THREE-DIMENSIONAL PHOTOELASTIC STUDY OF REFLECTION CRACKS IN FLEXIBLE PAVEMENTS

The stress state near cracks and the stability of the cracks under traffic loads are studied by means of a three-dimensional photoelastic model test. The materials, (which have various elastic modulus), used for the pavement model are epoxy resin mixed with a varying amount of high polymer. The model scale is 1/20. The traffic load on the model is transferred by means of a round plate on which a concentrated force is applied. Isochromatic and isoclinic lines are observed in order to analyse the state of the stress in the models. The result shows that after the bottom of the pavement cracks, it is likely for the cracks to propagate 30-40 degrees deviating from their central lines, and then to reflect to the surface entirely. (a) for the covering abstract of the conference see IRRD abstract no 823365.

• Availability:
  • Find a library where document is available. Order URL: http://www.worldcat.org/oclc/475160073
• Authors:
  • Lui, Y H
  • Zhang, O S
• Conference:
  • TRANSPO '89: International Conference & Exhibition on Road Transport
  • Location: Beijing , China
  • Date: 1989-5-7 to 1989-5-10
• Publication Date: 1989

Media Info

• Pagination: p. 75-80
• Monograph Title: Academic conference proceedings, Transpo '89

Subject/Index Terms

• TRT Terms: Conferences; Cracking; Loads; Mathematical models; Pavements; Photoelasticity; Scale models; Stresses; Structural models; Weighing devices
• Uncontrolled Terms: Scale
• Subject Areas: Bridges and other structures; Highways; Pavements;

Filing Info

• Accession Number: 00499321
• Record Type: Publication
• Source Agency: Transport Research Centre (CDV)
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM