高层建筑外立面U型结构火蔓延特性数值模拟研究  

Numerical simulation on the fire spread in high-rise buildings with U-shaped outside-facade structure

作　　者：李建涛[1] 闫维纲[2] 朱红亚[2] 王青松[2] 孙金华[2] 

机构地区：[1]天津市消防总队重点保卫处,天津300090 [2]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026

出　　处：《火灾科学》2012年第4期174-180,共7页Fire Safety Science

基　　金：国家重点基础研究"973"计划(No.2012CB719702)资助

摘　　要：对高层建筑外立面U型结构竖直火蔓延特性影响进行了数值模拟研究,给出了火蔓延速度、热释放速率、火蔓延温度特性等参数。研究发现U型结构竖直火蔓延是一个加速燃烧的过程,当U型结构的结构因子α在0.4和1.6之间时,其火蔓延速度随着α的增加而增加,这是由于在燃烧过程中U型结构会产生烟囱效应,其强度随着U型结构结构因子的增大而增大,烟囱效应的增强加速了火蔓延过程。In this paper, the fire spread in high-rise buildings with U-shaped outside-facade structure is simulated. The fire spread rate, heat release rate and flame temperature are presented. The results show that the U-shaped structure vertical fire spread of insulation material involves an acceleration process. The fire spread rate increases with the increasing structure factors of U-shaped structure, which is caused by the fact that the U-shaped structure induces the chimney effect in the burning process. Is is also found that the strength of the chimney effect increases with the increase of the structure factor.

关 键 词：高层建筑 外立面U型结构 火蔓延 数值模拟 

分 类 号：TU551[建筑科学—建筑技术科学] X932[环境科学与工程—安全科学]