Numerical Simulation of PFRC Fracture Subjected to High Temperature by Means of a Trilinear Softening Diagram

Fibre-reinforced concrete (FRC) has been used for decades in certain applications in the construction industry, such as tunnel linings and precast elements, but has experienced important progress in recent times, boosted by the inclusion of guidelines for its use in some national and international s...

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Autores: Suárez-Guerra, Fernando, Enfedaque, Alejandro, García-Alberti, Marcos, Gálvez-Ruíz, Jaime Carlos
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2023
País:España
Institución:Universidad de Jaén
Repositorio:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
OAI Identifier:oai:ruja.ujaen.es:10953/4772
Acceso en línea:https://doi.org/10.3390/ma16176048
https://www.mdpi.com/1996-1944/16/17/6048
https://hdl.handle.net/10953/4772
Access Level:acceso abierto
Palabra clave:High temperature
Polyolefin fibre reinforced concrete
Trilinear softening function
Cohesive model
691.32
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spelling Numerical Simulation of PFRC Fracture Subjected to High Temperature by Means of a Trilinear Softening DiagramSuárez-Guerra, FernandoEnfedaque, AlejandroGarcía-Alberti, MarcosGálvez-Ruíz, Jaime CarlosHigh temperaturePolyolefin fibre reinforced concreteTrilinear softening functionCohesive model691.32Fibre-reinforced concrete (FRC) has been used for decades in certain applications in the construction industry, such as tunnel linings and precast elements, but has experienced important progress in recent times, boosted by the inclusion of guidelines for its use in some national and international standards. Traditional steel fibres have been studied in depth and their performance is well-known, although in recent years new materials have been proposed as possible alternatives. Polyolefin macro-fibres, for instance, have been proven to enhance the mechanical properties of concrete and the parameters that define their behaviour (fibre length, fibre proportion or casting method, for instance) have been identified. These fibres overcome certain traditional problems related to steel fibres, such as corrosion or their interaction with magnetic fields, which can limit the use of steel in some applications. The behaviour of polyolefin fibre-reinforced concrete (PFRC) has been numerically reproduced with success through an embedded cohesive crack formulation that uses a trilinear softening diagram to describe the fracture behaviour of the material. Furthermore, concrete behaves well under high temperatures or fire events, especially when it is compared with other construction materials, but the behaviour of PFRC must be analysed if the use of these fibres is to be extended. To this end, the degradation of PFRC fracture properties has been recently experimentally analysed under a temperature range between 20 ◦ C and 200 ◦ C. As temperature increases, polyolefin fibres modify their mechanical properties and their shape, which reduce their performance as reinforcements of concrete. In this work, those experimental results, which include results of low (3 kg/m3 ) and high (10 kg/m3 ) proportion PFRC specimens, are used as reference to study the fracture behaviour of PFRC exposed to high temperatures from a numerical point of view. The experimental load-deflection diagrams are reproduced by modifying the trilinear diagram used in the cohesive model, which helps to understand how the trilinear diagram parameters are affected by high temperature exposure. Finally, some expressions are proposed to adapt the initial trilinear diagram (obtained with specimens not exposed to high temperature) in order to numerically reproduce the fracture behaviour of PFRC affected by high temperature exposure.This research was funded by the Ministry of Science and Innovation of Spain through the Research Fund Project PID2019-108978RB-C31MDPI202520252023info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://doi.org/10.3390/ma16176048https://www.mdpi.com/1996-1944/16/17/6048https://hdl.handle.net/10953/4772reponame:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaéninstname:Universidad de JaénInglésMaterialsAttribution 3.0 Spainhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:ruja.ujaen.es:10953/47722026-06-24T12:41:07Z
dc.title.none.fl_str_mv Numerical Simulation of PFRC Fracture Subjected to High Temperature by Means of a Trilinear Softening Diagram
title Numerical Simulation of PFRC Fracture Subjected to High Temperature by Means of a Trilinear Softening Diagram
spellingShingle Numerical Simulation of PFRC Fracture Subjected to High Temperature by Means of a Trilinear Softening Diagram
Suárez-Guerra, Fernando
High temperature
Polyolefin fibre reinforced concrete
Trilinear softening function
Cohesive model
691.32
title_short Numerical Simulation of PFRC Fracture Subjected to High Temperature by Means of a Trilinear Softening Diagram
title_full Numerical Simulation of PFRC Fracture Subjected to High Temperature by Means of a Trilinear Softening Diagram
title_fullStr Numerical Simulation of PFRC Fracture Subjected to High Temperature by Means of a Trilinear Softening Diagram
title_full_unstemmed Numerical Simulation of PFRC Fracture Subjected to High Temperature by Means of a Trilinear Softening Diagram
title_sort Numerical Simulation of PFRC Fracture Subjected to High Temperature by Means of a Trilinear Softening Diagram
dc.creator.none.fl_str_mv Suárez-Guerra, Fernando
Enfedaque, Alejandro
García-Alberti, Marcos
Gálvez-Ruíz, Jaime Carlos
author Suárez-Guerra, Fernando
author_facet Suárez-Guerra, Fernando
Enfedaque, Alejandro
García-Alberti, Marcos
Gálvez-Ruíz, Jaime Carlos
author_role author
author2 Enfedaque, Alejandro
García-Alberti, Marcos
Gálvez-Ruíz, Jaime Carlos
author2_role author
author
author
dc.subject.none.fl_str_mv High temperature
Polyolefin fibre reinforced concrete
Trilinear softening function
Cohesive model
691.32
topic High temperature
Polyolefin fibre reinforced concrete
Trilinear softening function
Cohesive model
691.32
description Fibre-reinforced concrete (FRC) has been used for decades in certain applications in the construction industry, such as tunnel linings and precast elements, but has experienced important progress in recent times, boosted by the inclusion of guidelines for its use in some national and international standards. Traditional steel fibres have been studied in depth and their performance is well-known, although in recent years new materials have been proposed as possible alternatives. Polyolefin macro-fibres, for instance, have been proven to enhance the mechanical properties of concrete and the parameters that define their behaviour (fibre length, fibre proportion or casting method, for instance) have been identified. These fibres overcome certain traditional problems related to steel fibres, such as corrosion or their interaction with magnetic fields, which can limit the use of steel in some applications. The behaviour of polyolefin fibre-reinforced concrete (PFRC) has been numerically reproduced with success through an embedded cohesive crack formulation that uses a trilinear softening diagram to describe the fracture behaviour of the material. Furthermore, concrete behaves well under high temperatures or fire events, especially when it is compared with other construction materials, but the behaviour of PFRC must be analysed if the use of these fibres is to be extended. To this end, the degradation of PFRC fracture properties has been recently experimentally analysed under a temperature range between 20 ◦ C and 200 ◦ C. As temperature increases, polyolefin fibres modify their mechanical properties and their shape, which reduce their performance as reinforcements of concrete. In this work, those experimental results, which include results of low (3 kg/m3 ) and high (10 kg/m3 ) proportion PFRC specimens, are used as reference to study the fracture behaviour of PFRC exposed to high temperatures from a numerical point of view. The experimental load-deflection diagrams are reproduced by modifying the trilinear diagram used in the cohesive model, which helps to understand how the trilinear diagram parameters are affected by high temperature exposure. Finally, some expressions are proposed to adapt the initial trilinear diagram (obtained with specimens not exposed to high temperature) in order to numerically reproduce the fracture behaviour of PFRC affected by high temperature exposure.
publishDate 2023
dc.date.none.fl_str_mv 2023
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.3390/ma16176048
https://www.mdpi.com/1996-1944/16/17/6048
https://hdl.handle.net/10953/4772
url https://doi.org/10.3390/ma16176048
https://www.mdpi.com/1996-1944/16/17/6048
https://hdl.handle.net/10953/4772
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Materials
dc.rights.none.fl_str_mv Attribution 3.0 Spain
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 3.0 Spain
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
instname:Universidad de Jaén
instname_str Universidad de Jaén
reponame_str RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
collection RUJA. Repositorio Institucional de la Producción Científica de la Universidad de Jaén
repository.name.fl_str_mv
repository.mail.fl_str_mv
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