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Volume 41 Issue 12
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WANG Gang, ZHANG Shu-bo, LIAN Lian, ZHAO Cheng, WANG Ke, ZHANG Xian-da. Macro-micro study on shear failure mechanism of rock joint based on zero-thickness cohesive element[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(12): 2224-2232. DOI: 10.11779/CJGE201912007
Citation: WANG Gang, ZHANG Shu-bo, LIAN Lian, ZHAO Cheng, WANG Ke, ZHANG Xian-da. Macro-micro study on shear failure mechanism of rock joint based on zero-thickness cohesive element[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(12): 2224-2232. DOI: 10.11779/CJGE201912007
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Macro-micro study on shear failure mechanism of rock joint based on zero-thickness cohesive element

  • 1. Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, China;
    2. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China;
    3. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
    4. Institute of Technology, Tibet University, Lhasa 850000, China

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  • Received Date: March 18, 2019
  • Published Date: December 24, 2019
    Graphical Abstract
    • Abstract
  • In order to explore their shear process and failure types with different roughnesses, the ABAQUS finite element analysis software is used to simulate the shearing process of jointed rock masses under constant normal load by using the method of globally embedded zero-thickness cohesion elements. The correctness of the numerical model is confirmed by comparing the results of laboratory shear tests and numerical simulations, and the shear failure behavior of the jointed rock masses is analyzed from the macro-micro perspective. The results show that the method of global embedded zero-thickness cohesive elements to simulate the shear process of jointed rock masses is accurate and can truly reflect the microscopic process of rock joint failure. The shear peak strength of joint samples with different roughnesses increases with the roughness under constant normal load. The shear process of jointed rock masses can be divided into four stages: linearly elastic strengthening stage, crack strengthening stage, plastic softening stage and residual strength stage. The joints of rock masses with different roughnesses have different types of failure during the shearing process, and the shear failure of rock masses can be roughly divided into three types under the constant normal load, which are slip failure, local shear failure and gear cutting failure.
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    • References (27)
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