中欧标准下接触网支柱荷载计算的差异性分析  

Differential Analysis of Overhead Contact System Pole Load Calculation under Chinese and European Standards

作　　者：李洪生 LI Hongsheng(China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308

出　　处：《铁道工程学报》2023年第10期105-111,共7页Journal of Railway Engineering Society

基　　金：中国铁路设计集团有限公司科技开发课题(2023A0251214)。

摘　　要：研究目的:支柱荷载计算是接触网系统设计的重要组成部分,不同的计算方式、参数取值均会对荷载标准值和设计值产生较大影响。对于境外铁路接触网设计,采用中国标准和欧盟标准进行计算时,取得的计算结果也不相同,所以必须做好两种计算方式差异性分析的基础工作。研究结论:(1)通过中国标准和欧标的列式对比,分析两种标准下接触网荷载计算的相同点和不同点,本文以特定计算条件为基础,分析了两种计算方式和相关参数的差异性;(2)当风圧高度为10 m,风向垂直于线路方向时,对风荷载和风冰荷载两种工况分别计算,其中永久荷载计算公式和计算数值均没有差异,可变荷载中欧标计算的风荷载相对较大,而风冰荷载工况的计算值也大于无冰、最大风工况,所以接触网支柱基础的结构设计将基于风冰荷载工况进行设计;(3)通过相关参数的对比分析,说明了随着参数取值的变化,两类标准框架下荷载计算值的大小也将发生相对性变化;(4)本研究成果有利于国内外接触网设计标准的进一步融合,有利于中国标准接触网体系的进一步完善。Research purposes:Pole load calculation is an important part of the overhead contact system design,and different calculation methods and parameter values have great impacts on the load standards and design values.For the design of overseas railway overhead contact lines,the calculation results obtained by using Chinese standard and EU standard are different,so it is necessary to do the basic work of analyzing the differences between the two calculation methods.Research conclusions:(1)This article analyzes the same and the different of overhead contact lines load calculation under two standards by comparing the Chinese standard and EU standard listed formulae,and the differences of two calculation methods and related parameters are analyzed in the article on the basis of specific calculation conditions.(2)When the wind pressure height is 10 m and the wind direction is blowing vertically to the railway line direction,the wind load and wind-ice load are calculated separately for the two working conditions,in which there is no difference between the permanent load calculation formula and the calculated values,the wind load calculated by the EU standard in the variable load is relatively larger,and the calculated value of the wind-ice load working condition is also greater than the no-ice,maximum wind working condition,so the structural design of the overhead contact system pole foundation will be designed based on the wind-ice load working condition.(3)Through the comparative analysis of the relevant parameters,it is shown that with the change of parameter values,the magnitude of the calculated load values under the two types of standard frameworks will also change relatively.(4)The research results are conducive to the further integration of domestic and foreign overhead contact system design standards,and further improve the Chinese overhead contact system standards.

关 键 词：接触网 荷载计算 标准 差异性 

分 类 号：U225.7[交通运输工程—道路与铁道工程]