This paper aims to systematically study the across-wind loads of rectangular-shaped tall buildings with aerodynamic modifications and propose refined mathematic models accordingly. This study takes the CAARC (Commonwealth Advisory Aeronautical Research Council) standard tall building as a benchmark model and conducts a series of pressure measurements on the benchmark model and four CAARC models with different round corner rates (5%, 10%, 15% and 20%) in a boundary layer wind tunnel to investigate the across-wind dynamic loads of the typical tall building with different corner modifications. Based on the experimental results of the five models, base moment coefficients, power spectral densities and vertical correlation coefficients of the across-wind loads are compared and discussed. The analyzed results shown that the across-wind aerodynamic performance of the tall buildings can be effectively improved as the rounded corner rate increases. Taking the corner round rate and terrain category as two basic variables, empirical formulas for estimating the across-wind dynamic loads of CAARC standard tall buildings with various rounded corners are proposed on the basis of the wind tunnel testing results. The accuracy and applicability of the proposed formulas are verified by comparisons between the empirical formulas and the experimental results.

中文翻译：

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经空气动力学修改的矩形高层建筑横风荷载的精细数学模型

本文旨在系统地研究矩形高层建筑气动修改后的横向风荷载，并据此提出细化的数学模型。本研究以 CAARC（联邦航空研究委员会）标准高层建筑为基准模型，对基准模型和四种不同圆角率（5%、10%、15% 和 20%）的 CAARC 模型进行一系列压力测量。 %) 在边界层风洞中研究具有不同拐角修改的典型高层建筑的横向风动力载荷。基于5个模型的实验结果，对横风荷载的基矩系数、功率谱密度和垂直相关系数进行了比较和讨论。分析结果表明，随着圆角率的增加，高层建筑的横风气动性能可以得到有效改善。以圆角率和地形类别为两个基本变量，在风洞试验结果的基础上，提出了CAARC标准不同圆角高层建筑的横风动荷载估算经验公式。通过经验公式与实验结果的对比，验证了所提公式的准确性和适用性。在风洞试验结果的基础上，提出了CAARC标准各种圆角高层建筑的横向风动荷载估算经验公式。通过经验公式与实验结果的对比，验证了所提公式的准确性和适用性。在风洞试验结果的基础上，提出了CAARC标准各种圆角高层建筑的横向风动荷载估算经验公式。通过经验公式与实验结果的对比，验证了所提公式的准确性和适用性。