Publicação
Thermal behaviour of rebars and steel deck components of composite slabs under natural fire
| Resumo: | Most of the studies involving composite slabs under fire follow the standard fire scenario described by the ISO 834 curve, disregarding the cooling-phase. However, recent studies show that this phase is equally important, as it can lead to the collapse of the structure. Therefore, the present research carried out a parametric study, using numerical models, validated through experimental tests, to evaluate the thermal behaviour of the composite slabs components under natural fire. The results showed that the maximum temperatures in the reinforcement bars occur during the cooling-phase, reaching temperatures up to 300% higher than at the heating-phase, on the steel deck occur at the end of heating, and that the concrete thickness above the steel deck influences the temperature of these components. Also, during the cooling-phase, a “heat bubble” effect is observed on the ribs of the composite slabs, where the reinforcement bars are normally placed. These results highlight the importance of considering different natural fire scenarios, in the structural performance and safety of composite slabs, since during the cooling-phase there is still heat transfer between the elements, which can lead to slab failure. New parameters are proposed to find the temperature of each component for different fire ratings. |
|---|---|
| Autores principais: | Alencar Filho, Marcílio Mariano |
| Outros Autores: | Piloto, Paulo A.G.; Balsa, Carlos |
| Assunto: | Natural fire Fire resistance Composite slab Steel deck Numerical model |
| Ano: | 2022 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Bragança |
| Idioma: | inglês |
| Origem: | Biblioteca Digital do IPB |
| _version_ | 1867172977812963328 |
|---|---|
| author | Alencar Filho, Marcílio Mariano |
| author2 | Piloto, Paulo A.G. Balsa, Carlos |
| author2_role | author author |
| author_facet | Alencar Filho, Marcílio Mariano Piloto, Paulo A.G. Balsa, Carlos |
| author_role | author |
| contributor_name_str_mv | Biblioteca Digital do IPB |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Alencar Filho, Marcílio Mariano\"},{\"Person.name\":\"Piloto, Paulo A.G.\",\"Person.identifier.orcid\":\"0000-0003-2834-0501\"},{\"Person.name\":\"Balsa, Carlos\",\"Person.identifier.orcid\":\"0000-0003-2431-8665\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Biblioteca Digital do IPB |
| datacite.creators.creator.creatorName.fl_str_mv | Alencar Filho, Marcílio Mariano Piloto, Paulo A.G. Balsa, Carlos |
| datacite.date.Accepted.fl_str_mv | 2022-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2023-01-17T12:11:19Z |
| datacite.date.embargoed.fl_str_mv | 2023-01-17T12:11:19Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Natural fire Fire resistance Composite slab Steel deck Numerical model |
| datacite.titles.title.fl_str_mv | Thermal behaviour of rebars and steel deck components of composite slabs under natural fire |
| dc.contributor.none.fl_str_mv | Biblioteca Digital do IPB |
| dc.creator.none.fl_str_mv | Alencar Filho, Marcílio Mariano Piloto, Paulo A.G. Balsa, Carlos |
| dc.date.Accepted.fl_str_mv | 2022-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2023-01-17T12:11:19Z |
| dc.date.embargoed.fl_str_mv | 2023-01-17T12:11:19Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10198/26568 |
| dc.language.none.fl_str_mv | eng |
| dc.rights.cclincense.fl_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Natural fire Fire resistance Composite slab Steel deck Numerical model |
| dc.title.fl_str_mv | Thermal behaviour of rebars and steel deck components of composite slabs under natural fire |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | Most of the studies involving composite slabs under fire follow the standard fire scenario described by the ISO 834 curve, disregarding the cooling-phase. However, recent studies show that this phase is equally important, as it can lead to the collapse of the structure. Therefore, the present research carried out a parametric study, using numerical models, validated through experimental tests, to evaluate the thermal behaviour of the composite slabs components under natural fire. The results showed that the maximum temperatures in the reinforcement bars occur during the cooling-phase, reaching temperatures up to 300% higher than at the heating-phase, on the steel deck occur at the end of heating, and that the concrete thickness above the steel deck influences the temperature of these components. Also, during the cooling-phase, a “heat bubble” effect is observed on the ribs of the composite slabs, where the reinforcement bars are normally placed. These results highlight the importance of considering different natural fire scenarios, in the structural performance and safety of composite slabs, since during the cooling-phase there is still heat transfer between the elements, which can lead to slab failure. New parameters are proposed to find the temperature of each component for different fire ratings. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://bibliotecadigital.ipb.pt/bitstreams/97aa8e0c-c20a-485a-bcfc-33ef54df1b72/download |
| id | ipb_998f792fb2e2c0fc41e42ff5f4de44b9 |
| identifier.url.fl_str_mv | http://hdl.handle.net/10198/26568 |
| instacron_str | ipb |
| institution | Instituto Politécnico de Bragança |
| instname_str | Instituto Politécnico de Bragança |
| language | eng |
| network_acronym_str | ipb |
| network_name_str | Biblioteca Digital do IPB |
| oai_identifier_str | oai:bibliotecadigital.ipb.pt:10198/26568 |
| organization_str_mv | urn:organizationAcronym:ipb |
| person_str_mv | Alencar Filho, Marcílio Mariano Piloto, Paulo A.G. Piloto, Paulo A.G. https://www.ciencia-id.pt/0519-449D-6F13 0519-449D-6F13 http://orcid.org/0000-0003-2834-0501 0000-0003-2834-0501 Balsa, Carlos Balsa, Carlos https://www.ciencia-id.pt/DE1E-2F7A-AAB1 DE1E-2F7A-AAB1 http://orcid.org/0000-0003-2431-8665 0000-0003-2431-8665 |
| publishDate | 2022 |
| reponame_str | Biblioteca Digital do IPB |
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| service_str_mv | urn:repositoryAcronym:ipb |
| spelling | engpt_PTMost of the studies involving composite slabs under fire follow the standard fire scenario described by the ISO 834 curve, disregarding the cooling-phase. However, recent studies show that this phase is equally important, as it can lead to the collapse of the structure. Therefore, the present research carried out a parametric study, using numerical models, validated through experimental tests, to evaluate the thermal behaviour of the composite slabs components under natural fire. The results showed that the maximum temperatures in the reinforcement bars occur during the cooling-phase, reaching temperatures up to 300% higher than at the heating-phase, on the steel deck occur at the end of heating, and that the concrete thickness above the steel deck influences the temperature of these components. Also, during the cooling-phase, a “heat bubble” effect is observed on the ribs of the composite slabs, where the reinforcement bars are normally placed. These results highlight the importance of considering different natural fire scenarios, in the structural performance and safety of composite slabs, since during the cooling-phase there is still heat transfer between the elements, which can lead to slab failure. New parameters are proposed to find the temperature of each component for different fire ratings.application/pdfpt_PTThermal behaviour of rebars and steel deck components of composite slabs under natural fireAlencar Filho, Marcílio MarianoPersonalPiloto, Paulo A.G.DSpacehttp://dspace.org/items/baaee084-ab97-4c95-b636-24ab6bab0e3eDSpacehttp://dspace.org/items/baaee084-ab97-4c95-b636-24ab6bab0e3ePilotoPaulo A.G.Ciência IDhttps://www.ciencia-id.pt0519-449D-6F13ORCIDhttp://orcid.org0000-0003-2834-0501Researcher IDhttps://www.researcherid.comB-4866-2008Scopus Author IDhttps://www.scopus.com6506406159PersonalBalsa, CarlosDSpacehttp://dspace.org/items/d0e5ccff-9696-4f4f-9567-8d698a6bf17dDSpacehttp://dspace.org/items/d0e5ccff-9696-4f4f-9567-8d698a6bf17dBalsaCarlosCiência IDhttps://www.ciencia-id.ptDE1E-2F7A-AAB1ORCIDhttp://orcid.org0000-0003-2431-8665Researcher IDhttps://www.researcherid.comM-8735-2013Scopus Author IDhttps://www.scopus.com23391719100HostingInstitutionOrganizationalBiblioteca Digital do IPBe-mailmailto:dspace@ipb.ptdspace@ipb.ptDOIIsPartOf10.3390/jcs60802322023-01-17T12:11:19Z20222022-01-01T00:00:00ZHandlehttp://hdl.handle.net/10198/26568http://purl.org/coar/access_right/c_abf2open accessNatural fireFire resistanceComposite slabSteel deckNumerical model6800073 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal article2022http://creativecommons.org/licenses/by/4.0/http://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://bibliotecadigital.ipb.pt/bitstreams/97aa8e0c-c20a-485a-bcfc-33ef54df1b72/downloadJournal of Composites Science68 |
| spellingShingle | Thermal behaviour of rebars and steel deck components of composite slabs under natural fire Alencar Filho, Marcílio Mariano Natural fire Fire resistance Composite slab Steel deck Numerical model |
| status | SINGLETON |
| subject.fl_str_mv | Natural fire Fire resistance Composite slab Steel deck Numerical model |
| title | Thermal behaviour of rebars and steel deck components of composite slabs under natural fire |
| title_full | Thermal behaviour of rebars and steel deck components of composite slabs under natural fire |
| title_fullStr | Thermal behaviour of rebars and steel deck components of composite slabs under natural fire |
| title_full_unstemmed | Thermal behaviour of rebars and steel deck components of composite slabs under natural fire |
| title_short | Thermal behaviour of rebars and steel deck components of composite slabs under natural fire |
| title_sort | Thermal behaviour of rebars and steel deck components of composite slabs under natural fire |
| topic | Natural fire Fire resistance Composite slab Steel deck Numerical model |
| topic_facet | Natural fire Fire resistance Composite slab Steel deck Numerical model |
| url | http://hdl.handle.net/10198/26568 |
| visible | 1 |