ABSTRACT
A Three-Dimensional (3D) finite element model has been developed in this study in order to represent the responses of a Hot Asphalt Mix (HMA) and modified and unmodified cold mixtures throughout loading stage. This model has been implemented using Abaqus software to simulate a four-layer pavement structure and the linear elastic behaviour of the asphalt mixtures under static loading. Accuracy and convergence of the developed model have been taken in terms of model dimensions, element types and meshing strategies. Thus, an adequate simulation of tyre footprint has been modelled using rectangular area with 0.7 MPa uniform contact pressure of a single tyre as a surface load.
The results reveal the capability of the model in simulating the effect of the developed asphalt mixtures on pavement deformation and predicting stresses and strains distribution in all pavement layers. Finally, the model simulations demonstrate that the vertical tensile strain at the surface layer can be associated with rutting (permanent deformation) of asphalt pavements.
