某特大桥三维有限元施工仿真分析

3D Finite Element Emulation Analysis on Huge Bridge

某预应力特大桥结构采用双薄壁空心墩与大跨度箱梁相结合,结构形式和受力条件都较复杂,桥梁在施工过程中经常发生事故.因此对桥悬臂施工过程进行了三维有限元计算,分析了各个施工阶段的应力状态.结果表明,最终选定的结构布置形式和施工方法是可行的.

The huge pre-stressed bridge adopts the method of combining double thin wall hollow pier and long-span box girder, so that its structure layout and load condition are complex. Engineering experience suggested that bridge accidents mostly occur during construction. Three dimension finite element method is used to calculate the stress state of the cantilever during each construction stage. The results shows that the structure layout and construction method selected at last are feasible.