复杂柱面大跨屋盖结构风压分布特性风洞试验研究

卫思彤; 伍晓红; 赵超; 孙清

doi:10.3724/j.gyjzG23022010

复杂柱面大跨屋盖结构风压分布特性风洞试验研究

doi: 10.3724/j.gyjzG23022010

西安交通大学土木工程系, 西安 710049

基金项目:

国家自然科学基金项目（51978570）。

详细信息

作者简介:
卫思彤，博士，主要从事钢结构的受力性能与设计方法研究，weisitong94@stu.xjtu.edu.cn。

通讯作者:
孙清，博士，教授，主要从事钢结构抗震、减震与控制，高耸及大跨度结构抗风研究，sunq@mail.xjtu.edu.cn。

计量
- 文章访问数: 31
- HTML全文浏览量: 11
- PDF下载量: 0
- 被引次数: 0
出版历程
- 收稿日期: 2023-02-20

Wind Tunnel Eexperimental Research on Wind Pressure Distribution Characteristics of Complex Cylindrical Long-Span Roof Structures

Department of Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China

摘要

摘要: 在大气边界层风洞中模拟B类风场，对复杂柱面大跨屋盖结构刚性模型进行双面测压试验，获得测点在24个风向角下的风压时程。基于试验结果分析了不同风向角和开敞状态对屋盖表面平均风压分布特性的影响，研究了脉动风压频谱特性、相关系数以及测点间的空间相干性。结果表明：屋盖表面主要由负压控制，在结构端部约20 m范围内以及屋盖顶部等区域易形成高负压区，结构体型的复杂性使得结构交界部位在除0°和180°风向角下的局部风压均表现出异于单个柱面结构的风压分布特征；开敞状态使屋盖表面风吸力显著减小；脉动风压频谱特征与湍流尺度有关，迎风侧低频成分明显，背风侧高频成分突出；顺风向和横风向相干性均随频率和测点空间距离的增大而减小，后者衰减得更快。
- 大跨屋盖 /
- 风洞试验 /
- 风压分布特性 /
- 功率谱 /
- 相干性
Abstract: A double-sided synchronized pressure test was conducted on a rigid model of a complex cylindrical long-span roof in a terrain B boundary layer wind tunnel. The time histories of wind pressure in 24 wind directions were obtained from the wind pressure measurements. Based on the test results， the influence of wind direction and opening state on the mean wind pressure distribution characteristics was analyzed， the power spectral densities， correlation coefficients， and coherence functions of the wind loads were studied in detail. The results showed that the roof surface was predominantly governed by negative pressure， with high negative pressure zones prone to forming within approximately 20 meters at the structural ends and near the roof apex； the geometric complexity of the structure led to distinct local wind pressure distributions at structural junctions compared to individual cylindrical structures at all wind angles except 0° and 180°； the open configuration significantly reduced wind suction on the roof surface； the spectral characteristics of fluctuating wind pressure were associated with turbulence scale， where low-frequency components dominated the windward side while high-frequency components prevailed on the leeward side. Both along-wind and cross-wind coherence decreased with increasing frequency and spatial distance between measurement points， and the latter decayed more rapidly.
- long-span roof /
- wind tunnel test /
- wind pressure distribution characteristics /
- power spectrum /
- coherence

HTML全文

参考文献(25)

[1]	WANG D Z,ZHI X D,FAN F,et al. The energy-based failure mechanism of reticulated domes subjected to impact[J]. ThinWalled Structures,2017,119:356-370.
[2]	ZHANG J,ZHU B Y,WANG F,et al. Buckling of prolate eggshaped domes under hydrostatic external pressure[J]. ThinWalled Structures,2017,119:296-303.
[3]	HUANG G Q,HE H,MEHTA K C,et al. Data-based probabilistic damage estimation for asphalt shingle roofing[J]. Journal of Structural Engeering,2015,141,04015065.
[4]	GAVANSKI E,GURLEY K R,KOPP G A. Uncertainties in the estimation of local peak pressures on low-rise buildings by using the Gumbel distribution fitting approach[J]. Journal of Structural Engeering,2016,142,04016106.
[5]	COPE A D,GURLEY K R,GIOFFRE M,et al. Low-rise gable roof wind loads:characterization and stochastic simulation[J]. Journal of Wind Engineering and Industrial Aerodynamics,2005,93:719-738.
[6]	KUMAR K S,Stathopoulos T. Synthesis of non-Gaussian wind pressure time series on low building roofs[J]. Engineering Structures,1999,21:1086-1100.
[7]	KASPERSKI M. Specification of the design wind load:a critical review of code concepts[J]. Journal of Wind Engineering and Industrial Aerodynamics,2009,97(7/8):335-357.
[8]	KASPERSKI M. Specification of the design wind load based on wind tunnel experiments[J]. Journal of Wind Engineering and Industrial Aerodynamics,2003,91(4):527-541.
[9]	张相庭.结构风工程[M].北京:中国建筑工业出版社,2006:3.
[10]	中华人民共和国住房和城乡建设部.建筑结构荷载规范:GB 50009-2012[S].北京:中国建筑工业出版社,2012.
[11]	王浩,李宇青,姜会民,等.考虑风向角和周边建筑影响的大跨气膜煤棚风荷载特性试验研究[J].石家庄铁道大学学报(自然科学版),2022,35(2):20-25.
[12]	孙芳锦,祝东涵,张尚祥,等.大跨开合屋盖风压特性研究[J].应用力学学报,2022,39(5):989-996.
[13]	LI Y Q,TAMURA Y,YOSHIDA A,et al. Wind loading and its effects on single-layer reticulated cylindrical shells[J]. Journal of Wind Engineering and Industrial Aerodynamics,2006,94:949-973.
[14]	闫渤文,魏民,刘敏,等.考虑带宽修正的大跨屋盖结构非高斯风压极值估计方法[J].振动与冲击,2022,41(19):30-36.
[15]	孙瑛,苏宁,武岳.典型大跨度屋盖结构的风压谱工程简化模型[J].建筑结构学报,2019,40(7):23-33.
[16]	林拥军,沈艳忱,李明水,等.大跨翘曲屋盖风压分布的风洞试验与数值模拟[J].西南交通大学学报,2018,5(2):226-233.
[17]	LIU M,LI Q S,HUANG S H,et al. Evaluation of wind effects on a large span retractable roof stadium by wind tunnel experiment and numerical simulation[J]. Journal of Wind Engineering and Industrial Aerodynamics,2018,179:39-57.
[18]	LUO N,JIA H Y,LIAO H L. Coupled wind-induced responses and equivalent static wind loads on long-span roof structures with the consistent load-response-correlation method[J]. Journal of Structural Engineering,2018,21(1):71-81.
[19]	KOPP G A,AKON A F. Mean pressure distributions and reattachment lengths for roof-separation bubbles on low-rise buildings[J]. Journal of Wind Engineering and Industrial Aerodynamics,2016,155:115-125.
[20]	TAMURA Y,KATSUMURA A,YOSHIDA A,et al. Wind loading and its effects on single-layer reticulated cylindrical shells[J]. Journal of Wind Engineering and Industrial Aerodynamics,2006,94(12):949-973.
[21]	UEMATSU Y,KURIBARA O,YAMADA M,et al. Wind-induced dynamic behavior and its load estimation of a single-layer latticed dome with a long span[J]. Journal of Wind Engineering and Industrial Aerodynamics,2001,89(14/15):1671-1687.
[22]	李玉学,白硕,杨庆山,等.大跨度柱面网壳结构风荷载特性风洞试验研究[J].建筑结构学报,2015,36(4):105-111.
[23]	马文勇,刘庆宽,肖彬,等.三心圆柱面网壳结构风荷载分布规律[J].工程力学,2011,28(2):166-171.
[24]	陈伏彬,李秋胜,傅继阳,等.大跨屋盖风荷载的频域特性试验研究[J].振动与冲击,2012,31(5):111-117.
[25]	孙虎跃,叶继红.大跨马鞍屋盖脉动风压谱特性[J].哈尔滨工业大学学报,2017,49(6):142-149.