Relation between shear stresses and flexural tensile stresses from standardized tests of extracted prismatic specimens of an SFRC Bridge Girder
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: | https://hdl.handle.net/1822/81921 |
Resumo: | Experimental research on the direct shear behavior of fiber-reinforced concrete is often carried out using prisms molded with specific dimensions for a standardized test. However, the flow of fresh concrete in these molds can be different than in the case of a full-scale structural element. This is important considering that the flow direction highly influences the distribution and orientation of fibers. In addition, most of the studies did not relate their shear results to other mechanical properties. In contrast, this study attempted to deepen the experimental knowledge of the crack propagation of a steel fiber-reinforced concrete (SFRC) used in a full-scale prototype of a bridge box girder built in the laboratory. Prismatic specimens were sawn from webs and top flanges of this prototype. Serving as references, additional specimens were molded in wooden boxes. In a previous study of our research group, both had been tested under a three-point notched bending configuration maintaining test conditions proportional to the EN14651 specifications. From each of the previously flexurally tested specimens, two prismatic specimens suitable for the Fédération Internationale de la Précontrainte (FIP) shear test setup were extracted by adopting a cutting methodology that avoided the damage induced by the flexural tests to be part of the FIP specimens. These FIP specimens were tested in almost pure shear loading conditions for assessing the performance of SFRC. Computer tomography images and photos of the shear failure faces were used to determine the distribution and density of fibers. The results demonstrated that the peak loads were proportional to the fiber density at the shear failure section. Assuming that the SFRC conditions of the webs were representative of a common batching procedure in the construction industry, the results from the tests in specimens extracted from these webs were adopted to establish shear stress/flexural tensile stress ratios vs. crack mouth opening displacement curves. The curves belonging to cross-sections of a similar fiber density in the shear and flexural cases allowed for the proposal of a normalized crack-dilatancy relation composed of three stages of the crack propagation. In addition, a trilinear crack width-slip relation was established using the same set of specimens. The relevancy of this proposal is that the shear response can be estimated from a widely accepted standardized flexural test, which demands a simpler instrumentation and is also easier to execute than the shear setup. |
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Relation between shear stresses and flexural tensile stresses from standardized tests of extracted prismatic specimens of an SFRC Bridge GirderShear behaviorSteel fiber-reinforced concreteBox girderFiber distributionEngenharia e Tecnologia::Engenharia CivilScience & TechnologyExperimental research on the direct shear behavior of fiber-reinforced concrete is often carried out using prisms molded with specific dimensions for a standardized test. However, the flow of fresh concrete in these molds can be different than in the case of a full-scale structural element. This is important considering that the flow direction highly influences the distribution and orientation of fibers. In addition, most of the studies did not relate their shear results to other mechanical properties. In contrast, this study attempted to deepen the experimental knowledge of the crack propagation of a steel fiber-reinforced concrete (SFRC) used in a full-scale prototype of a bridge box girder built in the laboratory. Prismatic specimens were sawn from webs and top flanges of this prototype. Serving as references, additional specimens were molded in wooden boxes. In a previous study of our research group, both had been tested under a three-point notched bending configuration maintaining test conditions proportional to the EN14651 specifications. From each of the previously flexurally tested specimens, two prismatic specimens suitable for the Fédération Internationale de la Précontrainte (FIP) shear test setup were extracted by adopting a cutting methodology that avoided the damage induced by the flexural tests to be part of the FIP specimens. These FIP specimens were tested in almost pure shear loading conditions for assessing the performance of SFRC. Computer tomography images and photos of the shear failure faces were used to determine the distribution and density of fibers. The results demonstrated that the peak loads were proportional to the fiber density at the shear failure section. Assuming that the SFRC conditions of the webs were representative of a common batching procedure in the construction industry, the results from the tests in specimens extracted from these webs were adopted to establish shear stress/flexural tensile stress ratios vs. crack mouth opening displacement curves. The curves belonging to cross-sections of a similar fiber density in the shear and flexural cases allowed for the proposal of a normalized crack-dilatancy relation composed of three stages of the crack propagation. In addition, a trilinear crack width-slip relation was established using the same set of specimens. The relevancy of this proposal is that the shear response can be estimated from a widely accepted standardized flexural test, which demands a simpler instrumentation and is also easier to execute than the shear setup.This research was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001. This research has also received funding from CNPq, Brazil and from Fundação Coordenação de Projetos, Pesquisas e Estudos Tecnológicos— COPPETEC, Brazil.MDPIUniversidade do MinhoFlores, Alfredo QuirogaMendes de Andrade, Rodolfo GiacomimPfeil, Michèle SchubertBarros, Joaquim A. O.Battista, Ronaldo CarvalhoOliveira de Araújo, Olga MariaLopes, Ricardo TadeuToledo Filho, Romildo Dias2022-11-222022-11-22T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/81921eng1996-194410.3390/ma15238286https://doi.org/10.3390/ma15238286info: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:RCAAP2023-07-21T12:37:58Zoai:repositorium.sdum.uminho.pt:1822/81921Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:34:19.402062Repositório 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 |
Relation between shear stresses and flexural tensile stresses from standardized tests of extracted prismatic specimens of an SFRC Bridge Girder |
title |
Relation between shear stresses and flexural tensile stresses from standardized tests of extracted prismatic specimens of an SFRC Bridge Girder |
spellingShingle |
Relation between shear stresses and flexural tensile stresses from standardized tests of extracted prismatic specimens of an SFRC Bridge Girder Flores, Alfredo Quiroga Shear behavior Steel fiber-reinforced concrete Box girder Fiber distribution Engenharia e Tecnologia::Engenharia Civil Science & Technology |
title_short |
Relation between shear stresses and flexural tensile stresses from standardized tests of extracted prismatic specimens of an SFRC Bridge Girder |
title_full |
Relation between shear stresses and flexural tensile stresses from standardized tests of extracted prismatic specimens of an SFRC Bridge Girder |
title_fullStr |
Relation between shear stresses and flexural tensile stresses from standardized tests of extracted prismatic specimens of an SFRC Bridge Girder |
title_full_unstemmed |
Relation between shear stresses and flexural tensile stresses from standardized tests of extracted prismatic specimens of an SFRC Bridge Girder |
title_sort |
Relation between shear stresses and flexural tensile stresses from standardized tests of extracted prismatic specimens of an SFRC Bridge Girder |
author |
Flores, Alfredo Quiroga |
author_facet |
Flores, Alfredo Quiroga Mendes de Andrade, Rodolfo Giacomim Pfeil, Michèle Schubert Barros, Joaquim A. O. Battista, Ronaldo Carvalho Oliveira de Araújo, Olga Maria Lopes, Ricardo Tadeu Toledo Filho, Romildo Dias |
author_role |
author |
author2 |
Mendes de Andrade, Rodolfo Giacomim Pfeil, Michèle Schubert Barros, Joaquim A. O. Battista, Ronaldo Carvalho Oliveira de Araújo, Olga Maria Lopes, Ricardo Tadeu Toledo Filho, Romildo Dias |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Flores, Alfredo Quiroga Mendes de Andrade, Rodolfo Giacomim Pfeil, Michèle Schubert Barros, Joaquim A. O. Battista, Ronaldo Carvalho Oliveira de Araújo, Olga Maria Lopes, Ricardo Tadeu Toledo Filho, Romildo Dias |
dc.subject.por.fl_str_mv |
Shear behavior Steel fiber-reinforced concrete Box girder Fiber distribution Engenharia e Tecnologia::Engenharia Civil Science & Technology |
topic |
Shear behavior Steel fiber-reinforced concrete Box girder Fiber distribution Engenharia e Tecnologia::Engenharia Civil Science & Technology |
description |
Experimental research on the direct shear behavior of fiber-reinforced concrete is often carried out using prisms molded with specific dimensions for a standardized test. However, the flow of fresh concrete in these molds can be different than in the case of a full-scale structural element. This is important considering that the flow direction highly influences the distribution and orientation of fibers. In addition, most of the studies did not relate their shear results to other mechanical properties. In contrast, this study attempted to deepen the experimental knowledge of the crack propagation of a steel fiber-reinforced concrete (SFRC) used in a full-scale prototype of a bridge box girder built in the laboratory. Prismatic specimens were sawn from webs and top flanges of this prototype. Serving as references, additional specimens were molded in wooden boxes. In a previous study of our research group, both had been tested under a three-point notched bending configuration maintaining test conditions proportional to the EN14651 specifications. From each of the previously flexurally tested specimens, two prismatic specimens suitable for the Fédération Internationale de la Précontrainte (FIP) shear test setup were extracted by adopting a cutting methodology that avoided the damage induced by the flexural tests to be part of the FIP specimens. These FIP specimens were tested in almost pure shear loading conditions for assessing the performance of SFRC. Computer tomography images and photos of the shear failure faces were used to determine the distribution and density of fibers. The results demonstrated that the peak loads were proportional to the fiber density at the shear failure section. Assuming that the SFRC conditions of the webs were representative of a common batching procedure in the construction industry, the results from the tests in specimens extracted from these webs were adopted to establish shear stress/flexural tensile stress ratios vs. crack mouth opening displacement curves. The curves belonging to cross-sections of a similar fiber density in the shear and flexural cases allowed for the proposal of a normalized crack-dilatancy relation composed of three stages of the crack propagation. In addition, a trilinear crack width-slip relation was established using the same set of specimens. The relevancy of this proposal is that the shear response can be estimated from a widely accepted standardized flexural test, which demands a simpler instrumentation and is also easier to execute than the shear setup. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-11-22 2022-11-22T00:00:00Z |
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 |
https://hdl.handle.net/1822/81921 |
url |
https://hdl.handle.net/1822/81921 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1996-1944 10.3390/ma15238286 https://doi.org/10.3390/ma15238286 |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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MDPI |
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MDPI |
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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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