Abstract:Soil-pile dynamic interaction is an important issue in the seismic response analysis of pile foundation bridges. For a bridge with the low-pile base slab foundation, the base slab is buried below the earth surface, and there is also dynamic interaction between soil and base slab. At present, the influence of soil-base slab dynamic interaction is generally not considered in seismic response analysis, and is rarely studied in the literature. Therefore, based on the p-y curve method, a soil-structure integrated pile foundation single-pier model is established by using OpenSees finite element analytical procedure. 40 actual rock site seismograms are selected as input to carry out the seismic response analysis of pile-supported bridge considering the soil-base slab dynamic interaction. The results show that the basic period of structure will decrease after considering the soil-base slab dynamic interaction, and the curvature of pier-bottom section will obviously increase and the curvature of pile-head section will greatly decrease, but decrease of displacement at the pier top can be neglected.
