分层变模量下的沥青路面车辙预估模型OACSTPCD

To establish the rutting prediction model of asphalt pavement under layered variable modulus,the deviation of perma-nent deformation prediction of asphalt pavement caused by dynamic modulus change was corrected.Based on the asphalt mixture dy-namic modulus test and laboratory triaxial dynamic creep test,the correlation between the asphalt mixture dynamic modulus(| E∗ |)and its high-temperature deformation resistance was verified.Abaqus finite element software was used to analyze the dynamic modulus and vertical compressive stress of asphalt pavement with depth and temperature at different times,and the correction factor(m)of ver-tical compressive stress of each sub layer under different dynamic modulus was proposed.According to the idea of' sub layer deforma-tion superposition',a rutting prediction model of layered variable modulus asphalt pavement was established by using SPSS software re-gression analysis,which included temperature,asphalt layer thickness,vertical compressive stress,correction factor,load action times and other factors.The results showed that the established rutting prediction model can more accurately predict the permanent deforma-tion of asphalt pavement,improve the rutting prediction accuracy of middle and lower layers by 6.03% and 10.34%,respectively,and improve the overall asphalt layer by 5.19%.