Punching CFRP-based strengthening solutions for reinforced concrete flat slabs
Autor(a) principal: | |
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Data de Publicação: | 2019 |
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/1822/71745 |
Resumo: | This paper presents an experimental research program on the punching strengthening of flat reinforced concrete (RC) slabs with carbon fibre reinforced polymer (CFRP) systems. The strengthening system consists of CFRP wet layup sheets that are installed into holes opened orthogonally to the RC slab, and bonded to the surrounding substract with epoxy adhesive. Two different techniques were adopted: one where the CFRP system fully wraps two consecutive holes, forming a close type stirrup; the second is formed by a type of flexible CFRP bar installed into each hole, working like a dowel. The experimental program is composed of 12 real scale prototypes representative of RC slab-column connection (2500 × 2500 mm plan dimensions and 180 mm thickness). One of the prototypes was not strengthened for constituting the reference specimen, while the others were strengthened by adopting different arrangements for the strengthening systems, namely the pattern of the holes (cross versus radial), number of strengthening perimeters, holes per perimeter and CFRP cross sectional area per perimeter. A maximum increase of punching capacity of 67% was obtained by using the proposed strengthening techniques, having been possible to convert brittle punching failure into a ductile flexure one with the most effective punching strengthening configurations |
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Punching CFRP-based strengthening solutions for reinforced concrete flat slabsPunching strengtheningCFRPReinforced concrete slabsExperimental testsEngenharia e Tecnologia::Engenharia CivilScience & TechnologyThis paper presents an experimental research program on the punching strengthening of flat reinforced concrete (RC) slabs with carbon fibre reinforced polymer (CFRP) systems. The strengthening system consists of CFRP wet layup sheets that are installed into holes opened orthogonally to the RC slab, and bonded to the surrounding substract with epoxy adhesive. Two different techniques were adopted: one where the CFRP system fully wraps two consecutive holes, forming a close type stirrup; the second is formed by a type of flexible CFRP bar installed into each hole, working like a dowel. The experimental program is composed of 12 real scale prototypes representative of RC slab-column connection (2500 × 2500 mm plan dimensions and 180 mm thickness). One of the prototypes was not strengthened for constituting the reference specimen, while the others were strengthened by adopting different arrangements for the strengthening systems, namely the pattern of the holes (cross versus radial), number of strengthening perimeters, holes per perimeter and CFRP cross sectional area per perimeter. A maximum increase of punching capacity of 67% was obtained by using the proposed strengthening techniques, having been possible to convert brittle punching failure into a ductile flexure one with the most effective punching strengthening configurationsCNPq, CAPES and FCT (project PTDC/ECM-EST/1882/2014) for funding support provided to the research activities, and BASF for supplying the strengthening systems for the experimental programElsevierUniversidade do MinhoSantos, Galileu S.Melo, Guilherme S. S. A.Barros, Joaquim A. O.2019-092019-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/71745engSantos, G. S., Melo, G. S., & Barros, J. A. (2019). Punching CFRP-based strengthening solutions for reinforced concrete flat slabs. Composite Structures, 2240263-82231879-108510.1016/j.compstruct.2019.111077https://www.sciencedirect.com/science/article/pii/S0263822318330137info: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:RCAAP2023-07-21T12:31:14Zoai:repositorium.sdum.uminho.pt:1822/71745Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:26:28.471868Repositório 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 |
Punching CFRP-based strengthening solutions for reinforced concrete flat slabs |
title |
Punching CFRP-based strengthening solutions for reinforced concrete flat slabs |
spellingShingle |
Punching CFRP-based strengthening solutions for reinforced concrete flat slabs Santos, Galileu S. Punching strengthening CFRP Reinforced concrete slabs Experimental tests Engenharia e Tecnologia::Engenharia Civil Science & Technology |
title_short |
Punching CFRP-based strengthening solutions for reinforced concrete flat slabs |
title_full |
Punching CFRP-based strengthening solutions for reinforced concrete flat slabs |
title_fullStr |
Punching CFRP-based strengthening solutions for reinforced concrete flat slabs |
title_full_unstemmed |
Punching CFRP-based strengthening solutions for reinforced concrete flat slabs |
title_sort |
Punching CFRP-based strengthening solutions for reinforced concrete flat slabs |
author |
Santos, Galileu S. |
author_facet |
Santos, Galileu S. Melo, Guilherme S. S. A. Barros, Joaquim A. O. |
author_role |
author |
author2 |
Melo, Guilherme S. S. A. Barros, Joaquim A. O. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Santos, Galileu S. Melo, Guilherme S. S. A. Barros, Joaquim A. O. |
dc.subject.por.fl_str_mv |
Punching strengthening CFRP Reinforced concrete slabs Experimental tests Engenharia e Tecnologia::Engenharia Civil Science & Technology |
topic |
Punching strengthening CFRP Reinforced concrete slabs Experimental tests Engenharia e Tecnologia::Engenharia Civil Science & Technology |
description |
This paper presents an experimental research program on the punching strengthening of flat reinforced concrete (RC) slabs with carbon fibre reinforced polymer (CFRP) systems. The strengthening system consists of CFRP wet layup sheets that are installed into holes opened orthogonally to the RC slab, and bonded to the surrounding substract with epoxy adhesive. Two different techniques were adopted: one where the CFRP system fully wraps two consecutive holes, forming a close type stirrup; the second is formed by a type of flexible CFRP bar installed into each hole, working like a dowel. The experimental program is composed of 12 real scale prototypes representative of RC slab-column connection (2500 × 2500 mm plan dimensions and 180 mm thickness). One of the prototypes was not strengthened for constituting the reference specimen, while the others were strengthened by adopting different arrangements for the strengthening systems, namely the pattern of the holes (cross versus radial), number of strengthening perimeters, holes per perimeter and CFRP cross sectional area per perimeter. A maximum increase of punching capacity of 67% was obtained by using the proposed strengthening techniques, having been possible to convert brittle punching failure into a ductile flexure one with the most effective punching strengthening configurations |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-09 2019-09-01T00:00:00Z |
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/1822/71745 |
url |
http://hdl.handle.net/1822/71745 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Santos, G. S., Melo, G. S., & Barros, J. A. (2019). Punching CFRP-based strengthening solutions for reinforced concrete flat slabs. Composite Structures, 224 0263-8223 1879-1085 10.1016/j.compstruct.2019.111077 https://www.sciencedirect.com/science/article/pii/S0263822318330137 |
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 |
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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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1799132752363126784 |