Evaluating Nonlinear Elastic Models for Unbound Granular Materials in Accelerated Testing Facility

The characterization of unbound granular materials is particularly important in thin-surfaced pavements where most of the bearing capacity is provided by the granular layers. For an accurate modeling of the elastic response of these materials, several important models described in the literature have been considered in a study. Three of the most-used nonlinear elastic models for unbound granular materials used by researchers and practitioners in the pavement engineering field are evaluated. The nonlinear elastic models of the materials were especially implemented in ABAQUS, a general purpose, three-dimensional finite element code (3D-FEM) that uses user-defined material subroutines. The 3D-FEM solutions were validated through a set of data collected in the full-scale Canterbury Accelerated Pavement Testing Indoor Facility (CAPTIF). Vertical, transverse, and longitudinal strains were measured at CAPTIF through an array of strain gauges buried at different depths in the pavement sections. The vertical stresses were measured by load pressure cells at different locations in the pavement sections. In general, the results obtained from the nonlinear models are considered good for the materials and structures studied in the research. Little difference in the accuracy of the nonlinear models was found.

• Record URL:
  https://doi.org/10.3141/1990-16
• 
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Evaluating+Nonlinear+Elastic+Models+for+Unbound+Granular+Materials+in+Accelerated+Testing+Facility&author=A.+Gonzalez&author=M.+Saleh&author=A.+Ali&publication_year=2007
• Availability:
  • Find a library where document is available. Order URL: http://www.trb.org/Main/Public/Blurbs/159316.aspx
• Authors:
  • Gonzalez, Alvaro
  • Saleh, Mofreh Fawzy
  • Ali, Adnan
• Publication Date: 2007

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 141-149
• Monograph Title: Pavement Management; Monitoring, Evaluation, and Data Storage; and Accelerated Testing 2007
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 1990
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accelerated tests; Bearing capacity; Finite element method; Granular materials; Modulus of elasticity; Pavement design; Pavement performance; Pavements
• Uncontrolled Terms: Accelerated pavement tests; Nonlinear elastic analysis; Pavement testing; Unbound granular materials
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 01046112
• Record Type: Publication
• ISBN: 9780309104159
• Files: TRIS, TRB, ATRI
• Created Date: Feb 8 2007 5:17PM