Response modification factor of eccentrically braced frames with reduced beam section

Eccentrically braced frames are one of the most proper lateral resisting systems in seismic areas. The link beam in an eccentrically braced frame acts like a structural fuse, which is able to sustain large plastic shear or flexural deformations. Therefore, other structural members such as beams and...

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Autores principales:	Reaza Asgari Sahroon, Nader Hoveidae
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2018
Materias:	eccentrically braced frame reduced beam section response modification factor pushover analysis time history analysis Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/c0d9fe495bb34a25a68915554cc44f32
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spelling	oai:doaj.org-article:c0d9fe495bb34a25a68915554cc44f322021-11-08T15:48:00ZResponse modification factor of eccentrically braced frames with reduced beam section2476-39772538-261610.22065/jsce.2017.86381.1195https://doaj.org/article/c0d9fe495bb34a25a68915554cc44f322018-06-01T00:00:00Zhttps://www.jsce.ir/article_48096_883c590f349a21e78302a7c07949bfc9.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Eccentrically braced frames are one of the most proper lateral resisting systems in seismic areas. The link beam in an eccentrically braced frame acts like a structural fuse, which is able to sustain large plastic shear or flexural deformations. Therefore, other structural members such as beams and columns are expected to remain elastic during a severe seismic ground motion. The reduced beam section has recently been proposed for moment resisting frames, which results in the concentration of the plastic deformations at the ends of the beams and in a place far from the connection. In this paper, reduced beam sections are implemented in an eccentrically braced frame (Dual system) at the ends of link beams as well as other beams placed inside the moment resisting frame. Finite element analyses in ABAQUS software are conducted in order to evaluate and compare the seismic response of the eccentrically braced frames with reduced beam sections and without them. For this purpose, 4, 8, and 12 story braced frames designed according to Iranian national building codes are considered. Pushover analysis and also nonlinear time history analysis are carried out. The results show that the braced frames including reduced beam sections at the ends of the link beam and other beams, possess higher ductility and response modification factor. In addition, the results show that during time history analyses, the systems with reduced beam sections experience higher inter-story drift demands in comparison to the system without reduced beam section.Reaza Asgari SahroonNader HoveidaeIranian Society of Structrual Engineering (ISSE)articleeccentrically braced framereduced beam sectionresponse modification factorpushover analysistime history analysisBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 5, Iss 1, Pp 210-227 (2018)
institution	DOAJ
collection	DOAJ
language	FA
topic	eccentrically braced frame reduced beam section response modification factor pushover analysis time history analysis Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	eccentrically braced frame reduced beam section response modification factor pushover analysis time history analysis Bridge engineering TG1-470 Building construction TH1-9745 Reaza Asgari Sahroon Nader Hoveidae Response modification factor of eccentrically braced frames with reduced beam section
description	Eccentrically braced frames are one of the most proper lateral resisting systems in seismic areas. The link beam in an eccentrically braced frame acts like a structural fuse, which is able to sustain large plastic shear or flexural deformations. Therefore, other structural members such as beams and columns are expected to remain elastic during a severe seismic ground motion. The reduced beam section has recently been proposed for moment resisting frames, which results in the concentration of the plastic deformations at the ends of the beams and in a place far from the connection. In this paper, reduced beam sections are implemented in an eccentrically braced frame (Dual system) at the ends of link beams as well as other beams placed inside the moment resisting frame. Finite element analyses in ABAQUS software are conducted in order to evaluate and compare the seismic response of the eccentrically braced frames with reduced beam sections and without them. For this purpose, 4, 8, and 12 story braced frames designed according to Iranian national building codes are considered. Pushover analysis and also nonlinear time history analysis are carried out. The results show that the braced frames including reduced beam sections at the ends of the link beam and other beams, possess higher ductility and response modification factor. In addition, the results show that during time history analyses, the systems with reduced beam sections experience higher inter-story drift demands in comparison to the system without reduced beam section.
format	article
author	Reaza Asgari Sahroon Nader Hoveidae
author_facet	Reaza Asgari Sahroon Nader Hoveidae
author_sort	Reaza Asgari Sahroon
title	Response modification factor of eccentrically braced frames with reduced beam section
title_short	Response modification factor of eccentrically braced frames with reduced beam section
title_full	Response modification factor of eccentrically braced frames with reduced beam section
title_fullStr	Response modification factor of eccentrically braced frames with reduced beam section
title_full_unstemmed	Response modification factor of eccentrically braced frames with reduced beam section
title_sort	response modification factor of eccentrically braced frames with reduced beam section
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2018
url	https://doaj.org/article/c0d9fe495bb34a25a68915554cc44f32
work_keys_str_mv	AT reazaasgarisahroon responsemodificationfactorofeccentricallybracedframeswithreducedbeamsection AT naderhoveidae responsemodificationfactorofeccentricallybracedframeswithreducedbeamsection
_version_	1718441698820882432

Response modification factor of eccentrically braced frames with reduced beam section

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