Reliability-Based Approach for Using LTPP and APT Test Results for Estimating Fatigue Performance

Pavement performance prediction in terms of fatigue cracking and surface rutting are at the core of any mechanistically-based pavement design method. In particular, the estimation of the expected fatigue field performance of a flexible pavement section is based on the estimation of the maximum tensile strain at the bottom of the asphalt layers and its correlation to the performance of the same mix in the laboratory under bending beam test. This laboratory-based estimation is calibrated to better predict actual field performance by means of “shift factors”. Although several studies have been conducted to address the main variables affecting shift factors, none of them have been comprehensive and often are limited to assessing the effect of one variable at a time. The objective of this paper is to propose a reliability-based approach to develop a comprehensive methodology that can address the effects of the most significant variables on shift factors to calibrate accelerated pavement test (APT) performance to better match field performance as captured by the Long-Term Pavement Performance. The proposed methodology addresses what are currently considered the most important factors but recognizes that other important factors could have been neglected. The method, however, can be readily modified to incorporate any new variables as they are identified and quantified.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References; Tables;
  • Pagination: 16p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01043881
  • Record Type: Publication
  • Report/Paper Numbers: 07-2921
  • Files: TRIS, TRB
  • Created Date: Feb 8 2007 7:37PM