The primary response model programmed in the VESY II-M pavement design and analysis structural subsystem provides for the solution of a three-layered viscoelastic pavement system only. This report modifies this primary response model by extending the solution for stresses, strains, and deflections, to an N-Layered viscoelastic system for any value of Poisson's ratio. An approximate probabilistic solution for the N-Layered viscoelastic system is also presented in closed form. A rut-depth prediction model which uses simplified laboratory characterization tests is developed. The resulting pavement design and analysis models are structured into a set of modular subsystems which provide for easy replacement and incorporation of improved components in any one of the subsystems. An initial concept to optimize the procedure for the design of flexible pavement systems is also presented. The primary response model for the N-Layered pavement system developed in this report has been incorporated into the VESY II-M computer code. This modified code, known as VESYS G, is presented in FHWA-RD-77-117, "VESYS G--A Computer Program for Analysis of N-Layered Flexible Pavements," Georgia Institute of Technology, James S. Lai, April 30, 1977. /FHWA/

  • Supplemental Notes:
    • Sponsored by the Department of Transportation, Federal Highway Administration.
  • Corporate Authors:

    University of Utah, Salt Lake City

    Department of Civil and Environmental Engineering
    122 South Central Campus Drive
    Salt Lake City, UT  United States  84112
  • Authors:
    • Hufferd, W L
    • Lai, J S
  • Publication Date: 1978-1

Media Info

  • Pagination: 220 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00185262
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-78- 22 Final Rpt., FCP 35C3-142
  • Contract Numbers: DOT-FH-11-8109
  • Files: NTIS, TRIS, USDOT
  • Created Date: Feb 27 1979 12:00AM