Probabilistic slope stability analysis by finite elements
Probabilistic slope stability analysis by finite elements
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DOI：
10.1061/(asce)1090-0241(2004)130:5(507
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发表时间：
2004-05-01
影响因子：
3.9
通讯作者：
Fenton, GA
中科院分区：
文献类型：
--
作者：
Griffiths, DV;Fenton, GA
在本文中，我们使用简单和更先进的概率分析工具研究粘性边坡破坏的概率。彻底研究了局部平均对测试问题失败概率的影响。在简单的方法中。使用经典的边坡稳定性分析技术，并将抗剪强度视为单个随机变量。这种先进方法称为随机有限元法 (RFEM)，将弹塑性与随机场理论相结合。 RFEM 方法与传统的概率边坡稳定技术相比具有许多优势，因为它可以通过“寻找”最关键的机制使边坡破坏自然发展。这项工作中特别重要的结论是，简化的概率分析（其中通过假设完美相关性来忽略空间变异性）可能会导致对故障概率的不保守估计。这与其他使用经典边坡稳定性分析工具的研究人员的发现相矛盾。
In this paper we investigate the probability of failure of a cohesive slope using both simple and more advanced probabilistic analysis tools. The influence of local averaging on the probability of failure of a test problem is thoroughly investigated. In the simple approach. classical slope stability analysis techniques are used, and the shear strength is treated as a single random variable. The advanced method, called the random finite-element method (RFEM), uses elastoplasticity combined with random field theory. The RFEM method is shown to offer many advantages over traditional probabilistic slope stability techniques, because it enables slope failure to develop naturally by "seeking out" the most critical mechanism. Of particular importance in this work is the conclusion that simplified probabilistic analysis, in which spatial variability is ignored by assuming perfect correlation, can lead to unconservative estimates of the probability of failure. This contradicts the findings of other investigators who used classical slope stability analysis tools.