【摘要】 针对高堆石坝非线性强度指标坝坡稳定可靠度分析方法与参数敏感性等关键问题,提出了数值微分技术与FORM相结合的新方法,解决了功能函数为隐函数的可靠度计算问题,并深入研究了非线性强度指标φ0、Δφ对坝坡稳定的影响程度。多方案分析表明:该方法计算方便,精度高;φ0、Δφ的概型、均值、变异系数对β的影响均以前者更为显著。更多还原

【Abstract】 To solve the key problems about the reliability analysis method of high rockfill dam slope nonlinear strength stability and parameter’s sensitivity,a new reliability method for dam slope nonlinear strength stability by combining numerical derivative technique and FORM iss presented in this paper.The method has settled the reliability calculation problem of implicit performance function.In addition the influences of nonlinear strength parameters φ0 and Δφ on slope stability were researched.Multiple schemes analysis show that the method is convenient and accurate,and the distribution and mean value and variation coefficient of φ0 affect the reliability index β more significantly than Δφ.更多还原