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Determination of Local Fatigue Model Calibration Used in MEPDG for Iran's Dry-No Freeze Region

Azadi, M ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1007/s13369-012-0340-0
  3. Publisher: 2013
  4. Abstract:
  5. Load-associated fatigue cracking is one of the major distress types occurring in flexible pavement systems. This paper identifies two important calibration factors for the dry-no freeze climatic region of Iran for use in the Mechanistic Empirical Pavement Design Guide (MEPDG). According to recent research, approximately 51~% of Iran's total land area is located in this region. Tehran, the capital of Iran, is located in this region and therefore three of its highways are selected for this research. The gathering of the data required for calibration is labor intensive because the data resides in various incongruent data sets. Spreadsheet templates specifically designed to manage the calibration data were used to collect pavement performance data from the Tehran municipality organization. Calibration factors were then derived by minimizing the differences between observed and predicted pavement performances. The pavement performance field data in some sections of three highways were employed for calibration initially, and the distresses predicted with these calibration factors were compared to pavement field performances in the other sections. These calibrated models in the MEPDG assure the reliable prediction of pavement distress and its symptoms, such as longitudinal and alligator cracks
  6. Keywords:
  7. Alligator cracks ; Fatigue model ; Iran ; MEPDG
  8. Source: Arabian Journal for Science and Engineering ; Volume 38, Issue 5 , October , 2013 , Pages 1031-1039 ; 13198025 (ISSN)
  9. URL: http://link.springer.com/article/10.1007%2Fs13369-012-0340-0