矩形超高层建筑归一化横风向脉动风荷载谱模型
引用文献：
丘杏逢 曾加东 张志田. 矩形超高层建筑归一化横风向脉动风荷载谱模型[J]. 建筑结构，2023，48（10）：15-20.
QIU Xingfeng ZENG Jiadong ZHANG Zhitian. Normalized cross-wind fluctuating wind load spectrum model of rectangular super high-rise buildings[J]. Building Structure，2023,48（10）：15-20.
摘要：为研究超高层建筑横风向脉动风荷载谱特性，在B、D两类紊流风场中开展了不同长宽比矩形刚性模型测压试验。结果表明：横风向脉动风荷载特性主要受紊流风场、气动外形和旋涡脱落等因素影响，矩形柱截面的长宽比变化将影响功率谱幅值及能量分布。当矩形柱截面长宽比小于3时，横风向脉动风荷载谱特性主要受旋涡脱落控制，但当长宽比超过3后，矩形柱侧面分离再附流动的影响逐渐加强，具体表现在：功率谱峰值减小、带宽增大及高频区出现较小谱峰。根据风洞试验结果和矩形柱横风向脉动风荷载谱特性，提出了归一化横风向脉动风荷载谱模型，该经验公式物理意义明确、形式简洁，有一定的工程参考意义。
关键词：矩形超高层建筑；横风向脉动风荷载；风洞试验；归一化谱模型；
基金：海南省自然科学基金资助项目(520RC545、520CXTD433)；国家自然科学基金资助项目(52068020、51938012、52268012)。
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[18] CHOI H,KANDA J.Proposed formulae for the power spectral densities of fluctuating lift and torque on rectangular 3-D cylinders [J].Journal of Wind Engineering and Industrial Aerodynamics,1993,46:507-516.
[2] DAVENPORT A G,AGNEW R,HARRIS R I,et al.Discussion the application of statistical concepts to the wind loading of structures[J].Proceedings of the Institution of Civil Engineers,1962,23(1):143-146.
[3] AMIN J A,AHUJA A K.Characteristics of wind forces and responses of rectangular tall buildings [J].International Journal of Advanced Structural Engineering,2014,6(3):1-14.
[4] GU M,QUAN Y.Across-wind loads and effects of super-tall buildings and structures[J].Science China Technological Sciences,2011,54(10):2531-2541.
[5] 全涌，曹会兰，顾明.高层建筑横风向风效应研究综述[J].同济大学学报(自然科学版),2010,38(6):810-818.
[6] LIU YI.Effects of plan dimensions on gust wind loads for high-rise buildings[J].Journal of Wind Engineering and Industrial Aerodynamics,2019,194:103980.
[7] TAMURA Y,KAWAI H,UEMATSU Y,et al.Wind load and wind-induced response estimations in the recommendations for loads on buildings [J].AIJ Engineering Structures,1996,18(6):399-411.
[8] 全涌，顾明.超高层建筑横风向气动力谱[J].同济大学学报(自然科学版),2002,30(5):627-632.
[9] 梁枢果，刘胜春，张亮亮，等.矩形高层建筑横风向动力风荷载解析模型[J].空气动力学学报，2002,20(1):32-38.
[10] 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.
[11] 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.
[12] HUANG D M,ZHU L D,CHEN W.Power spectra of wind forces on a high-rise building with section varying along height[J].Wind and Structures,2014,18(3):295-320.
[13] KAREEM A.Dynamic response of high-rise buildings to stochastic wind loads [J].Journal of Wind Engineering and Industrial Aerodynamics,1992,42(1):1101-1112.
[14] 曾加东，李明水，张志田，等.不同长宽比矩形高层建筑的分离再附流动特性 [J].西南交通大学学报，2020,55(4):780-788.
[15] ZHANG H,XIN D,OU J.Steady suction for controlling across-wind loading of high-rise buildings [J].The Structural Design of Tall and Special Buildings,2016,25(15):785-800.
[16] GU M,QUAN Y.Across-wind loads of typical tall buildings [J].Journal of Wind Engineering and Industrial Aerodynamics,2004,92(13):1147-1165.
[17] LIANG S,LIU S,LI Q S,et al.Mathematical model of acrosswind dynamic loads on rectangular tall buildings [J].Journal of Wind Engineering and Industrial Aerodynamics,2002,90(12):1757-1770.
[18] CHOI H,KANDA J.Proposed formulae for the power spectral densities of fluctuating lift and torque on rectangular 3-D cylinders [J].Journal of Wind Engineering and Industrial Aerodynamics,1993,46:507-516.
Normalized cross-wind fluctuating wind load spectrum model of rectangular super high-rise buildings
Abstract: In order to study the characteristics of cross-wind fluctuating wind load spectrum of super high-rise buildings, pressure tests of rectangular rigid models with different aspect ratios were carried out in two types of turbulent wind fields B and D. The results show that the characteristics of cross-wind fluctuating wind load are mainly affected by factors such as turbulent wind field, aerodynamic shape and vortex shedding. The aspect ratio change of the rectangular column section will affect the power spectrum amplitude and energy distribution. When the aspect ratio of the rectangular column section is less than 3, the cross-wind fluctuating wind load spectrum characteristic is mainly controlled by the vortex shedding, but when it exceeds 3, the influence of the side separation and attached flow of the rectangular column gradually strengthens, which is shown in: the peak power spectrum decreases smaller, increased bandwidth, and smaller peaks appearing in the high-frequency region. According to the wind tunnel test results and the characteristics of the cross-wind fluctuating wind load spectrum of the rectangular column, a normalized cross-wind fluctuating wind load spectrum model was proposed. The empirical formula has clear physical meaning and concise form, which has certain engineering reference significance.
Keywords: rectangular super high-rise building; cross-wind fluctuating wind load; wind tunnel test; normalized spectrum model
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