铁道标准设计2017，Vol.61Issue(1)：21-25,5.DOI:10.13238/j.issn.1004-2954.2017.01.005
大跨连续刚构桥梁体及轨道温度分布试验及其影响研究
Temperature Distribution Test of Large-span Continuous Rigid Frame Bridge and Track and Its Effect
摘要
Abstract
To clarify the temperature distribution of the beam and track on large-span continuous rigid frame bridge and its effect on the mechanical behavior of CWR on bridge, a study is conducted to identify the temperature distribution of box-girder and track structure based on a large double-track railway continuous rigid frame bridge. The results show that, according to the measured data, the maximum temperature of the rail is higher than that of the air, and the minimum temperature is relatively low. When the air temperature is low, even though the minimum rail temperature and the minimum air temperature are not exactly the same, the difference between them is very small, and the same is true for the maximum rail temperature and the maximum air temperature. But when the temperature is relatively high, the maximum rail temperature is significantly higher than the highest air temperature; the longitudinal temperature distribution is not quite different and the temperature difference appears mainly in the vertical and horizontal directions. On the box girder, the temperature gradually increases from top to bottom along the direction of the vertical beam;likewise, difference exists along the transverse, but the difference is small. The rail longitudinal force is less affected by the beam vertical temperature gradient, but it may have some effect on the line vertical profile irregularity largely in the range of long waves, and long-wave irregularity overrun may occur when the temperature gradient is large.关键词
高墩大跨桥/连续刚构桥/温度分布/无缝线路/试验研究Key words
Tall pier and long span bridge/Continuous rigid frame bridge/Temperature gradient/CWR/Experimental study分类
交通工程引用本文复制引用
刘成,刘淦中,陈漫,王平..大跨连续刚构桥梁体及轨道温度分布试验及其影响研究[J].铁道标准设计,2017,61(1):21-25,5.基金项目
国家自然科学基金委“高速铁路基础研究联合基金”重点支持项目(U1334203&U1234201) （U1334203&U1234201）
