摘要
针对CRC+AC复合式路面结构的特点和现有研究的不足,运用有限元法,分析了结构层厚度对车辙深度、挠度与应力动态响应的影响规律,对CRC层带缝状态下的AC层层底最大剪应力进行了计算与分析,并分别对车辙深度、AC层层底最大剪应力与AC层厚度的关系进行了回归。研究结果表明:随着AC层厚度的增加,车辙深度呈线性增加;结构层厚度的大小对应力和挠度随时间变化的影响并不明显;考虑AC层厚度对AC层层底最大剪应力的影响,AC层厚度不宜小于6cm。研究结果可为合理设计CRC+AC复合式路面的结构厚度提供理论依据。
Based on the structure characteristics and flaws of existing studies on CRC＋AC composite pavement, this paper analyzes the effect of structure thickness on the depth of rutting and dynamic response of stress and deflection using finite element method, and calculates the maximum shear stress on the bottom of AC layer with the cracks in CRC, and uses regression to get a relationship between rutting depth and the thickness of AC layer and a relationship of the maximum shear stress on the bottom of AC layer and the thickness of AC layer respectively. Research results show that. rutting depth linearly increases as the thickness of AC layer increasing, the structure thickness does not obviously have effect on the deflection and stress changing over time, considering effect of the thickness of AC layer on the maximum shear stress on the bottom of AC layer, the thickness of AC layer not less than 6 cm. The results can provide a theoretical basis for rational design of structure thickness of CRC＋AC composite pavement.
出处
《公路》
北大核心
2014年第1期91-96,共6页
Highway
基金
国家自然科学基金项目
项目编号51178062
51038002
国家高技术研究发展计划(863计划)资助
项目编号2012AA112504
湖南省自然科学基金项目
项目编号14JJ7041
关键词
道路工程
连续配筋混凝土
复合式路面
车辙
动荷载
剪应力
road engineering
continuously reinforced concrete
composite pavement
rutting
dynamic load
shear stress
