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边坡稳定分析的虚功率法

吴梦喜 杨家修 湛正刚

吴梦喜, 杨家修, 湛正刚. 边坡稳定分析的虚功率法[J]. 力学学报, 2020, 52(3): 663-672. doi: 10.6052/0459-1879-20-040
引用本文: 吴梦喜, 杨家修, 湛正刚. 边坡稳定分析的虚功率法[J]. 力学学报, 2020, 52(3): 663-672. doi: 10.6052/0459-1879-20-040
Wu Mengxi, Yang Jiaxiu, Zhan Zhenggang. A VIRTUAL POWER SLOPE STABILITY ANALYSIS METHOD[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 663-672. doi: 10.6052/0459-1879-20-040
Citation: Wu Mengxi, Yang Jiaxiu, Zhan Zhenggang. A VIRTUAL POWER SLOPE STABILITY ANALYSIS METHOD[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 663-672. doi: 10.6052/0459-1879-20-040

边坡稳定分析的虚功率法

doi: 10.6052/0459-1879-20-040
基金项目: 1)国家重点研发计划资助项目(2017YFC1501100)
详细信息
    通讯作者:

    2)吴梦喜, 高工, 主要研究方向: 岩土工程渗流、应力变形与稳定性分析方法、软件和工程应用. E-mail: wumx@imech.ac.cn

  • 中图分类号: TU4

A VIRTUAL POWER SLOPE STABILITY ANALYSIS METHOD

  • 摘要: 基于有限元计算所得应力场的改进极限平衡法, 对渗流与有效应力耦合作用强烈的边坡或地基的稳定性分析具有优势. 本文提出了边坡稳定分析的虚功率法, 即基于极限分析的上限定理, 利用机动许可的组合刚体滑动机构和有限元应力场, 用滑动机构的速度间断面上的抗滑力功率与滑动力功率的比值计算安全系数. 通过分步优化方法, 获得边坡给定滑动机制的稳定安全系数. 对2个典型折线滑动机构的边坡案例进行了分析, 比较了采用静力平衡应力场和静力许可应力场对安全系数的影响. 指出基于土体线弹性本构模型所得的有效应力场计算的稳定安全系数, 也是边坡稳定安全性的一个不错的度量. 算例中本文计算所得的边坡稳定安全系数, 与文献中推荐的答案很接近, 其滑动机制与有限元强度折减法分析所得的滑动机制基本一致, 安全系数也接近, 表明本文提出的方法是合理的边坡稳定分析新方法, 为边坡和地基的稳定性分析提供了新的选择.

     

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出版历程
  • 收稿日期:  2019-02-15
  • 刊出日期:  2020-06-10

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