High strain rate effects on post-installed mechanical anchors

高应变率对安装后机械锚栓的影响

• 批准号: 514597-2017
• 负责人: Braimah, Abass
• 金额: $ 1.82万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=639829
• 关键词: strain; rate; effects; post; installed

The increase in global terrorism in the past several decades has resulted in the retrofit of window glass toincrease its blast resistance. Most windows in high profile buildings are often retrofitted with anti-shatter filmto mitigate injuries and fatalities due to glass shards. When the anti-shatter film is, however, anchored towindow frames, blast loading is transferred to the window frames and ultimately to the structure of the façade.Conventional windows often lack adequate strength to resist the imposed blast loading, resulting indislodgement of retrofitted windows accompanied by their projection into the interior of buildings with a highcapacity to cause injury and fatality. Post-installed anchors are recommended for upgrading anchorage ofwindow frames to the structure of the façade. However, limited information is available for design of anchorssubjected high strain rates such as blast and impact loading.The proposed project will test post-installed mechanical anchors subjected to high strain rate loading generatedin a drop-mass test frame as a first step to understanding behaviour of post-installed mechanical anchors underblast loading. The results from the tests will provide much needed information for the design of blast resistantwindow systems. Information that will also assist Federal Government departments such as Global AffairsCanada and Public Works and Government Services of Canada to design blast resistant structures in Canadaand abroad. This is particularly important for the safety and security of Canadian Embassies abroad and highprofile government buildings in Canada requiring blast protective design.

在过去的几十年里，全球恐怖主义的增加导致了窗户玻璃的改造，以增加其抗冲击性。大多数高层建筑的窗户通常都加装了防碎膜，以减轻玻璃碎片造成的伤害和死亡。然而，当抗破碎膜锚定在窗框上时，爆炸荷载被转移到窗框上，并最终转移到立面结构上。传统的窗户通常缺乏足够的强度来抵抗施加的爆炸载荷，导致改造后的窗户移位，同时它们会投射到建筑物内部，这很容易造成伤害和死亡。建议使用后安装锚来将窗框的锚固提升到立面结构。然而，对于承受高应变率（如爆炸和冲击载荷）的锚的设计，可用的信息有限。拟议的项目将测试后安装的机械锚在跌落质量测试框架中产生的高应变率加载，作为了解后安装机械锚在爆炸加载下的行为的第一步。试验结果将为抗爆窗系统的设计提供必要的信息。这些信息还将协助联邦政府部门，如加拿大全球事务部和加拿大公共工程和政府服务部，在加拿大和国外设计防爆结构。这对于需要防爆设计的加拿大驻外使馆和高知名度政府大楼的安全尤为重要。