TYRE- PAVEMENT CONTACT PATTERNS AND AREAS, RELATIVE PAVEMENT DEFLECTIONS AND EQUIVALENT LOADINGS FOR SOME LOW LOADER AND OFF-THE-ROAD TYRES

The report details some testing done as part of an examination into the relative pavement damaging effect of low loader, truck and "off-the-road" vehicle tyres. As studies by others have concentrated on normal truck tyres, this study examined low loader and "off-the-road" vehicle tyres. Details of the tyre-pavement contact patterns and the surface deflection of a pavement under loaded wheels are given. For some of the wheels the details cover a range of loadings. The contact patterns are reproduced in the report. The tyre-pavement contact envelopes (i.e. the area enclosed by a smooth curve through the extremities of the contact points) range from approximate circles to elongated rectangles with a length of up to 2.2 x width. The theoretical contact area (load divided by pressure) is found to be a poor predictor of the actual contact area. The ratio of the theoretical to envelope areas varied between 0.6 and 1.5. Multi-layer linear elastic analysis indicates that changes of this magnitude have a marked effect on surface deflection. The equivalent axle load (i.e. the load on the axle which gives the same pavement surface deflection as a standard 80 kn dual 10.00-20 tyred axle) is determined for the axles examined. The use of the results in comparing the relative damaging effect of low loader, truck and "off-the-road" tyres is the subject of ARRB report AIR 000-152. (Author/TRRL)

  • Corporate Authors:

    ARRB Group Limited

    500 Burwood Highway
    Vermont South, Victoria    3133
  • Authors:
    • WIDDUP, JDA
  • Publication Date: 1980-9

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 38 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00331451
  • Record Type: Publication
  • Source Agency: ARRB Group Limited
  • Report/Paper Numbers: AIR 000-161 Monograph
  • Files: ITRD, TRIS
  • Created Date: Oct 28 1981 12:00AM