ABSTRACT
The simplest and most commonly used pavement structural response models are linear elastic multilayer models, although these entail substantial simplification. In particular, with regard to load modeling, it is generally not possible to simulate dynamic loads, to modify the shape of the tire-pavement contact surface or the load distribution on this contact surface. There are other more advanced structural response models that offer a better approach to this issue, while it is the 3D Finite Elements (FE) models that really allow for a deeper understanding of the actual behavior of pavements. In this paper we analyze different aspects that affect the load modeling of a moving axle, including: applied load, eventual oscillation during the circulation, moving speed, inflation pressure, tire-pavement contact surface and pressure distribution on that surface. In addition to this, some recommendations for the modeling of dynamic loads are offered.
