主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2025, Vol. 44 ›› Issue (12): 1767-1776.

• • 上一篇    下一篇

生物基材板防火保护CLT承重墙体耐火性能分析

潘雁翀1,2,3, 景宝成4, 项凯1,2,3, 邱培芳1,2,3, 杨冬冬4   

  1. （1.应急管理部天津消防研究所，天津 300381； 2.工业与公共建筑火灾防控技术应急管理部重点实验室，天津 300381； 3.天津市消防安全技术重点实验室，天津 300381； 4.扬州大学 建筑科学与工程学院，江苏 扬州 225127）
  • 收稿日期:2025-03-21 修回日期:2025-04-29 出版日期:2025-12-15 发布日期:2025-12-25
  • 作者简介:潘雁翀，应急管理部天津消防研究所副研究员，硕士，主要从事组合结构及建筑防火研究，天津市南开区卫津南路110号，300381，panyanchong@tfri.com.cn。
  • 基金资助:
    国家重点研发计划项目（2023YFC3010100）；应急管理部天津消防研究所中央级公益性科研院所基本科研业务费专项资金项目（2024SJ17）

Fire-resistance analysis of load-bearing CLT walls protected by bio-based insulation board

Pan Yanchong1,2,3, Jing Baocheng4, Xiang Kai1,2,3, Qiu Peifang1,2,3, Yang Dongdong4   

  1. (1. Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China; 2. Key Laboratory of Fire Protection Technology for Industry and Public Building, Ministry of Emergency Management, Tianjin 300381, China; 3. Tianjin Key Laboratory of Fire Safety Technology, Tianjin 300381, China; 4. College of Architectural Science and Engineering, Yangzhou University, Yangzhou Jiangsu 225127, China)
  • Received:2025-03-21 Revised:2025-04-29 Online:2025-12-15 Published:2025-12-25

摘要： 生物基材板因其优异的隔热性能与环保特性，可作为正交胶合木（Cross-Laminated Timber, CLT）承重构件的防火保护层。目前，关于CLT构件耐火性能基础理论的研究尚不充分，缺少生物基材板防火保护CLT承重墙体的防火机制及效能验证。本文建立了生物基材板防火保护CLT承重墙体耐火性能顺序热力耦合有限元模型，基于验证后的模型，系统研究了防火保护厚度、导热系数、是否脱落、脱落时间及CLT层数、墙体高度、宽度、荷载比等因素对CLT承重墙体温度、变形、炭化速率、耐火极限等的影响规律。结果表明：CLT墙体耐火极限与防火保护层厚度呈正线性相关，与防火保护层导热系数及荷载比呈负线性相关，仅当生物基材板导热系数恒定时，才可满足150 min耐火极限要求。生物基材板保护墙体的炭化速率与石膏板不同，不能直接用欧洲规范EC5模型表征。本文研究可为生物基材板-CLT复合结构的性能优化与标准制定提供依据。

关键词: 正交胶合木, 承重墙体, 生物基材板, 耐火极限, 炭化速率

Abstract: Bio-based insulation boards, with excellent thermal insulation and environmental benefits, could be utilized as protective layers for cross-laminated timber (CLT) load-bearing elements. However, current research on the fire performance of CLT elements is insufficient, especially regarding the protection mechanisms and effectiveness of bio-based materials for CLT walls. This study has developed a sequential thermo-mechanical finite element model for CLT walls with bio-based protection. Based on the model, systematic investigations were carried out to evaluate the effects of fire protection thickness, thermal conductivity, peeling behavior, peeling time, number of CLT laminae, wall dimensions, load ratio, etc., on the temperature, deformation, charring rate, and fire resistance rating of CLT walls. Results show a linear relationship between CLT wall fire resistance rating and protection thickness (positive), protection thermal conductivity and load ratio (negative). A 150-min fire resistance target is achievable only when the thermal conductivity of the bio-based material remains constant. The charring rate of walls with bio-based protection differs from that of gypsum-board and cannot be assessed using the EC5 model. This research provides a foundation for optimizing bio-based fire-CLT composite structures and developing relevant standards.

Key words: cross-laminated timber, load-bearing wall, bio-based material board, fire resistance, charring rate