An Examination of the Gust Effect Factor for Rigid High-Rise Buildings

Frontiers in Built Environment

Yi Liu¹  Shui-fu Chen¹  Gregory A. Kopp² 

[1] Hangzhou, China;London, ON, Canada;

关键词: wind loads;    building aerodynamics;    gust effect factor;    high-rise biuldings;    aerodynamic admittance function;   

DOI  :  10.3389/fbuil.2020.620071

来源: Frontiers

【 摘 要 】

In order to systematically investigate the gust effect factor for rigid buildings, the derivation of the gust effect factor in ASCE 7–16 is carefully reviewed and scale model pressure tests were carried out for rectangular-plan high-rise buildings with plan aspect ratios ranging from 0.11 to 9. The gust effect factor and the aerodynamic admittance function (AAF) for area-averaged pressure coefficients and base drag coefficients were obtained and discussed in detail. The results show that the AAF has direct influence on the value of the gust effect factor, depending on whether effects of non-contemporaneous gust actions or body-generated turbulence are playing a leading role. The ASCE 7–16 gust effect factor for rigid buildings underestimates the measured values for individual walls due to differences in the AAF, peak factors, and the employment of the 3 s moving average filter. However, the ASCE 7–16 gust factor for overall drag is estimated within 5% or better.

【 授权许可】

CC BY