矩形斷面高層建築扭轉向設計風載重之研究

A TORSIONAL DESIGN WIND LOAD MODEL FOR HIGH-RISE RECTANGULAR SECTION BUILDINGS

10.6652/JoCICHE.202309_35(5).0003

賴子晴(Tzu-Ching Lai)；王人牧(Jenmu Wang)；蔡明樹(Ming-Shu Tsai)；傅仲麟(Chung Lin Fu)；鄭啟明(Chii-Ming Cheng)

高層建築 ； 扭轉向風力 ； 風洞試驗 ； 等效靜態風載重 ； tall building ； torsional load ； wind tunnel ； equivalent static wind load

中國土木水利工程學刊

35卷5期（2023 / 09 / 01）

463 - 472

繁體中文;英文

本文建構一套於矩形高層建築的扭轉向等效靜態設計風載重模式。先是藉由大量的風洞實驗數據，探討扭轉向風力係數與頻譜，並以此做為基石，進一步提出扭轉向設計風載重模式。而對於模式中所使用之各重要參數，賦予具有物理意義的因子，使預測模式合理反應氣動力現象，以利於未來研究人員改善模式中各參數之數學式。最後通過風洞實驗數據，來驗證本文預測模式提出之風力係數和風力頻譜公式準確性，分析結果表現良好，並再以建築基底彎矩為標的，對大量的原型高層建築進行了本文建構模式與風洞試驗數據間的比較研究。計算結果顯示，此二者所估算的建築基底彎矩誤差大多在15%範圍內或略為保守，另外與我國耐風規範相比，較精準許多。

This research constructed an equivalent static design wind load model of torsional direction for rectangular high-rise buildings. Based on a large number of wind tunnel experimental data, torsional wind force coefficients and spectra are studied first, which served as the foundation for further proposing the torsional design wind load model. Factors with physical meaning were given to the important parameters used in this model to benefit improvement of the mathematical formulas of each parameter in the model by future researchers. Wind tunnel data was used to verify the accuracy of the wind force coefficient and spectra formulas proposed in this paper, and the results performed well. Furthermore, taking the building overturning moment as a criterion, the comparisons between the presented model and wind tunnel measurements over a large number of prototype high-rise buildings were conducted. In most cases, the errors of the building overturning moment estimated by the torsional equivalent static design wind load model are mostly within 15% or slightly conservative. In addition, the accuracy is better than Taiwan wind code.

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