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Partial safety factors for prestressed concrete girders 2 strengthened with CFRP laminates

2020-02Journal 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.authorGraça-e-Costa, R.
dc.contributor.authorHadigheh, S. A.
dc.contributor.authorFernandes, P.
dc.date.accessioned2021-06-24T11:35:59Z
dc.date.available2021-06-24T11:35:59Z
dc.date.issued2020-02
dc.description.abstractThis paper provides a framework for the calibration of partial safety factors in prestressed concrete (PC) girders strengthened in flexure with carbon fiber-reinforced polymer (CFRP) laminates. A hybrid approach was proposed to take advantage of comprehensive nonlinear numerical models in reliability analysis using a first-order reliability method (FORM) in conjunction with the response surface method (RSM). The PC girders selected for analyses were taken from real structures designed and built in the 1980s based on old standards that now require strengthening and upgrade due to partial corrosion of the prestressing strands. Using the proposed approach, a sensitivity analysis was performed to identify the most relevant variables and assess the area of CFRP laminates needed to restore capacity up to new design standards. A partial safety factor was proposed for strengthening PC girders using CFRP laminates. Sensitivity analysis showed that traffic loads and model uncertainties are the most important variables for calibration. (C) 2019 American Society of Civil Engineers.
dc.description.sponsorshipPortuguese Science and Technology Foundation (FCT)Portuguese Foundation for Science and Technology [SFRH/BD/76345/2011]
dc.description.sponsorshipAustralian Research CouncilAustralian Research Council [DE150101703, LP140100591]
dc.description.sponsorshipFCT, within Institute for Sustainability and Innovation in Structural Engineering (ISISE) [UID/ECI/04029/2013]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1061/(ASCE)CC.1943-5614.0000993
dc.identifier.issn1090-0268
dc.identifier.urihttp://hdl.handle.net/10400.1/16596
dc.language.isoeng
dc.peerreviewedyes
dc.publisherAmerican Society of Civil Engineers
dc.relationMODELAÇÃO TRIDIMENSIONAL DE INTERFACES ESTRUTURAIS BETÃO-BETÃO
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectCFRP laminates
dc.subjectConcrete girder
dc.subjectReliability
dc.subjectNumerical models
dc.subjectPartial safety factors
dc.subjectTarget reliability index
dc.subject.otherEngineering; Mechanics; Materials Science
dc.titlePartial safety factors for prestressed concrete girders 2 strengthened with CFRP laminates
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMODELAÇÃO TRIDIMENSIONAL DE INTERFACES ESTRUTURAIS BETÃO-BETÃO
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F76345%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FECI%2F04029%2F2013/PT
oaire.citation.issue1
oaire.citation.startPage04019060
oaire.citation.titleJournal of Composites For Construction
oaire.citation.volume24
oaire.fundingStream5876
person.familyNameGraça-e-Costa
person.givenNameRui
person.identifier.ciencia-id341C-F910-81BF
person.identifier.orcid0000-0001-7704-2506
person.identifier.scopus-author-id55514058200
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticle
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