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.

在建筑中，使用工程木材建造高层建筑的复兴，从其美学和可持续性特征延伸。将工程木材与传统建筑材料（如钢铁和混凝土）相结合也有明显的优势。这导致了在材料的复合结合中混合的结构，这些材料有利于彼此的特定性质。研究表明，火灾中混合结构中材料之间的相互作用非常复杂。本研究的长期目标是为高层混合木结构开发可防御的基于性能的设计程序，允许建筑作为一个整体及其组成部分被理解，短期目标是：（1）评估控制工程木材在火灾和受控热暴露后在材料尺度上的潜在机制;（2）在单元和全尺寸范围内，对各种材料粘结和复合材料连接件的复合材料作用退化进行量化和建模;（3）发展火灾后修复技术，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火灾弹性实验室。结构组件将被限制现实使用一个强大的地板系统建立在几个比例。将在火灾下评估各种载荷配置，并将结果用于校准建模工具。测试方法将打破传统的耐火范式。这种方法将使和发现一个真正的理解和预测的混合木结构的结构火灾行为与基于火灾的设计方法。技术影响将包括：最佳的防火安全混合地板组件;采用先进的窄谱照明（透视火技术）的仪器开发;与建筑信息建模系统互动的简化手工设计计算技术;以及探索新材料和修复技术以恢复强度和耐久性。科学影响将包括定期更新加拿大国家建筑规范消防委员会的拟议规范制定和加拿大标准协会集团标准的扩展，为混合建筑提供指导。经济和环境影响将包括结构被动保护措施的优化。研究的一系列用户将受益（例如。该研究涵盖了建筑行业（包括建筑从业人员、生产商、保险公司、消防服务）的所有领域，直接针对加拿大建筑行业的全球联合国可持续发展目标，产生了巨大的社会影响。该研究计划将培养6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HQP将应用他们的研究成果，以满足社会的消防要求。