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Volume 34 Issue 1
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LI Dian-qing, JIANG Shui-hua, ZHOU Chuang-bing. Reliability analysis of underground rock caverns using non-intrusive stochastic finite element method[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(1): 123-129.
Citation: LI Dian-qing, JIANG Shui-hua, ZHOU Chuang-bing. Reliability analysis of underground rock caverns using non-intrusive stochastic finite element method[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(1): 123-129.
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Reliability analysis of underground rock caverns using non-intrusive stochastic finite element method

  • 1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 2. Key Laboratory of Rock Mechanics in Hydraulic Structural EngineeringWuhan University) , Ministry of Education , Wuhan 430072 , China)

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  • Received Date: March 27, 2011
  • Published Date: January 19, 2012
    Graphical Abstract
    • Abstract
  • A non-intrusive finite element method for the reliability analysis of deformation for underground rock caverns is proposed. First, the polynomial chaos expansion is introduced. The software SIGMA/W is selected to perform the deterministic FEM analysis. Thereafter, a procedure for the interface between stochastic analysis module and software SIGMA/W is presented, and a flowchart is provided as well. The non-intrusive finite element method means there is no need for user-intervention during the calculation of the deterministic finite element code while the normal stochastic finite element methods always do. This is of practical advantage that realistic probabilistic analyses become possible for the practitioners. The computational efficiency of the proposed method is significantly higher than that of the traditional Monte Carlo simulation. It can serve as an alternate method for the reliability analysis of complex geotechnical problems. The liner supporting can improve the reliability of the underground rock caverns effectively. The sensitivity results indicate that the elastic modulus is the most significant random variable, whereas the unit weight almost has no influence on the reliability results. Therefore, to improve the reliability of the underground rock caverns effectively, a detailed geological investigation should be conducted to reduce the uncertainty in the elastic modulus of rock mass.
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