矩形断面高层建筑脉动风荷载频谱特性研究

曾加东; 李明水

doi:10.3969/j.issn.0258-2724.2017.01.012

矩形断面高层建筑脉动风荷载频谱特性研究

doi: 10.3969/j.issn.0258-2724.2017.01.012

曾加东¹,
李明水^1,2, ,

基金项目:

国家自然科学基金资助项目（51278433，51478402）

详细信息

作者简介:
曾加东(1987-),男,博士研究生,研究方向为结构风工程,E-mail:zjd_rcwe@126.com

通讯作者:
李明水(1966-),男,教授,博士,研究方向为建筑及桥梁风工程,E-mail:lms_rcwe@126.com

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出版历程
- 收稿日期: 2015-11-11
- 刊出日期: 2017-02-25

Experimental Study of Spectral Characteristics of Fluctuating Wind Loads on High-Rise Building with Rectangular Section

ZENG Jiadong¹,
LI Mingshui^{1,2
, ,}

摘要

摘要: 为研究风场特性及矩形断面长宽比等因素对矩形高层建筑脉动风荷载功率谱特性的影响，以矩形断面（宽厚比B/D=2∶1，1∶2）为例，采用刚性模型测压风洞试验的方法，测得了边界层中矩形模型的脉动风荷载时程.参考日本建筑设计建议（AIJ）给出的横风向脉动风荷载谱模型，对试验结果进行拟合，给出了一个简化的矩形高层建筑横风向脉动风荷载功率谱函数表达式.试验结果表明，顺风向脉动风荷载主要由纵向紊流引起，其功率谱密度函数特征与来流紊流基本一致；横风向脉动风荷载的形成机理较为复杂，矩形断面侧边存在复杂的分离流动及再附现象，但其无量纲功率谱密度沿高度基本一致；斯托哈尔数沿高度方向变化较小，当宽厚比分别为2∶1和1∶2时，斯托哈尔数分别约为0.128和0.069 7.
- 矩形高层建筑 /
- 风洞试验 /
- 脉动风荷载 /
- 功率谱特性 /
- 数学模型
Abstract: In order to study the effects of wind field characteristics and side ratio of rectangular section on the spectral characteristics of fluctuating wind loads for rectangular high-rise buildings, the pressure fluctuations on a stationary rigid model with cross configurations of 1:2 and 2:1 were measured by wind tunnel test for synchronous pressure measurement in simulated atmospheric boundary layer. Referring to the spectral model given by the Architectural Institute of Japan (AIJ), a simplified spectral expression of fluctuating across-wind loading of rectangular high-rise building was proposed by fitting the measured results. The experimental results show that the fluctuating along-wind load is mainly caused by longitudinal turbulence, and the spectrum of fluctuating along-wind load is consistent with those of incident turbulence. The formation mechanism of fluctuating across-wind loads is more complex, and there is vortex shedding, separation or reattachment on the sides of the rectangular prism. The dimensionless power spectral density and the Strouhal numbers are almost constant along the height. The values of Strouhal number are 0.128 and 0.069 7 respectively for the side ratios of 2:1 and 1:2.
- high-rise building /
- wind tunnel test /
- fluctuating wind loads /
- spectral characteristic /
- mathematical model

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参考文献(19)

DAVENPORT A G. How can we simplify and generalize wind loads[J]. Journal of Wind Engineering and Indautrial Aerodynamics, 1995, 54/55:657-669.

KAREEM A. Model for predicting the across-wind response of building[J]. Engineering Structures, 1984, 6:136-141.

ISLAM M, ELLING B, COROTIS R. Transfer function model for determing dynamic wind loads on building[J]. Journal of Wind Engineering and Indautrial Aerodynamics, 1990, 36:449-458.

ZHOU Y, KIJEWSKI T, KAREEM A. Aerodynamic loads on tall buildings interative database[J]. Journal of Wind Engineering and Indautrial Aerodynamics, 2003, 129(3):394-404.

KAREEM A. Dynamic response of high-rise buildings to stochastic wind loads[J]. Journal of Wind Engineering and Indautrial Aerodynamics, 1992, 42(1/2/3):1101-1112.

VICKERYB J. Fluctuating lift and drag on a long cylinder of square cross-section in a smooth and in a turbulent stream[J]. Journal of Fluid Mechanics, 1996, 25(3):481-494.

SOLARI G. Mathmatical model to predict 3-D wind loading on building[J]. Journal of Engineering Mechanics, 1985, 111(2):254-276.

CHENG C M, LU P C, CHEN R H. Wing loads on square cylinder in homogeneous turbulent flous[J]. Journal of Wind Engineering and Indautrial Aerodynamics, 1992, 41(1/2/3):739-749.

黄鹏,蔡玢,全涌,等. 基于实测的低矮房屋屋面风压极值计算方法[J].西南交通大学学报,2014,49(2):247-253. HUANG Peng, CAI Fen, QUAN Yong, et.al. Peak pressure estimation method of wind loads on low-rise building based on field measurement[J]. Journal of Southwest Jiaotong University, 2014, 49(2):247-253.

顾明,叶丰. 高层建筑的横风向激励特性和计算模型的研究[J]. 土木工程学报,2006,39(2):1-6. GU Ming, YE Feng. Characterstics and computational model of across-wind load of tall buildings[J]. China Civil Engineering Journal, 2006, 39(2):1-6.

LIANG Shuguo, LIU Shengchun, LI Q S, et al. Mathmatical model of across-wind dynamic loads on rectanular tall buildings[J]. Journal of Wind Engineering and Indautrial Aerodynamics, 2002, 90:1757-1770.

王新荣,顾明,全涌. 二维矩形柱体表面风压频域特性的雷诺数效应研究[J]. 工程力学,2016,33(7):100-107. WANG Xinrong, GU Ming, QUAN Yong. Reynolds number effects on frequency domain characteristics of wind pressures on 2D rectangular prisms[J]. Engineering Mechanics, 2016, 33(7):100-107.

HUOT J P, REY C, AEBEY H. Experimental analysis of the pressure field induced on a square cyliner by a turbulent flow[J]. Journal of Fluid Mechanics, 1986, 162:283-298.

顾明,叶丰. 典型超高层建筑风荷载频域特性研究[J]. 建筑结构学报,2006,27(1):30-36. GU Ming, YE Feng. Frequence domain characteristics of wing loads on typical super-tall buildings[J]. Journal of Building Structures, 2006, 27(1):30-36.

GU M, QUAN Y. Across-wind aerodynamic force and aerodynamic damping of typical tall building[J]. Journal of Wind Engineering and Indautrial Aerodynamics, 2004, 92(13):1147-1165.

唐意,顾明,全涌. 矩形高层建筑横风向脉动风力,Ⅱ:数学模型[J]. 振动与冲击,2010,29(6):46-49. TANG Yi, GU Ming, QUAN Yong. Fluctuating force of across-wind acting an rectangular super-tall buildings, PartⅡ:Mathematical model[J]. Journal of Vibration and Shock, 2010, 29(6):46-49.

TAMURA T, ONO Y. LES analysis on aeroelastic instability of prisms in turbulent flow[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2003, 91(12):1827-1846.

TAMURA Y, KAWAI H, VEMASTSV Y. Wind loads and wing-induced response estimations in the recommendations for loads on buildings, AIJ 1993[J]. Engineering Structures, 1996, 18(6):399-411.

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 Indautrial Aerodynamics, 1993, 46/47:507-516.

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