Abstract
The seismic stability of earth slopes attracts more attentions. In this study, the two-dimensional dynamic analyses of slope stability subjected to earthquakes are conducted by DEM. In order to prevent boundary effect in dynamic analysis, the quiet boundary is applied in the model, which can fully absorb seismic waves. The progressive failures are clearly observed. The obtained slip surface is in good agreement with that determined by pseudo-static method. In order to calculate the factor of safety using DEM, the strength reduction technique is adopted. A numerical example regarding the instability of the soil slope induced by earthquake shows the validation of the strength reduction technique. In the procedure, several failure criteria are proposed to determine the global instability of the slope. The factor of safety is defined and then compared with the results from other methods. It demonstrates that the discrete element method with strength reduction technique is a promising and feasible method for assess the seismic slope stability.
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