Seismic Response of Gravity Dam under Oblique Incidence of Seismic Waves

The selection of proper seismic input is essential for seismic response analysis of the gravity dam structures. For the near-field earthquakes, the direction of seismic waves is not always considered as vertical. The non-uniform motion produced by oblique incidence can cause significant influence to the structure. In this study, the obliquely incident method is applied in the finite element model of a typical section of a gravity dam located in southwestern China. The seismic response under obliquely incident of plane P wave and plane SV with different incident angles and tilt directions are discussed. The results show that the oblique incidence has an obvious effect on the seismic response of the gravity dam, and the inconsistence produced by oblique incidence cannot be neglected.