Research On Asphalt Pavement Evaluation Method Based On Human-vehicle-road Interaction

Pavement roughness on human comfort,vehicle vibration and service life of road has a significant impact.However, analysis of existing asphalt pavement evaluation found that person was not included in the vehicle model, the evaluation index of comfort with people only through the contrast with the subjective evaluation test to prove that.Therefore, the people of the weighted root-mean-square (RMS) acceleration method for evaluating the roughness of asphalt pavement of great theoretical and practical significance.The author analyzed several smooth Gaussian random process simulation methods of pavement elevation. From cost savings and shorten the research cycle considerations, a suitable for random superposition method of sine wave was simulated pavement model data. The author simulated a road length of 1000m, 0.25m discrete interval of A, B, C and D four grades of the road. Simulation of the road model validation, simulation results showed that the surface elevation required in the GB range. Use of international standards recommended by the ISO2631 standard root-mean-square value of weighted acceleration of vibration to the passengers to evaluate, at the same time as the roughness of asphalt pavement evaluation. Then, from the study aims to simplify the calculation and the actual situation in the areas close to consider the vehicle model would be reduced to 3 and 5 degrees of freedom (DOF) vibration model vehicles. At the same time, based on Newton's law was given 3, respectively, and 5 DOF vehicle vibration differential equations. Transfer matrix method using a detailed analysis of 3 and 5 DOF vehicle models for calculating the process of vibration differential equations, and MATLAB program in order to prepare a calculation; at the same time, analysis of 3 and 5 DOF vehicle model parameters on the calculation results. In addition, the use of a wide range of choices at home and abroad three Asphalt Pavement Evaluation with the weighted RMS value of the associated acceleration of research, results showed that the international roughness index, power spectral density, and standard deviation of roughness thecorrelation coefficient(R~2) were as follows: 0.9263,0.8484 and 0.8713. Finally, the thesis given the roughness of asphalt pavement evaluation steps: First, access to the road vertical section elevation to determine the vehicle model and the structural parameters; second, sections were obtained by calculating the weighted root mean square acceleration value to determine the sections of people's comfort, which determined the situation of the roughness of asphalt pavement. At the same time, in a simulated road surface elevation based on the analysis of this step in accordance with 3 and 5 DOF vehicle model evaluation asphalt pavement example.