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摇摇欲坠的基础设施相关的恶化，新的防腐蚀材料正在被纳入建筑物和桥梁。这些结构可以用纤维增强聚合物（FRP）材料构造或增强，所述纤维增强聚合物（FRP）材料具有高强度重量比，易于运输并且可以在现场快速安装。 拉挤FRP型材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，外部粘结FRP片材是一种非常有效和高效的加固混凝土构件的方法。 虽然在该领域已经有了广泛的研究和成功的应用，但关于FRP结构部件在低温和严重的快速施加载荷的综合影响下的行为的出版工作很少。 该项目的目标是调查和量化的行为玻璃钢结构部件，受到冲击和爆炸载荷在低温下。 在项目的早期阶段，用FRP棒加固的混凝土夹层板、用FRP片材加固的钢筋混凝土试件和FRP拉挤型材的响应将在室温和低温下经受快速施加的冲击载荷。 在项目的后期阶段，FRP拉挤型材和FRP加固或强化混凝土的其他样本将在常温和低温下暴露于爆炸荷载。将使用炸药使试样经受自由场爆炸环境。 将研究爆炸荷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免受海啸和意外或蓄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低温特征同时适用。

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.