市政技术2025，Vol.43Issue(11)：1-9,17,10.DOI:10.19922/j.1009-7767.2025.11.001
基于SPH-FEM耦合的地震诱发滑坡启滑过程及其堆积形态模拟研究
Simulation of Earthquake-induced Landslide Initiation Process and Accumulation Morphology Based on SPH-FEM Coupling
摘要
Abstract
Historical earthquake damage have shown that seismic hazards and earthquake-triggered landslide disas-ters pose serious threats to slope safety,especially the earthquake-induced landslide in high-mountain canyon en-gineering 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 large-deformation process of earthquake-induced slope sliding.The study investigates the displacement time history,ve-locity 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 varia-tions and the more pronounced displacement growth trends;As the residual cohesion strength increases,the accu-mulation range of the landslide gradually decreases with the morphology shifting from dispersed to concentrated.关键词
地震诱发滑坡/SPH-FEM耦合/全过程模拟/堆积形态Key words
earthquake-induced landslide/smoothed particle hydrodynamics(SPH)-finite element method(FEM)coupling/the whole-process simulation/accumulation morphology分类
天文与地球科学引用本文复制引用
张卜,杜勇辉,赵密,杜修力..基于SPH-FEM耦合的地震诱发滑坡启滑过程及其堆积形态模拟研究[J].市政技术,2025,43(11):1-9,17,10.基金项目
"十四五"国家重点研发计划项目(2022YFC4300) （2022YFC4300）
国家资助博士后计划(GZB20240050) （GZB20240050）
