Fire resistance of concrete structures containing advanced materials

北美的基础设施正在崩溃。媒体对戏剧性火灾、结构不安全的建筑物和倒塌的桥梁的报道越来越频繁。许多混凝土结构迫切需要维修或修复，但当前的经济危机要求我们开发创新材料和具有成本效益的维修技术。不幸的是，有足够的和不充分的信息，这些修复结构在火灾中的性能，特别是当新材料用于修复。对于建筑物或停车场来说，耐火性是保护公共安全的重要因素，例如世界贸易中心灾难以及西班牙和荷兰因火灾导致的戏剧性建筑物倒塌等悲剧事件就是明证。因此，拟议的研究的总体目标是获得火灾中恢复混凝土结构的行为的理解。该研究的最终目标是评估火灾如何影响整个建筑物，而不是单个部分的行为。 需要回答的关键研究问题是：先进材料在高温下的性能是什么？这些属性如何影响实际火灾条件下的整体行为？本项目将培养5名博士。学生，3名硕士生和4名本科生。 拟议的研究将作出重大贡献的知识在结构修复和火灾研究界。人们对火灾如何影响修复的混凝土构件知之甚少，特别是使用先进材料的构件。拟议的研究将填补这一重要的知识空白。此外，该研究将考虑真实的火灾和整体建筑行为，这是研究火灾中结构的前沿。工程师、建筑师和承包商将能够进行更有效、更经济的维修，以满足消防安全要求。高素质的人员将接受专门培训，以设计符合现代防火要求的结构。通过这项研究，加拿大公民将受益于可以在保护公共安全的同时进行维修和建造的建筑物。

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.