A Study on Numerical Simulation of Asphalt Concrete Pavement Dynamic Characteristics

To study the influence of pavement thickness,modulus,loading speed and other factors on the asphalt concrete pavement under FWD dynamic behavior,the model is established based on the principle of finite element,then model accuracy is verified through comparative analysis with the measured data,the deflection and stress and other dynamic properties of the asphalt concrete pavement under FWD and the influences of surface thickness,modulus,loading speed on dynamic behavior are studied,focusing on the changing trend of stress and road deflection of below layer,primary and sub-base on the condition of different structure thickness and loading rate.Studies show that: the dynamic properties of asphalt concrete pavement is influenced by the change of the thickness of the structure,design parameters(modulus,etc.),loading speed and other factors,the findings contribute to pavement structural optimal design and damage analysis.