何秉顺,孙东亚,芮艳杰,王玉杰.土坡稳定Hasofer-Lind可靠度指标的计算方法[J].中国水利水电科学研究院学报,2010,(4):
土坡稳定Hasofer-Lind可靠度指标的计算方法
The method for Hasofer-Lind reliability index resolution of soil slope stability
  
DOI:
中文关键词:  Hasofer-Lind可靠度指标  优化求解  极限状态方程  变量相关  空间变异
英文关键词:Hasofer-Lind reliability index  optimization resolution  limit state function  variables correlation  spatial variation
基金项目:
作者单位
何秉顺 中国水利水电科学研究院防洪减灾研究所北京100038 
孙东亚 中国水利水电科学研究院防洪减灾研究所北京100038 
芮艳杰 国家知识产权局专利局北京100081 
王玉杰 中国水利水电科学研究院岩土工程研究所北京100038 
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中文摘要:
      工程中较为常用的是Hasofer和Lind提出的不变二阶矩可靠度指标,可采用正交变换法、MonteCarlo法、优化等方法求解β 值。使用优化方法求解Hasofer-Lind可靠度指标,避免了相关变量的独立变换以及求极限状态函数对基本变量的偏导数这两个问题。本文明确了Hasofer-Lind可靠度指标的物理意义,提出了Hasofer-Lind可靠度指标在Fortran语言中的优化求解方法,通过与Excel规划求解器计算结果对比,表明本方法计算结果可靠,多变量情况下可靠度指标能够迅速收敛。该方法直接在基本变量空间求解,与已有的利用Fortran语言编制的边坡稳定程序无缝连接,除了可以用于求解边坡稳定分析中c 和φ 相关问题之外,还可以计算考虑土工参数空间变异情况下的土坡可靠度指标。
英文摘要:
      The non-variable second moment reliability index presented by Hasofer and Lind is commonly used in engineering. Orthogonal transformation method,MonteCarlo method,and optimal method can be employed to solve for the β value in the index. By using the optimal method, the orthogonal transformation for correlation variables and the partial derivatives of the limit state function with respect to the original variables are avoided. EXCEL solver is commonly used for optimization. In this paper,the physical meanings of Hasofer-Lind reliability index was made clear and the optimal method by Fortran Language was presented. By comparing the result from Excel solver,the precision has been verified,and the computation is able to converge promptly under the condition of several variables. The present method can obtain the solution directly in the original variables space, and can be embedded in the existed slope stability program seamlessly. Besides the problem about c and φ correlation, the method also can be used to get the soil slope reliability index considering the spatial variation of soil parameters.
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