钢系杆拱桥结构体系设计参数研究

Study of Design Parameters of Structural System of Steel Tied Arch Bridge

系杆拱桥具有跨越能力大、建筑高度小等优点,在已建高速铁路的国家都得到了应用,但我国至今还没有在高速铁路上实际建成大跨度钢系杆拱桥,设计中还有许多问题需要研究。以大跨度钢系杆拱桥为工程背景,利用有限元程序分析了矢跨比、系梁和拱肋的刚度比、拱肋横向连接系的设置、吊杆布置形式、桥面系对结构力学特性的影响,探讨了上述参数相对较优的方案,供设计人员参考。

The tied arch bridge has advantages of great spanning capacity and low architectural height and has been applied in the countries where high-speed railways were built. However, on the high-speed railways in China, the long span steel tied arch bridges have not been actually built so far and there still exit problems remaining to be researched in the design. In this paper, backgrounded by a long span steel tied arch bridge, the finite element program is used to analyze the influences of the design parameters, such as the rise-to-span ratio, ratio of rigidity of tied beam and arch rib, arrangement of lateral bracing system for arch ribs, suspender arrangement and floor system, on the mechanical properties of the structure of the tied arch bridge and at the same time, some of the relatively good proposals for the said parameters are studied in order to provide reference for the designers of the type of the bridges.