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 ›› 2023, Vol. 42 ›› Issue (5): 652-657.

• • 上一篇    下一篇

云南传统民居建筑木质横梁耐火性能分析

张扬1, 张健2, 左林阳2   

  1. (1. 云南省消防救援总队,云南 昆明 650200;2. 昆明理工大学 建筑工程学院,云南 昆明 650500)
  • 出版日期:2023-05-15 发布日期:2023-05-15
  • 作者简介:张 扬(1981- ),男,河南许昌人,云南省消防救援总队高级工程师,主要从事消防监督及科技管理工作,云南省昆明市海塘路666号,650200。

Fire resistance analysis of wooden beams in traditional residential buildings in Yunnan Province

Zhang Yang1, Zhang Jian2, Zuo Linyang2   

  1. (1. Yunnan Fire and Rescue Brigade,Yunnan Kunming 650200, China;2. Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Yunnan Kunming 650500, China)
  • Online:2023-05-15 Published:2023-05-15

摘要: 木结构建筑火灾过程中,其木质构件的力学性能及有效承载截面逐渐减小,易导致建筑发生局部或整体倒塌,影响消防救援。为研究火灾下木结构建筑主要承重构件的安全性问题,以云南典型穿斗式及杆栏式民居建筑横梁为研究对象,通过ABAQUS建立其三面受火模型,采用热-应力耦合进行模拟分析其温度场和力学性能变化,获得不同受火时间下的极限荷载。结果表明:木质横梁在火灾作用下,其所能承受的极限荷载下降速度较快,穿斗式民居建筑横梁在火灾中的耐火极限为26 min;杆栏式建筑横梁在火灾中的耐火极限为17 min。

关键词: 木结构, 木质构件, 火灾安全性, 热-应力耦合, 力学性能

Abstract: The mechanical properties and effective bearing cross-section of wood members of wood structure buildings are gradually reduced during fire, which may lead to local or overall collapse of the building and affect the fire fighting and rescue operations. In order to study the safety of the main load-bearing members of wood-frame buildings under fire, this paper takes the crossbeams of typical Chuandou and railing style residential buildings in Yunnan Province as the research object, establishes its three-sided fire model through ABAQUS, uses thermal-stress coupling to simulate and analyze the changes of its temperature field and mechanical properties, and obtains the ultimate loads under different fire exposure time. The results show that the ultimate load that a wooden beam can withstand under the action of fire is rapidly reduced, the fire resistance limit of load-bearing beams in fire for Chuandou residential buildings is 26 min; the fire resistance limit of load-bearing beams in fire for railing style buildings is 17 min.

Key words: wooden structures, wood components, fire safety, thermal-stress coupling, mechanical properties