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-  2016 

响应面法与蒙特卡洛法边坡可靠性评价方法对比研究 Comparative study of methodologies between response surface methods and Monte Carlo methods in slope reliability analysis

Keywords: 极限平衡法,响应面法,可靠性分析,一次可靠度法,蒙特卡洛法

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Abstract:

考虑影响边坡稳定性的主要因素强度参数c、φ的不确定性,以蒙特卡洛法计算结果作为可靠性分析的基准解,在极限平衡法理论框架下开展不同可靠性评价方法之间的对比研究.采用c、φ为基本随机变量建立二次多项式响应面,以重构功能函数,并结合一次可靠度法和蒙特卡洛法进行边坡可靠性分析.通过对均质边坡的圆弧滑动破坏、非均质边坡的非圆弧滑动破坏、三峡库区谭家坪滑坡破坏这3个案例的可靠性分析结果对比得出:1)二次多项式响应面法原理简单,对于隐式功能函数,有较好的计算精度和求解效率,适用于可靠性分析的近似计算,特别是在参数服从正态分布的情况下,能够达到很高的精度;2)求解响应面时应优先采用Spencer法、MorgensternPrice法,对圆弧滑动面边坡,也可以选用简化Bishop法

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