Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRP

Detalhes bibliográficos
Autor(a) principal: Rezazadeh, Mohammadali
Data de Publicação: 2015
Outros Autores: Barros, Joaquim A. O., Costa, I. G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/38274
Resumo: The objective of this paper is to propose a simplified analytical approach to predict the flexural behavior of simply supported reinforced-concrete (RC) beams flexurally strengthened with prestressed carbon fiber reinforced polymer (CFRP) reinforcements using either externally bonded reinforcing (EBR) or near surface mounted (NSM) techniques. This design methodology also considers the ultimate flexural capacity of NSM CFRP strengthened beams when concrete cover delamination is the governing failure mode. A moment–curvature (M–χ) relationship formed by three linear branches corresponding to the precracking, postcracking, and postyielding stages is established by considering the four critical M–χ points that characterize the flexural behavior of CFRP strengthened beams. Two additional M–χ points, namely, concrete decompression and steel decompression, are also defined to assess the initial effects of the prestress force applied by the FRP reinforcement. The mid-span deflection of the beams is predicted based on the curvature approach, assuming a linear curvature variation between the critical points along the beam length. The good predictive performance of the analytical model is appraised by simulating the force–deflection response registered in experimental programs composed of RC beams strengthened with prestressed NSM CFRP reinforcements.
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spelling Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRPAnalytical approachFlexural analysisRC beamsPrestressed CFRP reinforcementConcrete cover delaminationCarbon fiberAnalytical modelingStatistical properties/methodsDelaminationA. Carbon fiberB. DelaminationC. Analytical modelingC. Statistical properties/methodsEngenharia e Tecnologia::Engenharia CivilScience & TechnologyThe objective of this paper is to propose a simplified analytical approach to predict the flexural behavior of simply supported reinforced-concrete (RC) beams flexurally strengthened with prestressed carbon fiber reinforced polymer (CFRP) reinforcements using either externally bonded reinforcing (EBR) or near surface mounted (NSM) techniques. This design methodology also considers the ultimate flexural capacity of NSM CFRP strengthened beams when concrete cover delamination is the governing failure mode. A moment–curvature (M–χ) relationship formed by three linear branches corresponding to the precracking, postcracking, and postyielding stages is established by considering the four critical M–χ points that characterize the flexural behavior of CFRP strengthened beams. Two additional M–χ points, namely, concrete decompression and steel decompression, are also defined to assess the initial effects of the prestress force applied by the FRP reinforcement. The mid-span deflection of the beams is predicted based on the curvature approach, assuming a linear curvature variation between the critical points along the beam length. The good predictive performance of the analytical model is appraised by simulating the force–deflection response registered in experimental programs composed of RC beams strengthened with prestressed NSM CFRP reinforcements.The study reported in this paper is part of the project "PreLami - Performance of reinforced concrete structures strengthened in flexural with an innovative system using prestressed NSM CFRP laminates", with the reference PTDC/ECM/114945/2009. The third author also wishes to acknowledge the scholarship granted by FT (SFRH/BD/61756/2009). The authors would also like to acknowledge the support provided by S&P, for supplying the adhesives and the laminates, and Casais and CiviTest for the preparation of the beams.ElsevierUniversidade do MinhoRezazadeh, MohammadaliBarros, Joaquim A. O.Costa, I. G.20152015-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/38274engRezazadeh, M., Barros, J. A. O., & Costa, I. (2015). Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRP. Composites Part B-Engineering, 73, 16-34. doi: 10.1016/j.compositesb.2014.12.0161359-836810.1016/j.compositesb.2014.12.016info: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:RCAAP2023-07-21T12:43:51Zoai:repositorium.sdum.uminho.pt:1822/38274Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:41:25.679256Repositório 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 Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRP
title Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRP
spellingShingle Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRP
Rezazadeh, Mohammadali
Analytical approach
Flexural analysis
RC beams
Prestressed CFRP reinforcement
Concrete cover delamination
Carbon fiber
Analytical modeling
Statistical properties/methods
Delamination
A. Carbon fiber
B. Delamination
C. Analytical modeling
C. Statistical properties/methods
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
title_short Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRP
title_full Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRP
title_fullStr Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRP
title_full_unstemmed Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRP
title_sort Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRP
author Rezazadeh, Mohammadali
author_facet Rezazadeh, Mohammadali
Barros, Joaquim A. O.
Costa, I. G.
author_role author
author2 Barros, Joaquim A. O.
Costa, I. G.
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Rezazadeh, Mohammadali
Barros, Joaquim A. O.
Costa, I. G.
dc.subject.por.fl_str_mv Analytical approach
Flexural analysis
RC beams
Prestressed CFRP reinforcement
Concrete cover delamination
Carbon fiber
Analytical modeling
Statistical properties/methods
Delamination
A. Carbon fiber
B. Delamination
C. Analytical modeling
C. Statistical properties/methods
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
topic Analytical approach
Flexural analysis
RC beams
Prestressed CFRP reinforcement
Concrete cover delamination
Carbon fiber
Analytical modeling
Statistical properties/methods
Delamination
A. Carbon fiber
B. Delamination
C. Analytical modeling
C. Statistical properties/methods
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
description The objective of this paper is to propose a simplified analytical approach to predict the flexural behavior of simply supported reinforced-concrete (RC) beams flexurally strengthened with prestressed carbon fiber reinforced polymer (CFRP) reinforcements using either externally bonded reinforcing (EBR) or near surface mounted (NSM) techniques. This design methodology also considers the ultimate flexural capacity of NSM CFRP strengthened beams when concrete cover delamination is the governing failure mode. A moment–curvature (M–χ) relationship formed by three linear branches corresponding to the precracking, postcracking, and postyielding stages is established by considering the four critical M–χ points that characterize the flexural behavior of CFRP strengthened beams. Two additional M–χ points, namely, concrete decompression and steel decompression, are also defined to assess the initial effects of the prestress force applied by the FRP reinforcement. The mid-span deflection of the beams is predicted based on the curvature approach, assuming a linear curvature variation between the critical points along the beam length. The good predictive performance of the analytical model is appraised by simulating the force–deflection response registered in experimental programs composed of RC beams strengthened with prestressed NSM CFRP reinforcements.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015-01-01T00:00:00Z
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/1822/38274
url http://hdl.handle.net/1822/38274
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Rezazadeh, M., Barros, J. A. O., & Costa, I. (2015). Analytical approach for the flexural analysis of RC beams strengthened with prestressed CFRP. Composites Part B-Engineering, 73, 16-34. doi: 10.1016/j.compositesb.2014.12.016
1359-8368
10.1016/j.compositesb.2014.12.016
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 Elsevier
publisher.none.fl_str_mv Elsevier
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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection 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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