考虑圆弧形壁面影响的大空间建筑火灾空气升温经验公式  

AIR TEMPERATURE EMPIRICAL FORMULA FOR LARGE SPACE STRUCTURE UNDER FIRE CONSIDERING THE EFFECT OF CIRCULAR WALL

作　　者：梁劲[1] 薛素铎[1,2] 李雄彦[1,2] 

机构地区：[1]北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100124 [2]北京工业大学工程抗震与结构诊治北京重点实验室,北京100124

出　　处：《工业建筑》2012年第7期91-94,共4页Industrial Construction

基　　金：北京市自然科学基金项目(8082004)

摘　　要：目前针对大空间建筑火灾空气升温的数值模拟基本都采用规则的矩形几何模型,然而在实际工程中,大空间建筑为满足使用功能和建筑造型等要求,几何形状经常采用曲面体或壳体。通过FDS程序模拟火灾场景,采用矩形单元拟合圆弧墙的算法,考察了圆弧形壁面对大空间建筑火灾下空气升温过程的影响;同时,基于MATLAB程序非线性拟合方法,建立了考虑圆弧形壁面影响的大空间建筑火灾空气升温经验公式。Rectangular geometric model has been used universally for the numerical simulation of air temperature in large space structure under fire. For practical structures, however, in order to meet the function and architectural modeling requirements, the geometric shapes of large space building are often with curved surfaces or shell. In this paper, computer simulation was performed by FDS program for fire cases using the algorithm of fitting circular wall based on rectangular unit. It was summarized the effect of circular wall on air heating-up process for large-space structure under fire. Moreover, the empirical formula of air temperature in large space structure, which considered the effect of circular wall under fire, was established by a nonlinear curve-fitting method with MATLAB program.

关 键 词：大空间 火灾温度场 非矩形几何模型 曲线拟合 

分 类 号：TU352.4[建筑科学—结构工程]