重载交通柔性基层沥青路面结构力学响应及设计指标

On Mechanical Response & Design Index of Flexible Base Asphalt Pavement Structure of Heavy Traffic

对重载下柔性基层沥青路面结构进行力学计算,分析路表弯沉、结构层层底拉应力和拉应变、路表剪应力等力学指标随荷载的增大而发生的变化,给出柔性基层沥青路面的主要破坏特征。结合国内外长寿命柔性基层沥青路面的研究,提出重载交通下柔性基层沥青路面设计指标。

Structure mechanic response of flexible asphalt pavement is calculated under heavy traffic in this paper.The developing tendency of surface deflection,tensile stress or strain at the bottom of structural layers and surface shear stress with load increasing is analyzed.The major damage characteristic of flexible pavement is proposed.Combined with the study of long life flexible asphalt pavement,design index of flexible base asphalt pavement under heavy traffic is proposed.