【摘要】 历史震害经验表明，地震灾害和地震链生滑坡灾害严重威胁坡体安全，尤其是高山峡谷工程区地震诱发滑坡问题日益突出。因此，为模拟地震诱发滑坡启动了滑动的堆积全过程，提出了一种光滑粒子流体动力学方法（SPH）与有限元方法（FEM）耦合的数值模拟方法，建立了静动力分析步骤；结合自编残余黏聚强度随等效塑性应变软化用户子程序，实现了地震诱发坡体滑动大变形过程模拟。开展了滑体不同衰减黏聚强度参数下、滑坡下的监测点位移时程、速度时程和堆积形态研究。研究结果表明，滑坡启动滑动堆积全过程可划分为初期缓慢位移阶段、中期加速位移阶段、后期减速至零阶段；不同残余黏聚强度滑坡中残余黏聚强度越低、滑坡体位移值越大、滑坡体速度峰值越高，变化就越剧烈，且位移增长趋势越明显；随着残余黏聚强度的增加，滑坡堆积范围逐渐减小，形态由分散趋向集中。更多还原

【Abstract】 Historical earthquake damage have shown that seismic hazards and earthquake-triggered landslide disasters pose serious threats to slope safety,especially the earthquake-induced landslide in high-mountain canyon engineering areas becoming increasingly prominent. In order to simulate the entire sliding accumulation process of earthquake-induced landslide,an coupled numerical simulation method is proposed combining the smoothed particle hydrodynamics(SPH)with finite element method(FEM). The static-dynamic analysis procedure is established;A user subroutine for cohesion strength softening with equivalent plastic strain is developed to simulate the largedeformation process of earthquake-induced slope sliding. The study investigates the displacement time history,velocity time history,and deposition morphology of the monitoring points under different attenuated cohesion strength parameters and landslides. The results indicate that the entire process of landslide-caused sliding accumalation can be divided into several stages of the initial slow displacement stage,the intermediate accelerated displacement stage,the later rapid sliding and deceleration stage;Among landslides with different residual cohesion strengths,the lower residual cohesion,the greater the displacement,the higher the peak velocity,the more intense the variations and the more pronounced displacement growth trends;As the residual cohesion strength increases,the accumulation range of the landslide gradually decreases with the morphology shifting from dispersed to concentrated.更多还原