基于隐式接触算法的曲线桥地震碰撞效应研究

Study on seismic collision of curved bridge with implicit contact algorithm

针对地震作用下的曲线连续梁桥的碰撞现象,以一座公路立交桥为背景,建立考虑梁端与桥台碰撞的三维有限元模型,采用Ansys隐式接触算法进行数值模拟分析,运用非线性时程积分方法研究了曲线连续梁桥伸缩缝处碰撞发生的规律,探讨了梁端碰撞发生时各个桥墩位置处梁墩相对位移及墩底内力的变化规律,以及影响梁端碰撞的因素。

In view of collision phenomenon of continuous curved bridge under earthquake,using a highway overpass,a three-dimensional finite element model is established with the collision between the beam end and the abutments.The collision law is researched by Ansys implicit contact algorithm and the nonlinear time-history analysis method.Relative displacement of the beam and piers and change rules of internal forces of piers at the bottom is explored.