Asset management

Cover of Measurement and Analysis of Dynamic Wheel Loads
Measurement and Analysis of Dynamic Wheel Loads
  • Publication no: AP-R406-12
  • ISBN: 978-1-921991-27-1
  • Published: 30 May 2012

This report explores the dynamic forces that heavy vehicles apply to road pavements and the effects that these forces have on pavement performance. The research focussed on identification of accurate and cost effective means to quantify dynamic forces applied by current and new generation heavy vehicle trailers. The traditional method of using axle mounted strain gauges with accelerometers was found to be more cost effective, accurate and practical compared to the alternative measurement methods trialled.

Data collected during the field trials is available and may be suitable for further analysis to continue investigations into the relationships between dynamic wheel loads and vehicle or road characteristics. However, for most of the relationships of interest, a wider sample of vehicles and roads is required to establish sufficient evidence of the nature of the relationships. In particular, it may be of interest to further investigate differences between mechanical- and air-suspended combinations.

  • 1.1. Background
    • 1.1.1. Project AT1212
  • 1.2. Project Objectives (AT1480)
  • 1.3. Report Structure
  • 2.1.1. Wheels and Tyres
  • 2.1.2. Vehicle
  • 2.1.3. Facilities
  • 2.1.4. Road Sections
  • 3.1. Repeatability Testing at ALF
    • 3.1.1. ALF Instrumentation
    • 3.1.2. Test Procedure
    • 3.1.3. Results
  • 3.2. Laser Bench Tests
  • 3.3. Field Trial and Results – Laser and Strain Gauge Measurements – March 2009
    • 3.3.1. Instrumentation
    • 3.3.2. Results and Findings
  • 3.4. Further Refinements to the Laser Transducers
    • 3.4.1. Laser Fidelity Tests
    • 3.4.2. Laser Rig Tests
    • 3.4.3. Field Testing and Design Changes
  • 3.5. Discussion and Conclusions
  • 3.6. Consideration of Airbag Pressure Measurement in Estimating Dynamic Wheel Load
    • 3.6.1. Dynamic Wheel Load Estimation from Airbags, without Measuring Hanger Displacement
    • 3.6.2. Contributions to Dynamic Wheel Load Force Measurements
  • 3.7. Summary of Findings for Development of a Method of Measuring Dynamic Wheel Loads
  • 4.1. May 2010 Test Program
    • 4.1.1. Vehicles
    • 4.1.2. Instrumentation
    • 4.1.3. Analysis of Results
  • 4.2. March 2011 Test Program
    • 4.2.1. Test Vehicle
    • 4.2.2. Loading Configurations
    • 4.2.3. Test Results