Abstract: Based on finite element software ABAQUS , 3D finite element model was established to analyze the dynamic response of the typical semi-rigid base asphalt pavement. The influences of pavement material damping , the dynamic load parameters and the contact condition between layers on the dynamic response were also analyzed in detail. The results indicate 出at the mechanical response of asphalt pavement under dynamic load appears to be vibrating and attenuating with time , and it is not significantly affected by the material damping. The surface deflection decreases apparently , and the bending stress at the bottom of base layer and subbase layer increases slightly with the load period shortening. The peak values of the dynamic response variables and the axle load ampl山de almost increase linearly with the increase ofaxle load weight. The peak value of the surface deflection increases linearly with the increase of the number of vehicle axles , and the bending stress at the bottom of base layer and subbase layer induced by triple axles is greatest , followed by single axle , double axles. The surface deflection and bending stress at the bottom of base layer are obviously affected by the contact condition between base layer and surface layer or subbase layer , and the bending stress at the bottom of subbase layer is significantly affected by the contact condition between base layer and surface layer.

Key words: semi-rigid base asphalt pavement, dynamic response, load parameter, contact between layers;finte element analysis

摘要： 基于有限元软件ABAQUS ，建立了一典型半刚性基层沥青路面结构动力分析三维有限元模型，分析了材料阻 尼、荷载参数和层间接触等对沥青路面结构动力响应的影响规律。结果表明:动载作用下路面结构响应出现振荡衰 减，阻尼比对路面结构动力响应影响很小;荷载作用时间缩短，路表弯沉有明显减小，而基层和底基层层底拉应力有 所增大;荷载轴重增加，路面结构各动力响应量峰值与荷载幅值近似呈线性增长;荷载轴数增多，路表弯沉峰值随轴 数近似呈线性增长，而三轴引起的基层和底基层层底拉应力要大于单轴，而单轴又大于双轴;路表弯沉受基层与面 层或底基层之间接触条件影响较大，基层层底拉应力受基层与面层或底基层层间接触条件影响显著，而底基层层底 拉应力受基层与面层层间接触条件影响显著。

关键词: 刚性基层沥青路面, 动力响应, 荷载参数, 层间接触, 有限元分析