Experimental Evaluation of an Innovative Buckling-Restrained Fuse for Concentrically Braced Frames under Cyclic Loading

Concentrically braced frames (CBFs) have become prevalent as a lateral load resisting system due to their rigidity, low lateral displacement and ease of implementation over the last three decades. These advantages encourage the increasing utilization of this system in the construction industry. Desp...

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Autores principales:	Masoud Mohammadi, Mohammad Ali Kafi, Ali Kheyroddin, Hamid Reza Ronagh
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2021
Materias:	steel structure braced frames structural fuse ductility hysteretic damper buckling-restrained braces Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/4f95fba4f3a94219a61bc1ba3edf9270
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id	oai:doaj.org-article:4f95fba4f3a94219a61bc1ba3edf9270
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spelling	oai:doaj.org-article:4f95fba4f3a94219a61bc1ba3edf92702021-11-08T15:54:49ZExperimental Evaluation of an Innovative Buckling-Restrained Fuse for Concentrically Braced Frames under Cyclic Loading2476-39772538-261610.22065/jsce.2019.182841.1838https://doaj.org/article/4f95fba4f3a94219a61bc1ba3edf92702021-06-01T00:00:00Zhttps://www.jsce.ir/article_88373_a5a0c009d489a52ab11364dbeb10865d.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Concentrically braced frames (CBFs) have become prevalent as a lateral load resisting system due to their rigidity, low lateral displacement and ease of implementation over the last three decades. These advantages encourage the increasing utilization of this system in the construction industry. Despite the advantages of CBFs, the lack of ductility and buckling of the bracing element before yielding is the main disadvantage this lateral system. In the last three decades, studies have become focused on the ductility and energy dissipation of the CBFs that were modified in terms of using dampers and fuse segments. The current study aims to presents an innovative Composite Buckling Restrained Fuse (CBRF) to be used as a bracing segment. CBRF with relatively small dimensions is an improvement on Reduced Length Buckling Restrained Brace (RL-BRBs) as a hysteretic damper with different performance in tension and compression. Extra tensile elements in a novel configuration were used to compensate for the limitation of tensile strength that exists in bracing elements containing ordinary fuse segments. Here, some key design parameters of CBRF such as length and cross-sectional area of the core are discussed theoretically. Two specimens were designed and tested under cyclic loads. Moreover, the hysteretic response of the specimens was evaluated to calculate their strength adjustment parameters. The results indicate that the proposed CBRF has a ductile behavior with an average strain of 5% and high energy absorption capacity along with sufficient tensile strength.Masoud MohammadiMohammad Ali KafiAli KheyroddinHamid Reza RonaghIranian Society of Structrual Engineering (ISSE)articlesteel structurebraced framesstructural fuseductilityhysteretic damperbuckling-restrained bracesBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 8, Iss 4, Pp 124-140 (2021)
institution	DOAJ
collection	DOAJ
language	FA
topic	steel structure braced frames structural fuse ductility hysteretic damper buckling-restrained braces Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	steel structure braced frames structural fuse ductility hysteretic damper buckling-restrained braces Bridge engineering TG1-470 Building construction TH1-9745 Masoud Mohammadi Mohammad Ali Kafi Ali Kheyroddin Hamid Reza Ronagh Experimental Evaluation of an Innovative Buckling-Restrained Fuse for Concentrically Braced Frames under Cyclic Loading
description	Concentrically braced frames (CBFs) have become prevalent as a lateral load resisting system due to their rigidity, low lateral displacement and ease of implementation over the last three decades. These advantages encourage the increasing utilization of this system in the construction industry. Despite the advantages of CBFs, the lack of ductility and buckling of the bracing element before yielding is the main disadvantage this lateral system. In the last three decades, studies have become focused on the ductility and energy dissipation of the CBFs that were modified in terms of using dampers and fuse segments. The current study aims to presents an innovative Composite Buckling Restrained Fuse (CBRF) to be used as a bracing segment. CBRF with relatively small dimensions is an improvement on Reduced Length Buckling Restrained Brace (RL-BRBs) as a hysteretic damper with different performance in tension and compression. Extra tensile elements in a novel configuration were used to compensate for the limitation of tensile strength that exists in bracing elements containing ordinary fuse segments. Here, some key design parameters of CBRF such as length and cross-sectional area of the core are discussed theoretically. Two specimens were designed and tested under cyclic loads. Moreover, the hysteretic response of the specimens was evaluated to calculate their strength adjustment parameters. The results indicate that the proposed CBRF has a ductile behavior with an average strain of 5% and high energy absorption capacity along with sufficient tensile strength.
format	article
author	Masoud Mohammadi Mohammad Ali Kafi Ali Kheyroddin Hamid Reza Ronagh
author_facet	Masoud Mohammadi Mohammad Ali Kafi Ali Kheyroddin Hamid Reza Ronagh
author_sort	Masoud Mohammadi
title	Experimental Evaluation of an Innovative Buckling-Restrained Fuse for Concentrically Braced Frames under Cyclic Loading
title_short	Experimental Evaluation of an Innovative Buckling-Restrained Fuse for Concentrically Braced Frames under Cyclic Loading
title_full	Experimental Evaluation of an Innovative Buckling-Restrained Fuse for Concentrically Braced Frames under Cyclic Loading
title_fullStr	Experimental Evaluation of an Innovative Buckling-Restrained Fuse for Concentrically Braced Frames under Cyclic Loading
title_full_unstemmed	Experimental Evaluation of an Innovative Buckling-Restrained Fuse for Concentrically Braced Frames under Cyclic Loading
title_sort	experimental evaluation of an innovative buckling-restrained fuse for concentrically braced frames under cyclic loading
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2021
url	https://doaj.org/article/4f95fba4f3a94219a61bc1ba3edf9270
work_keys_str_mv	AT masoudmohammadi experimentalevaluationofaninnovativebucklingrestrainedfuseforconcentricallybracedframesundercyclicloading AT mohammadalikafi experimentalevaluationofaninnovativebucklingrestrainedfuseforconcentricallybracedframesundercyclicloading AT alikheyroddin experimentalevaluationofaninnovativebucklingrestrainedfuseforconcentricallybracedframesundercyclicloading AT hamidrezaronagh experimentalevaluationofaninnovativebucklingrestrainedfuseforconcentricallybracedframesundercyclicloading
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Experimental Evaluation of an Innovative Buckling-Restrained Fuse for Concentrically Braced Frames under Cyclic Loading

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