ABSTRACT
ABSTRACT: Based on the utility temperature elevation empirical formula in large space fire, the nonlinear finite element analyses of the fire performances on two kinds of space frame structures, one Kiewitt (K6) single layer reticulated dome and the other square pyramid space grids structure, are numerically simulated with the thermal parameters specified in the EUROCODE 3 and the stress-strain relationship allowing for strain-hardening of steel. The temperature fields and the displacement properties of the two structures are studied under local fire. According to the results of the analysis, it shows that most of the ultimate fire-resistant duration are smaller than 2 hours under different local fires; the influence of the fire height is the biggest on the ultimate fire-resistant duration of the structure, and the effect of the fire location is bigger than the area of the fire.
