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

后张法建筑系统因其允许长跨度而受到设计师的欢迎。这一趋势给消防安全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，火灾在大空间中的表现与在小房间中的表现不同。火灾的严重程度和规模会影响暴露结构的结构响应。为了以具有成本效益的方式确保安全，需要适用于这些建筑系统的消防设计指南。这项拟议的研究计划将调查后张建筑系统通常用于长跨度（混凝土，木材）在各种加热情况下。这些系统在火灾中的结构性能受到了有限的研究关注。本研究的总体目标是了解火灾中后张结构的结构性能，最终目的是发现真实的火灾如何影响整个后张结构建筑。鉴于测试火灾中的整个建筑物的成本很高，数字建模工具是必不可少的。需要实验数据来支持数值计算工作。因此，该研究计划旨在满足以下目标：（1）创建一种新型的半主动反馈加热系统，能够在明确的火灾暴露后加热长跨度建筑系统;（2）探索和理解这些建筑系统在各种火灾场景下的基本机制;（3）开发经过验证的建模技术来描述这些建筑系统对火灾的响应。本研究计划将培养7名研究生和5名本科生高素质人才，以应用研究成果，以满足社会的消防需求。一直缺乏活动考虑如何后张建筑系统响应现实的火灾条件。将获得测试设备、实验数据和对火灾引起的结构性能的新见解，以解决这一知识缺口。这将有助于全球工程师、建筑师和从业者社区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，因为本计划中考虑的一些建筑系统在加拿大并不常见。这项研究将为创新建筑系统的实施提供适当的知识和建议。

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.