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本文采用快速收敛的改进的蒙特卡罗方法 ,计算了 2 5 2个标准设计桥台的抗滑稳定可靠指标 ,基本得到了现行标准设计桥台的可靠度水平。经检算 ,所计算混凝土台身及基础桥台的可靠指标平均值 ,有水时为 4.0 41、无水时 3.745 ;变异系数为 :有水时 0 .1 4 2、无水时 0 .1 5 4。所计算片石台身及基础桥台的可靠指标平均值为 :有水时 4.1 38、无水时 3.883;变异系数为 :有水时 0 .1 2 6、无水时 0 .1 5 2。论文还分析了主要随机变量对桥台抗滑稳定可靠指标的影响
In this paper, an improved Monte Carlo method with fast convergence was used to calculate the reliability index of anti-sliding for 2592 standard abutments. The reliability of abutments designed by current standards was basically obtained. After calculation, the calculated average values of reliable indexes of concrete platform and abutment are 4.041 in water and 3.745 in absence of water; the coefficients of variation are: 0.142 when water is present and 0.11 5 4. The calculated average reliability index of the stone tablet base and the abutment is 4.1 38 with water and 3.883 when waterless. The coefficient of variation is: 0.01 12 when there is water, and 0.152 when there is no water. The paper also analyzes the main random variables on the stability and reliability of abutment anti-skid indicators