Computationally Efficient Method for Steel Column Buckling in Fire

The stability of axially loaded steel columns with compact rectangular hollow sections at elevated temperatures is studied in this paper. current Eurocode model for checking the buckling resistance fire was developed on a similar basis to that ambient conditions. Due effect complex non-linear behaviour fire, standard design not always fully appropriate, and certain parameter ranges may give unsafe results. In work, an analytical method determine proposed, accounting variable stiffness properties which have significant effects flexural fire. A finite element developed, extensive numerical study performed explore different parameters behaviours temperatures. proposed validated by comparing performance results model. Its improved accuracy respect verified. advantage new technique its computational efficiency, valuable reliability evaluations or data-based procedures demanding numerous calculation cycles. potential probability-based analysis supported format, enables us explicitly handle uncertainties essential parameters. framework suitable extension incorporate material models section types.