Mesh-independent framework for the bidimensional analysis of CFRP–concrete debonding shear tests with discrete fracture
Autor(a) principal: | |
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Data de Publicação: | 2022 |
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/10400.1/19439 |
Resumo: | The performance of concrete structures strengthened with carbon fiber-reinforced polymer (CFRP) systems can depend heavily on the bond strength of the interface between the concrete and the reinforced polymer. Even though experimental testing can be used to derive suitable constitutive models, their interpretation and analysis is often limited by the reliability of available numerical/analytical models. The debonding in shear tests can be controlled by the highly nonlinear interaction of the bonded interface with the microcracks developing in the substrate. This process cannot be efficiently predicted by simplifying assumptions, which is why robust models accounting for those features, while relying only on material parameters that can be easily measured and interpreted, need to be developed. This paper introduces a framework for developing such models based on the discrete representation of fracture that can be easily deployed into existing finite-element codes. The substrate bond failure, in addition to the interface bond failure and any combination thereof, are automatically accounted for, and the cracks are not prespecified to the underlying finite-element mesh, which means that the results are mesh-insensitive and discretization-independent. A validation of the proposed framework was performed using modified double-shear bond tests between CFRP and concrete. An in-depth analysis was carried out to assess the influence of bond length and CFRP reinforcement area on the debonding behavior and ductility of the connection. (C) 2022 American Society of Civil Engineers. |
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Mesh-independent framework for the bidimensional analysis of CFRP–concrete debonding shear tests with discrete fractureBond behaviorRC BeamsFRPModelPredictionStrengthElementsFailureThe performance of concrete structures strengthened with carbon fiber-reinforced polymer (CFRP) systems can depend heavily on the bond strength of the interface between the concrete and the reinforced polymer. Even though experimental testing can be used to derive suitable constitutive models, their interpretation and analysis is often limited by the reliability of available numerical/analytical models. The debonding in shear tests can be controlled by the highly nonlinear interaction of the bonded interface with the microcracks developing in the substrate. This process cannot be efficiently predicted by simplifying assumptions, which is why robust models accounting for those features, while relying only on material parameters that can be easily measured and interpreted, need to be developed. This paper introduces a framework for developing such models based on the discrete representation of fracture that can be easily deployed into existing finite-element codes. The substrate bond failure, in addition to the interface bond failure and any combination thereof, are automatically accounted for, and the cracks are not prespecified to the underlying finite-element mesh, which means that the results are mesh-insensitive and discretization-independent. A validation of the proposed framework was performed using modified double-shear bond tests between CFRP and concrete. An in-depth analysis was carried out to assess the influence of bond length and CFRP reinforcement area on the debonding behavior and ductility of the connection. (C) 2022 American Society of Civil Engineers.American Society of Civil EngineersSapientiaGraça-e-Costa, RuiMukhtar, Faisal M.Dias-da-Costa, Daniel2023-04-12T09:22:59Z2022-062022-06-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/19439eng10.1061/(ASCE)CC.1943-5614.00012161943-5614info: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:RCAAP2023-07-24T10:31:54Zoai:sapientia.ualg.pt:10400.1/19439Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:09:04.475437Repositório 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 |
Mesh-independent framework for the bidimensional analysis of CFRP–concrete debonding shear tests with discrete fracture |
title |
Mesh-independent framework for the bidimensional analysis of CFRP–concrete debonding shear tests with discrete fracture |
spellingShingle |
Mesh-independent framework for the bidimensional analysis of CFRP–concrete debonding shear tests with discrete fracture Graça-e-Costa, Rui Bond behavior RC Beams FRP Model Prediction Strength Elements Failure |
title_short |
Mesh-independent framework for the bidimensional analysis of CFRP–concrete debonding shear tests with discrete fracture |
title_full |
Mesh-independent framework for the bidimensional analysis of CFRP–concrete debonding shear tests with discrete fracture |
title_fullStr |
Mesh-independent framework for the bidimensional analysis of CFRP–concrete debonding shear tests with discrete fracture |
title_full_unstemmed |
Mesh-independent framework for the bidimensional analysis of CFRP–concrete debonding shear tests with discrete fracture |
title_sort |
Mesh-independent framework for the bidimensional analysis of CFRP–concrete debonding shear tests with discrete fracture |
author |
Graça-e-Costa, Rui |
author_facet |
Graça-e-Costa, Rui Mukhtar, Faisal M. Dias-da-Costa, Daniel |
author_role |
author |
author2 |
Mukhtar, Faisal M. Dias-da-Costa, Daniel |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Graça-e-Costa, Rui Mukhtar, Faisal M. Dias-da-Costa, Daniel |
dc.subject.por.fl_str_mv |
Bond behavior RC Beams FRP Model Prediction Strength Elements Failure |
topic |
Bond behavior RC Beams FRP Model Prediction Strength Elements Failure |
description |
The performance of concrete structures strengthened with carbon fiber-reinforced polymer (CFRP) systems can depend heavily on the bond strength of the interface between the concrete and the reinforced polymer. Even though experimental testing can be used to derive suitable constitutive models, their interpretation and analysis is often limited by the reliability of available numerical/analytical models. The debonding in shear tests can be controlled by the highly nonlinear interaction of the bonded interface with the microcracks developing in the substrate. This process cannot be efficiently predicted by simplifying assumptions, which is why robust models accounting for those features, while relying only on material parameters that can be easily measured and interpreted, need to be developed. This paper introduces a framework for developing such models based on the discrete representation of fracture that can be easily deployed into existing finite-element codes. The substrate bond failure, in addition to the interface bond failure and any combination thereof, are automatically accounted for, and the cracks are not prespecified to the underlying finite-element mesh, which means that the results are mesh-insensitive and discretization-independent. A validation of the proposed framework was performed using modified double-shear bond tests between CFRP and concrete. An in-depth analysis was carried out to assess the influence of bond length and CFRP reinforcement area on the debonding behavior and ductility of the connection. (C) 2022 American Society of Civil Engineers. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-06 2022-06-01T00:00:00Z 2023-04-12T09:22:59Z |
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/10400.1/19439 |
url |
http://hdl.handle.net/10400.1/19439 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1061/(ASCE)CC.1943-5614.0001216 1943-5614 |
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 Society of Civil Engineers |
publisher.none.fl_str_mv |
American Society of Civil Engineers |
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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1799133337346899968 |