沥青路面结构的最大剪应力

Maximum shearing stress of asphalt pavement structure

为了减缓重载、高胎压和高速度等重交通条件所引起轮载下强大的剪应力,解决渠化交通下沥青混凝土路面的车辙问题,分析了路面实际剪应力力学,采用有限元方法建立模型,对沥青混合料抗剪切强度进行计算,对不同温度、不同层间接触情况和不同荷载情况下半刚性基层沥青混凝土面层内最大剪应力进行了分析,得出了不同温度、不同荷载条件下最大剪切应力的大小和位置。结果表明:当路面结构中层间接触条件为完全连续状态、较小水平荷载和垂直荷载、较低的温度条件下,沥青路面结构不易遭受剪切破坏。

In order to slow down the formidable shearing stress which is caused by the heavy traffic conditions with heavy load,heavy tire pressure and high velocity,to solve especially the wheel rut problems of asphalt concrete pavement under the channel traffic,this paper analyzed the maximum shearing stress in the unit and asphalt concrete pavement with semi-rigid base under different temperatures,and the different loads.A finite element modal is established to analysis maximum shear stress in asphalt concrete pavement on the semi-rigid pavement under different temperature,loads and contract conditions between layers.The result shows that asphalt pavement structure is not easy to occur shear failure under the conditions of low loads,temperature level and completely continuous contract between layers.8 tabs,2 figs,9 refs.