Fire resistance of concrete structures containing advanced materials

北美的基础设施正在崩溃。媒体对大火、结构不安全的建筑和坍塌的桥梁的报道变得越来越频繁。许多混凝土结构迫切需要修复或修复，但当前的经济危机要求我们开发创新的材料和具有成本效益的修复技术。不幸的是，关于这些修复结构在火灾中的性能，特别是在使用新材料进行修复的情况下，信息不足和不充分。对于建筑物或停车场，防火是保护公共安全的一个至关重要的问题，世界贸易中心灾难等悲惨事件以及西班牙和荷兰因火灾而发生的戏剧性建筑倒塌就是明证。因此，拟议研究的总体目标是了解修复混凝土结构在火灾中的行为。这项研究的最终目的将是评估火灾对建筑物整体的影响，而不是个别部分的行为。 需要回答的关键研究问题是：先进材料在高温下的性质是什么？这些特性如何影响现实火灾条件下的整体行为？该项目将培养5名博士生，3名硕士研究生。学生和4名本科生。 拟议的研究将对结构修复和火灾研究界的知识做出重大贡献。人们对火灾如何影响修复后的混凝土构件知之甚少，尤其是使用先进材料时。拟议的研究将解决这一重要的知识差距。此外，这项研究将考虑实际火灾和整体建筑行为，这些都是火灾中结构研究的前沿。工程师、建筑师和承包商将能够建造符合消防安全要求的更高效、更经济的维修。高素质的人员将接受专门培训，以设计符合现代消防要求的结构。通过这项研究，加拿大公民将受益于能够在保护公共安全的同时经济高效地修复和建造的建筑物。

North American infrastructure is crumbling. Media reports of dramatic fires, structurally unsafe buildings and failed bridges are becoming more frequent. Many concrete structures are in urgent need of repair or rehabilitation, yet the current economic crisis demands that we develop innovative materials and cost-effective techniques for repair. Unfortunately, there is insufficient and inadequate information regarding the performance of these repaired structures in fire; especially when new materials are used for repair. For buildings or parking garages, fire resistance is a vital concern to protect public safety as evidenced by tragic events such as the World Trade Center disaster, and dramatic building collapses due to fire in Spain and the Netherlands. Thus, the overall aim of the proposed research is to obtain an understanding of the behaviour of rehabilitated concrete structures in fire. The research will ultimately aim to evaluate how fire impacts buildings as a whole, rather than the behaviour of individual parts. The key research questions to be answered are: What are the properties of advanced materials at high temperature? How do these properties affect overall behaviour in realistic fire conditions? This project will train 5 Ph.D. students, 3 M.Sc. students, and 4 undergraduates. The proposed research will make a significant contribution to knowledge in both the structural rehabilitation and fire research communities. Little is known about how fire affects repaired concrete members, especially with advanced materials. The proposed research will address that important knowledge gap. Furthermore, the research will consider real fires and overall building behaviour that are at the leading edge of research into structures in fire. Engineers, architects, and contractors will be able to construct more efficient and economical repairs that meet fire safety requirements. Highly qualified personnel will be specifically trained to design structures meeting modern fire protection requirements. Through this research, Canadian citizens will benefit from buildings that can be repaired and constructed cost effectively while protecting public safety.