USAGE OF PEDESTRIAN FOOTBRIDGES

Previous work has indicated that water and wet conditions, as well as ambient temperature, have great significance for tyre wear. Speed and road alignment also produce significant effects. Abrasion is caused by slip. An expression derived in 1961 related tyre wear to temperature, tyre elasticity and rigidity, and slip. No consideration was given to fatigue. Recent American experiments on forestry vehicles derived an expression relating tyre wear to friction due to slip. The expression first referred to assumes that slip acts in one dirrction only. An expression is given which takes account of the two-dimensionality of slip. A model has been constructed relating tyre wear to vehicle and road parameters, the assumptions being that (1) speed is constant, (2) vehicle exactly follows road alignment, (3) there are no transient phenomena. Tests have been carried out on a 10 km road section to validate this model. However, results were unsatisfactory because (1) measurements were made on roads characterised by maximum values of radius and gradient, no consideration being given to distribution of these; (2) abrasion constant is temperature dependent; (3) the vehicle had to turn at the end of each test--the wear due to this could not be determined. Proposals are put forward for further simulations. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
• Corporate Authors:

  Swedish National Road and Transport Research Institute (VTI)

  Linköping,   Sweden  SE-581 95
• Authors:
  • Ohlsson, E
  • LIDSTROEM, M
• Publication Date: 1982

Language

• Swedish

Media Info

• Features: References;
• Pagination: 13 p.
• Serial:
  • Traffic Engineering & Control
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Abrasions; Alignment; Field tests; Friction; Mathematical models; Mechanical elasticity; Moisture content; Motor vehicles; Slip (Fluid mechanics); Speed; Stiffness; Suburbs; Temperature; Tires; Traffic speed; Validity
• Uncontrolled Terms: Slips; Wet conditions
• ITRD Terms: 2894: Alignment; 6473: Mathematical model; 5408: Speed; 6722: Temperature; 6288: Test method; 1381: Tyre; 4355: Water; 5293: Wear; 3015: Wet road
• Subject Areas: Design; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00381202
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS
• Created Date: Apr 30 1984 12:00AM