摘要
鉴于我国刚性、半刚性基层上水泥混凝土路面角隅断裂多发的状况,采用弹性地基上不等平面尺寸双层结构模型分析其产生的原因。面层角隅在单个矩形荷载作用下,讨论了半空间地基和文克勒(Winkler)地基路面结构应力、弯沉的异同,给出了按应力和弯沉等效时地基参数之间的换算关系;分析了基层超宽对面层和基层自身应力的影响,得到了基层超宽系数的近似回归式;探讨了面层角隅受荷和温度梯度共同作用下面层应力采用叠加方法和耦合方法计算的差异;初步给出了板底脱空(层间接触刚度弱化)、邻板接缝传荷对路面结构应力、弯沉影响的规律。
In the light of the fact that the corner break occurs frequently in concrete pavement slab on rigid or semi-rigid base in China highway, a double-layered structure model with unequal planar dimensions resting on an elastic foundation is adopted to analyze this problem. With a rectangular load applying on the pavement slab corner, the stresses and deflections in the pavement structure are obtained by employing half-space foundation and Winkler foundation assumptions, and a transformation relationship between half-space foundation and Winkler foundation is then established according to the equivalence rule of maximum stress or deflection. In addition, the influence of base extension on stresses in the pavement and the base itself is analyzed, and a set of approximate formulas for base extension coefficients are provided accordingly. Subjected to a rectangular load on the pavement slab corner and a temperature gradient through slab thickness simultaneously, the difference of stresses in the pavement is studied by using the coupling method and the superposition method, and the effects of void underneath pavement slabs （contact stiffness weakening between pavement and base）, joint load transfer capacity on stresses and deflections in the pavement structure are discussed.
出处
《工程力学》
EI
CSCD
北大核心
2010年第4期105-110,共6页
Engineering Mechanics
关键词
道路工程
水泥混凝土路面
基层超宽
温度翘曲
板底脱空
接缝传荷
road engineering
concrete pavement
base extension
temperature curling
void underneath pavement slab
joint load transfer capacity
