IMPROVING THE DISTRIBUTION AND REDUCING THE MAGNITUDE OF PAVEMENT DAMAGE

An analytical study was conducted for both flexible and rigid pavements to evaluate different schemes for improving the distribution and reducing the magnitude of pavement damage. In the analysis of flexible pavement, the layered elastic theory was used to compute the pavement response. The horizontal strain at the bottom of the asphalt and the vertical strain at the top of the subgrade were used to predict the number of allowable strain repetitions. For the rigid pavement, finite difference, layered elastic theory, and Westergaard procedures were all used to compute tensile stresses in concrete that formed the basis for predicting allowable stress repetitions. By using a form of cumulative damage, as defined by the equation D = Sigma n/N where D = cumulative damage factor, n = applied stress or strain reptitions, and N = allowable stress or strain repetitions, different factors affecting pavement damage were considered. It was concluded that for flexible pavement the only effective means to reduce pavement damage was to modify the wheel assembly to reduce stress or strain at the critical locations in the pavement systems. The most effective modification would be to increase the spacing between duals. For rigid pavements, the edge effect was critical, thus suggesting that modifications to shift the loading away from the pavement edge would be effective. (FHWA)

  • Corporate Authors:

    U.S. Army Waterways Experiment Station

    Geotechnical Laboratory, 3909 Halls Ferry Road
    Vicksburg, MS  USA  39180-6199

    Federal Highway Administration

    Engineering Research and Development Bureau, 1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Barker, W R
    • Chou, Y T
  • Publication Date: 1980-8

Media Info

  • Pagination: 68 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00325957
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA RD-80-025 Final Rpt.
  • Contract Numbers: DOT-FH-7-3-0067
  • Files: TRIS, USDOT
  • Created Date: Mar 12 1981 12:00AM