Comparing Results of Airport Concrete Slabs Design Using Damage Models of FAARFIELD to MEPDG Concrete Fatigue Model

The current but still new design method for airport pavements of Federal Aviation Administration (FAA) deals with the pavement damage by using a two-stage degradation model for the concrete slabs which have been completely rewritten. Nowadays is being discussed the need of a “three-stage” model of failure. This one inserts a new and very important stage, with starts at the crack initiation and end at the first full-depth crack. But FAARFIELD is using the two-stage model, with some modifications for stabilized bases. The two-staged model consists into two clear periods, with the first beginning when the slabs are new and ending at the developing of first full-depth crack (Brill). The second period starts at this point and goes until the end of pavement service life. In other words, the three-stage model subdivides the first stage into two smaller ones, whose effects are different in the pavement life. The degradation model in question uses the Structural Condition Index (SCI) and is directly related to the traffic coverage of airplanes during the design period; such as an index is field-performance related taking into account distresses like corner breaks, linear cracks, shattered slabs, shrinkage cracks and joint and corning spalling, presenting at most three levels of severity. Such approach, clearly semi-empirical, differs from traditional fatigue degradation approach used widely by road agencies for the design of concrete pavements, when concrete fatigue transfer-functions refer to a first and catastrophic crack. This paper deals with such a difference for the crack criteria, were it seeks to understand the different results on using a concrete fatigue transfer function proposed by the American Association of State Highway and Transportation Officials (AASHTO), namely mechanistic-empirical pavement design guide (MEPDG) criteria, for the fatigue design of airport concrete slabs alternatively to the 2-stage FAA criteria. The purpose of comparison of FAA failure model to MEPDG fatigue semi-empirical transfer function was carried out by simulating the commercial airplane traffic mix actually obtained from John F. Kennedy International Airport data for the period from 2000 to 2001.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 16p
  • Monograph Title: 2014 FAA Worldwide Airport Technology Transfer Conference Proceedings: Innovations in Airport Safety and Pavement Technology

Subject/Index Terms

Filing Info

  • Accession Number: 01538311
  • Record Type: Publication
  • Report/Paper Numbers: P10049
  • Files: TRIS, ATRI, USDOT
  • Created Date: Sep 9 2014 6:27AM