Effectiveness evaluation and optimal design of nonlinear viscous dampers for inelastic structures under pulse-type ground motions. Xie, Y., Zhang, J., & Xi, W. Earthquake Engineering and Structural Dynamics, 47(14):2802 - 2820, 2018. Genetic optimization;Inelastic structure;Nonlinear damping;Nonlinear viscous dampers;Optimal design;Performance indices;![Effectiveness evaluation and optimal design of nonlinear viscous dampers for inelastic structures under pulse-type ground motions [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex This paper addresses the effectiveness and optimal design of nonlinear viscous dampers for inelastic structures. First, a nonlinear damping index is derived by using the dimensional analysis to estimate the damping induced by supplemental nonlinear dampers on inelastic single degree of freedom (SDOF) structures. Subsequently, the effects of the added nonlinear damping on the seismic responses of inelastic SDOF systems are analyzed in dimensionless forms when subject to various near-fault ground motions. The structure-to-motion frequency ratio, the motion characteristics, and the structural nonlinearity are the main factors that will affect the damping effectiveness. Especially, it is shown that adding nonlinear viscous dampers will decrease displacement demands yet sometimes lead to amplified acceleration responses. Furthermore, an equivalency procedure is developed to match the inelastic multi-degree of freedom (MDOF) structure that is equipped with multiple nonlinear viscous dampers to its corresponding SDOF system. Such equivalency justifies that the analysis results for the viscous damping efficiency on SDOF systems can be congruously applied to realistic multi-story structures. Finally, the optimal designs of nonlinear dampers for MDOF inelastic structures are identified by implementing a hybrid genetic optimization framework along with a robust performance index.
© 2018 John Wiley & Sons, Ltd.
@article{20183605767631 ,
language = {English},
copyright = {Compilation and indexing terms, Copyright 2023 Elsevier Inc.},
copyright = {Compendex},
title = {Effectiveness evaluation and optimal design of nonlinear viscous dampers for inelastic structures under pulse-type ground motions},
journal = {Earthquake Engineering and Structural Dynamics},
author = {Xie, Yazhou and Zhang, Jian and Xi, Wang},
volume = {47},
number = {14},
year = {2018},
pages = {2802 - 2820},
issn = {00988847},
abstract = {This paper addresses the effectiveness and optimal design of nonlinear viscous dampers for inelastic structures. First, a nonlinear damping index is derived by using the dimensional analysis to estimate the damping induced by supplemental nonlinear dampers on inelastic single degree of freedom (SDOF) structures. Subsequently, the effects of the added nonlinear damping on the seismic responses of inelastic SDOF systems are analyzed in dimensionless forms when subject to various near-fault ground motions. The structure-to-motion frequency ratio, the motion characteristics, and the structural nonlinearity are the main factors that will affect the damping effectiveness. Especially, it is shown that adding nonlinear viscous dampers will decrease displacement demands yet sometimes lead to amplified acceleration responses. Furthermore, an equivalency procedure is developed to match the inelastic multi-degree of freedom (MDOF) structure that is equipped with multiple nonlinear viscous dampers to its corresponding SDOF system. Such equivalency justifies that the analysis results for the viscous damping efficiency on SDOF systems can be congruously applied to realistic multi-story structures. Finally, the optimal designs of nonlinear dampers for MDOF inelastic structures are identified by implementing a hybrid genetic optimization framework along with a robust performance index.<br/> © 2018 John Wiley & Sons, Ltd.},
key = {Damping},
keywords = {Optimal systems;Structural optimization;Degrees of freedom (mechanics);Ultrasonic devices;},
note = {Genetic optimization;Inelastic structure;Nonlinear damping;Nonlinear viscous dampers;Optimal design;Performance indices;},
URL = {http://dx.doi.org/10.1002/eqe.3109},
}
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