木结构建筑之间火灾蔓延的试验研究
Experimental study on fire spread between timber structure buildings
彭磊 1邱培芳 2欧加加3
作者信息
- 1. 天津泰达消防科技有限公司,天津 300381
- 2. 应急管理部天津消防研究所,天津 300381;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;天津市消防安全技术重点实验室,天津 300381
- 3. 中国建筑西南设计研究院有限公司,四川 成都 610042
- 折叠
摘要
搭建木结构试验框架,对影响木结构建筑之间火灾蔓延的因素开展实体火灾试验研究,分别考虑火灾荷载密度、外墙开口尺寸、外墙材料的燃烧性能、水平间距等影响因素.研究结果表明,在相同火灾荷载密度条件下,增大着火房间外墙开口面积会显著增大目标墙体上的辐射强度;在相同的开口条件下,增加室内火灾荷载密度,也会增大目标墙体上的辐射强度;当着火房间的外墙被引燃时,目标墙体受窗口辐射和被引燃外墙上火焰的双重辐射,会进一步增加火灾蔓延的风险.在测试的火灾场景中,当防火间距为6 m时,目标墙体上的辐射热流强度值小于 10 kW/m2,不会因热辐射的原因造成建筑之间的火灾蔓延.研究结果可为定量分析各因素对火灾在建筑之间蔓延的影响和合理确定防火间距提供数据支撑.
Abstract
A timber frame structure was set up to conduct fire test studies on the factors affecting the fire spread between timber structure buildings.The study considered variables such as fire load density,size of exterior wall openings,combustibility of ex-terior wall materials,and horizontal spacing between two build-ings.The results indicate that increasing the opening area of the external wall would significantly enhance the radiative heat flux on the target wall under identical fire load densities.Similarly,in-creasing the fire load density in the burning room would also am-plify the radiative heat flux on the target wall under consistent opening conditions.Once ignition occurred in the exterior wall of the burning room,the target wall would be exposed to the com-bined radiation from the room opening and the external flame in the exterior wall,and this would potentially escalate fire spread-ing risks for the target wall.In the tested fire scenarios with a 6 m fire spacing,the radiative heat flux values on the target wall re-main below 10 kW/m2,which did not pose a risk for fire spread between buildings due to radiation.These research results provide supportive data for quantitatively analyzing various factors' influ-ence on building-to-building fire spread and aid in determining ap-propriate fire spacing between builds.
关键词
木结构建筑/火灾蔓延/辐射强度/防火间距/开口尺寸/火灾荷载密度Key words
timber structure building/fire spread/radiation inten-sity/fire spacing/opening size/fire load density引用本文复制引用
基金项目
国家重点研发计划(2017YFC0703503)
出版年
2024
NETL
NSTL
万方数据