PROJECT-LEVEL STRUCTURAL EVALUATION OF PAVEMENTS BASED ON DYNAMIC DEFLECTIONS

The framework of a structural evaluation system for pavements, which is based on the mechanistic evaluation of dynamic deflection data, is described. The computer program RPEDD1 has been developed for the evaluation of dynamic deflection basins measured on rigid pavements by nondestructive testing devices (a falling weight deflectometer and a Dynaflect). The analysis models presented in this paper include (a) a self-iterative procedure to determine in situ moduli of pavement layers, assuming a layered linearly elastic medium; (b) a selfiterative procedure for determining nonlinear strain-dependent moduli of granular layers and subgrade; and (c) a procedure for predicting fatigue life and existing structural capacity. A methodology has been developed to eliminate any need for assuming initial values of moduli. This has also improved efficiency of the self-iterative basin matching procedure and ensured unique values of the in situ moduli. Implementation of the proposed computerized evaluation procedures also provides a rational way to delineate sections for rehabilitation design.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 37-45
  • Monograph Title: Nondestructive pavement evaluation and overlay design
  • Serial:

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Filing Info

  • Accession Number: 00452642
  • Record Type: Publication
  • ISBN: 0309038170
  • Files: TRIS, TRB
  • Created Date: Aug 27 2004 9:59PM