Dynamic Response Analysis of Urban Road Asphalt Pavement Based on ABAQUS
In order to analyze the influence of dynamic load on the dynamic characteristics of asphalt pavement structure and improve the rationality of pavement structure design,ABAQUS finite element software is used to analyze the influence of factors such as vehicle speed,axle load and pavement smoothness on the vehicle-pavement coupling effect.The conclusions are as follows:under the dynamic loading,the maximum vertical compressive stress on the pavement is 38.37％higher than under static loading,and the dynamic response is significantly different.Compared with Grade A pavement,the maximum vertical displacement of Grade C pavement increases by 18.50％.The higher the speed is,the smaller the compressive stress and vertical displacement of pavement is.Compared with the pavement stress and displacement at a speed of 15 m/s,it decreases by 8.10％and 15.22％when the speed is 30 m/s.The greater the axle load,the greater the vertical stress and displacement of each structural layer of pavement.The stress amplification order is top layer＞middle layer＞bottom layer,while the vertical displacement amplification order is middle layer＞top layer＞bottom layer.
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