基于区域模型的单层高大空间建筑钢构件温升计算

The calculation of steel temperature rise in the large-space building based on the regional model

基于火灾双区域模型,研究高大空间建筑钢构件的理论温升,并以某会展中心小功率火灾为例,运用数学软件MATLAB编程计算钢构件温升。计算结果表明,火灾情况下,空间建筑高度对屋顶钢构件的稳定性有一定影响,建筑高度越高,钢构件稳定性越好。对于单层建筑高度大于10 m的高大空间建筑,小功率火灾(4 MW为例),建筑钢构件在3 600 s内升温不超过100℃,钢构件能够满足建筑稳定性和消防队灭火的基本要求。

Based on the two-zone model of fire,the theoretical rise of steel temperature in large space building was researched.Taking a small power fire in exhibition centre as an example,the temperature rise was computed using MATLAB.The result showed that the height of large space building can influence the steel temperature rise during the fire accident,and the higher the building is,the steadier the steel members are.If the fire power is small（4 MW as an example）,in 3600 s,the temperature rise of steel members is less than 100 ℃ in large-space building whose height exceeds 10 m.And the stability of steel structure can meet the requirement of fire fighting.