某商业街区建筑风压及风环境数值模拟  

Numerical Simulation of Wind Pressure and Wind Environment of a Commercial Quarter

作　　者：沈祺[1] 王国砚[1] 顾明[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《力学季刊》2007年第4期661-666,共6页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金创新研究群体科学基金(50321803);上海市建筑技术发展基金会预研究项目(YB05017)

摘　　要：针对上海市某商业街区建立了简化物理模型,采用离散化的数值模拟方法对该街区风场进行三维模拟研究。首先采用CAARC标准模型进行可行性验证,探讨了流体力学数值模拟的适用性和精确度。然后对该街区风场及建筑物的风场进行了数值模拟,分析了由于狭长T字型建筑布局而引起的巷道风效应。最后,讨论了街区群楼间间距及建筑布局等因素的改变对风场和风荷载的影响。研究结果表明,商业街区规划时应避免巷道风效应,并建议将行人高度风环境纳入考虑的范畴。A simplified physical model was setup according to a commercial quarter in Shanghai and 3D numerical simulation of wind field around the quarter was studied on the basis of Fluent 6. CAARC standard model was used to verify the feasibility of numerical method. The wind field around the quarter as well as the buildings was simulated and the bottle-neck wind effect was analyzed due to T-shape narrow position. Finally, the influences of change in factors like space mterval and location on the wind flow and wind load were discussed. The results suggest that the bottle-neck wind effect and wind environment at pedestrian elevation be involved in city planning of a commercial quarter.

关 键 词：流体力学 湍流 数值模拟 风灾 风环境 

分 类 号：TU311.2[建筑科学—结构工程]