梁端位移对无砟轨道扣件系统的影响分析  

The Influence of the Displacement at Bridge Ends to the Fastening Systems Used on Ballastless Tracks

作　　者：赵坪锐[1] 肖杰灵[1] 刘学毅[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《铁道学报》2008年第5期68-73,共6页Journal of the China Railway Society

基　　金：教育部新世纪优秀人才支持计划项目(NECT-05-0798);西南交通大学创新团队培育计划资助项目(2007IRT06)

摘　　要：针对采用小阻力扣件系统的无砟轨道,分析梁端转角、梁端悬臂长度、错台高度、坡道桥梁伸缩等因素对扣件系统的影响,其中扣件间距、坡道上桥梁伸缩的影响较小,而错台高度、梁端转角和胶垫刚度的影响较大,综合考虑竖向荷载、梁端转角、错台等主要因素对扣件系统的受力影响,从限制扣件上拔力不超过弹条扣压力的角度提出了不同胶垫刚度、不同错台高度情况下的梁端转角限值,其中单侧正转角限值大于对称转角限值,对称转角限值大于单侧负转角限值。扣件刚度越大、错台高度越高,梁端转角限值越小,不同的扣件设计参数将有不同的限值要求。The influence of the displacement at bridge ends to the low resistance fastening systems used on ballastless tracks is analyzed in this paper. The following factors are considered including the angles of rotation at bridge ends, overhanging lengths of bridge ends , step height and thermal extension of the sloped bridge. Among these factors, the influence of the fastener space and thermal extension of the sloped bridge are on the small side, whereas the step height, the angles of rotation at bridge ends and pad stiffness are on the large side. To guarantee the uplift limits of the clip, the limits of the bridge end rotation under different pad stiffness and different step heights are gained taking into account the influence of the vertical loads, angles of rotation at bridge ends and step heights to the fastening system. The limits of one side positive rotation are greater than symmetrical rotation, the limits of symmetrical rotation are greater than one side negetive rotation. The bigger the pad stiffness and step height, the less the limits of the angles of rotation at bridge ends. There will be different limits requirements with different fastening system parameters.

关 键 词：无砟轨道 扣件系统 梁端转角 错台 

分 类 号：U213.244[交通运输工程—道路与铁道工程] U441.7[建筑科学—桥梁与隧道工程]