Abstract:To analyze the dynamic response at the surface of a basin site under seismic waves with different bedrock inclinations, a 2D layered basin with a depth of 100 m and width of 2 km was selected. Under the input of a Dirac pulse with a duration of 0.25 s, the seismic responses of the basin subjected to vertical incident P wave and SV wave were analyzed with bedrock inclinations of 10°, 20°, 30°, and 40°. The result shows that the incident wave had a wave-type transformation at the inclined bedrock; meanwhile, surface waves were generated and were concentrated at the center area of the basin. With increase in the bedrock inclinations at the valley sides, the dominant frequency at the center of the earth surface tended to decrease. The results obtained from the present analysis can provide a reference to research on this topic.