【摘要】 提出了一种对重力坝进行损伤概率演化过程分析的方法.首先,使用虚拟激励法和Mazars损伤模型分析了初始迭代过程中,在坝体在确定性静力荷载和随机的地震荷载激励下的重力坝损伤因子期望值与方差的计算;然后基于摄动法分析了在其余迭代过程中,重力坝损伤因子的概率密度演化过程.最后,给出了实例分析,并分析了坝体的损伤分布情况以及本文方法的收敛性与稳定性.更多还原

【Abstract】 The research objective is to design and construct an improved method for damage reliability analysis of concrete gravity dam.Firstly,pseudo excitation method and Mazar damage model was used to analyze how to calculate damage expected value and variance excited by random earthquake loading and deterministic static load in the initial iterative step.Moreover,based on perturbation theory,probability density evolution process was analyzed in other iterative steps.Finally,a test example was given to verify and analyze the convergence and stability of this method.更多还原