Calibrating the MEPDG Permanent Deformation Performance Model for Different Maintenance and Rehabilitation Strategies

The different maintenance strategies available today are diverse in terms of their applicability to different pavement conditions. This research investigated the effect of different maintenance strategies on the bias correction factors necessary for the calibration of mechanistic-empirical pavement design procedures. Because each maintenance strategy is tailored to correct specific forms of distress, it can be expected that pavements that receive the right maintenance treatment will perform better than those that do not. The distress predictions are directly proportional to the value of the bias correction factors for the performance prediction model under study. A maintenance strategy proven effective in the field should have lower values for the different bias correction factors because of its ability to restrict the distress measurements to low levels. On the other hand, a maintenance strategy that has not been effective in controlling a certain distress mechanism will result in higher observed distress measurements that will translate to higher values for the different bias correction factors for the particular distress prediction model. In this study, a detailed analysis was undertaken to determine how sensitive the bias correction factors are to each of several selected maintenance strategies. The Mechanistic Empirical Pavement Design Guide (MEPDG), developed under the National Cooperative Highway Research Program (NCHRP 1-37A and 1-40D) was the main analysis tool for this investigation. The study was restricted to the permanent deformation performance models in the MEPDG. Results from this study have shown that the bias correction factors are indeed influenced by maintenance strategies. Therefore, calibration of pavement sections that have received some kind of maintenance work should be done after taking into consideration the diversity of maintenance work that has been done on them. Failure to do so will yield unrealistic pavement performance predictions.

Language

  • English

Media Info

  • Media Type: DVD
  • Features: References; Tables;
  • Pagination: 15p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01150944
  • Record Type: Publication
  • Report/Paper Numbers: 10-2355
  • Files: PRP, TRIS, TRB
  • Created Date: Jan 25 2010 11:05AM