铁道标准设计Issue(3)：22-25,4.DOI:10.13238/j.issn.1004-2954.2015.03.005
CRTSⅠ型板式无砟轨道梁端凸形挡台纵向力分析
Longitudinal Force of the Bollard of CRTSⅠBallastless Slab Track
摘要
Abstract
In view of the racking of bollard of CRTS Ⅰ slab track on large-span bridge in recent years, with reference to the actual parameters of domestic continuous rigid frame bridge and on the basis of the reinforcement of the semi-circular bollard of the bridge-end, the design bearing capacity of semi-circular bollard is calculated. An integration model of beam-slab-bridge-pier is established based on the finite element method and the bearing capacity of the bridge-end semi-circular bollard is analyzed and calculated under different fastening resistance, temperature span and linear stiffness of piers. The results show that the longitudinal resistance of fasteners is the main affecting factor for the cracking of the bollard, and the longitudinal force increases with the increasing of the longitudinal resistance of fasteners, which leads to cracking when the longitudinal resistance reaches 17. 0 kN/m/rail since the longitudinal force of the bollard will be over its shear strength. However, the bridge temperature span, and the linear stiffness of piers and braking force have little effect on the longitudinal force of the bollard.关键词
CRTSⅠ型板式无砟轨道/扣件纵向阻力/凸形挡台/纵向力Key words
CRTS I ballastless slab track/Longitudinal resistance of fasteners/Bollard block/Longitudinal force分类
交通工程引用本文复制引用
任勃,杨荣山,姜浩,任娟娟..CRTSⅠ型板式无砟轨道梁端凸形挡台纵向力分析[J].铁道标准设计,2015,(3):22-25,4.基金项目
中国铁路总公司科技开发重点项目(2013G008-C) （2013G008-C）
中央高校基本科研业务费专项资金科技创新项目(2682013CX046) （2682013CX046）
国家自然科学基金项目(51208438) （51208438）
