地震载荷下斜坡稳定性数值模拟分析

Numerical analysis on slope stability under seismic load

地震载荷是影响复杂结构斜坡塌滑的一个重要因素。本文以汶川震区一边坡为实例,利用有限差分法FLAC-3D对地震动力下斜坡进行了数值模拟。并且在用FLAC-3D进行斜坡动力分析时探讨了边界条件设置、动力时程的合成以及输入和转化。从位移场与速度场进行了详细的动力分析,获得该斜坡地震载荷下位移场、速度场的变化规律,指出山体斜坡在非连续介质状态下软弱面区域位移和速度最大,为后续进行复杂的山体破坏力学研究提供理论依据。

The seismic load is an important factor in the collapse about the complex structure of the slippery slope.Based on an instance of Wenchuan Earthquake Area Slope,this paper uses the finite difference method FLAC-3D to simulate the effects of the slope under seismic load.In the slope with the FLAC-3D dynamic analysis,the problems about boundary conditions,and the synthesis,input,conversion of the dynamic time history are discussed.Through in-depth dynamical analysis of displacement and velocity,access to the variation of the displacement field and the velocity field under seismic load,the paper shows the displacement and velocity of the mountain slopes in the weak non-continuous medium surface area are the largest,and provides a theoretical basis for the subsequent destruction of the complex mechanics of the mountain.