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Bending resistance of austenitic stainless steel hollow sections at elevated temperatures

2024Journal article Open access
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dc.contributor.authorPiloto, P.A.G.
dc.contributor.authorMesquita, L.M.R.
dc.contributor.authorCruz, Áureo A.T.
dc.contributor.authorLopes, Nuno
dc.contributor.authorArrais, Flávio
dc.contributor.authorReal, Paulo Vila
dc.date.accessioned2024-01-24T09:23:46Z
dc.date.available2024-01-24T09:23:46Z
dc.date.issued2024
dc.description.abstractThe present research aims to increase the knowledge of the structural behaviour of stainless steel members under fire. Eight experimental bending tests at elevated temperatures (500, 700 ºC) built with RHS 150×100×3 austenitic stainless-steel beams, using two different grades (1.4301, 1.4571) also known as 304 and 316Ti, are presented. Both grades 1.4301 (X5CrNi18–10) and 1.4571 (X6CrNiMo17–12–2) have almost the same core chemical composition but there are some differences, especially the grade 1.4571 has 2–2.5% molybdenum and a small amount of titanium (less than 0.7%). Grade 1.4301 presents good rust resistance, sufficient acid resistance and good weldability, while grade 1.4571 presents very good rust resistance, very good acid resistance and also good weldability. Both have almost the same strength, but grade 1.4571 has superior strength at elevated temperatures. Both material grades were experimentally characterised with coupon tensile tests at room temperature. The load-displacement behaviour is validated with 3D shell finite element models, assuming a true stress-strain material model, based on the two-stage Ramberg Osgood constitutive law. With the developed numerical model, a parametric analysis is presented to study the fire resistance of beams from both materials, using three different cross-sections and eleven different temperatures. The bending resistance obtained with the finite element model is in good agreement with the cross-sectional design moment resistance, when considering the effective area, confirming that the design rules from EN1993–1–2 are safe for less slender cross-sections and unsafe for the most slender cross-sections.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPiloto, P.A.G.; Mesquita, L.M.R.; Cruz, Áureo A.T.; Lopes, Nuno; Arrais, Flávio; Real, Paulo Vila (2024). Bending resistance of austenitic stainless steel hollow sections at elevated temperatures. Structures. eISSN 2352-0124. 59, p. 1-10pt_PT
dc.identifier.doi10.1016/j.istruc.2023.105690pt_PT
dc.identifier.eissn2352-0124
dc.identifier.urihttp://hdl.handle.net/10198/29304
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectStainless steel beamspt_PT
dc.subjectFirept_PT
dc.subjectElevated temperaturespt_PT
dc.subjectBending resistancept_PT
dc.subjectExperimental investigationpt_PT
dc.subjectNumerical investigationpt_PT
dc.titleBending resistance of austenitic stainless steel hollow sections at elevated temperaturespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage10pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleStructurespt_PT
oaire.citation.volume59pt_PT
person.familyNamePiloto
person.familyNameMesquita
person.givenNamePaulo A.G.
person.givenNameLuís M.R.
person.identifier1339117
person.identifier.ciencia-id0519-449D-6F13
person.identifier.ciencia-id401E-2FEC-8303
person.identifier.orcid0000-0003-2834-0501
person.identifier.orcid0000-0002-2385-4282
person.identifier.ridB-4866-2008
person.identifier.ridF-2269-2010
person.identifier.scopus-author-id6506406159
person.identifier.scopus-author-id8585923500
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationbaaee084-ab97-4c95-b636-24ab6bab0e3e
relation.isAuthorOfPublication3d08baba-b032-42c4-8244-94672c4611a1
relation.isAuthorOfPublication.latestForDiscovery3d08baba-b032-42c4-8244-94672c4611a1

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