Abstract:Slope with broken line slip surface is a common type of landslide

the dynamic response under action of earthquake is very complex. In order to study the dynamic response of slope with broken line slip surface under the action of earthquake

applying time history analysis method

we established the numerical model with ANSYS finite element software. We first analyzed mechanical properties under static behavior

then inputted seismic waves to model

and analyzed the dynamic response under dynamic loading. We got that: stress-transfer occurred in the slope under earthquake action; rock bed dislocation occurred on both sides of the joint

since the existence of lock-fixed section，the dislocation of lower part was larger than upper part. The studied slope as a latecomer-landslide

although earthquake action didn’t damage the slope

the cumulative effect of the earthquake reduced the stability of slope.