Assessment of computational fluid dynamic as a design tool for estimation of wind loads on unconventional skyscrapers in urban environment

Bin Lu, Qiu‐Sheng Li, Xu‐Liang Han
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Abstract

Computational fluid dynamic (CFD) has not been widely accepted as a design tool in current wind‐resistant structural design practices due to its contentious accuracy. To promote the application of CFD in wind‐resistant structural design, the accuracy of CFD should be comprehensively validated. However, most previous validation studies were focused on isolated generic or regular‐shaped buildings. This paper evaluates the accuracy of large eddy simulation (LES) in predicting the wind loads on a 600‐m‐high supertall building with a complex appearance in a realistic urban area against wind tunnel test results. The aerodynamic characteristics obtained from the LES and the wind tunnel test are compared and analyzed in detail, including wind pressure and force coefficients, wind force spectra, base moments, and correlations of the wind loads. This study aims to assess the performance and potential as well as the strengths and weaknesses of CFD in predicting wind loads on high‐rise buildings in an urban environment and promote its application to the wind‐resistant design of skyscrapers.
将计算流体力学作为估算城市环境中非常规摩天大楼风荷载的设计工具进行评估
在目前的抗风结构设计实践中,计算流体力学(CFD)作为一种设计工具还没有被广泛接受,原因是其精度存在争议。为促进 CFD 在抗风结构设计中的应用,应全面验证 CFD 的准确性。然而,以往的验证研究大多集中在孤立的一般或规则形状的建筑物上。本文对照风洞试验结果,评估了大涡流模拟(LES)在预测一栋 600 米高的超高层建筑的风荷载时的准确性。详细比较和分析了从大涡流模拟和风洞试验中获得的空气动力特性,包括风压和风力系数、风力频谱、基力矩和风荷载的相关性。本研究旨在评估 CFD 在预测城市环境中高层建筑风荷载方面的性能、潜力和优缺点,并促进其在摩天大楼抗风设计中的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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