华中科技大学学报（自然科学版）Issue(7)：1-5,5.DOI:10.13245/j.hust.150701
寒冷季节桥上无砟轨道横竖向温度梯度研究
Study on horizontal and vertical temperature gradient of ballastless track on bridge in cold season
摘要
Abstract
By means of holding a continuous observation of CRTS Ⅱ by using temperature sensors on curve line ,the time‐dependent rules of temperature changing and distribution in the track structure with superelevation could be found out .The analysis results prove that :the changing of the tempera‐ture in the track structure is on a 24 h cycle .T he temperature changing value becomes small and the time of maximum temperature comes late with the increase of distance to surface .Fitting curve of ver‐tical temperature gradient in longitudinally connected ballastless track on curve line can be exponential curve ,and the curve sharp is similar to the provisions about the vertical temperature gradient of the code for design of bridge and culvert in China .T he horizontal temperature gradient includes the track slab and support layer ,temperature gradient of track slab can be fitted by using quadratic function , and temperature gradient of support layer can be fitted by using piecewise linear function .关键词
铁路桥梁/轨道工程/无砟轨道/温度梯度/试验研究Key words
railway bridge/track engineering/ballastless track/temperature gradient/experimental study分类
交通工程引用本文复制引用
戴公连,温学桧,苏海霆..寒冷季节桥上无砟轨道横竖向温度梯度研究[J].华中科技大学学报（自然科学版）,2015,(7):1-5,5.基金项目
国家自然科学基金资助项目（51378503）；高速铁路基础研究联合基金资助项目（U1334203）；中国博士后科学基金资助项目（2014M552158）． （）
