(1 湖南大学建筑安全与节能教育部重点实验室， 长沙 410082；  2 香港城市大学， 香港 999077)

［摘要］采用大涡模拟(LES)方法，以长宽高之比为1-0∶1-0∶0-5的平屋盖建筑为对象，在建筑立面上引入阳台后，对不同风向角下模型表面的风荷载进行了数值模拟计算。通过与风洞试验结果的对比发现，大涡模拟能较好地预测建筑物表面的风压分布。在此基础上，重点探讨了不同风向角下立面阳台对建筑物表面风压和绕流风场的影响，同时考虑了不同来流风场条件的变化对阳台作用效应的影响。研究结果表明，立面阳台的引入会明显改变气流在建筑表面的分离、再附着形式，使得表面风压沿高度方向上的分布发生变化；引起的变化主要集中在建筑物的迎风面，特别是在迎风面最上面一排阳台及其以上区域；随着来流风向角的增加，阳台对建筑迎风面上风压的影响逐渐加大。

［关键词］大涡模拟； 阳台； 风荷载； 数值模拟； 迎风面

中图分类号：TU311-41文献标识码：A文章编号：1002-848X(2017)07-0092-09

Numerical simulation study of the effect of balconies on wind loadings on surfaces of low-rise buildings

Liu Shun1, Li Qiusheng1,2

(1 Key Laboratory of Building Safety and Energy Efficiency of Hunan University, Changsha 410082, China;2 City University of Hong Kong, Hong Kong 999077, China)

Abstract:Using the large eddy simulation (LES) method, a series of numerical simulation calculations were conducted on the wind loadings with different wind angles on flat roof building (length∶width∶height=1-0∶1-0∶0-5) with balconies in building facades. It is shown that LES can well predict wind pressure distribution on building surfaces when compared with the wind tunnel test results. Based on this, the effects of facade balcony on the wind pressure and wind flow on the surface of the building under different angles of wind directions were discussed. At the same time, the influence of change of different flow field conditions on the effect of the balcony was considered. The results show that the introduction of the facade balcony will obviously change the separation and reattachment of the airflow on the surface of the building, so that the distribution of the wind pressure on surface along the height direction changes. The change mainly concentrates on the windward facade of the building, especially in the top row of the balcony in the windward facade and the areas above. With the increase in the angles of wind directions of incident wind flow, the effect of balconies on the wind pressure on the windward fa-ade of the building gradually increases.

Keywords:large eddy simulation; balcony; wind loading; numerical simulation; windward facade

*国家自然科学基金资助项目(51408062, 51178179)。

通讯作者：李秋胜，教授，博士生导师，Email: bcqsli@cityu.edu.hk。