| 李建涛,闫维纲,朱红亚,王青松,孙金华.高层建筑外立面U型结构火蔓延的实验研究[J].火灾科学,2012,21(4):167-173. |
| 高层建筑外立面U型结构火蔓延的实验研究 |
| Experimental study on the fire spread in high-rise buildings with U-shaped outside-facade structure |
| 投稿时间：2012-09-08 修订日期：2012-10-03 |
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| DOI：10.3969/j.issn.1004-5309.年.期.顺序 |
| 基金项目:国家重点基础研究“973”计划（No. 2012CB719702）的资助 |
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| 中文关键词: 高层建筑 外立面U型结构 火蔓延 结构因子 |
| 英文关键词:high-rise building U-shaped facade structure fire spread structure factor |
| 摘要点击次数: 705 |
| 全文下载次数: 526 |
| 中文摘要: |
| 针对高层建筑中常见的U型外立面结构，对典型有机保温材料硬质聚氨酯泡沫（PU）进行了小尺度条件下的U型结构竖直火蔓延实验研究，分析了其区别于高层建筑普通结构的竖直火蔓延特性。实验结果表明，U型结构竖直方向火蔓延是一个非稳态的火蔓延过程，其火蔓延速度会随着时间的推进逐渐加速。在燃烧过程中U型结构会产生烟囱效应，促进火蔓延的发展，其强度随着U型结构因子的增大而增大，当结构因子大于1.2时，火蔓延加速过程趋于稳定。 |
| 英文摘要: |
| In this paper, the vertical fire spread experiments over small scale U-shaped structure with the typical organic thermal insulation material PU (polyurethane foam) were conducted. The vertical fire spread of the U-shaped structure and that of common structure were compared. The experimental results showed that the U-shaped structure vertical fire spread involves an acceleration process. The U-shaped structure of the high-rise building induces a chimney-like effect in the burning process which causes the acceleration of fire spread. The strength of the chimney-like effect increases when the structure factor is higher than 1.2. |
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