Mathematical model of torsional dynamic wind loads on rectangular tall buildings
Mathematical model of torsional dynamic wind loads on rectangular tall buildings
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DOI：
10.1016/j.engstruct.2003.09.004
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发表时间：
2001-10
影响因子：
0.8
通讯作者：
S. Liang;Shengchun Liu;Liangliang Zhang;M. Gu
中科院分区：
文献类型：
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作者：
S. Liang;Shengchun Liu;Liangliang Zhang;M. Gu
在边界层风洞中，通过一系列模型试验，研究了不同边长比矩形柱的风致动力扭矩。本文在实验研究的基础上，提出了转矩谱、均方根转矩系数、斯特鲁哈尔数的经验公式，以及转矩的相干函数。据此建立了矩形高层建筑风致动力扭矩的分析模型。将所提出的模型与风洞测量结果进行比较，验证了所开发的模型用于评估矩形高层建筑扭转动力风荷载的可靠性和适用性。提出了一种基于该模型的矩形高层建筑扭转风振响应的频域计算方法。
Wind-induced dynamic torque on rectangular cylinders with various side ratios is investigated through a series of model tests in a boundary layer wind tunnel. Based on the experimental investigation, this paper presents empirical formulae of torque spectra, RMS torque coefficients and Strouhal number, as well as coherence functions of torque. An analytical model of wind-induced dynamic torque on rectangular tall buildings is established accordingly. Comparisons of the results from the proposed model and the wind tunnel measurements verify the reliability and applicability of the developed model for evaluation of torsional dynamic wind loads on rectangular tall buildings. A calculation method is presented based on the proposed model to estimate wind-induced torsional responses of rectangular tall buildings in the frequency domain.