大同市平城街西延双向非对称独塔斜拉桥设计

Design of Double-way Asymmetric Single-pylon Cable-stayed Bridge in West Extension of Pingcheng Street in Datong City

背景工程为山西省大同市平城街西延主线主桥,该桥跨既有铁路编组站及多股重要铁路线。重点介绍主线特大桥结构设计与计算,采用双向非对称独塔中央索面斜拉桥,跨径布置为(41+50+163)m,塔柱及主梁均为钢混凝土混合结构,为减少对铁路的影响,采用转体施工。经总体静力、局部及动力计算分析,结果表明,该桥结构设计合理,施工安全可靠,可为同类桥梁的设计与施工提供参考和借鉴。

The background project is the main bridge in the main west extension of Pingcheng Street in Datong City, Shanxi Province. This bridge spans the existing railway marshalling yard and several important railway lines. The structural design and calculation of the over-large bridge are specially introduced. It is a double-way asymmetric single-pylon central-plane cable-stayed bridge. Its span layout is 41 m+50 m+163 m, and its pylon column and main beam are the steel concrete composite structure. In order to reduce the influence on the railway, the rotation construction is adopted. The results of overall static, local and dynamic computational analysis show that the structure design of the bridge is reasonable,and its construction is safe and reliable, which can provide reference for the design and construction of similar bridges.