Impact of Truck Loading on Design and Analysis of Asphaltic Pavement Structures-Phase II

In this study, Schapery’s nonlinear viscoelastic constitutive model is implemented into the commercial finite element (FE) software ABAQUS via user defined subroutine (user material, or UMAT) to analyze asphalt pavement subjected to heavy truck loads. Then, extensive creep-recovery tests are conducted at various stress levels and at two temperatures (30° C and 40° C) to obtain the stress- and temperature-dependent viscoelastic material properties of hot mix asphalt (HMA) mixtures. With the viscoelastic material properties characterized and the UMAT code, a typical pavement structure subjected to repeated heavy truck loads is modeled with the consideration of the effect of material nonlinearity with a realistic tire loading configuration. Three-dimensional finite element simulations of the pavement structure present significant differences between the linear viscoelastic approach and the nonlinear viscoelastic modeling in the prediction of pavement performance with respect to rutting and fatigue cracking. The differences between the two approaches are considered significant and should be addressed in the process of performance-based pavement design. This also implies the importance of proper and more realistic characterization of pavement materials.

• Record URL:
  • http://matc.unl.edu/assets/documents/finalreports/Kim_ImpactTruckLoadingDesignAnalysisAsphalticPavementstructuresPhaseII.pdf
• 
• Supplemental Notes:
  • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  Mid-America Transportation Center

  University of Nebraska-Lincoln
  2200 Vine Street, PO Box 830851
  Lincoln, NE  United States  68583-0851

  Research and Innovative Technology Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Ban, Hoki
  • Im, Soohyok
  • Kim, Yong-Rak
• Publication Date: 2011-2

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; Photos; References; Tables;
• Pagination: 64p

Subject/Index Terms

• TRT Terms: Asphalt pavements; Finite element method; Hot mix asphalt; Mathematical models; Overweight loads; Pavement cracking; Pavement design; Pavement performance; Paving materials; Repeated loads; Rutting; Viscoelasticity
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01502028
• Record Type: Publication
• Report/Paper Numbers: MATC-UNL: 321, 25-1121-0001-321
• Files: TRIS
• Created Date: Dec 23 2013 7:53AM