Fibre Reinforced Polymer (FRP) Structures Subjected to Impact and Blast Loading at Low Temperatures.

为了应对与加拿大老化和破败的基础设施相关的恶化，新的非腐蚀材料正在被加入到建筑物和桥梁中。这些结构可以用纤维增强聚合物(FRP)材料建造或加固，这种材料具有高强度与重量比，易于运输，并可以快速安装在现场。拉出的FRP截面用于建造小型轻质结构，FRP筋可用于加固混凝土。除了在新结构中使用外，外贴玻璃钢板材还是一种非常有效和高效的加固混凝土构件的方法。虽然在这一领域已经有了广泛的研究和成功的应用，但关于FRP结构构件在低温和严重、快速施加荷载的综合作用下的性能的出版工作很少。该项目的目标是调查和量化玻璃钢结构部件在低温下受到冲击和爆炸载荷的行为。在工程初期，FRP棒加固混凝土夹芯板、FRP片材加固钢筋混凝土试件和FRP拉挤型材将在室温和低温下受到快速冲击荷载的影响。在工程后期阶段，更多的玻璃钢拉制截面试件和玻璃钢加固或加固混凝土试件将在常温和低温下承受爆炸荷载。这些样品将受到使用炸药的自由场爆炸环境的影响。将研究爆炸加载材料在正常状态和冻结状态下的行为差异。这项研究的结果将特别重要，因为保护加拿大的关键基础设施不受海啸和意外或故意人为爆炸等自然极端事件的影响是一个日益重要的领域。这项研究将帮助结构工程师设计建筑物和桥梁，以安全地承受极端荷载条件的影响，这些条件可能与加拿大气候的特点低温同时应用。

In response to the deterioration associated with Canada's aging and crumbling infrastructure, new non-corroding materials are being incorporated into buildings and bridges. These structures may be constructed or reinforced with Fibre Reinforced Polymer (FRP) materials that have high strength to weight ratios, are easily transported and can be rapidly installed on site. Pultruded FRP sections are used for the construction of small lightweight structures and FRP bars may be used to reinforce concrete. In addition to their use in new structures, externally bonded FRP sheets are an extremely effective and efficient method of strengthening concrete components. While there has been extensive research and successful applications in the field, there is very little published work on the behaviour of FRP structural components when subjected to the combined effects of low temperatures and severe, rapidly-applied loads. The goal of this project is to investigate and quantify the behaviour of FRP structural components that are subjected to impact and blast loading at low temperatures. During the early stages of the project, the response of concrete sandwich panels reinforced with FRP rods, reinforced concrete specimens strengthened with FRP sheets and FRP pultruded shapes will be subjected to rapidly applied impact loads at both room and low temperatures. During later stages of the project, additional specimens of FRP pultruded sections and FRP reinforced or strengthened concrete will be exposed to blast loading at normal and low temperatures. The specimens will be subjected to a free-field blast environment using explosives. The difference in the behaviour of the blast-loaded materials in their normal and frozen states will be studied. The results of this research will be particularly significant because the protection of Canadian critical infrastructure from natural extreme events such as tsunamis and accidental or deliberate man-made explosions is an area of increasing importance. This research will help structural engineers to design buildings and bridges to safely withstand the effects of extreme loading conditions that may be applied concurrently with the low temperatures that are characteristic of the Canadian climate.