北川河钢管混凝土刚架系杆拱的结构分析

The structural analysis of Beichuan river concrete-filled steel tubular arch bridge with tied frame

以青海省西宁市北川河桥为例 ,建立钢管混凝土刚架系杆拱桥空间有限元模型 ,对主拱肋施工阶段进行静力分析和稳定分析 ;对全桥使用阶段进行静力分析、整体稳定分析和动力特性分析 ;并对系杆施加预应力的大小等若干问题进行讨论 。

In this paper the Beichuan river bridge in Qinghai province Xining city is used for example, and the space finite element model of the concrete-filled steel tubular arch bridge with tied frame is established, then the static structure analysis and steady analysis for main arch rib are carried out in construction stage, and static structure analysis and overall steady analysis and power property analysis are also carried out as whole used stage. Some problems such as the tied is exerted the prestressing force etc. are discussed. The research results are helpful for this knowledge of mechanics property of these arch bridges.