Numerical investigation of the behaviour of bolted and welded top and seat angle connection in progressive collapse of steel structures

After failure of a column in structure by an abnormal loading, undesirable performance and damage of connections of the beams connected to the top of this column, can lead to the local failure of floor and in turn result in progressive collapse in the structure. Accordingly, the best method for reha...

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Autores principales:	Mohammad Ali Hadianfard, Mahboobe Namjoo
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	progressive collapse top and seat angle bolted connection welded connection catenary action column removal Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/054cd45d1510407f82e11ab4c13e4672
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id	oai:doaj.org-article:054cd45d1510407f82e11ab4c13e4672
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spelling	oai:doaj.org-article:054cd45d1510407f82e11ab4c13e46722021-11-08T15:52:34ZNumerical investigation of the behaviour of bolted and welded top and seat angle connection in progressive collapse of steel structures2476-39772538-261610.22065/jsce.2017.98340.1322https://doaj.org/article/054cd45d1510407f82e11ab4c13e46722019-06-01T00:00:00Zhttps://www.jsce.ir/article_53652_d1280c7a50b5267b314ed34d0c1f55fa.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616After failure of a column in structure by an abnormal loading, undesirable performance and damage of connections of the beams connected to the top of this column, can lead to the local failure of floor and in turn result in progressive collapse in the structure. Accordingly, the best method for rehabilitation of the structure against this incident is the strengthening of the connections. The strength and flexibility of the connections during the large rotations result in spreading the axial forces in beams and forming the catenary action. This action can greatly prevent structural failure due to the column removal. In this paper, the performance of prevalent bolted and welded top and seat angle steel connections is evaluated numerically. All parts of the connections are modeled in finite element software. The modeled structure is analyzed nonlinearly under the vertical displacement in the location of removed column, and its results have been verified with experimental results. In addition, the behavior, failure modes, how the catenary action develops and the effects of different parameters on connection behavior are investigated. The results indicated that bolted connections have better performance than welded connections.Also, in welded connections, increasing the thickness of the angles and increasing the length of the connected angle leg to column, improve the catenary action and the resistance of the connections against progressive collapse. But adding the stiffener plate in the middle of the seat angle does not increase the connection capacity in all cases.Mohammad Ali HadianfardMahboobe NamjooIranian Society of Structrual Engineering (ISSE)articleprogressive collapsetop and seat anglebolted connectionwelded connectioncatenary actioncolumn removalBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 6, Iss شماره ویژه 1, Pp 5-26 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	progressive collapse top and seat angle bolted connection welded connection catenary action column removal Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	progressive collapse top and seat angle bolted connection welded connection catenary action column removal Bridge engineering TG1-470 Building construction TH1-9745 Mohammad Ali Hadianfard Mahboobe Namjoo Numerical investigation of the behaviour of bolted and welded top and seat angle connection in progressive collapse of steel structures
description	After failure of a column in structure by an abnormal loading, undesirable performance and damage of connections of the beams connected to the top of this column, can lead to the local failure of floor and in turn result in progressive collapse in the structure. Accordingly, the best method for rehabilitation of the structure against this incident is the strengthening of the connections. The strength and flexibility of the connections during the large rotations result in spreading the axial forces in beams and forming the catenary action. This action can greatly prevent structural failure due to the column removal. In this paper, the performance of prevalent bolted and welded top and seat angle steel connections is evaluated numerically. All parts of the connections are modeled in finite element software. The modeled structure is analyzed nonlinearly under the vertical displacement in the location of removed column, and its results have been verified with experimental results. In addition, the behavior, failure modes, how the catenary action develops and the effects of different parameters on connection behavior are investigated. The results indicated that bolted connections have better performance than welded connections.Also, in welded connections, increasing the thickness of the angles and increasing the length of the connected angle leg to column, improve the catenary action and the resistance of the connections against progressive collapse. But adding the stiffener plate in the middle of the seat angle does not increase the connection capacity in all cases.
format	article
author	Mohammad Ali Hadianfard Mahboobe Namjoo
author_facet	Mohammad Ali Hadianfard Mahboobe Namjoo
author_sort	Mohammad Ali Hadianfard
title	Numerical investigation of the behaviour of bolted and welded top and seat angle connection in progressive collapse of steel structures
title_short	Numerical investigation of the behaviour of bolted and welded top and seat angle connection in progressive collapse of steel structures
title_full	Numerical investigation of the behaviour of bolted and welded top and seat angle connection in progressive collapse of steel structures
title_fullStr	Numerical investigation of the behaviour of bolted and welded top and seat angle connection in progressive collapse of steel structures
title_full_unstemmed	Numerical investigation of the behaviour of bolted and welded top and seat angle connection in progressive collapse of steel structures
title_sort	numerical investigation of the behaviour of bolted and welded top and seat angle connection in progressive collapse of steel structures
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/054cd45d1510407f82e11ab4c13e4672
work_keys_str_mv	AT mohammadalihadianfard numericalinvestigationofthebehaviourofboltedandweldedtopandseatangleconnectioninprogressivecollapseofsteelstructures AT mahboobenamjoo numericalinvestigationofthebehaviourofboltedandweldedtopandseatangleconnectioninprogressivecollapseofsteelstructures
_version_	1718441631509643264

Numerical investigation of the behaviour of bolted and welded top and seat angle connection in progressive collapse of steel structures

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