頁籤選單縮合
題 名 | 開洞式高層建築表面風壓力之研究=A Research on the Surface Pressure of a Building with an Opeing |
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作 者 | 任森珂; 許茂雄; 周榮華; | 書刊名 | 建築學報 |
卷 期 | 33 2000.07[民89.07] |
頁 次 | 頁1-13 |
分類號 | 441.572 |
關鍵詞 | 邊界層; 雷諾數; 止流點; 風阻係數; 分離點; Boundary layer; Reynolds number; Stagnation point; Drag coefficient; Separation point; |
語 文 | 中文(Chinese) |
中文摘要 | 本文以兩個大小圾為7.2cm×7.2cm×21.6cm之縮小比例的長方體模型探討開洞對高層建築表面風壓力的影響,模型中之一在中間有比率為面積1/9之洞,將模型置於邊界層風洞設備中,以壓力孔量測模型表面風,用以模擬實際建築物在地面上受風壓作風的情形。吹襲風之角度有0°、30°、45°、60°及90°,而雷諾數則約為28800。 試驗結果顯示開可使建築物表面風壓降低,因而降低建築物承受之窅載,以風阻係數表示時,1/9之開洞比率可以減少20%之風阻,大於以目前建築規範計算所得之值。另外開洞建築物對附近環境造成的影響範圍之隨之縮小。 |
英文摘要 | This study uses scaled-down models to investigate the influence of an opening on the surface pressure of a tall building. The study was conducted in a turbulent boundary layer wind tunnel with surface pressure taps installed on the surface of the test models. Two rectangular models with the same size as 7.2cm* 7.2cm*21.6cm were tested, one with an opening while the other without. The Reynolds numbers were about 28800. The wind directions were 0, 30, 45, 60 and 90 degrees, respectively. Experimental results indicate that an opening will reduce the surface pressure on the building. Thus, drag force on the building with an opening will be reduced. An open area ratio of 1/9 will reduce the drag force by 20%, a value greater than that calculated form current building codes. Furthermore, the influence of a building to its environments will be reduced also when an opening is present on the building. |
本系統中英文摘要資訊取自各篇刊載內容。