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Wind loads on tall buildings in urban environments: The effects of surrounding buildings and double-skin façade porosity
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DOI：10.1016/j.jfluidstructs.2026.104526.png)
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Abstract
En 中文
Aerodynamic characteristics of a tall building with porous double-skin fa & ccedil;ade (PDSF) system were studied experimentally in a boundary layer wind tunnel. The focus is on the effect of surrounding buildings on the aerodynamics of the studied building. A tall building model with the geometric aspect ratio of 1:1:5 with a standard single-skin fa & ccedil;ade was used as a reference case. Two outer fa & ccedil;ade porosities of 25 % and 50 % were studied and compared with the single-skin, reference case. The studied building model was situated among eight dummy building models. The dimensions of all nine building models were the same. The aerodynamics of the studied building model was analyzed for the 0 degrees <= alpha <= 45 degrees flow incidence angles. A model of the suburban atmospheric boundary layer (ABL) was created to comply with the category III recommendations of the EN1991-1-4:2005 (2005) international standard. The experimental work was arranged in two sets. The effect of the PDSF porosity (25 % and 50 %) was studied first for the building model situated among dummy building models arranged at constant spacing D = 5d, where D is the distance between the building models, and d is the building model width. The effect of the distance between the building models on the aerodynamics of the studied building model was studied next for two spacings D = 3d and 5d. These unique experimental configurations were addressed in terms of aerodynamic loads and surface pressure on the studied building model. The PDSF systems on the building model proved not to substantially influence the across- and along-wind moment coefficients regardless of the spacing among building models. With an increase in the spacing among building models; however, the along-wind moment coefficient increases, while the across-wind moment coefficient remains nearly the same. The PDSF system yields a decrease in the mean pressure coefficient by 10 % to 20 % on all surfaces of the studied building model. With an increase in the spacing among building models, the studied building model becomes less sheltered by other building models, which causes an increase in the mean pressure coefficient on the studied building model. The application of the PDSF system yields a decrease in the peak of the standard deviation of the pressure coefficient by up to similar to 40 %.
Keywords:
Tall building
Porous double-skin fa & ccedil
ade
Surrounding buildings
Aerodynamic interference
Wind loads
Wind-tunnel experiments
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