Effects of Permeability on the Dynamic Properties and Weathertightness of Double Skin Curtain Walls

Effects of Permeability on the Dynamic Properties and Weathertightness of Double Skin Curtain Walls
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渗透率对双层幕墙动力性能和风雨密性的影响

DOI:
10.1061/9780784484180.038
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发表时间:
2022
期刊:
Structures Congress 2022
影响因子:
--
通讯作者:
Lori, Guido
Lori, Guido
中科院分区:
--
文献类型:
--
作者:
Alawode, Kehinde J.;Vutukuru, Krishna Sai;Elawady, Amal;Jae Lee, Seung;Gan Chowdhury, Arindam;Lori, Guido

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空腔渗透率影响双层幕墙的两个玻璃墙之间的压力平衡和荷载分担率。还已知其影响这些非结构系统中的耐候性。然而,在测试幕墙系统的防风雨性时,制造商和监管机构通常使用不复制真实的风事件或同时发生的风雨事件的测试序列,这些事件是导致双层表皮系统的空腔内的水渗透和雾形成的一些因素。对一种新型封闭式中空双层玻璃幕墙单元进行了全尺寸风荷载试验研究,风速分别为22.4 m/s、31.3 m/s和40.2 m/s,风向在0° ~ 360°之间变化,风速增量为15°。这项研究发现,渗透率和负载分配,水渗透,和动态性能之间的强烈依赖性。它还显示了当前规范指导在预测较高渗透率下的负荷分配方面的局限性。
Cavity permeability influences the rate of pressure equalization and load sharing between the two glazed walls of a double skin curtain wall. It is also known to affect weathertightness in these non-structural systems. However, in testing the weathertightness of curtain wall systems, manufacturers and regulators usually use testing sequences that do not replicate realistic wind events or co-occurring wind and rain events, which are some of the factors leading to water penetration and mist formation within the cavity of double skin systems. A full-scale wind testing study was carried out on a novel closed cavity double skin glazed curtain wall unit at 22.4 m/s, 31.3 m/s, and 40.2 m/s wind speeds with wind directions varying between 0° and 360° in 15° increments. This study finds the strong dependence between permeability and load sharing, water penetration, and dynamic properties. It also shows the limit of current code guidance in predicting load sharing at higher permeability.
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