铁道科学与工程学报2017，Vol.14Issue(9)：1820-1828,9.
成都地区双块式无砟轨道温度场特性研究
Study on temperature field characteristic of twin-block ballastless track in Chengdu
摘要
Abstract
To obtain the temperature field distribution characteristic of twin-block balastless track in Chengdu, a CRTSⅠtwin-block ballastless track was established in Chengdu suburb. The temperature and meteorological elements were real-time observed for one year. The corresponding relation between temperature inner track structure and meteorological elements in different seasons was analyzed comprehensively, and the conclusions were as follows. The temperature of the internal track structure showed cyclical fluctuation with the fluctuation of temperature on sunny days, and the temperature extreme value of two adjacent layers inner track structure appeared lag in the vertical, while the periodic variational regularity were not obvious on rainy days, which showed that deck temperature was influenced by solar radiation, especially in the 50 mm under the surface of deck. The correlation between temperature diurnal variation of the angle, edge and medium of the track and the air temperature diurnal variation was linear, and the daily temperature lifting loads of deck was recommended to reference the central measurement data of deck. The vertical temperature load mode showed exponential function. Using multiple linear regression analysis method, the coupling prediction models of the deck's maximum positive temperature gradient was got, and the similarity was higher than 0.85, which could be used to predict engineering structure design load.关键词
CRTSⅠ型双块式无砟轨道/温度场/太阳辐射强度/温度荷载模式/预估模型Key words
CRTSⅠtwin-block ballastless track/temperature field/solar radiation intensity/temperature load mode/prediction model分类
交通工程引用本文复制引用
邓非凡,赵坪锐,向芬,李健,牛晨,龚闯..成都地区双块式无砟轨道温度场特性研究[J].铁道科学与工程学报,2017,14(9):1820-1828,9.基金项目
国家重点基础研究发展计划(973计划)资助项目(2013CB0036202) （973计划）
国家自然科学基金高铁联合基金资助项目(U1434208,U153420) （U1434208,U153420）
国家自然科学基金面上资助项目(51678506) （51678506）
