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Volume 40 Issue 1
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LIU Wu. Coupled damage and friction model for persistent fractured rocks considering multi-scale structures[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(1): 147-154. DOI: 10.11779/CJGE201801015
Citation: LIU Wu. Coupled damage and friction model for persistent fractured rocks considering multi-scale structures[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(1): 147-154. DOI: 10.11779/CJGE201801015
shu

Coupled damage and friction model for persistent fractured rocks considering multi-scale structures

  • 1.School of Civil Engineering, Hefei University of Technology, Hefei 230009, China
    2.Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering of Ministry of Education, Wuhan University, Wuhan 430072, China

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  • Received Date: October 23, 2016
  • Published Date: January 24, 2018
    Graphical Abstract
    • Abstract
  • A coupled damage and friction constitutive model for persistent jointed rocks based on a two-step homogenization technique is proposed considering the influences of anisotropic damage growth of intact rocks, mobilized dilatancy behavior of microcracks, recovery of normal stiffness due to normal closure of closed microcracks, mobilized degradation of multi-order asperities of joints, shear dilatancy of joints, and interaction between joints and rocks. The effects of multi-scale structures (i.e., joint and microcracks) on the deformation characteristics of fractured rocks are better addressed by the proposed model. The existing laboratory triaxial compression tests on crystalline rocks, shear tests on joint specimens, together with triaxial compressive strength tests on Martinsburg slate under different confining pressures and joint configurations, are used to validate the proposed model. The good agreements between the model predictions and the test results demonstrate the accuracy of the proposed model.
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    • References (24)
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