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Three-dimensional numerical analysis on the fire behaviour of composite slabs with steel deck

2020Conference paper Open access
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dc.contributor.authorPiloto, P.A.G.
dc.contributor.authorBalsa, Carlos
dc.contributor.authorRibeiro, Fernando
dc.contributor.authorRigobello, Ronaldo
dc.date.accessioned2020-06-18T10:52:13Z
dc.date.available2020-06-18T10:52:13Z
dc.date.issued2020
dc.description.abstractA composite steel-concrete slab consists of a concrete topping cast on the top of a profiled steel deck. Normally, the concrete is reinforced with an anti-crack mesh positioned on the upper part and individual reinforcing bars placed within the ribs. Composite slabs play an important role in the overall stability of buildings during a fire, and must be designed in accordance with regulations and standards. Usually, this structural element is rated on the basis of standard fire tests using the standard fire curve ISO 834. The fire resistance should be determined according to three different criteria, namely Load Bearing (R), Integrity (E) and Insulation (I). The Annex D of the EN 1994-1-2 presents a simplified calculation method for the determination of the fire resistance (I) of composite slabs subjected to standard fire exposure from below. During the last two decades, no revisions were made to this method, and there are no proposals for changes in the design formulae for the next version of the EN 1994-1-2. This investigation presents the development of numerical thermal models for three-dimensional analysis of composite slabs under fire conditions in ANSYS and MATLAB. During fire exposure, the steel deck heats up rapidly, expands and may separate from the concrete topping. In order to simulate debonding effects, an alternative thermal model is utilized, presenting an air gap with constant thickness between the steel deck and the concrete topping. The results of the numerical simulations are validated against the results of experimental fire tests, and compared with the simplified calculation method. A new equation is proposed for the calculation of the fire resistance (I) of composite slabs.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPiloto, P.A.G.; Balsa, Carlos; Ribeiro, Fernando; Rigobello, Ronaldo (2020). Three-dimensional numerical analysis on the fire behaviour of composite slabs with steel deck. In Iberian-Latin-American Congress on Fire Safety. Spriger. p. 12-30. ISBN 978-3-030-36240-9pt_PT
dc.identifier.doi10.1007/978-3-030-36240-9_2pt_PT
dc.identifier.urihttp://hdl.handle.net/10198/22114
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectComposite slabspt_PT
dc.subjectFire resistancept_PT
dc.subjectInsulation criterionpt_PT
dc.subjectNumerical simulationpt_PT
dc.titleThree-dimensional numerical analysis on the fire behaviour of composite slabs with steel deckpt_PT
dc.typeconference paper
dspace.entity.typePublication
oaire.citation.endPage30pt_PT
oaire.citation.startPage12pt_PT
oaire.citation.titleLecture Notes in Civil Engineeringpt_PT
oaire.citation.volume1pt_PT
person.familyNamePiloto
person.familyNameBalsa
person.givenNamePaulo A.G.
person.givenNameCarlos
person.identifier1721518
person.identifier.ciencia-id0519-449D-6F13
person.identifier.ciencia-idDE1E-2F7A-AAB1
person.identifier.orcid0000-0003-2834-0501
person.identifier.orcid0000-0003-2431-8665
person.identifier.ridB-4866-2008
person.identifier.ridM-8735-2013
person.identifier.scopus-author-id6506406159
person.identifier.scopus-author-id23391719100
rcaap.rightsrestrictedAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublicationbaaee084-ab97-4c95-b636-24ab6bab0e3e
relation.isAuthorOfPublicationd0e5ccff-9696-4f4f-9567-8d698a6bf17d
relation.isAuthorOfPublication.latestForDiscoveryd0e5ccff-9696-4f4f-9567-8d698a6bf17d

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