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Adhesive Applied Roofing System Resistance Evaluation and its Quantification.

机译:胶粘剂应用屋面系统的阻力评估和量化。

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摘要

Adhesive Applied Roofing System (AARS) is a new generation of built-up roof, gaining popularity in the North American low-slope roofing market. All components of AARS are integrated using adhesives. Wind flow creates suction over a low-slope roof, which exerts uplift forces on the roof system. The components of AARS are subjected to the combined action of tensile and shearing forces due to the dynamic wind uplift action. As part of a research project, to quantify the wind performance of AARS, three different test methods, namely, pullout (to simulate the tensile force), peel (to simulate the shear force), and wind uplift tests were developed by Current (2009), Wu (2008) and Murty (2010), respectively. Three test methods have been submitted to standard development organizations for industrial applications.;To help the industrial partners, a portable tester was designed such that it can be used for pullout and peel tests in the field. The design specifications of the portable tester were extracted from the requirements of the pullout and peel test methods based on the laboratory tests. The tester was manufactured by SAI Design Inc. First, the functionality of the portable tester was verified by testing the resistance of roofing fasteners. To further validate the portable tester, more than two hundred AARS specimens of different configurations were constructed and tested by using both the portable tester and Instron machine. The test results and observed failure modes were compared. The data confirmed that the portable tester is a useful and valid equipment in performing both the pullout and peel tests. The device can be used in the field for the evaluation of system response under wind action. Thus it will be useful in quantifying the impact of environmental conditions on the AARS specimens and to examine the effects of component substitutions.;The present study proposes a correlation among these three different test methods, namely, "Higher resistance in both peel and pullout tests will result in the same or higher wind uplift resistance". The present proposal is being verified through experimental study. For four different scenarios, two set of samples were constructed by varying only one component between the samples. For each sample, more than eight specimens were tested in all three test methods. Data from peel, pullout and wind uplift test methods were compared and it successfully verified the present hypothesis. It is concluded that the test results obtained from the small-scale pullout and peel experiments can be used to predict the effectiveness of full-scale system behaviour. This finding is very useful to assess the wind uplift performance of AARS that are already in service. It is also applicable to the situation where the component substitution for AARS is needed at the construction site.
机译:胶粘剂应用屋面系统(AARS)是新一代的组合式屋面,在北美低坡度屋面市场中广受欢迎。 AARS的所有组件都使用粘合剂进行集成。风流在低坡度屋顶上产生吸力,从而在屋顶系统上施加升力。 AARS的组件由于动态风升作用而承受拉伸力和剪切力的共同作用。作为一项研究项目的一部分,为量化ARS的风能,Current(2009)开发了三种不同的测试方法,即拉出(模拟拉伸力),剥离(模拟剪切力)和风力提升测试。 ),吴(2008)和穆蒂(2010)。三种测试方法已提交给用于工业应用的标准开发组织。为了帮助工业合作伙伴,便携式测试仪的设计使其可以在现场进行拉拔和剥离测试。便携式测试仪的设计规格是根据实验室测试从拔出和剥离测试方法的要求中提取的。该测试仪由SAI Design Inc.制造。首先,通过测试屋顶紧固件的电阻来验证便携式测试仪的功能。为了进一步验证便携式测试仪,通过使用便携式测试仪和Instron机器,构造并测试了200多个不同配置的AARS标本。比较了测试结果和观察到的故障模式。数据证实,便携式测试仪是进行拉出和剥离测试的有用且有效的设备。该设备可在现场用于评估风作用下的系统响应。因此,这将有助于量化环境条件对AARS标本的影响,并检查组件替代的影响。;本研究提出了这三种不同测试方法之间的相关性,即“剥离和拉拔测试中的较高抵抗力”将导致相同或更高的抗风隆性”。本提案正在通过实验研究进行验证。对于四个不同的场景,通过仅改变样本之间的一个分量来构造两组样本。对于每种样品,在所有三种测试方法中均测试了八个以上的样品。比较了剥离,拔出和风起升试验方法的数据,并成功验证了当前的假设。结论是,从小规模拉拔和剥离实验获得的测试结果可用于预测全规模系统行为的有效性。该发现对于评估已经投入使用的AARS的风阻提升性能非常有用。它也适用于在施工现场需要用ARS替代部件的情况。

著录项

  • 作者

    Li, Weihong.;

  • 作者单位

    University of Ottawa (Canada).;

  • 授予单位 University of Ottawa (Canada).;
  • 学科 Engineering Civil.
  • 学位 M.A.Sc.
  • 年度 2010
  • 页码 202 p.
  • 总页数 202
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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