|
| 高层建筑不同结构外立面对火蔓延的影响研究 |
| Study on the Influence to Fire Spreading in Different Structural Facades of High-rise Buildings |
| 投稿时间：2024-08-22 修订日期：2024-12-16 |
| DOI： |
| 中文关键词: 结构因子 防火隔离带 防火挑檐 蔓延速率 火场温度 |
| 英文关键词: structural factor fire-barrier belt fire canopy spreading rate fire scene temperature |
| 基金项目:安徽省教育厅科学研究项目（KJ2021JD21）；安徽省住房城乡建设科学技术计划项目（2022-YF010） |
|
| 摘要点击次数: 135 |
| 全文下载次数: 0 |
| 中文摘要: |
| 为研究高层建筑不同结构外立面对外墙保温材料火蔓延的影响，以建筑外墙电动车火灾事故为场景，应用FDS软件建立火灾模型，模拟计算不同结构因子、防火隔离带及防火挑檐等对外墙保温材料挤塑聚苯板（XPS）火灾的火焰前锋蔓延速率与火场温度的影响。结果表明：不同结构因子（λ）时，外立面火焰前锋平均蔓延速率与火场稳定燃烧温度从大到小依次为：凹形平面（λ>0）、凸形平面（λ<0）、矩形平面（λ=0），当结构因子λ=0.5时，火焰前锋蔓延速率最大；0.3m～1.2m高度的防火隔离带均不能阻止火焰向上蔓延，防火隔离带高度的增加，可以降低火焰前锋蔓延速率和火场稳定燃烧温度；出挑宽度为0.3m～1.0m的防火挑檐均能阻挡火源功率为1MW的火焰向上蔓延，防火挑檐的防火性能高于防火隔离带；结果可为建筑结构外立面防火设计提供参考。 |
| 英文摘要: |
| In order to study on the influence to fire spreading of external wall insulation materials in different structural facades of high-rise buildings, a fire model was established by FDS software based on the scenario of electric vehicle fire accident on the building external wall, the effects of different factors, fire-barrier belt, and fire canopy on the flame front spreading rate and fire temperature of extruded polystyrene (XPS) fire for external wall insulation materials were simulated and calculated. The results show that the average spread rate of the flame front and the stable combustion temperature of the fire scene on the facades from high to low: concave plane (λ>0)>convex plane (λ<0)>rectangular plane (λ=0) When the structural factor (λ) is different, the spread rate of the flame front of λ=0.5 is the highest; Fire-barriers belt with the height of 0.3m to 1.2m cannot prevent flames from spreading upwards, Increasing the height of the fire-barriers belt can reduce the spread rate of the flame front and the stable combustion temperature in the fire scene; Fire canopy with the protruding width of 0.3m to 1.0m can prevent flames with the power of 1MW from spreading upwards, and the fire performance of fire canopy is higher than that of fire-barriers belt; The results can provide reference for the fire protection design of building structural facades. |
|
View Fulltext
查看/发表评论 下载PDF阅读器 |
| 关闭 |
