移动非均布荷载作用下的沥青路面动力响应分析

为更准确地模拟沥青路面实际的受力状态，基于弹性层状理论，借助大型有限元分析软件ANSYS，建立了沥青路面三维有限元粘弹性模型，并对其施加非均布垂直和切向摩擦行为的共同影响，分析车辆在匀速行驶时，沥青路面在不同载重车辆荷载作用下的动力响应。结果表明，纵向最大拉应力位于基层层底，纵向最大压应力位于沥青面层。超载显著增加了各层结构应力，加速了路面结构的破坏。路面设计时应提高上层材料的抗压强度。

Analysis on Dynamic Response of Asphalt Pavement under Non-uniformly Distributed Moving Load

Aimed at a more accurate simulation of actual stress state of asphalt pavement and based on the elastic layered theory, three-dimensional finite element viscoelasticity model is established for asphalt pavement by finite element analysis software ANSYS, and then the combined non-uniformly distributed vertical and tangential friction is applied to the model so as to analyze the dynamic response of asphalt pavement under different vehicle loads when the vehicles are at constant speed. The results show that the maximum longitudinal tensile stress is at the base, while the maximum longitudinal compressive stress is on the surface. Overloading significantly increases structural stress at the layers and accelerates the destruction of pavement structure. Therefore, the compressive strength of materials at upper layer should be improved in pavement design.