附属物对高层建筑局部风压的影响规律研究

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摘要探究了表面水平隔板对高层建筑局部风压的影响。对4种具有不同形式表附属物的高层建筑进行了刚性模型测压试验，并与无附属物的高层建筑测压结果进行对比。通过各立面上的平均风压与脉动风压系数以及极值风压系数的对比分析，结果表明：表面附属物对迎风面的正风压系数影响很小，但能够大幅削减侧风面上的负风压系数，尤其是负极值风压系数；且这种削减效果随附属物水平间距的减小而增强，建筑侧风面迎风向上部角区的极值风压最大削减幅度可达37%。侧风面脉动风压概率密度分布及非高斯特性研究表明：表面附属物能够减小较大负压的概率密度函数的偏度与峰度，从而削弱其非高斯特性，这种作用随附属物水平间距的减小而增强，表明附属物能够有效抑制来流在侧风面的分离。
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	袁珂1
	张小平2
	回忆3
	陈政清1

关键词 ：高层建筑, 表面附属物, 风洞试验, 局部极值风压

Abstract：This paper explores the influence of surface horizontal partition on the local wind pressure of high-rise buildings. In this paper, rigid model pressure tests were carried out on four kinds of high-rise buildings with different forms of surface appendages, and the pressure measurement results were compared with those of high-rise buildings without appendages. The average wind pressure on each facade, the fluctuating and the peak wind pressure coefficient were analysed. The results show that the surface appendages have little influence on the positive wind pressure coefficient on the windward side, but can greatly reduce the negative wind pressure coefficient on the side wind surface. especially the negative peak wind pressure coefficient; And this reduction effect increases with the decrease of the horizontal spacing of the appendages, and the maximum reduction of the extreme wind pressure in the windward higher leading corner of the side wind surface can be up to 37%. The study on the probability density distribution and non-Gaussian characteristics of the fluctuating wind pressure on the side wind surface shows that the surface appendages can reduce the skewness and kurtosis of the probability density function of the larger negative pressure, thus weakening its non-Gaussian characteristics. this effect increases with the decrease of the horizontal spacing of the appendages, indicating that the appendages can effectively restrain the separation of the incoming flow on the side wind surface.

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Key words： high-rise building surface appendages wind tunnel test local peak pressure

收稿日期: 2018-10-16 出版日期: 2020-03-28

引用本文:

袁珂1，张小平2，回忆3，陈政清1. 附属物对高层建筑局部风压的影响规律研究[J]. 振动与冲击, 2020, 39(7): 202-208.
YUAN Ke1， ZHANG Xiaoping2， HUI Yi3， CHEN Zhengqing1. Study on the influence of appendages on local wind pressure of high-rise buildings. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(7): 202-208.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I7/202

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