Experimental Investigations of Rock Dynamical Characteristics Under Cyclic Loading

  • Xiao-zhang Lei
  • Jian-feng Liu
  • Lu Zheng
  • Lu Wang
  • Hui-ning Xu
Conference paper

Abstract

Rock dynamic characteristics are important factors influencing the long-term stability of rock masses. In addition, they are important parameters for seismic response analysis and safety evaluation. In this study, a solution was discussed for the evaluation of the damping coefficient of rock masses under cyclic loading. Then, low cyclic loading tests with a frequency of 3 Hz were carried out on sandstone samples. Through these tests, the influences of the amplitude stress and cycle number on the dynamic elastic modulus and Poisson’s ratio, damping ratio and coefficient, and their relationships were evaluated. Under the cyclic loading condition, the dynamic elastic modulus and Poisson’s ratio increased parabolically and linearly with the increase in the amplitude stress, respectively; however, the damping ratio and coefficient decreased in accord with a power function. The damping ratio and coefficient increased linearly with the increase in the cycle number, and their increments for low-amplitude stresses were larger than those at high stresses. The results suggest that the damping parameters of rock masses could be obtained from the hysteresis loop measured from the intermediate cycle during a 31-cycle cyclic loading test.

Keywords

Cyclic loading test Dynamic elastic modulus and poisson’s ratio Damping ratio Damping coefficient 

Notes

Acknowledgments

The authors are grateful for the financial support from the National Natural Science Foundation of China (Grant No. 51374148, 51641405), the Science and Technology Project of Sichuan Province (Grant No. 2017JQ0003). The authors wish to offer their gratitude and regard to the colleagues who contributed to this work.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Xiao-zhang Lei
    • 1
    • 2
  • Jian-feng Liu
    • 1
    • 2
  • Lu Zheng
    • 1
  • Lu Wang
    • 1
    • 3
  • Hui-ning Xu
    • 1
    • 2
  1. 1.State Key Laboratory of Hydraulics and Mountain River EngineeringSichuan UniversityChengduChina
  2. 2.Key Laboratory of Energy Engineering, Safety and Mechanics on DisastersSichuan University, Ministry of EducationChengduChina
  3. 3.School of Civil Engineering and EnvironmentXihua UniversityChengduChina

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