Experimental and Numerical Study of Buckling Restrained Bracing Behavior with Combined Steel and Polyamide Sheath

One of the most widely used system resisting against lateral loads in the design and retrofit of concrete and steel structures is steel bracing. One of the methods developed by the researchers is the use of confining members to prevent general buckling of bracing and reducing the effects of it. In t...

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Autores principales:	Madjid Gholhaki, Ghasem Pachideh, Rahim Lashgari, Omid Rezayfar
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	buckling restrained bracing steel sheath polyamide sheath distance of core from sheath strenght Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/3e2e8b9f258c415580d8e56fce8b1f17
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spelling	oai:doaj.org-article:3e2e8b9f258c415580d8e56fce8b1f172021-11-08T15:51:06ZExperimental and Numerical Study of Buckling Restrained Bracing Behavior with Combined Steel and Polyamide Sheath2476-39772538-261610.22065/jsce.2017.86109.1190https://doaj.org/article/3e2e8b9f258c415580d8e56fce8b1f172019-02-01T00:00:00Zhttps://www.jsce.ir/article_51248_a95c0f016a386b196bc22d9ea1077092.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616One of the most widely used system resisting against lateral loads in the design and retrofit of concrete and steel structures is steel bracing. One of the methods developed by the researchers is the use of confining members to prevent general buckling of bracing and reducing the effects of it. In this bracing system known as "Buckling Restrained Bracing, the axial load is born by bracing core and by using surrounding sheath, its overall buckling can be avoided. In this paper, experimental and numerical study of the effects caused by steel type of core of the distance of core from sheath on buckling restrained bracing was studied. Experimental models consist of six bracings with core of conventional ST37 and ST37-n steel (softened at a temperature of 1000 degrees by O'Neill method), in which the distance of core from sheath is zero, two, and three mm. Experimental results show that the use of softer steel with lower yield stress and with equal thickness in the core reduces bearing capacity and resistance or strength of bracing. However, bracing in smaller displacements started to energy waste. Increasing distance of the core from sheath also reduces bearing capacity and energy dissipation of bracing. In addition, increasing the distance of core from sheath to more than 2 mm causes the loss of symmetry and stability in hysteresis behavior of bracing and distortions resulting from local buckling in the bracing in pressure were intensified. Polyamide filler material had good resistance against pressure from the core and no certain damage was seen in it. Therefore, due to having less specific gravity, it could be a good alternative to concrete and reduce the overall weight of the bracing.Madjid GholhakiGhasem PachidehRahim LashgariOmid RezayfarIranian Society of Structrual Engineering (ISSE)articlebuckling restrained bracingsteel sheathpolyamide sheathdistance of core from sheathstrenghtBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 5, Iss شماره ویژه 4, Pp 88-108 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	buckling restrained bracing steel sheath polyamide sheath distance of core from sheath strenght Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	buckling restrained bracing steel sheath polyamide sheath distance of core from sheath strenght Bridge engineering TG1-470 Building construction TH1-9745 Madjid Gholhaki Ghasem Pachideh Rahim Lashgari Omid Rezayfar Experimental and Numerical Study of Buckling Restrained Bracing Behavior with Combined Steel and Polyamide Sheath
description	One of the most widely used system resisting against lateral loads in the design and retrofit of concrete and steel structures is steel bracing. One of the methods developed by the researchers is the use of confining members to prevent general buckling of bracing and reducing the effects of it. In this bracing system known as "Buckling Restrained Bracing, the axial load is born by bracing core and by using surrounding sheath, its overall buckling can be avoided. In this paper, experimental and numerical study of the effects caused by steel type of core of the distance of core from sheath on buckling restrained bracing was studied. Experimental models consist of six bracings with core of conventional ST37 and ST37-n steel (softened at a temperature of 1000 degrees by O'Neill method), in which the distance of core from sheath is zero, two, and three mm. Experimental results show that the use of softer steel with lower yield stress and with equal thickness in the core reduces bearing capacity and resistance or strength of bracing. However, bracing in smaller displacements started to energy waste. Increasing distance of the core from sheath also reduces bearing capacity and energy dissipation of bracing. In addition, increasing the distance of core from sheath to more than 2 mm causes the loss of symmetry and stability in hysteresis behavior of bracing and distortions resulting from local buckling in the bracing in pressure were intensified. Polyamide filler material had good resistance against pressure from the core and no certain damage was seen in it. Therefore, due to having less specific gravity, it could be a good alternative to concrete and reduce the overall weight of the bracing.
format	article
author	Madjid Gholhaki Ghasem Pachideh Rahim Lashgari Omid Rezayfar
author_facet	Madjid Gholhaki Ghasem Pachideh Rahim Lashgari Omid Rezayfar
author_sort	Madjid Gholhaki
title	Experimental and Numerical Study of Buckling Restrained Bracing Behavior with Combined Steel and Polyamide Sheath
title_short	Experimental and Numerical Study of Buckling Restrained Bracing Behavior with Combined Steel and Polyamide Sheath
title_full	Experimental and Numerical Study of Buckling Restrained Bracing Behavior with Combined Steel and Polyamide Sheath
title_fullStr	Experimental and Numerical Study of Buckling Restrained Bracing Behavior with Combined Steel and Polyamide Sheath
title_full_unstemmed	Experimental and Numerical Study of Buckling Restrained Bracing Behavior with Combined Steel and Polyamide Sheath
title_sort	experimental and numerical study of buckling restrained bracing behavior with combined steel and polyamide sheath
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/3e2e8b9f258c415580d8e56fce8b1f17
work_keys_str_mv	AT madjidgholhaki experimentalandnumericalstudyofbucklingrestrainedbracingbehaviorwithcombinedsteelandpolyamidesheath AT ghasempachideh experimentalandnumericalstudyofbucklingrestrainedbracingbehaviorwithcombinedsteelandpolyamidesheath AT rahimlashgari experimentalandnumericalstudyofbucklingrestrainedbracingbehaviorwithcombinedsteelandpolyamidesheath AT omidrezayfar experimentalandnumericalstudyofbucklingrestrainedbracingbehaviorwithcombinedsteelandpolyamidesheath
_version_	1718441652098433024

Experimental and Numerical Study of Buckling Restrained Bracing Behavior with Combined Steel and Polyamide Sheath

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