Experimental bending tests of partially encased beams at elevated temperatures

Detalhes bibliográficos
Autor(a) principal: Piloto, P.A.G.
Data de Publicação: 2017
Outros Autores: Ramos Gavilán, Ana Belén, Gonçalves, Carlos, Mesquita, L.M.R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10198/15410
Resumo: This paper presents the result of an experimental research about the lateral torsional buckling instability during bending tests of Partially Encased Beams (PEB) at elevated temperature. A set of twenty seven four-point bending tests, grouped in ten series, were carried out to analyse the influence of relative slenderness, beam temperature and the shear bond conditions between concrete and steel in bending. In addition, this study compares the behaviour of PEB and bare steel beam under bending at room temperature. PEB specimens are based on IPE100 steel profiles, with two different lengths 2.4 m (medium series) and 3.9 m (large series), tested in bending using simple supporting conditions and exposed to different temperatures levels of 200 °C, 400 °C, and 600 °C. Two different shear bond conditions, between steel profile and lateral concrete, were analysed at 400 °C: one series with connectors formed by welded stirrups to the web and another series with natural adherence between steel and concrete, not welded stirrups. PEB attained lateral torsional buckling as deformed failure mode at the ultimate limit state, except for the case of PEB tested at 600 °C that results in a plastic hinge failure. The bending resistance was determined for the maximum load event (F u ) and for the displacement limit corresponding to L/30 (F L/30 ) and compared with the results of the Eurocode 3 part 1–2 simple calculation method, considering an adaptation of its formulae to PEB. The expected reduction in bending resistance at elevated temperature is in good agreement with the experimental reduction factor, when the deformation criterion is used.
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spelling Experimental bending tests of partially encased beams at elevated temperaturesBending resistanceComposite steel and concreteElevated temperatureExperimental testsLateral torsional bucklingPartially encased beamsThis paper presents the result of an experimental research about the lateral torsional buckling instability during bending tests of Partially Encased Beams (PEB) at elevated temperature. A set of twenty seven four-point bending tests, grouped in ten series, were carried out to analyse the influence of relative slenderness, beam temperature and the shear bond conditions between concrete and steel in bending. In addition, this study compares the behaviour of PEB and bare steel beam under bending at room temperature. PEB specimens are based on IPE100 steel profiles, with two different lengths 2.4 m (medium series) and 3.9 m (large series), tested in bending using simple supporting conditions and exposed to different temperatures levels of 200 °C, 400 °C, and 600 °C. Two different shear bond conditions, between steel profile and lateral concrete, were analysed at 400 °C: one series with connectors formed by welded stirrups to the web and another series with natural adherence between steel and concrete, not welded stirrups. PEB attained lateral torsional buckling as deformed failure mode at the ultimate limit state, except for the case of PEB tested at 600 °C that results in a plastic hinge failure. The bending resistance was determined for the maximum load event (F u ) and for the displacement limit corresponding to L/30 (F L/30 ) and compared with the results of the Eurocode 3 part 1–2 simple calculation method, considering an adaptation of its formulae to PEB. The expected reduction in bending resistance at elevated temperature is in good agreement with the experimental reduction factor, when the deformation criterion is used.Authors acknowledge material support to the following companies and institutions: Arcelor – Mittal (Spain), J. Soares Correia (Portugal), Fepronor (Portugal), Hierros Furquet (Spain) and D. Samuel Solorzano Barruso Memorial Foundation-University of Salamanca (Spain).Biblioteca Digital do IPBPiloto, P.A.G.Ramos Gavilán, Ana BelénGonçalves, CarlosMesquita, L.M.R.2018-01-31T10:00:00Z20172017-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/15410engPiloto, Paulo A.G.; Ramos-Gavilán, Ana B.; Gonçalves, Carlos; Mesquita, Luís M.R. (2017). Experimental bending tests of partially encased beams at elevated temperatures. Fire Safety Journal. ISSN 0379-7112. 92, p. 23-410379-711210.1016/j.firesaf.2017.05.014info: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:RCAAP2023-11-21T10:36:00Zoai:bibliotecadigital.ipb.pt:10198/15410Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:05:00.478075Repositório 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 bending tests of partially encased beams at elevated temperatures
title Experimental bending tests of partially encased beams at elevated temperatures
spellingShingle Experimental bending tests of partially encased beams at elevated temperatures
Piloto, P.A.G.
Bending resistance
Composite steel and concrete
Elevated temperature
Experimental tests
Lateral torsional buckling
Partially encased beams
title_short Experimental bending tests of partially encased beams at elevated temperatures
title_full Experimental bending tests of partially encased beams at elevated temperatures
title_fullStr Experimental bending tests of partially encased beams at elevated temperatures
title_full_unstemmed Experimental bending tests of partially encased beams at elevated temperatures
title_sort Experimental bending tests of partially encased beams at elevated temperatures
author Piloto, P.A.G.
author_facet Piloto, P.A.G.
Ramos Gavilán, Ana Belén
Gonçalves, Carlos
Mesquita, L.M.R.
author_role author
author2 Ramos Gavilán, Ana Belén
Gonçalves, Carlos
Mesquita, L.M.R.
author2_role author
author
author
dc.contributor.none.fl_str_mv Biblioteca Digital do IPB
dc.contributor.author.fl_str_mv Piloto, P.A.G.
Ramos Gavilán, Ana Belén
Gonçalves, Carlos
Mesquita, L.M.R.
dc.subject.por.fl_str_mv Bending resistance
Composite steel and concrete
Elevated temperature
Experimental tests
Lateral torsional buckling
Partially encased beams
topic Bending resistance
Composite steel and concrete
Elevated temperature
Experimental tests
Lateral torsional buckling
Partially encased beams
description This paper presents the result of an experimental research about the lateral torsional buckling instability during bending tests of Partially Encased Beams (PEB) at elevated temperature. A set of twenty seven four-point bending tests, grouped in ten series, were carried out to analyse the influence of relative slenderness, beam temperature and the shear bond conditions between concrete and steel in bending. In addition, this study compares the behaviour of PEB and bare steel beam under bending at room temperature. PEB specimens are based on IPE100 steel profiles, with two different lengths 2.4 m (medium series) and 3.9 m (large series), tested in bending using simple supporting conditions and exposed to different temperatures levels of 200 °C, 400 °C, and 600 °C. Two different shear bond conditions, between steel profile and lateral concrete, were analysed at 400 °C: one series with connectors formed by welded stirrups to the web and another series with natural adherence between steel and concrete, not welded stirrups. PEB attained lateral torsional buckling as deformed failure mode at the ultimate limit state, except for the case of PEB tested at 600 °C that results in a plastic hinge failure. The bending resistance was determined for the maximum load event (F u ) and for the displacement limit corresponding to L/30 (F L/30 ) and compared with the results of the Eurocode 3 part 1–2 simple calculation method, considering an adaptation of its formulae to PEB. The expected reduction in bending resistance at elevated temperature is in good agreement with the experimental reduction factor, when the deformation criterion is used.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017-01-01T00:00:00Z
2018-01-31T10:00:00Z
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/10198/15410
url http://hdl.handle.net/10198/15410
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Piloto, Paulo A.G.; Ramos-Gavilán, Ana B.; Gonçalves, Carlos; Mesquita, Luís M.R. (2017). Experimental bending tests of partially encased beams at elevated temperatures. Fire Safety Journal. ISSN 0379-7112. 92, p. 23-41
0379-7112
10.1016/j.firesaf.2017.05.014
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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