建築物氣彈力反應數值模式建構與風洞試驗研究

Development of the Aero-elastic Numerical Model of Buildings and Wind Tunnel Study

本研究以風洞模型試驗資料為本，據以發展出預測大氣邊界層流中高層建築受風互制行為之數值方法，作為分析風域中高層建築動態反應之初步模式，進而應用風洞試驗與數值模擬各自之優勢，深入探討流場與結構相互影響之機制。研究中係以平坦開闊地形中三維方形截面之獨立柱體為基準問題，分別針對氣動力與氣彈力兩種情況進行風域中方柱形狀建築物之受風效應與動態反應之細部探討，繼而建立足以正確描述相應動力特性之數值計算模式，以供相關風力問題分析之用。

Based on the measurement results of wind tunnel tests, the goal of the study is to develop the numerical skills and methods in predicting the interactive dynamic behavior of a high-rise building and its surrounding wind flow. The achieved numerical model is expected to be used to analyze the dynamic response of a high-rise building at a preliminary design stage. In the study, a boundary-layer flow past an isolated cylinder with a square cross-section is considered the bench-mark problem. The flow effect and the structural responses are investigated under aero-dynamic and aero-elastic conditions. Accordingly, a numerical model, capable of correctly describing the related dynamic characteristics of the problem, is developed for future applications of related analysis.