透风性女儿墙对尖屋顶风荷载的影响

应用风洞模拟方法研究了透风性女儿墙对尖屋顶风荷载的影响。女儿墙共有七种,包括三种孔型、两种截面和三种孔隙度。屋顶角为19°。在约为1%和5%两种湍流度的均匀气流中测量了这些女儿墙引起的屋顶风压分布的变化,包括平均风压、峰值风压、风压脉动的均方根值。试验结果表明:七种女儿墙都能程度不同地减小屋顶的平均风压与负的峰值风压,其中第7种女儿墙效果最好;湍流度增大会明显提高风压脉动的均方根值,使峰值风压增大。

THE EFFCT OF PARAPETS WITH OPENING ON WIND LOADING OF AN OBLIQUE ROOF

The study on the effect of parapets with opening on thewind loads of an oblique roof has been conducted.There are seven typesof parapets including three types of opening configration,two types ofcross section and three kinds of porosity.The roof angle is 19 degree.The turbulent intensity of coming flow has two kinds-0.01 and 0.05.The variations of wind pressure,including mean pressure,peak pressure,RMS of pressure fluctuation,caused by parapets were measured.Theexperimental results suggest that all parapets of seven types can invarying degrees deduce the mean pressure and peak pressure of the roofand that the number 7 parapet has the best effect among the seven types,and that when the turbulent intensity of coming flow increases the RMSof pressure fluctuation and peak pressure increase also.