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| Received:October 11, 2014 Revised:December 02, 2014 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201602018 |
| KeyWord:asphalt pavement large longitudinal slope water film thickness hydrodynamic pressure hydroplaning of tire |
| Author | Institution |
| 滕旭秋 |
兰州交通大学 土木工程学院, 兰州 |
| 王海峰 |
兰州交通大学 土木工程学院, 兰州 |
| 文华 |
兰州交通大学 土木工程学院, 兰州 |
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| Abstract: |
| The traffic accidents often occur easily at the asphalt pavement with large longitudinal slope in rainy regions when it rains.In this paper,the mechanics model of hydrodynamic pressure for asphalt pavement is established based on momentum theorem.On this basis,the influence of vehicle speed,vehicle load,and longitudinal slope on hydrodynamic pressure are analyzed systematically.The results showed that:when the thickness of water film is lower than 3 mm,hydrodynamic pressure increases with the increment of speed and vehicular load.At the same time,hydrodynamic pressure increases with the increment of the longitudinal slope in upgrade section and decrease with the increase of longitudinal slope in downgrade section.When the thickness of water film is greater than 3 mm,hydrodynamic pressure increases with the increment of speed and vehicular load.The hydrodynamic pressure increases with the increment of the longitudinal slope in upgrade section,but it will first slowly increase and then slowly decrease with the increase of the longitudinal slope in downgrade section.The hydrodynamic pressure increases with the increment of tire radius whether upgrade or downgrade section.This paper provides the theoretic basis of the reason that traffic accidents occur easily in the asphalt pavement with the large longitudinal slope in the rainy region when the vehicle speed is high. |
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