taking informed and coordinated bridge super-structure maintenance decisions, while maintaining an acceptable condition and level of service.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Assessment of resilience of water distribution network against seismic hazards for maintenance planning.\n \n \n \n\n\n \n Adhikary, S.; Nasiri, F.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008264105 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Assessment of resilience of water distribution network against seismic hazards for maintenance planning},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Adhikary, Sudipta and Nasiri, Fuzhan and Bagchi, Ashutosh},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">It is essential that water distribution networks (WDNs) remain performing undeviatingly following constrained to natural hazards, and it is considered vital in terms of seismic hazards, to keep maintaining structural integrity. Several studies on past earthquakes occurred in Vancouver, BC, have prompted notable destruction to WDNs, interpreting them as a potential reason for loss and damage from structural and economic perspective. Based on the behavior of underground water distribution pipelines, this paper suggests a method to quantify resiliency as easy-to-use metrics to improve the performance of water distribution network subjected to earthquakes. In cities like Vancouver, WDNs are prone to seismic hazards and are subject to regular refurbishment and repair. Following such circumstances, early evaluation of existing network"s seismic structural resilience is essential to carry out strategic planning for maintenance and replacement works. In this paper, resilience index is produced for the WDN of the study area (an extensive network consisting of 62,293 links) considering three scenarios of earthquakes ranging between MMI 7 to MMI 10 (very strong to severe). These scenarios are formed using empirical data of past earthquakes, which includes ground motion and break rates of lifelines and the estimated peak ground acceleration (PGA). All the neighborhoods in the study area are ranked from most resilient to least resilient based on index metrics. Maintenance scenarios for the least resilient neighborhood due to the extreme exposure of the event have been produced as maintenance map to improve the resiliency of the system, integrated with the geographical location using software ArcGIS. To build a practical and feasible replacement strategy, 10 maintenance planning with network map is created showing an increase ranges from 0.8% to 41.52% in the total resiliency of the network and an estimated 15.17% to 89.96% increase of the invulnerability in the network mains. Taking cost as a vital limiting agent in the replacement of WDNs, afterward, evaluation of robust replacement alternatives are performed to find out maintenance planning strategy.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Maintenance},\n%keywords = {Earthquakes;Groundwater;Hazards;Planning;Seismic response;Water distribution systems;},\n%note = {Early evaluation;Economic perspective;Maintenance planning;Natural hazard;Neighbourhood;Performance;Seismic hazards;Study areas;Water distribution networks;Water distribution pipelines;},\n} \n\n\n
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It is essential that water distribution networks (WDNs) remain performing undeviatingly following constrained to natural hazards, and it is considered vital in terms of seismic hazards, to keep maintaining structural integrity. Several studies on past earthquakes occurred in Vancouver, BC, have prompted notable destruction to WDNs, interpreting them as a potential reason for loss and damage from structural and economic perspective. Based on the behavior of underground water distribution pipelines, this paper suggests a method to quantify resiliency as easy-to-use metrics to improve the performance of water distribution network subjected to earthquakes. In cities like Vancouver, WDNs are prone to seismic hazards and are subject to regular refurbishment and repair. Following such circumstances, early evaluation of existing network\"s seismic structural resilience is essential to carry out strategic planning for maintenance and replacement works. In this paper, resilience index is produced for the WDN of the study area (an extensive network consisting of 62,293 links) considering three scenarios of earthquakes ranging between MMI 7 to MMI 10 (very strong to severe). These scenarios are formed using empirical data of past earthquakes, which includes ground motion and break rates of lifelines and the estimated peak ground acceleration (PGA). All the neighborhoods in the study area are ranked from most resilient to least resilient based on index metrics. Maintenance scenarios for the least resilient neighborhood due to the extreme exposure of the event have been produced as maintenance map to improve the resiliency of the system, integrated with the geographical location using software ArcGIS. To build a practical and feasible replacement strategy, 10 maintenance planning with network map is created showing an increase ranges from 0.8% to 41.52% in the total resiliency of the network and an estimated 15.17% to 89.96% increase of the invulnerability in the network mains. Taking cost as a vital limiting agent in the replacement of WDNs, afterward, evaluation of robust replacement alternatives are performed to find out maintenance planning strategy.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Effect of changing boundary element size on the response of reinforced concrete masonry shear walls with C-shape boundary element.\n \n \n \n\n\n \n Albutainy, M.; and Galal, K.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008264166 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of changing boundary element size on the response of reinforced concrete masonry shear walls with C-shape boundary element},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Albutainy, Mohammed and Galal, Khaled},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">New ductile reinforced masonry shear walls (RMSW) category with a seismic ductility-related force modification factor, Rd, of 3.0 was introduced in the current Canadian National Building Code and masonry design standards. Consequently, this promotes RMSW as a potential seismic force resisting system (SFRS) alternative in mid-rise buildings. One way of increasing reinforced masonry shear walls curvature and displacement ductility is by adding confined boundary elements to the walls" end zones to enhance the ultimate compressive strain and wall curvature ductility. The boundary elements in the previously tested walls were constructed using regular stretcher blocks. Using regular stretcher blocks caused some limitations due to the geometry restrictions of the stretcher units. This paper reports results of two of six half-scale RM walls with boundary elements specimens that were tested under a reversed cyclic moment and lateral loading. New boundary element block (i.e. C-shaped blocks) were utilized to form the boundary elements in the tested walls to overcome the limitations that arise from using stretched units. These walls represent the plastic hinge zone located in the lower one-and-a-half story of a +10-story RM shear wall building. The wall"s boundary elements are varied in size as well as vertical and transverse reinforcement ratios. The paper presents the experimental work and focuses on quantifying the effect of changing the boundary element size on wall"s lateral capacity, ductility ratio, maximum compressive strain, in-plane mode of failure, amount of dissipated energy and damping ratio.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Reinforced concrete},\n%keywords = {Architectural design;Building codes;Ductility;Energy dissipation;Seismic design;Seismology;Shear flow;Shear walls;},\n%note = {'current;Boundary elements;C shape;Curvature ductility;Element sizes;Force modification factors;Masonry shear walls;Reinforced concrete masonry;Reinforced masonry;Shape boundaries;},\n} \n\n\n
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New ductile reinforced masonry shear walls (RMSW) category with a seismic ductility-related force modification factor, Rd, of 3.0 was introduced in the current Canadian National Building Code and masonry design standards. Consequently, this promotes RMSW as a potential seismic force resisting system (SFRS) alternative in mid-rise buildings. One way of increasing reinforced masonry shear walls curvature and displacement ductility is by adding confined boundary elements to the walls\" end zones to enhance the ultimate compressive strain and wall curvature ductility. The boundary elements in the previously tested walls were constructed using regular stretcher blocks. Using regular stretcher blocks caused some limitations due to the geometry restrictions of the stretcher units. This paper reports results of two of six half-scale RM walls with boundary elements specimens that were tested under a reversed cyclic moment and lateral loading. New boundary element block (i.e. C-shaped blocks) were utilized to form the boundary elements in the tested walls to overcome the limitations that arise from using stretched units. These walls represent the plastic hinge zone located in the lower one-and-a-half story of a +10-story RM shear wall building. The wall\"s boundary elements are varied in size as well as vertical and transverse reinforcement ratios. The paper presents the experimental work and focuses on quantifying the effect of changing the boundary element size on wall\"s lateral capacity, ductility ratio, maximum compressive strain, in-plane mode of failure, amount of dissipated energy and damping ratio.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Effect of shear span-to-depth ratio on the seismic performance of reinforced concrete masonry structural walls with boundary elements.\n \n \n \n\n\n \n Aly, N.; and Galal, K.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008264154 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of shear span-to-depth ratio on the seismic performance of reinforced concrete masonry structural walls with boundary elements},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Aly, N. and Galal, K.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Reinforced Concrete Masonry (RCM) is a competitive alternative construction material for buildings. In the 2015 edition of the National Building Code of Canada (NBCC-2015) a ductile category of RCM shear walls was added. The ductile response could be achieved in RCM shear walls by integrating confined masonry boundary elements to the ends of the rectangular walls. Majority of the tested RCM shear walls with boundary elements represented walls in low- to mid-rise buildings. Thus, the intent of this study is to investigate the structural performance of high-rise ductile RCM structural walls with boundary elements under reversed cyclic loading simulating seismic actions. This is achieved by testing two half-scale fully grouted RCM shear walls with boundary elements under quasi-static reversed cyclic loading and constant axial load. The walls were designed and constructed with similar geometry and material properties and were tested under the same level of axial stress. The main parameter investigated in this study is the shear span-to-depth ratio. The tested specimens represented the plastic hinge regions of shear walls in 6-story and 12-story RCM buildings. The results confirmed the capability of the presence of sufficiently confined boundary elements in providing a ductile response for the walls with high aspect ratios. The reduction in the aspect ratio (from 6-story to 12-story) triggered a higher contribution from the shear mechanisms and increased the rate of cyclic strength degradation. The normalized response of the two walls demonstrated the limited influence of the changes in height relative to the impact of changes in the cross-section configuration.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Shear walls},\n%keywords = {Aspect ratio;Building codes;Concrete buildings;Concrete construction;Cyclic loads;Ductility;Reinforced concrete;Seismology;Shear flow;Structural analysis;},\n%note = {Boundary elements;Confined masonry;Masonry shear walls;National Building Code of Canada;Reinforced concrete masonry;Reversed cyclic loading;Seismic Performance;Shear span-to-depth ratios;Structural performance;Structural walls;},\n} \n\n\n
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Reinforced Concrete Masonry (RCM) is a competitive alternative construction material for buildings. In the 2015 edition of the National Building Code of Canada (NBCC-2015) a ductile category of RCM shear walls was added. The ductile response could be achieved in RCM shear walls by integrating confined masonry boundary elements to the ends of the rectangular walls. Majority of the tested RCM shear walls with boundary elements represented walls in low- to mid-rise buildings. Thus, the intent of this study is to investigate the structural performance of high-rise ductile RCM structural walls with boundary elements under reversed cyclic loading simulating seismic actions. This is achieved by testing two half-scale fully grouted RCM shear walls with boundary elements under quasi-static reversed cyclic loading and constant axial load. The walls were designed and constructed with similar geometry and material properties and were tested under the same level of axial stress. The main parameter investigated in this study is the shear span-to-depth ratio. The tested specimens represented the plastic hinge regions of shear walls in 6-story and 12-story RCM buildings. The results confirmed the capability of the presence of sufficiently confined boundary elements in providing a ductile response for the walls with high aspect ratios. The reduction in the aspect ratio (from 6-story to 12-story) triggered a higher contribution from the shear mechanisms and increased the rate of cyclic strength degradation. The normalized response of the two walls demonstrated the limited influence of the changes in height relative to the impact of changes in the cross-section configuration.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n The effect of waste rock inclusions on the seismic stability of a tailings impoundment.\n \n \n \n\n\n \n Aubertin, M.; Jahanbakhshzadeh, A.; and Yniesta, S.\n\n\n \n\n\n\n In pages 1220 - 1227, Rome, Italy, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201108282200 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {The effect of waste rock inclusions on the seismic stability of a tailings impoundment},\njournal = {Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019},\nauthor = {Aubertin, M. and Jahanbakhshzadeh, A. and Yniesta, S.},\nyear = {2019},\npages = {1220 - 1227},\naddress = {Rome, Italy},\nabstract = {Surface disposal of tailings from hard rock mines raises various geotechnical issues, including the risk of seismic instability. Waste rock inclusions (WRI) may be used to improve the geotechnical response of tailings impoundments. The advantages of WRI include accelerated consolidation and drainage of the tailings and physical reinforcement of the impoundment. A major research project is underway in Québec, Canada, to assess the geotechnical response of tailings impoundments with WRI. The research program includes extensive laboratory characterisation, physical model tests, in-situ monitoring at a mine site where WRI are in use, and a series of numerical simulations to evaluate the response of retaining dikes under various loading conditions. Results from the latter component of this project are presented here, with a summary of the related geotechnical investigation. The numerical modelling calculations simulating the behavior of dikes during earthquakes illustrate how WRI can be used to enhance the seismic response of a tailings impoundment.<br/> © 2019 Associazione Geotecnica Italiana, Rome, Italy.},\nkey = {Numerical models},\n%keywords = {Software testing;Tailings;Geotechnical engineering;Levees;Earthquakes;},\n%note = {Geotechnical investigations;Hard rock mines;In- situ monitoring;Loading condition;Physical model test;Research programs;Seismic stability;Surface disposal;},\n} \n\n\n
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\n Surface disposal of tailings from hard rock mines raises various geotechnical issues, including the risk of seismic instability. Waste rock inclusions (WRI) may be used to improve the geotechnical response of tailings impoundments. The advantages of WRI include accelerated consolidation and drainage of the tailings and physical reinforcement of the impoundment. A major research project is underway in Québec, Canada, to assess the geotechnical response of tailings impoundments with WRI. The research program includes extensive laboratory characterisation, physical model tests, in-situ monitoring at a mine site where WRI are in use, and a series of numerical simulations to evaluate the response of retaining dikes under various loading conditions. Results from the latter component of this project are presented here, with a summary of the related geotechnical investigation. The numerical modelling calculations simulating the behavior of dikes during earthquakes illustrate how WRI can be used to enhance the seismic response of a tailings impoundment.
© 2019 Associazione Geotecnica Italiana, Rome, Italy.\n
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\n \n\n \n \n \n \n \n Multiple damage localization of gravity dam: Strain energy based approach using random data.\n \n \n \n\n\n \n Bagchi, S.; Roy, T.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263743 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Multiple damage localization of gravity dam: Strain energy based approach using random data},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Bagchi, S. and Roy, T.B. and Bagchi, A.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Continuous monitoring of large-concrete structures like Dam, using information obtained using the health monitoring system, is necessary for the prognosis of its premature degradation. In this study, Koyna dam, is modeled in 2D using ABAQUS software. Material properties of the dam material are assumed to be linear and elastic. The model is first validated against the available results for Koyna Dam. As real-time vibration data is sparse for the structures like Dam due to its size and location, White Gaussian Noise is used for generating the simulated ambient response. Damage is incorporated in the numerical model introducing suitable change in the modulus of elasticity of the elements at some specific locations. The dynamic properties of both the pristine as well as the damaged structures, including the natural frequency, Displacement Mode Shape (DMS), Curvature Mode Shape (CMS) and Strain Energy Mode Shape (SEMS) are compared to identify the appropriate parameter that can identify the damage up to the tire of quantification. Studying the modal responses of the numerical model of the gravity dam it is inferred that the neither natural frequency nor DMS or CMS are capable of identifying the region of the stiffness change with acceptable accuracy. While on the other hand, 1<sup>st</sup> eigen mode shows that SEMS can identify the damaged location with sufficient accuracy. Therefore, in this study Strain Energy based damage index is used for quantifying the damage.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Numerical models},\n%keywords = {ABAQUS;Damage detection;Gaussian noise (electronic);Gravity dams;Information use;Location;Natural frequencies;Strain energy;Structural health monitoring;},\n%note = {ABAQUS software;Continuous monitoring;Damage localization;Displacement modes;Energy based approach;Health monitoring system;Mode shapes;Multiple damages;Random data;Strain energy mode shapes;},\n} \n\n\n
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Continuous monitoring of large-concrete structures like Dam, using information obtained using the health monitoring system, is necessary for the prognosis of its premature degradation. In this study, Koyna dam, is modeled in 2D using ABAQUS software. Material properties of the dam material are assumed to be linear and elastic. The model is first validated against the available results for Koyna Dam. As real-time vibration data is sparse for the structures like Dam due to its size and location, White Gaussian Noise is used for generating the simulated ambient response. Damage is incorporated in the numerical model introducing suitable change in the modulus of elasticity of the elements at some specific locations. The dynamic properties of both the pristine as well as the damaged structures, including the natural frequency, Displacement Mode Shape (DMS), Curvature Mode Shape (CMS) and Strain Energy Mode Shape (SEMS) are compared to identify the appropriate parameter that can identify the damage up to the tire of quantification. Studying the modal responses of the numerical model of the gravity dam it is inferred that the neither natural frequency nor DMS or CMS are capable of identifying the region of the stiffness change with acceptable accuracy. While on the other hand, 1st eigen mode shows that SEMS can identify the damaged location with sufficient accuracy. Therefore, in this study Strain Energy based damage index is used for quantifying the damage.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Should we consider the plastic capacity of structural systems in the design of wind-excited buildings? A critical examination of damage accumulation, ductility demand, and hysteretic energy.\n \n \n \n\n\n \n Bezabeh, M.; Bitsuamlak, G.; and Tesfamariam, S.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263888 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Should we consider the plastic capacity of structural systems in the design of wind-excited buildings? A critical examination of damage accumulation, ductility demand, and hysteretic energy},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Bezabeh, Matiyas and Bitsuamlak, Girma and Tesfamariam, Solomon},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">The lateral strength and stiffness requirements due to wind loads usually govern the design of tall buildings. The current building codes in the U.S.A, Canada, and Europe recognize the first significant yield point as an ultimate limit state. The main argument used in favor of linear-elastic design approach is its presumed ability to avoid unidirectional yielding and the subsequent damage accumulation due to the longer duration of wind storms. Consequently, the current design practices ignore the plastic capacity of structural systems in the nonlinear range, which could result in uneconomical and brittle buildings. Thus, in this paper, we re-examined the classical linear-elastic design arguments with consideration of performance-based wind engineering approaches, innovative technologies, and materials. As the first step towards PBWE, this paper has demonstrated the benefits of considering the nonlinear capacity of structural systems in the design of wind-excited buildings. In all, we have postulated, then proved, the capability of self-centering systems in controlling the possible damage accumulation in structural systems subjected to long-duration wind loads. Our arguments are based on an extensive parametric study through nonlinear time history analyses considering peak and residual ductility-demands, normalized hysteretic energy dissipation, and the rate of damage accumulation as performance indicators. Overall, the results of the study revealed that self-centering systems could benefit the most from the "ductility-based" design due to their inherent re-centering capability, higher energy dissipation, and their less sensitivity to wind duration.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Tall buildings},\n%keywords = {Aerodynamic loads;Architectural design;Building codes;Ductility;Energy dissipation;Hysteresis;Stiffness;Structural design;Wind stress;},\n%note = {'current;Damages accumulation;Ductility demands;Elastic designs;Linear elastic;Long duration;Plastic capacity;Self-centering system;Structural systems;Wind load;},\n} \n\n\n
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The lateral strength and stiffness requirements due to wind loads usually govern the design of tall buildings. The current building codes in the U.S.A, Canada, and Europe recognize the first significant yield point as an ultimate limit state. The main argument used in favor of linear-elastic design approach is its presumed ability to avoid unidirectional yielding and the subsequent damage accumulation due to the longer duration of wind storms. Consequently, the current design practices ignore the plastic capacity of structural systems in the nonlinear range, which could result in uneconomical and brittle buildings. Thus, in this paper, we re-examined the classical linear-elastic design arguments with consideration of performance-based wind engineering approaches, innovative technologies, and materials. As the first step towards PBWE, this paper has demonstrated the benefits of considering the nonlinear capacity of structural systems in the design of wind-excited buildings. In all, we have postulated, then proved, the capability of self-centering systems in controlling the possible damage accumulation in structural systems subjected to long-duration wind loads. Our arguments are based on an extensive parametric study through nonlinear time history analyses considering peak and residual ductility-demands, normalized hysteretic energy dissipation, and the rate of damage accumulation as performance indicators. Overall, the results of the study revealed that self-centering systems could benefit the most from the \"ductility-based\" design due to their inherent re-centering capability, higher energy dissipation, and their less sensitivity to wind duration.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Performance of three dowel type steel connectors on the strength and stiffness of hybrid steel deck to wood frame diaphragms.\n \n \n \n\n\n \n Boucher, S.; and Lamarche, C.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263992 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance of three dowel type steel connectors on the strength and stiffness of hybrid steel deck to wood frame diaphragms},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Boucher, S. and Lamarche, C.P.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">An increasing number of hybrid constructions are being designed and built and there is a need to better understand their structural behavior. This paper presents part of a research project about the structural behavior of roof or floor diaphragms made of lightweight steel decks that are attached to a wood structure. The main objective of this paper is to study the strength and stiffness of shear connections using three different dowel type connectors that would potentially allow the construction of structurally and economically efficient steel/wood diaphragms. Steel to wood shear tests were performed on the connections to characterize the failure mode, strength and slip modulus for each connection. Attempts to predict the lateral yield strength and slip modulus of the tested connections using equations proposed in the literature are also presented. Based on the experimental results, the strength and stiffness of steel deck to wood frame diaphragms are presented in order to evaluate whether the connections investigated yield to efficient diaphragm design that could be used in a practical context.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Diaphragms},\n%keywords = {Roofs;Stiffness;Wood;Wooden buildings;Wooden construction;},\n%note = {Floor diaphragms;Hybrid construction;Performance;Slip modulus;Steel connector;Steel decks;Strength and stiffness;Strength modulus;Structural behaviors;Wood frame;},\n} \n\n\n
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An increasing number of hybrid constructions are being designed and built and there is a need to better understand their structural behavior. This paper presents part of a research project about the structural behavior of roof or floor diaphragms made of lightweight steel decks that are attached to a wood structure. The main objective of this paper is to study the strength and stiffness of shear connections using three different dowel type connectors that would potentially allow the construction of structurally and economically efficient steel/wood diaphragms. Steel to wood shear tests were performed on the connections to characterize the failure mode, strength and slip modulus for each connection. Attempts to predict the lateral yield strength and slip modulus of the tested connections using equations proposed in the literature are also presented. Based on the experimental results, the strength and stiffness of steel deck to wood frame diaphragms are presented in order to evaluate whether the connections investigated yield to efficient diaphragm design that could be used in a practical context.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Evaluation and calibration of pedestrian bridge design standards for vibration serviceability of lightweight bridges.\n \n \n \n\n\n \n Dey, P.; Narasimhan, S.; and Walbridge, S.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263869 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evaluation and calibration of pedestrian bridge design standards for vibration serviceability of lightweight bridges},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Dey, P. and Narasimhan, S. and Walbridge, S.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Rapid advancements in material technology have paved the way for lightweight yet highly durable materials such as aluminum, providing fascinating opportunities to build lightweight pedestrian bridges. This has resulted in lively bridges, which often suffer excessive vibrations leading to serviceability problems under pedestrian-induced loads. Various standards for serviceability design have been developed, primarily based on low-frequency bridges. These standards have overlooked the altered mass-stiffness relationship for lightweight structures, which often induce high-frequency responses. Another central issue in their design is proper consideration of the uncertainties in the pedestrian loading. This study underscores the deficiencies in current standards by comparing predictions with measurements from aluminum pedestrian bridges. Experimental results from two full-scale bridges show significant differences in the predictions by the design models as compared to the measurements. Accordingly, modifications have been recommended to better align predictions with experimental observations, which also harmonize these standards amongst each other. In addition, a reliability-based evaluation is carried out on code-compliant bridges by incorporating the uncertainties associated with the various parameters in the design process. Based on the evaluation results, the design equations are calibrated for higher reliability indices and partial factors for the calibrated design equation are estimated. For economic designs, user comfort limits based on the frequency of occurrence of the traffic event and the class of pedestrian bridge are adopted during the calibration process. The calibrated design standards ensure acceptable performance during both design and non-frequent heavy traffic loading events, while at the same time yielding economic designs.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Footbridges},\n%keywords = {Aluminum;Calibration;Design;Forecasting;Frequency response;},\n%note = {Bridge design;Design equation;Design standard;Durable materials;Economic design;Materials technology;Serviceability designs;Serviceability problems;Uncertainty;Vibration serviceability;},\n} \n\n\n
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Rapid advancements in material technology have paved the way for lightweight yet highly durable materials such as aluminum, providing fascinating opportunities to build lightweight pedestrian bridges. This has resulted in lively bridges, which often suffer excessive vibrations leading to serviceability problems under pedestrian-induced loads. Various standards for serviceability design have been developed, primarily based on low-frequency bridges. These standards have overlooked the altered mass-stiffness relationship for lightweight structures, which often induce high-frequency responses. Another central issue in their design is proper consideration of the uncertainties in the pedestrian loading. This study underscores the deficiencies in current standards by comparing predictions with measurements from aluminum pedestrian bridges. Experimental results from two full-scale bridges show significant differences in the predictions by the design models as compared to the measurements. Accordingly, modifications have been recommended to better align predictions with experimental observations, which also harmonize these standards amongst each other. In addition, a reliability-based evaluation is carried out on code-compliant bridges by incorporating the uncertainties associated with the various parameters in the design process. Based on the evaluation results, the design equations are calibrated for higher reliability indices and partial factors for the calibrated design equation are estimated. For economic designs, user comfort limits based on the frequency of occurrence of the traffic event and the class of pedestrian bridge are adopted during the calibration process. The calibrated design standards ensure acceptable performance during both design and non-frequent heavy traffic loading events, while at the same time yielding economic designs.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Structural stability of concrete spillway piers: Development and application of 3D fiber elements including shear and warping deformations.\n \n \n \n\n\n \n Do, V.; and Leger, P.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263958 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Structural stability of concrete spillway piers: Development and application of 3D fiber elements including shear and warping deformations},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Do, V.T. and Leger, P.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">This paper presents a new higher order 3D fiber element using beam theory leading to a 18x18-stiffness matrix including shear and torsional warping. This element is used to analyze the structural response of concrete spillway piers with deep variable cross-sections subjected to 3D loads. The element stiffness matrix is computed from numerical integration using a mixed formulation: (i) the flexibility method is used for flexural and shear influence coefficients; (ii) the displacement method is used for torsional influence coefficients (Saint"Venant and warping). The element (fibers) cross sections along the beam are first discretized at Gauss points using the 2D finite element method (FEM). The element stiffness matrix is then computed from Gauss integration of cross-sectional stiffness coefficients. This novel deep beam model allowing to consider combination of axial, bending, shear and torsional loads is implemented in a MATLAB code. A beam-column example for deep beam is considered to verify and validate the proposed model by comparisons with 3D ABAQUS finite element solutions using solid elements.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {ABAQUS},\n%keywords = {Concretes;Finite element method;MATLAB;Numerical methods;Piers;Spillways;Stability;Stiffness;Stiffness matrix;},\n%note = {3D fibers;Deep beam;Development and applications;Element stiffness matrix;Fiber elements;High-order;Influence coefficient;New high;Structural stabilities;Warping deformations;},\n} \n\n\n
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This paper presents a new higher order 3D fiber element using beam theory leading to a 18x18-stiffness matrix including shear and torsional warping. This element is used to analyze the structural response of concrete spillway piers with deep variable cross-sections subjected to 3D loads. The element stiffness matrix is computed from numerical integration using a mixed formulation: (i) the flexibility method is used for flexural and shear influence coefficients; (ii) the displacement method is used for torsional influence coefficients (Saint\"Venant and warping). The element (fibers) cross sections along the beam are first discretized at Gauss points using the 2D finite element method (FEM). The element stiffness matrix is then computed from Gauss integration of cross-sectional stiffness coefficients. This novel deep beam model allowing to consider combination of axial, bending, shear and torsional loads is implemented in a MATLAB code. A beam-column example for deep beam is considered to verify and validate the proposed model by comparisons with 3D ABAQUS finite element solutions using solid elements.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Integrated building design and energy simulation.\n \n \n \n\n\n \n Dorey, C.; Valinejadshoubi, M.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263887 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Integrated building design and energy simulation},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Dorey, Coleen and Valinejadshoubi, Mojtaba and Bagchi, Ashutosh},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Energy consumption in buildings constitute a significant portion of the total energy demand in Canada (about 40%). While the design and construction of energy efficient buildings is gaining momentum, it is important to have an integrated process for the design. The present article focuses on the integrated design process at the conceptual phase to account for energy efficiency and adoption of renewable energy in buildings. The research is divided into three phases. Phase one includes the optimization of the design of a single-family home in Montreal based on the following criteria; space, aesthetics, energy performance and cost. Each of the above criteria was evaluated over 22 designs and the importance of each category weighted according to public opinion. As a result, cost was considered as the most important category (weighting of 30%), followed by space (28%), energy performance (25%) and aesthetics (17%). The top three designs are further evaluated. Phase two, includes a detailed analysis of the building envelope, following the insulation requirements of the Quebec Construction Code. An energy analysis was conducted and the top performing building was selected for further analysis. Characteristics of the top performing building include, simple building geometry, a brick facade, windows located on the North and South facade, and a hip roof over the living area with a flat roof over the garage. The energy analysis results are carried over to phase three, where the possibility of renewable and sustainable energy saving techniques are explored to reduce external energy requirements.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Energy utilization},\n%keywords = {Architectural design;Construction;Energy efficiency;Energy management;Roofs;Social aspects;},\n%note = {Building energy;Design simulations;Energy analysis;Energy performance;Energy simulation;Energy-consumption;In-buildings;Integrated building design;Renewable energies;Total energy;},\n} \n\n\n
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Energy consumption in buildings constitute a significant portion of the total energy demand in Canada (about 40%). While the design and construction of energy efficient buildings is gaining momentum, it is important to have an integrated process for the design. The present article focuses on the integrated design process at the conceptual phase to account for energy efficiency and adoption of renewable energy in buildings. The research is divided into three phases. Phase one includes the optimization of the design of a single-family home in Montreal based on the following criteria; space, aesthetics, energy performance and cost. Each of the above criteria was evaluated over 22 designs and the importance of each category weighted according to public opinion. As a result, cost was considered as the most important category (weighting of 30%), followed by space (28%), energy performance (25%) and aesthetics (17%). The top three designs are further evaluated. Phase two, includes a detailed analysis of the building envelope, following the insulation requirements of the Quebec Construction Code. An energy analysis was conducted and the top performing building was selected for further analysis. Characteristics of the top performing building include, simple building geometry, a brick facade, windows located on the North and South facade, and a hip roof over the living area with a flat roof over the garage. The energy analysis results are carried over to phase three, where the possibility of renewable and sustainable energy saving techniques are explored to reduce external energy requirements.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Evaluation of two constitutive models in predicting cyclic behavior of a natural clay.\n \n \n \n\n\n \n Eslami, M.; Zarrabi, M.; and Yniesta, S.\n\n\n \n\n\n\n In pages 2275 - 2282, Rome, Italy, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201108281727 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Evaluation of two constitutive models in predicting cyclic behavior of a natural clay},\njournal = {Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019},\nauthor = {Eslami, M.M. and Zarrabi, M. and Yniesta, S.},\nyear = {2019},\npages = {2275 - 2282},\naddress = {Rome, Italy},\nabstract = {A series of cyclic and monotonic constant-height direct simple shear experiments were conducted on Young San Francisco Bay Mud. Two bounding surface constitutive models have been implemented for numerical simulations of the cyclic behavior of the Young Bay Mud. This paper discusses key differences in predictions of the two constitutive models in simulating the cyclic behavior of the specimens tested in the laboratory. Both models were calibrated using an advanced optimization technique to remove bias introduced by trial and error calibration methods. Comparison of the results of the simulations and laboratory test data show significant differences and indicates that some fundamental features of cyclic behavior of clays cannot be captured by currently available models, suggesting it may be necessary to develop more robust constitutive models that have capability of better capturing pore-pressure response and cyclic strain development during cyclic loading.<br/> © 2019 Associazione Geotecnica Italiana, Rome, Italy.},\nkey = {Constitutive models},\n%keywords = {Earthquakes;Geotechnical engineering;},\n%note = {Bounding surfaces;Direct simple shears;Fundamental features;Laboratory test;Optimization techniques;Pressure response;San Francisco Bay;Trial-and-error calibration;},\n} \n\n\n
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\n A series of cyclic and monotonic constant-height direct simple shear experiments were conducted on Young San Francisco Bay Mud. Two bounding surface constitutive models have been implemented for numerical simulations of the cyclic behavior of the Young Bay Mud. This paper discusses key differences in predictions of the two constitutive models in simulating the cyclic behavior of the specimens tested in the laboratory. Both models were calibrated using an advanced optimization technique to remove bias introduced by trial and error calibration methods. Comparison of the results of the simulations and laboratory test data show significant differences and indicates that some fundamental features of cyclic behavior of clays cannot be captured by currently available models, suggesting it may be necessary to develop more robust constitutive models that have capability of better capturing pore-pressure response and cyclic strain development during cyclic loading.
© 2019 Associazione Geotecnica Italiana, Rome, Italy.\n
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\n \n\n \n \n \n \n \n Wind loads on canopies attached to walls of low buildings.\n \n \n \n\n\n \n Faruk Ahmed, S.; Zannatul Mawa, D.; Theodore, S.; Anjan, K. B.; and Hatem, A.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263989 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Wind loads on canopies attached to walls of low buildings},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Faruk Ahmed, Sakib and Zannatul Mawa, Dalia and Theodore, Stathopoulos and Anjan, K. Bhowmick and Hatem, Alrawashdeh},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Overhangs are commonly used in residential and industrial buildings for the convenience of residents and users. Canopies are very prone to wind due to the suction developing on their upper surface along with the pressure occurring on their lower surface (for most wind directions), which together may generate critical uplift forces causing serious damage. The current paper presents research data originated mainly from atmospheric boundary layer wind tunnel studies. Also, the paper will shed some light on the current deign provisions recently included in ASCE 7 (2016). Comparisons of the experimental results with the computational results and the provisions of wind codes and standards show significant discrepancies. Some of these differences are due to the various configurations used in the previous studies, e.g. building geometry, size and slope of overhangs, canopy location on the wall(s), existence of openings, as well as roof shape (flat, gabled or curved / arched).<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Atmospheric boundary layer},\n%keywords = {Office buildings;Walls (structural partitions);Wind tunnels;},\n%note = {'current;Boundary layer wind tunnel;Industrial buildings;Low buildings;Research data;Residential building;Uplift forces;Upper surface;Wind directions;Wind load;},\n} \n\n\n
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Overhangs are commonly used in residential and industrial buildings for the convenience of residents and users. Canopies are very prone to wind due to the suction developing on their upper surface along with the pressure occurring on their lower surface (for most wind directions), which together may generate critical uplift forces causing serious damage. The current paper presents research data originated mainly from atmospheric boundary layer wind tunnel studies. Also, the paper will shed some light on the current deign provisions recently included in ASCE 7 (2016). Comparisons of the experimental results with the computational results and the provisions of wind codes and standards show significant discrepancies. Some of these differences are due to the various configurations used in the previous studies, e.g. building geometry, size and slope of overhangs, canopy location on the wall(s), existence of openings, as well as roof shape (flat, gabled or curved / arched).
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Scénarios de risque sismique d'un réseau municipal de ponts pour l'évaluation des impacts économiques.\n \n \n \n\n\n \n Fezai, H.; Nollet, M.; and Abo El Ezz, A.\n\n\n \n\n\n\n In volume 2019-June, Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008264108 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Scénarios de risque sismique d'un réseau municipal de ponts pour l'évaluation des impacts économiques},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Fezai, H. and Nollet, M.-J. and Abo El Ezz, A.},\nvolume = {2019-June},\nyear = {2019},\naddress = {Laval, QC, Canada},\n} \n\n\n
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\n \n\n \n \n \n \n \n The use of reliability analysis in bid decision-making process.\n \n \n \n\n\n \n Ghodoosi, F.; Bagchi, A.; and Hosseini, M.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008264069 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {The use of reliability analysis in bid decision-making process},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Ghodoosi, F. and Bagchi, A. and Hosseini, M.R.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">In general, contractors prepare bid offers within a short and limited time, when they rely on their experience and intuition. In this process, a wide range of factors may have an impact on the bid pricing risk. Of these, the client"s reputation or the record of the projects owned by the client may entail vital contribution on the issue. This study develops a practical quantitative approach which enables estimators to process the bid risk allocation in an easy and rapid manner. Through reliability analysis, the developed method enables practitioners to make informed bid/no-bid decisions based on estimating the probability of the cost overrun. The cost overrun probability distribution is adopted to estimate the expected value of such variable. The practicability of this proposed method is tested against empirical data obtained from 40 university construction projects. The contribution of this study is to provide a simple, rapid and cost-effective method applicable in bid decision-making processes.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Reliability analysis},\n%keywords = {Cost benefit analysis;Cost effectiveness;Cost estimating;Decision making;Probability distributions;},\n%note = {Bid decision making;Cost-overruns;Decision-based;Decision-making process;Expected values;General contractors;Pricing risks;Probability: distributions;Quantitative approach;Risk allocation;},\n} \n\n\n
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In general, contractors prepare bid offers within a short and limited time, when they rely on their experience and intuition. In this process, a wide range of factors may have an impact on the bid pricing risk. Of these, the client\"s reputation or the record of the projects owned by the client may entail vital contribution on the issue. This study develops a practical quantitative approach which enables estimators to process the bid risk allocation in an easy and rapid manner. Through reliability analysis, the developed method enables practitioners to make informed bid/no-bid decisions based on estimating the probability of the cost overrun. The cost overrun probability distribution is adopted to estimate the expected value of such variable. The practicability of this proposed method is tested against empirical data obtained from 40 university construction projects. The contribution of this study is to provide a simple, rapid and cost-effective method applicable in bid decision-making processes.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Substructuring strategy for pseudo-dynamic testing of steel lattice towers.\n \n \n \n\n\n \n Kammouh, R.; Sad Saoud, K.; Lamarche, C.; Langlois, S.; and Loignon, A.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263985 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Substructuring strategy for pseudo-dynamic testing of steel lattice towers.},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Kammouh, R. and Sad Saoud, K. and Lamarche, C.-P. and Langlois, S. and Loignon, A.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Lattice towers are the most commonly used structures in the field of overhead power transmission lines. In the design process of transmission lines, there are several methods for the evaluation of their capacity. The most common design method involves the use of three-dimensional linear elastic truss analyses to evaluate the axial forces in the pin-ended members. The resulting design is normally validated by full-scale experimental tests. These tests are very expensive and time-consuming. Moreover, the rarity of the testing facilities represents an additional difficulty. Hence there is an interest of using substructured pseudo-dynamic testing methods in which the experimental substructure, tested in a laboratory environment, interacts with a numerical model to emulate the structural behaviour of a complete structure. This method has several advantages but requires several preliminary analyses and planning for defining the critical substructure, dynamic parameters, and the setup"s flexibility. This work aims to develop a completely numerical substructuring strategy using the finite element software Code_Aster to ensure relevance and simplify the preparation and planning of pseudo-dynamic tests on lattice towers. An example of a lattice tower, under quasi-static load case is presented and compared with reference numerical analyses" results. The effect of dynamic parameters (time step, damping ratio and load rate) on the emulated structure"s behaviour is analyzed in detail. Finally, the effects due to the flexibility of a simplified test set-up on the accuracy of the test results is studied.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Electric lines},\n%keywords = {Numerical methods;Software testing;Steel testing;Towers;},\n%note = {Design method;Design-process;Dynamic parameters;Lattice towers;Linear elastic;Power transmission lines;Pseudo-dynamic testing;Steel lattice;Sub-structuring;Transmission-line;},\n} \n\n\n
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Lattice towers are the most commonly used structures in the field of overhead power transmission lines. In the design process of transmission lines, there are several methods for the evaluation of their capacity. The most common design method involves the use of three-dimensional linear elastic truss analyses to evaluate the axial forces in the pin-ended members. The resulting design is normally validated by full-scale experimental tests. These tests are very expensive and time-consuming. Moreover, the rarity of the testing facilities represents an additional difficulty. Hence there is an interest of using substructured pseudo-dynamic testing methods in which the experimental substructure, tested in a laboratory environment, interacts with a numerical model to emulate the structural behaviour of a complete structure. This method has several advantages but requires several preliminary analyses and planning for defining the critical substructure, dynamic parameters, and the setup\"s flexibility. This work aims to develop a completely numerical substructuring strategy using the finite element software Code_Aster to ensure relevance and simplify the preparation and planning of pseudo-dynamic tests on lattice towers. An example of a lattice tower, under quasi-static load case is presented and compared with reference numerical analyses\" results. The effect of dynamic parameters (time step, damping ratio and load rate) on the emulated structure\"s behaviour is analyzed in detail. Finally, the effects due to the flexibility of a simplified test set-up on the accuracy of the test results is studied.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Characterization of the lateral capacity of unreinforced masonry residential buildings in Montreal for seismic risk study.\n \n \n \n\n\n \n Kraiem, M.; Gendron, A.; Nollet, M.; and Chouinard, L.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008264104 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Characterization of the lateral capacity of unreinforced masonry residential buildings in Montreal for seismic risk study},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Kraiem, M. and Gendron, A. and Nollet, M.-J. and Chouinard, L.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">In Montreal Island 14% of the existing residential building stock is identified as unreinforced masonry structures (URM). These buildings were built between 1860 and 1915 in the central sectors of Montreal and have URM bearing walls and interior wood framing. This type of residential building presents several differences with the URM building class defined in the Canadian or American version of Hazus software used for seismic risk assessment studies. This paper has two objectives: (1) to propose a structural and dynamic characterization of those URM residential buildings, and (2) to evaluate their lateral capacity. Structural characterization was conducted through visual inspections of buildings undergoing renovation and through a literature review on the history of residential construction and architecture in Montreal. It consists of information on construction materials, the composition and dimensions of the roof, walls, floors and foundations, as well as details on connections between elements. Ambient vibration measurements were used to obtain the fundamental periods, mode shapes and damping of the structures. The collected data were used to develop a macro-element model based on idealization of the building as an equivalent frame. Modal and pushover analyses were conducted using the software 3-Muri to derive the capacity curve of two prototype buildings, with a mansard roof and with a regular flat roof. An additional model with a row of 6 buildings was also analyzed. First results indicate the influence of the roof system on the lateral response and the increase in rigidity for buildings part of a row of houses.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Roofs},\n%keywords = {Housing;Masonry materials;Risk assessment;Seismology;Walls (structural partitions);},\n%note = {Bearing walls;Existing residential buildings;Lateral capacity;Residential building;Residential building stocks;Seismic risk;Structural characterization;Unreinforced masonries (URMs);Unreinforced masonry structures;Wood framing;},\n} \n\n\n
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In Montreal Island 14% of the existing residential building stock is identified as unreinforced masonry structures (URM). These buildings were built between 1860 and 1915 in the central sectors of Montreal and have URM bearing walls and interior wood framing. This type of residential building presents several differences with the URM building class defined in the Canadian or American version of Hazus software used for seismic risk assessment studies. This paper has two objectives: (1) to propose a structural and dynamic characterization of those URM residential buildings, and (2) to evaluate their lateral capacity. Structural characterization was conducted through visual inspections of buildings undergoing renovation and through a literature review on the history of residential construction and architecture in Montreal. It consists of information on construction materials, the composition and dimensions of the roof, walls, floors and foundations, as well as details on connections between elements. Ambient vibration measurements were used to obtain the fundamental periods, mode shapes and damping of the structures. The collected data were used to develop a macro-element model based on idealization of the building as an equivalent frame. Modal and pushover analyses were conducted using the software 3-Muri to derive the capacity curve of two prototype buildings, with a mansard roof and with a regular flat roof. An additional model with a row of 6 buildings was also analyzed. First results indicate the influence of the roof system on the lateral response and the increase in rigidity for buildings part of a row of houses.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Effect of superabsorbent polymer on mitigating damages at steel bar-concrete interface.\n \n \n \n\n\n \n Mousavi, S.; Ouellet-Plamondon, C.; and Guizani, L.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008264155 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Effect of superabsorbent polymer on mitigating damages at steel bar-concrete interface},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Mousavi, S.S. and Ouellet-Plamondon, C. and Guizani, L.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Autogenous healing capacity of concrete has been considered in the last decades for mitigating internal damages in concrete structures. However, there is no specific research for healing cracks at rebar-concrete interfaces. Superabsorbent polymer (SAP) is used in this study to produce SAP concrete as a smart generation of concrete for autogenously healing cracks perpendicular to the rebar direction. An experimental program was conducted to check the performance of SAP as a healing agent in comparison with the reference mix. Two types of SAP particle sizes were considered and tested in this program with 0.25 %wt. of cement. Controlled displacement loading with the rate of 0.15 mm/min was applied to prevent unexpected splitting failure during pre-cracking process. Two period of 14 and 28 days were considered for healing internal damages. Although bond strength is relatively lower in SAP-based concrete compared to the normal concrete because of macro pores at SAP locations, results show a good healing effect for maximum bond strength within the cracks of cracked SAP-based concrete subjected to wet-dry recurring cycles. Also the position and non-uniform shape of SAP voids has a big effect on crack path so that provide an appropriate condition for healing. Generally, findings evidently support the hypothesis that concrete composition could be a key parameter for controlling cracks at rebar-concrete interfacial surfaces. Obtained results show that concrete with SAP shows higher healing capacity compared to the concrete without SAP.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Concretes},\n%keywords = {Bond strength (materials);Software testing;},\n%note = {Concrete interface;Experimental program;Healing agents;Internal damages;Performance;Polymer based;Polymer concretes;Rebar concretes;Steel bars;Superabsorbent polymer;},\n} \n\n\n
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Autogenous healing capacity of concrete has been considered in the last decades for mitigating internal damages in concrete structures. However, there is no specific research for healing cracks at rebar-concrete interfaces. Superabsorbent polymer (SAP) is used in this study to produce SAP concrete as a smart generation of concrete for autogenously healing cracks perpendicular to the rebar direction. An experimental program was conducted to check the performance of SAP as a healing agent in comparison with the reference mix. Two types of SAP particle sizes were considered and tested in this program with 0.25 %wt. of cement. Controlled displacement loading with the rate of 0.15 mm/min was applied to prevent unexpected splitting failure during pre-cracking process. Two period of 14 and 28 days were considered for healing internal damages. Although bond strength is relatively lower in SAP-based concrete compared to the normal concrete because of macro pores at SAP locations, results show a good healing effect for maximum bond strength within the cracks of cracked SAP-based concrete subjected to wet-dry recurring cycles. Also the position and non-uniform shape of SAP voids has a big effect on crack path so that provide an appropriate condition for healing. Generally, findings evidently support the hypothesis that concrete composition could be a key parameter for controlling cracks at rebar-concrete interfacial surfaces. Obtained results show that concrete with SAP shows higher healing capacity compared to the concrete without SAP.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Experimental evaluation of the mechanical parameters for seismic assessment of traditional brick and stone masonry buildings in eastern Canada.\n \n \n \n\n\n \n Nollet, M.; Guizani, L.; Abo El Ezz, A.; Touraille, J.; Boldireff, E.; and Moretti, P.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263920 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental evaluation of the mechanical parameters for seismic assessment of traditional brick and stone masonry buildings in eastern Canada},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Nollet, M.-J. and Guizani, L. and Abo El Ezz, A. and Touraille, J. and Boldireff, E. and Moretti, P.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Eastern Canada has a large stock of old unreinforced masonry buildings, made with brick or stone and with architectural heritage value. To reduce the potential earthquake induced damage to these URM load-bearing walls structures, architects and engineers face the challenge of evaluating their lateral resistance and seismic performance. Evaluation of URM walls lateral resistance is also key information in damage prediction for seismic risk studies. However, there is limited information regarding the mechanical properties of URM walls, leading to difficulty in providing a reliable prediction of their seismic resistance. This paper presents an experimental programme initiated to evaluate the mechanical parameters for seismic assessment of typical traditional brick and stone URM buildings. The first phase aims to characterize the mechanical properties of the masonry and its constituent materials: manufactured moulded bricks typically used as replicas of traditional masonry, limestone blocks and cement-lime mortar used to match the mechanical properties of the original traditional cement-lime mortar. The second phase evaluates the diagonal shear strength of brick or stone masonry wallets. The third phase evaluates the lateral force-deformation behaviour of representative wall specimens under cyclic loading to capture the complex in-plane dynamic response and nonlinear behaviour of the masonry. Results are compared with predictive relations between the constituent material and the masonry mechanical properties. Although most equations from standards could predict the flexural failure mode of the masonry walls tested under cyclic loading, they all tend to overestimate the lateral resistance by up to 38%.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Brick},\n%keywords = {Cements;Cyclic loads;Earthquakes;Forecasting;Lime;Masonry construction;Mortar;Retaining walls;Walls (structural partitions);},\n%note = {Brick masonry;Cement-lime mortars;Constituent materials;Eastern Canada;Experimental evaluation;Lateral resistance;Masonry building;Mechanical parameters;Seismic assessment;Stone masonry;},\n} \n\n\n
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Eastern Canada has a large stock of old unreinforced masonry buildings, made with brick or stone and with architectural heritage value. To reduce the potential earthquake induced damage to these URM load-bearing walls structures, architects and engineers face the challenge of evaluating their lateral resistance and seismic performance. Evaluation of URM walls lateral resistance is also key information in damage prediction for seismic risk studies. However, there is limited information regarding the mechanical properties of URM walls, leading to difficulty in providing a reliable prediction of their seismic resistance. This paper presents an experimental programme initiated to evaluate the mechanical parameters for seismic assessment of typical traditional brick and stone URM buildings. The first phase aims to characterize the mechanical properties of the masonry and its constituent materials: manufactured moulded bricks typically used as replicas of traditional masonry, limestone blocks and cement-lime mortar used to match the mechanical properties of the original traditional cement-lime mortar. The second phase evaluates the diagonal shear strength of brick or stone masonry wallets. The third phase evaluates the lateral force-deformation behaviour of representative wall specimens under cyclic loading to capture the complex in-plane dynamic response and nonlinear behaviour of the masonry. Results are compared with predictive relations between the constituent material and the masonry mechanical properties. Although most equations from standards could predict the flexural failure mode of the masonry walls tested under cyclic loading, they all tend to overestimate the lateral resistance by up to 38%.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Sustainable design of reinforced concrete flat-plate buildings based on cost, embodied energy, and carbon footprint.\n \n \n \n\n\n \n Noman, A.; Bagchi, A.; and Athienitis, A.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263811 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Sustainable design of reinforced concrete flat-plate buildings based on cost, embodied energy, and carbon footprint},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Noman, A. and Bagchi, A. and Athienitis, A.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Energy is required in all phases of a building life cycle. Embodied energy and carbon emissions of a building are associated with production, transportation, disposal, and recycling of materials, and during their construction and demolition. A cost-optimized structural design of individual members is obtained by selecting the quantities of materials that satisfy a certain design-code at a minimum cost. For a reinforced concrete structural element, concrete and rebars are optimized for cost. A member thus proportioned for a minimum cost may not always result in lower embodied energy and carbon emission. A different design approach is needed to reduce the embodied energy and carbon to a lower level. In this study, the objective functions for cost, embodied energy, and CO2 emission were defined and used in the structural design of a set of RC flat-plate residential buildings with 5-, 10-, and 15-storeys, located in Montreal, Canada. The trade-off between the cost and two other variables was studied. It has been found that some significant reduction in embodied energy and CO2 emission is possible for a small increase of the cost for the 5-, 10-, and 15-storey variants. For an optimized solution, the maximum reinforcement ratio of columns has been found to increase with the building height. A slab thickness taken 24% smaller than the minimum thickness specified by CSA 23.3-14 has been found to be most effective in meeting the objective of cost optimization and embodied energy and CO2 emission reduction.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Carbon footprint},\n%keywords = {Architectural design;Carbon dioxide;Cost reduction;Ecodesign;Economic and social effects;Emission control;Life cycle;Materials handling;Plates (structural components);Reinforced concrete;Structural design;Sustainable development;},\n%note = {All phase;Building life cycle;Carbon emissions;CO2 emissions;Embodied carbons;Embodied energy;Energy;Energy emissions;Minimum cost;Reinforced concrete flat plates;},\n} \n\n\n
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Energy is required in all phases of a building life cycle. Embodied energy and carbon emissions of a building are associated with production, transportation, disposal, and recycling of materials, and during their construction and demolition. A cost-optimized structural design of individual members is obtained by selecting the quantities of materials that satisfy a certain design-code at a minimum cost. For a reinforced concrete structural element, concrete and rebars are optimized for cost. A member thus proportioned for a minimum cost may not always result in lower embodied energy and carbon emission. A different design approach is needed to reduce the embodied energy and carbon to a lower level. In this study, the objective functions for cost, embodied energy, and CO2 emission were defined and used in the structural design of a set of RC flat-plate residential buildings with 5-, 10-, and 15-storeys, located in Montreal, Canada. The trade-off between the cost and two other variables was studied. It has been found that some significant reduction in embodied energy and CO2 emission is possible for a small increase of the cost for the 5-, 10-, and 15-storey variants. For an optimized solution, the maximum reinforcement ratio of columns has been found to increase with the building height. A slab thickness taken 24% smaller than the minimum thickness specified by CSA 23.3-14 has been found to be most effective in meeting the objective of cost optimization and embodied energy and CO2 emission reduction.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n The use of Hazcan to assess the earthquake risk of residential buildings in Montreal, Canada.\n \n \n \n\n\n \n Rosset, P.; Kert, M.; Youance, S.; Nollet, M.; and Chouinard, L.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263997 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {The use of Hazcan to assess the earthquake risk of residential buildings in Montreal, Canada.},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Rosset, P. and Kert, M. and Youance, S. and Nollet, M.-J. and Chouinard, L.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">Montreal is the second most vulnerable city for earthquakes, after Vancouver, considering the level of the seismic hazard level and the population. A study, supported by the Ministere de la Securite Publique du Quebec, has been conducted to assess the losses to residential buildings for several earthquake scenarios. Population and building data have been collected for each of the 3'201 dissemination areas forming the Montreal Island. Inventory of the buildings in terms of occupancy and construction types uses mainly the information for about 350'000 buildings available in the 2016 municipal property roll of Montreal. Wood-frame buildings counts for 79% of the total, masonry for 18%, steel frame and reinforced concrete sharing the last 3%. Ground motion prediction equations for Eastern North America are applied for the different seismic scenarios taking into account microzonation in terms of Vs30 derived soil classes. Depending on the scenario, damage ranges from 25 to 60% of the building stock, severely damaged and collapsed buildings representing 2 to 12% of the total. Non-structural damage accounts for 80% of the total losses. Generally, masonry houses built before the 20<sup>th</sup> century account for most of the damage as wood-frame structure perform best. The total losses vary between 1 and 12% of the portfolio for residential houses depending on the selected scenario. Preliminary estimates of the amount of debris generated by scenario earthquakes range from 0.6 to 6 million tons, with brick and wood debris representing approximately 60% of the total.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Reinforced concrete},\n%keywords = {Debris;Earthquakes;Equations of motion;Motion estimation;Population statistics;Risk assessment;Structural analysis;},\n%note = {Earthquake risk;Earthquake scenario;Frame buildings;Property;Residential building;Seismic hazards;Steel frame;Steel reinforced;Total loss;Wood frame;},\n} \n\n\n
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Montreal is the second most vulnerable city for earthquakes, after Vancouver, considering the level of the seismic hazard level and the population. A study, supported by the Ministere de la Securite Publique du Quebec, has been conducted to assess the losses to residential buildings for several earthquake scenarios. Population and building data have been collected for each of the 3'201 dissemination areas forming the Montreal Island. Inventory of the buildings in terms of occupancy and construction types uses mainly the information for about 350'000 buildings available in the 2016 municipal property roll of Montreal. Wood-frame buildings counts for 79% of the total, masonry for 18%, steel frame and reinforced concrete sharing the last 3%. Ground motion prediction equations for Eastern North America are applied for the different seismic scenarios taking into account microzonation in terms of Vs30 derived soil classes. Depending on the scenario, damage ranges from 25 to 60% of the building stock, severely damaged and collapsed buildings representing 2 to 12% of the total. Non-structural damage accounts for 80% of the total losses. Generally, masonry houses built before the 20th century account for most of the damage as wood-frame structure perform best. The total losses vary between 1 and 12% of the portfolio for residential houses depending on the selected scenario. Preliminary estimates of the amount of debris generated by scenario earthquakes range from 0.6 to 6 million tons, with brick and wood debris representing approximately 60% of the total.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Vibration-based system identification of a reinforced concrete shear wall using frequency domain methods.\n \n \n \n\n\n \n Roy, T.; Panigrahi, S.; Chourasia, A.; Tirca, L.; and Bagchi, A.\n\n\n \n\n\n\n In volume 2019-June, pages Design Engineering Division and Computers and Information in Engineering Division - , Laval, QC, Canada, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201008263850 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Vibration-based system identification of a reinforced concrete shear wall using frequency domain methods},\njournal = {Proceedings, Annual Conference - Canadian Society for Civil Engineering},\nauthor = {Roy, T.B. and Panigrahi, S.K. and Chourasia, A. and Tirca, L. and Bagchi, A.},\nvolume = {2019-June},\nyear = {2019},\npages = {Design Engineering Division and Computers and Information in Engineering Division - },\naddress = {Laval, QC, Canada},\nabstract = {<div data-language="eng" data-ev-field="abstract">In last few decades, vibration-based Structural Health Monitoring (SHM) has played a significant role to study different parameters of a structure. Frequency Domain Decomposition (FDD) plays important roles to identify system properties, such as: modal frequencies, mode shape and damping ratio. The focus of the present research is to identify modal frequencies of a scaled down RC shear wall in laboratory conditions using wired PCB Piezotronics sensor network. For signal decomposition, FDD has been utilized to get modal frequencies of the experimental shear wall using ambient vibration data. Detailed experimentation mechanisms are shown in the work. From the analysis results, different modal frequencies are obtained at different phase of the experiment. It is concluded that wired sensor network is very effective for vibration-based system identification, at the same time PSD with the FDD in combination with SVD can provide an important tool for estimation of modal frequencies and corresponding mod shapes from noisy vibration response.<br/></div> � 2019 Canadian Society for Civil Engineering. All rights reserved.},\nkey = {Structural health monitoring},\n%keywords = {Domain decomposition methods;Frequency domain analysis;Frequency estimation;Organic pollutants;Polychlorinated biphenyls;Reinforced concrete;Religious buildings;Sensor networks;Signal processing;},\n%note = {Frequency domain decomposition;Frequency-domain methods;Modal frequency;PCB piezotronic sensor;RC shear wall;Reinforced concrete shear walls;Sensors network;System-identification;Vibration;Vibration-based structural health monitoring;},\n} \n\n\n
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\n
In last few decades, vibration-based Structural Health Monitoring (SHM) has played a significant role to study different parameters of a structure. Frequency Domain Decomposition (FDD) plays important roles to identify system properties, such as: modal frequencies, mode shape and damping ratio. The focus of the present research is to identify modal frequencies of a scaled down RC shear wall in laboratory conditions using wired PCB Piezotronics sensor network. For signal decomposition, FDD has been utilized to get modal frequencies of the experimental shear wall using ambient vibration data. Detailed experimentation mechanisms are shown in the work. From the analysis results, different modal frequencies are obtained at different phase of the experiment. It is concluded that wired sensor network is very effective for vibration-based system identification, at the same time PSD with the FDD in combination with SVD can provide an important tool for estimation of modal frequencies and corresponding mod shapes from noisy vibration response.
� 2019 Canadian Society for Civil Engineering. All rights reserved.\n
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\n \n\n \n \n \n \n \n Ground response in the september 19th 2017 mw = 7.1 central mexico earthquake.\n \n \n \n\n\n \n Yniesta, S.\n\n\n \n\n\n\n In pages 5777 - 5783, Rome, Italy, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20201108281627 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Ground response in the september 19th 2017 mw = 7.1 central mexico earthquake},\njournal = {Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019},\nauthor = {Yniesta, S.},\nyear = {2019},\npages = {5777 - 5783},\naddress = {Rome, Italy},\nabstract = {Mexico City is mostly built on soft, high-plasticity lacustrine clay. The thickness of the clayey layer varies across the city and is one of the main contributors to ground motion amplification. On September 19<sup>th</sup> 2017 a M<inf>w</inf> 7.1 earthquake struck the central part of Mexico killing at least 370 people, injuring about 6,000 people and causing the collapse of at least 44 buildings in Mexico City, with most of the collapsed buildings being in the zone with a medium clay thickness. Ground motion recordings across the city indicated that this zone sustained greater acceleration, indicating local amplification. This paper studies the spatial distribution of maximum spectral acceleration and the period at which they are observed, to analyze ground motion amplification due to soft lacustrine clays. The amplification observed is explained by the combination of frequency content of the motion, motion intensity and fundamental site period.<br/> © 2019 Associazione Geotecnica Italiana, Rome, Italy.},\nkey = {Earthquakes},\n%keywords = {Geotechnical engineering;},\n%note = {Collapsed buildings;Frequency contents;Ground motion recording;Ground-motion amplification;High plasticity;Lacustrine clay;Motion intensity;Spectral acceleration;},\n} \n\n\n
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\n Mexico City is mostly built on soft, high-plasticity lacustrine clay. The thickness of the clayey layer varies across the city and is one of the main contributors to ground motion amplification. On September 19th 2017 a Mw 7.1 earthquake struck the central part of Mexico killing at least 370 people, injuring about 6,000 people and causing the collapse of at least 44 buildings in Mexico City, with most of the collapsed buildings being in the zone with a medium clay thickness. Ground motion recordings across the city indicated that this zone sustained greater acceleration, indicating local amplification. This paper studies the spatial distribution of maximum spectral acceleration and the period at which they are observed, to analyze ground motion amplification due to soft lacustrine clays. The amplification observed is explained by the combination of frequency content of the motion, motion intensity and fundamental site period.
© 2019 Associazione Geotecnica Italiana, Rome, Italy.\n
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\n \n\n \n \n \n \n \n \n Explicit collapse analysis of the morandi bridge using the applied element method.\n \n \n \n \n\n\n \n Malomo, D.; Pinho, R.; Scattarreggia, N.; Moratti, M.; and Calvi, G.\n\n\n \n\n\n\n In pages 111 - 120, New York, NY, United states, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"ExplicitPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20200708162385 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Explicit collapse analysis of the morandi bridge using the applied element method},\njournal = {Risk-based Bridge Engineering - 10th NewYork City Bridge Conference, 2019},\nauthor = {Malomo, D. and Pinho, R. and Scattarreggia, N. and Moratti, M. and Calvi, G.M.},\nyear = {2019},\npages = {111 - 120},\naddress = {New York, NY, United states},\nabstract = {Explicit collapse analysis of bridges still represents an open challenge in numerical modeling. In this work, an innovative micro-modeling approach, the Applied Element Method, is used to investigate potential triggering factors that might have contributed to the collapse of the Morandi Bridge, in Genoa, Italy, which took place on August 14, 2018. This paper explores the influence of several parameters, including deterioration of cables, and loading effects on the collapse mechanism. The observed and predicted debris were also compared to assess the possible collapse mechanism of the bridge.<br/> © 2019 Taylor & Francis Group, London, UK.},\nkey = {Deterioration},\n%keywords = {Structural design;Bridges;Maintenance;},\n%note = {Collapse analysis;Collapse mechanism;Element method;Loading effects;Micro models;Triggering factors;},\nURL = {http://dx.doi.org/10.1201/9780367815646-10},\n} \n\n\n
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\n Explicit collapse analysis of bridges still represents an open challenge in numerical modeling. In this work, an innovative micro-modeling approach, the Applied Element Method, is used to investigate potential triggering factors that might have contributed to the collapse of the Morandi Bridge, in Genoa, Italy, which took place on August 14, 2018. This paper explores the influence of several parameters, including deterioration of cables, and loading effects on the collapse mechanism. The observed and predicted debris were also compared to assess the possible collapse mechanism of the bridge.
© 2019 Taylor & Francis Group, London, UK.\n
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\n \n\n \n \n \n \n \n \n Modeling the local buckling failure of angle sections with beam elements.\n \n \n \n \n\n\n \n Pourshargh, F.; Legeron, F. P.; and Langlois, S.\n\n\n \n\n\n\n Advanced Steel Construction, 15(4): 364 - 376. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ModelingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20200207996557 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Modeling the local buckling failure of angle sections with beam elements},\njournal = {Advanced Steel Construction},\nauthor = {Pourshargh, Farshad and Legeron, Frederic P. and Langlois, Sebastien},\nvolume = {15},\nnumber = {4},\nyear = {2019},\npages = {364 - 376},\nissn = {1816112X},\nabstract = {Slender steel sections are widely used in the construction of steel structures such as lattice structures for transmission li ne and telecommunication towers. Local buckling may be the observed failure mode under compression loads for these slender sections, and many experimental studies have been conducted to evaluate their resistance. All steel design codes include equations to account for local buckling. In numerical models, local buckling can be reproduced using 2D shell or 3D elements. Nonlinear numerical models have been developed in the last decades that can capture the complex behavior of lattice structures up to failure. These models typically use beam elements that consider correctly the global buckling and yielding of sections but do not consider the local buckling of angles due to geometrical limitations. This article proposes a method that modifies the material behavior of sections to involve the local buckling failure in the analysis. Forty-two experimental tests were conducted on short angles and a general stress-strain formula was defined based on the test results. The formula relates the local buckling slenderness ratio of the members to a material constitutive law that accounts for the local buckling. To evaluate the method, the numerical results were compared to those of four x-braced frame configurations using slender angle sections. The results demonstrate that the proposed method can accurately model the local buckling failure of fiber beam elements.<br/> © 2019, Hong Kong Institute of Steel Construction. All rights reserved.},\nkey = {Numerical models},\n%keywords = {Steel structures;Steel fibers;Finite element method;Buckling;Numerical methods;Structural design;},\n%note = {Angle sections;Fiber beam elements;Lattice steels;Local buckling;Nonlinear behavior;},\nURL = {http://dx.doi.org/10.18057/IJASC.2019.15.4.7},\n} \n\n\n
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\n Slender steel sections are widely used in the construction of steel structures such as lattice structures for transmission li ne and telecommunication towers. Local buckling may be the observed failure mode under compression loads for these slender sections, and many experimental studies have been conducted to evaluate their resistance. All steel design codes include equations to account for local buckling. In numerical models, local buckling can be reproduced using 2D shell or 3D elements. Nonlinear numerical models have been developed in the last decades that can capture the complex behavior of lattice structures up to failure. These models typically use beam elements that consider correctly the global buckling and yielding of sections but do not consider the local buckling of angles due to geometrical limitations. This article proposes a method that modifies the material behavior of sections to involve the local buckling failure in the analysis. Forty-two experimental tests were conducted on short angles and a general stress-strain formula was defined based on the test results. The formula relates the local buckling slenderness ratio of the members to a material constitutive law that accounts for the local buckling. To evaluate the method, the numerical results were compared to those of four x-braced frame configurations using slender angle sections. The results demonstrate that the proposed method can accurately model the local buckling failure of fiber beam elements.
© 2019, Hong Kong Institute of Steel Construction. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Numerical analysis of pipeline response to slow landslides: Case study.\n \n \n \n \n\n\n \n Katebi, M.; Maghoul, P.; and Blatz, J.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 56(12): 1779 - 1788. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"NumericalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20194907789886 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Numerical analysis of pipeline response to slow landslides: Case study},\njournal = {Canadian Geotechnical Journal},\nauthor = {Katebi, Mohammad and Maghoul, Pooneh and Blatz, James},\nvolume = {56},\nnumber = {12},\nyear = {2019},\npages = {1779 - 1788},\nissn = {00083674},\nabstract = {A numerical analysis is carried out to study the behaviour of pipelines subjected to slow landslides at three at-risk landslide zones of Manitoba Pipeline Network. The pipeline’s longitudinal axis is parallel to the slow landslides at all three research sites. The ground displacements monitored for 5 years are imposed on the pipe using a special purpose pipe–soil interaction element (PSI element) using ABAQUS/Standard. The stiffness of PSI elements is defined based on soil–pipe interface properties according to a 2017 technical report from Pipeline Research Council International Inc. The results of the numerical analysis are compared with the instrumentation data to draw recommendations for future monitoring programs in slow landslide zones.<br/> © 2019, Canadian Science Publishing. All rights reserved.},\nkey = {Pipelines},\n%keywords = {Landslides;Numerical analysis;Risk assessment;},\n%note = {Ground displacement;Interface property;Longitudinal;Monitoring programs;Numerical;Pipeline networks;Pipeline research council internationals;Pipeline response;},\nURL = {http://dx.doi.org/10.1139/cgj-2018-0457},\n} \n\n\n
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\n A numerical analysis is carried out to study the behaviour of pipelines subjected to slow landslides at three at-risk landslide zones of Manitoba Pipeline Network. The pipeline’s longitudinal axis is parallel to the slow landslides at all three research sites. The ground displacements monitored for 5 years are imposed on the pipe using a special purpose pipe–soil interaction element (PSI element) using ABAQUS/Standard. The stiffness of PSI elements is defined based on soil–pipe interface properties according to a 2017 technical report from Pipeline Research Council International Inc. The results of the numerical analysis are compared with the instrumentation data to draw recommendations for future monitoring programs in slow landslide zones.
© 2019, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Behavior of epoxy bonded bars in concrete affected by alkali-silica reaction.\n \n \n \n \n\n\n \n Villemure, F.; Fiset, M.; Bastien, J.; Mitchell, D.; and Fournier, B.\n\n\n \n\n\n\n ACI Materials Journal, 116(6): 179 - 191. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"BehaviorPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20195007824933 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Behavior of epoxy bonded bars in concrete affected by alkali-silica reaction},\njournal = {ACI Materials Journal},\nauthor = {Villemure, Felix-Antoine and Fiset, Mathieu and Bastien, Josee and Mitchell, Denis and Fournier, Benoit},\nvolume = {116},\nnumber = {6},\nyear = {2019},\npages = {179 - 191},\nissn = {0889325X},\nabstract = {Installation of drilled-in epoxy-bonded reinforcing bars is generally an effective strengthening method to increase the flexural and shear capacities of deficient concrete structures. However, most of the available studies characterizing the bond behavior of epoxy bonded bars in concrete have been carried out on sound concrete elements-that is, without any pathological material damage. This raises the question of bond capacities in existing damaged elements. This study investigates the influence of alkali-silica reaction (ASR) on the capacity of post-installed reinforcing bars. ASR is a deleterious mechanism that causes expansion and cracking in the affected concrete elements. Pullout tests on post-installed reinforcing bars having embedded lengths of 2d<inf>b</inf>, 4d<inf>b</inf>, and 5d<inf>b</inf> with 15M reinforcing bars (d<inf>b</inf> = 15.9 mm [0.626 in.]) have demonstrated a drop-in bond strength when concrete is affected by ASR. In addition, the study revealed that the progression of concrete expansion due to ASR may lead to some confinement of the post-installed reinforcing bar and possibly increases the bond strength.<br/> © 2019 American Concrete Institute. All rights reserved.},\nkey = {Silica},\n%keywords = {Bars (metal);Bond strength (materials);},\n%note = {Alkali-silica reaction;Bonded reinforcing bars;Concrete elements;Concrete expansion;Material damages;Pull-out test;Shear capacity;Strengthening methods;},\nURL = {http://dx.doi.org/10.14359/51719069},\n} \n\n\n
\n
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\n Installation of drilled-in epoxy-bonded reinforcing bars is generally an effective strengthening method to increase the flexural and shear capacities of deficient concrete structures. However, most of the available studies characterizing the bond behavior of epoxy bonded bars in concrete have been carried out on sound concrete elements-that is, without any pathological material damage. This raises the question of bond capacities in existing damaged elements. This study investigates the influence of alkali-silica reaction (ASR) on the capacity of post-installed reinforcing bars. ASR is a deleterious mechanism that causes expansion and cracking in the affected concrete elements. Pullout tests on post-installed reinforcing bars having embedded lengths of 2db, 4db, and 5db with 15M reinforcing bars (db = 15.9 mm [0.626 in.]) have demonstrated a drop-in bond strength when concrete is affected by ASR. In addition, the study revealed that the progression of concrete expansion due to ASR may lead to some confinement of the post-installed reinforcing bar and possibly increases the bond strength.
© 2019 American Concrete Institute. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Monitoring concrete strength using strain energy based structural health monitoring technique: Hypothetical case study of a gravity dam.\n \n \n \n \n\n\n \n Bagchi, S.; Roy, T. B.; and Bagchi, A.\n\n\n \n\n\n\n In volume 1, pages 420 - 427, Stanford, CA, United states, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"MonitoringPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20194507631484 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Monitoring concrete strength using strain energy based structural health monitoring technique: Hypothetical case study of a gravity dam},\njournal = {Structural Health Monitoring 2019: Enabling Intelligent Life-Cycle Health Management for Industry Internet of Things (IIOT) - Proceedings of the 12th International Workshop on Structural Health Monitoring},\nauthor = {Bagchi, Saikat and Roy, Timir Baran and Bagchi, Ashutosh},\nvolume = {1},\nyear = {2019},\npages = {420 - 427},\naddress = {Stanford, CA, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">Identifying the variation in Modulus of Elasticity (MoE) of concrete is essential to comprehend the state of functionality of the concrete structural system. At different stages of service life, from construction to the demolition or restoration, the structure needs to be monitored so that any anomaly in the strength of the structure, whether due to strength gain, inappropriate construction or due to damage, can be identified readily. A very small deviation in the strength may need an appropriate and robust identification parameter to detect the anomaly. The current research article considers four modal parameters namely Eigenfiequency, Displacement Mode Shape (DMS), Curvature Mode Shape (CMS) and Strain Energy Mode Shape (SEMS) in order to comprehend the strength reduction. Vibration-based health monitoring technique is employed to the 2D numerical model of a concrete gravity dam known as Koyna dam, as a hypothetical case study. The model is validated through the two-step process using available data and random excitation. In this process, the simulated acceleration response of the structure is analyzed to extract modal information. Upon validation, the model is used to study the strength variation during its strength gaining phase and initial service life. Results show that although Eigen frequency, DMS and CMS can be sensitive to the large strength incongruity, none of them is suitable for identifying and representing the minute change in MoE, especially during the strength gaining phase of concrete. While on the other hand, SEMS is found to be sensitive enough to be able to differentiate between the very small variation in the governing strength parameter. Therefore, it is concluded that SEMS can represent the modal response of a concrete structure quite precisely at different times of its service life and can differentiate between the variation of Eigenfiequency due to a large amount of damage at a small location and a small strength variation in the overall structure. This property indicates that SEMS is the most appropriate parameter for identifying the system of a mass concrete structure like a gravity dam.<br/></div> © International Workshop on Structural Health Monitoring. All rights reserved.},\nkey = {Concretes},\n%keywords = {Concrete construction;Gravity dams;Life cycle;Modal analysis;Strain energy;Structural health monitoring;Concrete buildings;Gravitation;},\n%note = {2D numerical models;Acceleration response;Concrete gravity dams;Health monitoring technique;Robust identification;Strain energy mode shapes;Strength parameters;Strength reduction;},\nURL = {http://dx.doi.org/10.12783/shm2019/32143},\n} \n\n\n
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\n
Identifying the variation in Modulus of Elasticity (MoE) of concrete is essential to comprehend the state of functionality of the concrete structural system. At different stages of service life, from construction to the demolition or restoration, the structure needs to be monitored so that any anomaly in the strength of the structure, whether due to strength gain, inappropriate construction or due to damage, can be identified readily. A very small deviation in the strength may need an appropriate and robust identification parameter to detect the anomaly. The current research article considers four modal parameters namely Eigenfiequency, Displacement Mode Shape (DMS), Curvature Mode Shape (CMS) and Strain Energy Mode Shape (SEMS) in order to comprehend the strength reduction. Vibration-based health monitoring technique is employed to the 2D numerical model of a concrete gravity dam known as Koyna dam, as a hypothetical case study. The model is validated through the two-step process using available data and random excitation. In this process, the simulated acceleration response of the structure is analyzed to extract modal information. Upon validation, the model is used to study the strength variation during its strength gaining phase and initial service life. Results show that although Eigen frequency, DMS and CMS can be sensitive to the large strength incongruity, none of them is suitable for identifying and representing the minute change in MoE, especially during the strength gaining phase of concrete. While on the other hand, SEMS is found to be sensitive enough to be able to differentiate between the very small variation in the governing strength parameter. Therefore, it is concluded that SEMS can represent the modal response of a concrete structure quite precisely at different times of its service life and can differentiate between the variation of Eigenfiequency due to a large amount of damage at a small location and a small strength variation in the overall structure. This property indicates that SEMS is the most appropriate parameter for identifying the system of a mass concrete structure like a gravity dam.
© International Workshop on Structural Health Monitoring. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Enhancing the efficiency of structural condition assessment by integrating building information modeling (BIM) into vibration-based damage identification (VBDI).\n \n \n \n \n\n\n \n Bahmanoo, S.; Valinejadshoubi, M.; Sabamehr, A.; Bagchi, A.; and Bagchi, S.\n\n\n \n\n\n\n In volume 1, pages 412 - 419, Stanford, CA, United states, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"EnhancingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20194507631483 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Enhancing the efficiency of structural condition assessment by integrating building information modeling (BIM) into vibration-based damage identification (VBDI)},\njournal = {Structural Health Monitoring 2019: Enabling Intelligent Life-Cycle Health Management for Industry Internet of Things (IIOT) - Proceedings of the 12th International Workshop on Structural Health Monitoring},\nauthor = {Bahmanoo, Sam and Valinejadshoubi, Mojtaba and Sabamehr, Ardalan and Bagchi, Ashutosh and Bagchi, Saikat},\nvolume = {1},\nyear = {2019},\npages = {412 - 419},\naddress = {Stanford, CA, United states},\nabstract = {The essentiality of Vibration-Based Damage Identification (VBDI) in monitoring the health of civil engineering structures has been highly emphasized by a considerable amount of studies. The more precise a VBDI method would become, the more efficient the data management system would be essential to be devoted to it. However, due to neglecting the essential constitution of data management system, collecting accurate and reliable condition assessment information would be always a challenge, moreover; loss of data, misinterpretation or even corruption might be occurred. In this study in order to enhance the efficiency of structural condition assessment derived by VBDI process, Building Information Modeling (BIM) has been utilized to demonstrate the full potential of structural condition visualization thorough a graphical BIM user interface developed in Autodesk Revit software. According to the authors' knowledge, no comprehensive work was dedicated to vibration-based structural health monitoring through automated graphical BIM user interface. However, a lot of studies have been carried out on BIM integration and strain-based structural monitoring. In order to investigate the viability of the present study, a three story steel scaled structure adopted and studied at both pristine and damaged states. Initially, the captured sensor data was utilized in experimental modal analysis (System Identification) to obtain modal properties of the structure. After, applying a vibration-based damage detection technique to identify and localize the probable damages in the structure, Dynamo Studio, a visual programming tool, would be the link conveyor of the derived structural properties and Autodesk Revit to visualize the current conditions of the structural elements based on a predefined color-coding scheme. In conclusion, it can be expected that, utilizing BIM as a visual data management system could be essential to alert engineers and decision makers, the probable damage locations from the changes of vibration characteristics in civil engineering structures.<br/> © International Workshop on Structural Health Monitoring. All rights reserved.},\nkey = {Efficiency},\n%keywords = {Life cycle;Information management;Architectural design;Damage detection;Decision making;Internet of things;Modal analysis;Structural optimization;Computer programming;Structural health monitoring;},\n%note = {Building Information Model - BIM;Civil engineering structures;Data management system;Experimental modal analysis;Vibration based damage identifications;Vibration characteristics;Vibration-based damage detection;Vibration-based structural health monitoring;},\nURL = {http://dx.doi.org/10.12783/shm2019/32142},\n} \n\n\n
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\n The essentiality of Vibration-Based Damage Identification (VBDI) in monitoring the health of civil engineering structures has been highly emphasized by a considerable amount of studies. The more precise a VBDI method would become, the more efficient the data management system would be essential to be devoted to it. However, due to neglecting the essential constitution of data management system, collecting accurate and reliable condition assessment information would be always a challenge, moreover; loss of data, misinterpretation or even corruption might be occurred. In this study in order to enhance the efficiency of structural condition assessment derived by VBDI process, Building Information Modeling (BIM) has been utilized to demonstrate the full potential of structural condition visualization thorough a graphical BIM user interface developed in Autodesk Revit software. According to the authors' knowledge, no comprehensive work was dedicated to vibration-based structural health monitoring through automated graphical BIM user interface. However, a lot of studies have been carried out on BIM integration and strain-based structural monitoring. In order to investigate the viability of the present study, a three story steel scaled structure adopted and studied at both pristine and damaged states. Initially, the captured sensor data was utilized in experimental modal analysis (System Identification) to obtain modal properties of the structure. After, applying a vibration-based damage detection technique to identify and localize the probable damages in the structure, Dynamo Studio, a visual programming tool, would be the link conveyor of the derived structural properties and Autodesk Revit to visualize the current conditions of the structural elements based on a predefined color-coding scheme. In conclusion, it can be expected that, utilizing BIM as a visual data management system could be essential to alert engineers and decision makers, the probable damage locations from the changes of vibration characteristics in civil engineering structures.
© International Workshop on Structural Health Monitoring. All rights reserved.\n
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\n \n\n \n \n \n \n \n Flutter analysis using quasi-steady time-domain flutter derivatives.\n \n \n \n\n\n \n Maheux, S.; Langlois, S.; and Legeron, F.\n\n\n \n\n\n\n In pages 2665 - 2671, New York City, NY, United states, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20194507636416 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Flutter analysis using quasi-steady time-domain flutter derivatives},\njournal = {20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report},\nauthor = {Maheux, Sebastien and Langlois, Sebastien and Legeron, Frederic},\nyear = {2019},\npages = {2665 - 2671},\naddress = {New York City, NY, United states},\nabstract = {To be able to perform nonlinear flutter analyses for bridges, time‐domain approaches should be used instead of Scanlan's formulation of self‐excited forces. Thus, this paper addresses the development and validation of a modified quasi‐steady time‐domain model similar to Scanlan's approach that is based on the velocity and acceleration of the bridge deck. In this formulation, quasi‐steady time‐domain flutter derivatives measured in the wind tunnel through forced‐vibration tests at absolute constant velocity and acceleration are used. For this, a unique test rig, which can be used either for free‐ or forced‐vibration tests, was utilized. By measuring the time‐domain flutter derivatives of the Great Belt Bridge, their nondimensionalization with respect to the bridge‐deck width, velocity and acceleration of the deck is validated. Then, time‐domain flutter analyses are performed using this new model. They agree with the experimental critical speed and the prediction using Scanlan's model.<br/> © 20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report. All rights reserved.},\nkey = {Wind tunnels},\n%keywords = {Aeroelasticity;Flutter (aerodynamics);Vibration analysis;Time domain analysis;},\n%note = {Bridge aeroelasticities;Constant velocities;Domain approach;Flutter analysis;Flutter derivatives;Nondimensionalization;Nonlinear flutters;Vibration test;},\n} \n\n\n
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\n To be able to perform nonlinear flutter analyses for bridges, time‐domain approaches should be used instead of Scanlan's formulation of self‐excited forces. Thus, this paper addresses the development and validation of a modified quasi‐steady time‐domain model similar to Scanlan's approach that is based on the velocity and acceleration of the bridge deck. In this formulation, quasi‐steady time‐domain flutter derivatives measured in the wind tunnel through forced‐vibration tests at absolute constant velocity and acceleration are used. For this, a unique test rig, which can be used either for free‐ or forced‐vibration tests, was utilized. By measuring the time‐domain flutter derivatives of the Great Belt Bridge, their nondimensionalization with respect to the bridge‐deck width, velocity and acceleration of the deck is validated. Then, time‐domain flutter analyses are performed using this new model. They agree with the experimental critical speed and the prediction using Scanlan's model.
© 20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report. All rights reserved.\n
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\n \n\n \n \n \n \n \n Multi-story truss moment frames equipped with friction dampers and self-centering system for enhanced seismic performance.\n \n \n \n\n\n \n Tremblay, R.; and Faraji, K.\n\n\n \n\n\n\n In pages 1712 - 1719, New York City, NY, United states, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20194507636480 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Multi-story truss moment frames equipped with friction dampers and self-centering system for enhanced seismic performance},\njournal = {20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report},\nauthor = {Tremblay, Robert and Faraji, Keyhan},\nyear = {2019},\npages = {1712 - 1719},\naddress = {New York City, NY, United states},\nabstract = {In this article, two new truss moment frame (TMF) systems exhibiting enhanced seismic performance are examined: truss moment frames with friction energy dissipation dampers between the truss bottom chord and the columns (F-TMFs) and F-TMFs with tendons added to achieve self-centering response (FT-TMFs). In both cases, all steel components of the systems are expected to behave essentially elastically to eliminate structural damage. The second system is also expected to have negligible residual lateral deformations. To compare and investigate the seismic performance of the proposed TMF systems, a 5-story commercial steel building located in Vancouver, BC, is designed in accordance with the National Building Code of Canada 2015 (NBCC) and it is subjected to a series of nonlinear static and dynamic time history analyses. The earthquake records, employed in non-linear time history analyses, are scaled for a hazard level corresponding to a probability of 2% in 50 years. The analytical results show that structural damage does not occur in neither of the two proposed systems . Meanwhile, FT-TMF system showed notably better seismic response and negligible residual deformations due to its self-centering capacity provided by the tendons.<br/> © 20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report. All rights reserved.},\nkey = {Deformation},\n%keywords = {Seismic response;Seismic waves;Energy dissipation;Structural analysis;Time series analysis;Friction;Trusses;},\n%note = {Dynamic time history analysis;Friction damper;Friction energy dissipation;Moment frames;National Building Code of Canada;Residual deformation;Self centering;Self-centering system;},\n} \n\n\n
\n
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\n In this article, two new truss moment frame (TMF) systems exhibiting enhanced seismic performance are examined: truss moment frames with friction energy dissipation dampers between the truss bottom chord and the columns (F-TMFs) and F-TMFs with tendons added to achieve self-centering response (FT-TMFs). In both cases, all steel components of the systems are expected to behave essentially elastically to eliminate structural damage. The second system is also expected to have negligible residual lateral deformations. To compare and investigate the seismic performance of the proposed TMF systems, a 5-story commercial steel building located in Vancouver, BC, is designed in accordance with the National Building Code of Canada 2015 (NBCC) and it is subjected to a series of nonlinear static and dynamic time history analyses. The earthquake records, employed in non-linear time history analyses, are scaled for a hazard level corresponding to a probability of 2% in 50 years. The analytical results show that structural damage does not occur in neither of the two proposed systems . Meanwhile, FT-TMF system showed notably better seismic response and negligible residual deformations due to its self-centering capacity provided by the tendons.
© 20th Congress of IABSE, New York City 2019: The Evolving Metropolis - Report. All rights reserved.\n
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\n \n\n \n \n \n \n \n Shear strengthening of thick concrete slabs accounting for loading during strengthening.\n \n \n \n\n\n \n Frederic, B.; Mathieu, F.; Josee, B.; and Denis, M.\n\n\n \n\n\n\n In volume 1, Kingston upon Thames, United kingdom, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20193507360947 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Shear strengthening of thick concrete slabs accounting for loading during strengthening},\njournal = {Sustainable Construction Materials and Technologies},\nauthor = {Frederic, Bedard and Mathieu, Fiset and Josee, Bastien and Denis, Mitchell},\nvolume = {1},\nyear = {2019},\nissn = {25153048},\naddress = {Kingston upon Thames, United kingdom},\nabstract = {In order to investigate the effect of the service shear load at the time of strengthening a thick slab using bonded transverse reinforcing bars, an experimental study has been carried out. Five (5) beams representing slices of a thick slab were tested to induce different shear load levels in the beams at the time of strengthening then loaded up to shear failure. Tests were conducted on a slab without shear reinforcement and the others on slabs strengthened at two different load levels at the time of strengthening. The added shear reinforcement was distributed according to two different longitudinal spacings. The results show that, even in the presence of usual service loads, the shear strengthening of thick slabs with bonded bars offers a considerable increase in shear capacity compared to a thick slab without shear reinforcement.<br/> © 2019 International Committee of the SCMT conferences. All rights reserved.},\nkey = {Concrete slabs},\n%keywords = {Adhesives;Shear flow;Sustainable development;},\n%note = {Bonded reinforcement;Epoxy adhesives;Experimental test;Service loads;Shear strengthening;},\n} \n\n\n
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\n In order to investigate the effect of the service shear load at the time of strengthening a thick slab using bonded transverse reinforcing bars, an experimental study has been carried out. Five (5) beams representing slices of a thick slab were tested to induce different shear load levels in the beams at the time of strengthening then loaded up to shear failure. Tests were conducted on a slab without shear reinforcement and the others on slabs strengthened at two different load levels at the time of strengthening. The added shear reinforcement was distributed according to two different longitudinal spacings. The results show that, even in the presence of usual service loads, the shear strengthening of thick slabs with bonded bars offers a considerable increase in shear capacity compared to a thick slab without shear reinforcement.
© 2019 International Committee of the SCMT conferences. All rights reserved.\n
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\n \n\n \n \n \n \n \n Lateral stability and design of Gerber systems.\n \n \n \n\n\n \n Elmaraghy, A.; Silva, K.; Manaud, V.; and Boissonnade, N.\n\n\n \n\n\n\n In volume 2, pages 643 - 667, St. Louis, MO, United states, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20193407338469 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Lateral stability and design of Gerber systems},\njournal = {Structural Stability Research Council Annual Stability Conference 2019, SSRC 2019},\nauthor = {Elmaraghy, Amir and Silva, Kevin and Manaud, Valentin and Boissonnade, Nicolas},\nvolume = {2},\nyear = {2019},\npages = {643 - 667},\naddress = {St. Louis, MO, United states},\nabstract = {The present paper addresses the behaviour, resistance and design of steel beams with overhanging segments against Lateral Torsional Buckling - so-called Gerber systems. This system has been used extensively in North America for the roof girders of single story buildings - typically warehouses and commercial buildings. This system is quite rational and economic, and also requires simple fabrication and erection works. However, the design process deserves careful and specific attention with respect to (i) the L.T.B. check of the overhanging segment which cannot be assumed as a typical cantilever since the adjacent back-span cannot provide full fixity, (ii) the L.T.B. check of simply supported parts under realistic lateral restraints and (iii) the design of connections at vertical supports, namely with respect to bracing considerations. Research investigations aimed at understanding deeper the buckling behaviour of such systems, characterizing the key design parameters and developing an adequate design method were undertaken and are reported in the paper. Comprehensive F.E. studies on various major influences such as span ratios, lateral support conditions or the need for vertical stiffeners are detailed and analysed. Eventually, a devoted set of design rules and recommendations is proposed.<br/> © (2019) by the Structural Stability Research Council (SSRC) All rights reserved.},\nkey = {Design},\n%keywords = {Office buildings;Stability;Steel beams and girders;},\n%note = {Buckling behaviour;Commercial building;Key design parameters;Lateral restraint;Lateral stability;Lateral-torsional buckling;Support conditions;Vertical stiffeners;},\n} \n\n\n
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\n The present paper addresses the behaviour, resistance and design of steel beams with overhanging segments against Lateral Torsional Buckling - so-called Gerber systems. This system has been used extensively in North America for the roof girders of single story buildings - typically warehouses and commercial buildings. This system is quite rational and economic, and also requires simple fabrication and erection works. However, the design process deserves careful and specific attention with respect to (i) the L.T.B. check of the overhanging segment which cannot be assumed as a typical cantilever since the adjacent back-span cannot provide full fixity, (ii) the L.T.B. check of simply supported parts under realistic lateral restraints and (iii) the design of connections at vertical supports, namely with respect to bracing considerations. Research investigations aimed at understanding deeper the buckling behaviour of such systems, characterizing the key design parameters and developing an adequate design method were undertaken and are reported in the paper. Comprehensive F.E. studies on various major influences such as span ratios, lateral support conditions or the need for vertical stiffeners are detailed and analysed. Eventually, a devoted set of design rules and recommendations is proposed.
© (2019) by the Structural Stability Research Council (SSRC) All rights reserved.\n
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\n \n\n \n \n \n \n \n Stability of stainless steel sections under simple loading.\n \n \n \n\n\n \n Gagne, A.; Gerard, L.; and Boissonnade, N.\n\n\n \n\n\n\n In volume 2, pages 932 - 950, St. Louis, MO, United states, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20193407338485 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Stability of stainless steel sections under simple loading},\njournal = {Structural Stability Research Council Annual Stability Conference 2019, SSRC 2019},\nauthor = {Gagne, Anne-Sophie and Gerard, Lucile and Boissonnade, Nicolas},\nvolume = {2},\nyear = {2019},\npages = {932 - 950},\naddress = {St. Louis, MO, United states},\nabstract = {The present paper investigates the resistance of stainless steel open sections as influenced by local stability issues. In particular, the influence of a rounded stress-strain law with large strain hardening effects on the buckling response of sections is studied. Several structural stainless steel grades are considered, as well as various section shapes under either compression or major-axis bending moment. The interaction between yielding and buckling is seen to be strongly influenced by individual element stability. Eventually, suitable design equations are proposed.<br/> © (2019) by the Structural Stability Research Council (SSRC) All rights reserved.},\nkey = {Stability},\n%keywords = {Stainless steel;Buckling;Strain hardening;},\n%note = {Buckling response;Design equation;Large strains;Local stability;Simple loading;Stainless steel grades;Stainless steel sections;Stress-strain law;},\n} \n\n\n
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\n The present paper investigates the resistance of stainless steel open sections as influenced by local stability issues. In particular, the influence of a rounded stress-strain law with large strain hardening effects on the buckling response of sections is studied. Several structural stainless steel grades are considered, as well as various section shapes under either compression or major-axis bending moment. The interaction between yielding and buckling is seen to be strongly influenced by individual element stability. Eventually, suitable design equations are proposed.
© (2019) by the Structural Stability Research Council (SSRC) All rights reserved.\n
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\n \n\n \n \n \n \n \n The role of local buckling in the determination of H.S.S. Rotational capacity.\n \n \n \n\n\n \n Saloumi, E.; Hayeck, M.; Nseir, J.; and Boissonnade, N.\n\n\n \n\n\n\n In volume 2, pages 734 - 755, St. Louis, MO, United states, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20193407338474 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {The role of local buckling in the determination of H.S.S. Rotational capacity},\njournal = {Structural Stability Research Council Annual Stability Conference 2019, SSRC 2019},\nauthor = {Saloumi, Elsy and Hayeck, Marielle and Nseir, Joanna and Boissonnade, Nicolas},\nvolume = {2},\nyear = {2019},\npages = {734 - 755},\naddress = {St. Louis, MO, United states},\nabstract = {The present paper focuses on the rotational capacity of H.S.S. steel sections; in particular, the influence of local buckling is accounted for by means of a new generalized cross-sectional slenderness parameter, which is used to characterize the cross-sectional rotational capacity, and, by extension, the available deformation capacity. Careful shell modelling of hollow section beams in bending was used, the numerical models being previously carefully validated against more than 50 bending tests. Extensive F.E. studies were consecutively performed, including many parameters such as various material grades, load and support arrangements, length-to-height ratios, etc. Specific attention was paid to the introduction of initial geometrical (local) imperfections, as they were shown quite influential on the rotation capacity. The paper then analyses the numerical results and points out the various influences of height-to-width ratio, shear, moment gradient, yield stress and length-to-height ratio on the available rotational capacity. In a second step, the rotational capacity demand vs. stability criterion is detailed, and related to the proposed generalized cross-sectional slenderness, which is shown to be more appropriate than the b / t ratios usually proposed in design codes. Finally, code-ready recommendations for new ways of allowing for plastic analysis in practical design following the proposed approach are given.<br/> © (2019) by the Structural Stability Research Council (SSRC) All rights reserved.},\nkey = {Bending tests},\n%keywords = {Stability criteria;Yield stress;Buckling;},\n%note = {Deformation capacity;Hollow section beam;Material grades;Moment gradients;Numerical results;Plastic analysis;Rotation capacity;Rotational capacity;},\n} \n\n\n
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\n The present paper focuses on the rotational capacity of H.S.S. steel sections; in particular, the influence of local buckling is accounted for by means of a new generalized cross-sectional slenderness parameter, which is used to characterize the cross-sectional rotational capacity, and, by extension, the available deformation capacity. Careful shell modelling of hollow section beams in bending was used, the numerical models being previously carefully validated against more than 50 bending tests. Extensive F.E. studies were consecutively performed, including many parameters such as various material grades, load and support arrangements, length-to-height ratios, etc. Specific attention was paid to the introduction of initial geometrical (local) imperfections, as they were shown quite influential on the rotation capacity. The paper then analyses the numerical results and points out the various influences of height-to-width ratio, shear, moment gradient, yield stress and length-to-height ratio on the available rotational capacity. In a second step, the rotational capacity demand vs. stability criterion is detailed, and related to the proposed generalized cross-sectional slenderness, which is shown to be more appropriate than the b / t ratios usually proposed in design codes. Finally, code-ready recommendations for new ways of allowing for plastic analysis in practical design following the proposed approach are given.
© (2019) by the Structural Stability Research Council (SSRC) All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Study of the composite action of hollowcore panels used in girder-slab system.\n \n \n \n \n\n\n \n Roy, N.; Parent, S.; and Barriere, M.\n\n\n \n\n\n\n In pages American Concrete Institute; American Institute of Steel Construction; Architectural Institute of Japan; Japan Concrete Institute; Japan Society of Civil Engineers - , Chicago, IL, United states, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"StudyPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@inproceedings{20193307302933 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Study of the composite action of hollowcore panels used in girder-slab system},\njournal = {ISEC 2019 - 10th International Structural Engineering and Construction Conference},\nauthor = {Roy, Nathalie and Parent, Serge and Barriere, Melissa},\nyear = {2019},\npages = {American Concrete Institute; American Institute of Steel Construction; Architectural Institute of Japan; Japan Concrete Institute; Japan Society of Civil Engineers - },\naddress = {Chicago, IL, United states},\nabstract = {Floor construction with precast hollowcore panels produced by Lafarge Precast Edmonton results in a commonly used girder-slab system. Continuity between the elements is ensured by bent rebars and shear studs. Once all these elements are installed, a structural concrete is poured between the reinforced concrete panels and over the entire floor. The extent of composite action between the rigid diaphragm and the steel beams is not known. Therefore, its potential benefit is not taken into account in the current design procedures for the steel structure. The main components of this research project are the following: an experimental program consisting of a series of 6 large-scale shear tests were carried out. The outcome of this research shows that there is a potential for a composite action between a hollowcore plank and a standard hot rolled W shape. It was found that there is enough confinement to develop the steel stud strength when the beam is connected to the precast prestressed concrete panels using a 1/2" shear stud embedded between the planks and under two to three inches of concrete topping.<br/> Copyright © 2019 ISEC Press.},\nkey = {Floors},\n%keywords = {Reinforced concrete;Concrete slabs;Concrete buildings;Structural design;Concrete beams and girders;Software testing;Hot rolling;Precast concrete;Prestressed concrete;Studs (structural members);},\n%note = {Embedment;Floor systems;Nelson stud;Pre-cast;Push-out tests;Shear transfer;},\nURL = {http://dx.doi.org/10.14455/isec.res.2019.168},\n} \n\n\n
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\n Floor construction with precast hollowcore panels produced by Lafarge Precast Edmonton results in a commonly used girder-slab system. Continuity between the elements is ensured by bent rebars and shear studs. Once all these elements are installed, a structural concrete is poured between the reinforced concrete panels and over the entire floor. The extent of composite action between the rigid diaphragm and the steel beams is not known. Therefore, its potential benefit is not taken into account in the current design procedures for the steel structure. The main components of this research project are the following: an experimental program consisting of a series of 6 large-scale shear tests were carried out. The outcome of this research shows that there is a potential for a composite action between a hollowcore plank and a standard hot rolled W shape. It was found that there is enough confinement to develop the steel stud strength when the beam is connected to the precast prestressed concrete panels using a 1/2\" shear stud embedded between the planks and under two to three inches of concrete topping.
Copyright © 2019 ISEC Press.\n
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\n \n\n \n \n \n \n \n \n Characterization of the hot anode paste compaction process: A computational and experimental study.\n \n \n \n \n\n\n \n Chaouki, H.; Thibodeau, S.; Fafard, M.; Ziegler, D.; and Alamdari, H.\n\n\n \n\n\n\n Materials, 12(5). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"CharacterizationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20193107261280 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Characterization of the hot anode paste compaction process: A computational and experimental study},\njournal = {Materials},\nauthor = {Chaouki, Hicham and Thibodeau, Stephane and Fafard, Mario and Ziegler, Donald and Alamdari, Houshang},\nvolume = {12},\nnumber = {5},\nyear = {2019},\nissn = {19961944},\nabstract = {The aim of this work is to model and characterize green anode paste compaction behavior. For this purpose, a nonlinear viscoplastic constitutive law for compressible materials, based on the finite strain theory and the thermodynamic framework, was used. An experimental study was carried out to characterize axial and radial behaviors of the anode paste. To this end, simple compaction tests using a thin steel instrumented mold were performed at a temperature of 150 °C. Results of these experiments brought out the nonlinear mechanical behavior of the anode paste. Furthermore, they showed the importance of its radial behavior. The constitutive law was implemented in Abaqus software through the user's material subroutine VUMAT for explicit dynamic analysis. An inverse analysis procedure for material parameters identification showed that the model predicts compaction tests results with a good agreement. In order to assess the constitutive law predictive potential in situations involving density gradients, compaction tests using complex geometries such as slots and stub holes were carried out. Finite element simulation results showed the ability of the model to successfully predict density profiles measured by the X-ray tomography.<br/> © 2019 by the authors.},\nkey = {Finite element method},\n%keywords = {ABAQUS;Tomography;Compaction;Subroutines;Anodes;Computation theory;},\n%note = {Compaction behavior;Compaction test;Compressible material;Constitutive law;Finite element simulations;Green anodes;Thermodynamic framework;X-ray tomography;},\nURL = {http://dx.doi.org/10.3390/MA12050800},\n} \n\n\n
\n
\n\n\n
\n The aim of this work is to model and characterize green anode paste compaction behavior. For this purpose, a nonlinear viscoplastic constitutive law for compressible materials, based on the finite strain theory and the thermodynamic framework, was used. An experimental study was carried out to characterize axial and radial behaviors of the anode paste. To this end, simple compaction tests using a thin steel instrumented mold were performed at a temperature of 150 °C. Results of these experiments brought out the nonlinear mechanical behavior of the anode paste. Furthermore, they showed the importance of its radial behavior. The constitutive law was implemented in Abaqus software through the user's material subroutine VUMAT for explicit dynamic analysis. An inverse analysis procedure for material parameters identification showed that the model predicts compaction tests results with a good agreement. In order to assess the constitutive law predictive potential in situations involving density gradients, compaction tests using complex geometries such as slots and stub holes were carried out. Finite element simulation results showed the ability of the model to successfully predict density profiles measured by the X-ray tomography.
© 2019 by the authors.\n
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\n \n\n \n \n \n \n \n Design criteria of wireless sensors in structural health monitoring systems.\n \n \n \n\n\n \n Zakikhani, S.; Bagchi, A.; and Hammad, A.\n\n\n \n\n\n\n In pages AceCad Software; Acumen; Autodesk, Inc.; SOFiSTiK AG; Tekla International - , Nottingham, United kingdom, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20193107250781 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Design criteria of wireless sensors in structural health monitoring systems},\njournal = {EG-ICE 2010 - 17th International Workshop on Intelligent Computing in Engineering},\nauthor = {Zakikhani, Sepideh and Bagchi, Ashutosh and Hammad, Amin},\nyear = {2019},\npages = {AceCad Software; Acumen; Autodesk, Inc.; SOFiSTiK AG; Tekla International - },\naddress = {Nottingham, United kingdom},\nabstract = {In order to reduce the probability of failure of infrastructure, the concept of Structural Health Monitoring (SHM) has been introduced. SHM applications help specialists detect the anomalies in the performance of infrastructure in order to take preventive actions based on damage detection techniques before any severe incident happens. In SHM, different types of sensors are used to detect the changes in the performance of structures. The use of wireless sensors has many advantages over wired sensors such as the lack of necessity of long cables and the lower maintenance cost; however the initial cost of wireless sensors and the need to change their batteries could be an issue. The application of wireless sensors in SHM is relatively new and there is no available guideline for applying Wireless Sensor Network (WSN) in SHM. This paper aims to investigate design the criteria of WSN in SHM and the importance of each criterion in the process of decision making for network design. A test has been presented to test the above mentioned criteria for the purpose of damage detection.<br/> © Nottingham University Press},\nkey = {Structural health monitoring},\n%keywords = {Decision making;Wireless sensor networks;Damage detection;},\n%note = {Damage detection technique;Design criteria;Health monitoring;Lower maintenance costs;Probability of failure;Structural health monitoring (SHM);Structural health monitoring systems;Wireless sensor;},\n} \n\n\n
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\n In order to reduce the probability of failure of infrastructure, the concept of Structural Health Monitoring (SHM) has been introduced. SHM applications help specialists detect the anomalies in the performance of infrastructure in order to take preventive actions based on damage detection techniques before any severe incident happens. In SHM, different types of sensors are used to detect the changes in the performance of structures. The use of wireless sensors has many advantages over wired sensors such as the lack of necessity of long cables and the lower maintenance cost; however the initial cost of wireless sensors and the need to change their batteries could be an issue. The application of wireless sensors in SHM is relatively new and there is no available guideline for applying Wireless Sensor Network (WSN) in SHM. This paper aims to investigate design the criteria of WSN in SHM and the importance of each criterion in the process of decision making for network design. A test has been presented to test the above mentioned criteria for the purpose of damage detection.
© Nottingham University Press\n
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\n \n\n \n \n \n \n \n \n Canada’s Contributions to the SWOT Mission–Terrestrial Hydrology(SWOT-C TH).\n \n \n \n \n\n\n \n Pietroniro, A.; Peters, D. L.; Yang, D.; Fiset, J.; Saint-Jean, R.; Fortin, V.; Leconte, R.; Bergeron, J.; Llanet Siles, G.; Trudel, M.; Garnaud, C.; Matte, P.; Smith, L. C.; Gleason, C. J.; and Pavelsky, T. M.\n\n\n \n\n\n\n Canadian Journal of Remote Sensing, 45(2): 116 - 138. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Canada’sPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192807172653 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Canada’s Contributions to the SWOT Mission–Terrestrial Hydrology(SWOT-C TH)},\njournal = {Canadian Journal of Remote Sensing},\nauthor = {Pietroniro, Alain and Peters, Daniel L. and Yang, Daqing and Fiset, Jean-Michel and Saint-Jean, Robert and Fortin, Vincent and Leconte, Robert and Bergeron, Jean and Llanet Siles, Gabriela and Trudel, Melanie and Garnaud, Camille and Matte, Pascal and Smith, Laurence C. and Gleason, Colin J. and Pavelsky, Tamlin M.},\nvolume = {45},\nnumber = {2},\nyear = {2019},\npages = {116 - 138},\nissn = {07038992},\nabstract = {The origins of the Surface Water and Ocean Topography (SWOT) mission date back to the mid-1970s with the launch of GOES-3 and SEASAT. These missions were then followed in 1992 by the Topex-Poseidon satellite, then by Jason-1 (2001), OSTM/Jason-2 (2008), and Jason 3 (2016), a series of joint satellite missions between NASA and CNES with a goal to monitor global ocean circulation. The proposed new SWOT mission will provide 120-km-wide swath interferometric coverage with a 20-km-wide gap at the nadir. The SWOT measurements will consist of water surface elevations and water surface slopes covering nearly all of the earth’s land surface at least once every 21 days. In 2010, NASA invited the Canadian Space Agency to contribute, and Canadian scientists welcomed the invitation to join the SWOT Science Definition Team and contribute to the experiments. The Canadian segment of the mission is known as the "SWOT-C" project. The SWOT satellite mission will provide unique opportunities in the Canadian context for water managers in both the public domain and in the private sector. This paper provides an overview of recent scientific progress by the SWOT-C Terrestrial Hydrology team, outlining current plans and progress towards applications and calibration post-launch.<br/> ©, © 2019 Copyright of the Crown in Canada. National Hydrological Service.},\nkey = {Surface waters},\n%keywords = {Topography;Geodetic satellites;Hydrology;NASA;Oceanography;},\n%note = {Canadian Space Agency;Global ocean circulation;Ocean topography;Private sectors;Satellite mission;Scientific progress;Water managers;Water surface elevations;},\nURL = {http://dx.doi.org/10.1080/07038992.2019.1581056},\n} \n\n\n
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\n The origins of the Surface Water and Ocean Topography (SWOT) mission date back to the mid-1970s with the launch of GOES-3 and SEASAT. These missions were then followed in 1992 by the Topex-Poseidon satellite, then by Jason-1 (2001), OSTM/Jason-2 (2008), and Jason 3 (2016), a series of joint satellite missions between NASA and CNES with a goal to monitor global ocean circulation. The proposed new SWOT mission will provide 120-km-wide swath interferometric coverage with a 20-km-wide gap at the nadir. The SWOT measurements will consist of water surface elevations and water surface slopes covering nearly all of the earth’s land surface at least once every 21 days. In 2010, NASA invited the Canadian Space Agency to contribute, and Canadian scientists welcomed the invitation to join the SWOT Science Definition Team and contribute to the experiments. The Canadian segment of the mission is known as the \"SWOT-C\" project. The SWOT satellite mission will provide unique opportunities in the Canadian context for water managers in both the public domain and in the private sector. This paper provides an overview of recent scientific progress by the SWOT-C Terrestrial Hydrology team, outlining current plans and progress towards applications and calibration post-launch.
©, © 2019 Copyright of the Crown in Canada. National Hydrological Service.\n
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\n \n\n \n \n \n \n \n \n Comparing properties of concrete containing electric arc furnace slag and granulated blast furnace slag.\n \n \n \n \n\n\n \n Lee, J.; Choi, J.; Yuan, T.; Yoon, Y.; and Mitchell, D.\n\n\n \n\n\n\n Materials, 12(9). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ComparingPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192106947233 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Comparing properties of concrete containing electric arc furnace slag and granulated blast furnace slag},\njournal = {Materials},\nauthor = {Lee, Jin-Young and Choi, Jin-Seok and Yuan, Tian-Feng and Yoon, Young-Soo and Mitchell, Denis},\nvolume = {12},\nnumber = {9},\nyear = {2019},\nissn = {19961944},\nabstract = {For sustainable development in the construction industry, blast furnace slag has been used as a substitute for cement in concrete. In contrast, steel-making slag, the second largest by-product in the steel industry, is mostly used as a filler material in embankment construction. This is because steel-making slag has relatively low hydraulicity and a problem with volumetric expansion. However, as the quenching process of slag has improved recently and the steel making process is specifically separated, the properties of steel-making slag has also improved. In this context, there is a need to find a method for recycling steel-making slag as a more highly valued material, such as its potential use as an admixture in concrete. Therefore, in order to confirm the possibility of using electric arc furnace (EAF) oxidizing slag as a binder, a comparative assessment of the mechanical properties of concrete containing electric arc furnace oxidizing slag, steel-making slag, and granulated blast furnace (GBF) slag was performed. The initial and final setting, shrinkage, compressive and split-cylinder tensile strength of the slag concretes were measured. It was found that replacing cement with EAF oxidizing slag delayed the hydration reaction at early ages, with no significant problems in setting time, shrinkage or strength development found.<br/> © 2019 by the authors.},\nkey = {Compressive strength},\n%keywords = {Electric arcs;Electric furnaces;Setting;Construction industry;Blast furnaces;Electric furnace process;Tensile strength;Cements;Concrete additives;Shrinkage;Concrete mixtures;Slags;},\n%note = {Comparative assessment;Electric arc furnace;Electric arc furnace slags;Embankment construction;Granulated blast furnace;Granulated blast furnace slag;Properties of concretes;Volumetric expansion;},\nURL = {http://dx.doi.org/10.3390/ma12091371},\n} \n\n\n
\n
\n\n\n
\n For sustainable development in the construction industry, blast furnace slag has been used as a substitute for cement in concrete. In contrast, steel-making slag, the second largest by-product in the steel industry, is mostly used as a filler material in embankment construction. This is because steel-making slag has relatively low hydraulicity and a problem with volumetric expansion. However, as the quenching process of slag has improved recently and the steel making process is specifically separated, the properties of steel-making slag has also improved. In this context, there is a need to find a method for recycling steel-making slag as a more highly valued material, such as its potential use as an admixture in concrete. Therefore, in order to confirm the possibility of using electric arc furnace (EAF) oxidizing slag as a binder, a comparative assessment of the mechanical properties of concrete containing electric arc furnace oxidizing slag, steel-making slag, and granulated blast furnace (GBF) slag was performed. The initial and final setting, shrinkage, compressive and split-cylinder tensile strength of the slag concretes were measured. It was found that replacing cement with EAF oxidizing slag delayed the hydration reaction at early ages, with no significant problems in setting time, shrinkage or strength development found.
© 2019 by the authors.\n
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\n \n\n \n \n \n \n \n \n Elastic-Plastic Analysis of Bolted Angles Usable in Steel Frame Connections.\n \n \n \n \n\n\n \n Davaran, A.; Beland, T.; and Tremblay, R.\n\n\n \n\n\n\n Journal of Structural Engineering (United States), 145(7). 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Elastic-PlasticPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20192006933982 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Elastic-Plastic Analysis of Bolted Angles Usable in Steel Frame Connections},\njournal = {Journal of Structural Engineering (United States)},\nauthor = {Davaran, Ali and Beland, Thierry and Tremblay, Robert},\nvolume = {145},\nnumber = {7},\nyear = {2019},\nissn = {07339445},\nabstract = {An analytical model was proposed to predict the monotonic load-deformation behavior of bolted angles used in semirigid steel frame connections. This model was validated using the results of 30 pull tests performed on bolted angle specimens with 10 different geometrical configurations. The model employed elastic-plastic analysis to follow the behavior upon formation of up to four plastic hinges involved in the entire yielding mechanism. The presented model is capable of handling slip in the column-leg bolts, which occurs when the developed shear force exceeds the frictional resistance. It was shown that the inclusion of slip in the column leg affects the elastic-plastic response, especially for stocky angles, and should be taken into account. The method also included strain hardening and geometrical nonlinearity (truss action). The ultimate deformation of the angle at fracture was also predicted through the kinematics of the mechanism using the ultimate strain criteria. The comparison of the test and analytical results showed the proposed method provides a reasonable backbone curve for the angle behavior, which is usable to make nonlinear spring element models for semirigid connections composed of flange angles.<br/> © 2019 American Society of Civil Engineers.},\nkey = {Strain hardening},\n%keywords = {Steel structures;Elastoplasticity;Structural frames;Bolts;Deformation;Steel construction;Friction;},\n%note = {Elastic-plastic analysis;Elastic-plastic response;Frictional resistance;Geometrical configurations;Geometrical non-linearity;Semi-rigid steel frames;Semirigid connections;Slip critical;},\nURL = {http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002320},\n} \n\n\n
\n
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\n An analytical model was proposed to predict the monotonic load-deformation behavior of bolted angles used in semirigid steel frame connections. This model was validated using the results of 30 pull tests performed on bolted angle specimens with 10 different geometrical configurations. The model employed elastic-plastic analysis to follow the behavior upon formation of up to four plastic hinges involved in the entire yielding mechanism. The presented model is capable of handling slip in the column-leg bolts, which occurs when the developed shear force exceeds the frictional resistance. It was shown that the inclusion of slip in the column leg affects the elastic-plastic response, especially for stocky angles, and should be taken into account. The method also included strain hardening and geometrical nonlinearity (truss action). The ultimate deformation of the angle at fracture was also predicted through the kinematics of the mechanism using the ultimate strain criteria. The comparison of the test and analytical results showed the proposed method provides a reasonable backbone curve for the angle behavior, which is usable to make nonlinear spring element models for semirigid connections composed of flange angles.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Finite element analysis of a cylindrical cathode collector bars design.\n \n \n \n \n\n\n \n Lacroix, O.; Beeler, R.; Chaouki, H.; Gosselin, L.; and Fafard, M.\n\n\n \n\n\n\n In pages 637 - 644, San Antonio, TX, United states, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"FinitePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20191806854025 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Finite element analysis of a cylindrical cathode collector bars design},\njournal = {Minerals, Metals and Materials Series},\nauthor = {Lacroix, Olivier and Beeler, Richard and Chaouki, Hicham and Gosselin, Louis and Fafard, Mario},\nyear = {2019},\npages = {637 - 644},\nissn = {23671181},\naddress = {San Antonio, TX, United states},\nabstract = {A new cathode design is investigated using the finite element method, in an attempt to improve the energy efficiency of a cell and reduce the premature wear of the cathode due to a non-uniform current distribution. This new design relies on cylindrical collector bars including copper inserts and eliminates the need of a cast iron interface in order to improve contact between the carbon blocks and the collector bars. The thermo-electro-mechanical model developed includes contact interfaces to simulate the contact between the different materials and is employed to determine the optimal configuration. Various geometry and design parameters are explored and their effect on both voltage drop and current distribution are highlighted. Simulation results indicate that a substantial voltage drop reduction and more uniform current distribution could be achieved.<br/> © 2019, The Minerals, Metals & Materials Society.},\nkey = {Cathodes},\n%keywords = {Finite element method;Energy efficiency;Cast iron;Electric current distribution measurement;},\n%note = {Cathode collector bars;Cathode design;Contact interface;Current distribution;Design parameters;Electromechanical models;Nonuniform current distributions;Uniform current distribution;},\nURL = {http://dx.doi.org/10.1007/978-3-030-05864-7_78},\n} \n\n\n
\n
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\n A new cathode design is investigated using the finite element method, in an attempt to improve the energy efficiency of a cell and reduce the premature wear of the cathode due to a non-uniform current distribution. This new design relies on cylindrical collector bars including copper inserts and eliminates the need of a cast iron interface in order to improve contact between the carbon blocks and the collector bars. The thermo-electro-mechanical model developed includes contact interfaces to simulate the contact between the different materials and is employed to determine the optimal configuration. Various geometry and design parameters are explored and their effect on both voltage drop and current distribution are highlighted. Simulation results indicate that a substantial voltage drop reduction and more uniform current distribution could be achieved.
© 2019, The Minerals, Metals & Materials Society.\n
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\n \n\n \n \n \n \n \n \n In situ evolution of the frozen layer under cold anode.\n \n \n \n \n\n\n \n Picard, D.; Tessier, J.; Gauthier, D.; Alamdari, H.; and Fafard, M.\n\n\n \n\n\n\n In pages 795 - 802, San Antonio, TX, United states, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"InPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20191806853448 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {In situ evolution of the frozen layer under cold anode},\njournal = {Minerals, Metals and Materials Series},\nauthor = {Picard, Donald and Tessier, Jayson and Gauthier, Dany and Alamdari, Houshang and Fafard, Mario},\nyear = {2019},\npages = {795 - 802},\nissn = {23671181},\naddress = {San Antonio, TX, United states},\nabstract = {Hall-Héroult electrolysis cell based on prebaked anode technology is continuously disturbed by anode change operations. Insertion of a cold anode in a cell will freeze a layer of molten cryolite under it and thus greatly affects, among others, the thermal balance and electrical distribution. To better understand the evolution of the frozen layer and its impact on the cell performance an experimental campaign has been performed on sixteen anodes having between 15 min and 6 h of operation. The selected anodes were instrumented to keep track of the temperature and voltage drop evolutions while the frozen layer thicknesses were estimated by image analysis after the anodes were removed from the cell after the designated time. Results show that the frozen layer completely disappeared after three hours of operation and before the anode reaches a thermoelectrically steady state.<br/> © 2019, The Minerals, Metals & Materials Society.},\nkey = {Anodes},\n%keywords = {Cytology;Cells;},\n%note = {Cell performance;Change operations;Cryolite;Electrical distribution;Electrolysis cell;Experimental;Experimental campaign;Frozen layer;},\nURL = {http://dx.doi.org/10.1007/978-3-030-05864-7_97},\n} \n\n\n
\n
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\n Hall-Héroult electrolysis cell based on prebaked anode technology is continuously disturbed by anode change operations. Insertion of a cold anode in a cell will freeze a layer of molten cryolite under it and thus greatly affects, among others, the thermal balance and electrical distribution. To better understand the evolution of the frozen layer and its impact on the cell performance an experimental campaign has been performed on sixteen anodes having between 15 min and 6 h of operation. The selected anodes were instrumented to keep track of the temperature and voltage drop evolutions while the frozen layer thicknesses were estimated by image analysis after the anodes were removed from the cell after the designated time. Results show that the frozen layer completely disappeared after three hours of operation and before the anode reaches a thermoelectrically steady state.
© 2019, The Minerals, Metals & Materials Society.\n
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\n \n\n \n \n \n \n \n \n Development of a drag probe for in situ velocity measurement of molten aluminum in electrolysis cell.\n \n \n \n \n\n\n \n Poursaman, S.; Baiteche, M.; Picard, D.; Ziegler, D.; Gosselin, L.; and Fafard, M.\n\n\n \n\n\n\n In pages 817 - 825, San Antonio, TX, United states, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"DevelopmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20191806854151 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Development of a drag probe for in situ velocity measurement of molten aluminum in electrolysis cell},\njournal = {Minerals, Metals and Materials Series},\nauthor = {Poursaman, Samaneh and Baiteche, Mounir and Picard, Donald and Ziegler, Donald and Gosselin, Louis and Fafard, Mario},\nyear = {2019},\npages = {817 - 825},\nissn = {23671181},\naddress = {San Antonio, TX, United states},\nabstract = {Fluid flow hydrodynamics in the aluminum electrolysis cell has been studied through numerical simulations for decades. However, there is little to no available experimental data to validate velocity profiles obtained from these numerical simulations. Velocity measurements inside the electrolysis cell is difficult in practice, due to being chemically aggressive, opaque and at high temperature. A new attempt is undertaken to measure molten aluminum velocity with a drag probe inspired from a proven device first used in wind velocity measurement. The new device is designed to minimize vortex shedding, to increase the drag coefficient and to be applicable in a harsh environment. This paper presents the probe adapted for the electrolysis cell, its calibration and validation method in a water channel at room temperature, and some results obtained in electrolysis cell.<br/> © 2019, The Minerals, Metals & Materials Society.},\nkey = {Velocity measurement},\n%keywords = {Cells;Flow of fluids;Cytology;Velocimeters;Velocity;Probes;Aluminum;Drag;Electrolytic cells;Electrolysis;Numerical models;},\n%note = {Aluminum electrolysis cell;Calibration and validations;Electrolysis cell;Harsh environment;High temperature;Molten aluminum;Velocity profiles;Wind velocity measurement;},\nURL = {http://dx.doi.org/10.1007/978-3-030-05864-7_100},\n} \n\n\n
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\n Fluid flow hydrodynamics in the aluminum electrolysis cell has been studied through numerical simulations for decades. However, there is little to no available experimental data to validate velocity profiles obtained from these numerical simulations. Velocity measurements inside the electrolysis cell is difficult in practice, due to being chemically aggressive, opaque and at high temperature. A new attempt is undertaken to measure molten aluminum velocity with a drag probe inspired from a proven device first used in wind velocity measurement. The new device is designed to minimize vortex shedding, to increase the drag coefficient and to be applicable in a harsh environment. This paper presents the probe adapted for the electrolysis cell, its calibration and validation method in a water channel at room temperature, and some results obtained in electrolysis cell.
© 2019, The Minerals, Metals & Materials Society.\n
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\n \n\n \n \n \n \n \n \n Soffit and U-Wrap fabric-reinforced cementitious matrix strengthening for reinforced concrete beams.\n \n \n \n \n\n\n \n Ebead, U.; El Refai, A.; Shrestha, K.; and Nanni, A.\n\n\n \n\n\n\n ACI Structural Journal, 116(2): 267 - 278. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"SoffitPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191106618024 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Soffit and U-Wrap fabric-reinforced cementitious matrix strengthening for reinforced concrete beams},\njournal = {ACI Structural Journal},\nauthor = {Ebead, Usama and El Refai, Ahmed and Shrestha, Kshitij and Nanni, Antonio},\nvolume = {116},\nnumber = {2},\nyear = {2019},\npages = {267 - 278},\nissn = {08893241},\nabstract = {The structural performance of reinforced concrete (RC) beams strengthened with fabric-reinforced cementitious matrix (FRCM) was investigated. Fourteen unstrengthened and strengthened beams were tested in flexure under four-point load configuration. Test parameters included the internal reinforcement ratios (0.5% representing flexure-deficient beams and 0.72 or 1.27% representing typical under-reinforced beams), the type of FRCM fabric (carbon and polyparaphenylene benzobisoxazole [PBO]), the number of fabric plies (one and two plies), and the strengthening scheme (straight at soffit or U-wrap). Test results revealed that the gain in flexural strength was inversely proportional to the internal reinforcement ratio of the beams regardless of the fabric type, scheme, or number of plies used. U-wrap strengthening scheme provided an inherent anchorage that limited the premature delamination of the fabric, which was a common mode of failure in the soffit-strengthening scheme. Beams strengthened with U-wrap single-ply of carbon- and PBO-FRCM showed an average gain in strength of 70% and 51%, respectively, compared to 28% and 20% for their counterparts strengthened with the soffit scheme. Moreover, the use of U-wrap double-ply of PBO fabric resulted in an average gain in strength of 72%. The theoretical formulations of ACI 549 satisfactorily predicted the load-carrying capacities of the soffit and U-wrap strengthened beams with an average ratio of P<inf>u</inf>/P<inf>u</inf><sup>Th</sup> of 1.07 and a standard deviation of 11%.<br/> Copyright © 2019, American Concrete Institute. All rights reserved.},\nkey = {Repair},\n%keywords = {Matrix algebra;Reinforced concrete;Carbon;Concrete beams and girders;},\n%note = {Cementitious materials;Cementitious matrices;Flexure;Reinforced concrete beams;Reinforcement ratios;Standard deviation;Structural performance;Theoretical formulation;},\nURL = {http://dx.doi.org/10.14359/51713292},\n} \n\n\n
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\n The structural performance of reinforced concrete (RC) beams strengthened with fabric-reinforced cementitious matrix (FRCM) was investigated. Fourteen unstrengthened and strengthened beams were tested in flexure under four-point load configuration. Test parameters included the internal reinforcement ratios (0.5% representing flexure-deficient beams and 0.72 or 1.27% representing typical under-reinforced beams), the type of FRCM fabric (carbon and polyparaphenylene benzobisoxazole [PBO]), the number of fabric plies (one and two plies), and the strengthening scheme (straight at soffit or U-wrap). Test results revealed that the gain in flexural strength was inversely proportional to the internal reinforcement ratio of the beams regardless of the fabric type, scheme, or number of plies used. U-wrap strengthening scheme provided an inherent anchorage that limited the premature delamination of the fabric, which was a common mode of failure in the soffit-strengthening scheme. Beams strengthened with U-wrap single-ply of carbon- and PBO-FRCM showed an average gain in strength of 70% and 51%, respectively, compared to 28% and 20% for their counterparts strengthened with the soffit scheme. Moreover, the use of U-wrap double-ply of PBO fabric resulted in an average gain in strength of 72%. The theoretical formulations of ACI 549 satisfactorily predicted the load-carrying capacities of the soffit and U-wrap strengthened beams with an average ratio of Pu/PuTh of 1.07 and a standard deviation of 11%.
Copyright © 2019, American Concrete Institute. All rights reserved.\n
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\n \n\n \n \n \n \n \n Performance metrics for seismic-resilient steel braced frame buildings.\n \n \n \n\n\n \n Serban, O.; and Tirca, L.\n\n\n \n\n\n\n In pages 2223 - 2230, Ghent, Belgium, 2019. \n \n\n\n\n
\n\n\n\n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20191506756781 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance metrics for seismic-resilient steel braced frame buildings},\njournal = {Life-Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision - Proceedings of the 6th International Symposium on Life-Cycle Civil Engineering, IALCCE 2018},\nauthor = {Serban, O. and Tirca, L.},\nyear = {2019},\npages = {2223 - 2230},\naddress = {Ghent, Belgium},\nabstract = {Disaster resilience of a building consists of its capacity to restore almost its full functionality in the aftermath of a natural hazard. Controlling the building’s resilience is important for developing the hazard mitigation strategy. The main focus of this study is to present a framework for resilience-based design of steel buildings subjected to seismic ground motions that can be extended to investigate the building performance to other natural hazards. A walk-through of the methodology is presented in a case study comprising a 3-storey moderately ductile concentrically braced frame office building located inVancouver, B.C., Canada. The building was designed according to the current Canadian building code and Steel design standard. Herein, damage levels were defined as function of performance levels associated to earthquake intensity, fragility curves were derived from incremental dynamic analysis (IDA) curves obtained from time-history analyses using the OpenSees software and both aleatoric and epistemic uncertainties were considered.<br/> © 2019 Taylor & Francis Group, London.},\nkey = {Office buildings},\n%keywords = {Codes (symbols);Architectural design;Earthquakes;Seismic design;Building codes;Hazards;Life cycle;Structural frames;Uncertainty analysis;},\n%note = {Building performance;Concentrically braced frames;Disaster resiliences;Earthquake intensity;Epistemic uncertainties;Incremental dynamic analysis;Seismic ground motions;Time history analysis;},\n} \n\n\n
\n
\n\n\n
\n Disaster resilience of a building consists of its capacity to restore almost its full functionality in the aftermath of a natural hazard. Controlling the building’s resilience is important for developing the hazard mitigation strategy. The main focus of this study is to present a framework for resilience-based design of steel buildings subjected to seismic ground motions that can be extended to investigate the building performance to other natural hazards. A walk-through of the methodology is presented in a case study comprising a 3-storey moderately ductile concentrically braced frame office building located inVancouver, B.C., Canada. The building was designed according to the current Canadian building code and Steel design standard. Herein, damage levels were defined as function of performance levels associated to earthquake intensity, fragility curves were derived from incremental dynamic analysis (IDA) curves obtained from time-history analyses using the OpenSees software and both aleatoric and epistemic uncertainties were considered.
© 2019 Taylor & Francis Group, London.\n
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\n \n\n \n \n \n \n \n \n Experimental studies and numerical simulation of two-dimensional aluminum metal foaming process under external field before solidification.\n \n \n \n \n\n\n \n Diop, M. A.; Hai, H.; and Fafard, M.\n\n\n \n\n\n\n Journal of Porous Media, 22(2): 131 - 151. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191506749727 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental studies and numerical simulation of two-dimensional aluminum metal foaming process under external field before solidification},\njournal = {Journal of Porous Media},\nauthor = {Diop, Mouhamadou A. and Hai, Hao and Fafard, Mario},\nvolume = {22},\nnumber = {2},\nyear = {2019},\npages = {131 - 151},\nissn = {1091028X},\nabstract = {An improved lattice Boltzmann model is developed to simulate the aluminum foaming process produced with a blowing agent in which gas bubbles expand in the pseudo-plastic aluminum molten matrix. This paper discusses the investigations conducted to achieve an accurate two-dimensional (2D) model of the foaming process and simulation to describe precisely the formation of metallic foams and the expansion phenomenon. The present 2D metallic foam model authorizes enquiry of bubble germination and growth; the expansion process including foam pressure, foam velocity, and foam coalescence; and eventually the evolution of temperature. Finally, the model is validated with a few conditions such as high viscosity compared to a considered pure aluminum molten, gas diffusion, drainage phenomenon; and the numerical results are found to be consistent with the analytical results.<br/> © 2019 by Begell House, Inc.},\nkey = {Multiphysics},\n%keywords = {Numerical methods;Aluminum;Metal foams;Blowing agents;},\n%note = {Analytical results;Expansion process;Lattice Boltzmann method;Lattice boltzmann models;Multi-physics;Numerical results;Simulation;Two-Dimensional (2-D) modeling;},\nURL = {http://dx.doi.org/10.1615/JPorMedia.2019028828},\n} \n\n\n
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\n An improved lattice Boltzmann model is developed to simulate the aluminum foaming process produced with a blowing agent in which gas bubbles expand in the pseudo-plastic aluminum molten matrix. This paper discusses the investigations conducted to achieve an accurate two-dimensional (2D) model of the foaming process and simulation to describe precisely the formation of metallic foams and the expansion phenomenon. The present 2D metallic foam model authorizes enquiry of bubble germination and growth; the expansion process including foam pressure, foam velocity, and foam coalescence; and eventually the evolution of temperature. Finally, the model is validated with a few conditions such as high viscosity compared to a considered pure aluminum molten, gas diffusion, drainage phenomenon; and the numerical results are found to be consistent with the analytical results.
© 2019 by Begell House, Inc.\n
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\n \n\n \n \n \n \n \n \n Experimental studies and numerical simulation of two-dimensional aluminum metal foaming process under external field before solidification.\n \n \n \n \n\n\n \n Diop, M. A.; Hai, H.; and Fafard, M.\n\n\n \n\n\n\n Journal of Porous Media, 22(3): 131 - 151. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ExperimentalPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20191506749635 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Experimental studies and numerical simulation of two-dimensional aluminum metal foaming process under external field before solidification},\njournal = {Journal of Porous Media},\nauthor = {Diop, Mouhamadou A. and Hai, Hao and Fafard, Mario},\nvolume = {22},\nnumber = {3},\nyear = {2019},\npages = {131 - 151},\nissn = {1091028X},\nabstract = {<div data-language="eng" data-ev-field="abstract">An improved lattice Boltzmann model is developed to simulate the aluminum foaming process produced with a blowing agent in which gas bubbles expand in the pseudo-plastic aluminum molten matrix. This paper discusses the investigations conducted to achieve an accurate two-dimensional (2D) model of the foaming process and simulation to describe precisely the formation of metallic foams and the expansion phenomenon. The present 2D metallic foam model authorizes enquiry of bubble germination and growth; the expansion process including foam pressure, foam velocity, and foam coalescence; and eventually the evolution of temperature. Finally, the model is validated with a few conditions such as high viscosity compared to a considered pure aluminum molten, gas diffusion, drainage phenomenon; and the numerical results are found to be consistent with the analytical results.<br/></div> © 2019 by Begell House, Inc.},\nkey = {Multiphysics},\n%keywords = {Aluminum;Blowing agents;Metal foams;Numerical methods;},\n%note = {Aluminum metal;Foaming process;Lattice Boltzmann method;Metallic foam;Metallic foaming;Metallics;Modeling;Multi-physics;Simulation;Two-dimensional;},\nURL = {http://dx.doi.org/10.1615/jpormedia.2019028828},\n} \n\n\n
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\n
An improved lattice Boltzmann model is developed to simulate the aluminum foaming process produced with a blowing agent in which gas bubbles expand in the pseudo-plastic aluminum molten matrix. This paper discusses the investigations conducted to achieve an accurate two-dimensional (2D) model of the foaming process and simulation to describe precisely the formation of metallic foams and the expansion phenomenon. The present 2D metallic foam model authorizes enquiry of bubble germination and growth; the expansion process including foam pressure, foam velocity, and foam coalescence; and eventually the evolution of temperature. Finally, the model is validated with a few conditions such as high viscosity compared to a considered pure aluminum molten, gas diffusion, drainage phenomenon; and the numerical results are found to be consistent with the analytical results.
© 2019 by Begell House, Inc.\n
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\n \n\n \n \n \n \n \n \n Performance of Bounding Surface Constitutive Models in Predicting Cyclic Behavior of Low-Plasticity Fine-Grained Soils.\n \n \n \n \n\n\n \n Eslami, M. M.; Zarrabi, M.; and Yniesta, S.\n\n\n \n\n\n\n In volume 2019-March, pages 57 - 66, Philadelphia, PA, United states, 2019. \n \n\n\n\n
\n\n\n\n \n \n \"PerformancePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@inproceedings{20191306713167 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Performance of Bounding Surface Constitutive Models in Predicting Cyclic Behavior of Low-Plasticity Fine-Grained Soils},\njournal = {Geotechnical Special Publication},\nauthor = {Eslami, Mohammad M. and Zarrabi, Mohammad and Yniesta, Samuel},\nvolume = {2019-March},\nnumber = {GSP 310},\nyear = {2019},\npages = {57 - 66},\nissn = {08950563},\naddress = {Philadelphia, PA, United states},\nabstract = {<div data-language="eng" data-ev-field="abstract">A series of cyclic and monotonic constant-height direct simple shear experiments were conducted on a low-plasticity fine-grained soil mixture. The mixture exhibits fundamental behavior that is similar to that of typical clays, but also shows features of sand-like materials, such as high excess pore pressure ratios and developing large strains in a low number of loading cycles. This paper discusses key differences in predictions of two bounding surface constitutive models in simulating the cyclic behavior of the specimens tested in the laboratory. Numerical simulations were performed first, by a model developed for clays, and second, by a model developed for sands. Both models were calibrated using an advanced optimization technique to remove bias introduced by trial and error calibration methods. The comparison of the results of the simulations with laboratory test data shows significant differences and indicates that some fundamental features of the cyclic behavior of low-plasticity fine-grained soils cannot be captured by such models, suggesting it is necessary to develop more robust constitutive models for low-plasticity fine-grained soils.<br/></div> © 2019 American Society of Civil Engineers.},\nkey = {Constitutive models},\n%keywords = {Mixtures;Soil mechanics;Soils;Geotechnical engineering;Plasticity;},\n%note = {Bounding surfaces;Direct simple shears;Excess pore pressure;Fine grained soil;Fundamental features;Low plasticities;Optimization techniques;Trial-and-error calibration;},\nURL = {http://dx.doi.org/10.1061/9780784482124.007},\n} \n\n\n
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\n
A series of cyclic and monotonic constant-height direct simple shear experiments were conducted on a low-plasticity fine-grained soil mixture. The mixture exhibits fundamental behavior that is similar to that of typical clays, but also shows features of sand-like materials, such as high excess pore pressure ratios and developing large strains in a low number of loading cycles. This paper discusses key differences in predictions of two bounding surface constitutive models in simulating the cyclic behavior of the specimens tested in the laboratory. Numerical simulations were performed first, by a model developed for clays, and second, by a model developed for sands. Both models were calibrated using an advanced optimization technique to remove bias introduced by trial and error calibration methods. The comparison of the results of the simulations with laboratory test data shows significant differences and indicates that some fundamental features of the cyclic behavior of low-plasticity fine-grained soils cannot be captured by such models, suggesting it is necessary to develop more robust constitutive models for low-plasticity fine-grained soils.
© 2019 American Society of Civil Engineers.\n
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\n \n\n \n \n \n \n \n \n Stiffness– and damping–strain curves of sensitive champlain clays through experimental and analytical approaches.\n \n \n \n \n\n\n \n Chehat, A.; Hussien, M. N.; Abdellaziz, M.; Chekired, M.; Harichane, Z.; and Karray, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 56(3): 364 - 377. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"Stiffness–Paper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20190906570027 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Stiffness– and damping–strain curves of sensitive champlain clays through experimental and analytical approaches},\njournal = {Canadian Geotechnical Journal},\nauthor = {Chehat, Azeddine and Hussien, Mahmoud N. and Abdellaziz, Mustapha and Chekired, Mohamed and Harichane, Zamila and Karray, Mourad},\nvolume = {56},\nnumber = {3},\nyear = {2019},\npages = {364 - 377},\nissn = {00083674},\nabstract = {Stiffness degradation, G/G<inf>0</inf>, curves of Champlain clay at St-Adelphe, Quebec, and the associated variation of its damping ratio with shear strain are constructed in this study using the new combined triaxial simple shear (T<inf>x</inf>SS) apparatus. The apparatus offers the ability to obtain the stiffness (G/G<inf>0</inf>) and damping ratio of soils over a wide strain spectrum from 0.001% to 10%. The value of the small-strain stiffness of the tested clay is further confirmed through another series of piezoelectric ring-actuator technique (P-RAT) tests. Although, the stiffness degradation curve of the tested clay follows to some extent traditional curves suggested in the literature, the examined Champlain clay exhibits a different trend with respect to hysteresis damping, especially at large strains (>1%), and available analytical models could not successfully predict the damping behavior of the Champlain clay at such a strain level. A new constitutive model is therefore presented as a modification of the original Sig4 model considering the pore-water pressure built up with shear strain. Stiffness degradation and damping ratio versus shear strain curves of Champlain clays estimated using the proposed soil model are similar to their experimentally determined counterparts even at large shear strains where other models tend to misjudge the damping behavior of the clay.<br/> © 2019, Canadian Science Publishing. All rights reserved.},\nkey = {Shear strain},\n%keywords = {Water;Actuators;Pressure distribution;Rats;Damping;Pore pressure;Stiffness;Piezoelectricity;},\n%note = {Champlain;Damping ratio;Piezoelectric rings;Pore-water pressures;Simple shear;},\nURL = {http://dx.doi.org/10.1139/cgj-2017-0732},\n} \n\n\n
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\n Stiffness degradation, G/G0, curves of Champlain clay at St-Adelphe, Quebec, and the associated variation of its damping ratio with shear strain are constructed in this study using the new combined triaxial simple shear (TxSS) apparatus. The apparatus offers the ability to obtain the stiffness (G/G0) and damping ratio of soils over a wide strain spectrum from 0.001% to 10%. The value of the small-strain stiffness of the tested clay is further confirmed through another series of piezoelectric ring-actuator technique (P-RAT) tests. Although, the stiffness degradation curve of the tested clay follows to some extent traditional curves suggested in the literature, the examined Champlain clay exhibits a different trend with respect to hysteresis damping, especially at large strains (>1%), and available analytical models could not successfully predict the damping behavior of the Champlain clay at such a strain level. A new constitutive model is therefore presented as a modification of the original Sig4 model considering the pore-water pressure built up with shear strain. Stiffness degradation and damping ratio versus shear strain curves of Champlain clays estimated using the proposed soil model are similar to their experimentally determined counterparts even at large shear strains where other models tend to misjudge the damping behavior of the clay.
© 2019, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Influence of particle size and gradation on shear strength–dilation relation of granular materials.\n \n \n \n \n\n\n \n Harehdasht, S. A.; Hussien, M. N.; Karray, M.; Roubtsova, V.; and Chekired, M.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 56(2): 208 - 227. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"InfluencePaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20190606462861 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Influence of particle size and gradation on shear strength–dilation relation of granular materials},\njournal = {Canadian Geotechnical Journal},\nauthor = {Harehdasht, Samaneh Amirpour and Hussien, Mahmoud N. and Karray, Mourad and Roubtsova, Varvara and Chekired, Mohamed},\nvolume = {56},\nnumber = {2},\nyear = {2019},\npages = {208 - 227},\nissn = {00083674},\nabstract = {Upon close scrutiny of data reported in the literature, taking into account particle-scale characteristics to optimize the precision of the well-known empirical Bolton’s equations and imposing particle-size limits on them is recommended. The present paper examines the potential influence of particle size and grading on the shear strength–dilation relation of granular materials from the results of 276 symmetrical direct shear tests. The applicability of physical symmetrical direct shear tests to interpret the plane strain frictional shearing resistance of granular materials has been widely discussed using the discrete element method (DEM) computer code SiGran. Sixteen different grain-size distribution curves of three different materials were tested at different normal pressures and initial relative densities. It is demonstrated that while the contribution of dilatancy to shear strength is not influenced by the variation in the coefficient of uniformity, C<inf>u</inf>, in the investigated range, it significantly decreases with increasing mean particle size, D<inf>50</inf>. The coefficients of Bolton’s equations have been, therefore, adjusted to account for D<inf>50</inf>. A comparison of the predictions by the proposed empirical formulas with plane strain friction angle, Φ<inf>ps</inf>, and dilation angle, Ψ, data from the literature shows that accounting for the grain size yields more accurate results.<br/> © 2019, Canadian Science Publishing. All rights reserved.},\nkey = {Particle size},\n%keywords = {Shear strength;Finite difference method;Grain size and shape;Friction;Granular materials;Strain;Grading;Shear flow;},\n%note = {Coefficient of uniformity;Coefficients;Dilation;Empirical formulas;Flow rules;Grain size distribution;Shape;Shearing resistance;},\nURL = {http://dx.doi.org/10.1139/cgj-2017-0468},\n} \n\n\n
\n
\n\n\n
\n Upon close scrutiny of data reported in the literature, taking into account particle-scale characteristics to optimize the precision of the well-known empirical Bolton’s equations and imposing particle-size limits on them is recommended. The present paper examines the potential influence of particle size and grading on the shear strength–dilation relation of granular materials from the results of 276 symmetrical direct shear tests. The applicability of physical symmetrical direct shear tests to interpret the plane strain frictional shearing resistance of granular materials has been widely discussed using the discrete element method (DEM) computer code SiGran. Sixteen different grain-size distribution curves of three different materials were tested at different normal pressures and initial relative densities. It is demonstrated that while the contribution of dilatancy to shear strength is not influenced by the variation in the coefficient of uniformity, Cu, in the investigated range, it significantly decreases with increasing mean particle size, D50. The coefficients of Bolton’s equations have been, therefore, adjusted to account for D50. A comparison of the predictions by the proposed empirical formulas with plane strain friction angle, Φps, and dilation angle, Ψ, data from the literature shows that accounting for the grain size yields more accurate results.
© 2019, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Adjustment of spectral pseudo-static approach to account for soil plasticity and zone seismicity.\n \n \n \n \n\n\n \n Karray, M.; Hussien, M. N.; Souilem, M.; Locat, P.; and Mompin, R.\n\n\n \n\n\n\n Canadian Geotechnical Journal, 56(2): 173 - 186. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"AdjustmentPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20190606462858 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Adjustment of spectral pseudo-static approach to account for soil plasticity and zone seismicity},\njournal = {Canadian Geotechnical Journal},\nauthor = {Karray, Mourad and Hussien, Mahmoud N. and Souilem, Mohamed and Locat, Pascal and Mompin, Remi},\nvolume = {56},\nnumber = {2},\nyear = {2019},\npages = {173 - 186},\nissn = {00083674},\nabstract = {The concept of the spectral pseudo-static procedure has been developed at the Université de Sherbrooke as an alternative to the conventional pseudo-static approach for the seismic stability analysis of clayey slopes. The destabilizing effect of an earthquake is approximated, in the new approach, by an inertial force that hyperbolically varies with depth while being proportional to the maximum acceleration of the seismic event. Its results have been rigorously verified against available static and dynamic laboratory tests, and have been extensively validated by a series of simulations performed using the computer code FLAC. Good agreements have been achieved between the results of the spectral pseudo-static procedure and complete numerical analyses, in terms of the computed safety factors and the critical slip surfaces. This implies that the spectral pseudo-static approach can be integrated into available limit equilibrium (LE) software providing a useful tool to examine the effect of dynamic soil characteristics on the proposed seismic coefficient profiles. The herein-reported study extends the previous endeavors to examine and quantify the effect of plasticity index (PI) (0%, 15%, 30%, 50%, and 100%) on the proposed formula of seismic coefficient profile using the same numerical modelling and assumptions. Original analyses were carried out considering earthquakes compatible with the seismicity of Quebec City (zone 4), and they have been repeated in the current study for earthquakes compatible with other regions having different seismicity (zones 2, 3, and 5). Based on the results of the current analyses, side-formulas were established between the spectral pseudo-static coefficient on ground surface for any value of soil plasticity index (PI) and the corresponding coefficient originally used in the main formula (PI = 30%).<br/> © 2019, Canadian Science Publishing. All rights reserved.},\nkey = {Earthquakes},\n%keywords = {Soils;Plasticity;Safety factor;Failure (mechanical);},\n%note = {Cohesive soils;Failure surface;Plasticity indices;Pseudostatic;Seismic zones;},\nURL = {http://dx.doi.org/10.1139/cgj-2017-0414},\n} \n\n\n
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\n The concept of the spectral pseudo-static procedure has been developed at the Université de Sherbrooke as an alternative to the conventional pseudo-static approach for the seismic stability analysis of clayey slopes. The destabilizing effect of an earthquake is approximated, in the new approach, by an inertial force that hyperbolically varies with depth while being proportional to the maximum acceleration of the seismic event. Its results have been rigorously verified against available static and dynamic laboratory tests, and have been extensively validated by a series of simulations performed using the computer code FLAC. Good agreements have been achieved between the results of the spectral pseudo-static procedure and complete numerical analyses, in terms of the computed safety factors and the critical slip surfaces. This implies that the spectral pseudo-static approach can be integrated into available limit equilibrium (LE) software providing a useful tool to examine the effect of dynamic soil characteristics on the proposed seismic coefficient profiles. The herein-reported study extends the previous endeavors to examine and quantify the effect of plasticity index (PI) (0%, 15%, 30%, 50%, and 100%) on the proposed formula of seismic coefficient profile using the same numerical modelling and assumptions. Original analyses were carried out considering earthquakes compatible with the seismicity of Quebec City (zone 4), and they have been repeated in the current study for earthquakes compatible with other regions having different seismicity (zones 2, 3, and 5). Based on the results of the current analyses, side-formulas were established between the spectral pseudo-static coefficient on ground surface for any value of soil plasticity index (PI) and the corresponding coefficient originally used in the main formula (PI = 30%).
© 2019, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Dynamic characteristics of light-frame wood buildings.\n \n \n \n \n\n\n \n Hafeez, G.; Doudak, G.; and McClure, G.\n\n\n \n\n\n\n Canadian Journal of Civil Engineering, 46(1): 1 - 12. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"DynamicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20190206352909 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Dynamic characteristics of light-frame wood buildings},\njournal = {Canadian Journal of Civil Engineering},\nauthor = {Hafeez, Ghazanfarah and Doudak, Ghasan and McClure, Ghyslaine},\nvolume = {46},\nnumber = {1},\nyear = {2019},\npages = {1 - 12},\nissn = {03151468},\nabstract = {This paper deals with dynamic field testing of light-frame wood buildings with wood based shear walls. The primary objective of the investigation is to provide an estimate of the fundamental period of such buildings, through field testing and numerical modeling. An experimental program is established to perform ambient vibration testing on 41 light-frame wood buildings of both regular and irregular layouts, located in moderate to high seismic zones in different regions in Canada. The research objective is to develop a reliable method of estimating the building period of light-frame wood buildings and develop an accurate expression for building period estimate based on field testing and numerical modeling. The study found that significant scatter is observed in the measured data when plotted as a function of building height. Finite element (FE) models were developed and compared with the natural periods of the buildings with reasonable accuracy. Using the validated FE models to examine different commonly used stiffness models showed that in general current analysis approaches overestimate the building period.<br/> © 2019, Canadian Science Publishing. All rights reserved.},\nkey = {Stiffness},\n%keywords = {Wood;Wooden buildings;Numerical models;Software testing;Numerical methods;},\n%note = {Ambient Vibration Testing;Dynamic characteristics;Experimental program;Fundamental building period;Lateral drifts;Light frames;Research objectives;Timber structures;},\nURL = {http://dx.doi.org/10.1139/cjce-2017-0266},\n} \n\n\n
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\n This paper deals with dynamic field testing of light-frame wood buildings with wood based shear walls. The primary objective of the investigation is to provide an estimate of the fundamental period of such buildings, through field testing and numerical modeling. An experimental program is established to perform ambient vibration testing on 41 light-frame wood buildings of both regular and irregular layouts, located in moderate to high seismic zones in different regions in Canada. The research objective is to develop a reliable method of estimating the building period of light-frame wood buildings and develop an accurate expression for building period estimate based on field testing and numerical modeling. The study found that significant scatter is observed in the measured data when plotted as a function of building height. Finite element (FE) models were developed and compared with the natural periods of the buildings with reasonable accuracy. Using the validated FE models to examine different commonly used stiffness models showed that in general current analysis approaches overestimate the building period.
© 2019, Canadian Science Publishing. All rights reserved.\n
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\n \n\n \n \n \n \n \n \n Implementation of a soil-structure interface constitutive model for application in geo-structures.\n \n \n \n \n\n\n \n Saberi, M.; Annan, C.; and Konrad, J.\n\n\n \n\n\n\n Soil Dynamics and Earthquake Engineering, 116: 714 - 731. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"ImplementationPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
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@article{20184706128442 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Implementation of a soil-structure interface constitutive model for application in geo-structures},\njournal = {Soil Dynamics and Earthquake Engineering},\nauthor = {Saberi, Miad and Annan, Charles-Darwin and Konrad, Jean-Marie},\nvolume = {116},\nyear = {2019},\npages = {714 - 731},\nissn = {02677261},\nabstract = {In this paper, an implementation of an advanced two-surface plasticity interface constitutive model in a general-purpose finite element code ABAQUS for application in soil-structure interaction problems under static and dynamic loading conditions is presented. A recently developed constitutive model by the authors for gravelly soil-structure interface was improved to simulate the behavior of both gravelly and sandy soil-structure interfaces. A new failure surface was introduced into the model in order to simulate the softening behavior of interfaces under monotonic and cyclic loading. The constitutive model was then implemented in ABAQUS as a thin-layer interface element to demonstrate its capabilities in representing the complex behavior under different stress paths and normal stresses, including debonding and rebonding mechanisms at interface zones. The accuracy and robustness of the numerical implementation algorithm was examined by considering the effect of time step size, and by simulating different boundary value problems. The numerical predictions under different loading and boundary conditions were compared with experimental observations.<br/> © 2018 Elsevier Ltd},\nkey = {Constitutive models},\n%keywords = {Boundary value problems;Soil structure interactions;Loading;Soils;Dynamic loads;ABAQUS;},\n%note = {Constitutive formulation;Cyclic response;Granular soils;Model implementation;Numerical examples;},\nURL = {http://dx.doi.org/10.1016/j.soildyn.2018.11.001},\n} \n\n\n
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\n In this paper, an implementation of an advanced two-surface plasticity interface constitutive model in a general-purpose finite element code ABAQUS for application in soil-structure interaction problems under static and dynamic loading conditions is presented. A recently developed constitutive model by the authors for gravelly soil-structure interface was improved to simulate the behavior of both gravelly and sandy soil-structure interfaces. A new failure surface was introduced into the model in order to simulate the softening behavior of interfaces under monotonic and cyclic loading. The constitutive model was then implemented in ABAQUS as a thin-layer interface element to demonstrate its capabilities in representing the complex behavior under different stress paths and normal stresses, including debonding and rebonding mechanisms at interface zones. The accuracy and robustness of the numerical implementation algorithm was examined by considering the effect of time step size, and by simulating different boundary value problems. The numerical predictions under different loading and boundary conditions were compared with experimental observations.
© 2018 Elsevier Ltd\n
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\n \n\n \n \n \n \n \n \n Seismic responses of bridges with rocking column-foundation: A dimensionless regression analysis.\n \n \n \n \n\n\n \n Zhang, J.; Xie, Y.; and Wu, G.\n\n\n \n\n\n\n Earthquake Engineering and Structural Dynamics, 48(1): 152 - 170. 2019.\n \n\n\n\n
\n\n\n\n \n \n \"SeismicPaper\n  \n \n\n \n\n \n link\n  \n \n\n bibtex\n \n\n \n  \n \n abstract \n \n\n \n\n \n \n \n \n \n \n \n\n  \n \n \n\n\n\n
\n
@article{20184706108293 ,\nlanguage = {English},\ncopyright = {Compilation and indexing terms, Copyright 2025 Elsevier Inc.},\ncopyright = {Compendex},\ntitle = {Seismic responses of bridges with rocking column-foundation: A dimensionless regression analysis},\njournal = {Earthquake Engineering and Structural Dynamics},\nauthor = {Zhang, Jian and Xie, Yazhou and Wu, Gang},\nvolume = {48},\nnumber = {1},\nyear = {2019},\npages = {152 - 170},\nissn = {00988847},\nabstract = {Rocking column-foundation system is a new design concept for bridges that can reduce overall seismic damage, minimize construction and repair time, and achieve lower cost in general. However, such system involves complex dynamic responses due to impacts and highly nonlinear rocking behavior. This study presents a dimensionless regression analysis to estimate the rocking and shaking responses of the flexible column-foundation system under near-fault ground motions. First, the transient drift and rocking responses of the system are solved numerically using previously established analytical models. Subsequently, the peak column drifts and uplift angles are derived as functions of ground motion characteristics and the geometric and dynamic parameters of column-foundation system in regressed dimensionless forms. The proposed response models are further examined by validating against the numerical simulations for several as-built bridge cases. It is shown that the proposed model not only physically quantifies the influences of prominent parameters, but also consistently reflects the complex dynamics of the system. The seismic demands of rocking column-foundation system can be realistically predicted directly from structural and ground motion characteristics. This can significantly benefit the design of bridges incorporating this new design concept.<br/> © 2018 John Wiley & Sons, Ltd.},\nkey = {Bridges},\n%keywords = {Seismic design;Foundations;Regression analysis;Seismic response;},\n%note = {Complex dynamics;Dynamic parameters;Foundation systems;Foundation uplift;Ground motion characteristics;Near fault ground motion;rocking;Rocking response;},\nURL = {http://dx.doi.org/10.1002/eqe.3129},\n} \n\n\n\n
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\n Rocking column-foundation system is a new design concept for bridges that can reduce overall seismic damage, minimize construction and repair time, and achieve lower cost in general. However, such system involves complex dynamic responses due to impacts and highly nonlinear rocking behavior. This study presents a dimensionless regression analysis to estimate the rocking and shaking responses of the flexible column-foundation system under near-fault ground motions. First, the transient drift and rocking responses of the system are solved numerically using previously established analytical models. Subsequently, the peak column drifts and uplift angles are derived as functions of ground motion characteristics and the geometric and dynamic parameters of column-foundation system in regressed dimensionless forms. The proposed response models are further examined by validating against the numerical simulations for several as-built bridge cases. It is shown that the proposed model not only physically quantifies the influences of prominent parameters, but also consistently reflects the complex dynamics of the system. The seismic demands of rocking column-foundation system can be realistically predicted directly from structural and ground motion characteristics. This can significantly benefit the design of bridges incorporating this new design concept.
© 2018 John Wiley & Sons, Ltd.\n
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