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装，以提高其抗爆性。在高调建筑中，大多数窗户通常都会改装防碎薄膜，以减少玻璃碎片造成的伤亡。然而，当防碎膜固定在窗框上时，爆炸荷载被转移到窗框并最终传递到外墙结构。传统的窗户往往缺乏足够的强度来抵抗施加的爆炸荷载，导致加装窗户移位，同时它们突出到建筑物的内部，造成人员伤亡。对于将窗框的锚固升级为立面结构，建议采用后安装锚杆。然而，对于承受高应变率的锚的设计，如爆炸和冲击载荷，可获得的信息有限。拟议的项目将测试安装后的机械锚在下落质量测试框架中产生的高应变率载荷，作为了解后安装的机械锚在爆炸载荷下的行为的第一步。试验结果将为抗爆双窗系统的设计提供急需的信息。这些信息还将帮助加拿大联邦政府部门，如加拿大全球事务部、加拿大公共工程和政府服务部，在加拿大和国外设计防爆炸结构。这对于加拿大驻外大使馆和加拿大境内需要防爆设计的高调政府大楼的安全和安保尤为重要。

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.