FINITE ELEMENT AND DISTRESS MODELS FOR GEOSYTHETIC-REINFORCED PAVEMENTS

A finite element (FE) response model has been developed to describe stress and strain response parameters for geosynthetic-reinforced flexible pavement systems where the geosynthetic is placed at the bottom of the unbound aggregate layer. The model contains membrane elements and an anisotropic linear-elastic material model for the geosynthetic inclusion. Elasto-plastic models are used for the asphalt concrete, base aggregate and subgrade layers. Principal response parameters extracted from the FE model include vertical strain in the top of the subgrade and bulk stress in the unbound base aggregate layer. These response parameters are used in empirical damage models for the prediction of long-term pavement performance and the definition of reinforcement benefit. Reinforcement benefit is defined in terms of an extension of service life of the pavement, a reduction in aggregate thickness for equivalent service life, or a combination of the two. The damage models are calibrated from reinforced and unreinforced pavement test sections. The model is shown to provide general descriptions of reinforcement mechanisms that are consistent with those previously observed in instrumented pavement sections.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/44544515
• Corporate Authors:

  Taylor & Francis

  4 Park Square, Milton Park
  Abingdon,   United Kingdom  OX14 4RN
• Authors:
  • Perkins, S W
  • EDENS, M Q
• Publication Date: 2002-12

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 239-250
• Serial:
  • International Journal of Pavement Engineering
  • Volume: 3
  • Issue Number: 4
  • Publisher: Taylor & Francis
  • ISSN: 1029-8436
  • Serial URL: http://www.tandf.co.uk/journals/titles/10298436.html

Subject/Index Terms

• TRT Terms: Asphalt concrete pavements; Distress; Finite element method; Geosynthetics; Material reinforcement; Pavements; Reinforced concrete pavements; Service life; Strain measurement; Stress ratio
• Subject Areas: Design; Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00942063
• Record Type: Publication
• Files: TRIS
• Created Date: May 12 2003 12:00AM