Visco-Elasto-Plastic Analysis on Structural Response of Asphalt Pavement Longitudinal Gradient

Asphalt Pavement was damaged more seriously in longitudinal Gradient than common segment because of its special load bearing conditions. This paper advance A simple model of 3D Visco-elasto-plastic Finite Element to analyses the discipline of stress-strain behaviors, using Burgers model to study the distribution of rutting under different longitudinal gradient and frequency of tyre load. The result of research show that：the value of maximum shear stress grows as the gradient increase. Before a certain number of tyre load, the incensement of rutting was small, when tyre load beyond the certain number, the rutting incense notably, and the greater the Gradient is, the faster the rutting increases.