| 斜风下典型桥塔抖振性能的比较 |
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| 引用本文： | 周奇,朱乐东,郭震山.斜风下典型桥塔抖振性能的比较[J].东南大学学报(自然科学版),2009(Z2). |
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| 作者姓名： | 周奇 朱乐东 郭震山 |
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| 作者单位： | 同济大学土木工程防灾国家重点实验室;同济大学桥梁工程系;同济大学桥梁结构抗风技术交通行业重点实验室; |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目(2006AA11Z120) |
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| 摘 要： | 为了研究斜风中自立状态下桥塔的抖振性能,进行了倒Y型和钻石型桥塔的气弹模型试验,并对比分析了几种典型桥塔的抖振性能.试验结果表明:当桥塔横桥向结构为H柱时,抖振响应-风偏角曲线出现一个较明显波峰,且响应最大值出现在峰值处;当桥塔横桥向结构为独柱时,抖振响应-风偏角曲线变化较为平缓,没有明显波峰出现;当桥塔横桥向结构介于上述两者之间时,抖振响应-风偏角曲线出现一个波峰,但峰值较小.在不同紊流度和风速的流场下,桥塔抖振响应-风偏角曲线均具存在上述规律.同一风偏角下,桥塔抖振响应为风速二次曲线,但受涡振或驰振现象的影响.总之,斜风下典型桥塔抖振响应曲线与其横桥向结构形式、风偏角和来流风速有关,与紊流度无关.
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| 关 键 词： | 典型桥塔 抖振性能 结构形式 风偏角 紊流度 |
Comparison on buffeting performance of typical pylons under skew wind |
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| Zhou Qi, Zhu Ledong, Guo Zhenshan.Comparison on buffeting performance of typical pylons under skew wind[J].Journal of Southeast University(Natural Science Edition),2009(Z2). |
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| Authors: | Zhou Qi Zhu Ledong Guo Zhenshan |
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| Institution: | Zhou Qi1,2 Zhu Ledong1,2,3 Guo Zhenshan2,3(1 State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China) (2 Department of Bridge Engineering,China) (3 Key Laboratory for Wind Resistance Technology of Bridges of Ministry of Transportation,China) |
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| Abstract: | In order to study the buffeting performance of free standing pylons under skew wind,the buffeting responses of inverted Y-shaped and diamond-shaped pylons are investigated by wind tunnel tests and compared with those of other typical pylons.The experimental results show that when the pylon structure in transverse direction is an H-shaped column,a significant wave peak appears in the variation curve of the buffeting response to the wind skew angle(BA curve) and the maximum of the response is at the peak poin... |
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| Keywords: | typical pylon buffeting performance structure form wind skew angle turbulence intensity |
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