基-面层间粘结状态对沥青路面车辙的影响

通过有限元软件模拟基-面层间局部不同粘结状态的沥青路面结构,计算分析了路面处于弹性阶段时荷载作用下的力学响应,结果表明：在车辆荷载作用下,由于基-面层间出现局部完全滑动,路面各面层底最大主拉应变都有增大,最大剪应变以表、中面层底变化明显,竖向压应变以越靠近牯结状态变化区越大;车轮制动,竖向荷载与水平荷载的联合作用加大了路面结构的变形.在此基础上,进行了室内车辙试验,较好地验证了,由于结构层间局部粘结失效,会导致沥青路面出现车辙.

The Influence of the Bonding State Between Base and Surface Layers on the Asphalt Pavement Rutting

Asphalt pavement structures of different bonding states between base and surface layers are simulated by using the finite element software and the mechanical response of the pavement under loads are calculated when in elastic stage.Results shows that：under vehicle loads,due to the emergence of partial entire sliding between the base and surface layers,maximum principal tensile strain has increased at the bottom of each layer,the maximum shear strain changes obviously at the surface and middle layers,vertical compressive strain changes greater at the area which is closer to the bonding state area ; considering wheel braking,the combined effects of the vertical loads and horizontal loads increased the deformation of the pavement structure.At the same time,the indoor rutting test preferably verified that the partial interlayer bonding failure between the structural layers will cause the asphalt pavement rutting.