Evaluation of end clearance and using stiffeners on gusset plate effect on the compressive performance of diagonal bracing systems

The braced frame is used in steel structures to confront lateral loads. In Iran, braced frames, especially concentrically braced frames are more commonly used due to their high levels of rigidity and ease and speed of construction. The bracing member of this system bears considerable amounts of load...

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Autores principales:	Mussa Mahmoudi Sahebi, Arash Zarezadeh, Aliraza Shirpour
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2018
Materias:	gusset plate stiffener end-connection effective length coefficient diagonal bracing end clearance Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/aede789903b14e318f00d5083670e03f
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spelling	oai:doaj.org-article:aede789903b14e318f00d5083670e03f2021-11-08T15:50:37ZEvaluation of end clearance and using stiffeners on gusset plate effect on the compressive performance of diagonal bracing systems2476-39772538-261610.22065/jsce.2017.85865.1171https://doaj.org/article/aede789903b14e318f00d5083670e03f2018-10-01T00:00:00Zhttps://www.jsce.ir/article_50147_31c28aa6a13db8df972b5e74d58f61f8.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616The braced frame is used in steel structures to confront lateral loads. In Iran, braced frames, especially concentrically braced frames are more commonly used due to their high levels of rigidity and ease and speed of construction. The bracing member of this system bears considerable amounts of load, and thus it needs to be properly connected to the main frame members to display a satisfactory performance. Gusset plates are used to implement such connections. Due to the need for ductility of concentrically braced frames, researchers have conducted extensive research on factors influencing ductility of these structures and especially their connections. The brace end clearance is one of the factors influencing this parameter. It is also possible to influence the connection and frame performances by using stiffeners on gusset plates. This connection is designed to either prevent problems caused to the end-connection through free buckling of a member or reinforcing the gusset plate to reduce damages caused by possible buckling of a member at the connection location. In this research, 5 one-span one-story frames with diagonal braces were modeled in ABAQUS finite element method software. The effects of brace end clearance and effects of stiffeners on gusset plates were studied in the first 2 models and the other 3 models, respectively. First, a buckling analysis was carried out to study brace critical load and the brace effective length coefficient. Afterwards, considering the initial imperfection determined by buckling analysis, the samples were exposed to post-buckling nonlinear analysis and results of the base shear-displacement and stress-strain curves were compared. Comparison results revealed that by considering the brace end clearance recommended by reputable building codes it is possible to increase ductility and prevent early failure of corner joint plates. Proper use of stiffeners also may improve performance of lateral connections and the braced frame.Mussa Mahmoudi SahebiArash ZarezadehAliraza ShirpourIranian Society of Structrual Engineering (ISSE)articlegusset plate stiffenerend-connectioneffective length coefficientdiagonal bracingend clearanceBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 5, Iss 3, Pp 160-171 (2018)
institution	DOAJ
collection	DOAJ
language	FA
topic	gusset plate stiffener end-connection effective length coefficient diagonal bracing end clearance Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	gusset plate stiffener end-connection effective length coefficient diagonal bracing end clearance Bridge engineering TG1-470 Building construction TH1-9745 Mussa Mahmoudi Sahebi Arash Zarezadeh Aliraza Shirpour Evaluation of end clearance and using stiffeners on gusset plate effect on the compressive performance of diagonal bracing systems
description	The braced frame is used in steel structures to confront lateral loads. In Iran, braced frames, especially concentrically braced frames are more commonly used due to their high levels of rigidity and ease and speed of construction. The bracing member of this system bears considerable amounts of load, and thus it needs to be properly connected to the main frame members to display a satisfactory performance. Gusset plates are used to implement such connections. Due to the need for ductility of concentrically braced frames, researchers have conducted extensive research on factors influencing ductility of these structures and especially their connections. The brace end clearance is one of the factors influencing this parameter. It is also possible to influence the connection and frame performances by using stiffeners on gusset plates. This connection is designed to either prevent problems caused to the end-connection through free buckling of a member or reinforcing the gusset plate to reduce damages caused by possible buckling of a member at the connection location. In this research, 5 one-span one-story frames with diagonal braces were modeled in ABAQUS finite element method software. The effects of brace end clearance and effects of stiffeners on gusset plates were studied in the first 2 models and the other 3 models, respectively. First, a buckling analysis was carried out to study brace critical load and the brace effective length coefficient. Afterwards, considering the initial imperfection determined by buckling analysis, the samples were exposed to post-buckling nonlinear analysis and results of the base shear-displacement and stress-strain curves were compared. Comparison results revealed that by considering the brace end clearance recommended by reputable building codes it is possible to increase ductility and prevent early failure of corner joint plates. Proper use of stiffeners also may improve performance of lateral connections and the braced frame.
format	article
author	Mussa Mahmoudi Sahebi Arash Zarezadeh Aliraza Shirpour
author_facet	Mussa Mahmoudi Sahebi Arash Zarezadeh Aliraza Shirpour
author_sort	Mussa Mahmoudi Sahebi
title	Evaluation of end clearance and using stiffeners on gusset plate effect on the compressive performance of diagonal bracing systems
title_short	Evaluation of end clearance and using stiffeners on gusset plate effect on the compressive performance of diagonal bracing systems
title_full	Evaluation of end clearance and using stiffeners on gusset plate effect on the compressive performance of diagonal bracing systems
title_fullStr	Evaluation of end clearance and using stiffeners on gusset plate effect on the compressive performance of diagonal bracing systems
title_full_unstemmed	Evaluation of end clearance and using stiffeners on gusset plate effect on the compressive performance of diagonal bracing systems
title_sort	evaluation of end clearance and using stiffeners on gusset plate effect on the compressive performance of diagonal bracing systems
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2018
url	https://doaj.org/article/aede789903b14e318f00d5083670e03f
work_keys_str_mv	AT mussamahmoudisahebi evaluationofendclearanceandusingstiffenersongussetplateeffectonthecompressiveperformanceofdiagonalbracingsystems AT arashzarezadeh evaluationofendclearanceandusingstiffenersongussetplateeffectonthecompressiveperformanceofdiagonalbracingsystems AT alirazashirpour evaluationofendclearanceandusingstiffenersongussetplateeffectonthecompressiveperformanceofdiagonalbracingsystems
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Evaluation of end clearance and using stiffeners on gusset plate effect on the compressive performance of diagonal bracing systems

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