Abstract
In this paper, effects of tire loads and inflation pressures on predicted pavement responses were presented. The objective was to study the effect of increased tire loads and tire inflation pressures on predicted transverse strains and vertical strains at the different pavement layers and material properties. A 3 dimensional (3D) tire contact stresses for 6 different tires were interpolated from the database of the measured tire contact stresses. The shape of measured tire contact stresses is dependent on tire loading conditions. The results show that the predicted values were different near the asphalt concrete (AC) layer by increased tire inflation pressure. Under the increased tire load, the predicted values were different at the base and subgrade layer. From statistical analysis, predicted transverse strains at the bottom of asphalt layer and vertical strains at the top of subgrade are affected by different AC thicknesses, AC moduli, and subgrade moduli.
Highlights
The tire inflation pressure has been significantly increased compared to that of 1960 and 1970
5d the predicted transverse and vertical strains show no significant difference at the asphalt concrete (AC) layer, but the predicted strain is increased at the base and subgrade layers as the tire load increases. This finding indicates that the increased tire inflation pressure more likely affects the transverse and vertical strain near the AC surface layer and the increased tire load affects the transverse and vertical strain at the top of subgrade layer
The results suggest that the effects of the increased tire inflation pressure are mainly seen near the surface layer and diminish with depth and the effects of increased tire load are seen at the bottom layers
Summary
The tire inflation pressure has been significantly increased compared to that of 1960 and 1970. The results from the layered elastic program showed that a circular uniform pressure distribution overestimated tensile strains at the bottom of the asphalt layer and overestimated compressive strains at the top of the subgrade They studied the effects of tire pressures on pavement response, ISSN 1822-427X print / ISSN 1822-4288 online http://www.bjrbe.vgtu.lt and found that increased tire pressure can cause more fatigue cracking and rutting. The profiles of permanent deformation at WesTrack were simulated by elastic-viscoplastic constitutive model embedded in 3D FEM and measured tire contact stresses They investigated the effect of tire load on pavement response. A 3D FE analysis under 3D tire contact stresses was used to investigate the pavement response. 6 different tires and 2 different pavement structures were used to investigate the effects of tire loading conditions on pavement response
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