Frequency domain characteristics of wind pressure on a high-rise building under thunderstorm downburst

FANG Zhiyuan1, WANG Zhisong1,2, LI Zhengliang1,2

Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (7) : 51-58.

PDF(3819 KB)
PDF(3819 KB)
Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (7) : 51-58.

Frequency domain characteristics of wind pressure on a high-rise building under thunderstorm downburst

  • FANG Zhiyuan1, WANG Zhisong1,2, LI Zhengliang1,2
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Abstract

In order to study frequency domain characteristics of wind pressure on a high-rise building under thunderstorm downburst, an impinging jet device was used to simulate thunderstorm downburst, and pressure tests were conducted on a rectangular high-rise building model under simulated thunderstorm downburst. According to test data, power spectral density, correlation coefficients in horizontal and vertical directions and coherence functions in horizontal and vertical ones of fluctuating wind pressure were analyzed in detail. Effects of radial position of the model on fluctuating wind pressure’s frequency domain characteristics were discussed. The results showed that power spectral density of fluctuating wind pressure on the model’s windward surface at radial position is basically consistent to that of incoming flow wind speed spectrum; energy of fluctuating wind pressure on sides and leeward one is mainly concentrated at vortex shedding frequencies; correlation of wind pressures decreases with increase in distance between measured points; coherences in horizontal and vertical directions of wind pressures on windward side are stronger, and synchronization of fluctuating wind pressures is better; horizontal coherence of wind pressure on sides is more significant when the reduction frequency is less than 0.2, and its vertical coherence is relatively better within the whole frequency range; coherences in horizontal and vertical directions of wind pressure on leeward side are stronger when the reduction frequency is less than 0.1, and coherence quickly weakens with increase in the reduction frequency; there is a stronger horizontal coherence between wind pressures on windward side and leeward one near the reduction frequency of 0.06; when phase angle difference is about 180°, fluctuating wind pressure reveals the opposite phase characteristics.

Key words

thunderstorm downburst / impinging jet / high-rise building / power spectrum / coherence function

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FANG Zhiyuan1, WANG Zhisong1,2, LI Zhengliang1,2. Frequency domain characteristics of wind pressure on a high-rise building under thunderstorm downburst[J]. Journal of Vibration and Shock, 2020, 39(7): 51-58

References

  
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  2. Kareem A. Measurements of pressure and force fields on building models in simulated atmospheric flows[J]. Journal of Wind Engineering & Industrial Aerodynamics, 1990, 36(1):589-599.

  3. Lin N, Letchford C, Tamura Y, et al. Characteristics of wind forces acting on tall buildings[J]. Journal of Wind Engineering & Industrial Aerodynamics, 2005, 93(3):217-242.
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of Building Structures，2006, 34(3):285-290.
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ZENG Jiadong，LI Mingshui． Experimental study of spectral characteristics of fluctuating wind loads on high-rise building with rectangular section[J]． Journal of Southwest Jioatong University，2017，52( 1) : 83-90．
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ZHAO Yang，CAO Shuyang，TAMURA Yukio，et al． Simulation of downburst and its loads with wind tunnel test[J]．Journal of Vibration and Shock，2009，28( 4) : 1-3．
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  2. Zhang Y, Sarkar P, Hu H. An experimental study on wind loads acting on a high-rise building model induced by microburst-like winds[J]. Journal of Fluids & Structures, 2014, 50(97):547-564.
  3. 汪之松, 左其刚, 唐伟峰,等. 稳态冲击射流作用下平地及坡地高层建筑的风荷载特性[J]. 建筑结构学报, 2017, 38(3):103-110.
WANG Zhisong, Zuo Qigang, Tang Weifeng, et al. Wind load characteristics for high-rise building on flat terrain and slope under steady-state impinging jet[J]. Journal of Building Structures, 2017, 38(3):103-110.
  1. 汪之松, 方智远, 刘亚南. 雷暴冲击风作用下坡地坡度对高层建筑风压的影响[J]. 西南交通大学学报, 2017, 52(5):893-901.
WANG Zhisong, FANG Zhiyuan, LIU Ya'nan． Effect of slope gradient on wind pressure of high-rise buildings during thunderstorm[J]． Journal of Southwest Jiaotong University, 2017, 52( 5) : 893-901．
  1. 方智远, 汪之松, 李正良. 雷暴冲击风作用下高层建筑风压幅值特性[J]. 建筑结构学报（已接收）
FANG Zhiyuan, Wang Zhisong, Li Zhengliang. Wind Pressure Amplitude Characteristics of High-Rise Buildings Under Thunderstorm Downburst[J]. Journal of Building Structures (accepted)
  1. Hjelmfelt M R. Structure and life circle of microburst outinflows observed in Colorado [J]. J. Appl Meteorol, 1988, 27(8): 900 -927.
  2. Letchford C W, Illidge G. Turbulence and topographic effects in simulated thunderstorm downdrafts by wind tunnel jet[C]. Proceedings of the Tenth International Conference on Wind Engineering, Denmark, June 1999, 1907-1912.
  3. Wood G S, K wo ka K C S, Motteramb N A, Fletcher D F. Physical and numerical modeling of thunder-storm downbursts[J]. Journal of Wind Engineering and Industrical Aerodynamics, 89(6):535-552, 2001.
~

  1. Letchford C W, Mans C, Chay M T. Thunderstorms—their importance in wind engineering (a case for the next generation wind tunnel)[J]. Journal of Wind Engineering & Industrial Aerodynamics, 2002, 90(12):1415-1433.

  2. Kareem A. Measurements of pressure and force fields on building models in simulated atmospheric flows[J]. Journal of Wind Engineering & Industrial Aerodynamics, 1990, 36(1):589-599.

  3. Lin N, Letchford C, Tamura Y, et al. Characteristics of wind forces acting on tall buildings[J]. Journal of Wind Engineering & Industrial Aerodynamics, 2005, 93(3):217-242.

  4. 叶丰, 顾明. 超高层建筑风压的频域特性[J]. 同济大学学报(自然科学版), 2006, 34(3):285-290.

GU Ming，YE Feng． Frequence domain characteristics of wind loads on typical super-tall buildings[J]． Journal

of Building Structures，2006, 34(3):285-290.

  1. 曾加东, 李明水. 矩形断面高层建筑脉动风荷载频谱特性研究[J]. 西南交通大学学报, 2017, 52(1):83-90.

ZENG Jiadong，LI Mingshui． Experimental study of spectral characteristics of fluctuating wind loads on high-rise building with rectangular section[J]． Journal of Southwest Jioatong University，2017，52( 1) : 83-90．

  1. 赵杨, 曹曙阳, Tamura Y , et al. 雷暴冲击风模拟及其荷载的风洞试验研究[J]. 振动与冲击, 2009, 28(4)：1-3.

ZHAO Yang，CAO Shuyang，TAMURA Yukio，et al． Simulation of downburst and its loads with wind tunnel test[J]．Journal of Vibration and Shock，2009，28( 4) : 1-3．

  1. 董欣, 赵昕, 丁洁民,等. 矩形高层建筑表面风压特性研究[J]. 建筑结构学报, 2016, 37(10):116-124.

DONG Xin, ZHAO Xin, DING Jiemin, et al. Wind pressure characteristics on a high-rise building with rectangular section[J]. Journal of Building Structures, 2016, 37(10):116-124

  1. Jesson M, Sterling M, Letchford C, et al. Aerodynamic forces on generic buildings subject to transient, downburst-type winds[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2015: 58-68.

  2. Zhang Y, Sarkar P, Hu H. An experimental study on wind loads acting on a high-rise building model induced by microburst-like winds[J]. Journal of Fluids & Structures, 2014, 50(97):547-564.

  3. 汪之松, 左其刚, 唐伟峰,等. 稳态冲击射流作用下平地及坡地高层建筑的风荷载特性[J]. 建筑结构学报, 2017, 38(3):103-110.

WANG Zhisong, Zuo Qigang, Tang Weifeng, et al. Wind load characteristics for high-rise building on flat terrain and slope under steady-state impinging jet[J]. Journal of Building Structures, 2017, 38(3):103-110.

  1. 汪之松, 方智远, 刘亚南. 雷暴冲击风作用下坡地坡度对高层建筑风压的影响[J]. 西南交通大学学报, 2017, 52(5):893-901.

WANG Zhisong, FANG Zhiyuan, LIU Ya'nan． Effect of slope gradient on wind pressure of high-rise buildings during thunderstorm[J]． Journal of Southwest Jiaotong University, 2017, 52( 5) : 893-901．

  1. 方智远, 汪之松, 李正良. 雷暴冲击风作用下高层建筑风压幅值特性[J]. 建筑结构学报（已接收）

FANG Zhiyuan, Wang Zhisong, Li Zhengliang. Wind Pressure Amplitude Characteristics of High-Rise Buildings Under Thunderstorm Downburst[J]. Journal of Building Structures (accepted)

  1. Hjelmfelt M R. Structure and life circle of microburst outinflows observed in Colorado [J]. J. Appl Meteorol, 1988, 27(8): 900 -927.

  2. Letchford C W, Illidge G. Turbulence and topographic effects in simulated thunderstorm downdrafts by wind tunnel jet[C]. Proceedings of the Tenth International Conference on Wind Engineering, Denmark, June 1999, 1907-1912.

  3. Wood G S, K wo ka K C S, Motteramb N A, Fletcher D F. Physical and numerical modeling of thunder-storm downbursts[J]. Journal of Wind Engineering and Industrical Aerodynamics, 89(6):535-552, 2001.
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