铁道科学与工程学报2011，Vol.8Issue(1)：19-23,5.
温度及收缩荷载下路基上双块式无砟轨道力学及裂缝特性研究
Study on mechanics and crack behavior of twin -block ballastless track on subgrade under the temperature and shinkage load
摘要
Abstract
Temperature and shrinkage load are the important load of twin - block ballastless track. The paper regarded twin- block ballastless track on subgrade as the research object. The steels in track concrete layer were simulated by beam element; the track concrete layer, the twin -block sleeper, the support layer were simulated by solid element; the concrete and the steels in the track concrete layer, the support layer and subgrade were simulated by the spring element . A mechanics model of interaction of the steel bar and the conncrete which considered the cracking of the concrete was established and the corresponding computer program was developed. This paper analyzed mechanics and crack behavior of twin - block ballastless track on subgrade under the temperature and shrinkage load, studied the effects of twin - block ballastless track type, the thickness of the roadbed slab,the reinforcement ratio of the roadbed slab and the crack interval of the roadbed slab on twin - block ballastless track mechanical behavior and the crack width.关键词
温度荷载/收缩荷载/双块式无砟轨道/力学特性/裂缝宽度Key words
temperature load/ shrinkage load/ twin -block ballastless track/ mechanical behavior/ crack width分类
交通工程引用本文复制引用
吴斌,张勇,曾志平,徐庆元,李平..温度及收缩荷载下路基上双块式无砟轨道力学及裂缝特性研究[J].铁道科学与工程学报,2011,8(1):19-23,5.基金项目
中南大学前沿研究计划重点项目(2010QZZD018) （2010QZZD018）
国家自然科学基金资助项目(50908236) （50908236）
湖南省自然科学基金资助项目(09JJ4022) （09JJ4022）
高等学校博士学科点专项科研基金资助课题(20090162120038) （20090162120038）
中国博士后科学基金资助项目(20080440993) （20080440993）
中铁第四勘察设计院科技开发项目(2008K01) （2008K01）
