铁道标准设计2016，Vol.60Issue(4)：25-29,30,6.DOI:10.13238/j.issn.1004-2954.2016.04.007
CRTSⅡ型板式轨道假缝开裂对轨道受力的影响分析
The Impact of Dummy Joint Cracking in CRTSⅡSlab Track
摘要
Abstract
In order to analyze the impact of the dummy joint cracking on CRTSⅡ slab track, the model of CRTS II slab track on bridge is built. Through finite element method, the influences of different quantity and depth of the dummy joint cracking on CRTS II slab track under different loads are calculated and analyzed. The results show that the track structure is most adversely affected under positive temperature gradient in comparison so far as train load and temperature gradient are concerned. When the crack depth is less than 200mm, the local concrete at the crack fails under pressure. When the crack depth reaches 200mm, the cracking will lead to the destruction of the concrete base and the mortar layer. With the increase of the cracking, the maximum stress of the concrete base and mortar layer decreases. The cracking of the dummy joint will result in prompt change of reinforcing bar stress, but not in the yield failure of the longitudinal reinforcing bar.关键词
CRTSⅡ型板式轨道/假缝/有限单元法/温度荷载Key words
CRTSⅡslab track/Dummy joint/Finite element method/Temperature load分类
交通工程引用本文复制引用
赵华卫,任娟娟,赵林,李潇..CRTSⅡ型板式轨道假缝开裂对轨道受力的影响分析[J].铁道标准设计,2016,60(4):25-29,30,6.基金项目
中国铁路总公司科技研究开发计划(2015G001-F),国家自然科学基金(51208438,51278431) （2015G001-F）
