Superiority of dynamic backcalculation of FWD time series data

A falling weight deflectometer (FWD) is widely used to make pavement structural evaluation. It is dynamic testing equipment which applies impulse force at a surface of pavement and measures surface deflections. However, only peak load and peak surface deflections are commonly recorded. And by regarding them as pseudo-static load and deflections, static backcalculation is employed to estimate layer moduli. Static backcalculation disregards rich information that time series data may possess. This paper presents backcalculated results of all layers from time series data. Also it demonstrates that dynamic backcalculation can estimate the modulus and damping coefficient of all layers from even a set of load and deflection time histories at one location.

• Authors:
  • Terada, T
  • Horiuchi, S
  • Takeuchi, Y
  • Nishizawa, T
  • Himeno, K
  • Maruyama, T
  • Matsui, K
• Conference:
  • Seventh International Conference on Maintenance and Rehabilitation of Pavements and Technological Control
  • Location: Auckland , New Zealand
  • Date: 2012-8-28 to 2012-8-30
• Publication Date: 2012-8

Language

• English

Media Info

• Pagination: 10p
• Serial:
  • Issue Number: 00091

Subject/Index Terms

• TRT Terms: Backcalculation; Data analysis; Deflectometers; Dynamic loads; Loads; Pavement layers; Pavements; Tests for suitability, service and quality
• Uncontrolled Terms: Pavement technology
• ATRI Terms: Back calculation; Data analysis; Deflectometer; Dynamic loading; Load; Pavement layer; Pavement testing
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 01455725
• Record Type: Publication
• Source Agency: ARRB
• Files: ATRI
• Created Date: Nov 30 2012 2:51PM