Investigating the behavior tall steel concentrically braced frames exposed to fire

Understanding the behavior of steel structures under fire loading is very important because many recent events indicate the vulnerability of steel structures to such a hazard. Extensive numerical and experimental studies have been conducted to investigate the behavior of different types of structura...

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Autores principales:	Rasul Kaffash, Abbas Karamodin
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2021
Materias:	fire sequential analysis fire resistance braced frames overall behavior Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/08ea6b9da249469a90086e4c198ebc72
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spelling	oai:doaj.org-article:08ea6b9da249469a90086e4c198ebc722021-11-08T15:54:39ZInvestigating the behavior tall steel concentrically braced frames exposed to fire2476-39772538-261610.22065/jsce.2019.182755.1839https://doaj.org/article/08ea6b9da249469a90086e4c198ebc722021-05-01T00:00:00Zhttps://www.jsce.ir/article_91208_1e57682a5a095cbcb3472ac6e366f882.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Understanding the behavior of steel structures under fire loading is very important because many recent events indicate the vulnerability of steel structures to such a hazard. Extensive numerical and experimental studies have been conducted to investigate the behavior of different types of structural steel elements individually, steel structure connection, and steel moment frames in fire conditions. However, the response of concentrically braced frames in fire conditions has not yet been investigated. This paper examines the global response and the local behavior of the concentrically braced frames under a series of uniform fire scenarios considering the heating and cooling phases at different levels of floors by numerical analysis of finite element method. The analyzes show that the buckling of the beams and braces is exposed to high temperatures due to the large compressive axial force due to lateral constraints to expansion. Also, the fire resistance of the braced frames is affected by the position of the fire. As with increasing gravity load at lower levels, the effect of P-Δ, which is an effective factor in the destruction of the structure, has increased and thus the fire scenario in the lower levels could potentially risk the early destruction of the structure Increase. The results of analyzes can help engineers understand the local and global responses of steel bracing frames under fire loading.Rasul KaffashAbbas KaramodinIranian Society of Structrual Engineering (ISSE)articlefiresequential analysisfire resistancebraced framesoverall behaviorBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 8, Iss 3, Pp 177-190 (2021)
institution	DOAJ
collection	DOAJ
language	FA
topic	fire sequential analysis fire resistance braced frames overall behavior Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	fire sequential analysis fire resistance braced frames overall behavior Bridge engineering TG1-470 Building construction TH1-9745 Rasul Kaffash Abbas Karamodin Investigating the behavior tall steel concentrically braced frames exposed to fire
description	Understanding the behavior of steel structures under fire loading is very important because many recent events indicate the vulnerability of steel structures to such a hazard. Extensive numerical and experimental studies have been conducted to investigate the behavior of different types of structural steel elements individually, steel structure connection, and steel moment frames in fire conditions. However, the response of concentrically braced frames in fire conditions has not yet been investigated. This paper examines the global response and the local behavior of the concentrically braced frames under a series of uniform fire scenarios considering the heating and cooling phases at different levels of floors by numerical analysis of finite element method. The analyzes show that the buckling of the beams and braces is exposed to high temperatures due to the large compressive axial force due to lateral constraints to expansion. Also, the fire resistance of the braced frames is affected by the position of the fire. As with increasing gravity load at lower levels, the effect of P-Δ, which is an effective factor in the destruction of the structure, has increased and thus the fire scenario in the lower levels could potentially risk the early destruction of the structure Increase. The results of analyzes can help engineers understand the local and global responses of steel bracing frames under fire loading.
format	article
author	Rasul Kaffash Abbas Karamodin
author_facet	Rasul Kaffash Abbas Karamodin
author_sort	Rasul Kaffash
title	Investigating the behavior tall steel concentrically braced frames exposed to fire
title_short	Investigating the behavior tall steel concentrically braced frames exposed to fire
title_full	Investigating the behavior tall steel concentrically braced frames exposed to fire
title_fullStr	Investigating the behavior tall steel concentrically braced frames exposed to fire
title_full_unstemmed	Investigating the behavior tall steel concentrically braced frames exposed to fire
title_sort	investigating the behavior tall steel concentrically braced frames exposed to fire
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2021
url	https://doaj.org/article/08ea6b9da249469a90086e4c198ebc72
work_keys_str_mv	AT rasulkaffash investigatingthebehaviortallsteelconcentricallybracedframesexposedtofire AT abbaskaramodin investigatingthebehaviortallsteelconcentricallybracedframesexposedtofire
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Investigating the behavior tall steel concentrically braced frames exposed to fire

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