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Research on the Stability of Arc-Fractured Rock–Concrete Composites: Mechanical Response and Energy Evolution.

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Τίτλος: Research on the Stability of Arc-Fractured Rock–Concrete Composites: Mechanical Response and Energy Evolution.
Συγγραφείς: Zhang, Shubing1 (AUTHOR), Zhao, Hongkai1 (AUTHOR), Hong, Bonan1 (AUTHOR), Pan, Chuangchuang2 (AUTHOR)
Πηγή: International Journal of Geomechanics. Oct2026, Vol. 26 Issue 10, p1-16. 16p.
Θεματικοί όροι: *Damage models, *Discrete element method, *Deformations (Mechanics), *Energy conversion, *Materials compression testing, *Cement composites
Περίληψη: To mitigate the violent movement of overlying strata in goaf areas, rock–concrete composite support systems are widely utilized. However, the mechanical behavior of such systems under the influence of complex pre-existing defects, such as arc-shaped fractures, remains insufficiently understood. This study aims to clarify the failure mechanisms and the evolution of stability in these composites by evaluating the influence of fracture inclination angles. A synergistic methodology was adopted, combining laboratory uniaxial compression tests with discrete-element method simulations. Based on energy dissipation theory and the strain equivalence hypothesis, a statistical damage constitutive model was established to bridge the gap between microscopic damage and macroscopic mechanical response. The results demonstrate that fracture inclination significantly dictates the energy partitioning and crack propagation patterns within the composite. The established constitutive model, validated by numerical results (R2 > 0.999), effectively quantifies how increasing inclination angles enhance energy absorption efficiency and retard structural damage progression. Due to the high toughness of the concrete component, the composite maintains substantial residual bearing capacity, preventing instantaneous failure. These findings provide a robust theoretical framework and practical guidance for optimizing support designs in deep underground excavations with intricate geological defects. [ABSTRACT FROM AUTHOR]
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  Label: Title
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  Data: Research on the Stability of Arc-Fractured Rock–Concrete Composites: Mechanical Response and Energy Evolution.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Shubing%22">Zhang, Shubing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Hongkai%22">Zhao, Hongkai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hong%2C+Bonan%22">Hong, Bonan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pan%2C+Chuangchuang%22">Pan, Chuangchuang</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Geomechanics%22">International Journal of Geomechanics</searchLink>. Oct2026, Vol. 26 Issue 10, p1-16. 16p.
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  Data: *<searchLink fieldCode="DE" term="%22Damage+models%22">Damage models</searchLink><br />*<searchLink fieldCode="DE" term="%22Discrete+element+method%22">Discrete element method</searchLink><br />*<searchLink fieldCode="DE" term="%22Deformations+%28Mechanics%29%22">Deformations (Mechanics)</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+conversion%22">Energy conversion</searchLink><br />*<searchLink fieldCode="DE" term="%22Materials+compression+testing%22">Materials compression testing</searchLink><br />*<searchLink fieldCode="DE" term="%22Cement+composites%22">Cement composites</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To mitigate the violent movement of overlying strata in goaf areas, rock–concrete composite support systems are widely utilized. However, the mechanical behavior of such systems under the influence of complex pre-existing defects, such as arc-shaped fractures, remains insufficiently understood. This study aims to clarify the failure mechanisms and the evolution of stability in these composites by evaluating the influence of fracture inclination angles. A synergistic methodology was adopted, combining laboratory uniaxial compression tests with discrete-element method simulations. Based on energy dissipation theory and the strain equivalence hypothesis, a statistical damage constitutive model was established to bridge the gap between microscopic damage and macroscopic mechanical response. The results demonstrate that fracture inclination significantly dictates the energy partitioning and crack propagation patterns within the composite. The established constitutive model, validated by numerical results (R2 > 0.999), effectively quantifies how increasing inclination angles enhance energy absorption efficiency and retard structural damage progression. Due to the high toughness of the concrete component, the composite maintains substantial residual bearing capacity, preventing instantaneous failure. These findings provide a robust theoretical framework and practical guidance for optimizing support designs in deep underground excavations with intricate geological defects. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1061/IJGNAI.GMENG-13930
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 16
        StartPage: 1
    Subjects:
      – SubjectFull: Damage models
        Type: general
      – SubjectFull: Discrete element method
        Type: general
      – SubjectFull: Deformations (Mechanics)
        Type: general
      – SubjectFull: Energy conversion
        Type: general
      – SubjectFull: Materials compression testing
        Type: general
      – SubjectFull: Cement composites
        Type: general
    Titles:
      – TitleFull: Research on the Stability of Arc-Fractured Rock–Concrete Composites: Mechanical Response and Energy Evolution.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Zhang, Shubing
      – PersonEntity:
          Name:
            NameFull: Zhao, Hongkai
      – PersonEntity:
          Name:
            NameFull: Hong, Bonan
      – PersonEntity:
          Name:
            NameFull: Pan, Chuangchuang
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      – BibEntity:
          Dates:
            – D: 01
              M: 10
              Text: Oct2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 15323641
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            – Type: volume
              Value: 26
            – Type: issue
              Value: 10
          Titles:
            – TitleFull: International Journal of Geomechanics
              Type: main
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