On the Assessment of Failure in Slope Stability Analysis by the Finite Element Method
On the Assessment of Failure in Slope Stability Analysis by the Finite Element Method
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DOI：
10.1007/s00603-007-0129-8
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发表时间：
2008-08
影响因子：
6.2
通讯作者：
H. Zheng;D. F. Liu;C. G. Li
中科院分区：
文献类型：
--
作者：
H. Zheng;D. F. Liu;C. G. Li
极限平衡法使工程师可以快速评估斜坡的稳定性。然而，无论分析考虑(1)新建路堤的坡度，(2)最近开挖的坡度，还是(3)现有的天然坡度，这些步骤都是相同的。这些边坡内的应力受K0、侧向与竖向有效应力之比以及填土、开挖、加固等施工过程的强烈影响，但传统的极限平衡方法忽略了这些重要特征(Abramson等人，1996)。在现实中，这些斜坡内的应力分布会有所不同，因此会对其稳定性产生重大影响。虽然有限元方法的功能足以绕过极限平衡方法固有的许多缺陷，但矛盾的是，它也引入了复杂性，导致有限元方法在分析斜坡问题方面的应用有限。在传统的极限平衡法中，破坏可以被描述为FOS小于1的条件。在有限元分析中，一直没有公认的边坡破坏准则。一些常用的故障标准包括：
The limit equilibrium methods allow engineers to assess the stability of slopes quickly. However, these procedures are the same whether the analysis considers (1) slope of a newly constructed embankment,(2) slope of a recent excavation, or (3) an existing natural slope. The stresses within these slopes are strongly influenced by K0, the ratio of lateral to vertical normal effective stress and construction processes involving filling, excavating, reinforcing, and so on, but the conventional limit equilibrium methods ignore these important features (Abramson et al., 1996). In reality, the stress distributions within these slopes would be different and hence significantly influence their stability. Although the finite element method is powerful enough to bypass many of the deficiencies that are inherent in the limit equilibrium methods, paradoxically it also introduces complexities that have resulted in its limited use to analyze slope problems. In a conventional limit equilibrium approach, failure may be described as the condition of an FOS less than unity. In the FEM, there has been no generally accepted failure criterion of slope. Some of the popular failure criteria in use are: