SR55 Finite element program for modelling the structural response of steel beams exposed to fire (2007)

This report summarises work carried out in a research project aimed at modelling, by computer, the performance of building components when exposed to fire.

A finite element computer program (NISA) was used to predict deformations of steel beams. Useful results were obtained.

The study concludes that the program is useful for analysing fire-resisting performance. Structural steel I-sections have been modelled in this study, with relatively good agreement being achieved between calculated and measured values for temperatures up to about 600°C. At higher temperatures, the effect of steel creep needs to be accounted for.

Further work is required to establish the same level of confidence for other materials and types of components.