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Rock Mechanics and Rock Engineering

, Volume 52, Issue 1, pp 97–106 | Cite as

Mechanical Behavior and Damage Constitutive Model of Rock Subjected to Water-Weakening Effect and Uniaxial Loading

  • Kang BianEmail author
  • Jian Liu
  • Wei Zhang
  • Xiaoqing Zheng
  • Shaohu Ni
  • Zhenping Liu
Original Paper
  • 283 Downloads

Abstract

Water-weakening effect is one of the most important causes triggering large deformation and failure of soft-rock engineering; however, few studies have paid attention to damage evolution and constitutive relationship of rock in water-weakening process. In this paper, laboratory tests are first carried out to estimate the evolution of mechanical properties along with changes of immersion time for shale samples. Then with the aid of X-ray diffraction and scanning electron microscope, mechanism of parameter degradation for shale under immersion conditions is investigated from the microscopic perspective. Based on the generalized strain equivalent principle and the theory of statistical microscopic damage mechanics, a damage constitutive model of rock subjected to water-weakening effect and uniaxial loading is established by considering the influence of void-compression stage, and the proposed model is verified to be in good agreement with the experiment results. This paper provides an effective approach to analyze the constitutive relationship of rock subjected to water-weakening effect and uniaxial loading.

Keywords

Damage constitutive model Water weakening Uniaxial loading Immersion time Microstructure 

Notes

Acknowledgements

The authors gratefully acknowledge the support by the National Key R&D Program of China (Grant no. 2016YFC0401802), the State Key Program of National Natural Science of China (Grant no. 51539002), the National Natural Science Foundation of China (nos. 51779249, 51209198, 51204158 and 51409265), the Natural Science Foundation of Hubei Province (Grant no. 2018CFB632) and the Natural Science Foundation of Zhejiang Province (Grant no. LY13E090003).

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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2018

Authors and Affiliations

  • Kang Bian
    • 1
    • 2
    Email author
  • Jian Liu
    • 1
    • 2
  • Wei Zhang
    • 3
  • Xiaoqing Zheng
    • 4
  • Shaohu Ni
    • 5
  • Zhenping Liu
    • 1
    • 2
  1. 1.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil MechanicsChinese Academy of ScienceWuhanChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.College of Water Conservancy and Civil EngineeringSouth China Agricultural UniversityGuangzhouChina
  4. 4.Zhejiang Provincial Institute of Communications Planning, Design and ResearchHangzhouChina
  5. 5.Power China Huadong Engineering Corporation LimitedHangzhouChina

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