层间摩阻力下中面层及动荷载对沥青路面车辙影响的有限元分析

Finite Element Analysis for the Rutting of Asphalt Pavement under Middle Course and Dynamic Load Base on Interlaminar Friction Stress

建立了考虑路面结构层层间摩阻力的沥青路面结构数值计算模型,分析了层间摩阻力下中面层厚度、中面层温度和动荷载对路面结构车辙变形和剪应力大小的影响,并对半刚性和柔性两种路面结构进行了对比分析。结果表明:随着中面层厚度的逐渐增加,车辙变形逐渐增大;半刚性路面车辙随下面层和基层间的层间摩阻力的增大而减小,说明下面层和基层之间的摩阻力对半刚性沥青路面的车辙变形有较大的影响;半刚性路面的车辙随着中面层温度的升高有较大的车辙变形;在动荷载作用下,两种路面结构下车辙比静荷载下均有较大的变形,且柔性路面的车辙变形大于半刚性路面。

An asphalt pavement numerical model considering the interlayer friction stress is established.The influences of different thicknesses and temperatures for middle course and dynamic load base on interlaminar friction stress on pavement rutting deformation and shear stress are analyzed.The results of two pavement structures are compared.The computational results show that with the increase of the thickness for middle course,pavement rutting deformation increases;with the increase of the temperature for middle course,rutting deformation of semi-rigid pavement is greater;rutting deformation of semi-rigid pavement and flexible pavement greater under dynamic load than the one under static load;and rutting deformation of flexible pavement is greater than that one of semi-rigid pavement.