关键词: 连续梁桥, 桩-土相互作用, 非线性分析, 地震响应, 场地类型

Abstract: Taking a high-speed railway three-span continuous beam bridge as an example, a three-dimensional finite element model of the bridge-soil-pile system is established using ABAQUS finite element software. Nonlinear spring elements combined with damping elements are used to simulate the pile-soil interaction, and nonlinear dynamic time-history analysis is conducted on the finite element model. The effects of three seismic waves and three types of site soil conditions on the structural seismic response are compared. Compared with the calculation model without considering pile-soil interaction, the research results indicate that the influence of pile-soil interaction cannot be ignored, and considering the pile-soil interaction will significantly increase the displacement and acceleration of the pier top, and pier base shear force. Different seismic waves and site soil conditions also have a large impact on the analysis results; the softer the soil conditions of the site, the more significant the impact of pile-soil interaction on the seismic response of the bridge.

Key words: continuous beam bridge, pile-soil interaction, nonlinear analysis, seismic response, site type