Integrated Impacts of Building Space Ratio and Wind Direction on Pedestrian-level Wind Environment around High-rise Buildings with Equilateral Triangle Arrangement

Document Type : Regular Article

Authors

1 State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, China

2 Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China

3 Department of Mathematics and Physics, Shijiazhuang Tiedao University, Shijiazhuang 050043, China

4 School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China

10.47176/jafm.17.9.2511

Abstract

The issue of pedestrian-level wind environments around high-rise buildings is closely related to the comfort and safety of human settlements. In this paper, we study the effects of different wind direction angles and spacing ratios on the wind environment at pedestrian heights around buildings arranged in an equilateral triangle configuration. Three-dimensional steady-state numerical simulation was employed, with the standard k-ε model selected as the turbulence model. Wind speed ratios and different area ratio parameters are used to quantitatively express the degree and range of influence of wind speed by buildings. The results show that the maximum wind speed ratio at the corner of a building is greatly affected by the wind direction angle, with 45°, 135°, and 157.5° being the unfavorable wind direction angles. Conversely, the area ratio of different areas is greatly affected by the spacing ratio. As the spacing ratio increases, the mutual interference effect between buildings weakens, resulting in a better pedestrian wind environment. Owing to the unique layout of the building group, different degrees of ventilation corridors are formed among the three buildings. The wind speed amplification effect in the corridors is more significant, and the areas with poor wind environments are concentrated in these corridors.

Keywords


American Society of Heating, Refrigeration and Air-Conditioning Engineers (2005). ASHRAEF undamentals Handbook, SIED, Atlanta, USA.
Blocken, B., Stathopoulos, T., & Van Beeck, J. P. A. J. (2016). Pedestrian-level wind conditions around buildings: review of wind-tunnel and CFD techniques and their accuracy for wind comfort assessment. Building and Environment, 100, 50–81. https://doi.org/10.1016/j.buildenv.2016.02.004.
Bowen, Y., Min, W., Qiao, Y., Yong, C., Zhenru, S., Qiusheng, L., & Xvhong, Z. (2021). Study on effects of tall building shape and layout on pedestrian-level wind environment in the urban area. Journal of Hunan University Natural Sciences, 11, 61-71. (in Chinese). https://doi.org/10.16339/j.cnki.hdxbzkb.2021.11.007.
Chenggang, W., Feng, L., Yongwei, W., & Hongnian, L. (2016). Experimental study of the impact of high-density building clusters and high-rise buildingon the wind environment. Transactions of Atmospheric Sciences, 39(01), 133-139. (in Chinese). https://doi.org/10. 13878 /j. cnki. dqkxxb. 20130107001
GB50009. (2012). Load code for the design of building structures. China Architecture Industry Press Beijing, Chinese.
GB50016. (2014). Code for fire protection design of buildings. China Planning Press Beijing, Chinese.
GB50180. (1993). Code of urban residential district planning & design. China Planning Press Beijing, Chinese.
GB50352. (2005). Code for design of civil buildings. China Planning Press Beijing, Chinese.
Hanqing, W., & Stathopoulos. T. (1994). Further experiments on Irwin's surface wind sensor. Journal of Wind Engineering and Industrial Aerodynamics, 53(3). 441-452. https://doi.org/10.1016/0167-6105(94)90095-7
Hassan, S., Molla, M. M., Nag, P., Akter, N., & Khan, A. (2022). Unsteady RANS simulation of wind flow around a building shape obstacle. Building Simulation, 15, 291–312. https://doi.org/10.1007/s12273-021-0785-8.
Hemant, M., Ashutosh, S., & Ajay, G. (2018). Numerical simulation of pedestrian level wind flow around buildings: Effect of corner modification and orientation. Journal of Building Engineering, 22, 314-326. https://doi.org/10.1016/j.jobe.2018.12.014
Hemant, M., Ashutosh, S., & Ajay, G. (2019). Investigation of pedestrian-level wind environment near two high-rise buildings in different arrangements. Advances in Structural Engineering, 22(12), 2620-2634. https://doi.org/10.1177/1369433219849832
Irwin, A. (1981). simple omnidirectional sensor for wind-tunnel studies of pedestrian-level winds. Journal of Wind Engineering and Industrial Aerodynamics, 7(3), 219-239. https://doi.org/10.1016/0167-6105(81)90051-9
Jie, Q. (2010). Research on wind environment characteristics of building bottom aerial [Master Thesis, Chongqing University], Chongqing.
Lian, S., Chunchao, T., Yan, H., Kuo, W., Chunguang, L., & Chunsheng, C. (2021). Experimental study on urban wind environment influenced byadjacent hing-rise building. Journal of Civil and Environmental Engineering, 43(06), 103-112. (in Chinese). https://doi.org/10.11835/j.issn.2096-6717.2020.127
Ricci, A., Kalkman I., Blocken B., Burlando M., & Repetto M.P. (2020). Impact of turbulence models and roughness height in 3D steady RANS simulations of wind flow in an urban environment. Building and Environment, 171. https://doi.org/10.1016/j.buildenv.2019.106617.
Richard, A. (1980). Politics of pedestrian level urban wind control. Building and Environment, (24), 291-295. https://doi.org/10.1016/0360-1323(89)90022-X
Sadia, S., Sahrish, B. N., Muhammad, A., & Molla, M. M. (2023). Large-eddy simulation of airflow dynamics around a cluster of buildings. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science. https://doi: 10.1177/09544062231172666.
Stathopoulos, T., Wu, H., & Bedard, C. (1992). Wind environment around buildings: a knowledge-based approach. Journal of Wind Engineering & Industrial Aerodynamics, 44, 2377–2388. https://doi.org/10.1016/0167-6105(92)90028-9.
Toparlar, Y., Blocken, B., Vos, P., Van Heijst, G. J. F., Janssen, W. D., Van Hooff, T., Montazeri, H., & Timmermans, H. J. P. (2014). CFD simulation and validation of urban microclimate: a case study for Bergpolder Zuid, Rotterdam. Building and Environment, 83, 79–90. https://doi.org/10.1016/j.buildenv.2014.08.004.
Tsang, C. W., Kwok, K. C. S., & Hitchcock, P. A. (2011). Wind tunnel study of pedestrian level wind environment around tall buildings: Effects of building dimensions, separation and podium. Building and Environment, 49, 167-181. https://doi.org/10.1016/j.buildenv.2011.08.014
Tse, K. T., Xuelin, Z., Weerasuriya, A. U., Li, S. W., Kwok, K. C. S., Mak, C. M., & Niu, J. (2017). Adopting ‘lift-up’ building design to improve the surrounding pedestrian-level wind environment. Building and Environment, 117, 154–165.https://doi.org/10.1016/ j.buildenv.2017.03.011.
Wenfeng, H., Tong, Z., & Xing, C. (2019). Wind environment assessment of typical building grous by using CFD numerical simulation. Journal of Hefei University of Technology (Natural Science), 42(03), 415-421. (in Chinese) https://doi.org/10.3969/j.issn.10035060.2019.03.019.
Xiaoda, X., Qingshan, Y., Akihito, Y., & Yukio, T. (2017). Characteristics of pedestrian-level wind around super-tall buildings with various configurations. Journal of Wind Engineering & Industrial Aerodynamics, 166, 61-73. https://doi.org/10.1016/j.jweia.2017.03.013
Xiaoyu, Y., Rin, X., Kan, Q., & Grace, D. (2018). Design analysis of hing-rise buildings in the view of wind environment—A case study of four seasons green block in Hangzhou Qianjiang new city. Journal of Xi'an University of Architecture & Technology (Natural Science), 50(06), 884-889+900. (in Chinese). https://doi.org/10.15986/j.1006-7930.2018.06.018
Yi, Y., Xinyang, J., Liguo, Y., Hai, J., Ming, X., & Zongyi, Z. (2011). Numerical simulation research on pedestrian wind environment and optimization design of high-rise buildings. Building Science, 27(01), 4-8. (in Chinese). https://doi.org/10.13614/j.cnki.111962/tu.2011.01.008
Yidong, H., Zhuang, Z., & Yuanbo, Y. (2016). Sensitivity analysis of key points of green building wind environment simulation technology. Building Science, 32(08), 712+32. https://doi.org/10.13614/j.cnki.111962/tu.2016.08.02.
Zahid Iqbal, Q. M., & Chan, A. L. S. (2016). Pedestrian level wind environment assessment around group of high-rise cross-shaped buildings: effect of building shape, separation and orientation. Building and Environment, 101, 45–63. https://doi.org/10.1016/j.buildenv.2016.02.015.
Zhuangning, X., Yu, L., & Xianfeng, Y. (2020). Experimental investigation on pedestrian-level wind environment around a hing-rise building. Journal of Tongji University (Natural Science), 48(12), 1726-1732. (in Chinese) https://doi.org/10.11908/j.issn.0253-374x.20197