矩形斷面高層建築之橫風向等效靜態設計風荷載模式之研究

AN ACROSSWIND EQUIVALENT STATIC WIND LOAD MODEL FOR RECTANGULAR SHAPED TALL BUILDINGS

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

《中國土木水利工程學刊》 31卷8期 (2019/12) Pp. 759-766

https://doi.org/10.6652/JoCICHE.201912_31(8).0009

摘要

本文根據風洞試驗數據，建立了矩形高層建築的橫風向等效靜態設計風荷載模式。在本文所提出的橫風向風力頻譜經驗式中，給出了關鍵參數的具體物理意義。如此，經驗模式更符合目前對於高層建築所受橫風向風荷載的理解。未來在得到更多實驗數據的情況下，研究人員可以改進模式中各參數的數學式。將依據本文模式所得之風力係數和風力頻譜與風洞試驗數據進行比較結果令人滿意。本文使用大量的原型高層建築，以建築基底彎矩為標的，進行了本文建構模式與風洞試驗數據間的比較研究，在大多數情況下，橫風向等效靜態設計風荷載模式所估算的建築基底彎矩誤差均在10%範圍內或略為保守。結果令人滿意。

關鍵字

高層建築 ； 橫風向風力 ； 風洞試驗 ； 等效靜態風荷載

並列摘要

In this article, an acrosswind equivalent static wind load model for rectangular shaped tall buildings were proposed based on wind tunnel data. In the proposed acrosswind force spectral model, specific physical meanings are given to the key parameters. In such a way, the empirical model is more in line with current understanding on building acrosswind loads, it can be improved by others with support of additional data. The lift coefficients and spectral estimates produced by the proposed model were compared with wind tunnel measurements with satisfactory results. A large number of prototype tall buildings were used to study the model performance in term of building overturning moment. For most cases, the base moment yielded by proposed ESWL model are either within 10% error bound or slightly conservative.

並列關鍵字

tall building ； acrosswind load ； wind tunnel ； equivalent static wind Load