| 李遇春,邸庆霜,张文杰,张婷婷.多箱渡槽槽身静风三分力系数风洞试验研究[J].水利学报,2012,43(6): |
| 多箱渡槽槽身静风三分力系数风洞试验研究 |
| A wind tunnel test study on aerostatic coefficients of large scale multi-box aqueduct bridge deck |
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| 中文关键词: 多箱式渡槽 静风三分力系数 风洞试验 |
| 英文关键词: multi-box aqueduct aerostatic coefficients wind-tunnel test |
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| 摘要点击次数: 2092 |
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| 中文摘要: |
| 对6个多箱式渡槽槽身刚性测压模型进行了风洞试验研究，分别模拟了满槽、空槽以及不同风攻角的试验工况。根据试验结果得到了槽身模型的静风三分力（阻力、升力和扭矩）系数，讨论了模型风压分布以及三分力系数的变化规律。试验结果表明：（1）多箱式渡槽槽身绕流更趋近于钝体绕流；（2）槽身风荷载主要表现为风阻力；（3）阻力系数在总体趋势上随着槽截面宽高比的增加而减小。试验结果可为多箱渡槽的抗风研究与设计提供初步的参考。 |
| 英文摘要: |
| A wind tunnel test for the six scaled multi-box aqueduct decks （including 3 two-box and 3 three-box models） was conducted. The cases with full and without water，and with different wind attack angles are considered respectively. The drag， lift and pitching moment coefficients of multi-box aqueduct decks were obtained by the test result analyses. The surface pressure distributions and the aerostatic coefficients of the test models were displayed and discussed. The results show that：（1） The wind flow field around multi-box aqueduct deck is similar to that of blunt body；（2） The drag force is the most important wind load among the three static loads；（3） The drag coefficient decreases with the increasing of width/height ratio of aqueduct decks in the whole tendency. |
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