椭圆形钢桁架天桥设计

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。本文介绍了天桥上部结构的设计，根据钢桁架所受外荷载，对其进行了空间计算，对天桥进行了静力、动力分析，讨论了封闭椭圆形桁架天桥的支座布置方法。

Design of Oval Steel Truss Overpass

The pedestrian bridge at an intersection of the Gu- angzhou-Yunfu highway in the town of Dali has an oval sh- aped steel truss main structure. The long axis of center line of the bridge is of 95.3 m, and its short axis is of 79.2 M. This paper introduces the design of the upper structure of the bridge, carries out the static, dynamic analysis of the bridge, discussi- ng the closed bearing arrangement method of elipse truss br- idge.