@inproceedings{20152000839622 ,
language = {English},
copyright = {Compilation and indexing terms, Copyright 2023 Elsevier Inc.},
copyright = {Compendex},
title = {Seismic performance evaluation and design of multi-tiered steel concentrically braced frames},
journal = {NCEE 2014 - 10th U.S. National Conference on Earthquake Engineering: Frontiers of Earthquake Engineering},
author = {Imanpour, A. and Tremblay, R.},
year = {2014},
pages = {Computers and Structures Inc. (CSI); ConocoPhillips; et al.; Federal Emergency Management Agency (FEMA); Golder Associates; State of Alaska, Division of Geological and Geophysical Surveys (DGGS) - },
address = {Anchorage, AK, United states},
abstract = {This research investigates the seismic response of multi-tiered concentrically steel braced frames. 3- and 5-tiered X-braced frames with moderate ductility are designed according to current Canadian code provisions for steel structures. Nonlinear seismic response of the braced frames is examined through nonlinear dynamic analyses to study the influence of the design parameters including the number of bracing panels and the use of out-of-plane notional load in design. The focus is on the in-plane seismic demand imposed on the columns when buckling and yielding of the bracing members occur. Out-of-plane stability of the columns is also investigated. The results show that columns designed in accordance with the current provisions improves the 3-tiered braced frame response and induces uniform, less critical, ductility demand on the braces due to the columns' high in-plane flexural strength and stiffness. Higher ductility demand is induced in the frame with 5 tiers due to non-uniform vertical distribution of brace yielding. An alternative design method that explicitly accounts for column in-plane bending moment demands and ensures proper distribution of the inelastic demand is proposed.<br/>},
key = {Seismic response},
keywords = {Seismic design;Structural frames;Ductility;Engineering geology;},
note = {Alternative designs;Concentrically braced frames;In-plane bending moment;Nonlinear seismic response;Out of plane stability;Seismic performance evaluation;Strength and stiffness;Vertical distributions;},
URL = {http://dx.doi.org/10.4231/D3XS5JH72},
}

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(CSI); ConocoPhillips; et al.; Federal Emergency Management Agency (FEMA); Golder Associates; State of Alaska, Division of Geological and Geophysical Surveys (DGGS) - ","address":"Anchorage, AK, United states","abstract":"This research investigates the seismic response of multi-tiered concentrically steel braced frames. 3- and 5-tiered X-braced frames with moderate ductility are designed according to current Canadian code provisions for steel structures. Nonlinear seismic response of the braced frames is examined through nonlinear dynamic analyses to study the influence of the design parameters including the number of bracing panels and the use of out-of-plane notional load in design. The focus is on the in-plane seismic demand imposed on the columns when buckling and yielding of the bracing members occur. Out-of-plane stability of the columns is also investigated. The results show that columns designed in accordance with the current provisions improves the 3-tiered braced frame response and induces uniform, less critical, ductility demand on the braces due to the columns' high in-plane flexural strength and stiffness. Higher ductility demand is induced in the frame with 5 tiers due to non-uniform vertical distribution of brace yielding. 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