Journal of South China University of Technology(Natural Science) >

2025 , Vol. 53 >Issue 2: 136 - 148

DOI: https://doi.org/10.12141/j.issn.1000-565X.240266

Architecture & Civil Engineering

LES Study on the Influence of Streamlined Accessories on the Wind Loads of TTU Model

  • YANG Yi ,
  • WANG Zhe ,
  • ZHANG Zhiyuan
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  • 1.State Key Laboratory of Subtropical Building and Urban Science，South China University of Technology，Guangzhou 510640，Guangdong，China
    2.Central & Southern China Municipal Engineering Design and Research Institute Co. ，Ltd. ，Wuhan 430010，Hubei，China
杨易（1975—），男，博士，教授，主要从事风工程研究。E-mail： ctyangyi@scut.edu.cn

Received date: 2024-05-28

  Online published: 2024-08-23

Supported by

the National Natural Science Foundation of China(52178480);the Guangdong Province Basic and Applied Basic Research Fund Project(2022A1515010350)

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Abstract

The high extreme negative pressure that occurs in the corner area of the roof of a low-rise building is the focus of the wind-resistant design of its envelope. Based on the aerodynamic principle and the standard building model of TTU (Texas Tech University), this paper designed a new streamlined add-on accessories in the corner area of roof according to the wind flow patterns in the roof corner. By altering parameters such as the height and length of additional components, it conducted a comparative study involving rigid model pressure measurements in wind tunnel tests under 10 working conditions and Large Eddy Simulation (LES). The study aimed to explore the impact of these new types of additional components on wind loads in roof corner zones, aerodynamic optimization for wind resistance of roofs, and the accuracy of LES simulations.The study shows that: 1) the wind tunnel test results show that the installation of add-on accessories in the roof corner area can effectively reduce the extreme negative pressure in the corner area, and the most unfavorable mean negative pressure in the roof corner area can be reduced by 10%, and the most unfavorable extreme negative pressure can be reduced by 25% under the 10 working conditions studied; 2) the NSRFG（Narrowband Synthesis Random Flow Generation）method is used to generate the inlet turbulence, and the wind load distribution pattern in the TTU model under various conditions is obtained by the LES simulation. Although the absolute value of the mean wind pressure coefficient of the roof under some working conditions simulation results are larger (the mean error is 13.88%), and the extreme wind pressure coefficient is smaller (the mean error is 9.72%), it is overall consistent with the wind tunnel test, indicating that the NSRFG method has good accuracy; 3) LES numerical simulation parameter study shows that the influence of the length of the add-on accessories on the wind load in the roof corner area is greater than that of the height, the extreme wind pressure coefficient in the roof corner area decreases by 6.15% after the height of the equal length add-on accessories increase by 1 times; the extreme wind pressure coefficient in the roof corner area decreases by 10.77% after the length of the equal height add-on accessories increase by 0.8 times.

Key words： low-rise building; wind load; large eddy simulation; wind tunnel test; optimization design

Cite this article

YANG Yi , WANG Zhe , ZHANG Zhiyuan . LES Study on the Influence of Streamlined Accessories on the Wind Loads of TTU Model[J]. Journal of South China University of Technology(Natural Science), 2025 , 53(2) : 136 -148 . DOI: 10.12141/j.issn.1000-565X.240266

References

1 YANG Q， YIN J， LIU M， et al ．Post-disaster investigations of damage feature of buildings and structures due to several local strong winds in China during 2021-2024［J］．Advances in Wind Engineering，2024（1）：100011.
2 杨易，谢壮宁，石碧青 ．屋顶构造形式对传统民居风荷载特性的影响［J］．建筑结构学报，2017，38（2）：143-150.
  YANG Yi， XIE Zhuangning， SHI Biqing ．Influence of roof members on wind load characteristics of traditional low-rise residence buildings［J］．Journal of Building Structures，2017，38（2）：143-150.
3 董欣，叶继红，丁洁民 ．低矮建筑表面破坏性旋涡及其诱导的风压特性研究综述［J］．建筑结构学报，2018，39（1）：1-10.
  DONG Xin， YE Jihong， DING Jiemin ．Review of destructive vortices and vortex-induced wind pressures on low-rise buildings［J］．Journal of Building Structures，2018，39（1）：1-10.
4 PRATT R N， KOPP G A ．Velocity field measurements above the roof of a low-rise building during peak suctions［J］．Journal of Wind Engineering and Industrial Aerodynamics，2014，133（1）： 234-241.
5 WU F， SARKAR P P， MEHTA K C ．Full-scale study of conical vortices and roof corner pressures［J］．Wind and Structures，2001，4（2）：131-146.
6 黄强 ．低层建筑表面风荷载数值模拟研究［D］．上海：同济大学，2007.
7 HUANG P， PENG X， GU M ．Wind tunnel study on effects of various parapets on wind load of a flat-roofed low-rise building［J］．Advances in Structural Engineering. 2017，20（12）：1907-1919.
8 甘石 ．扰流板抗风装置性能分析及其在低矮建筑上的应用研究［D］．大连：大连理工大学，2020.
9 胡晓兵，杨易 ．高层建筑标准模型脉动风压特性大涡模拟适用方法研究［J］．建筑结构学报，2022，43（10）：95-103.
  HU Xiaobing， YANG Yi ．Study on suitable method to simulate fluctuating wind pressure characteristics of standard high-rise building model based on LES［J］．Journal of Building Structures，2022，43（10）：95-103.
10 建筑结构荷载规范： ［S］．
11 MENTER F R ．Two-equation eddy-viscosity turbulence models for engineering applications［J］．AIAA Journal，1994，32（8）：1598-1599.
12 YANG Y， XIE Z， GU M ．Consistent inflow boundary conditions for modelling the neutral equilibrium atmospheric boundary layer for the SST k-ω model［J］．Wind and Structures，2017，24（5）：465-466.
13 LEVIAN M L， MEHTA K C， VANN W P ．Field measurements of pressures on the Texas Tech Building［J］．Journal of Wind Engineering and Industrial Aerodyna-mics，1991，38（1）：227-234.
14 孙虎跃 ．基于CFD和PIV技术的大跨屋盖表面流动结构研究［D］．南京：东南大学，2017.
15 SUARIS W， IRWIN P. Effect of roof-edge parapets on mitigating extreme roof suctions［J］．Journal of Wind Engineering and Industrial Aerodynamics，2010，98（1）： 483-491.
16 AZZI Z， HABTE F， ELAWADY A，et al ．Aerodynamic mitigation of wind uplift on low-rise building roof using large-scale testing［J］．Frontiers in Built Environment，2020，5（1）： 149-150.
17 RICHARDS P J， ROBINSON M ．Wind loads on porous structures［J］．Journal of Wind Engineering and Industrial Aerodynamics，1999，83（1/2/3）：455-465.
18 Engineering science data unit：Item 72009—2007 ［S］．
19 YU Y， YANG Y， XIE Z ．A new inflow turbulence generator for large eddy simulation evaluation of wind effects on a standard high-rise building［J］．Building and Environment，2018，138：300-313.
20 ZHOU L， TSE K T， HU G ．Aerodynamic correlation and flow pattern of high-rise building with side ratio of 3∶1 under twisted wind profile：a computational study［J］．Journal of Wind Engineering and Industrial Aerodynamics，2022，228（2）：105087-105088.
21 胡晓兵，杨易 ．基于NSRFG方法的标准地貌风场大涡模拟研究［J］．工程力学，2020，37（9）：112-122.
  HU Xiaobing， YANG Yi ．Research on NSRFG-based LES simulation for standard［J］．Engineering Mecha-nics，2020，37（9）：112-122.
22 LEVITAN M L， MEHTA K C ．Texas tech field experiments for wind loads part I：building and pressure measuring system［J］．Journal of Wind Engineering and Industrial Aerodynamics，1992，44（3）：1565-1576.
23 MEHTA K C， Levitan M L， Iverson R E，et al ．Roof corner pressures measured in the field on a low building［J］．Journal of Wind Engineering and Industrial Aerodynamics，1992，41（1/2/3）： 181-192.
24 HAM H J， BIENKIEWICZ B ．Wind tunnel simulation of TTU flow and building roof pressure［J］．Journal of Wind Engineering and Industrial Aerodynamics，1998，77（98）：119-133.
25 杨庆山，田玉基，陈波，等 ．行业标准《屋盖结构风荷载标准》的主要内容［J］．工程力学，2018，35（7）：1-6.
  YANG Qingshan， TIAN Yüji， CHEN Bo，et al ．Main contents of the standard for wind loads on roof structures［J］．Engineering Mechanics，2018，35（7）：1-6.
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