Backcalculation of Airfield Pavement Structures Based on Wave Propagation Theory

Nondestructive testing equipment called FWD (Falling Weight Deflectometer) has been widely utilized for structural evaluation of pavement. This paper presents backcalculation of multilayered pavement layer parameters from FWD tests by using dynamic backcalculation software which authors have recently developed. The theoretical solution for a system of axisymmetric wave propagation equations was developed using Hankel transform in radial direction and Fast Fourier Transform in time domain and was implemented into this backcalculation software. This software is called Wave_BALM (Wave propagation based Back Analysis for Layer Moduli). The viscoelastic model used herein is called the Voigt solid (or Kelvin solid). The validity of this software was examined by using FWD time history data of airfield pavement provided by Federal Aviation Administration (FAA). Reliability of the results was confirmed by the following observations, 1) Backcalculation was conducted by using fifty sets of randomly generated seed values and the variation of the results was found small. 2) Excellent agreement between computed and measured deflections is confirmed.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 17p
  • Monograph Title: 2010 FAA Worldwide Airport Technology Transfer Conference: Next Generation of Airport Technology

Subject/Index Terms

Filing Info

  • Accession Number: 01608112
  • Record Type: Publication
  • Files: TRIS, ATRI, USDOT
  • Created Date: Aug 8 2016 10:21AM