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Research on calculation method of fuzzy-random risk for instability of gravity dam foundation
Author(s): PENG Hui-hui, WANG Gang, MA Zhen-yue
Pages: 1-
6,9
Year: 2011
Issue:
4
Journal: Dam & Safety
Abstract: 基于重力坝坝基抗滑稳定各影响因素的随机性、模糊性以及失稳准则的模糊性,研究了坝基失稳模糊风险数学模型的求解方法,建立了基于安全系数的模糊随机极限状态方程,对设计参数的模糊采用计算简便的α水平截集法,而对失效准则的模糊采用降半梯形隶属函数.工程实例计算表明:此方法比参数与失效准则均采用α水平截集法时得到的模糊风险率区间值更趋合理,模糊风险分析计算得到的坝体安全结论也与现行规范的确定性方法一致.
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