High strain rate effects on post-installed mechanical anchors

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，以增加其抗爆炸性。大多数高层建筑的窗户通常都装有防碎膜，以减轻玻璃碎片造成的伤害和死亡。然而，当防破碎膜固定在窗框上时，爆炸荷载会传递到窗框上，并最终传递到外立面的结构上。传统的窗户通常缺乏足够的强度来抵抗施加的爆炸荷载，导致经过改造的窗户移位，并突出到建筑物的内部，从而造成伤害和死亡。建议使用后安装锚固件，以将窗框锚固到立面结构上。然而，有限的信息是可用于高应变率，如爆炸和冲击加载的锚设计。拟议项目将测试后安装的机械锚受到高应变率加载产生在一个drop-mass测试框架作为第一步，以了解行为后安装的机械锚爆炸荷载。试验结果将为防爆窗系统的设计提供所需的信息。这些信息也将有助于联邦政府部门，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。这对于加拿大驻外使馆和加拿大政府高层建筑的安全和安保尤为重要，这些建筑需要防爆设计。

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.