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针对沥青路面在荷载作用下产生的竖向变形,笔者利用离散元方法对组成沥青路面的集料、结合料及两者之间的粘结指定接触连接的约束方式,给出了路面结构组合和双轮加载模式,研究了沥青路面各结构层的竖向变形特性及颗粒的位移矢量变化。结果表明:路面结构在双轮荷载作用后,形成的竖向变形呈“W”形且最大变形出现在上面层,沿道路深度方向的颗粒运动逐渐减弱。
Aiming at the vertical deformation of asphalt pavement under the load, the author uses the discrete element method to design the constraining way of the aggregate, the binder and the bonding contact between the pavement and the asphalt pavement, Wheel loading mode, studied the vertical deformation characteristics of the various layers of asphalt pavement and particle displacement vector changes. The results show that the vertical deformation of the pavement structure is “W” shape and the maximum deformation appears on the upper layer after two-wheel load, and the particle movement along the depth of the road gradually weakened.