期刊
FIRE SAFETY JOURNAL
卷 128, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.firesaf.2022.103523
关键词
Performance-based design; Compartment fires; Heat transfer; Protection of wood; Large-scale; Cross-laminated timber; Mass timber
资金
- ARC Future Timber Hub [IH150100030]
- QFES
- XLam
- Hyne Timber
- Lend Lease
- Knauf
- Rockwool International A/S
- National Centre for Timber Durability and Design Life
- Australian Research Council [IH150100030] Funding Source: Australian Research Council
Fire safety is a major challenge for engineered timber buildings due to their combustible nature. This paper presents a literature review and the design of a large-scale testing methodology to establish the fundamental principles for the self-extinction of engineered timber. Research at material and compartment scales has quantified self-extinction and demonstrated the complex phenomena involved, providing insights for the design framework.
Fire safety remains a major challenge for engineered timber buildings. Their combustible nature challenges the design principles of compartmentation and structural integrity beyond burnout, which are inherent to the fire resistance framework. Therefore, self-extinction is critical for the fire-safe design of timber buildings. This paper is the first of a three-part series that seeks to establish the fundamental principles underpinning a design framework for self-extinction of engineered timber. The paper comprises: a literature review introducing the body of work developed at material and compartment scales; and the design of a large-scale testing methodology which isolates the fundamental phenomena to enable the development and validation of the required design framework. Research at the material scale has consolidated engineering principles to quantify self-extinction using external heat flux as a surrogate of the critical mass loss rate, and mass transfer or Damko spacing diaeresis hler numbers. At the compartment scale, further interdependent, complex phenomena influencing self-extinction occurrence have been demonstrated. Time-dependent phenomena include encapsulation failure, fall-off of charred lamellae and the burning of the movable fuel load, while thermal feedback is time-independent. The design of the testing methodology is described in reference to these fundamental phenomena.
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