Abstract
This article presents a series of 10 fire resistance tests on steel columns built up from cold-formed steel (CFS) profiles. Relevant performance parameters such as load levels, restraint to thermal expansion, and encasing of the columns with fire protection material are used in this research. It is also presented a numeric, three-dimensional non-linear finite element model for simulating the behavior of these columns. The model was calibrated based on the experimental results. The fire resistance of the bare columns' tests did not exceed 10 min, however, this amount of time considerably increased, up to almost 90 min, for the columns with plasterboard hollow encasement. Plasterboard hollow encasement is presented as an alternative to increase the fire-resistance performance of built-up cold-formed steel columns.
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