超大跨度铁路桥梁列车加载长度研究

加载长度对千米级超大跨度桥梁截面尺寸及造价投资起重要作用,需对主跨或主桥联长大于1 km以上的桥梁列车加载长度分析。通过研究,拟找到中-活载及ZK荷载等不同荷载形式下超大跨度桥梁荷载合理加载模式。研究结论:城际铁路及客运专线可按照450 m加载长度加载,普通客货共线铁路及货运专线加载长度根据本线的货车编组情况,可按所设计到发线有效长度作为超大跨度桥梁加载长度;对于主桥联长小于3 km的桥梁,全桥范围内可仅采用1个加载长度加载。

Research on Train loading Length on Super-long Span Railway Bridge

The loading length on super-long span railway bridge plays an important role in determining the cross section and cost of super-long span bridges and it is necessary to analyze the train loading length for bridges of over 1km long. The research aims to find out a suitable loading mode for super-long span bridges under medium-live load and ZK load. The research concludes that the Intercity and passenger dedicated railway lines may use 450 meters loading length. The loading length for railway lines of mixed passenger and freight and freight dedicated railway lines may be determined based on the formation of the freight train,and the effective length of railway station may be taken as the super-long bridge's loading length. For bridges with the main bridge less than 3km,only one loading length is added.