Effect of friction between the steel core and concrete on the seismic performance of Buckling Resistant Brace Frames

Structures with Buckling Resistant Braced Frames (BRBF) have two significant properties of energy dissipation and lateral stiffness during an earthquake. BRBF consists of steel core surrounded by a hollow steel section, coated with a low-friction material, and then grouted with a specialized mortar....

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Autores principales:	Mahmoud reza shiravand, Aidin Shamsi, Amir Khorrami nejad
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	brbf nonlinear dynamic analysis energy dissipation un-bounded material friction coefficient Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/c652cfa707f94dfc8e9eedaf739b7eb1
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spelling	oai:doaj.org-article:c652cfa707f94dfc8e9eedaf739b7eb12021-11-08T15:50:45ZEffect of friction between the steel core and concrete on the seismic performance of Buckling Resistant Brace Frames2476-39772538-261610.22065/jsce.2017.67341.1002https://doaj.org/article/c652cfa707f94dfc8e9eedaf739b7eb12019-02-01T00:00:00Zhttps://www.jsce.ir/article_87073_9416a0415af95ac1eefd9199ce3027f1.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Structures with Buckling Resistant Braced Frames (BRBF) have two significant properties of energy dissipation and lateral stiffness during an earthquake. BRBF consists of steel core surrounded by a hollow steel section, coated with a low-friction material, and then grouted with a specialized mortar. The encasing and mortar Prohibit the steel core from buckling when in compression, while the coating prevents axial load from being transferred to the mortar, thus preventing strength loss and allowing for better symmetric cyclic performance .Using BRBF as a fuse element in seismic design of structures leads to reduction of structure’s weight and consequently post-earthquake repair costs. One of the main constituents of BRBF system is the unbounded material between steel core and mortar (concrete) that should not have high friction coefficient (μ). This research is focused on the effect of friction coefficient of unbounded material on the seismic behaviour of BRBF within a range of μ=0 to μ=0.3. The results showed that reduction of the friction coefficient results in a greater ductility and energy dissipation. Also, the number of load cycles applied on the structures till the Occurrence of failure, have been increased by decrease in the friction coefficient. The dissipated energy of BRBF system in the case of various friction coefficients is computed about 50%, 62%, 63%, 65%, 71% and 90%, respectively, for μ=0.3, μ=0.2, μ=0.1, μ=0.05, μ=0.025 & μ=0.01 compared to that of low friction coefficient equal to μ=0.001. It can be deduced from these paper that by reducing the friction coefficient of the unbounded material, the characteristics such as energy dissipation and ductility will be enhanced and consequently the seismic performance of the system will be improved.Mahmoud reza shiravandAidin ShamsiAmir Khorrami nejadIranian Society of Structrual Engineering (ISSE)articlebrbfnonlinear dynamic analysisenergy dissipationun-bounded materialfriction coefficientBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 5, Iss 4, Pp 5-22 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	brbf nonlinear dynamic analysis energy dissipation un-bounded material friction coefficient Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	brbf nonlinear dynamic analysis energy dissipation un-bounded material friction coefficient Bridge engineering TG1-470 Building construction TH1-9745 Mahmoud reza shiravand Aidin Shamsi Amir Khorrami nejad Effect of friction between the steel core and concrete on the seismic performance of Buckling Resistant Brace Frames
description	Structures with Buckling Resistant Braced Frames (BRBF) have two significant properties of energy dissipation and lateral stiffness during an earthquake. BRBF consists of steel core surrounded by a hollow steel section, coated with a low-friction material, and then grouted with a specialized mortar. The encasing and mortar Prohibit the steel core from buckling when in compression, while the coating prevents axial load from being transferred to the mortar, thus preventing strength loss and allowing for better symmetric cyclic performance .Using BRBF as a fuse element in seismic design of structures leads to reduction of structure’s weight and consequently post-earthquake repair costs. One of the main constituents of BRBF system is the unbounded material between steel core and mortar (concrete) that should not have high friction coefficient (μ). This research is focused on the effect of friction coefficient of unbounded material on the seismic behaviour of BRBF within a range of μ=0 to μ=0.3. The results showed that reduction of the friction coefficient results in a greater ductility and energy dissipation. Also, the number of load cycles applied on the structures till the Occurrence of failure, have been increased by decrease in the friction coefficient. The dissipated energy of BRBF system in the case of various friction coefficients is computed about 50%, 62%, 63%, 65%, 71% and 90%, respectively, for μ=0.3, μ=0.2, μ=0.1, μ=0.05, μ=0.025 & μ=0.01 compared to that of low friction coefficient equal to μ=0.001. It can be deduced from these paper that by reducing the friction coefficient of the unbounded material, the characteristics such as energy dissipation and ductility will be enhanced and consequently the seismic performance of the system will be improved.
format	article
author	Mahmoud reza shiravand Aidin Shamsi Amir Khorrami nejad
author_facet	Mahmoud reza shiravand Aidin Shamsi Amir Khorrami nejad
author_sort	Mahmoud reza shiravand
title	Effect of friction between the steel core and concrete on the seismic performance of Buckling Resistant Brace Frames
title_short	Effect of friction between the steel core and concrete on the seismic performance of Buckling Resistant Brace Frames
title_full	Effect of friction between the steel core and concrete on the seismic performance of Buckling Resistant Brace Frames
title_fullStr	Effect of friction between the steel core and concrete on the seismic performance of Buckling Resistant Brace Frames
title_full_unstemmed	Effect of friction between the steel core and concrete on the seismic performance of Buckling Resistant Brace Frames
title_sort	effect of friction between the steel core and concrete on the seismic performance of buckling resistant brace frames
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/c652cfa707f94dfc8e9eedaf739b7eb1
work_keys_str_mv	AT mahmoudrezashiravand effectoffrictionbetweenthesteelcoreandconcreteontheseismicperformanceofbucklingresistantbraceframes AT aidinshamsi effectoffrictionbetweenthesteelcoreandconcreteontheseismicperformanceofbucklingresistantbraceframes AT amirkhorraminejad effectoffrictionbetweenthesteelcoreandconcreteontheseismicperformanceofbucklingresistantbraceframes
_version_	1718441700878188544

Effect of friction between the steel core and concrete on the seismic performance of Buckling Resistant Brace Frames

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