| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 285202 | Journal of Constructional Steel Research | 2012 | 8 Pages |
This paper is concerned with the application of a proposed approach, denoted as SAAFE Program (System for Advanced Analysis for Fire Engineering), developed to provide inelastic analysis of steel and composite (steel-concrete) 2D framed-structures exposed to fire. The method, although similar in concept to earlier plastic-hinge approaches, differs in relation to both numerical methodology and precision, allowing accurate description of the structural non-linear response with little computational effort, when compared to that of the general FEM formulation. The analysis is based on the two-level approach, in which the cross-section and member are continuously performing in an interactive way. The variation on member is performed by a transient heat-transfer analysis model, accounting for thermo-dependent properties of heated materials. A second-order plastic-hinge model is formulated in a succinct format considering yielding progress during fire and accurate identification of member instability. Obtained results for calibration examples are compared to those of the FEM approach, showing reasonable agreement. A proposed multi-storey composite framed structure is assessed by SAAFE, outlining the advantage of considering advanced analysis in the current fire-design practice of structures.
► Approach provides inelastic analysis composite 2d framed-structure under fire. ► Accurate description of non-linear response with little computational effort. ► Obtained results show reasonable agreement to fem approach. ► Able to perform multi-storey composite framed structures.
