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

Rectangular geometric model has been used universally for the numerical simulation of air temperature inlarge space structure under fire. For practical structures, however, in order to meet the function and architecturalmodeling requirements, the geometric shapes of large space building are often with curved surfaces or shell. In thispaper, computer simulation was performed by FDS program for fire cases using the algorithm of fitting circular wallbased on rectangular unit. It was summarized the effect of circular wall on air heating-up process for large-spacestructure under fire. Moreover, the empirical formula of air temperature in large space structure, which consideredthe effect of circular wall under fire, was established by a nonlinear curve-fitting method with MATLAB program.