Rutting prediction of asphalt pavement based on the vehicle-pavement coupled dynamic load

The time domain model of roughness based on international roughness index was established by Inverse Discrete Fourier Transform. The multiple-degree-of-freedom vehicle model was founded by dynamic simulation software ADAMS. Based on mathematical statistical analysis for load spectrums and the influence of vehicle's actual loading condition and intermissive time, dynamic loading model was obtained. The modified Burgers model's parameters of the asphalt pavement mixture were gained though the dynamic creep test in laboratory. Based on the theory of visco-elastoplastic and Finite Element Method (FEM), a method of rutting prediction in asphalt pavements was put forward. The error is less than 10% between the prediction value and measured value in the test road. The result shows that the method of rutting prediction in asphalt pavement based on the coupled dynamic load is reasonable and feasible, which provides a worthy reference for similar research.