- 摘 要
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(1 哈爾濱工業(yè)大學(xué) 150090； 2 汕頭大學(xué) 515063)
【提要】 通過幾何縮尺比為1∶300的剛性模型，對高層開洞建筑進(jìn)行了測壓風(fēng)洞試驗。研究了C類地面粗糙度類別，16個來流風(fēng)向條件下，兩種不同開洞率和三種不同開洞位置以及二個全封閉模型的各表面風(fēng)壓分布特性，并繪制了風(fēng)向平行于孔洞時模型外表面的風(fēng)壓系數(shù)等值線分布圖。根據(jù)試驗結(jié)果，對各種模型各個表面的平均風(fēng)壓系數(shù)、體型系數(shù)進(jìn)行了計算。通過與數(shù)值風(fēng)洞計算結(jié)果的對比及建筑荷載規(guī)范的比較，對建筑風(fēng)荷載體型系數(shù)測試和取值方面的一些問題進(jìn)行了初步的討論，提出了建議，供進(jìn)一步研究參考。
【關(guān)鍵詞】 開洞建筑 風(fēng)洞試驗 風(fēng)壓分布 風(fēng)荷載體型系數(shù)
Wind Tunnel Measuring Pressure Tests of Tall Buildings with Opening/Zhang Yaochun1, Ni Zhenhua2, Wang Chungang1, Qin Yun1(1 Harbin Institute of Tech., Harbin 150090，China; 2 Shantou University，Shantou 515063，China)
Abstract:Using rigid models with a geometrical scale of 1∶300, the wind tunnel tests of tall buildings with opening are conducted under the velocity in site terrain roughness of category C. The wind pressure distribution character on every
surface of models with two types of opening ratio and three different opening positions and two models without opening are measured in wind tunnel at sixteen different wind incidences. Contours of pressure coefficient distribution on model
surfaces are plotted at the coming wind parallel to the hole. Based on the results of tests, area pressure coefficients and wind load shape coefficients of all surfaces of models are computed. According to the comparison of the results between computed by computing wind engineering (Fluent 60) and the tests including the comparison of the full occluded condition to load code for the design of building structures, some questions about measuring and choosing the building wind load shape coefficient are primitively discussed. Several suggestions are put forward to supply reference for the further study.
Keywords:tall buildings with opening; wind tunnel test; wind pressure distribution; wind load shape coefficients
