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Fire Performance of FRP-Composites and Strengthened Concrete Structures: A State-of-the-Art Review.

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Title: Fire Performance of FRP-Composites and Strengthened Concrete Structures: A State-of-the-Art Review.
Authors: Zhou, Junhao1 (AUTHOR), Zhou, Yingwu1,2 (AUTHOR), Guo, Menghuan1 (AUTHOR), Xiang, Sheng2 (AUTHOR) shengxiang@jnu.edu.cn
Source: Polymers (20734360). Jan2026, Vol. 18 Issue 2, p181. 32p.
Subjects: Fire protection engineering, Thermal stability, Thermolysis, Flame, Thermal insulation, Thermoplastic composites, Concrete construction, Thermal instability
Abstract: The structural application of Fiber-Reinforced Polymers (FRP) is significantly hindered by their inherent thermal sensitivity. This paper presents a comprehensive review of the fire performance of FRP materials and FRP-concrete systems, spanning from material-scale degradation to structural-scale response. Distinct from previous studies, this review explicitly distinguishes between the fire behavior of internally reinforced FRP-reinforced concrete members and externally applied systems, including Externally Bonded Reinforcement (EBR) and Near-Surface Mounted (NSM) techniques. The thermal and mechanical degradation mechanisms of FRP constituents—specifically reinforcing fibers and polymer matrices—are first analyzed, with a focused discussion on the critical role of the glass transition temperature Tg. A detailed comparative analysis of the pros and cons of organic (epoxy-based) and inorganic (cementitious) binders is provided, elaborating on their respective bonding mechanisms and thermal stability under fire conditions. Furthermore, the effectiveness of various fire-protection strategies, such as external insulation systems, is evaluated. Synthesis of existing research indicates that while insulation thickness remains the dominant factor governing the fire survival time of EBR/NSM systems, the irreversible thermal degradation of polymer matrices poses a primary challenge for the post-fire recovery of FRP-reinforced structures. This review identifies critical research gaps and provides practical insights for the fire-safe design of FRP-concrete composite structures. [ABSTRACT FROM AUTHOR]
Copyright of Polymers (20734360) 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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DbLabel: Engineering Source
An: 191214588
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PubTypeId: academicJournal
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  Data: Fire Performance of FRP-Composites and Strengthened Concrete Structures: A State-of-the-Art Review.
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  Data: <searchLink fieldCode="AR" term="%22Zhou%2C+Junhao%22">Zhou, Junhao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Yingwu%22">Zhou, Yingwu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Menghuan%22">Guo, Menghuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiang%2C+Sheng%22">Xiang, Sheng</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> shengxiang@jnu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. Jan2026, Vol. 18 Issue 2, p181. 32p.
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  Data: <searchLink fieldCode="DE" term="%22Fire+protection+engineering%22">Fire protection engineering</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Thermolysis%22">Thermolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Flame%22">Flame</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+insulation%22">Thermal insulation</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoplastic+composites%22">Thermoplastic composites</searchLink><br /><searchLink fieldCode="DE" term="%22Concrete+construction%22">Concrete construction</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+instability%22">Thermal instability</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The structural application of Fiber-Reinforced Polymers (FRP) is significantly hindered by their inherent thermal sensitivity. This paper presents a comprehensive review of the fire performance of FRP materials and FRP-concrete systems, spanning from material-scale degradation to structural-scale response. Distinct from previous studies, this review explicitly distinguishes between the fire behavior of internally reinforced FRP-reinforced concrete members and externally applied systems, including Externally Bonded Reinforcement (EBR) and Near-Surface Mounted (NSM) techniques. The thermal and mechanical degradation mechanisms of FRP constituents—specifically reinforcing fibers and polymer matrices—are first analyzed, with a focused discussion on the critical role of the glass transition temperature Tg. A detailed comparative analysis of the pros and cons of organic (epoxy-based) and inorganic (cementitious) binders is provided, elaborating on their respective bonding mechanisms and thermal stability under fire conditions. Furthermore, the effectiveness of various fire-protection strategies, such as external insulation systems, is evaluated. Synthesis of existing research indicates that while insulation thickness remains the dominant factor governing the fire survival time of EBR/NSM systems, the irreversible thermal degradation of polymer matrices poses a primary challenge for the post-fire recovery of FRP-reinforced structures. This review identifies critical research gaps and provides practical insights for the fire-safe design of FRP-concrete composite structures. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Polymers (20734360) 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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        Value: 10.3390/polym18020181
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        Text: English
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        PageCount: 32
        StartPage: 181
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      – SubjectFull: Fire protection engineering
        Type: general
      – SubjectFull: Thermal stability
        Type: general
      – SubjectFull: Thermolysis
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      – SubjectFull: Flame
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      – SubjectFull: Thermal insulation
        Type: general
      – SubjectFull: Thermoplastic composites
        Type: general
      – SubjectFull: Concrete construction
        Type: general
      – SubjectFull: Thermal instability
        Type: general
    Titles:
      – TitleFull: Fire Performance of FRP-Composites and Strengthened Concrete Structures: A State-of-the-Art Review.
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            NameFull: Zhou, Junhao
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            NameFull: Zhou, Yingwu
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            NameFull: Guo, Menghuan
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              M: 01
              Text: Jan2026
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