Influence law of ground motion parameters on soil slope seismic response

Six groups of strong ground motion records with different characteristic parameters were selected as seismic input, a two-dimensional slope model with homogeneous soil was established based on the finite element numerical simulation method, and then the acceleration and displacement responses of the slope model were calculated and analyzed. Finally the influence degree and laws of the PGA, frequency spectrum and duration on the slope responses in earthquakes were revealed. The results showed that the PGA, characteristic period and duration all had an significant effect on slope seismic response. It was also indicated that the displacement of the slope foot and shoulder evidently increased with increase of the PGA, characteristic period and duration of earthquakes, and the amplification coefficients of PGA along the slope free surface also increased with increase of characteristic period while decreased with increase of the PGA. The result can provide reference for the design and prevention of slope stability under earthquake effect.