高速铁路桥梁箱梁温度场有限元分析  

Finite Element Analysis for Temperature Field of High-speed Railway Box Girder

作　　者：汪禹 WANG Yu(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《交通科技》2022年第4期45-50,共6页Transportation Science & Technology

摘　　要：文中以合福高铁32 m简支箱梁为工程背景,通过预先埋设的温度传感器获得实时监测数据,建立高速铁路箱梁温度场有限元模型,并验证其准确性。利用有限元仿真技术,研究箱梁-轨道系统的温度分布特征,探讨高速铁路箱梁及CRTS I型单元双块式轨道的温度梯度模式。结果表明,距离箱梁顶板表面150 mm范围内,其传热现象较明显,顶板最大正温差可达12℃以上。考虑到轨道及附属设施对箱梁顶板表面的遮盖效应,分别以裸梁、铺设轨道、运营阶段提出箱梁-轨道系统的竖向和横向温度梯度分布规律。Based on the engineering background of Hefei-Fuzhou high-speed railway 32 m simply supported box girder,the finite element model of temperature field of high-speed railway box girder was established and its accuracy was verified through the real-time monitoring data obtained by the temperature sensor buried in advance.By using finite element simulation technology,the temperature distribution characteristics of box girders and track system were studied,and the temperature gradient modes of box girders and CRTS I-type element double block track of high-speed railway were discussed.The results show that the heat transfer phenomenon is obvious within 150 mm distance from the roof surface of the box girder,and the maximum positive temperature difference of the roof can reach more than 12℃.Considering the covering effect of track and auxiliary facilities on the roof surface of box girder,the vertical and transverse temperature gradient distribution of box girder-track system is proposed in terms of bare beam,laid track and operation stage respectively.

关 键 词：高速铁路箱梁 温度场 箱梁-轨道系统 温度梯度 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]