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| Dynamics Response Characteristics of LongLife Asphalt Pavement under Different Axial Load and Movement State |
| LI Ting-Ting-1, 2 |
| (1. Highway School, Chang’an University, Xi’an 710019, China； 2. Department of Highway Engineering, Shaanxi College of Communication Technology, Xi’an 710072, China) |
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Abstract Based on the typical construction of long-life asphalt pavement, a simplified three-dimensional dynamics model was built up. The axial loads of light, middle and heavy type of vehicles were considered. Numerical simulation was applied to study the response of dynamics parameters in the function layers with inducting the movement state of steady or brake. The computational results show that the horizontal stress and strain are concentrated near the edge of the load circle, while the vertical displacement occurrs inside the load circle. The horizontal load induced by brake will enhance the concentrating of horizontal stress and strain, but its effect on vertical strain and displacement is limited. The vertical load is the most important factor to test the performance of the pavement, which plays dominate role in determining vertical strain and displacement.
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Received: 15 October 2010
Published: 30 May 2011
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