Holistic Fire Performance of Buildings with Sustainable Concrete and Fibre Reinforced Polymers

北美正在努力协调其摇摇欲坠的基础设施与开发更可持续和对环境负责的建筑材料的需求。混凝土行业已经采取行动，开发更可持续的产品，但关于这些产品在火灾中如何反应的信息有限或不充分。目前，制造商、工程师和政策制定者缺乏制定必要的设计法规更改的信心。作为寿命最长的建筑材料之一，混凝土仍然是许多建筑用途最合适的选择；然而，据估计，传统生产技术占全球温室气体排放量的5%之多。随着天然骨料来源的枯竭和废弃混凝土最终进入垃圾填埋场，研究人员已经开始考虑替代材料，如辅助胶凝材料(SCM)和/或再生混凝土骨料(RCA)。此外，耐久性(以及通过更耐用的结构实现的可持续性)可以通过非腐蚀性纤维增强聚合物(FRPS)等先进材料来增强。人们对这些材料(例如耐火玻璃钢和耐火混凝土)的特性的了解极其有限。需要回答的关键研究问题是：高温下可持续混凝土的特性是什么？这些特性如何影响现实火灾条件下的整体行为？使用玻璃钢和可持续混凝土的结构体系在火灾中表现如何？使用这些材料进行设计的最佳方法是什么？该项目将培养4名博士生、2名硕士研究生和4名本科生。世贸中心的报告强烈建议在实施之前对新材料的耐火性能进行测试。这项研究将使用高温材料试验和结构系统的数值模拟来开发技术和建议，以更好地为这些材料在火灾中基于性能的设计实践提供信息。尽管RCA正被用于一些应用中，但广泛使用受到限制，特别是在结构应用中，而且对SCM和RCA结合的影响知之甚少。这项研究将开发新的模型，以考虑成员如何在整体方法中作为建筑结构系统的一部分做出反应，以及他们在不受欢迎的火灾中将经历的破坏程度。在结构系统的背景下观察建筑物有助于更清楚地了解火灾中可能发生的实际情况。总体而言，这项研究将减少与FRPS相结合的可持续混凝土的耐火性能方面的技术障碍。

North America is struggling to reconcile its crumbling infrastructure with the need to develop more sustainable and environmentally responsible building materials. The concrete industry has made moves to develop more sustainable products, but there is limited or inadequate information available about how these products react in fire. Currently, manufacturers, engineers and policy makers lack the confidence to enact necessary design code changes. As one of the longest lasting building materials, concrete is still the most appropriate choice for many construction purposes; however, it is estimated that traditional production techniques account for as much as 5% of greenhouse gas emissions globally. As natural sources of aggregates deplete and waste concrete ends up in landfills, researchers have begun to consider alternative materials such as supplementary cementing materials (SCMs) and/or recycled concrete aggregates (RCA). Furthermore, durability (and sustainability through longer lasting structures) can be enhanced with advanced materials such as non-corroding fibre reinforced polymers (FRPs). There is an extremely limited understanding of the characteristics of these materials (e.g., durable FRPs and sustainable concretes) when subjected to fire.The key research questions to be answered are: What are the properties of sustainable concrete at high temperatures? How do these properties affect overall behaviour in realistic fire conditions? How do structural systems with FRP and sustainable concrete perform in fire? What are the best methods for design using these materials? This program will train 4 PhD students, 2 MSc students, and 4 undergraduates. The World Trade Center report highly recommended that new materials be tested for fire performance before implementation. This research will use high temperature material tests with numerical modelling of structural systems to develop techniques and recommendations to better inform performance based design practices of these materials in fire. Although RCA is being used in some applications, widespread use, particularly in structural applications is inhibited, and very little is known about the impact of combining SCMs and RCAs. The research will develop novel modelling to consider how members react as part of a structural system of a building in a holistic approach, and the level of damage that they will experience in an unwanted fire. Looking at buildings in the context of a system of structures helps provide a clearer understanding of what might realistically happen in a fire. Overall, this research will reduce technical barriers regarding performance in fire of sustainable concrete combined with FRPs.