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Surface Wind Pressure and Aerodynamic Coefficients of Canopy Affiliated to High-rise Buildings
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    Abstract:

    The wind tunnel test method is employed to study the wind pressure characteristic of the canopy affiliated with high-rise buildings. The variation of wind pressure coefficient, wind pressure correlation, non-Gaussian, and overall lift coefficient with the wind direction angle is analyzed. The design wind loadings on the building envelope are also given. Finally, the influence of tilt angle and cantilevered length on the overall lift coefficient is investigated. Studies show that the maximum wind pressure coefficients of the upper surface of the canopy affiliated with the building reach almost 1.4 in the wind-facing direction, which can be attributed to the fact that the airflow is blocked by the high-rise building and then turned down on the canopy. The overall press coefficients of the upper and lower surface reach their maximum values in the wind-facing direction, and the coefficients are 1.24 and 0.76, respectively. The overall lift coefficients on the upper and lower surface reach their maximum values at the side direction, and their values are 1.13 and 1.01, respectively. After being superimposed on the upper and lower surface, the pressure presents a higher non-Gaussian distribution property than those on each surface. The lift coefficients of the upper and lower surfaces show a Gaussian distribution in the wind direction of 0°~70° and a non-Gaussian distribution in the wind direction of 80°~180°. The positive extreme wind pressure coefficient on the upper surface of the canopy affiliated with the building is higher than that on the lower surface. The overall lift coefficients of the canopy increase in sequence with the attack angle of -10°, 0°, and 10°.

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  • Online: July 31,2023
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