Experimental and numerical research on the critical temperature of laterally unrestrained steel I beams
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/2135 |
Resumo: | Lateral unrestrained steel beams when subjected to high temperatures may collapse in service by lateral torsional buckling. This instability state may be predicted in the resistance, temperature and time domain. In this work the beam strength is determined in the temperature domain from a batch of numerical and experimental tests, with a specified degree of utilisation and a typical accident temperature rise. The experimental set-up is a reaction portal frame especially designed for beam elements under elevated temperatures. The specimens were heated by means of electroceramic resistances and a fibre mat specimen cover is used to increase the thermal efficiency. The material and the beam initial state conditions were considered, the experimental procedure being based on constant mechanical action under increasing thermal load. The experimental data was compared with numerical solutions, obtained from a geometric and material nonlinear analysis. A shell finite element modelling, with incremental and iterative procedures, was used in the numerical calculations. Good agreement was obtained between experimental and numerical data. However, both numerical and experimental results lead to higher critical temperatures when compared with the simplified calculation procedure presented in Eurocode for this case. |
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Experimental and numerical research on the critical temperature of laterally unrestrained steel I beamsSteel beamsFire resistanceLateral bucklingCritical temperatureExperimental testsNumerical analysisLateral unrestrained steel beams when subjected to high temperatures may collapse in service by lateral torsional buckling. This instability state may be predicted in the resistance, temperature and time domain. In this work the beam strength is determined in the temperature domain from a batch of numerical and experimental tests, with a specified degree of utilisation and a typical accident temperature rise. The experimental set-up is a reaction portal frame especially designed for beam elements under elevated temperatures. The specimens were heated by means of electroceramic resistances and a fibre mat specimen cover is used to increase the thermal efficiency. The material and the beam initial state conditions were considered, the experimental procedure being based on constant mechanical action under increasing thermal load. The experimental data was compared with numerical solutions, obtained from a geometric and material nonlinear analysis. A shell finite element modelling, with incremental and iterative procedures, was used in the numerical calculations. Good agreement was obtained between experimental and numerical data. However, both numerical and experimental results lead to higher critical temperatures when compared with the simplified calculation procedure presented in Eurocode for this case.ElsevierBiblioteca Digital do IPBMesquita, L.M.R.Piloto, P.A.G.Vaz, M.A.P.Vila Real, Paulo M.M.2010-02-24T11:12:47Z200520052010-02-01T10:36:46Z2005-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/2135engMesquita, L.M.R.; Piloto, P.A.G.; Vaz, M.A.P.; Vila Real, P.M.M. (2005). Experimental and numerical research on the critical temperature of laterally unrestrained steel I beams. Journal of Constructional Steel Research. ISSN 0143-974X. 61:10, p.1435-14460143-974X10.1016/j.jcsr.2005.04.003info: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:RCAAP2023-11-21T10:06:35Zoai:bibliotecadigital.ipb.pt:10198/2135Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:55:29.267696Repositório 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 and numerical research on the critical temperature of laterally unrestrained steel I beams |
title |
Experimental and numerical research on the critical temperature of laterally unrestrained steel I beams |
spellingShingle |
Experimental and numerical research on the critical temperature of laterally unrestrained steel I beams Mesquita, L.M.R. Steel beams Fire resistance Lateral buckling Critical temperature Experimental tests Numerical analysis |
title_short |
Experimental and numerical research on the critical temperature of laterally unrestrained steel I beams |
title_full |
Experimental and numerical research on the critical temperature of laterally unrestrained steel I beams |
title_fullStr |
Experimental and numerical research on the critical temperature of laterally unrestrained steel I beams |
title_full_unstemmed |
Experimental and numerical research on the critical temperature of laterally unrestrained steel I beams |
title_sort |
Experimental and numerical research on the critical temperature of laterally unrestrained steel I beams |
author |
Mesquita, L.M.R. |
author_facet |
Mesquita, L.M.R. Piloto, P.A.G. Vaz, M.A.P. Vila Real, Paulo M.M. |
author_role |
author |
author2 |
Piloto, P.A.G. Vaz, M.A.P. Vila Real, Paulo M.M. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Mesquita, L.M.R. Piloto, P.A.G. Vaz, M.A.P. Vila Real, Paulo M.M. |
dc.subject.por.fl_str_mv |
Steel beams Fire resistance Lateral buckling Critical temperature Experimental tests Numerical analysis |
topic |
Steel beams Fire resistance Lateral buckling Critical temperature Experimental tests Numerical analysis |
description |
Lateral unrestrained steel beams when subjected to high temperatures may collapse in service by lateral torsional buckling. This instability state may be predicted in the resistance, temperature and time domain. In this work the beam strength is determined in the temperature domain from a batch of numerical and experimental tests, with a specified degree of utilisation and a typical accident temperature rise. The experimental set-up is a reaction portal frame especially designed for beam elements under elevated temperatures. The specimens were heated by means of electroceramic resistances and a fibre mat specimen cover is used to increase the thermal efficiency. The material and the beam initial state conditions were considered, the experimental procedure being based on constant mechanical action under increasing thermal load. The experimental data was compared with numerical solutions, obtained from a geometric and material nonlinear analysis. A shell finite element modelling, with incremental and iterative procedures, was used in the numerical calculations. Good agreement was obtained between experimental and numerical data. However, both numerical and experimental results lead to higher critical temperatures when compared with the simplified calculation procedure presented in Eurocode for this case. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005 2005 2005-01-01T00:00:00Z 2010-02-24T11:12:47Z 2010-02-01T10:36:46Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10198/2135 |
url |
http://hdl.handle.net/10198/2135 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Mesquita, L.M.R.; Piloto, P.A.G.; Vaz, M.A.P.; Vila Real, P.M.M. (2005). Experimental and numerical research on the critical temperature of laterally unrestrained steel I beams. Journal of Constructional Steel Research. ISSN 0143-974X. 61:10, p.1435-1446 0143-974X 10.1016/j.jcsr.2005.04.003 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799135159428055040 |