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城市交叉口路面由于车辆制动启动频繁,交通渠化严重,导致车辙病害严重。针对此现象,进行了交叉口沥青路面的有限元受力分析。在有限元假定的基础上,确定了3种荷载工况下的轮胎作用面积和接地压力分布,从车辆荷载、环境温度、车辆速度、路面层厚度、面层基层模量组合等方面对路面受力情况进行敏感度分析。结果表明城市交叉口路面的剪应力是导致车辙病害严重的主要原因,车辆重载及高温低速的行驶状况更加重了病害,交叉口路面结构材料的设计应着力于提高顶层材料的车辙抵抗力。
Due to the frequent start-up of vehicle braking, the pavement of urban intersections has severe traffic canalization, resulting in severe rutting. In response to this phenomenon, the finite element stress analysis of asphalt pavement at the intersection was carried out. Based on the finite element assumption, the tire action area and the contact pressure distribution under three load conditions were determined. From the aspects of vehicle load, ambient temperature, vehicle velocity, pavement layer thickness and surface base layer modulus combination, Sensitivity analysis of the situation. The results show that the urban road junction shear stress is the main reason leading to rutting diseases. Vehicle overloading and high temperature and low speed driving conditions are more serious diseases. The design of intersection pavement structural materials should focus on improving the rutting resistance of top material.