铁道科学与工程学报Issue(2)：229-234,6.
考虑黏结滑移关系的连续道床板伸缩刚度计算方法
The calculation method for longitudinal stiffness of continuous track slab considering the bond slip relationship between concrete and rebar
摘要
Abstract
Cracks will occur in the continuous track slab when temperature drops and concrete shrinks,which will induce a reduction of the longitudinal stiffness.Different crack spacing can lead to a big difference in longi-tudinal stiffness.Meanwhile the longitudinal stiffness is a very important parameter for determining the thermal stress in continuous track slab.In this paper,a calculation method about longitudinal stiffness of continuous track slab was established considering the bond slip relationship between concrete and rebar.The stress distribu-tion of concrete and rebar,bonding resistance and longitudinal stiffness were calculated using this method.The influence of the bond slip relationship,concrete grade and reinforcement ratio to the reduction of the longitudinal stiffness were studied.The results show that even at a certain crack spacing the longitudinal stiffness is not a con-stant,but tends to decrease with the larger tension load.The concrete grade has little influence on the reduction of longitudinal stiffness,while the reinforcement ratio has great impact.In the process of checking calculation,a proper boundary condition should be added to get a stress and stiffness distribution under different crack spacing and temperature conditions.关键词
连续道床板/伸缩刚度/温度力/黏结滑移关系Key words
continuous track slab/longitudinal stiffness/thermal force/bond slip relationship分类
交通工程引用本文复制引用
赵坪锐,邓非凡,胡佳..考虑黏结滑移关系的连续道床板伸缩刚度计算方法[J].铁道科学与工程学报,2015,(2):229-234,6.基金项目
国家重点基础研究发展规划（973计划）项目（2013CB036202）；国家自然科学基金资助项目（51008258）；中央高校基本科研业务费专项资金资助项目 （）
