Impact of Design Load Parameters on Road Pavements

The article is devoted to theoretical and experimental studies of the impact parameters of truck wheels on road pavements. Modern systems of air temperature, tire pressure, and axle load monitoring are analyzed and selected. Monitoring of these parameters is carried out during the truck motion on roads at various speed and in different climatic conditions. Changes in the tire temperature and pressure are identified depending on operating conditions. A comparison is made between the actual and calculated internal tire pressure. It is found that the experimentally obtained internal tire pressure significantly exceeds that used in the pavement design. Further research aims at improving the pavement design methodology. Purpose : The aim is to analyze and experimentally evaluate the impact load of truck wheels on the road surface to clarify the calculated pressure, contact patch size and temperature dependencies. Methodology : The analysis of modern systems for monitoring changes in air temperature, tire pressure and axle loads, full-scale experiments at various speed and in different climatic conditions. The above parameters are monitored while a truck moves on roads. Research findings : Temperature and tire pressure changes are identified depending on operating conditions. The internal tire pressure is compared to calculated ones. It is shown that the traditional approach, which assumes constant internal tire pressure, does not correspond to real driving conditions. It is found that actual values of internal tire pressure significantly exceed the calculated values used in the road pavement design. Value : Research fields are proposed to improve the methodology for calculating road pavements, taking into account actual parameters of the live load.