带连廊高层建筑外墙火竖向蔓延数值模拟研究  

Numerical Simulation on Vertical Spread of Exterior Wall Fire in High-rise Building with Corridor

作　　者：王宇[1] 周盈彤 曲志鹏 WANG Yu;ZHOU Yingtong;QU Zhipeng(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2020年第6期1020-1026,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(11676190);辽宁省自然科学基金项目(2019-ZD-0299);沈阳市科技计划项目(19-109-4-19)。

摘　　要：目的探究火灾过程中带连廊高层建筑不同状态下外立面着火情况,揭示竖向连续多窗口羽流火焰与外保温材料的融合蔓延规律.方法利用火灾动态仿真模拟软件PyroSim建立18层足尺寸带连廊高层住宅楼火灾模型,改变连廊到外立面距离和竖向窗口数量,结合火灾蔓延时窗口竖向温度曲线及温度分布等温线,分析火灾发展过程中羽流火焰融合高度,引入危险温度T,研究带连廊高层建筑在火灾场景下的火焰融合规律.结果达到危险温度T时,连廊距外立面1.5 m、2 m、2.5 m条件下竖向三窗口比竖向两窗口火焰融合高度提高10.40%、13.91%、27.62%,竖向三窗口与竖向四窗口火焰融合高度基本相同.竖向两窗口条件下,连廊距外立面1.5 m、2 m、2.5 m时火焰融合高度分别降低8%、8.70%,竖向三窗口、竖向四窗口在连廊距外立面1.5 m、2 m、2.5 m时火焰融合高度基本相同.结论连廊对高层建筑外立面火焰蔓延的趋势有影响作用,建议将连廊距外立面1.5m、竖向三窗口火焰融合高度作为带连廊高层建筑外部阻隔区设置高度.The purpose of this paper is to explore the fire of the facade of high-rise building with corridor under different conditions in the process of fire,and reveals the law of the fusion and spread of vertical continuous multi window plume flame and external insulation material.The fire model of 18 story high-rise residential building with corridor is established by using Pyrosim software.By changing the distance between corridor and facade and the number of vertical windows,the vertical temperature distribution and the vertical temperature distribution isotherm are obtained by combining the fire spread.The temperature and height of plume flame fusion in the process of fire development are analyzed in this paper,the concept of dangerous temperature T is introduced to study the flame fusion law of high-rise building with corridor in the fire scene.When the dangerous temperature T is reached,the vertical three-window flame height is increased by 10.40%,13.91%,27.62%than the vertical two-window under the conditions of 1.5 m,2 m,and 2.5 m from the external facade.The flame fusion height of vertical three-window and vertical four-window is basically the same.Under the condition of two vertical windows,the flame fusion height is reduced by 8%and 8.70%when the corridor is 1.5 m,2m and 2.5 m away from the facade.The flame fusion height of vertical three-window and vertical four-window is essentially the same at 1.5 m,2 m,2.5 m from the facade.The results show that the corridor has an effect on the flame spreading tread of the high-rise building facade.The height of the external barrier area of high-rise building with corridor should be set in vertical three-window and connecting corridor 1.5 m away from the facade.

关 键 词：带连廊高层建筑 阻隔区设置 窗口喷火 火焰融合 

分 类 号：TU54[建筑科学—建筑技术科学]