A general SPH framework for earthquake-induced landslide simulation

抄録

Earthquake-induced landslides are natural disasters that can pose significant threats to human lives and infrastructure. To assess the risk and the extent of damages, it is essential to develop a robust computing method capable of predicting the large deformation and failure process of geomaterials caused by seismic loads. Over the years, several numerical methods have been developed for this purpose. Among these methods, the smoothed particle hydrodynamics (SPH) method has emerged as a powerful approach for simulating the large deformation and post-failure behaviour of geotechnical problems. However, one of its limitations is the lack of suitable boundary conditions for analysing seismic responses in unbounded boundary domains or infinite computational domains. This study addresses this knowledge gap by presenting a general SPH framework for the large deformation seismic response analysis of unbounded slopes. It will be shown in this paper that the proposed SPH framework can accurately reproduce wave propagation and dissipation, in particular for a long duration. The proposed SPH framework is then employed to simulate an earthquake-induced retrogressive landslide in sensitive clay. The simulation results reveal several aspects of the slope failure under seismic loading conditions, and demonstrate that SPH is a suitable tool for the risk assessments of landslides and other geohazards triggered by earthquakes.