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Thermomechanical behavior of circular steel arches

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dc.contributor.authorGomes, Margarida
dc.contributor.authorMesquita, L.M.R.
dc.date.accessioned2019-01-09T11:25:51Z
dc.date.available2019-01-09T11:25:51Z
dc.date.issued2018
dc.description.abstractCircular steel arches are structural members curved in the plane of the applied loads, where the radius of curvature is much higher than the cross-section depth. The main objective of this work is to evaluate the behaviour of circular arches at room and elevated temperatures, like those that can arise from fires. The in plane buckling of arches is analysed numerically, using ANSYS software, considering different domains, linear elastic analysis, nonlinear elastic analysis and nonlinear geometric and material analysis, where the structural capacity of arches are studied in function of the geometric imperfections and residual stresses. The results are compared with those obtained by the simplified methods of Eurocode 3 part 1.1 and 1.2. The circular steel arches considered comprise a parametric analysis for arches with different spans, radius of curvature and opening angle at different temperature values, and subjected to an uniform radial distributed load. The values of the critical compression loads and the collapse loads were obtained for the different arcs, supports and temperatures. For the different geometries, the results allows to define the instability failure modes, symmetric or antisymmetric. It is concluded that increasing the arch height to the span ratio produces a decrease of the elastic critical load and the collapse load of the arch. The collapse mode for shorter arches is due to the formation of a plastic hinge whereas in the long span arches the structure will became instable before plastification, producing in plane instability in its stronger plane.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGomes, Margarida; Mesquita, L.M.R. (2017). Thermomechanical behavior of circular steel arches. In V Encontro de Jovens Investigadores do Instituto Politécnico de Bragança. Bragançapt_PT
dc.identifier.urihttp://hdl.handle.net/10198/18356
dc.language.isoengpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectSteel archespt_PT
dc.subjectBucklingpt_PT
dc.subjectCritical loadpt_PT
dc.titleThermomechanical behavior of circular steel archespt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceBRAGANÇApt_PT
oaire.citation.titleV Encontro de Jovens Investigadores do Instituto Politécnico de Bragançapt_PT
person.familyNameMesquita
person.givenNameLuís M.R.
person.identifier1339117
person.identifier.ciencia-id401E-2FEC-8303
person.identifier.orcid0000-0002-2385-4282
person.identifier.ridF-2269-2010
person.identifier.scopus-author-id8585923500
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication3d08baba-b032-42c4-8244-94672c4611a1
relation.isAuthorOfPublication.latestForDiscovery3d08baba-b032-42c4-8244-94672c4611a1

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