沥青混凝土路面面层与基层间破坏数值分析

Influence of interlayer damage between surface layer and base layer in asphalt concrete pavement based on finite element method

市政公路是国民经济建设的基础设施,然而,此种路面结构在路面面层较薄的情况下,很容易发生剪切滑移现象。基于固体力学与弹性力学理论,采用有限元方法,对沥青混凝土面层的力学行为进行数值模拟。结果表明:在受到车辆荷载与温度荷载时,均可能造成沥青混凝土路面面层—基层层间破损,且这种破损也会改变面层、层间的应力分布,使其加速破坏,因此,沥青混凝土路面面层—基层层间剥离的早期检测与维修至关重要。

Municipal highway is one of most important infrastructures of national economic construction.However,shear slip damage would occur in this kind of pavement structure due to the small thickness of the surface layer.This paper studies the interlayer mechanical behavior of asphalt concrete on the basis of solid mechanics,elastic mechanics,and finite element method.The results show that under the vehicle load and temperature load,the damage would occur between the surface layer and the base layer of the asphalt concrete pavement.In addition,this kind of damage will also change the stress distribution between the surface layer and the base layer,which will occur the damage further.Therefore,it is important to detect and maintain the interlayer early damage between surface layer and base layer in order to prolong the service life of asphalt concrete pavement.