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土石坝坡极限抗震能力的下限有限元法

杨昕光, 迟世春

杨昕光, 迟世春. 土石坝坡极限抗震能力的下限有限元法[J]. 岩土工程学报, 2013, 35(7): 1202-1209.
引用本文: 杨昕光, 迟世春. 土石坝坡极限抗震能力的下限有限元法[J]. 岩土工程学报, 2013, 35(7): 1202-1209.
shu
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.
shu

土石坝坡极限抗震能力的下限有限元法  English Version

  • 大连理工大学海岸与近海工程国家重点实验室，辽宁 大连116024

基金项目: 《岩土工程学报》创办于1979年，是我国水利、土木、力学、建筑、水电、振动等六个全国性学会联合主办的学术性科技期刊。由南京水利科学研究院承办，国内外公开发行。主要刊登土力学、岩石力学领域中能代表当今先进理论和实践水平的科学研究和工程实践成果等。报道新理论、新技术、新仪器、新材料的研究和应用。欢迎国家自然科学基金项目及其他重要项目的研究成果向本刊投稿，倡导和鼓励有实践经验的作者撰稿，并优先刊用这些稿件。主要栏目有论文、短文、工程实录、焦点论坛、学术讨论和动态简讯等。
详细信息
    作者简介:

    杨昕光(1983- )，男，内蒙古赤峰人，博士研究生，主要从事土石坝地震工程、土工数值计算与分析等方面研究。E-mail: yyfreshman@163.com。

  • 中图分类号: TV641

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

摘要

    摘要
  • 摘要: 基于极限分析下限定理，假设材料严格服从Mohr-Coulomb屈服准则，同时考虑了堆石料内摩擦角较大以及抗剪强度具有非线性的特性，提出了一个用于求解土石坝坝坡极限抗震能力的有限元计算方法。该方法通过静力平衡条件、应力间断面连续条件、边界条件、屈服条件以及所求极限荷载，形成标准的二次锥规划数学模型，并用内点法进行优化迭代求解，得到土石坝坡极限抗震能力的下限值。对一条形基础地基承载力进行下限极限分析，通过与已有计算结果比较表明所提方法的具有很高的计算精度。运用所提方法对一典型心墙土石坝进行抗震极限分析，其计算结果符合土石坝坡在地震作用下的一般破坏规律，证明此方法具有很高的实用价值。
    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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出版历程
  • 收稿日期:  2012-08-30
  • 发布日期:  2013-07-16

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