Influence of increasing differential settlement under columns on a RC frame response considering different support conditions

Natural hazards and human activities bring about overall or local ground subsidence. Predicting the effects of large differential settlement on response of structural frames, especially in congested urban areas, is a main issue in design process as inadvertence can lead to irrecoverable human and fi...

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Autores principales:	Alireza Pachenari, Elahe Pirayande, Zahra Pachenari
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2019
Materias:	differential settlement rc moment frame nonlinear static analysis load redistribution plastic hinges Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/61a2c1d1dfa44326a935a2b683373ec2
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spelling	oai:doaj.org-article:61a2c1d1dfa44326a935a2b683373ec22021-11-08T15:52:35ZInfluence of increasing differential settlement under columns on a RC frame response considering different support conditions2476-39772538-261610.22065/jsce.2018.97715.1319https://doaj.org/article/61a2c1d1dfa44326a935a2b683373ec22019-06-01T00:00:00Zhttps://www.jsce.ir/article_55213_b1ebfb92e40469f8a573df0388c5757a.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Natural hazards and human activities bring about overall or local ground subsidence. Predicting the effects of large differential settlement on response of structural frames, especially in congested urban areas, is a main issue in design process as inadvertence can lead to irrecoverable human and financial losses. In order to better understand the consequences of the subsidence phenomenon on the superstructure, a three dimensional reinforced concrete (RC) moment frame designed according to the current Iranian codes of practice is analyzed due to six separate nonlinear analysis cases considering three locations for the increasing differential settlements (under corner, exterior, and interior columns) as well as two support conditions (fixed and flexible); Various results including change in pattern of bridging beam bending moments, axial force redistribution in columns, and also maximum tolerable elastic and inelastic settlements are evaluated. Based on the findings of the numerical models, although cases with the settlement imposed under an interior column have the least vertical downward displacement at formation of first plastic hinge in a beam compared to corresponding cases, the highest capacity to bear differential settlement occurs due to one of the cases of a corner column location. Moreover, formation of plastic hinges and redistribution of axial forces in first-story columns are highly affected by the modeled support conditions.Alireza PachenariElahe PirayandeZahra PachenariIranian Society of Structrual Engineering (ISSE)articledifferential settlementrc moment framenonlinear static analysisload redistributionplastic hingesBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 6, Iss شماره ویژه 1, Pp 173-186 (2019)
institution	DOAJ
collection	DOAJ
language	FA
topic	differential settlement rc moment frame nonlinear static analysis load redistribution plastic hinges Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	differential settlement rc moment frame nonlinear static analysis load redistribution plastic hinges Bridge engineering TG1-470 Building construction TH1-9745 Alireza Pachenari Elahe Pirayande Zahra Pachenari Influence of increasing differential settlement under columns on a RC frame response considering different support conditions
description	Natural hazards and human activities bring about overall or local ground subsidence. Predicting the effects of large differential settlement on response of structural frames, especially in congested urban areas, is a main issue in design process as inadvertence can lead to irrecoverable human and financial losses. In order to better understand the consequences of the subsidence phenomenon on the superstructure, a three dimensional reinforced concrete (RC) moment frame designed according to the current Iranian codes of practice is analyzed due to six separate nonlinear analysis cases considering three locations for the increasing differential settlements (under corner, exterior, and interior columns) as well as two support conditions (fixed and flexible); Various results including change in pattern of bridging beam bending moments, axial force redistribution in columns, and also maximum tolerable elastic and inelastic settlements are evaluated. Based on the findings of the numerical models, although cases with the settlement imposed under an interior column have the least vertical downward displacement at formation of first plastic hinge in a beam compared to corresponding cases, the highest capacity to bear differential settlement occurs due to one of the cases of a corner column location. Moreover, formation of plastic hinges and redistribution of axial forces in first-story columns are highly affected by the modeled support conditions.
format	article
author	Alireza Pachenari Elahe Pirayande Zahra Pachenari
author_facet	Alireza Pachenari Elahe Pirayande Zahra Pachenari
author_sort	Alireza Pachenari
title	Influence of increasing differential settlement under columns on a RC frame response considering different support conditions
title_short	Influence of increasing differential settlement under columns on a RC frame response considering different support conditions
title_full	Influence of increasing differential settlement under columns on a RC frame response considering different support conditions
title_fullStr	Influence of increasing differential settlement under columns on a RC frame response considering different support conditions
title_full_unstemmed	Influence of increasing differential settlement under columns on a RC frame response considering different support conditions
title_sort	influence of increasing differential settlement under columns on a rc frame response considering different support conditions
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2019
url	https://doaj.org/article/61a2c1d1dfa44326a935a2b683373ec2
work_keys_str_mv	AT alirezapachenari influenceofincreasingdifferentialsettlementundercolumnsonarcframeresponseconsideringdifferentsupportconditions AT elahepirayande influenceofincreasingdifferentialsettlementundercolumnsonarcframeresponseconsideringdifferentsupportconditions AT zahrapachenari influenceofincreasingdifferentialsettlementundercolumnsonarcframeresponseconsideringdifferentsupportconditions
_version_	1718441667261890560

Influence of increasing differential settlement under columns on a RC frame response considering different support conditions

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