路面张开型反射裂缝产生机理的力学分析

Mechanistic Analysis for the Opening Reflective Cracking in Asphalt Overlays

建立一个较为完备的力学模型，以研究在有接裂缝的旧水泥混凝土路面板或半刚性基层上加铺沥青面层的路面结构在基层板出现收缩应变条件下的力学行为．引入了一个较好揭示路面张开型反射裂缝产生机理的系数─—应变反射系数，给出了它在不同夹层状况、地基摩阻现象以及面层采用局部处理等场合下的计算显式．

The paper develops a more complete analysis model to study thebehavior of asphalt overlays on the existing pavements or semi-rigid pavementswhen the underlying course contracts uniformly. The concept of 'strain reflectivecoefficient' is introduced, which reveals the mechanism of the opening reflectivecracking resulting from contraction. Furthermore, the paper discusses the specificformulas in consideration of the interlayer, the frictional resistance force betweenthe underlying course and subgrade, and asphalt overlays with partial reinforceme-nt.