Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives
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: | https://hdl.handle.net/1822/68150 |
Resumo: | The influence of the adhesive type on bond behaviour between concrete and Carbon Fibre Reinforced Polymers (CFRP) laminate strips, in the context of Near Surface Mounted (NSM) strengthening technique, is considered as crucial for an efficient design. Thus, direct pullout tests were carried out to assess the influence of i) type of adhesive ii) CFRP cross-section and (iii) bond length on behaviour of NSM-CFRP system. Two types of stiff adhesives and one type of flexible adhesive were studied. For similar bond lengths, significantly higher maximum pullout force and bond stiffness were observed in the case of stiff adhesives, while noticeably higher slip at maximum force was achieved with the flexible adhesive. Analytical and numerical investigations were carried out in order to determine the local bond stress-slip relationships for both stiff and flexible adhesives. After demonstrating its good predictive performance, the analytical approach was used to design curves of the required anchorage lengths of NSM-CFRP system at ultimate limit state conditions. For the analytically calibrated mechanical parameters of NSM bond-slip law a two-dimensional numerical model of the direct pullout tests was worked out. |
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Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesivesCFRP composite materialsNSM techniqueStiff and flexible adhesivesBond behaviourAnalytical modelNumerical simulationsSimple uncoupled interface modelEngenharia e Tecnologia::Engenharia CivilScience & TechnologyThe influence of the adhesive type on bond behaviour between concrete and Carbon Fibre Reinforced Polymers (CFRP) laminate strips, in the context of Near Surface Mounted (NSM) strengthening technique, is considered as crucial for an efficient design. Thus, direct pullout tests were carried out to assess the influence of i) type of adhesive ii) CFRP cross-section and (iii) bond length on behaviour of NSM-CFRP system. Two types of stiff adhesives and one type of flexible adhesive were studied. For similar bond lengths, significantly higher maximum pullout force and bond stiffness were observed in the case of stiff adhesives, while noticeably higher slip at maximum force was achieved with the flexible adhesive. Analytical and numerical investigations were carried out in order to determine the local bond stress-slip relationships for both stiff and flexible adhesives. After demonstrating its good predictive performance, the analytical approach was used to design curves of the required anchorage lengths of NSM-CFRP system at ultimate limit state conditions. For the analytically calibrated mechanical parameters of NSM bond-slip law a two-dimensional numerical model of the direct pullout tests was worked out.PTDC/ECMEST/1282/2014; POCI-01-0145-FEDER-016900; POCI-01-0145-FEDER-007633; SFRH/BD/131259/2017; SFRH/BSAB/150266/2019. FEDER funds through the Operational Program for Competitiveness Factors – COMPETE and National Funds through FCT (Portuguese Foundation for Science and Technology) under the project FRPLongDur POCI-01-0145-FEDER-016900 (FCT PTDC/ECMEST/1282/2014) and partly financed by the project POCI-01-0145-FEDER-007633. The first and second authors acknowledge the grants SFRH/BD/131259/2017 and SFRH/BSAB/150266/2019 provided by FCT, respectively, financed by European Social Fund and by national funds through the FCT/MCTES.ElsevierUniversidade do MinhoRicardo Cruz, JoséSena-Cruz, JoséRezazadeh, MohammadaliSeręga, SzymonPereira, EduardoKwiecień, ArkadiuszZając, Bogusław2020-112020-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/68150engCruz, J. R., Sena-Cruz, J., Rezazadeh, M., Seręga, S., Pereira, E., Kwiecień, A., & Zając, B. (2020). Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives. Composite Structures, 1123690263-82231879-108510.1016/j.compstruct.2020.112369https://www.sciencedirect.com/science/article/pii/S0263822319347737info: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:RCAAP2023-10-07T01:21:56Zoai:repositorium.sdum.uminho.pt:1822/68150Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:30:51.718545Repositório 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 |
Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives |
title |
Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives |
spellingShingle |
Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives Ricardo Cruz, José CFRP composite materials NSM technique Stiff and flexible adhesives Bond behaviour Analytical model Numerical simulations Simple uncoupled interface model Engenharia e Tecnologia::Engenharia Civil Science & Technology |
title_short |
Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives |
title_full |
Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives |
title_fullStr |
Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives |
title_full_unstemmed |
Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives |
title_sort |
Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives |
author |
Ricardo Cruz, José |
author_facet |
Ricardo Cruz, José Sena-Cruz, José Rezazadeh, Mohammadali Seręga, Szymon Pereira, Eduardo Kwiecień, Arkadiusz Zając, Bogusław |
author_role |
author |
author2 |
Sena-Cruz, José Rezazadeh, Mohammadali Seręga, Szymon Pereira, Eduardo Kwiecień, Arkadiusz Zając, Bogusław |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Ricardo Cruz, José Sena-Cruz, José Rezazadeh, Mohammadali Seręga, Szymon Pereira, Eduardo Kwiecień, Arkadiusz Zając, Bogusław |
dc.subject.por.fl_str_mv |
CFRP composite materials NSM technique Stiff and flexible adhesives Bond behaviour Analytical model Numerical simulations Simple uncoupled interface model Engenharia e Tecnologia::Engenharia Civil Science & Technology |
topic |
CFRP composite materials NSM technique Stiff and flexible adhesives Bond behaviour Analytical model Numerical simulations Simple uncoupled interface model Engenharia e Tecnologia::Engenharia Civil Science & Technology |
description |
The influence of the adhesive type on bond behaviour between concrete and Carbon Fibre Reinforced Polymers (CFRP) laminate strips, in the context of Near Surface Mounted (NSM) strengthening technique, is considered as crucial for an efficient design. Thus, direct pullout tests were carried out to assess the influence of i) type of adhesive ii) CFRP cross-section and (iii) bond length on behaviour of NSM-CFRP system. Two types of stiff adhesives and one type of flexible adhesive were studied. For similar bond lengths, significantly higher maximum pullout force and bond stiffness were observed in the case of stiff adhesives, while noticeably higher slip at maximum force was achieved with the flexible adhesive. Analytical and numerical investigations were carried out in order to determine the local bond stress-slip relationships for both stiff and flexible adhesives. After demonstrating its good predictive performance, the analytical approach was used to design curves of the required anchorage lengths of NSM-CFRP system at ultimate limit state conditions. For the analytically calibrated mechanical parameters of NSM bond-slip law a two-dimensional numerical model of the direct pullout tests was worked out. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-11 2020-11-01T00:00:00Z |
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 |
https://hdl.handle.net/1822/68150 |
url |
https://hdl.handle.net/1822/68150 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Cruz, J. R., Sena-Cruz, J., Rezazadeh, M., Seręga, S., Pereira, E., Kwiecień, A., & Zając, B. (2020). Bond behaviour of NSM CFRP laminate strip systems in concrete using stiff and flexible adhesives. Composite Structures, 112369 0263-8223 1879-1085 10.1016/j.compstruct.2020.112369 https://www.sciencedirect.com/science/article/pii/S0263822319347737 |
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 |
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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 |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799132814497546240 |