Optimization of nonlinear viscous damper characteristics to reduce the response of concrete structures with linear and nonlinear behaviours

Nowadays, controlling vibration of a structure in earthquakes and reducing the structural responses are of great importance. Dampers are a type of systems controlling the absorption of the earthquake energy and dissipating it in order to reduce the structural responses. The main objective of this pa...

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Autores principales:	Reza Kamgar, Mohammad Reza Babadaei Samani, Heisam Heidarzadeh
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2020
Materias:	dynamic analysis nonlinear viscous damper optimization vibration control gray wolf algorithm opensees Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/798a6b2a463f4159bb5a22c589adfe56
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spelling	oai:doaj.org-article:798a6b2a463f4159bb5a22c589adfe562021-11-08T15:54:03ZOptimization of nonlinear viscous damper characteristics to reduce the response of concrete structures with linear and nonlinear behaviours2476-39772538-261610.22065/jsce.2019.148073.1659https://doaj.org/article/798a6b2a463f4159bb5a22c589adfe562020-10-01T00:00:00Zhttps://www.jsce.ir/article_81548_78888d20930e3857511a95eff9b84663.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Nowadays, controlling vibration of a structure in earthquakes and reducing the structural responses are of great importance. Dampers are a type of systems controlling the absorption of the earthquake energy and dissipating it in order to reduce the structural responses. The main objective of this paper is to find the optimal characteristics of the nonlinear viscose dampers placed at all storeys in a three-storey single bay concrete frame. It is assumed that the structure is subjected to the Elcentro and Gazli earthquakes; and both linear and nonlinear behaviors are considered for the structure during the earthquakes. OpenSees software is used to model the concrete frame and nonlinear viscous dampers. The structural responses are calculated at different time steps, using Newmark's numerical method. A series of constraints which are considered during the optimization process include the limits for parameters of nonlinear viscous damper (Viscous coefficient, axial stiffness and damper exponent) and the maximum absolute value for base shear. The objective is to find optimal values for these parameters in such a way that the maximum absolute value would be minimized for the roof displacement during the earthquake load. The results show that the nonlinear viscous damper is very suitable to control the structure responses when it has linear behavior. In fact, when the structure is subjected to the Elcentro earthquake, the maximum absolute value of the roof displacement and base shear decrease by 37.51% and 43.39%, respectively. The nonlinear behavior of the concrete frame does not improved considerably when the nonlinear viscous dampers are used to control the nonlinear response of the structure in the earthquake.Reza KamgarMohammad Reza Babadaei SamaniHeisam HeidarzadehIranian Society of Structrual Engineering (ISSE)articledynamic analysisnonlinear viscous damperoptimizationvibration controlgray wolf algorithmopenseesBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 7, Iss شماره ویژه 3, Pp 145-166 (2020)
institution	DOAJ
collection	DOAJ
language	FA
topic	dynamic analysis nonlinear viscous damper optimization vibration control gray wolf algorithm opensees Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	dynamic analysis nonlinear viscous damper optimization vibration control gray wolf algorithm opensees Bridge engineering TG1-470 Building construction TH1-9745 Reza Kamgar Mohammad Reza Babadaei Samani Heisam Heidarzadeh Optimization of nonlinear viscous damper characteristics to reduce the response of concrete structures with linear and nonlinear behaviours
description	Nowadays, controlling vibration of a structure in earthquakes and reducing the structural responses are of great importance. Dampers are a type of systems controlling the absorption of the earthquake energy and dissipating it in order to reduce the structural responses. The main objective of this paper is to find the optimal characteristics of the nonlinear viscose dampers placed at all storeys in a three-storey single bay concrete frame. It is assumed that the structure is subjected to the Elcentro and Gazli earthquakes; and both linear and nonlinear behaviors are considered for the structure during the earthquakes. OpenSees software is used to model the concrete frame and nonlinear viscous dampers. The structural responses are calculated at different time steps, using Newmark's numerical method. A series of constraints which are considered during the optimization process include the limits for parameters of nonlinear viscous damper (Viscous coefficient, axial stiffness and damper exponent) and the maximum absolute value for base shear. The objective is to find optimal values for these parameters in such a way that the maximum absolute value would be minimized for the roof displacement during the earthquake load. The results show that the nonlinear viscous damper is very suitable to control the structure responses when it has linear behavior. In fact, when the structure is subjected to the Elcentro earthquake, the maximum absolute value of the roof displacement and base shear decrease by 37.51% and 43.39%, respectively. The nonlinear behavior of the concrete frame does not improved considerably when the nonlinear viscous dampers are used to control the nonlinear response of the structure in the earthquake.
format	article
author	Reza Kamgar Mohammad Reza Babadaei Samani Heisam Heidarzadeh
author_facet	Reza Kamgar Mohammad Reza Babadaei Samani Heisam Heidarzadeh
author_sort	Reza Kamgar
title	Optimization of nonlinear viscous damper characteristics to reduce the response of concrete structures with linear and nonlinear behaviours
title_short	Optimization of nonlinear viscous damper characteristics to reduce the response of concrete structures with linear and nonlinear behaviours
title_full	Optimization of nonlinear viscous damper characteristics to reduce the response of concrete structures with linear and nonlinear behaviours
title_fullStr	Optimization of nonlinear viscous damper characteristics to reduce the response of concrete structures with linear and nonlinear behaviours
title_full_unstemmed	Optimization of nonlinear viscous damper characteristics to reduce the response of concrete structures with linear and nonlinear behaviours
title_sort	optimization of nonlinear viscous damper characteristics to reduce the response of concrete structures with linear and nonlinear behaviours
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2020
url	https://doaj.org/article/798a6b2a463f4159bb5a22c589adfe56
work_keys_str_mv	AT rezakamgar optimizationofnonlinearviscousdampercharacteristicstoreducetheresponseofconcretestructureswithlinearandnonlinearbehaviours AT mohammadrezababadaeisamani optimizationofnonlinearviscousdampercharacteristicstoreducetheresponseofconcretestructureswithlinearandnonlinearbehaviours AT heisamheidarzadeh optimizationofnonlinearviscousdampercharacteristicstoreducetheresponseofconcretestructureswithlinearandnonlinearbehaviours
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Optimization of nonlinear viscous damper characteristics to reduce the response of concrete structures with linear and nonlinear behaviours

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