EVALUATION OF STRAIN IN ASPHALT MIXTURE LAYER UNDER LOW-SPEED HEAVY WHEEL LOADING
2006
In the current design of asphalt pavement in freight container yard, theoretical design method based on multi-layered elastic analysis is applied. Fatigue criteria of subgrade generally become critical under the heavy wheel loads, however, considerable large strain observed in asphalt mixture layer in real scale tests. In this study, the effect of strain rate, slide between layers and tire contact pressure on the strain in asphalt mixture layer was discussed. It was concluded that the strain in asphalt mixture under low-speed heavy wheel loading is properly obtained by multi-layered elastic analysis, when the effect of strain rate, slide between layers and tire contact pressure appropriately considered.
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