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

真实火灾暴露下后张法建筑系统的结构性能

• 批准号: RGPIN-2015-05081
• 负责人: Gales, John
• 金额: $ 0.18万
• 依托单位: York University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636464
• 关键词: Structural; Performance; Post; Tensioned; Building

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.

后张法建筑系统很受设计师欢迎，因为这种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，大空间中的火灾表现与小空间中的不同。火灾的严重程度和规模会影响裸露结构的结构响应，为了以经济有效的方式确保安全，需要适合这些建筑系统的消防设计指南。对于长跨度（混凝土，这些系统在火灾中的结构性能受到的研究有限，这项研究的首要目标是了解后张结构在火灾中的结构性能。真实火灾如何影响整个后张建筑。鉴于在火灾中测试整个建筑物的成本很高，因此需要实验数据来支持数值工作。 (1) 创造一种新颖的半主动能够在明确的火灾暴露后加热大跨度建筑系统的反馈加热系统；(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) 开发经过验证的建模技术来描述该研究项目将培训 7 名研究生和 5 名本科生高素质人员，以应用研究成果来满足社会的消防要求。目前还缺乏考虑后张法建筑系统如何应对现实火灾的活动。测试设备，实验。我们将获得有关火灾引起的结构性能的新见解，以解决这一知识差距，这将有助于全球工程师、建筑师和私营部门开发目标和基于性能的火灾设计方法，因为我们的国家社区将从中受益。该计划中考虑的一些建筑系统尚未在加拿大得到普遍应用。这项研究将为实施创新建筑系统提供适当的知识和建议。