Partial safety factors for prestressed concrete girders 2 strengthened with CFRP laminates
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.1/16596 |
Resumo: | This 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. |
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Partial safety factors for prestressed concrete girders 2 strengthened with CFRP laminatesCFRP laminatesConcrete girderReliabilityNumerical modelsPartial safety factorsTarget reliability indexEngineering; Mechanics; Materials ScienceThis 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.Portuguese Science and Technology Foundation (FCT)Portuguese Foundation for Science and Technology [SFRH/BD/76345/2011]Australian Research CouncilAustralian Research Council [DE150101703, LP140100591]FCT, within Institute for Sustainability and Innovation in Structural Engineering (ISISE) [UID/ECI/04029/2013]American Society of Civil EngineersSapientiaDias-da-Costa, D.Neves, L. A. C.Gomes, S.Graça-e-Costa, R.Hadigheh, S. A.Fernandes, P.2021-06-24T11:35:59Z2020-022020-02-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/16596eng1090-026810.1061/(ASCE)CC.1943-5614.0000993info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-24T10:28:33Zoai:sapientia.ualg.pt:10400.1/16596Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:06:42.548104Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Partial safety factors for prestressed concrete girders 2 strengthened with CFRP laminates |
title |
Partial safety factors for prestressed concrete girders 2 strengthened with CFRP laminates |
spellingShingle |
Partial safety factors for prestressed concrete girders 2 strengthened with CFRP laminates Dias-da-Costa, D. CFRP laminates Concrete girder Reliability Numerical models Partial safety factors Target reliability index Engineering; Mechanics; Materials Science |
title_short |
Partial safety factors for prestressed concrete girders 2 strengthened with CFRP laminates |
title_full |
Partial safety factors for prestressed concrete girders 2 strengthened with CFRP laminates |
title_fullStr |
Partial safety factors for prestressed concrete girders 2 strengthened with CFRP laminates |
title_full_unstemmed |
Partial safety factors for prestressed concrete girders 2 strengthened with CFRP laminates |
title_sort |
Partial safety factors for prestressed concrete girders 2 strengthened with CFRP laminates |
author |
Dias-da-Costa, D. |
author_facet |
Dias-da-Costa, D. Neves, L. A. C. Gomes, S. Graça-e-Costa, R. Hadigheh, S. A. Fernandes, P. |
author_role |
author |
author2 |
Neves, L. A. C. Gomes, S. Graça-e-Costa, R. Hadigheh, S. A. Fernandes, P. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Dias-da-Costa, D. Neves, L. A. C. Gomes, S. Graça-e-Costa, R. Hadigheh, S. A. Fernandes, P. |
dc.subject.por.fl_str_mv |
CFRP laminates Concrete girder Reliability Numerical models Partial safety factors Target reliability index Engineering; Mechanics; Materials Science |
topic |
CFRP laminates Concrete girder Reliability Numerical models Partial safety factors Target reliability index Engineering; Mechanics; Materials Science |
description |
This 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. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-02 2020-02-01T00:00:00Z 2021-06-24T11:35:59Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.1/16596 |
url |
http://hdl.handle.net/10400.1/16596 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1090-0268 10.1061/(ASCE)CC.1943-5614.0000993 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
American Society of Civil Engineers |
publisher.none.fl_str_mv |
American Society of Civil Engineers |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799133310131109888 |