Experimental research on the critical temperature of compressed steel elements with restrained thermal elongation

Detalhes bibliográficos
Autor(a) principal: Rodrigues, J. P. Correia
Data de Publicação: 2000
Outros Autores: Neves, I. Cabrita, Valente, J. C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/4040
https://doi.org/10.1016/S0379-7112(00)00018-7
Resumo: In real structures, the loading conditions of steel elements subjected to the action of a localized fire change with time, if their axial elongation is restrained. The mechanical action on these elements has a major influence on their deformation, which in turn influences the magnitude of the interaction forces between the heated elements and the cold structure. The stiffness of the structure to which compressed elements belong has a main influence on the evolution of their axial force, and subsequently on their critical temperature and on their fire resistance. This paper describes the experimental model used in the Laboratory for Structures and Strength of Materials of the Department for Civil Engineering of Instituto Superior Técnico (IST), Lisbon, Portugal, to study the critical temperature of compressed steel elements with restrained thermal elongation. A total of 168 tests on hinged bars were performed. Four different slenderness values, two eccentricities of the compression load and six levels of restraint to the axial elongation were tested. The test results and the results of a computer simulation using a finite element program show that neglecting the effect of thermal axial restraint may result in overestimation of the fire resistance of columns.
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spelling Experimental research on the critical temperature of compressed steel elements with restrained thermal elongationIn real structures, the loading conditions of steel elements subjected to the action of a localized fire change with time, if their axial elongation is restrained. The mechanical action on these elements has a major influence on their deformation, which in turn influences the magnitude of the interaction forces between the heated elements and the cold structure. The stiffness of the structure to which compressed elements belong has a main influence on the evolution of their axial force, and subsequently on their critical temperature and on their fire resistance. This paper describes the experimental model used in the Laboratory for Structures and Strength of Materials of the Department for Civil Engineering of Instituto Superior Técnico (IST), Lisbon, Portugal, to study the critical temperature of compressed steel elements with restrained thermal elongation. A total of 168 tests on hinged bars were performed. Four different slenderness values, two eccentricities of the compression load and six levels of restraint to the axial elongation were tested. The test results and the results of a computer simulation using a finite element program show that neglecting the effect of thermal axial restraint may result in overestimation of the fire resistance of columns.http://www.sciencedirect.com/science/article/B6V37-40T9HGY-1/1/8d1fd6f816a9426d413e1633f7ec353a2000info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4040http://hdl.handle.net/10316/4040https://doi.org/10.1016/S0379-7112(00)00018-7engFire Safety Journal. 35:2 (2000) 77-98Rodrigues, J. P. CorreiaNeves, I. CabritaValente, J. C.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T16:59:51Zoai:estudogeral.uc.pt:10316/4040Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:57:10.308087Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Experimental research on the critical temperature of compressed steel elements with restrained thermal elongation
title Experimental research on the critical temperature of compressed steel elements with restrained thermal elongation
spellingShingle Experimental research on the critical temperature of compressed steel elements with restrained thermal elongation
Rodrigues, J. P. Correia
title_short Experimental research on the critical temperature of compressed steel elements with restrained thermal elongation
title_full Experimental research on the critical temperature of compressed steel elements with restrained thermal elongation
title_fullStr Experimental research on the critical temperature of compressed steel elements with restrained thermal elongation
title_full_unstemmed Experimental research on the critical temperature of compressed steel elements with restrained thermal elongation
title_sort Experimental research on the critical temperature of compressed steel elements with restrained thermal elongation
author Rodrigues, J. P. Correia
author_facet Rodrigues, J. P. Correia
Neves, I. Cabrita
Valente, J. C.
author_role author
author2 Neves, I. Cabrita
Valente, J. C.
author2_role author
author
dc.contributor.author.fl_str_mv Rodrigues, J. P. Correia
Neves, I. Cabrita
Valente, J. C.
description In real structures, the loading conditions of steel elements subjected to the action of a localized fire change with time, if their axial elongation is restrained. The mechanical action on these elements has a major influence on their deformation, which in turn influences the magnitude of the interaction forces between the heated elements and the cold structure. The stiffness of the structure to which compressed elements belong has a main influence on the evolution of their axial force, and subsequently on their critical temperature and on their fire resistance. This paper describes the experimental model used in the Laboratory for Structures and Strength of Materials of the Department for Civil Engineering of Instituto Superior Técnico (IST), Lisbon, Portugal, to study the critical temperature of compressed steel elements with restrained thermal elongation. A total of 168 tests on hinged bars were performed. Four different slenderness values, two eccentricities of the compression load and six levels of restraint to the axial elongation were tested. The test results and the results of a computer simulation using a finite element program show that neglecting the effect of thermal axial restraint may result in overestimation of the fire resistance of columns.
publishDate 2000
dc.date.none.fl_str_mv 2000
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/4040
http://hdl.handle.net/10316/4040
https://doi.org/10.1016/S0379-7112(00)00018-7
url http://hdl.handle.net/10316/4040
https://doi.org/10.1016/S0379-7112(00)00018-7
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Fire Safety Journal. 35:2 (2000) 77-98
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