Dynamic response of inverse structure asphalt pavement under moving load

To study the dynamic response regulations of the inverse structure asphalt pavement under traffic load, a dynamic model of the visco-elastic finite-layer system under moving load was proposed, and the reliability of the model was certified with the field test results. Based on multi-objective evaluation parameters, the influences of the axle load and the vehicle speed on the asphalt pavement response were studied. Results show that the dynamic response increase with the axle load s increasing and the vehicle speed s decreasing, but there is difference betmeen the influences of the axle load and the vehicle speed on different evaluation parameters. With the increase of the axle load, the depth where emerges the maximum shearing strain increases. Under the standard load of BZZ-100, the depth where emerges the maximum shearing strain is about 7 cm. To increase the service life, modified asphalt should be used at the position where emerges the maximum shearing strain. 1 tab, 8 figs, 10 refs.