Influence of geometric parameters on perforated core buckling restrained braces behavior

Buckling Restrained Braces (BRBs) are installed in buildings to control lateral displacements caused by seismic events. Although, conventional BRBs have various advantages comparing to ordinary bracing systems, their high weight and dimensions because of the restraining units is a dominant drawback....

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Autores principales:	Hashem Jahangir, Mohammad Hasan Daneshvar Khorram, M. Ghalehnovi
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	lateral loads innovative brbs perforated core geometrical parameters absorbed energy Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/490b5500b6e24b2c94c78d31ab795e4e
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id	oai:doaj.org-article:490b5500b6e24b2c94c78d31ab795e4e
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spelling	oai:doaj.org-article:490b5500b6e24b2c94c78d31ab795e4e2021-11-08T15:52:50ZInfluence of geometric parameters on perforated core buckling restrained braces behavior2476-39772538-261610.22065/jsce.2018.101904.1359https://doaj.org/article/490b5500b6e24b2c94c78d31ab795e4e2019-11-01T00:00:00Zhttps://www.jsce.ir/article_60347_82460573fba832c79f9d5959125e1a63.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Buckling Restrained Braces (BRBs) are installed in buildings to control lateral displacements caused by seismic events. Although, conventional BRBs have various advantages comparing to ordinary bracing systems, their high weight and dimensions because of the restraining units is a dominant drawback. In this paper, a new developed type of BRB named perforated core buckling restrained brace is investigated which resolved conventional BRBs shortcoming. Its core consists of a perforated steel yielding plate which is guided and partially stabilized by the restraining unit. The core is mechanized to obtain two yielding lateral bands which are connected by several equidistant stabilizing bridges. At first part of the paper, the hysteretic behaviour of the tested braces and a large scale brace has been analysed and verified with an FEM model which considers the interaction between the core and the encasing member. The model reproduces the hysteretic response during the first cycles and the influence of friction on the axial strain distribution along the yielding core. In the second part, geometrical parameters such as number of holes and their section in the core of brace were studied and trough hysteretic behaviour, stress distribution, core deformation and its condition under ultimate loads, the optimized core is selected and suggested.Hashem JahangirMohammad Hasan Daneshvar KhorramM. GhalehnoviIranian Society of Structrual Engineering (ISSE)articlelateral loadsinnovative brbsperforated coregeometrical parametersabsorbed energyBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 6, Iss شماره ویژه 3, Pp 75-94 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	lateral loads innovative brbs perforated core geometrical parameters absorbed energy Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	lateral loads innovative brbs perforated core geometrical parameters absorbed energy Bridge engineering TG1-470 Building construction TH1-9745 Hashem Jahangir Mohammad Hasan Daneshvar Khorram M. Ghalehnovi Influence of geometric parameters on perforated core buckling restrained braces behavior
description	Buckling Restrained Braces (BRBs) are installed in buildings to control lateral displacements caused by seismic events. Although, conventional BRBs have various advantages comparing to ordinary bracing systems, their high weight and dimensions because of the restraining units is a dominant drawback. In this paper, a new developed type of BRB named perforated core buckling restrained brace is investigated which resolved conventional BRBs shortcoming. Its core consists of a perforated steel yielding plate which is guided and partially stabilized by the restraining unit. The core is mechanized to obtain two yielding lateral bands which are connected by several equidistant stabilizing bridges. At first part of the paper, the hysteretic behaviour of the tested braces and a large scale brace has been analysed and verified with an FEM model which considers the interaction between the core and the encasing member. The model reproduces the hysteretic response during the first cycles and the influence of friction on the axial strain distribution along the yielding core. In the second part, geometrical parameters such as number of holes and their section in the core of brace were studied and trough hysteretic behaviour, stress distribution, core deformation and its condition under ultimate loads, the optimized core is selected and suggested.
format	article
author	Hashem Jahangir Mohammad Hasan Daneshvar Khorram M. Ghalehnovi
author_facet	Hashem Jahangir Mohammad Hasan Daneshvar Khorram M. Ghalehnovi
author_sort	Hashem Jahangir
title	Influence of geometric parameters on perforated core buckling restrained braces behavior
title_short	Influence of geometric parameters on perforated core buckling restrained braces behavior
title_full	Influence of geometric parameters on perforated core buckling restrained braces behavior
title_fullStr	Influence of geometric parameters on perforated core buckling restrained braces behavior
title_full_unstemmed	Influence of geometric parameters on perforated core buckling restrained braces behavior
title_sort	influence of geometric parameters on perforated core buckling restrained braces behavior
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/490b5500b6e24b2c94c78d31ab795e4e
work_keys_str_mv	AT hashemjahangir influenceofgeometricparametersonperforatedcorebucklingrestrainedbracesbehavior AT mohammadhasandaneshvarkhorram influenceofgeometricparametersonperforatedcorebucklingrestrainedbracesbehavior AT mghalehnovi influenceofgeometricparametersonperforatedcorebucklingrestrainedbracesbehavior
_version_	1718441655843946496

Influence of geometric parameters on perforated core buckling restrained braces behavior

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