桥上无砟轨道无缝道岔纵向温度力研究

Study on longitudinal force for joistless switch on ballastless track bridge

为建立能客观反映桥上无砟轨道无缝道岔实际受力情况的计算分析模型,在吸收国内研究成果的基础上,基于有限单元法,建立桥上无砟轨道、无缝道岔伸缩力的计算模型。分析轨温变化幅度、扣件阻力、限位值等轨道结构参数对无缝道岔受力及变形的影响,得出桥上无砟轨道无缝道岔的受力和变形的特点,对无缝道岔的设计和养护维修有一定的指导意义。

In order to reflect the real forces of the joistless switch on ballastless track bridge, on the basis of the research results of both the Chinese and foreign scientists, with the help of finite element method, the model of the longitudinal force and displacement of jointless switch on baUastless bridge was established. It was analysed the influences of some track parameters to the jointless switch such as amplitude of track temperature＇ s variation, resistance of fastener, gap limit of retainer at heel and so on, got the characters of the forces and displacements ofjointless switch on ballastless bridge. All that could be used to guide the structural design and the maintenance of continuous welded turnout.