Fire Safety Science Digital Archive

Previously, we have conducted measurements of heat flux and temperature distribution of the H-shape beam installed beneath a ceiling and exposed to a localized fire source. From the results of the experiment, heat flux distribution on every part of the beam was formulated. In this paper, the temperature distributions were computed by the finite different method using experimental heat flux data and compared with results of the experiments to evaluate the applicability of the analytical technique. The result shows that when compared with the experimental data, the temperature distribution on the axial direction of the member can be predicted with about 15% error in the range of O.5m from the stagnation point, and with 20% error or less in other positions. In order that this model may be applied to an actual building, we assume two cases: one is that the temperature is calculated with the experimental data of heat flux approximated by a functional equation, and the other is a case that the experimental data is input in the model directly as mentioned above: and these two cases are compared with each other in their accuracy. In the same scheme, several kinds of metal material properties data were used in the calculation to know the heating conditions which may achieve the allowable range of temperature required in the current regulation.