Seismic performance evaluation of high CFRD slopes subjected to near-fault ground motions based on generalized probability density evolution method

摘要: Abstract This research mainly addresses evaluating the seismic reliability and analyzing random dynamic response of high concrete-faced rockfill dam (CFRD) slopes suffering from near-fault earthquakes by establishing a novel method generating representative acceleration time histories coupled with recently proposed generalized probability density evolution (GPDEM). A evaluation is performed after two groups ground motions, pulse-like non-pulse-like earthquakes, coupling series statistical stochastic parameters spectral representation-random function method. 242-m-high CFRD selected as an example for finite element analysis, second-order values (including mean standard deviation) information three indices safety factor, cumulative factor ≤ 1.0 (Fs ≤ 1.0) maximum slippage are determined, respectively. The effective non-stationary will be adopted to determine earthquake loading slopes. probabilistic results demonstrate that characteristics make great difference slope stability well pulse properties. combined GPDEM can evaluate performance effectively perspective randomness, failure obtained directly.