AASHTO mechanistic-empirical pavement design guide parametric study.

Details

• Creators:
  Li, Ruipeng ; Cramer, Steven
• Corporate Creators:
  National Center for Freight and Infrastructure Research and Education (U.S.)
• Corporate Contributors:
  United States. Dept. of Transportation. Research and Innovative Technology Administration
• Subject/TRT Terms:
  • Concrete pavements
  • Thermal expansion
• Publication/ Report Number:
  CFIRE 03-24
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  National Center for Freight and Infrastructure Research and Education (U.S.)
• Abstract:
  This study focuses on assessing the robustness of the AASHTO Mechanistic-Empirical Pavement Design Guide (MEPDG v 1.1) for rigid pavement ; design projects in Wisconsin. The primary tasks conducted in this study included performing sensitivity analysis on MEPDG’s inputs for jointed ; plain concrete pavement (JPCP) design, evaluating the practicality of each input parameter’s sensitivity, determining the effects of using different ; concrete materials and different hierarchical levels of inputs on predicted JPCP performances, and identifying the limitations of the current MEPDG. ; It was found that the coefficient of thermal expansion and modulus of rupture had a strong impact on MEPDG predictions and these outcomes ; appeared consistent with conventional wisdom. The adverse effects of the concrete unit weight and the positive benefits of the widened concrete slab ; were suspected to have been overestimated by the MEPDG. It was verified that MEPDG predictions were significantly different depending on the ; concrete materials and hierarchical levels of inputs chosen. Therefore, the pavement designer was recommended to select the proper design strategy. ; The limitations of MEPDG were illustrated in that it did not account for the effects brought by the supplementary cementitious materials on the ; pavement design and it erroneously restrained the permissible range for concrete modulus of rupture input. Although a significant number of material ; inputs are possible with level 1 implementation of the MEPDG, these inputs are often used in a narrow context and are largely independent from other ; inputs and material properties. It cannot be presumed that the change in one input will lead to a full set of parametric changes that such a change ; would actually induce in practice.
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• Format:
  PDF
• Funding:
  DTRT06-G-0020
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25358/dot_25358_DS1.pdf
• File Type:
  [PDF - 779.85 KB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:fd12afa1e72ffca0961cbe6e9b07e7bfa88505d8706672a68cd541c835366323b256be9b62975bd4d19a171e268592d1e7fd8d9cd282692eccc76edf860d51c4