Fire tests on beams with class 4 cross-section subjected to lateral torsional buckling

Martin Prachař, Michal Jandera, František Wald


This paper describes experimental research in behaviour of laterally unrestrained beams (I or H section) of Class 4 constant or variable cross-sections at elevated temperatures. Preparation and design of experiments is described. The design of the test set-up was made by FE modelling and the experiments followed. The test results are given. Future numerical investigation is planned for full understanding of the fire behaviour of steel members of Class 4 cross-sections considering both welded and hot-rolled I or H shape steel profiles.

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