环形钢桁架天桥总体设计简介

Brief Introduction of Master Design of Steel Ring Truss Overpass

大沥广云交叉口人行天桥,主体结构为椭圆形钢桁架,天桥中心线长轴95.3 m,短轴79.2 m。介绍了天桥设计的总体思路,讨论了天桥方案确定所需要考虑的主要因素,分析了天桥设计过程中的一些关键性问题。最后对钢桁架所受外荷载进行了空间计算,对天桥进行了静力、动力分析。

The main structure of a pedestrian overpass at the intersection of Dali and Guangyun is a steel oval truss. The long axis of the overpass centerline is 95.3 m and its short axis is 79.2 m. The article introduces the overall ideas of the overpass design, discusses the main factors required to consider for the determination of overpass scheme, analyzes some key issues in the design of overpass, and finally introduces the space calculation of the external load subjected to the steel truss, and the static and dynamic analysis of the overpass.