%0 Journal Article
%T 既有铁路桥梁开行大轴重重载列车适应性研究<br>The adaptability study on the operation of heavy-haul trains on existing railway bridges
%A 卢朝辉
%A 马义飞
%A 余志武
%A 宋力
%A &lt
%A br&gt
%A LU Zhaohui
%A MA Yifei
%A YU Zhiwu
%A SONG Li
%J 铁道科学与工程学报
%D 2016
%X 既有铁路开行大轴重重载列车是我国货运铁路的重要发展方向。但是,既有铁路开行大轴重重载列车,将加剧既有铁路桥梁的疲劳损伤并缩短其使用寿命,因此,开展既有铁路桥梁对大轴重重载列车的适应性研究具有重要意义。首先基于“模拟疲劳荷载法”通过Matlab软件编程计算了21,23,25,27,30和33t轴重列车作用下,既有铁路6~56 m跨径桥梁的荷载谱。然后,基于各跨径桥梁的荷载谱,就大轴重重载列车运行条件下,既有铁路桥梁的静力适应性和疲劳适应性进行分析。最后,以既有铁路8 m低高度钢筋混凝土板梁桥为例,采用国内外具有代表性的钢筋疲劳S-N曲线对其疲劳寿命进行预测,在此基础上,提出了适用于我国既有铁路桥梁疲劳寿命预测的建议公式。研究成果可为我国既有铁路开行大轴重重载列车提供技术支撑。<br>The operation of heavy-haul trains on existing railways becomes the development trend of railway freight transportation in our country. However, the load effect and frequency of the existing railway bridges will be added due to the operation of heavy-haul trains, and therefore, it is significant to conduct adaptability study on the operation of heavy-haul trains on existing railway bridges. In the present paper:Firstly, the load spectrum curves for existing railway bridges with spans ranging from 6 to 56 meters under different train axle loads including 21, 23, 25, 27, 30 and 33t, were obtained by numerical computation using Matlab software; Based on these investigations, the adaptability study including static reserves and fatigue life of the existing railway bridges were conducted; Furthermore, the fatigue life of low-height reinforced concrete bridge with 8m-span was predicted using the existing S-N models of reinforcing steel, and finally, an empirical formula for predicting the fatigue life of the existing railway bridges was suggested with the consideration of engineering practice. The findings of this paper can provide technical support for the operation of heavy-haul trains on existing railway
%K 大轴重列车
%K 既有铁路桥梁
%K 适应性分析
%K 静力设备
%K 疲劳寿命&lt
%K br&gt
%K heavy-haul train
%K existing railway bridges
%K adaptability study
%K static reserves
%K fatigue life
%U http://www.jrse.cn/paper/paperView.aspx?id=paper_311925