高層建築於干擾效應下氣動力及氣彈力實驗結果比較

Interference Effects on High-rise Building Based on Aerodynamic and Aeroelastic Tests

羅元隆(Yuan-Lung Lo) ； 陳紀柔(Chi-Rou Chen)

《結構工程》 32卷4期 (2017/12) Pp. 110-129

https://doi.org/10.6849/SE.201712_32(4).0005

摘要

風力對高層建築物的反應為高層建築物設計中重要的一環，本研究以建築物之間風力所造成的干擾效應影響比較為主要探討項目，比較氣動力實驗與氣彈力實驗結果在干擾效應影響下的差異性。實驗結果討論分為三個部分，第一部分為探討干擾效應下氣動力實驗─風壓量測法之建物整體平均風力係數、擾動風力係數與風力干擾因子；第二部分為探討干擾效應下氣彈力實驗─位移量測法之位移擾動值與位移干擾因子；第三部分為比較第一部分與第二部分之相同流場下不同實驗方法之干擾效應結果差異。在不同的實驗方法中所得到的結構擾動反應值之變化與不同干擾位置之影 響甚大。且由氣彈力實驗結果中找出氣動力實驗無法預估的結構氣彈力現象。本研究期望能藉由兩種實驗方式指出結構物受干擾效應影響下可能發 生的遮蔽效應及增幅效應隨著干擾位置變動，而有不同的結果。

關鍵字

高層建築 ； 氣彈實驗 ； 干擾效應 ； 干擾因子

並列摘要

Wind effects on high-rise buildings are one of the most important topics in safety designs of structures, especially the target building is neighbored by another or even multiple high-rise buildings. This study intends to compare the differences between the results from the aerodynamic test and the results from the aeroelastic test. Physical scaling tests are planned in three parts: firstly the aerodynamic test is conducted in order to understand mean and fluctuating force coefficients of a square prism model with interference effects; secondly the aeroelastic test is conducted in order to examine the displacement variation under various velocities and terrain flows; thirdly the results from both tests are compared to find the differences by means of displacement estimation methodologies. It is found that, adopting the aerodynamic test for wind-induced response is not reliable compared to the aeroelastic test since the wind-induced response with/without interference effects are much more complicated and need more investigations in systematic aeroelastic test works.

並列關鍵字

High-rise building ； Aero-elastic test ； Interference effect ； Interference factor