FIRE DESIGN OF STEEL MEMBERS - Civil and Natural Resources ...

4.3.1 Results from simulations with the SAFIR programme:
1000
Temperature ( o C)
800
600
400
200
0
0 10 20 30 40 50 60 70
Time (min)
ave max min
Figure 4.7: Maximum, average and minimum temperatures found from the SAFIR 1 results of a
simulation of a 530 UB 82.0 beam exposed to the ISO 834 fire on 3 sides, (no slab).
1000
Temperature ( o C)
800
600
400
200
0
0 10 20 30 40 50 60 70
Time (min)
max min ave
Figure 4.8: Maximum, average and minimum temperatures found from the SAFIR 2 results of a
simulation of a 530 UB 82.0 beam exposed to the ISO 834 fire on 3 sides with a 150 mm slab on
the top flange.
Figure 4.8 shows a much larger spread in maximum and minimum temperatures
for three sided exposure with a concrete slab in place than Figure 4.7 which does
not have a slab. The temperatures in Figure 4.7 merge to within 10 °C at the end
of the simulation, which is around a 1 % difference in results when the
temperatures are over 900 °C. The maximum difference in the results from Figure
4.7 is 179 °C, which occurs after 10 minutes. At this time the temperature range is
from 353 to 532 °C
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