Bond and flexural behavior of concrete elements strengthened with NSM CFRP laminate strips under fatigue loading

Detalhes bibliográficos
Autor(a) principal: Fernandes, Pedro Miguel Gomes
Data de Publicação: 2015
Outros Autores: Silva, Patrícia, Sena-Cruz, 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/1822/32870
Resumo: This paper presents the results of an experimental research on bond and flexural behavior of concrete elements strengthened with carbon fiber reinforced polymer (CFRP) laminate strips under fatigue loading conditions, applied according to the near-surface mounted (NSM) strengthening technique. Long-term performance of the NSM system could be compromised by fatigue loading, which may result in deterioration and weakening of individual components (steel, FRP, concrete), or loss of bond performance and composite action. Hence, an experimental program composed of direct pullout tests and slab specimens was carried out to evaluate the influence of the stress level and amplitude of cycles imposed to the specimens. In bond fatigue tests, debonding failure occurred for a maximum stress level corresponding to 60% of the ultimate bond load obtained from monotonic loading. The fatigue loading imposed on the slabs did not yield to its failure. Consequently, the load carrying capacity obtained from post-fatigue tests of strengthened slabs was not significantly affected by this action.
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spelling Bond and flexural behavior of concrete elements strengthened with NSM CFRP laminate strips under fatigue loadingFatigueBond and flexural behaviorNear-surface mounted (NSM)Carbon fiber reinforced polymer (CFRP)Stress levelEngenharia e Tecnologia::Engenharia CivilScience & TechnologyThis paper presents the results of an experimental research on bond and flexural behavior of concrete elements strengthened with carbon fiber reinforced polymer (CFRP) laminate strips under fatigue loading conditions, applied according to the near-surface mounted (NSM) strengthening technique. Long-term performance of the NSM system could be compromised by fatigue loading, which may result in deterioration and weakening of individual components (steel, FRP, concrete), or loss of bond performance and composite action. Hence, an experimental program composed of direct pullout tests and slab specimens was carried out to evaluate the influence of the stress level and amplitude of cycles imposed to the specimens. In bond fatigue tests, debonding failure occurred for a maximum stress level corresponding to 60% of the ultimate bond load obtained from monotonic loading. The fatigue loading imposed on the slabs did not yield to its failure. Consequently, the load carrying capacity obtained from post-fatigue tests of strengthened slabs was not significantly affected by this action.This work is 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 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., Casais - Engenharia & Construcao S.A., Artecanter - Industria de Transformacao de Granitos, Lda., Tecnipor - Gomes & Taveira Lda., Vialam - Industrias Metalurgicas e Metalomecanicas, Lda., Hilti Portugal-Produtos e Servicos, Lda., Novo Modelo Europa, S.A., Sika Portugal - Produtos Construcao e Industria, and S.A., Cachapuz - Equipamentos para Pesagem, Lda. The first and second authors wishes also to acknowledge the Grants SFRH/BD/80338/2011 and SFRH/BD/89768/2012, respectively, provided by FCT.ElsevierUniversidade do MinhoFernandes, Pedro Miguel GomesSilva, PatríciaSena-Cruz, José20152015-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/32870eng0141-029610.1016/j.engstruct.2014.11.039info: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:RCAAP2023-07-21T11:55:57Zoai:repositorium.sdum.uminho.pt:1822/32870Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:45:32.561235Repositório 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 and flexural behavior of concrete elements strengthened with NSM CFRP laminate strips under fatigue loading
title Bond and flexural behavior of concrete elements strengthened with NSM CFRP laminate strips under fatigue loading
spellingShingle Bond and flexural behavior of concrete elements strengthened with NSM CFRP laminate strips under fatigue loading
Fernandes, Pedro Miguel Gomes
Fatigue
Bond and flexural behavior
Near-surface mounted (NSM)
Carbon fiber reinforced polymer (CFRP)
Stress level
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
title_short Bond and flexural behavior of concrete elements strengthened with NSM CFRP laminate strips under fatigue loading
title_full Bond and flexural behavior of concrete elements strengthened with NSM CFRP laminate strips under fatigue loading
title_fullStr Bond and flexural behavior of concrete elements strengthened with NSM CFRP laminate strips under fatigue loading
title_full_unstemmed Bond and flexural behavior of concrete elements strengthened with NSM CFRP laminate strips under fatigue loading
title_sort Bond and flexural behavior of concrete elements strengthened with NSM CFRP laminate strips under fatigue loading
author Fernandes, Pedro Miguel Gomes
author_facet Fernandes, Pedro Miguel Gomes
Silva, Patrícia
Sena-Cruz, José
author_role author
author2 Silva, Patrícia
Sena-Cruz, José
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Fernandes, Pedro Miguel Gomes
Silva, Patrícia
Sena-Cruz, José
dc.subject.por.fl_str_mv Fatigue
Bond and flexural behavior
Near-surface mounted (NSM)
Carbon fiber reinforced polymer (CFRP)
Stress level
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
topic Fatigue
Bond and flexural behavior
Near-surface mounted (NSM)
Carbon fiber reinforced polymer (CFRP)
Stress level
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
description This paper presents the results of an experimental research on bond and flexural behavior of concrete elements strengthened with carbon fiber reinforced polymer (CFRP) laminate strips under fatigue loading conditions, applied according to the near-surface mounted (NSM) strengthening technique. Long-term performance of the NSM system could be compromised by fatigue loading, which may result in deterioration and weakening of individual components (steel, FRP, concrete), or loss of bond performance and composite action. Hence, an experimental program composed of direct pullout tests and slab specimens was carried out to evaluate the influence of the stress level and amplitude of cycles imposed to the specimens. In bond fatigue tests, debonding failure occurred for a maximum stress level corresponding to 60% of the ultimate bond load obtained from monotonic loading. The fatigue loading imposed on the slabs did not yield to its failure. Consequently, the load carrying capacity obtained from post-fatigue tests of strengthened slabs was not significantly affected by this action.
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/1822/32870
url http://hdl.handle.net/1822/32870
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0141-0296
10.1016/j.engstruct.2014.11.039
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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