Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips

Detalhes bibliográficos
Autor(a) principal: Garzon-Roca, Julio
Data de Publicação: 2015
Outros Autores: Sena-Cruz, José, Fernandes, Pedro, Xavier, José
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/38172
Resumo: The near-surface mounted (NSM) strengthening technique is capable of effectively increase the bearing capacity of structural concrete elements. This technique which basically consists of placing FRP reinforcements inside small grooves cut in the concrete cover, has been widely investigated in terms of structural performance and ability to improve the flexural and shear behaviour of reinforced concrete beams and columns. However, little research has been carried out concerning to the NSM long-term performance and durability. Motivated by the need of increasing the knowledge on the expected durability of the NSM technique using CFRP laminates, this paper presents an experimental program in which direct pull-out tests are carried out for evaluating the bond behaviour of specimens aged through wet-dry cycles. A total of 30 specimens are tested, analysing the effect of the bond length, the groove width, the groove depth and the aging effect on the bond behaviour. Digital image correlation method is also used to identify the bond resistant mechanism developed in an element strengthened using NSM technique. Finally, using the experimental results, an analytical–numerical strategy is applied to establish the local bond stress–slip relationship.
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spelling Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate stripsCarbon fibre reinforced polymerNSMDigital Image CorrelationConcreteInverse analysisBondingEngenharia e Tecnologia::Engenharia CivilScience & TechnologyThe near-surface mounted (NSM) strengthening technique is capable of effectively increase the bearing capacity of structural concrete elements. This technique which basically consists of placing FRP reinforcements inside small grooves cut in the concrete cover, has been widely investigated in terms of structural performance and ability to improve the flexural and shear behaviour of reinforced concrete beams and columns. However, little research has been carried out concerning to the NSM long-term performance and durability. Motivated by the need of increasing the knowledge on the expected durability of the NSM technique using CFRP laminates, this paper presents an experimental program in which direct pull-out tests are carried out for evaluating the bond behaviour of specimens aged through wet-dry cycles. A total of 30 specimens are tested, analysing the effect of the bond length, the groove width, the groove depth and the aging effect on the bond behaviour. Digital image correlation method is also used to identify the bond resistant mechanism developed in an element strengthened using NSM technique. Finally, using the experimental results, an analytical–numerical strategy is applied to establish the local bond stress–slip relationship.This work was supported by FEDER funds through the Operational Program for Competitiveness Factors - COMPETE and National Funds through FCT - Portuguese Foundation for Science and Technology under the project CutInDur PTDC/ECM/112396/2009. The third author acknowledge the grant SFRH/BD/80338/2011 provided by FCT. Finally, the authors also like to thank all the companies that have been involved supporting and contributing for the development of this study, mainly S&P Clever Reinforcement Iberica Lda. and SECIL.ElsevierUniversidade do MinhoGarzon-Roca, JulioSena-Cruz, JoséFernandes, PedroXavier, José2015-112015-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/38172engGarzón-Roca, J., Sena-Cruz, J. M., Fernandes, P., & Xavier, J. (2015). Effect of wet-dry cycles on the bond behavior of concrete elements strengthened with NSM CFRP laminate strips. Composite Structures 132, 331–3400263-822310.1016/j.compstruct.2015.05.053http://www.sciencedirect.com/science/article/pii/S0263822315004274info: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:RCAAP2023-07-21T12:11:33Zoai:repositorium.sdum.uminho.pt:1822/38172Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:03:19.958811Repositório 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 Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips
title Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips
spellingShingle Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips
Garzon-Roca, Julio
Carbon fibre reinforced polymer
NSM
Digital Image Correlation
Concrete
Inverse analysis
Bonding
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
title_short Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips
title_full Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips
title_fullStr Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips
title_full_unstemmed Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips
title_sort Effect of wet-dry cycles on the bond behaviour of concrete elements strengthened with NSM CFRP laminate strips
author Garzon-Roca, Julio
author_facet Garzon-Roca, Julio
Sena-Cruz, José
Fernandes, Pedro
Xavier, José
author_role author
author2 Sena-Cruz, José
Fernandes, Pedro
Xavier, José
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Garzon-Roca, Julio
Sena-Cruz, José
Fernandes, Pedro
Xavier, José
dc.subject.por.fl_str_mv Carbon fibre reinforced polymer
NSM
Digital Image Correlation
Concrete
Inverse analysis
Bonding
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
topic Carbon fibre reinforced polymer
NSM
Digital Image Correlation
Concrete
Inverse analysis
Bonding
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
description The near-surface mounted (NSM) strengthening technique is capable of effectively increase the bearing capacity of structural concrete elements. This technique which basically consists of placing FRP reinforcements inside small grooves cut in the concrete cover, has been widely investigated in terms of structural performance and ability to improve the flexural and shear behaviour of reinforced concrete beams and columns. However, little research has been carried out concerning to the NSM long-term performance and durability. Motivated by the need of increasing the knowledge on the expected durability of the NSM technique using CFRP laminates, this paper presents an experimental program in which direct pull-out tests are carried out for evaluating the bond behaviour of specimens aged through wet-dry cycles. A total of 30 specimens are tested, analysing the effect of the bond length, the groove width, the groove depth and the aging effect on the bond behaviour. Digital image correlation method is also used to identify the bond resistant mechanism developed in an element strengthened using NSM technique. Finally, using the experimental results, an analytical–numerical strategy is applied to establish the local bond stress–slip relationship.
publishDate 2015
dc.date.none.fl_str_mv 2015-11
2015-11-01T00:00:00Z
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/1822/38172
url http://hdl.handle.net/1822/38172
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Garzón-Roca, J., Sena-Cruz, J. M., Fernandes, P., & Xavier, J. (2015). Effect of wet-dry cycles on the bond behavior of concrete elements strengthened with NSM CFRP laminate strips. Composite Structures 132, 331–340
0263-8223
10.1016/j.compstruct.2015.05.053
http://www.sciencedirect.com/science/article/pii/S0263822315004274
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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