Prediction Of Pavement Response Under Various Subgrade Modulus

During past decades; the mechanical analysis became principal discipline in pavement design. As a tool for verifying mechanical effect on pavement and subgrade, finite element method (FEM) is often chosen. By employing FEM; it is easy to estimate the pavement structure's response and stiffness of subgrade. In terms of pavement rehabilitation the subgrade performance is of great interest since the pavement structure is the most expensive item of a highway construction project. The aim is to establish the relationship between the stiffness of subgrade, the pavement and their contact surface by using FEM parametric study with varying the subgrade stiffness. The parametric study will use; 1) 10-node solid element and triangular mesh with refinement at load applying area, 2) seasonal moisture variation, 3) comparison between Korean; Hungarian, and AASHTO design criteria.