Advanced analysis for the assessment of steel frames in fire

摘要

This paper describes the methodology of an advanced analysis technique for studying the large-displacement inelastic behaviour of building frame subjected to localized fire. The main feature of the proposed analysis is its use of one element per member to model each structural component and thereby obtain a realistic representation of material and geometrical nonlinear behaviour of the overall framework. Both ISO fire and natural fires can be simulated by the analysis model. The transient heat transfer is calculated by using a refine finite element mesh, whereas the structural responses are calculated with a nonlinear finite element technique based on an elasto-plastic beam-column formulation.