A Simplified Inverse Analysis Procedure for the Stress-Crack Opening Relationship of Fiber-Reinforced Concrete

The direct tensile test (DTT) is the most recommended test to determine the tensile behavior of fiber-reinforced concrete (FRC). However, this test is challenging to perform. Several studies have investigated inverse analysis to determine this behavior through simplified tests, such as the bending t...

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Main Authors: Pedro Paulo Martins de Carvalho, Rodrigo de Melo Lameiras
Format: Article
Language:English
Published: MDPI AG 2023-04-01
Series:Buildings
Subjects:
Online Access:https://www.mdpi.com/2075-5309/13/5/1166
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author Pedro Paulo Martins de Carvalho
Rodrigo de Melo Lameiras
author_facet Pedro Paulo Martins de Carvalho
Rodrigo de Melo Lameiras
author_sort Pedro Paulo Martins de Carvalho
collection DOAJ
description The direct tensile test (DTT) is the most recommended test to determine the tensile behavior of fiber-reinforced concrete (FRC). However, this test is challenging to perform. Several studies have investigated inverse analysis to determine this behavior through simplified tests, such as the bending test. This study deals with developing a new approach to perform an inverse analysis for the three-point bending test (3PBT) involving FRC. A new proposed methodology concerns carrying out the inverse analysis procedure by parts. Initially, the parameters that influence the initial part of the stress–crack opening curve are adjusted. Progressively, the other parameters are adjusted considering the increment of the curve section. This procedure provides an implemented algorithm with more efficiency. A new strategy that deals with the establishment of criteria for parameters is proposed. Its results are compared with experimental data from other literature, whose steel fiber-reinforced concrete (SFRC) tested characteristics present different attributes such as fibers, shape, and length. The proposed methodology obtained the stress–crack opening curves in direct tension with reasonable accuracy, indicating that this methodology can be helpful in the characterization of the post-cracking FRC behavior.
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spelling doaj.art-998b3867b3994228b75a8cd6f279367c2023-11-18T00:44:27ZengMDPI AGBuildings2075-53092023-04-01135116610.3390/buildings13051166A Simplified Inverse Analysis Procedure for the Stress-Crack Opening Relationship of Fiber-Reinforced ConcretePedro Paulo Martins de Carvalho0Rodrigo de Melo Lameiras1Center of Exact Sciences and Technologies, Federal University of Western Bahia, Barreiras 47810-047, BA, BrazilPostgraduate Program in Structures and Civil Construction, University of Brasilia, Brasilia 70910-900, DF, BrazilThe direct tensile test (DTT) is the most recommended test to determine the tensile behavior of fiber-reinforced concrete (FRC). However, this test is challenging to perform. Several studies have investigated inverse analysis to determine this behavior through simplified tests, such as the bending test. This study deals with developing a new approach to perform an inverse analysis for the three-point bending test (3PBT) involving FRC. A new proposed methodology concerns carrying out the inverse analysis procedure by parts. Initially, the parameters that influence the initial part of the stress–crack opening curve are adjusted. Progressively, the other parameters are adjusted considering the increment of the curve section. This procedure provides an implemented algorithm with more efficiency. A new strategy that deals with the establishment of criteria for parameters is proposed. Its results are compared with experimental data from other literature, whose steel fiber-reinforced concrete (SFRC) tested characteristics present different attributes such as fibers, shape, and length. The proposed methodology obtained the stress–crack opening curves in direct tension with reasonable accuracy, indicating that this methodology can be helpful in the characterization of the post-cracking FRC behavior.https://www.mdpi.com/2075-5309/13/5/1166inverse analysiscrack lengthstress–crack widthsteel fiber-reinforced concretethree-point bending testpost-cracking behavior
spellingShingle Pedro Paulo Martins de Carvalho
Rodrigo de Melo Lameiras
A Simplified Inverse Analysis Procedure for the Stress-Crack Opening Relationship of Fiber-Reinforced Concrete
Buildings
inverse analysis
crack length
stress–crack width
steel fiber-reinforced concrete
three-point bending test
post-cracking behavior
title A Simplified Inverse Analysis Procedure for the Stress-Crack Opening Relationship of Fiber-Reinforced Concrete
title_full A Simplified Inverse Analysis Procedure for the Stress-Crack Opening Relationship of Fiber-Reinforced Concrete
title_fullStr A Simplified Inverse Analysis Procedure for the Stress-Crack Opening Relationship of Fiber-Reinforced Concrete
title_full_unstemmed A Simplified Inverse Analysis Procedure for the Stress-Crack Opening Relationship of Fiber-Reinforced Concrete
title_short A Simplified Inverse Analysis Procedure for the Stress-Crack Opening Relationship of Fiber-Reinforced Concrete
title_sort simplified inverse analysis procedure for the stress crack opening relationship of fiber reinforced concrete
topic inverse analysis
crack length
stress–crack width
steel fiber-reinforced concrete
three-point bending test
post-cracking behavior
url https://www.mdpi.com/2075-5309/13/5/1166
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