城际铁路跨度160 m简支钢桁梁设计及技术创新

设计时速200 km城际铁路采用160 m下承式简支钢桁梁上跨贵广、南广及广茂铁路,对主桥总体布置、主桁构造、桥面系及下部结构进行介绍,利用Midas/Civil建立空间有限元模型,对该简支钢桁梁结构进行静力分析、动力特性计算以及施工方案设计,各项计算结果均满足规范要求。

Design for a 160 m Simply Supported Steel Truss Girder in the Intercity Railway

The intercity railway of design speed at 200 km/h adopts 160 m down-supported simple-supported steel truss girder. The railway across the Guiyang to Guangdong, Nanning to Guangdong and Guangdong to Maoming railways. In order to ensure the safety of the components of the bridge, the overall stiffness is reliable and the construction scheme is reasonable, the main layout of the main bridge, the main raft structure, the bridge deck system and the substructure are introduced in this paper. The finite element model is established by Midas/Civil, and the static analysis, dynamic characteristics calculation and construction of the simple supported steel truss structure are carried out. The design of the scheme and the calculation results meet the requirements of the specification. The key technology of the structural design of the bridge and the design of the construction scheme can provide design reference for the long-span simple-supported steel truss structure.