双线铁路钢管混凝土系杆拱桥设计

Design of a Bow String Arch Bridge of Steel Pipe-encased Concrete on a Double Railway Track

本文首先介绍了某铁路96m系杆拱桥的主要构造尺寸,通过采用数值分析手段对钢管混凝土拱桥的结构进行了分析。分析结果表明,钢管系杆拱桥具有结构高度小、竖向刚度大和良好的动力特性,因而在实际设计中可以大力推广。

This article firstly introduces the main structure sizes of a 96m steel pipe-encased concrete bow string arch bridge. Then the author adopted a numerical method to analyze the deformation and stress of the bridge. The analysis result shows that the bridge takes the advantages of small height in structure, lager vertical stiffness, and better dynamic characteristics. So this type of steel pipe-encased concrete bow string arch bridge can be used widely in the future.