大跨径连续箱梁悬臂施工有限元仿真分析

Finite Element Simulation Analysis of Force Conditions of Large Span Continuous Box Girder Bridge with Cantilever Construction

采用Midas/Civil 2006将全桥结构简化为三维空间模型结构,可实现桥梁从施工到成桥全过程的受力仿真分析.结合跨越既有线(70 m+125 m+70 m)连续箱梁桥,介绍对其仿真分析的方法.计算结果表明有限元分析方法能精确地模拟结构实际受力全过程,为连续梁桥的施工及测控提供有参考依据和有效的验证手段.

By means of Midas/Civil2006 software, the whole bridge can be simplified into three-dimensional model, the simulation analysis of the whole process of bridge froce conditions from construction state to completion state can be performed. The large span continuous box girder with the span of 70m ＋ 1250 ＋ 70m which crosses the existing railroad was analyzed. The results of calculation show that the method can well fulfill precise simulation of the whole process of the actual force conditions of the structure of the bridge, therefore contributing an effective means of verifying construction and supplying technical data for the similar large span continuous box girder.