Experimental research on dynamic response of road pavement under different loads and speeds of vehicles

In light of the importance of vehicle loads and speed in damage of road pavement structure, dynamic responses of road pavement under different vehicle loads and speeds are researched through in-situ experiments on a newly-built freeway. The research results show that the peak values of stress and strain increase with accretion of vehicle loads; but decreases with speed increasing; the increasing range with loads of the landscape orientation strain of front-wheel drive is less than the vertical strain of front-wheel drive; but the increasing range with loads of the landscape orientation strain and vertical strain of rear wheel is close; amplitude change of the dynamic stress and strain by speed is less than by loads; the effect of dynamic stress on pavement by vehicle traffic weaken promptly.