中文摘要：

在动荷载作用下，沥青路面结构的应力、弯沉值变化规律同静载作用时不同。应用有限元程序NASTRAL对沥青路面在竖向动态载荷作用下的路面结构响应进行了数值模拟，分析了二维平面应变模型动态响应规律。指出在竖向动态荷载作用下，随着车速的增加，路面的最大弯沉将减少，其值视动载作用时间不同而为静载作用时的几分之一到十几分之一。当载荷消失后，路面内各计算点的应力值迅速减小，尤其竖向应力减小幅度更大。路面最大弯沉值与路面内各计算点的应力最大值出现时间不同，应力在载荷消失后立即达到最大值或延迟时间非常短，而弯沉最大值延迟时间相对较长。

英文摘要：

Under dynamic loading, deflection value and stress of asphalt pavement are different from immovable load. The finite element software NASTRAL was employed to investigate the structural response of 2-Dimensional asphalt pavement under excitation. It is pointed out that under the vertical dynamic load, the max deflection value will decrease to one of several times. After the lode disappearance, the stress of each calculation point in the road diminishes quickly, particularly the verticial stress. Under vertical dynamic loading, the max deflection value will decrease with the loading time diminishing and also that of the stress of asphalt pavement.