New approach to predict shear capacity of reinforced concrete beams strengthened with NSM technique
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/1822/45428 |
Resumo: | Understanding the shear behavior of a concrete beam is still a challenging task due to several complex mechanisms involved. The Modified Compression Field Theory (MCFT) demonstrated an ability to predict, with good accuracy, the shear capacity of reinforced concrete (RC) members. Due to its iterative nature, the MCFT is not a straightforward design methodology, and a simplified MCFT (SMCFT) approach of this method was proposed to overcome this aspect. This model takes into account the tensile stress installed in the cracked concrete and inclination of the diagonal compressive strut, and requires a smaller number of model parameters than MCFT. This paper presents a new approach to predict the shear capacity of RC beams shear strengthened with fiber-reinforced polymer (FRP) laminates/rods applied according to the near-surface-mounted (NSM) technique. The new approach is based on the SMCFT and considers the relevant features of the interaction between NSM FRP systems and surrounding concrete, such as debonding of FRP laminate/rod and fracture of surrounding concrete of FRP. The experimental results of 100 beams strengthened with different configurations and shear strengthening ratio of FRP reinforcements are used to appraise the predictive performance of the developed approach. By evaluating the ratio between the experimental results to the analytical predictions (Vexp./Vana.), an average value of 1.09 is obtained for the developed approach with a coefficient of variation of 11%. |
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New approach to predict shear capacity of reinforced concrete beams strengthened with NSM techniqueSimplified Modified Compression Field TheoryReinforced concrete beamsShear failureShear strengtheningNear Surface Mounted techniquebeamsreinforced concreteCarbon fiber reinforced polymersEngenharia e Tecnologia::Engenharia CivilScience & TechnologyUnderstanding the shear behavior of a concrete beam is still a challenging task due to several complex mechanisms involved. The Modified Compression Field Theory (MCFT) demonstrated an ability to predict, with good accuracy, the shear capacity of reinforced concrete (RC) members. Due to its iterative nature, the MCFT is not a straightforward design methodology, and a simplified MCFT (SMCFT) approach of this method was proposed to overcome this aspect. This model takes into account the tensile stress installed in the cracked concrete and inclination of the diagonal compressive strut, and requires a smaller number of model parameters than MCFT. This paper presents a new approach to predict the shear capacity of RC beams shear strengthened with fiber-reinforced polymer (FRP) laminates/rods applied according to the near-surface-mounted (NSM) technique. The new approach is based on the SMCFT and considers the relevant features of the interaction between NSM FRP systems and surrounding concrete, such as debonding of FRP laminate/rod and fracture of surrounding concrete of FRP. The experimental results of 100 beams strengthened with different configurations and shear strengthening ratio of FRP reinforcements are used to appraise the predictive performance of the developed approach. By evaluating the ratio between the experimental results to the analytical predictions (Vexp./Vana.), an average value of 1.09 is obtained for the developed approach with a coefficient of variation of 11%.The study presented in this paper is a part of the research project 38780, QREN, titled “CutInov – Innovative carbon fibre reinforced polymer laminates with capacity for a simultaneous flexural and shear/punching strengthening of reinforced concrete elements”, co-financed by the European Regional Development Fund (FEDER) through the Operational Program COMPETE. The first author acknowledges the research grant provided by this project.info:eu-repo/semantics/publishedVersionAmerican Concrete InstituteUniversidade do MinhoBaghi, HadiBarros, Joaquim A. O.2017-012017-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/45428eng0889-324110.14359/51689433https://www.concrete.org/publications/info: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:RCAAP2023-07-21T12:25:06Zoai:repositorium.sdum.uminho.pt:1822/45428Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:19:17.057368Repositório 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 |
New approach to predict shear capacity of reinforced concrete beams strengthened with NSM technique |
title |
New approach to predict shear capacity of reinforced concrete beams strengthened with NSM technique |
spellingShingle |
New approach to predict shear capacity of reinforced concrete beams strengthened with NSM technique Baghi, Hadi Simplified Modified Compression Field Theory Reinforced concrete beams Shear failure Shear strengthening Near Surface Mounted technique beams reinforced concrete Carbon fiber reinforced polymers Engenharia e Tecnologia::Engenharia Civil Science & Technology |
title_short |
New approach to predict shear capacity of reinforced concrete beams strengthened with NSM technique |
title_full |
New approach to predict shear capacity of reinforced concrete beams strengthened with NSM technique |
title_fullStr |
New approach to predict shear capacity of reinforced concrete beams strengthened with NSM technique |
title_full_unstemmed |
New approach to predict shear capacity of reinforced concrete beams strengthened with NSM technique |
title_sort |
New approach to predict shear capacity of reinforced concrete beams strengthened with NSM technique |
author |
Baghi, Hadi |
author_facet |
Baghi, Hadi Barros, Joaquim A. O. |
author_role |
author |
author2 |
Barros, Joaquim A. O. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Baghi, Hadi Barros, Joaquim A. O. |
dc.subject.por.fl_str_mv |
Simplified Modified Compression Field Theory Reinforced concrete beams Shear failure Shear strengthening Near Surface Mounted technique beams reinforced concrete Carbon fiber reinforced polymers Engenharia e Tecnologia::Engenharia Civil Science & Technology |
topic |
Simplified Modified Compression Field Theory Reinforced concrete beams Shear failure Shear strengthening Near Surface Mounted technique beams reinforced concrete Carbon fiber reinforced polymers Engenharia e Tecnologia::Engenharia Civil Science & Technology |
description |
Understanding the shear behavior of a concrete beam is still a challenging task due to several complex mechanisms involved. The Modified Compression Field Theory (MCFT) demonstrated an ability to predict, with good accuracy, the shear capacity of reinforced concrete (RC) members. Due to its iterative nature, the MCFT is not a straightforward design methodology, and a simplified MCFT (SMCFT) approach of this method was proposed to overcome this aspect. This model takes into account the tensile stress installed in the cracked concrete and inclination of the diagonal compressive strut, and requires a smaller number of model parameters than MCFT. This paper presents a new approach to predict the shear capacity of RC beams shear strengthened with fiber-reinforced polymer (FRP) laminates/rods applied according to the near-surface-mounted (NSM) technique. The new approach is based on the SMCFT and considers the relevant features of the interaction between NSM FRP systems and surrounding concrete, such as debonding of FRP laminate/rod and fracture of surrounding concrete of FRP. The experimental results of 100 beams strengthened with different configurations and shear strengthening ratio of FRP reinforcements are used to appraise the predictive performance of the developed approach. By evaluating the ratio between the experimental results to the analytical predictions (Vexp./Vana.), an average value of 1.09 is obtained for the developed approach with a coefficient of variation of 11%. |
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/1822/45428 |
url |
http://hdl.handle.net/1822/45428 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0889-3241 10.14359/51689433 https://www.concrete.org/publications/ |
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 |
American Concrete Institute |
publisher.none.fl_str_mv |
American Concrete Institute |
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 |
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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1799132651184979968 |