Fire Resilience of Hybrid Tall Timber Structures

混合高层木结构的耐火能力

• 批准号: RGPIN-2022-05335
• 负责人: Gales, John
• 金额: $ 3.79万
• 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: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=758056
• 关键词: Fire; Resilience; Hybrid; Tall; Timber

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.

在高层建筑中使用工程木材的建筑业正在复兴，这源于其美学和可持续性特征。将工程木材与钢材和混凝土等传统建筑材料相结合也具有明显的优势。这导致了混合材料复合材料的结构，这些材料有利于彼此的特定性能。研究表明，混合结构火灾中材料之间存在复杂的相互作用。这项研究的长期目标是为高层混合木结构开发基于性能的防御性设计程序，使建筑物作为一个整体及其组成部分能够被理解。  短期目标是：（1）评估在材料规模受控热暴露下和之后控制工程木材在火灾中降解的基本机制； (2) 对一系列材料结合和复合连接器的混合组件中复合材料作用的退化进行量化和建模，在单元和全尺度上进行； (3) 开发高层混合结构火灾后恢复的火灾后修复技术； (4) 提出合理的高层混合木结构建筑设计技术和方法。将使用约克大学独特的防火实验室。结构组件将使用按多种比例建造的坚固地板系统进行实际约束。将在火力下评估各种负载配置，并将结果用于校准建模工具。测试方法将脱离传统的耐火范式。这种方法将能够通过基于弹性的设计方法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： 最佳的防火混合地板组件；采用先进的窄光谱照明（透视技术）的仪器开发；与建筑信息建模系统交互的简化的基于手工的设计计算技术；探索新材料和修复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消防委员会国家建筑规范，以制定拟议的规范，并扩展加拿大标准协会团体标准，为混合建筑提供指导。经济和环境影响将包括优化结构的被动保护措施。该研究的一系列用户将受益（例如从业者、生产商、保险公司、消防部门），从而使该研究产生巨大的社会影响，直接解决加拿大建筑业的全球联合国可持续发展目标。该研究项目将培训六名（3名硕士和3名博士）来自不同背景的高素质人才（HQP）。这些总部将应用他们的研究成果来满足社会的消防要求。