Post-cracking behaviour of steel fibre reinforced concrete
Autor(a) principal: | |
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Data de Publicação: | 2005 |
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/1822/4945 |
Resumo: | Recently, RILEM TC 162-TDF has proposed equivalent, feq, and residual, fR, flexural tensile strength parameters to characterize and simulate the post-cracking behaviour of steel fibre reinforced concrete (SFRC) structures. In the current work, more than two hundred flexural tests are carried out according to the RILEM TC 162-TDF recommendations and the corresponding values of feq and fR parameters are evaluated. In series of specimens reinforced with fibres of a distinct length/diameter ratio, similar values of feq and fR parameters were obtained in these series. Although a strong correlation between feq and fR was determined, a larger scatter of fR values was observed thereby revealing feq to be more appropriate for design purposes. A numerical strategy involving a cross sectional layered model and an inverse analysis was developed to evaluate the post-cracking stress-strain and the stress-crack opening diagrams for the tested SFRC. This strategy was also used to determine a relation between the post-cracking strain, Epcr, and the crack opening displacement, w, (Epcr= w/Lp) which is useful for evaluating the crack opening when numerical strategies based on a stress-strain approach are used. The obtained Lp values range from half the specimen cross section height to half the distance between the tip of the notch and the top of the cross section. |
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Post-cracking behaviour of steel fibre reinforced concreteScience & TechnologyRecently, RILEM TC 162-TDF has proposed equivalent, feq, and residual, fR, flexural tensile strength parameters to characterize and simulate the post-cracking behaviour of steel fibre reinforced concrete (SFRC) structures. In the current work, more than two hundred flexural tests are carried out according to the RILEM TC 162-TDF recommendations and the corresponding values of feq and fR parameters are evaluated. In series of specimens reinforced with fibres of a distinct length/diameter ratio, similar values of feq and fR parameters were obtained in these series. Although a strong correlation between feq and fR was determined, a larger scatter of fR values was observed thereby revealing feq to be more appropriate for design purposes. A numerical strategy involving a cross sectional layered model and an inverse analysis was developed to evaluate the post-cracking stress-strain and the stress-crack opening diagrams for the tested SFRC. This strategy was also used to determine a relation between the post-cracking strain, Epcr, and the crack opening displacement, w, (Epcr= w/Lp) which is useful for evaluating the crack opening when numerical strategies based on a stress-strain approach are used. The obtained Lp values range from half the specimen cross section height to half the distance between the tip of the notch and the top of the cross section.Récemment, pour caractériser et simuler le comportement post-fissuration en traction du béton renforcé des fibres d’acier, la Commission Technique 162-TDF de la RILEM a proposé des paramètres désignés par résistance équivalente, feq, et résistance résiduelle, fR, à la contrainte en flexion. Dans le travail présent, des valeurs de ces paramètres sont obtenues sur plus de deux cents essais de flexion effectués en accord avec les recommandations du TC 162-TDF de la RILEM. Des valeurs semblables de feq et fR ont été obtenues dans des séries d’éprouvettes renforcées avec des fibres d’un rapport longueur/diamètre distinct. Bien qu’une forte corrélation entre feq et fR ait été déterminée, une plus grande dispersion de valeurs du fR a été observée, en démontrant que feq est plus approprié pour les buts du projet. Pour évaluer les diagrammes contrainte-déformation et contrainteouverture après fissuration, une stratégie numérique a été développée, en utilisant un modèle de section et en effectuant une analyse inverse. Cette stratégie a aussi été utilisée pour déterminer une relation entre la contrainte après fissuration, Epcr, et l’ouverture de fissure, w, (Epcr= w/Lp) utile pour évaluer l’ouverture de la fissure quand les stratégies numériques sont basées sur une approche contrainte-déformation. Les valeurs de Lp obtenues ont varié entre la demi-hauteur de la section de l’éprouvette et la demi-distance entre l’extrémité de l’entaille et le sommet de la section.RILEMUniversidade do MinhoBarros, Joaquim A. O.Cunha, Vitor M. C. F.Ribeiro, Alberto F.Antunes, J. A. B.20052005-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/4945eng"Materials and Structures". ISSN 1359-5997. 38:275 (Jan./Feb. 2005) 47-56.1359-599710.1617/14058info: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:RCAAP2023-07-21T12:17:37Zoai:repositorium.sdum.uminho.pt:1822/4945Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:10:17.182652Repositório 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 |
Post-cracking behaviour of steel fibre reinforced concrete |
title |
Post-cracking behaviour of steel fibre reinforced concrete |
spellingShingle |
Post-cracking behaviour of steel fibre reinforced concrete Barros, Joaquim A. O. Science & Technology |
title_short |
Post-cracking behaviour of steel fibre reinforced concrete |
title_full |
Post-cracking behaviour of steel fibre reinforced concrete |
title_fullStr |
Post-cracking behaviour of steel fibre reinforced concrete |
title_full_unstemmed |
Post-cracking behaviour of steel fibre reinforced concrete |
title_sort |
Post-cracking behaviour of steel fibre reinforced concrete |
author |
Barros, Joaquim A. O. |
author_facet |
Barros, Joaquim A. O. Cunha, Vitor M. C. F. Ribeiro, Alberto F. Antunes, J. A. B. |
author_role |
author |
author2 |
Cunha, Vitor M. C. F. Ribeiro, Alberto F. Antunes, J. A. B. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Barros, Joaquim A. O. Cunha, Vitor M. C. F. Ribeiro, Alberto F. Antunes, J. A. B. |
dc.subject.por.fl_str_mv |
Science & Technology |
topic |
Science & Technology |
description |
Recently, RILEM TC 162-TDF has proposed equivalent, feq, and residual, fR, flexural tensile strength parameters to characterize and simulate the post-cracking behaviour of steel fibre reinforced concrete (SFRC) structures. In the current work, more than two hundred flexural tests are carried out according to the RILEM TC 162-TDF recommendations and the corresponding values of feq and fR parameters are evaluated. In series of specimens reinforced with fibres of a distinct length/diameter ratio, similar values of feq and fR parameters were obtained in these series. Although a strong correlation between feq and fR was determined, a larger scatter of fR values was observed thereby revealing feq to be more appropriate for design purposes. A numerical strategy involving a cross sectional layered model and an inverse analysis was developed to evaluate the post-cracking stress-strain and the stress-crack opening diagrams for the tested SFRC. This strategy was also used to determine a relation between the post-cracking strain, Epcr, and the crack opening displacement, w, (Epcr= w/Lp) which is useful for evaluating the crack opening when numerical strategies based on a stress-strain approach are used. The obtained Lp values range from half the specimen cross section height to half the distance between the tip of the notch and the top of the cross section. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005 2005-01-01T00:00:00Z |
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/1822/4945 |
url |
http://hdl.handle.net/1822/4945 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Materials and Structures". ISSN 1359-5997. 38:275 (Jan./Feb. 2005) 47-56. 1359-5997 10.1617/14058 |
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 |
RILEM |
publisher.none.fl_str_mv |
RILEM |
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 |
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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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1799132530957352960 |