［摘要］高层建筑（群）风效应与地貌条件相关，分析掌握其内在关系是建筑布局规划和抗风设计的重要前提。基于雷诺时均模拟方法（RANS），引入具有分离流预测优势的SST kω湍流模型，以某高层建筑单体及群体风场为对象，模拟4类地貌条件下的风效应场，侧重分析人行高度(2m)风速场以及建筑立面的风压分布特性。分析结果表明，地貌除对人行高度的风速场影响明显外，对高层建筑表面风压系数影响也较为可观，实际工程应适当考虑地貌效应。
［关键词］高层建筑（群）；不同地貌；风效应；数值模拟
中图分类号：TU312+.1，V211.3文献标识码：A文章编号：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
*安徽省自然科学基金项目(11040606M116)。
作者简介：王辉，博士，副教授，Email:hfutwh@sina.com。
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