Simultaneous flexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminates

Detalhes bibliográficos
Autor(a) principal: Barros, Joaquim A. O.
Data de Publicação: 2017
Outros Autores: Rezazadeh, Mohammadali, Laranjeira, J. P. S., Hosseini, M. R. M., Mastali, Mohammad, Ramezansefat, H.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/45426
Resumo: One of the main concerns related to flat reinforced-concrete (RC) slabs is the slab’s punching capacity. Punching can occur not only due to a deficient transverse reinforcement, but also when the flexural capacity of the slab needs to be increased. To increase the flexural capacity, carbon-fiber-reinforced-polymer (CFRP) composites have been applied according to near-surface-mounted (NSM) or external-bonded-reinforcement (EBR) techniques, while for the punching strengthening CFRP reinforcements have been applied according to embedded-through-section (ETS) technique. To take advantage of strengthening benefits of the NSM and ETS techniques, in the present paper a new type of CFRP laminate of U-shape is used by adopting a novel hybrid technique for the simultaneous flexural and punching strengthening of existing RC slabs. Besides, this hybrid technique aims to provide a better bond performance for the ETS and NSM CFRPs by improving the anchorage conditions. Moreover, a higher resistance to the susceptibility of occurrence of other premature failure modes, like concrete cover delamination, is offered by using this hybrid technique. A 3D nonlinear finite-element (FE) model is developed to simulate the experimental tests by considering the nonlinear behavior of the constituent materials. The experimental program and numerical model are described, and the relevant results are analyzed.
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spelling Simultaneous flexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminatesFlexural strengtheningpunching shear strengtheningRC slabsCFRP reinforcementFE modelEngenharia e Tecnologia::Engenharia CivilScience & TechnologyOne of the main concerns related to flat reinforced-concrete (RC) slabs is the slab’s punching capacity. Punching can occur not only due to a deficient transverse reinforcement, but also when the flexural capacity of the slab needs to be increased. To increase the flexural capacity, carbon-fiber-reinforced-polymer (CFRP) composites have been applied according to near-surface-mounted (NSM) or external-bonded-reinforcement (EBR) techniques, while for the punching strengthening CFRP reinforcements have been applied according to embedded-through-section (ETS) technique. To take advantage of strengthening benefits of the NSM and ETS techniques, in the present paper a new type of CFRP laminate of U-shape is used by adopting a novel hybrid technique for the simultaneous flexural and punching strengthening of existing RC slabs. Besides, this hybrid technique aims to provide a better bond performance for the ETS and NSM CFRPs by improving the anchorage conditions. Moreover, a higher resistance to the susceptibility of occurrence of other premature failure modes, like concrete cover delamination, is offered by using this hybrid technique. A 3D nonlinear finite-element (FE) model is developed to simulate the experimental tests by considering the nonlinear behavior of the constituent materials. The experimental program and numerical model are described, and the relevant results are analyzed.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.info:eu-repo/semantics/publishedVersionElsevierUniversidade do MinhoBarros, Joaquim A. O.Rezazadeh, MohammadaliLaranjeira, J. P. S.Hosseini, M. R. M.Mastali, MohammadRamezansefat, H.2017-012017-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/45426eng0263-82231879-108510.1016/j.compstruct.2016.10.009http://www.sciencedirect.com/science/article/pii/S0263822316320670info: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:RCAAP2023-07-21T12:51:20Zoai:repositorium.sdum.uminho.pt:1822/45426Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:50:12.837510Repositório 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 Simultaneous flexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminates
title Simultaneous flexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminates
spellingShingle Simultaneous flexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminates
Barros, Joaquim A. O.
Flexural strengthening
punching shear strengthening
RC slabs
CFRP reinforcement
FE model
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
title_short Simultaneous flexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminates
title_full Simultaneous flexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminates
title_fullStr Simultaneous flexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminates
title_full_unstemmed Simultaneous flexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminates
title_sort Simultaneous flexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminates
author Barros, Joaquim A. O.
author_facet Barros, Joaquim A. O.
Rezazadeh, Mohammadali
Laranjeira, J. P. S.
Hosseini, M. R. M.
Mastali, Mohammad
Ramezansefat, H.
author_role author
author2 Rezazadeh, Mohammadali
Laranjeira, J. P. S.
Hosseini, M. R. M.
Mastali, Mohammad
Ramezansefat, H.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Barros, Joaquim A. O.
Rezazadeh, Mohammadali
Laranjeira, J. P. S.
Hosseini, M. R. M.
Mastali, Mohammad
Ramezansefat, H.
dc.subject.por.fl_str_mv Flexural strengthening
punching shear strengthening
RC slabs
CFRP reinforcement
FE model
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
topic Flexural strengthening
punching shear strengthening
RC slabs
CFRP reinforcement
FE model
Engenharia e Tecnologia::Engenharia Civil
Science & Technology
description One of the main concerns related to flat reinforced-concrete (RC) slabs is the slab’s punching capacity. Punching can occur not only due to a deficient transverse reinforcement, but also when the flexural capacity of the slab needs to be increased. To increase the flexural capacity, carbon-fiber-reinforced-polymer (CFRP) composites have been applied according to near-surface-mounted (NSM) or external-bonded-reinforcement (EBR) techniques, while for the punching strengthening CFRP reinforcements have been applied according to embedded-through-section (ETS) technique. To take advantage of strengthening benefits of the NSM and ETS techniques, in the present paper a new type of CFRP laminate of U-shape is used by adopting a novel hybrid technique for the simultaneous flexural and punching strengthening of existing RC slabs. Besides, this hybrid technique aims to provide a better bond performance for the ETS and NSM CFRPs by improving the anchorage conditions. Moreover, a higher resistance to the susceptibility of occurrence of other premature failure modes, like concrete cover delamination, is offered by using this hybrid technique. A 3D nonlinear finite-element (FE) model is developed to simulate the experimental tests by considering the nonlinear behavior of the constituent materials. The experimental program and numerical model are described, and the relevant results are analyzed.
publishDate 2017
dc.date.none.fl_str_mv 2017-01
2017-01-01T00:00:00Z
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/1822/45426
url http://hdl.handle.net/1822/45426
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0263-8223
1879-1085
10.1016/j.compstruct.2016.10.009
http://www.sciencedirect.com/science/article/pii/S0263822316320670
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
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