Shear strengthening of reinforced concrete beams strengthened using embedded through section steel bars
Autor(a) principal: | |
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Data de Publicação: | 2014 |
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/1822/32163 |
Resumo: | A new shear strengthening technique, designated as embedded through section (ETS), has been developed to retrofit existing reinforced concrete (RC) elements. This technique calls for holes to be drilled through the beam section; then bars of steel or FRP materials are introduced into these holes and bonded with adhesives to the surrounding concrete. When concrete cover has not the bond and strength requisites to guarantee a strengthening effectiveness for the Externally Bonded and Near Surface Mounted techniques, ETS strategy can be a competitive alternative since it mobilizes the beam’s concrete core which is, generally, free of damage. To explore the potentialities of the ETS technique for the shear strengthening of RC beams, an experimental program was carried out, composed of RC T-cross section beams shear strengthened by using steel bars. The influence on the shear strengthening efficiency of the inclination and shear strengthening ratio of ETS configurations was evaluated; the study also examined the interaction of ETS bars and existing steel stirrups. An increase of shear capacity up to 109% and 136% in the beams with and without internal stirrups, respectively, was obtained. Inclined ETS bars provided higher increase of shear resistance than vertical ones. |
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Shear strengthening of reinforced concrete beams strengthened using embedded through section steel barsShear strengtheningReinforced concrete beamsETS steel barsETS techniqueEngenharia e Tecnologia::Engenharia CivilScience & TechnologyA new shear strengthening technique, designated as embedded through section (ETS), has been developed to retrofit existing reinforced concrete (RC) elements. This technique calls for holes to be drilled through the beam section; then bars of steel or FRP materials are introduced into these holes and bonded with adhesives to the surrounding concrete. When concrete cover has not the bond and strength requisites to guarantee a strengthening effectiveness for the Externally Bonded and Near Surface Mounted techniques, ETS strategy can be a competitive alternative since it mobilizes the beam’s concrete core which is, generally, free of damage. To explore the potentialities of the ETS technique for the shear strengthening of RC beams, an experimental program was carried out, composed of RC T-cross section beams shear strengthened by using steel bars. The influence on the shear strengthening efficiency of the inclination and shear strengthening ratio of ETS configurations was evaluated; the study also examined the interaction of ETS bars and existing steel stirrups. An increase of shear capacity up to 109% and 136% in the beams with and without internal stirrups, respectively, was obtained. Inclined ETS bars provided higher increase of shear resistance than vertical ones.The authors wish to acknowledge Elletipi S.r.l. (Ferrara, Italy) for supporting the experimental program, Interbau S.r.l. (Milano, Italy) for applying the ETS strengthening system and the ENDIF Geomatic Group (University of Ferrara, Italy) for monitoring the experimental program. The authors also wish to acknowledge the Engineering Department of the University of Ferrara for its financial support.ElsevierUniversidade do MinhoBreveglieri, MatteoAprile, AlessandraBarros, Joaquim A. O.2014-122014-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/32163eng0141-029610.1016/j.engstruct.2014.09.026http://www.sciencedirect.com/science/article/pii/S014102961400563Xinfo: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:RCAAP2023-07-21T12:20:24Zoai:repositorium.sdum.uminho.pt:1822/32163Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:13:31.177669Repositório 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 |
Shear strengthening of reinforced concrete beams strengthened using embedded through section steel bars |
title |
Shear strengthening of reinforced concrete beams strengthened using embedded through section steel bars |
spellingShingle |
Shear strengthening of reinforced concrete beams strengthened using embedded through section steel bars Breveglieri, Matteo Shear strengthening Reinforced concrete beams ETS steel bars ETS technique Engenharia e Tecnologia::Engenharia Civil Science & Technology |
title_short |
Shear strengthening of reinforced concrete beams strengthened using embedded through section steel bars |
title_full |
Shear strengthening of reinforced concrete beams strengthened using embedded through section steel bars |
title_fullStr |
Shear strengthening of reinforced concrete beams strengthened using embedded through section steel bars |
title_full_unstemmed |
Shear strengthening of reinforced concrete beams strengthened using embedded through section steel bars |
title_sort |
Shear strengthening of reinforced concrete beams strengthened using embedded through section steel bars |
author |
Breveglieri, Matteo |
author_facet |
Breveglieri, Matteo Aprile, Alessandra Barros, Joaquim A. O. |
author_role |
author |
author2 |
Aprile, Alessandra Barros, Joaquim A. O. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Breveglieri, Matteo Aprile, Alessandra Barros, Joaquim A. O. |
dc.subject.por.fl_str_mv |
Shear strengthening Reinforced concrete beams ETS steel bars ETS technique Engenharia e Tecnologia::Engenharia Civil Science & Technology |
topic |
Shear strengthening Reinforced concrete beams ETS steel bars ETS technique Engenharia e Tecnologia::Engenharia Civil Science & Technology |
description |
A new shear strengthening technique, designated as embedded through section (ETS), has been developed to retrofit existing reinforced concrete (RC) elements. This technique calls for holes to be drilled through the beam section; then bars of steel or FRP materials are introduced into these holes and bonded with adhesives to the surrounding concrete. When concrete cover has not the bond and strength requisites to guarantee a strengthening effectiveness for the Externally Bonded and Near Surface Mounted techniques, ETS strategy can be a competitive alternative since it mobilizes the beam’s concrete core which is, generally, free of damage. To explore the potentialities of the ETS technique for the shear strengthening of RC beams, an experimental program was carried out, composed of RC T-cross section beams shear strengthened by using steel bars. The influence on the shear strengthening efficiency of the inclination and shear strengthening ratio of ETS configurations was evaluated; the study also examined the interaction of ETS bars and existing steel stirrups. An increase of shear capacity up to 109% and 136% in the beams with and without internal stirrups, respectively, was obtained. Inclined ETS bars provided higher increase of shear resistance than vertical ones. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-12 2014-12-01T00:00:00Z |
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/1822/32163 |
url |
http://hdl.handle.net/1822/32163 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0141-0296 10.1016/j.engstruct.2014.09.026 http://www.sciencedirect.com/science/article/pii/S014102961400563X |
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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1799132574511005696 |