论文部分内容阅读
为了分析路面结构参数变化对沥青混凝土路面结构动力响应的影响,采用有限元软件ABAQUS将汽车荷载简化为移动的均布荷载,用8节点等参元模拟路面结构,改变结构层厚度、弹性模量、泊松比等参数以及行车速度对路面结构进行动力分析。通过大量的数值模拟表明,路面各结构层厚度以及弹性模量的增加都会使路表最大弯沉减小,基层泊松比增大时路表最大弯沉呈增大趋势,其他结构层泊松比的增大则使路表最大弯沉呈减小趋势,且经过仿真发现车辆以90km/h的速度通过时路表最大弯沉和上面层的最大拉应力均较小。
In order to analyze the influence of pavement structure parameters on the dynamic response of asphalt pavement structure, the finite element software ABAQUS is used to reduce the vehicle load to a moving uniform load. The pavement parameters of the pavement structure are simulated with 8-node isoparametric parameters to change the structural layer thickness, elastic modulus , Poisson’s ratio and other parameters and driving speed on the pavement structure for dynamic analysis. Through a large number of numerical simulations, it is shown that the maximum deflection of the road surface decreases with the increase of the thickness of the structural layers and the elastic modulus of the pavement, and the maximum deflection of the road surface increases with the increase of the base Poisson’s ratio. The other structural layers of Poisson The maximum deflection of the road surface decreases with the increase of the ratio, and the maximum deflection of the road surface and the maximum tensile stress of the upper layer are smaller when the vehicle passes the speed of 90km / h through simulation.