有轨电车嵌入式轨道板温度翘曲变形量研究  

Temperature Buckling Deformation of the Embedded Track Slab in Tramcar System

作　　者：易欣[1] 杨刚 刘光胜 

机构地区：[1]广深铁路股份有限公司广州工务段,广州助理工程师510600 [2]成都市新筑路桥机械股份有限公司,成都助理工程师611430

出　　处：《城市轨道交通研究》2016年第6期97-100,共4页Urban Mass Transit

摘　　要：选取已铺轨并覆盖200 mm绿化土的嵌入式轨道板,对其温度梯度及高程变化进行连续24 h观测,以研究气温变化对轨道板温度梯度及翘曲变形的影响。采用理论方法和有限元数值方法计算轨道板翘曲变形,并将计算结果与实测值进行对比分析,为嵌入式轨道的结构设计提供参考。结果表明:在24 h观测时间内,轨道板温度梯度基本为正,其最大值为10.4℃/m。在最大正温度梯度作用下,轨道板最大翘曲变形为0.028 0 mm。通过理论计算和数值计算得到的最大翘曲位移分别为0.019 4 mm和0.027 0 mm。二者均与现场测量结果接近,验证了温度实测数据、有限元数值计算模型及边界条件的准确性和可靠性。To study the effect of temperature variation on the temperature gradient and the buckling deformation of embedded track slab within 24 hours, a good track-laying that covers 200 mm greening soil slab is selected. According to the field test, theoretical method and finite element numerical method are used to calculate the slab warping displacement, and provide reference for the structural design of embedded track. The results show that within an obser- vation of 24 hours, the performance of the slab displays substantially a positive temperature gradient, the maximum positive temperature gradient is 10.4 ℃/m, and the maximum warping deformations of slab is 0. 0280 mm. Through theoretical calculation and numerical computation, the maximum warping displacement is measured as 0.019 4 mm and 0. 027 0 mm respectively, both are close to the results of field measurement. Thus the rationality and reliability of the measured temperature data and the finite element model are verified.

关 键 词：有轨电车 嵌入式轨道 温度梯度 翘曲变形 

分 类 号：U492.433[交通运输工程—交通运输规划与管理]