新型复合结构倒Y塔架空气动力不稳定振动风洞试验研究

李毅佳; 王小盾; 余建星

doi:10.13204/j.gyjz201211023

新型复合结构倒Y塔架空气动力不稳定振动风洞试验研究

doi: 10.13204/j.gyjz201211023

1.
1. 天津大学建筑工程学院,天津 300072;
2.
2. 天津理工大学管理学院,天津 300384

详细信息

作者简介:
李毅佳,女,1978年出生,博士,讲师。E－mail:liyijia_tjut@126.com

中图分类号: U446.1
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- 文章访问数: 107
- HTML全文浏览量: 9
- PDF下载量: 96
- 被引次数: 0
出版历程
- 修回日期: 2012-05-20
- 刊出日期: 2012-11-20

WIND TUNNEL TEST ON AERODYNAMIC UNSTABLE VIBRATION OF INVERTED Y TOWERS OF NEW HYBRID STRUCTURE

1.
1. School of Civil Engineering,Tianjin University,Tianjin 300072,China;
2.
2. School of Management,Tianjin University of Technology,Tianjin 300384,China

摘要

摘要: 天津慈海桥是一种将斜拉桥和摩天轮合二为一的复合结构,为了综合理解和判断结构在风力作用下的动力特性,研究由于空气尾流作用引起的振动现象,建立复合结构的3种风洞试验模型。通过风洞试验测量,得到不同的风向与桥轴方向角度工况下的风力系数,并通过试验观察及数据分析对空气尾流振动现象发生的情况进行判断。试验及分析结果表明,在整体结构完成后不会发生空气不稳定振动现象,但在施工中只有主塔的情况下,如果共振风速与设计风速相近时,存在空气不稳定振动现象,可采取倒Y塔架间设置隔板的措施提高主塔的刚度,进而避免空气不稳定振动现象的发生。
- 风洞试验 /
- 复合结构 /
- 层风力系数 /
- 空气尾流振动
Abstract: Tianjin Cihai Bridge is a hybrid structure of new cable-stayed bridge with giant wheel．Three wind tunnel models of hybrid structure were established in order to comprehensively understand and judge the structure's dynamic characteristics of wind action,and to study the vibration phenomenon by air wake．With tunnel test,wind force coefficients from different wind angel between the directions of bridge axis were acquired,and through the experimental observation and data analysis the phenomenon of vibration by air wake was judged.The result shows that the phenomenon of vibration by air wake will not occur after completion of the overall structure,but in the construction of the main tower only,if the design wind speed is close to the resonant wind speed the phenomenon of vibration by air wake will occur．The measure of setting partitions between the inverted Y towers can be used to improve the stiffness of the main tower,and then to avoid the occurrence of unstable vibration by air wake．
- wind tunnel test /
- hybrid structure /
- local wind force coefficient /
- vibration by air wake

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参考文献(7)

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