A novel design model for predicting the shear resistance of reinforced concrete beams strengthened with EBR-CFRP systems

Detalhes bibliográficos
Autor(a) principal: Mohammadi, Amir Hossein
Data de Publicação: 2024
Outros Autores: Barros, Joaquim A. O., Sena-Cruz, José
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/1822/88670
Resumo: Shear resistance prediction of reinforced concrete (RC) beams strengthened with externally bonded reinforcements (EBR) is a challenging task due to the complex nature of shear resisting mechanisms and their intricate interaction. Existing design models often overlook these dependencies, leading to significant variations in prediction accuracy. In this paper, a design model is proposed by integrating the most relevant shear resisting mechanisms based on the evidence demonstrated by a large database of experimental results from RC beams shear strengthened with wet layup carbon fibre reinforced (CFRP) sheets applied according to the EBR technique. The developed approach integrates the simplified modified compression field theory (SMCFT) with a regressionbased model. A global sensitivity analysis was conducted according to which closed form equations were derived to obtain the tensile stress factor in cracked concrete and the inclination angle of the critical diagonal crack. A reliability analysis is carried out, and resistance reduction factors are achieved for different levels of reliability index. The database, composed of 284 RC beams shear strengthened with EBR-CFRP technique, is utilized to validate the proposed model, and compare its performance against some well-established existing design models. The results show that the proposed model, with an adequate framework for its use on design practice, outperforms the other considered models.
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spelling A novel design model for predicting the shear resistance of reinforced concrete beams strengthened with EBR-CFRP systemsDesign modelShear strengtheningReinforced concrete beamsExternally bonded reinforcementsFRPReliability analysisEngenharia e Tecnologia::Engenharia CivilShear resistance prediction of reinforced concrete (RC) beams strengthened with externally bonded reinforcements (EBR) is a challenging task due to the complex nature of shear resisting mechanisms and their intricate interaction. Existing design models often overlook these dependencies, leading to significant variations in prediction accuracy. In this paper, a design model is proposed by integrating the most relevant shear resisting mechanisms based on the evidence demonstrated by a large database of experimental results from RC beams shear strengthened with wet layup carbon fibre reinforced (CFRP) sheets applied according to the EBR technique. The developed approach integrates the simplified modified compression field theory (SMCFT) with a regressionbased model. A global sensitivity analysis was conducted according to which closed form equations were derived to obtain the tensile stress factor in cracked concrete and the inclination angle of the critical diagonal crack. A reliability analysis is carried out, and resistance reduction factors are achieved for different levels of reliability index. The database, composed of 284 RC beams shear strengthened with EBR-CFRP technique, is utilized to validate the proposed model, and compare its performance against some well-established existing design models. The results show that the proposed model, with an adequate framework for its use on design practice, outperforms the other considered models.This study is a part of the project “Sticker –Innovative technique for the structural strengthening based on using CFRP laminates with multifunctional attributes and applied with advanced cement adhesives”, with the reference POCI-01-0247-FEDER-039755. The first author also acknowledges the support provided by FCT PhD individual fellowship with the reference of 2020.08876.BD. This work was partly financed by FCT / MCTES through national funds (PIDDAC) under the R&D Unit Institute for Sustainability and Innovation in Structural Engineering (ISISE), under reference UIDB/04029/2020 (doi.org/10.54499/UIDB/04029/2020), and under the Associate Laboratory Advanced Production and Intelligent Systems ARISE under reference LA/P/0112/2020.ElsevierUniversidade do MinhoMohammadi, Amir HosseinBarros, Joaquim A. O.Sena-Cruz, José20242024-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/88670eng0263-82231879-108510.1016/j.compstruct.2024.117901https://www.sciencedirect.com/science/article/pii/S0263822324000291info: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:RCAAP2024-02-10T01:21:08Zoai:repositorium.sdum.uminho.pt:1822/88670Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:37:18.261240Repositório 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 A novel design model for predicting the shear resistance of reinforced concrete beams strengthened with EBR-CFRP systems
title A novel design model for predicting the shear resistance of reinforced concrete beams strengthened with EBR-CFRP systems
spellingShingle A novel design model for predicting the shear resistance of reinforced concrete beams strengthened with EBR-CFRP systems
Mohammadi, Amir Hossein
Design model
Shear strengthening
Reinforced concrete beams
Externally bonded reinforcements
FRP
Reliability analysis
Engenharia e Tecnologia::Engenharia Civil
title_short A novel design model for predicting the shear resistance of reinforced concrete beams strengthened with EBR-CFRP systems
title_full A novel design model for predicting the shear resistance of reinforced concrete beams strengthened with EBR-CFRP systems
title_fullStr A novel design model for predicting the shear resistance of reinforced concrete beams strengthened with EBR-CFRP systems
title_full_unstemmed A novel design model for predicting the shear resistance of reinforced concrete beams strengthened with EBR-CFRP systems
title_sort A novel design model for predicting the shear resistance of reinforced concrete beams strengthened with EBR-CFRP systems
author Mohammadi, Amir Hossein
author_facet Mohammadi, Amir Hossein
Barros, Joaquim A. O.
Sena-Cruz, José
author_role author
author2 Barros, Joaquim A. O.
Sena-Cruz, José
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Mohammadi, Amir Hossein
Barros, Joaquim A. O.
Sena-Cruz, José
dc.subject.por.fl_str_mv Design model
Shear strengthening
Reinforced concrete beams
Externally bonded reinforcements
FRP
Reliability analysis
Engenharia e Tecnologia::Engenharia Civil
topic Design model
Shear strengthening
Reinforced concrete beams
Externally bonded reinforcements
FRP
Reliability analysis
Engenharia e Tecnologia::Engenharia Civil
description Shear resistance prediction of reinforced concrete (RC) beams strengthened with externally bonded reinforcements (EBR) is a challenging task due to the complex nature of shear resisting mechanisms and their intricate interaction. Existing design models often overlook these dependencies, leading to significant variations in prediction accuracy. In this paper, a design model is proposed by integrating the most relevant shear resisting mechanisms based on the evidence demonstrated by a large database of experimental results from RC beams shear strengthened with wet layup carbon fibre reinforced (CFRP) sheets applied according to the EBR technique. The developed approach integrates the simplified modified compression field theory (SMCFT) with a regressionbased model. A global sensitivity analysis was conducted according to which closed form equations were derived to obtain the tensile stress factor in cracked concrete and the inclination angle of the critical diagonal crack. A reliability analysis is carried out, and resistance reduction factors are achieved for different levels of reliability index. The database, composed of 284 RC beams shear strengthened with EBR-CFRP technique, is utilized to validate the proposed model, and compare its performance against some well-established existing design models. The results show that the proposed model, with an adequate framework for its use on design practice, outperforms the other considered models.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024-01-01T00:00:00Z
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 https://hdl.handle.net/1822/88670
url https://hdl.handle.net/1822/88670
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0263-8223
1879-1085
10.1016/j.compstruct.2024.117901
https://www.sciencedirect.com/science/article/pii/S0263822324000291
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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