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

Details

• Creators:
  Im, Soohyok ; Ban, Hoki ; Kim, Yong-Rak
• Corporate Creators:
  Mid-America Transportation Center
• Corporate Contributors:
  United States. Department of Transportation. Research and Innovative Technology Administration ; United States. Department of Transportation. University Transportation Centers (UTC) Program
• Subject/TRT Terms:
  • Asphalt concrete pavements
  • Asphalt concrete
  • Asphalt mixtures
  • Finite element method
  • Structural analysis
  • Nonlinear equations
  • Fracture properties
  • Performance evaluations
  • Performance measurement
  • Performance tests Asphalt pavement
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• Publication/ Report Number:
  25-1121-0001-427
• Resource Type:
  Tech Report
• Geographical Coverage:
  Nebraska
• Edition:
  Final report; July 2010-Mar. 2012.
• Corporate Publisher:
  Mid-America Transportation Center
• Abstract:
  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.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25055/dot_25055_DS1.pdf
• File Type:
  [PDF - 1.89 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:c3c370ecaeb39c485c9b96b11b23af371b4a138529ab9adea51617f167dfe32040c4e3020353624647bfc5136e0961af4c4f5434428ff1790afa34391d58fe57