低层房屋屋面平均风压的风洞试验和数值模拟  

Wind tunnel test and numerical simulation of mean wind pressures on roof of low-rise buildings

作　　者：顾明[1] 赵雅丽[1] 黄强[1] 黄鹏[1] 全涌[1] 谢壮宁[2] 

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 [2]汕头大学土木学院,广东515063

出　　处：《空气动力学学报》2010年第1期82-87,共6页Acta Aerodynamica Sinica

基　　金：国家自然科学基金创新研究群体科学基金(50321803);国家自然科学基金(50708082;50778108);国家科技支撑计划课题(2006BAJ06B05)联合资助

摘　　要：对我国沿海地区常见低层双坡房屋模型进行风洞试验,获得屋面平均风压分布;同时对相同形状的实际建筑采用数值模拟方法计算了屋面的风压分布。结果表明数值模拟和风洞试验结果在整体趋势上吻合较好。这表明数值模拟方法可以和风洞试验相结合,为低层房屋的抗风设计提供参考依据。结果还表明,该类房屋的屋檐、屋脊和山墙顶边等房屋外表面拐角区域有高负压、高负压梯度出现,特别是迎风向挑檐部分的上下表面的净风压会较大,因此会对挑檐产生较大的升力,这在沿海多台风地区的低层房屋设计时应特别注意。The wind tunnel test and numerical stimulation of a typical low-rise gable roofed building with eave were performed to obtain mean wind pressure distributions acting on the building roof.In general,the results obtained from the test and the simulation match well.This indicates that the numerical simulation approach may be a power tool for wind-resistant study on low-rise buildings.Furthermore,the results show that high minus wind pressure and pressure gradient can be appear at turning corners,such as eaves,ridge of roof and top of gable,etc.Especially the upward wind force on overhang eaves could be large,which should be paid attention to in designing of such buildings.

关 键 词：低层房屋 平均风压 风洞试验 数值模拟 

分 类 号：V211.7[航空宇航科学与技术—航空宇航推进理论与工程] V211.3