海边坡角可调试验房风荷载现场实测研究

王旭;黄鹏;顾明

振动与冲击 ›› 2012, Vol. 31 ›› Issue (5) : 176-182.

PDF(3007 KB)
PDF(3007 KB)
振动与冲击 ›› 2012, Vol. 31 ›› Issue (5) : 176-182.
论文

海边坡角可调试验房风荷载现场实测研究

  • 王旭,黄鹏,顾明
作者信息 +

Field investigation of the wind loads on Test Building with adjustable roof pitch by the sea

  • WANG Xu, HUANG Peng , GU Ming
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摘要

在东海边上海浦东国际机场附近建造了一栋坡角可调的低矮房屋及测风塔,以对海边附近的风场特性及低矮建筑屋盖表面风压特性进行研究。该变坡房最大特点是屋盖坡角可以在0~30°之间自由调节,以便分析坡角变化对屋盖表面风压的影响。本文首先分别对0°、10°及20°屋盖坡角下选取的10分钟风压时程信号进行了分析,并与1:30刚性测压风洞试验相应结果进行了对比,表明屋盖表面平均及脉动风压分布与风洞试验结果吻合较好。其次,对风速、风向角的平稳性及其之间的相关性进行了分析,说明风速与风向角之间耦合作用明显,尤其竖向风向角对风速脉动影响较大,时间滞后为0时两者之间相关系数接近-0.5。最后,对屋盖表面风压信号的非高斯特性进行了研究,发现偏度与峰度之间具有较好的线性关系,并给出了0°、10°及20°屋盖坡角下偏度与峰度的线性拟合公式。

Abstract

A low building and a tower were constructed near Shanghai Pudong International Airport by East China Sea in order to investigate characteristic of wind field and wind pressure on the surface of the roof. The remarkable feature of the test building is that the roof pitch can be adjusted between 0°and 30°, so that the impact of pressure on different roof pitches can be analyzed. First in this paper, three ten minutes' wind pressure time-history were analyzed with different roof pitches at 0°, 10° and 20°, respectively. And then comparison was made with wind tunnel test data by a rigid model with 1:30 scale. It is suggested that distributions of the mean and fluctuating pressure distribution agree well with those by method of the wind tunnel test results. Next, the stationarity and correlation of wind velocity and wind direction are examined, and it is discovered that the coupling effect between them is evident. The impact of the vertical wind direction on fluctuating wind velocity is large, and the correlation coefficient is about -0.5 when there is no lagged time. Finally, the non-Gaussian characteristic of the pressure is investigated. It is shown that there exists linear relation between the skewness and kurtosis, and the fitting equations are presented between skewness and kurtosis with 0, 10, and 30 pitches.

关键词

变坡房 / 低矮建筑 / 风压系数 / 现场实测 / 风洞试验 / 非高斯

Key words

test building with adjustable roof pitch / low building / pressure coefficients / field investigation / wind tunnel test / non-gaussian

引用本文

导出引用
王旭;黄鹏;顾明. 海边坡角可调试验房风荷载现场实测研究[J]. 振动与冲击, 2012, 31(5): 176-182
WANG Xu;HUANG Peng;GU Ming . Field investigation of the wind loads on Test Building with adjustable roof pitch by the sea[J]. Journal of Vibration and Shock, 2012, 31(5): 176-182

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