STUDY ON RESIDUAL DEFORMATION OF GRADED AGGREGATE BASE IN FLEXIBLE PAVEMENT BY USING ABAQUS SOFTWARE

Abstract

This article presents deformation characteristics and the residual deformation behavior of the graded aggregate base in the flexible pavement under changes of load and elastic modulus of the material layers. The finite element model is presented by using software Abaqus in order to simulate and analyze the influence of several parameters on the accumulating residual deformation of the aggregate layers. The result of the analysis data shows that, when reducing the dynamic elastic modulus of the surface layers or the elastic modulus of the foundation layers, the residual deformation in the graded aggregate base increases a certain amount about (30÷40)%, but when increasing the pressure of wheel acting on the road surface, the residual deformation in the graded aggregate base will increase rapidly about (80÷180)%. Therefore, this is a criterion that should be seriously considered and strictly controlled when designing pavements. The results can be used as the reference database for the calculation, design, and exploitation of this pavement.