摘要
考虑设计参数的不确定因素进行工程随机力学分析具有重要的理论和现实意义。以可靠度理论为基础,考虑土体材料的随机特性,提出了应用于边坡工程可靠度分析的随机有限元的基本思路,并导出了边坡稳定可靠度的计算公式,通过编制实用程序计算相应的可靠指标,并寻求失稳模式进行了边坡工程的整体稳定可靠度分析。最后对一工程实例进行了计算分析,结果表明,该方法用于边坡整体稳定可靠度分析是切实可行的,同时得到了随机变量选取对可靠指标影响的一些规律,可供相关工程技术人员参考。
Based on the theory of reliability and the consideration of stochastic property of soil, the basic idea about the stochastic finite element method used to analyze the reliability of slope stability is presented in this paper, then the reliability formula of slope stability is deduced and the applied program is developed to calculate the corresponding reliability index. The integrated reliability of the slope stability is analyzed by searching instability pattern. Finally, an engineering example shows that the method used to analyze the integrated reliability of the slope stability is feasible and practical, and some influencing rules of selection of stochastic variable on the reliability index are obtained that could give a reference to relative engineering and technical Personnel.
出处
《自然灾害学报》
CSCD
北大核心
2008年第2期110-115,共6页
Journal of Natural Disasters
关键词
可靠度理论
随机有限元
边坡稳定
随机变量
reliability theory
stochastic finite element
slope stability
stochastic variable
