Pavement Response to Variable Tyre Pressure of Heavy Vehicles

Abstract

Abstract. In recent years, the effect of overinflated tyre pressure and increased heavy vehicles' axle load on flexible pavements has become a subject of great concern because of the higher stress levels induced and damage caused to road pavements. This paper aims to evaluate the effect of variable tyre inflation pressures (using actual tyre contact/footprint area) to determine the responses of flexible pavement. A full scale experiment was conducted on a heavy vehicle with 1:1:2 axle configuration, 10 R 20 tyre size and attached trailer with constant axle load. Measurements were made for actual tyre-pavement contact area. KENPAVE linear elastic program was then used to analyse the effects of the measured actual tyre-pavement contact area and the results was compared using conventional circular tyre contact area. A comparative analysis was then made between the actual contact area and the conventional circular tyre contact area. It was found that high tyre inflation pressure produce smaller contact area, giving more detrimental effect on the flexible pavement. It was also found that the temperature of tyres when the heavy vehicles are operational give less significant impact on tyre inflation pressure for the Malaysian climate.

Contribution to Research of Specific Pressure Between Tire and Road in Motor Vehicles

“…Minimization of the objective function was performed by the optimization method, whose block diagram is shown in Figure 6. The method itself is described in detail in [10][11][12][13].…”

“…The relationship between the tires and the deformable surface is especially emphasized. In [10], the authors point out the importance of research of the relationship between the tire and deformable ground in trucks. A method for measurement of tire footprints on deformable ground and a software for data analysis have been developed.…”

“…Block diagram of the optimization methodIn this particular case, the Hooke-Jeeves method was used for optimization. During the process of parameter identification, penal functions[18] were used, with the introduction of limits of the parameter values and with the criterion of interrupting the iteration process of the Hooke-Jeeves method of10 10  .…”