Dynamic Reliability Analysis of Layered Slope Considering Soil Spatial Variability Subjected to Mainshock–Aftershock Sequence

The slope instability brought on by earthquakes frequently results in significant property damage and casualties. At present, the research displacement response of a under earthquake has mainly emphasized action mainshock, without accounting for impact an aftershock, spatial variability material parameters is often neglected. fully accounted this paper, dynamic reliability permanent (DP) produced mainshock–aftershock sequence (MAS) studied. A analysis method proposed based Newmark generalized probability density evolution (GPDEM) to quantify effect materials reliability. Firstly, parameter random field generated spectral representation method, randomly are assigned finite element model (FEM). In addition, simulation MAS considering correlation between aftershock mainshock adopted Copula function generate MAS. Then, DP slopes caused calculated method. impacts coefficient variation (COV) analyzed means mean values. Finally, COV explained from probabilistic point view GPDEM. revealed that with increase COV, shows trend increasing gradually. more sensitive friction angle (COVF). induced larger compared single PGA DP.