%0 Journal Article
%T 秋季桥上纵连板式无砟轨道竖向温差试验研究
%A 戴公连
%A 苏海霆
%A 闫斌
%J 湖南大学学报(自然科学版)
%D 2015
%X 通过对某客运专线曲线段简支梁桥上纵连板式无砟轨道结构温度场的连续观测，研究了秋季多种天气情况下曲线桥上无砟轨道温度场的时变规律.基于统计拟合，提出适用于我国典型地区纵连板式无砟轨道秋季竖向温度荷载模式.研究表明：轨道结构昼夜温度变化剧烈，表面最高温差可达16.0 ℃，平均日温差达8.0 ℃；随着距表面深度的增加，轨道结构温度变化幅值逐渐减小，峰值出现时间不断滞后；底座板底面最大日温差为1.5 ℃，平均为0.8 ℃；纵连板式无砟轨道结构的竖向温差可拟合为指数曲线，其曲线形式与中国铁路桥梁设计规范规定的箱梁竖向温差分布曲线在形式上较为相似.</br>Based on the results of continuous observations of the longitudinally connected ballastless track on curved bridges, the time-dependent deformations of vertical temperature gradient in different kinds of weather were discussed. Based on statistics and curve-fitting, raised temperature load models were fit for typical areas in our country. The analysis results reveal that the changing of the temperature in the track structure is fast, the temperature changing value of surface was 16.0℃ in maximum and 8.0℃ in average, the temperature changing value became small, and the time of maximum temperature come late with the increase of distance to surface, and at the bottom of the track structure, the temperature changing value was 1.5 ℃ in maximum, 0.8 ℃ in average, the fitting curve of vertical temperature gradient in longitudinally connected ballastless track on curve bridge can be exponential curve, and the distribution law matches the provisions about the vertical temperature gradient of the code for the design of railway bridges and culverts in China.
%K 铁路桥梁 铁道工程 轨道结构 温度分布 试验分析&lt
%K /br&gt
%K railroad bridges railroad engineering track structure temperature distribution experimental analysis
%U http://hdxbzkb.cnjournals.net/ch/reader/view_abstract.aspx?file_no=20150315&flag=1