DETERMINING COMPOSITE MODULUS OF SUBGRADE REACTION BY USE OF THE FINITE-ELEMENT TECHNIQUE

A finite-element computer program for rigid pavement analysis was used to develop curves for composite modulus of subgrade reaction versus subbase thickness. Such curves are useful in expediting rigid pavement thickness design when the elastic properties and the thickness of the subbase are known. These newly developed curves were compared with similar curves published by the Portland Cement Association. Little agreement was found. Results of concrete pavement analyses that used the finite-element technique were compared with the results of identical analyses that used Westergaard's slab theory. The two methods show similar trends, although the finite-element technique appears to be siffer than Westergaard's theory. It was also found that the composite modulus of subgrade reaction depends on several variables, including slab thickness, modulus of elasticity of the subbase, and modulus of subgrade reaction.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 52-56
  • Monograph Title: Pavement design, performance, and rehabilitation
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00385689
  • Record Type: Publication
  • ISBN: 0309036208
  • Files: TRIS, TRB
  • Created Date: Jul 30 1984 12:00AM