New Method for Determination of Residual Strength Parameters and Critical Damage Value

  • Qiao Jiang
    Affiliation

    College of Hydraulic& Environmental Engineering, China Three Gorges University, Yichang City,Hubei Province, 443002, China; Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education, China Three Gorges University, Yichang City,Hubei Province, 443002, China

  • Jianlin Li
    Affiliation

    College of Hydraulic& Environmental Engineering, China Three Gorges University, Yichang City,Hubei Province, 443002, China; Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education, China Three Gorges University, Yichang City,Hubei Province, 443002, China

  • Yanhai Wang
    Affiliation

    Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education, China Three Gorges University, Yichang City,Hubei Province, 443002, China

  • Zuosen Luo
    Affiliation

    Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education, China Three Gorges University, Yichang City,Hubei Province, 443002, China

  • Tao Li
    Affiliation

    Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education, China Three Gorges University, Yichang City,Hubei Province, 443002, China

  • Hengbin Zhang
    Affiliation

    Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education, China Three Gorges University, Yichang City,Hubei Province, 443002, China

  • Eleyas Assefa
    Affiliation

    College of Architecture and Civil Engineering, Addis Ababa Science and Technology University, Addis Ababa, P.O.B. 16417, Ethiopia

  • Huafeng Deng
    Affiliation

    Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education, China Three Gorges University, Yichang City,Hubei Province, 443002, China

Abstract

Residual strength and critical damage parameters are worthy to evaluate the stability of engineered rock masses. In this paper, new thinking, repeated load test on a single specimen was proposed to measure the residual strength of the rock. And author proposed to modify the critical damage value based on residual constitutive energy. The test results showed that: (1) the residual strength of rock is mainly controlled by the confining pressure, without a clear relationship with the confining pressure and stress path of the initial loading failure. (2) The residual strength parameters of the rock specimens under repeated loading test are consistent with the conventional triaxial test. Most importantly, the proposed method is relatively less dispersion, cheap, reliable, and time-saving. (3) The corrected critical damage value was reasonable. Relevant test methods can provide a useful reference for the determination of residual strength parameters and critical damage value.

Keywords: single specimen method, repeated loading, residual strength, critical damage value, dispersion
Published online
2019-04-25
How to Cite
Jiang, Q., Li, J., Wang, Y., Luo, Z., Li, T., Zhang, H., Assefa, E., Deng, H. “New Method for Determination of Residual Strength Parameters and Critical Damage Value”, Periodica Polytechnica Civil Engineering, 63(2), pp. 569-576, 2019. https://doi.org/10.3311/PPci.13817
Section
Research Article