End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approach
Autor(a) principal: | |
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Data de Publicação: | 2016 |
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/1822/43670 |
Resumo: | Fiber-reinforced-polymer (FRP) composite materials applied according to the near-surface-mounted (NSM) technique are very effective for the flexural strengthening of reinforced-concrete (RC) structures. However, the flexural strengthening effectiveness of this NSM technique is sometimes compromised by end concrete cover separation (CCS) failure, which is a premature failure before occurring the conventional flexural failure modes. Due to the complexity of this failure mode, no analytical approach, with a design framework for its accurate prediction, was published despite the available experimental results on this premature failure. In the present study, a novel simplified analytical approach is developed based on a closed form solution for an almost accurate prediction of CCS failure in RC structures strengthened in flexure with NSM FRP reinforcement. After demonstrating the good predictive performance of the proposed model, it was used for executing parametric studies in order to evaluate the influence of the material properties and FRP strengthening configuration on the susceptibility of occurring the CCS failure. At the end, regarding to the FRP strengthening configuration, some design recommendations were proposed to maximize the resistance of NSM FRP strengthened structures to the susceptibility of occurring the CCS failure. |
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End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approachAnalytical approachconcrete cover separationFRP composite materialsNSM techniqueScience & TechnologyFiber-reinforced-polymer (FRP) composite materials applied according to the near-surface-mounted (NSM) technique are very effective for the flexural strengthening of reinforced-concrete (RC) structures. However, the flexural strengthening effectiveness of this NSM technique is sometimes compromised by end concrete cover separation (CCS) failure, which is a premature failure before occurring the conventional flexural failure modes. Due to the complexity of this failure mode, no analytical approach, with a design framework for its accurate prediction, was published despite the available experimental results on this premature failure. In the present study, a novel simplified analytical approach is developed based on a closed form solution for an almost accurate prediction of CCS failure in RC structures strengthened in flexure with NSM FRP reinforcement. After demonstrating the good predictive performance of the proposed model, it was used for executing parametric studies in order to evaluate the influence of the material properties and FRP strengthening configuration on the susceptibility of occurring the CCS failure. At the end, regarding to the FRP strengthening configuration, some design recommendations were proposed to maximize the resistance of NSM FRP strengthened structures to the susceptibility of occurring the CCS failure.The authors acknowledge the financial support provided by QREN (through the Operational Program COMPETE) in the scope of the CutInov Project (n. 38780) involving the Clever Reinforcement Company and the Structural Composites Research group of ISISE-Minho University.Elsevier Sci LtdUniversidade do MinhoRezazadeh, MohammadaliBarros, Joaquim A. O.Ramezansefat, H.2016-122016-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/43670engRezazadeh, M., Barros, J. A. O., & Ramezansefat, H. (2016). End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approach. [Article]. Engineering Structures, 128, 415-427. doi: 10.1016/j.engstruct.2016.09.0620141-029610.1016/j.engstruct.2016.09.062info: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:RCAAP2023-07-21T12:12:28Zoai:repositorium.sdum.uminho.pt:1822/43670Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:04:23.421941Repositório 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 |
End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approach |
title |
End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approach |
spellingShingle |
End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approach Rezazadeh, Mohammadali Analytical approach concrete cover separation FRP composite materials NSM technique Science & Technology |
title_short |
End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approach |
title_full |
End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approach |
title_fullStr |
End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approach |
title_full_unstemmed |
End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approach |
title_sort |
End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approach |
author |
Rezazadeh, Mohammadali |
author_facet |
Rezazadeh, Mohammadali Barros, Joaquim A. O. Ramezansefat, H. |
author_role |
author |
author2 |
Barros, Joaquim A. O. Ramezansefat, H. |
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. Ramezansefat, H. |
dc.subject.por.fl_str_mv |
Analytical approach concrete cover separation FRP composite materials NSM technique Science & Technology |
topic |
Analytical approach concrete cover separation FRP composite materials NSM technique Science & Technology |
description |
Fiber-reinforced-polymer (FRP) composite materials applied according to the near-surface-mounted (NSM) technique are very effective for the flexural strengthening of reinforced-concrete (RC) structures. However, the flexural strengthening effectiveness of this NSM technique is sometimes compromised by end concrete cover separation (CCS) failure, which is a premature failure before occurring the conventional flexural failure modes. Due to the complexity of this failure mode, no analytical approach, with a design framework for its accurate prediction, was published despite the available experimental results on this premature failure. In the present study, a novel simplified analytical approach is developed based on a closed form solution for an almost accurate prediction of CCS failure in RC structures strengthened in flexure with NSM FRP reinforcement. After demonstrating the good predictive performance of the proposed model, it was used for executing parametric studies in order to evaluate the influence of the material properties and FRP strengthening configuration on the susceptibility of occurring the CCS failure. At the end, regarding to the FRP strengthening configuration, some design recommendations were proposed to maximize the resistance of NSM FRP strengthened structures to the susceptibility of occurring the CCS failure. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-12 2016-12-01T00:00:00Z |
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/1822/43670 |
url |
http://hdl.handle.net/1822/43670 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Rezazadeh, M., Barros, J. A. O., & Ramezansefat, H. (2016). End concrete cover separation in RC structures strengthened in flexure with NSM FRP: Analytical design approach. [Article]. Engineering Structures, 128, 415-427. doi: 10.1016/j.engstruct.2016.09.062 0141-0296 10.1016/j.engstruct.2016.09.062 |
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 Sci Ltd |
publisher.none.fl_str_mv |
Elsevier Sci Ltd |
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 |
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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1799132453589221376 |