层间接触对沥青路面抗车辙性能的影响

Influence of Interlayer Contact on Anti-rutting Performance of Asphalt Pavement

针对沥青路面车辙的影响因素,建立了沥青路面车辙分析的有限元模型,采用黏弹塑性理论,利用有限元软件ABAQUS分析了层间接触对沥青路面车辙的影响。对不同荷载、不同层间接触和不同路面结构的沥青路面的剪应力和车辙深度进行了计算。结果表明:对半刚性基层路面和柔性基层路面,良好的层间接触均能提高沥青路面的抗车辙能力;在相同荷载和层间摩阻力下,柔性基层沥青路面的车辙变形要大于半刚性基层沥青路面;对于半刚性基层路面,基面层的接触状态对沥青路面车辙的影响要比中下面层的接触状态大;在不同的层间接触和不同的沥青路面结构下,随着荷载的增大,层间接触较差的路面车辙变形大,超载对柔性基层路面车辙变形的影响要大于半刚性基层路面。

Aiming at the influencing factors of rutting in asphalt pavement,a finite element model for analysing rutting in asphalt pavement is established. According to the viscoelastic plasticity theory,the influence of interface contact on the rutting in asphalt pavement is analysed by using finite element software ABAQUS. The shear stresses and rutting depths in asphalt pavement under the conditions of different loads,different interface contacts and different pavement structures are computed. The research result shows that（ 1） for semi-rigid base pavement and flexible base pavement,good interface contact can improve the anti-rutting performance of asphalt pavement;（ 2） under the same load and interlayer friction,the rutting deformation of the flexible base pavement is greater than that of semi-rigid base pavement;（ 3） for semi-rigid base pavement,the effect of interface contact between base layer and surface layer on rutting in asphalt pavement is greater than that of the interface contact between middle and lower surface layers on rutting in asphalt pavement;（ 4） under the conditions of different interlayer contacts and different asphalt pavement structures,with the increase of load,the rutting deformation is greater when interface contact condition is worse,the effect of overload on rutting deformation of flexible base pavement is greater than that of semi-rigid base pavement.