Numerical Modeling of a Roller Compacted Concrete Pavement Under Vehicular Loading

Calculating the optimal thicknesses of the different structural layers of pavement is the main objective of pavement design. Rigid pavement design, therefore, where most of the load carrying capacity is taken by the rigid slab, consists of determining the right slab thickness. Part of the family of rigid pavements, roller compacted concrete (RCC) pavements are mainly designed and analyzed using existing methods for jointed plain concrete pavements. The Westergaard analytical solution, which determines the mechanical response of a concrete slab under vehicular loading based on many simplifying assumptions, forms the primary basis for these methods. In this study, the finite element (FE) software package ABAQUS was used to develop a three dimensional (3D) numerical model of an RCC pavement. Several aspects that cannot be treated by available analytical solutions are treated by the model. The base layer and the support subgrade, in fact, are treated by the model as solid elements. The real contact at the interfaces is simulated through use of friction coefficients; and a non-linear behavior law is used to model the concrete material. There was analysis of the model pavement under a 60kN single tire load with a 740kPa tire pressure applied at three different locations, namely pavement center, pavement edge, and pavement corner. Three dimensional FE model results were compared with those of other methods, such as the Portland Cement Association procedure and closed-form formulas. Comparison showed slower calculated stresses and higher calculated displacements are given by the FE model. The authors conclude that a reliable method for the calculation of stresses and displacements in RCC pavements is 3D FE modeling.

  • Availability:
  • Authors:
    • Zdiri, Mustapha
    • Abriak, Nor-edine
    • Ouezdou, Mongi Ben
    • Loulizi, Amara
    • Neji, Jamel
  • Publication Date: 2009-9

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01145283
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 5 2009 7:19PM