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［摘要］高層建筑（群）風(fēng)效應(yīng)與地貌條件相關(guān)，分析掌握其內(nèi)在關(guān)系是建筑布局規(guī)劃和抗風(fēng)設(shè)計(jì)的重要前提?；诶字Z時(shí)均模擬方法（RANS），引入具有分離流預(yù)測(cè)優(yōu)勢(shì)的SST kω湍流模型，以某高層建筑單體及群體風(fēng)場(chǎng)為對(duì)象，模擬4類地貌條件下的風(fēng)效應(yīng)場(chǎng)，側(cè)重分析人行高度(2m)風(fēng)速場(chǎng)以及建筑立面的風(fēng)壓分布特性。分析結(jié)果表明，地貌除對(duì)人行高度的風(fēng)速場(chǎng)影響明顯外，對(duì)高層建筑表面風(fēng)壓系數(shù)影響也較為可觀，實(shí)際工程應(yīng)適當(dāng)考慮地貌效應(yīng)。
［關(guān)鍵詞］高層建筑（群）；不同地貌；風(fēng)效應(yīng)；數(shù)值模擬
中圖分類號(hào)：TU312+.1，V211.3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2011)10-0143-03
Numerical analysis of terrain influence on wind effects around tall buildings
Wang Hui(School of Civil Engineering, Hefei University of Technology, Hefei 230009, China)
Abstract:The wind effects on tall buildings are affected by the terrain features. It is necessary to acquire the law of terrain influence on wind effects before the layout and structural windresistant design are accomplished. Based on the Reynolds time-averaged methods (RANS), where SST kω turbulence model which had the advantage of forecasting the separated flow was used, the wind flow around both a single tall building and buildings complex were simulated numerically. The wind velocity and wind pressure were simulated for four kinds of terrains. Then the wind velocity field at pedestrian height level(2m), and wind pressure distribution on  facades of buildings were compared. The results indicate that the terrain influence on flow at pedestrian height level is obvious. In addition, the terrain also has  considerable influence on wind pressure coefficient on tall buildings. The terrain influence should be considered reasonably in practical engineering.
Keywords:tall building(complex); different terrain; wind effects; numerical simulation
*安徽省自然科學(xué)基金項(xiàng)目(11040606M116)。
作者簡介：王輝，博士，副教授，Email:hfutwh@sina.com。
參考文獻(xiàn)
［1］ LIN NING,  LETCHFORD CHRIS,  TAMURA YUKIO, et al. Characteristics of wind forces acting on tall buildings［J］. Journal of Wind Engineering and Industrial Aerodynamics, 2005, 93(3): 217-242.
［2］楊偉, 黃鵬, 顧明. 高層建筑風(fēng)致靜力干擾效應(yīng)的試驗(yàn)和數(shù)值研究［J］. 同濟(jì)大學(xué)學(xué)報(bào), 2004, 32(2): 152-156.
［3］張敏, 樓文娟, 何鴿俊，等. 群體高層建筑風(fēng)荷載干擾效應(yīng)的數(shù)值研究［J］. 工程力學(xué), 2008, 25(1): 179-185.
［4］ZHANG AISHE,  GU MING. Wind tunnel tests and numerical simulations of wind pressures on buildings in staggered arrangement［J］. Journal of Wind Engineering and Industrial Aerodynamics, 2008, 96(10/11): 2067-2079.
［5］MENTER F R. Two-equation eddy-viscosity turbulence models for engineering applications［J］. AIAA, 1994, 32(8): 269-289.
［6］曾鍇, 汪叢軍, 黃本才，等. 計(jì)算風(fēng)工程中幾個(gè)關(guān)鍵影響因素的分析與建議［J］. 空氣動(dòng)力學(xué)學(xué)報(bào), 2007, 25(4): 504-508.
［7］王輝.平面布局對(duì)高層建筑群風(fēng)壓影響的數(shù)值研究［J］.建筑結(jié)構(gòu)，2011,41(6)：110\|113,129.