APADS: finite method software for enhanced pavement analysis including nonlinear behavior of granular materials

The current Austroads linear elastic model does not adequately allow an assessment of the modulus of individual granular bases to be considered in the design process due to the modulus stress-dependency. Whilst some allowance is currently made for the variation in modulus as the stresses change with depth below the surface, i.e. the Austroads sub-layering rules, the variation in granular moduli horizontally cannot be provided for in the current linear elastic model. This limits the ability of the Austroads model to predict responses and hence performance of thin bituminous surfaced pavements. In addition, improved methods are required to predict the deformation of granular bases. In July 2008, Austroads commissioned ARRB Group to develop an improved pavement response to load model, tailored for use in the routine design of flexible pavements, including unbound granular pavements and pavements that contain one or more bound layers. The developed response to load model is based on the finite element method, which allows for modulus stress-dependency in both vertical and horizontal directions. In addition, the finite element method can simulate a wide variety of nonlinear behaviour such as tension and shear failures, and material damage can all be treated within the finite element framework. The paper presents the modelling approach, material models used and numerical validation.

• Record URL:
  http://arrbknowledge.com
• Authors:
  • Bodin, D
  • Gonzalez, A
  • Jameson, G
  • Moffatt, M
  • Oeser, M
• Conference:
  • ARRB Conference, 26th, 2014, Sydney, New South Wales, Australia
• Publication Date: 2014-10

Language

• English

Media Info

• Pagination: 13p
• Serial:
  • Issue Number: 2.1

Subject/Index Terms

• TRT Terms: Base course (Pavements); Bituminous materials; Bituminous pavements; Granular soils; Pavement design; Pavement layers; Pavement performance; Pavements
• Uncontrolled Terms: Pavement technology
• Geographic Terms: Australia
• ATRI Terms: Basecourse; Bituminous pavement; Granular; Pavement design; Pavement layer; Pavement performance
• ITRD Terms: 2990: Basecourse; 9011: Design (overall design); 4107: Granular; 2952: Layer
• Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01548024
• Record Type: Publication
• Source Agency: ARRB
• Files: ITRD, ATRI
• Created Date: Dec 17 2014 10:51AM