Volume 38 Issue 6
Jun.  2021
Turn off MathJax
Article Contents
Abstract
References
DONG Xin, DING Jie-min, ZOU Yun-feng, ZUO Tai-hui. EFFECT OF ROUNDED CORNERS ON WIND LOAD CHARACTERISTICS OF RECTANGULAR TALL BUILDINGS[J]. Engineering Mechanics, 2021, 38(6): 151-162, 208. DOI: 10.6052/j.issn.1000-4750.2020.07.0451
Citation: DONG Xin, DING Jie-min, ZOU Yun-feng, ZUO Tai-hui. EFFECT OF ROUNDED CORNERS ON WIND LOAD CHARACTERISTICS OF RECTANGULAR TALL BUILDINGS[J]. Engineering Mechanics, 2021, 38(6): 151-162, 208. DOI: 10.6052/j.issn.1000-4750.2020.07.0451
shu

EFFECT OF ROUNDED CORNERS ON WIND LOAD CHARACTERISTICS OF RECTANGULAR TALL BUILDINGS

  • 1.

    Tongji Architectural Design (Group) Co. Ltd, Shanghai 200092, China

  • 2.

    Shanghai Institute of Disaster Prevention and Relief, Shanghai 200092, China

  • 3.

    School of Civil Engineering, Central South University, Changsha, Hu’nan 410075, China

More Information
  • Received Date: July 07, 2020
  • Revised Date: November 15, 2020
  • Available Online: November 30, 2020
    Abstract
  • Through pressure measurement in a wind tunnel, the wind pressure distribution, total forces and Strouhal numbers of rectangular tall buildings with different corner radius under various wind angles were investigated. The near wake characteristics of the rectangular tall buildings with and without rounded corners were observed by PIV experiment, through which the influence mechanism of rounded corners on the wind load characteristics of the buildings was revealed from the perspective of flow field. Results indicated that under critical wind angle, the separated shear layer reattaches on one side face to form a separation bubble. Therefore, the drag force attains a valley value, and the lift forces and Strouhal number reach peak values. Compared with the building without rounded corner, the critical wind angles of those with rounded corners are smaller. The parameters which control the Strouhal number are the transverse projected width and the distance between vortex pairs in the wake. For the rounded-corner buildings of specific rounded radius, the Strouhal number is increased within some wind angles. The drag force is closely related with vortex pairs in the wake. After adopting the rounded corner, the dimensions of the vortex pairs decrease, while the transverse velocity in the wake increases which implies the intense mixing motion of the fluid and weakened vortex pairs. It gives rise to the decreasing of drag forces. In addition, the irregularity and randomness of vortex shedding are enhanced, while its strength is attenuated by the rounded corner. Then the lift forces are caused to be decreased. However, this decrease tendency is not found for all wind angles.
    • FullText(HTML)
    • References (27)
  • [1]
    Sharma Ashutosh, Mittal Hemant, Gairola Ajay. Mitigation of wind load on tall buildings through aerodynamic modification: Review [J]. Journal of Building Engineering, 2018, 18: 180 − 194. doi: 10.1016/j.jobe.2018.03.005
    [2]
    Mooneghi Asghari Maryam, Kargarmoakhar Ramtin. Aerodynamic mitigation and shape optimization of buildings: Review [J]. Journal of Building Engineering, 2016, 6: 225 − 235. doi: 10.1016/j.jobe.2016.01.009
    [3]
    顾明, 张正维, 全涌. 降低超高层建筑横风向响应气动措施研究进展[J]. 同济大学学报(自然科学版), 2013, 41(3): 317 − 323. doi: 10.3969/j.issn.0253-374x.2013.03.001

    Gu Ming, Zhang Zhengwei, Quan Yong. Aerodynamic measures for mitigation of across-wind responses of super tall buildings: State of the art [J]. Journal of Tongji University (Natural Science), 2013, 41(3): 317 − 323. (in Chinese) doi: 10.3969/j.issn.0253-374x.2013.03.001
    [4]
    Elshaer Ahmed , Bitsuamlak Girma , Damatty EL Ashraf. Wind load reductions due to building corner modifications [C]// Proceedings of 22nd Annual Conference of the CFD Society of Canada, Toronto, Canada, The CFD Society of Canada, 2014.
    [5]
    王新荣, 顾明, 全涌. 圆角处理的断面宽厚比为2∶1的二维矩形柱体气动力系数的雷诺数效应研究[J]. 工程力学, 2016, 33(1): 64 − 71. doi: 10.6052/j.issn.1000-4750.2014.04.0321

    Wang Xinrong, Gu Ming, Quan Yong. Experimental study of reynolds number effects on aerodynamic forces for 2∶1 rectangular prisms with various rounded corners [J]. Engineering Mechanics, 2016, 33(1): 64 − 71. (in Chinese) doi: 10.6052/j.issn.1000-4750.2014.04.0321
    [6]
    Ambreen Tehmina , Kim Man-Hoe. Flow and heat transfer characteristics over a square cylinder with corner modifications [J]. International Journal of Heat and Mass Transfer, 2018, 117: 50 − 57. doi: 10.1016/j.ijheatmasstransfer.2017.09.132
    [7]
    Tamura Tetsuro , Miyagi Tessuya. The effect of turbulence on aerodynamic forces on a square cylinder with various corner shapes [J]. Journal of Wind Engineering and Industrial Aerodynamics, 1999, 83(1/2/3): 135 − 145. doi: 10.1016/S0167-6105(99)00067-7
    [8]
    Miran Sajjad, Sohn Hyun Chang. Numerical study of the rounded corners effect on flow past a square cylinder [J]. International Journal of Numerical Methods for Heat & Fluid Flow, 2015, 25(4): 686 − 702.
    [9]
    Miran Sajjad, Sohn Hyun Chang. Influence of incidence angle on the aerodynamic characteristics of square cylinders with rounded corners: A numerical investigation [J]. International Journal of Numerical Methods for Heat & Fluid Flow, 2016, 26(1): 269 − 283.
    [10]
    Kawai H. Effect of corner modifications on aeroelastic instabilities of tall buildings [J]. Journal of Wind Engineering and Industrial Aerodynamics, 1998, 74/75/76: 719 − 729. doi: 10.1016/S0167-6105(98)00065-8
    [11]
    Yen C Shun, Yang W Chen. Flow patterns and vortex shedding behavior behind a square cylinder [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2011, 99(8): 868 − 878. doi: 10.1016/j.jweia.2011.06.006
    [12]
    Huang R F, Lin B H,Yen S C. Time-averaged topological flow patterns and their influence on vortex shedding of a square cylinder in crossflow at incidence [J]. Journal of Fluids and Structures, 2010, 26(3): 406 − 429. doi: 10.1016/j.jfluidstructs.2010.01.003
    [13]
    Hu J C, Zhou Y, Dalton C. Effects of the corner radius on the near wake of a square prism [J]. Experiments in Fluids, 2006, 40(1): 106 − 118. doi: 10.1007/s00348-005-0052-2
    [14]
    杜晓庆, 田新新, 马文勇, 等. 圆角化对方柱气动性能影响的流场机理[J]. 力学学报, 2018, 50(5): 1013 − 1023. doi: 10.6052/0459-1879-18-123

    Du Xiaoqing, Tian Xinxin, Ma Wenyong, et al. Effects of rounded corner on aerodynamics of square cylinders and its flow mechanisms [J]. Chinese Journal of Theoretical and Applied Mechanics, 2018, 50(5): 1013 − 1023. (in Chinese) doi: 10.6052/0459-1879-18-123
    [15]
    Paul S S, Tachie M F, Adane K K. Structure of a rectangular cylinder with rounded leading edge at incidence [C]// Proceedings of The 39th AIAA Fluid Dynamics Conference, San Antonio, United States, American Institute of Aeronautics and Astronautics Inc, 2009.
    [16]
    Amin J A, Ahuja A K. Effects of side ratio on wind-induced pressure distribution on rectangular buildings [J]. Journal of Structures, 2013, 2013: Article ID 176739.
    [17]
    Liu Yi, Kopp A Gregory, Chen Shuifu. Effects of plan dimensions on gust wind loads for high-rise buildings [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2019, 194: 103980. doi: 10.1016/j.jweia.2019.103980
    [18]
    Mou Ben, He Baojie, Zhao Dongxue, et al. Numerical simulation of the effects of building dimensional variation on wind pressure distribution [J]. Engineering Applications of Computational Fluid Mechanics, 2017, 11(1): 293 − 309. doi: 10.1080/19942060.2017.1281845
    [19]
    Ning Lin, Letchford Chris , Tamura Yukio, et al. Characteristics of wind forces acting on tall buildings [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2005, 93(3): 217 − 242. doi: 10.1016/j.jweia.2004.12.001
    [20]
    Mannini Claudio, Marra Maria Antonino, Pigolotti Luca, et al. The effects of free-stream turbulence and angle of attack on the aerodynamics of a cylinder with rectangular 5∶1 cross section [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2017, 161: 42 − 58. doi: 10.1016/j.jweia.2016.12.001
    [21]
    Dutta Sushanta, K P Panigrahi, K Muralidhar. Experimental investigation of flow past a square cylinder at an angle of incidence [J]. Journal of Engineering Mechanics, 2008, 134(9): 788 − 803. doi: 10.1061/(ASCE)0733-9399(2008)134:9(788)
    [22]
    Carassale Luigi, Freda Andrea, Marre-Brunenghi Michela. Experimental investigation on the aerodynamic behavior of square cylinders with rounder corners [J]. Journal of Fluids and Structures, 2014, 44: 195 − 204. doi: 10.1016/j.jfluidstructs.2013.10.010
    [23]
    Alminhana G W, Braun A L, Loreda-Souza A M. A numerical-experimental investigation on the aerodynamic performance of CAARC building models with geometric modifications [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2018, 180: 34 − 48. doi: 10.1016/j.jweia.2018.07.001
    [24]
    庄翔, 董欣, 郑毅敏, 等. 矩形高层建筑非高斯风压时程峰值因子计算方法[J]. 工程力学, 2017, 34(7): 177 − 185. doi: 10.6052/j.issn.1000-4750.2016.02.0134

    Zhuang Xiang, Dong Xin, Zheng Yimin, et al. Peak factor estimation methods of non-gaussian wind pressures on a rectangular high-rise building [J]. Engineering Mechanics, 2017, 34(7): 177 − 185. (in Chinese) doi: 10.6052/j.issn.1000-4750.2016.02.0134
    [25]
    岳光强, 马文勇, 刘庆宽, 等. 风向角对方形断面细长结构气动力特性的影响[J]. 工程力学, 2017, 34(增刊): 5 − 10. doi: 10.6052/j.issn.1000-4750.2016.04.S044

    Yue Guangqiang, Ma Wenyong, Liu Qingkuan, et al. Effects of wind direction on characteristics of aerodynamics on a square slender [J]. Engineering Mechanics, 2017, 34(Suppl): 5 − 10. (in Chinese) doi: 10.6052/j.issn.1000-4750.2016.04.S044
    [26]
    Lim Chang Hee, Thomas T G, Castro P Ian. Flow around a cube in a turbulent boundary layer: LES and experiment [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2009, 97(2): 96 − 109. doi: 10.1016/j.jweia.2009.01.001
    [27]
    Kumar R Ajith, Chang Hyun Sohn , Gowda B H Lakshmana. A PIV study of the near wake flow features of a square cylinder: influence of corner radius [J]. Journal of Mechanical Science and Technology, 2015, 29(2): 527 − 541. doi: 10.1007/s12206-015-0113-2
    • Related Articles

Catalog

    Get Citation
    PDF
    XML

    Article Metrics

    Article views (1187) PDF downloads (102) Cited by()
    Related

    京ICP备18030614号

    Copyright © 《工程力学》编辑部

    Address: North-Star Times Tower, No.8 Beichendong Road, Chaoyang District, Beijing, China China Pos: 100084

    Tel: (010)62788648 Fax: 021-64253812 Email: gclxbjb@tsinghua.edu.cn

    Supported by: Beijing Renhe Information Technology Co.,Ltd.  Baidu Analytics

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return