Asphalt Pavement Rutting Prediction Model Correction Based on Accelerated Loading Test of Full-scale Loop
To improve the accuracy and reliability of the existing rutting prediction model,based on the RIOHTrack full-scale loop accelerated loading test,the rutting prediction model in the current code in China was corrected,and a model correction method is proposed to improve the reliability of the model and make it more suitable for rutting estimation in the region.It is found that the rutting model in the design code of asphalt pavement in China has a significant structural dependence,and the model has the highest estimation accuracy and smallest error for the semi-rigid base asphalt pavement structure with an asphalt concrete layer thickness of 12 cm,while the estimation accuracy of other structures is not high.To improve the accuracy and reliability of the rutting prediction model,a new model was established by introducing local correction coefficients into the existing model.After local correction,the accuracy of the rutting prediction model for all structures was greatly improved:the MAPE was reduced from 29.04％to 7.81％before correction for a single structure,and the coefficient of determination R2 was greater than 0.82;the MAPE was lower(6.34％-7.99％)and the coefficient of determination R2 is above 0.87 when the correction is classified according to seven major structures.Based on the characteristics of different pavement structures and materials,as well as the influence of local climate and traffic loads,the modified model is more suitable for the rutting prediction of various pavement structures in the RIOHTrack area.
NETL
NSTL
万方数据
