Fire Resilience of Hybrid Tall Timber Structures

在高层建筑中使用工程木材的建筑业出现了复兴，这从其美学和可持续性特征上延伸了出来。将工程木材与钢铁和混凝土等传统建筑材料相结合也有明显的优势。这导致了在材料的复合联盟中混合的结构，从而使彼此的特定性能受益。研究表明，火灾中混合建筑中材料之间的复杂相互作用。这项研究的长期目标是开发高层混合木结构的可防御的基于性能的设计程序，使人们能够理解整个建筑及其部件。短期目标是：(1)评估在材料尺度上受控的热暴露和之后，控制工程木材在火灾中退化的潜在机制；(2)量化并模拟一系列材料粘结和复合材料连接件在单元和全尺度的混合组件中的复合材料作用的退化；(3)开发火灾后修复技术，用于火灾后高层混合结构的恢复；(4)为高层混合木结构建筑提供合理的设计技术和方法。将使用约克大学独特的防火实验室。使用按不同比例建造的坚固的地板系统，结构组件将得到切实的限制。各种加载配置将在火力下进行评估，结果将用于校准建模工具。测试方法将脱离传统的耐火范式。这种方法将使基于弹性的设计方法能够真正理解和预测混合木结构的结构火灾行为。技术影响将包括：最佳防火安全混合地板组件；利用先进的窄谱照明(透明火灾技术)开发仪器；与建筑信息建模系统交互的简化手工设计计算技术；以及探索新材料和维修技术，以恢复强度和耐用性。科学影响将包括定期更新加拿大国家建筑规范，以制定拟议的规范，并扩大加拿大标准协会集团的标准，为混合建筑提供指导。经济和环境影响将包括优化对结构的被动保护措施。该研究的一系列用户将受益(例如，这项研究直接针对加拿大建筑业的全球联合国可持续发展目标，产生了很高的社会影响。该研究项目将培养来自不同背景的6名(3名硕士和3名博士)高素质人才(HQP)。这些HQP将应用他们的研究成果来满足社会的消防要求。

There is a renaissance in construction that uses engineered timber for tall buildings which extends from its aesthetics and sustainability characteristics. There are also clear advantages of combining engineered timber with traditional construction materials such as steel and concrete. This has resulted in structures that are hybrid in a composite union of materials that benefit each other's specific properties. Studies have shown complex interactions between materials in hybrid construction in fire. The long-term objective of this research is to develop defensible performance-based design procedures for tall hybrid timber structures, allowing for the building as a whole and its components to be understood.  Short term objectives are to: (1) evaluate underlying mechanisms that govern engineered timber degradation in fire with and after controlled heat exposure at a material scale; (2) quantify then model the degradation of composite action in hybrid assemblies at element and full scales for a range of material bonds and composite connectors; (3) develop post-fire repair technologies for recovery of tall hybrid structures after fire; and (4) produce rational design technologies and methodologies for tall hybrid timber buildings. The unique fire resiliency lab at York University will be used. Structural assemblies will be restrained realistically using a strong floor system built at several scales. Various loading configurations will be assessed under fire and results used to calibrate modelling tools. The testing methodologies will break away from traditional fire resistance paradigms. This approach will enable and discover a true understanding and prediction of the structural fire behaviour of hybrid timber structures with a resilience-based design approach. Technological impacts will include: optimal fire safe hybrid flooring assemblies; instrumentation development with advanced Narrow Spectrum Illumination (see-through-fire technology); simplified hand-based design calculation techniques which interact with building information modelling systems; and exploration of new materials and repair techniques to restore strength and durability. Scientific impacts will include regular updates to the National Building Code of Canada Fire Protection committee for proposed code development and expansion of the Canadian Standards Association Group standards to provide guidance for hybrid construction. Economic and environmental impacts will include the optimization of passive protection measures on structures. A range of users of the research will benefit (ex. practitioners, producers, insurers, fire services), leading to a high social impact of the research directly addressing global UN sustainability goals for the Canadian construction industry. This research program will train six (3 MASc and 3 PhD) highly qualified personnel (HQP) from diverse backgrounds. These HQP will apply their research findings to meet society's fire protection requirements.