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A Microplane Constitutive Model for SFRC Subjected to High Temperatures.

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Title: A Microplane Constitutive Model for SFRC Subjected to High Temperatures.
Authors: Ripani, Marianela1,2,3 (AUTHOR), Vrech, Sonia1,2,4 (AUTHOR), Caggiano, Antonio3,5 (AUTHOR) antonio.caggiano@unige.it, Folino, Paula3,4,6 (AUTHOR)
Source: Materials (1996-1944). Jun2026, Vol. 19 Issue 11, p2229. 21p.
Subjects: Fiber-reinforced concrete, Temperature effect, Crack propagation, Deterioration of materials, Fracture mechanics, Failure analysis
Abstract: Highlights: Thermodynamically consistent microplane model for heated SFRC. Temperature-dependent degradation of matrix and fiber interactions. Residual constitutive behavior described by crack opening/slip laws. Acoustic tensor analysis used to identify bifurcation conditions. Failure orientation evaluated for different thermal conditions. Despite the low thermal conductivity that characterizes the mechanical behavior of cementitious composites like concrete, high temperatures acting for long periods could have devastating effects on the overall integrity and stability of structures. Such damage encompasses not only the structural but also the material level, manifested as a degradation of the strength and stiffness properties together with increasing porosity and the consequent cohesion loss. Adding fibers to the cementitious matrix is a strategy that increases the fire resistance of structures, improving the fracture energy release capacity beyond the peak strength. This fact has been experimentally demonstrated in numerous publications and requires the development of advanced computational constitutive models with the aim of predicting the evolution of both elastic properties and failure behavior in fiber-reinforced concrete. In this work, a temperature-dependent, thermodynamically consistent microplane material model based on the smeared crack approach is developed to simulate the mechanical behavior of preheated steel fiber-reinforced concrete (SFRC) under residual conditions. The influence of high temperatures on the material response is evaluated in terms of stress versus crack opening displacement or crack slip curves, whereas the failure analysis in the form of discontinuous bifurcation is addressed by means of numerical analysis of the acoustic tensor, identifying the critical orientation for varying temperature levels, material properties and boundary conditions. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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An: 194587140
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  Data: A Microplane Constitutive Model for SFRC Subjected to High Temperatures.
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  Data: <searchLink fieldCode="AR" term="%22Ripani%2C+Marianela%22">Ripani, Marianela</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vrech%2C+Sonia%22">Vrech, Sonia</searchLink><relatesTo>1,2,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Caggiano%2C+Antonio%22">Caggiano, Antonio</searchLink><relatesTo>3,5</relatesTo> (AUTHOR)<i> antonio.caggiano@unige.it</i><br /><searchLink fieldCode="AR" term="%22Folino%2C+Paula%22">Folino, Paula</searchLink><relatesTo>3,4,6</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Jun2026, Vol. 19 Issue 11, p2229. 21p.
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  Data: <searchLink fieldCode="DE" term="%22Fiber-reinforced+concrete%22">Fiber-reinforced concrete</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink><br /><searchLink fieldCode="DE" term="%22Crack+propagation%22">Crack propagation</searchLink><br /><searchLink fieldCode="DE" term="%22Deterioration+of+materials%22">Deterioration of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Fracture+mechanics%22">Fracture mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Failure+analysis%22">Failure analysis</searchLink>
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  Data: Highlights: Thermodynamically consistent microplane model for heated SFRC. Temperature-dependent degradation of matrix and fiber interactions. Residual constitutive behavior described by crack opening/slip laws. Acoustic tensor analysis used to identify bifurcation conditions. Failure orientation evaluated for different thermal conditions. Despite the low thermal conductivity that characterizes the mechanical behavior of cementitious composites like concrete, high temperatures acting for long periods could have devastating effects on the overall integrity and stability of structures. Such damage encompasses not only the structural but also the material level, manifested as a degradation of the strength and stiffness properties together with increasing porosity and the consequent cohesion loss. Adding fibers to the cementitious matrix is a strategy that increases the fire resistance of structures, improving the fracture energy release capacity beyond the peak strength. This fact has been experimentally demonstrated in numerous publications and requires the development of advanced computational constitutive models with the aim of predicting the evolution of both elastic properties and failure behavior in fiber-reinforced concrete. In this work, a temperature-dependent, thermodynamically consistent microplane material model based on the smeared crack approach is developed to simulate the mechanical behavior of preheated steel fiber-reinforced concrete (SFRC) under residual conditions. The influence of high temperatures on the material response is evaluated in terms of stress versus crack opening displacement or crack slip curves, whereas the failure analysis in the form of discontinuous bifurcation is addressed by means of numerical analysis of the acoustic tensor, identifying the critical orientation for varying temperature levels, material properties and boundary conditions. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.3390/ma19112229
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 21
        StartPage: 2229
    Subjects:
      – SubjectFull: Fiber-reinforced concrete
        Type: general
      – SubjectFull: Temperature effect
        Type: general
      – SubjectFull: Crack propagation
        Type: general
      – SubjectFull: Deterioration of materials
        Type: general
      – SubjectFull: Fracture mechanics
        Type: general
      – SubjectFull: Failure analysis
        Type: general
    Titles:
      – TitleFull: A Microplane Constitutive Model for SFRC Subjected to High Temperatures.
        Type: main
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          Name:
            NameFull: Ripani, Marianela
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            NameFull: Vrech, Sonia
      – PersonEntity:
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            NameFull: Caggiano, Antonio
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            NameFull: Folino, Paula
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            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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              Value: 19
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              Value: 11
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            – TitleFull: Materials (1996-1944)
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