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

This study investigated the impact of the realistic constitutive material behavior of asphalt layer (both nonlinear inelastic and fracture) for the prediction of pavement performance. To this end, this study utilized a cohesive zone model to consider the fracture behavior of asphalt mixtures at an intermediate temperature condition. The semi-circular bend (SCB) fracture test was conducted to characterize the fracture properties of asphalt mixtures. Fracture properties were then used to simulate mechanical responses of pavement structures. In addition, Schapery’s nonlinear viscoelastic constitutive model was implemented into the commercial finite element software ABAQUS via a user defined subroutine (user material, or UMAT) to analyze asphalt pavement subjected to heavy truck loads. Extensive creep-recovery tests were conducted at various stress levels and multiple service temperatures to obtain the stress- and temperature-dependent viscoelastic material properties of asphalt mixtures. Utilizing the derived viscoelastic and fracture properties and the UMAT code, a typical pavement structure was modeled that simulated the effect of material nonlinearity and damage due to repeated heavy truck loads. Two-dimensional finite element simulations of the pavement structure demonstrated significant differences between the cases: linear viscoelastic and nonlinear viscoelastic modeling with and without fracture in the prediction of pavement performance. The differences between the cases were considered significant, and should be addressed during the process of performance-based pavement design. This research demonstrates the importance of accurate and more realistic characterizations of pavement materials.

• Record URL:
  http://files.library.northwestern.edu/transportation/online/unrestricted/2012/MATC-UNL-427.pdf
• 
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/25055
• Supplemental Notes:
  • This document is disseminated under the sponsorship of 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:
  • Kim, Yong-Rak
  • Ban, Hoki
  • Im, Soohyok
• Publication Date: 2012-3

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; References; Tables;
• Pagination: 67p

Subject/Index Terms

• TRT Terms: Asphalt pavements; Axle load force; Finite element method; Fracture properties; Pavement design; Pavement performance; Trucks; Viscoelasticity
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01454018
• Record Type: Publication
• Report/Paper Numbers: 25-1121-0001-427
• Files: UTC, NTL, TRIS, ATRI, USDOT
• Created Date: Nov 15 2012 12:33PM