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首页> 外文期刊>Practice periodical on structural design and construction >Effect of Fastener-Deck Strength on the Wind-Uplift Performance of Mechanically Attached Roofing Assemblies
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Effect of Fastener-Deck Strength on the Wind-Uplift Performance of Mechanically Attached Roofing Assemblies

机译：紧固件-甲板强度对机械连接的屋面组件的抗风性能的影响

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摘要

A roofing system consists of a waterproof membrane, attachments, cover board (if present), insulation, and vapor or air barrier [retarder (if present)]. A roof assembly is a roof system that includes the structural deck. Wind-uplift ratings are reported by subjecting roof assembly mockups to wind dynamics. Most of the time, technical reports clearly document the properties of membranes and attachment systems (fasteners, plates, and seams) and only briefly mention the strength of the fastener-deck interface. Research by a North American roofing consortium established at the National Research Council of Canada, the Special Interest Group for Dynamic Evaluation of Roofing Systems, has demonstrated the significant influence of fastener-deck parameters on the wind-uplift resistance of mechanically attached roofs. This paper presents data and information from this ongoing investigation. Seven different roofing assemblies using three widely used roofing membranes with different fastener-deck combinations were constructed and tested under dynamic wind conditions. Assembly responses were measured based on two design factors: pressure and force. The present study identified three parameters characterizing the fastener-deck interface strength: deck grade, deck gauge, and fastener type. The study found that assemblies tested with steel decks having thicker gauge or higher yield strength tend to have greater fastener-deck strength and therefore they sustain higher wind-uplift pressures compared to assemblies with thinner gauge or lower yield-strength decks. Similarly, assemblies where the membrane attachment is made with fasteners with larger shank diameters sustained higher wind-uplift pressures compared to assemblies installed with smaller shank diameter fasteners. This study also found that fastener pullout resistance could be used as a verification factor for estimating assembly wind resistance.
机译：屋面系统由防水膜，附件，盖板（如果有），隔热材料和防潮层或防潮层（延迟器（如果有））组成。屋顶组件是包括结构甲板的屋顶系统。通过使屋顶组件模型受到风动力的作用来报告风提升等级。大多数时候，技术报告清楚地记录了膜和附件系统（紧固件，板和接缝）的特性，仅简要提及了紧固件-甲板界面的强度。由加拿大国家研究委员会（屋顶系统动态评估特别兴趣小组）成立的北美屋顶联盟进行的研究表明，扣件-甲板参数对机械连接屋顶的抗风扬性具有重大影响。本文介绍了这项正在进行的调查的数据和信息。构造了七个不同的屋面组件，它们使用了三种广泛使用的屋面膜以及不同的紧固件-甲板组合，并在动态风条件下进行了测试。装配响应是根据两个设计因素测量的：压力和力。本研究确定了表征扣件-甲板界面强度的三个参数：甲板等级，甲板规格和扣件类型。研究发现，使用钢轨厚度更大或屈服强度更高的组件进行测试的组件往往具有更高的紧固件甲板强度，因此与使用钢轨厚度更薄或屈服强度较低的组件相比，它们承受更高的风扬压​​力。类似地，与安装有较小柄直径紧固件的组件相比，使用较大柄直径的紧固件制造膜附件的组件承受更高的风扬压​​力。这项研究还发现，紧固件的抗拔性可以用作估算组件抗风性的验证因素。

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