Dynamic Time Domain Backcalculation of FWD Data

A dynamic finite element method is incorporated with an optimization approach to develop a time domain backcalculation program, and it is used to backcalculate and predict the dynamic response of the FWD test from LTPP test sections. The advantage of a time domain analysis is that it can use the time history data directly and is less affected by the error data and the coupling effect between the sensor and asphalt concrete. The predictor-corrector form of Newmark scheme is used for the time integration of the dynamic system, and the pattern search approach of optimization is adopted to perform the backcalculation analysis. First, the backcalculations based on the synthetic data generated by the dynamic finite element program show a good agreement between the predicted and given material properties. Then, the backcalculation is performed to analyze two sets of FWD data collected in the field from the LTPP database; the difference between the prediction and measurement is small. Finally, the backcalculation properties are used to predict the dynamic response of the FWD test in which the deflection time history is from different drop weight; the results show that the predictions and test results agree very well.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780874141597
• Corporate Authors:

  University of Iowa, Iowa City

  Department of Civil and Environmental Engineering
  Iowa City, IA  United States  52242
• Authors:
  • Liu, Ming-Lou
  • Chuang, Yi-Fang
  • Chuang, Jui-Chang
• Conference:
  • Fifth International Conference on Maintenance and Rehabilitation of Pavements and Technological Control (MAIREPAV5)
  • Location: Park City UT
  • Date: 2007-8-8 to 2007-8-10
• Publication Date: 2007

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 175-180
• Monograph Title: International Conference on Maintenance and Rehabilitation of Pavements and Technological Control (MAIREPAV5), Fifth Proceedings

Subject/Index Terms

• TRT Terms: Asphalt concrete; Backcalculation; Databases; Falling weight deflectometers; Finite element method; Pavement performance; Time domain analysis
• Identifier Terms: Long-Term Pavement Performance Program
• Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 01130052
• Record Type: Publication
• ISBN: 9780874141597
• Files: TRIS
• Created Date: Jun 17 2009 12:07PM