铁路列车活载图式  

Live Load Representative Figure in Railway Design

作　　者：辛学忠[1] 张玉玲[2] 戴福忠[2] 潘际炎[2] 

机构地区：[1]北京交通大学土木建筑学院,北京100044 [2]铁道科学研究院铁道建筑研究所,北京100081

出　　处：《中国铁道科学》2006年第2期31-36,共6页China Railway Science

基　　金：铁道部科技研究开发计划项目(2004G027)

摘　　要：列车活载图式是设计各类铁路工程结构的主要依据。随着铁路牵引动力的发展、运输组织的变化和客运快速化、货运重载化,现行桥梁规范使用的中-活载标准已难以反映列车活载的实际情况和发展,需要修改。根据使全路设计活载图式一致,遵循客运、货运铁路按各自特点作不同规定的原则,提出由基本设计图式和长大重车检算图式组成的中-活载(2005)图式。其基本图式为中间4个集中荷载,两边无限长均布荷载。活载标准分为城际轨道交通、客运专线、客货共线和货运专线四级。增加的长大重车检算图式对有通过长大车要求的桥梁在中跨度范围得到加强。在增加投资较少的前提下,使桥梁安全储备综合指标更加均衡和合理,改善实际结构性能,提高结构的安全度。中-活载(2005)图式和相关规定满足铁路运输当前和远期发展的需要,也满足大型货物车辆运行的需要。Train representative figure is the dominating foundation to design the railway engineering structures. With the development of locomotive tractive power, the change of traffic organization, the trend of speed-increase for passenger traffic and heavy haul for freight traffic, it is difficult for China live-load figure in the current railway bridge design code to represent the real condition of train live load now and the railway development in the future. Revision work is necessary. Based on the target to unify the design figure shape in the whole railway, and allow to have different prescription in values according to different character of passenger train and freight train, this paper presents the China-live-load （2005） figure composed of basic figure and super-long-heavy freight checking figure. The basic figure has four concentrated load in the middle and evenly distributed load with infinite length on both sides. The live load criterion is classified into four： intercity rail transportation, special passenger transportation, passenger-freight mixed transportation and special freight transportation. The added super-long-heavy freight checking figure makes it strengthened for middle span bridges in the railway lines that require passing the super-long-heavy freight train. Under the condition of increasing limited investment, the suggested train figure makes the synthesis criterion of bridge safe storage more proportional and reasonable. It improves the performance of real structure, and heightens the structural safety. The China-live-load （2005） figure and its provision can meet both current and future needs of development in railway transportation. It can also meet the needs of super-long-heavy freight train operation.

关 键 词：铁路桥梁 设计 标准 活载图式 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]