横竖向地震动对滑体运动特性的影响

Influence of Horizontal and Vertical Ground Motion on the Movement Characteristics of Landslides

采用非连续变形分析(DDA)方法,模拟边坡在横竖向地震动作用下的灾变过程,得出以下结论:(1)通过DDA方法可以有效模拟地震边坡灾变过程,获得的滑坡状态、堆积体形状、滑动速度和距离等重要信息对边坡支护设计及治理具有重大意义;(2)RSN879地震记录中,在竖向地震动作用下边坡保持稳定,无明显失稳现象;横向地震动作用下边坡失稳现象明显,其破坏程度远大于双向地震动和竖向地震动。

This paper used the discontinuous deformation analysis(DDA)method to simulate the disaster process of slopes under earthquakes,and drew the following conclusions:(1)The earthquake slope failure processes could be effectively simulated by the DDA method,and the important information obtained,such as landslide state,mound shape,sliding speed and distance,was of great significance for slope support design and management;(2)In the RSN879 seismic record,the slope remains stable under vertical ground motion without obvious instability,while the slope was significantly unstable under horizontal ground motion,and the degree of damage was much greater than that of two-way ground motion and vertical ground motion.