Structural Performance of Post-Tensioned Building Systems under Realistic Fire Exposure

后张拉建筑系统受到设计师的欢迎，因为它们允许长跨度。这一趋势给消防结构设计带来了新的挑战。除了这些建筑系统的复杂性之外，火灾在大空间和小房间中的表现也不同。火灾的严重程度和规模影响暴露结构的结构响应。为了以经济有效的方式确保安全，需要适用于这些建筑系统的防火设计指南。这一研究计划将研究在不同的加热情况下，通常用于大跨度（混凝土、木材）的后张拉建筑系统。这些系统在火灾中的结构性能研究有限。本研究的总体目标是了解火灾中后张拉结构的结构性能，最终目的是发现真实火灾如何影响整个后张拉建筑。考虑到在火灾中测试整个建筑物的高成本，数值模拟工具是必不可少的。需要实验数据来支持数值计算。因此，本研究项目旨在实现以下目标：(1)创建一种新型半主动反馈供暖系统，能够在明确的火灾暴露后为大跨度建筑系统供暖；(2)探索和了解这些建筑系统在各种火灾场景下的基本机制；(3)开发有效的建模技术来描述这些建筑系统对火灾的反应。本研究项目将培养7名研究生和5名本科生的高素质人才，将研究成果应用于社会的消防需求。考虑到后张拉建筑系统如何应对现实的火灾条件，一直缺乏相关活动。将获得测试设备、实验数据和对火灾诱发结构性能的新见解，以解决这一知识差距。这将有助于全球工程师、建筑师和从业者开发客观和基于性能的消防设计方法。我们的国家社区将受益，因为该计划中考虑的一些建筑系统在加拿大尚未普遍应用。这项研究将为创新建筑系统的实施提供合适的知识和建议。

Post-tensioned building systems are popular with designers as they allow long spans. This trend brings new challenges in the design of structures for fire safety. In addition to the complexity of these building systems, fires behave differently in large spaces than they do in small rooms. The severity and size of fires affects the structural response of exposed structures. To ensure safety in a cost-effective manner, fire design guidance appropriate to these building systems is required. This proposed research program will investigate post-tensioned building systems typically used for long spans (concrete, timber) under various heating scenarios. These systems have seen limited research attention for their structural performance in fire. The overarching objective of this research is to develop an understanding of the structural performance of post-tensioned structures in fire, with the ultimate aim of discovering how real fires impact whole post-tensioned buildings. Given the high cost of testing whole buildings in fire, numerical modelling tools are essential. There is a need for experimental data to support numerical efforts. This research program therefore seeks to meet the following objectives:(1) create a novel semi-active feedback heating system capable of heating long-span building systems following a well-defined fire exposure; (2) explore and understand the fundamental mechanisms of these building systems under a variety of fire scenarios; and (3) develop validated modelling technologies to describe the response of these building systems to fire. This research program will train 7 graduate and 5 undergraduate highly qualified personnel to apply the research findings to meet society’s fire protection requirements. There has been a dearth of activity considering how post-tensioned building systems respond to realistic fire conditions. Test equipment, experimental data, and novel insights into fire-induced structural performance will be obtained to address this knowledge gap. This will help global communities of engineers, architects, and practitioners develop objective and performance-based fire design methodologies. Our national community will benefit, as some building systems considered in this program have not commonly been applied in Canada. This research will develop suitable knowledge and recommendations for the implementation of innovative building systems.