铁路曲线上两片式简支梁活载偏载系数的探讨

Discussion on Eccentric Coefficient of Live Load on Simply Supported Beams on Railway Curve

在曲线直梁空间结构分析的基础上,以常用的16m、20m、24m、32m标准设计预应力混凝土梁为例,分析了列车速度、桥上曲线半径、梁在曲线上的布置方式和桥梁跨度等因素对活载偏载系数的影响。并与现行计算方法进行了比较。

Based on the three-dimensional structure analysis of straight beams on curve,the standard prestressed concrete beams with 16m,20m,24m,32m spans were taken as examples to analyze the influences on the eccentric coefficient of live load by four factors,i.e. the train velocity,the curve radius,the beams arrangement and the bridge span.The eccentric coefficients of live loads based on the existing calculating method which does not take into account the coupling effect of diaphragm and the function of torsion were compared.In the end of this paper,some practical conclusions are obtained.