Evaluation of seismic performance of X bracing systems equipped with flexural yielding dampers

The X-bracing system is one of the lateral loads bearing system. In X-bracing system’s elements, axial plastic hinges (compressive or tensile) will be formed instead of flexural hinges which are not capable to absorb high energy. Seismic performance can be improved by replacing these plastic hinges...

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Autores principales:	Mussa Mahmoudi Sahebi, Farshid Khanjani
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2017
Materias:	ductility capacity yielding damper seismic performance strength capacity force reduction factor x bracing Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/52cf200362eb4537bf593a093473281e
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spelling	oai:doaj.org-article:52cf200362eb4537bf593a093473281e2021-11-08T15:46:36ZEvaluation of seismic performance of X bracing systems equipped with flexural yielding dampers2476-39772538-261610.22065/jsce.2017.71596.1034https://doaj.org/article/52cf200362eb4537bf593a093473281e2017-08-01T00:00:00Zhttps://www.jsce.ir/article_44835_0a5c43879b0bc1b617f475db567b0932.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616The X-bracing system is one of the lateral loads bearing system. In X-bracing system’s elements, axial plastic hinges (compressive or tensile) will be formed instead of flexural hinges which are not capable to absorb high energy. Seismic performance can be improved by replacing these plastic hinges with the bending plastic joints. In this study, a new kind of X-bracing named X-bracing equipped with flexural yielding damper is introduced in which the plastic axial hinges is substituted by flexural plastic hinges. In this kind of bracing the failure mechanisms focuses on flexural hinges. The objective of this study is to evaluate the seismic performance of this kind of bracing. For this purpose, several X-bracing frames with various stories was selected and designed based on Iranian building codes. The seismic performance of these frames (stiffness capacity, strength capacity, and ductility capacity) and force reduction factors were evaluated using static and time history nonlinear analysis. In dynamic time history analysis seven acceleration-time records was applied. The results show that the damper reduces stiffness and strength capacity inconsiderably, but increases the ductility capacity significantly. It also increases the force reduction factor of the frames significantly. The amount of force reduction factor for this system is the same as eccentrically braced frame one.Mussa Mahmoudi SahebiFarshid KhanjaniIranian Society of Structrual Engineering (ISSE)articleductility capacityyielding damperseismic performancestrength capacityforce reduction factorx bracingBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 4, Iss 2, Pp 123-138 (2017)
institution	DOAJ
collection	DOAJ
language	FA
topic	ductility capacity yielding damper seismic performance strength capacity force reduction factor x bracing Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	ductility capacity yielding damper seismic performance strength capacity force reduction factor x bracing Bridge engineering TG1-470 Building construction TH1-9745 Mussa Mahmoudi Sahebi Farshid Khanjani Evaluation of seismic performance of X bracing systems equipped with flexural yielding dampers
description	The X-bracing system is one of the lateral loads bearing system. In X-bracing system’s elements, axial plastic hinges (compressive or tensile) will be formed instead of flexural hinges which are not capable to absorb high energy. Seismic performance can be improved by replacing these plastic hinges with the bending plastic joints. In this study, a new kind of X-bracing named X-bracing equipped with flexural yielding damper is introduced in which the plastic axial hinges is substituted by flexural plastic hinges. In this kind of bracing the failure mechanisms focuses on flexural hinges. The objective of this study is to evaluate the seismic performance of this kind of bracing. For this purpose, several X-bracing frames with various stories was selected and designed based on Iranian building codes. The seismic performance of these frames (stiffness capacity, strength capacity, and ductility capacity) and force reduction factors were evaluated using static and time history nonlinear analysis. In dynamic time history analysis seven acceleration-time records was applied. The results show that the damper reduces stiffness and strength capacity inconsiderably, but increases the ductility capacity significantly. It also increases the force reduction factor of the frames significantly. The amount of force reduction factor for this system is the same as eccentrically braced frame one.
format	article
author	Mussa Mahmoudi Sahebi Farshid Khanjani
author_facet	Mussa Mahmoudi Sahebi Farshid Khanjani
author_sort	Mussa Mahmoudi Sahebi
title	Evaluation of seismic performance of X bracing systems equipped with flexural yielding dampers
title_short	Evaluation of seismic performance of X bracing systems equipped with flexural yielding dampers
title_full	Evaluation of seismic performance of X bracing systems equipped with flexural yielding dampers
title_fullStr	Evaluation of seismic performance of X bracing systems equipped with flexural yielding dampers
title_full_unstemmed	Evaluation of seismic performance of X bracing systems equipped with flexural yielding dampers
title_sort	evaluation of seismic performance of x bracing systems equipped with flexural yielding dampers
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2017
url	https://doaj.org/article/52cf200362eb4537bf593a093473281e
work_keys_str_mv	AT mussamahmoudisahebi evaluationofseismicperformanceofxbracingsystemsequippedwithflexuralyieldingdampers AT farshidkhanjani evaluationofseismicperformanceofxbracingsystemsequippedwithflexuralyieldingdampers
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Evaluation of seismic performance of X bracing systems equipped with flexural yielding dampers

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