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Influence of surface roughness on shear behaviors of rock joints under constant normal load and stiffness boundary conditions

Author

Listed:
  • Guansheng Han

    (Shaoxing University
    Nagasaki University)

  • Yu Zhou

    (Shaoxing University)

  • Richeng Liu

    (China University of Mining and Technology)

  • Qiongqiong Tang

    (Shaoxing University)

  • Xingkai Wang

    (Shaoxing University)

  • Leibo Song

    (Shaoxing University)

Abstract

The present study experimentally investigated the shear behaviors of artificial rock samples containing single or double joints under constant normal load (CNL) and constant normal stiffness (CNS) boundary conditions. The influence of surface roughness represented by joint roughness coefficient (JRC) on the evolutions of shear stress, normal stress, and normal displacement as well as the failure mode are analyzed and discussed. The results show that the peak shear stress and peak normal displacement are increased by 104 and 45.1% for single-joint specimens, which are increased by 50.1 and 182.8% for double-joint specimens when JRC ranges from 3.21 to 12.16 under CNL boundary conditions. Under a CNS boundary condition, the shear stress for single-joint and double-joint specimens increases slowly with the increase in shear displacement, and no obvious peak value is observed. However, the shear stress of double-joint specimen is lower than that of single-joint specimen due to that the former has a more complex joint structure. The surface damage degree of the upper joint is larger than that of the lower joint, and the surface failure of the lower joint lags behind that of the upper joint.

Suggested Citation

  • Guansheng Han & Yu Zhou & Richeng Liu & Qiongqiong Tang & Xingkai Wang & Leibo Song, 2022. "Influence of surface roughness on shear behaviors of rock joints under constant normal load and stiffness boundary conditions," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 112(1), pages 367-385, May.
  • Handle: RePEc:spr:nathaz:v:112:y:2022:i:1:d:10.1007_s11069-021-05185-8
    DOI: 10.1007/s11069-021-05185-8
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    References listed on IDEAS

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    1. Ting-Kai Nian & Zhong-Kai Feng & Peng-Cheng Yu & Hui-Jun Wu, 2013. "Strength behavior of slip-zone soils of landslide subject to the change of water content," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 68(2), pages 711-721, September.
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    Cited by:

    1. Leibo Song & Dan Zhang & Gang Wang & ShiGui Du & Gaojian Hu & Guansheng Han & Xingkai Wang & Xiqi Liu, 2023. "Evaluation method of local failure characteristics for joint based on white light scanning technology," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 116(1), pages 97-110, March.
    2. Qi Zhang & Jin Luo & Sai Wang & Jinsong Zhu & Deshan Cui, 2024. "Shear Behavior of Two-Dimensional Propped Rough Fractures," Energies, MDPI, vol. 17(4), pages 1-15, February.

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