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Time-dependent reliability analyses of prestressed concrete girders strengthened with CFRP laminates

2019-10-01Journal article Open access
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dc.contributor.authorDias-da-Costa, D.
dc.contributor.authorNeves, L.A.C.
dc.contributor.authorGomes, S.
dc.contributor.authorHadigheh, S.A.
dc.contributor.authorFernandes, Paulo
dc.date.accessioned2019-09-27T09:05:52Z
dc.date.available2021-10-01T00:30:14Z
dc.date.issued2019-10-01
dc.description.abstractThis paper presents a time-dependent reliability analysis of prestressed concrete girders subjected to degradation caused by pitting corrosion. The procedure presented includes the effects of both spatial and temporal pitting corrosions on prestressing steel, as well as the degradation of the strengthening CFRP laminate used for the rehabilitation of the member. Results indicate that the correlation of corrosion in different segments of the prestressing tendons impacts on the computed safety index for the deteriorated structure. Ditlevsen bounds are proposed for a better approximation of the correlation between failure modes in the spatial discretisation. Results show that such approach produces adequate estimates of the reliability index over the full range of analysis in comparison with other tested models. It is also observed that the degradation of the CFRP laminates does not affect the reliability as significantly as corrosion, and that traffic loads, models uncertainties, corrosion error and corrosion rate are the most relevant variables in the analysis, followed by prestressing strength and concrete cover. The significance of the variables changes with time: the corrosion rate, corrosion model error and concrete cover increase in importance with the development of corrosion, whereas traffic loads become gradually less important.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationD. Dias-da-Costa, L.A.C. Neves, S. Gomes, S.A. Hadigheh, P. Fernandes, Time-dependent reliability analyses of prestressed concrete girders strengthened with CFRP laminates, Engineering Structures, Volume 196, 2019, 109297, ISSN 0141-0296, https://doi.org/10.1016/j.engstruct.2019.109297.pt_PT
dc.identifier.doi10.1016/j.engstruct.2019.109297
dc.identifier.issn0141-0296
dc.identifier.urihttp://hdl.handle.net/10400.8/4125
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0141029619305188pt_PT
dc.subjectCFRP laminate degradationpt_PT
dc.subjectPrestressed girderpt_PT
dc.subjectTime-dependent reliabilitypt_PT
dc.subjectSpatial variabilitypt_PT
dc.subjectCorrosionpt_PT
dc.subjectDitlevsen boundspt_PT
dc.titleTime-dependent reliability analyses of prestressed concrete girders strengthened with CFRP laminatespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage109297pt_PT
oaire.citation.titleEngineering Structurespt_PT
oaire.citation.volume196pt_PT
person.familyNameFernandes
person.givenNamePaulo
person.identifier.ciencia-idF41A-AFFE-B165
person.identifier.orcid0000-0002-5644-8889
person.identifier.scopus-author-id56701925300
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication7375e114-0963-49a2-be76-c52dd45c0338
relation.isAuthorOfPublication.latestForDiscovery7375e114-0963-49a2-be76-c52dd45c0338

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