铁道标准设计Issue(8)：26-29,4.
桥墩温度梯度对高墩大跨桥上无砟轨道影响研究
Effects of Pier Temperature Gradient on Ballastless Track of Long-span Bridge
摘要
Abstract
Due to solar radiation, both sides of a bridge are subjected to different temperatures. Where the height of a pier is larger, the pier will experience a greater longitudinal displacement, forcing the beam body, the track slab and the rail to displace, generating additional stress on CWR on the bridge. In order to understand the law of force and deformation of the ballastless track under pier temperature gradient, a line-bridge-pier integration model of CWR is established based on the beam-track interaction principle and the finite element method. The results show that the additional stress on the rail increases with the increase of the piers stiffness in perspective of only the vertical temperature gradient of pier load. In consideration of both the beam heating and the vertical temperature gradient, the additional rail stress is less than that when the stress generated by beam heating or vertical temperature gradient is considered respectively. The boss stress and resin deformation are not changed greatly regardless of the only pier vertical temperature gradient, or both the beam heating and vertical temperature gradient.关键词
高墩大跨连续刚构/温度梯度/无缝线路/树脂变形Key words
High pier and long span continuous rigid frame/Temperature gradient/CWR/Resin de-formation分类
交通工程引用本文复制引用
罗华朋,邢俊,杨凯,王平..桥墩温度梯度对高墩大跨桥上无砟轨道影响研究[J].铁道标准设计,2015,(8):26-29,4.基金项目
中央高校基本科研业务费资助项目(SWJTU12CX079) （SWJTU12CX079）
