铁道标准设计Issue(1)：43-47,48,6.DOI:10.13238/j.issn.1004-2954.2016.01.009
CRTS玉型板式无砟轨道凸形挡台树脂离缝成因分析
The Cause Analysis of Open Joints between Resin Layer and Convex Retaining Platform of CRTSⅠSlab Ballastless Track
摘要
Abstract
The open joints between resin layer and convex shape platform of CRTSⅠ slab ballastless track are located on the bridge section. This paper establishes a CRTS Ⅰ slab ballastless track dynamic model to analyze the longitudinal force of resin layer and simulates the fastening force in different conditions and friction with finite element method to analyze the pressure of resin layer. The results show that when the resin layer experiences plastic deformation on account of the longitudinal force, the resin layer will not be fully rebound along with the disappearance of load and temperature drop, resulting in open joints. And the open joints develop further under the effect of beam-end rotation angle and train vibration load. In case of larger longitudinal resistance , the resin layer is broken by shear at the contact position between the lower surface of the track slab and the resin layer. The change of friction has small effect on the compression displacement and the shear stress of the resin layer.关键词
CRTSⅠ型板式无砟轨道/凸形挡台/填充树脂/离缝/剪切破坏Key words
CRTSⅠslab ballastless track/Convex retaining platform/Resin layer/Open joint/Shear failure分类
交通工程引用本文复制引用
苏乾坤,杨荣山..CRTS玉型板式无砟轨道凸形挡台树脂离缝成因分析[J].铁道标准设计,2016,(1):43-47,48,6.基金项目
国家自然科学基金(51278431) （51278431）
