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Volume 35 Issue 7
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YANG Xin-guang, CHI Shi-chun. Lower bound FEM for limit aseismic capability of earth-rockfill dams[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(7): 1202-1209.
Citation: YANG Xin-guang, CHI Shi-chun. Lower bound FEM for limit aseismic capability of earth-rockfill dams[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(7): 1202-1209.
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Lower bound FEM for limit aseismic capability of earth-rockfill dams

  • State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China

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  • Received Date: August 30, 2012
  • Published Date: July 16, 2013
    Graphical Abstract
    • Abstract
  • An FEM based on the lower bound theorem of limit analysis is proposed to study the limit aseismic capability of earth-rock-fill dams. Considering the large internal friction angel and non-linear shear strength parameters of rockfill materials, the proposed method formulates the limit analysis as a second-order cone programming (SOCP) problem with constraints based on the conditions of equilibrium, stress discontinuity, stress boundary and native Mohr-Coulomb yield criterion. The lower bound of the limit aseismic capability is then obtained by means of the interior-point algorithm and the iterative approach. Comparison with the published solutions illustrates the correctness and effectiveness of the proposed method for a smooth strip footing problem. The proposed approach is also applied to the seismic stability analysis of a typical rockfill dam with core wall so that the limit aseismic capability of the dam is obtained. The results proclaim the seismic failure mechanisms of earth-rockfill dams and demonstrate the practical value of the proposed method.
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