The Jiguanshanliangzi high-steep slope is taken as a typical case study in Wudongde hydropower station near Chin-sha River. Based on seismic monitoring of the slope surface

firstly

after inputting horizontal and vertical Ricker wavelets at the elastic slope model bottom

it is found that the low modulus of rock mass materials at the slope top is easily amplified after the excitation of the horizontal Rick wavelet. The surface convex topography is easy to produce resonance amplification when the vertical Rick wavelet is excited. The predominant frequencies of the top surface are consistent with the measured values. Secondly

comparative analysis of the slope stability and dynamic response characteristics are performed when inputting the real Wenchuan and Ludian earthquake acceleration records. It can be found that the slope may have three different potential slip surfaces at different locations under the static condition. However

when inputting the above two seismic waves

the deformation and failure occur only at the slope top position. When inputting the Wenchuan seismic wave

the shear strain increment of the top slip surface is significantly greater than that when inputting Ludian seismic wave. The tension failure zone is observed at the slip surface and the horizontal and vertical residual deformation is not convergence. The slope is at the state of instability after the earthquake. When inputting the Ludian seismic wave

there is no tensile failure zone observed at the slip surface and the residual deformation is convergence

which means that the slope is stable after the earthquake. The slope of horizontal and vertical acceleration at the slope top surface appears significantly enlargement due to a low modulus material

showing obvious site effect. In addition

the surface acceleration is generally greater than the corresponding values within the slope

especially at the location of convex topography. The amplification factor of horizontal acceleration at the slope top after inputting the Wenchuan seismic wave is greater than that after inputting the Ludian seismic wave

but the vertical acceleration amplification factors are essentially the same.