The Analytical Investigation of Thermal Behaviour of Steel Structural Beam Component

Abstract

The architectural flexibility of steel structure dominates over other conventional structures, but fire and its associative load are one of the major accidental loads, which could be fatal in steel structures. Load bearing capacity of steel structural components
drastically reduces in the fire condition. In this paper, the performance of steel structural components under accidental fire loads
is investigated. Constraints in the experimental investigation lead to the analytical investigation by the method of finite elements.
ISO 834 is adopted as standard fire curves for modelling up-to temperature of 6800 C. Computational structural models including
the earthquake loads will be analysed with the help of advanced structural software. Beam components of the critical section are
optimised and processed to thermal analysis. In general effects of rising of temperature in the fire hour induce an expansion in
beam components. If the expansion is restrained, stress induces over the region of restraining, resulting in the change or rise in
deformation. In this attempt, the study of behaviour on non-coated and protective coated steel beam structures under direct
thermal loading with relation with the total deformation and stress- strain are investigated with help of FEM based software.