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应用有限元软件Abaqus,建立了沥青路面结构动力分析三维有限元模型,应用该模型,分析了温度、层间接触和荷载等因素对沥青路面结构动力响应的影响规律。结果表明:路面结构各层动力响应受温度的影响较为显著,随着温度降低,面层模量增大,面层层底由受压状态变为受拉状态;不同层间界面的层间接触状态对路面结构各层动力响应量的影响程度不同,基层层底拉应力受基层与底基层层间接触条件的影响最为显著;路面结构各动力响应量随轴重的增加均显著提高,各动力响应量峰值与荷载幅值之间近似呈线性增长关系,不同轴型作用的多轮荷载沿深度方向的叠加效应明显。
The finite element analysis software Abaqus was used to establish the 3D finite element model of dynamic analysis of asphalt pavement structure. The influence of temperature, interlayer contact and load on the dynamic response of asphalt pavement structure was analyzed. The results show that the dynamic response of the pavement structure is affected more by the temperature. As the temperature decreases, the surface modulus increases and the surface of the pavement changes from compression to tension. The interfacial contact between layers The influence of the state on the dynamic response of pavement structure is different. The tensile stress at the base layer is most affected by the contact conditions between the basement and the basement. The dynamic response of pavement structure increases with the increase of axle load. The relationship between the peak value of response and the amplitude of load is approximately linearly increasing. The superposition effect of multiple round loads with different axial loads in the depth direction is obvious.