圆柱形建筑双幕墙结构的内部风效应

Internal wind effect for double-skin facade of cylindrical building

摘要:

对圆柱形建筑双幕墙进行了多参数对比风洞试验,研究了圆弧双幕墙结构风致平均内压的空间分布特性,阐述了廊道内平均风压的分布机理,给出了风致平均内压的理论估算方法,并与试验结果进行对比,吻合较好.研究表明:圆弧型双幕墙在背风向时,廊道内的平均风压非常均匀,其风致平均内压的分布受外幕墙开孔率、廊道间距和来流风速的影响很小;而在迎风向和侧风向时,廊道内的平均风压分布不均匀,其风致平均内压的分布随开孔率和来流风速的增大、廊道间距的减小变得越来越不均匀.

Abstract:

A series of double-skin facades of cylindrical building was designed and multi-parameter comparison wind tunnel tests were conducted.The space distribution characteristic and mechanics of internal pressure acted on the corridor were studied,then the theoretical method for estimating the mean internal pressure coefficient was introduced emphatically,and the theoretical results were compared with the test ones.It is found that when the arc double-skin facade is in leeward side,the distribution of internal pressure acted on the corridor is even,and it is little influenced by the wind velocity,the opening ratio of the external skin facade and the spacing of corridor.When the arc double-skin facade is in windward side or crosswind side,the distribution of internal pressure acted on the corridor is uneven,and it will become more and more uneven by the decreased spacing of corridor and the increased wind velocity and opening ratio.