Simultaneous flexural and punching strengthening of RC slabs according to a new hybrid technique using U-shape CFRP laminates
Autor(a) principal: | |
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Data de Publicação: | 2017 |
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/1822/45426 |
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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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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
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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