ABSTRACT
In this chapter, first, the approach to analyse a single layer continuum (that is, a half-space) is presented. Subsequently, the approach is extended for a muti-layered case (with smooth or rough interface), representing an idealized asphalt pavement structure. To formulate a problem (so as to obtain its mechanical response), one needs to have strain displacement relationship, stress and strain relationship (that is constitutive relationship), equilibrium condition and the geometry of the problem. The approach for elastic analysis of multi-layered structure was originally developed by Burmister. Various researchers have further extended the formulation (general enough to handle n layers), developed algorithms and performed numerical studies. Since it is possible to analyse multi-layered structure with various material behvaiour and geometry using efficient computational system in the present days, there may not be any need to estimate an equivalency factor between two layers made up of different materials, or the equivalent single layer strength of two or multiple layers, etc.
