摘要
在广义随机空间中直接建立验算点的迭代公式,可以方便地解决含相关随机变量的结构可靠度计算问题。在广义随机空间中推导了一种收敛性较好的验算点迭代公式,并应用于边坡稳定的可靠度分析。针对卡基娃混凝土面板堆石坝地震工况坝坡稳定的可靠度分析表明:(1)由于安全系数法采用的输入参数为确定值,故不能考虑参数随机波动的影响。可靠度分析能够反映参数随机性的影响,这对于深入评估工程安全与抗风险能力是有益的。(2)通过引入条件概率方法考虑地震和坝坡失稳同时发生的概率得到的结构可靠指标将提高,而提高的幅度与地震发生概率的大小有关。(3)堆石非线性强度指标具有正相关性,考虑强度指标的相关性将提高边坡稳定的可靠度。
Structure reliability calculation problem which contains relevant random variables can be solved conveniently by establishing iterative formula of check point in generalized random space directly. A kind of iterative formula of check point with better convergence is derived in generalized random space; and it is applied to reliability analysis of slope stability. According to the reliability analysis of Kajiwa concrete face rockfill dam slope stability under seismic conditions, it shows that： （1） The input parameters used in safety coefficient method are determined values, so that the random fluctuation influence of parameters can not be considered in calculation. Reliability analysis can reflect the influence of randomness of parameters; it is beneficial to evaluating engineering safety and risk resistance capacity. （2）The reliability index of structure will increase by considering the earthquake and the dam slope instability probability occurring simultaneously, and the increased range is related to the probability of earthquake. （3）Nonlinear strength index of rockfill has positive correlation; the reliability of slope stability will increase when the correlation of strength index is considered.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2013年第6期1753-1759,1785,共8页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.51109151)
中央高校基本科研业务费资助项目
关键词
边坡稳定
可靠度
随机变量
相关
slope stability
reliability
random variable
correlation
