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。混凝土行业已采取措施开发更可持续的产品，但有关这些产品在火灾中如何反应的信息有限或不足。目前，制造商、工程师和政策制定者缺乏制定必要的设计规范变更的信心。混凝土作为使用寿命最长的建筑材料之一，仍然是许多建筑用途的最佳选择;然而，据估计，传统生产技术占全球温室气体排放量的5%。随着骨料的自然来源枯竭，废弃混凝土最终被填埋，研究人员已经开始考虑替代材料，如补充胶凝材料（SCM）和/或再生混凝土骨料（RCA）。此外，耐用性（和通过更持久的结构的可持续性）可以通过先进的材料来增强，例如非腐蚀性纤维增强聚合物（FRP）。对这些材料的特性的理解极其有限（例如，耐久FRP和可持续混凝土）。*需要回答的关键研究问题是：高温下可持续混凝土的性能是什么？这些属性如何影响实际火灾条件下的整体行为？FRP和可持续混凝土的结构系统在火灾中如何表现？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名硕士生和4名本科生。*世界贸易中心的报告强烈建议，新材料在实施前要进行防火性能测试。这项研究将使用高温材料测试与结构系统的数值建模，以开发技术和建议，以更好地为这些材料在火灾中的性能设计实践提供信息。尽管RCA在某些应用中得到了应用，但它的广泛使用，特别是在结构应用中，受到了抑制，并且对SCM和RCA组合的影响知之甚少。该研究将开发新的建模，以考虑构件如何以整体方法作为建筑物结构系统的一部分作出反应，以及它们在不必要的火灾中将遭受的损坏程度。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。总的来说，这项研究将减少与FRP相结合的可持续混凝土在火灾中性能的技术障碍。

******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.************