超高层建筑实测风压相干性的小波分析

申建红;;李春祥

振动与冲击 ›› 2010, Vol. 29 ›› Issue (7) : 162-168.

PDF(2030 KB)
PDF(2030 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (7) : 162-168.
论文

超高层建筑实测风压相干性的小波分析

  • 申建红1, 2; 李春祥2
作者信息 +

Wavelet analysis of the coherence of full-scale measurement wind pressure on a super tall building

  • Shen Jianhong 1, 2; Li Chunxiang 2
Author information +
文章历史 +

摘要

在结构的顺风向动力响应计算中,高层建筑上任意两点风压的空间相关性信息是必需的。风压全尺度实测是分析建筑物风压相干性的必要途径。而小波变换为非平稳风压间的相干性分析提供了有力的工具。为了获得超高层建筑风压的相干性信息,针对一超高层建筑进行了强风下的风压现场实测,基于小波变换分别进行了风压间小波相干和考虑伪相干的小波相干分析,对各测点之间风压的相关性与依据经验公式计算的风速相关性进行了比较。比较结果表明,在低频区域,任意两点脉动风速的相干性高于脉动风压的相干性;反之亦然。

Abstract

For the estimation of along-wind structural responses, the information is required on the spatial correlation of wind pressures between any two points on a super tall building. The full-scale measurements of wind-induced pressures are necessary approach to analyze the coherence of wind pressures on wall faces of a building. It is known that the wavelet transform provides a powerful tool to analyze the coherence of nonstationary wind pressures. In order to obtain the coherence information between wind-induced pressures, wind field full-scale measurements have been accomplished on a super tall building. The coherence between wind pressures, with and without considerations of spurious coherence, respectively, is analyzed by using the wavelet transform. Likewise the coherence of wind-induced pressure fluctuations is compared with that of wind velocity fluctuations derived in accordance with an experiential formula. The comparative results demonstrate that in lower frequency domain, the coherence of wind velocity fluctuations is higher than that of wind-induced pressure fluctuations between any two points on a super tall building; and vice versa.

关键词

超高层建筑 / 风压全尺度实测 / 小波变换 / 风压相干性 / 风速相干性

Key words

Super tall buildings / Full-scale measurement wind pressures / Wavelet transform / Coherence of wind velocity fluctuations / Coherence of wind-induced pressure fluctuations

引用本文

导出引用
申建红;;李春祥. 超高层建筑实测风压相干性的小波分析[J]. 振动与冲击, 2010, 29(7): 162-168
Shen Jianhong;;Li Chunxiang . Wavelet analysis of the coherence of full-scale measurement wind pressure on a super tall building[J]. Journal of Vibration and Shock, 2010, 29(7): 162-168

PDF(2030 KB)

Accesses

Citation

Detail

段落导航
相关文章

/