Modelling progressive failure of steel moment frames exposed to localised fire

Abstract

This paper presents modelling of the progressive failure of steel moment frames subjected to localised fire. A finite element approach using the software ABAQUS has been developed to analyse the structure. An explicit-dynamic solution was adopted to solve the non-convergence problems caused by element buckling. A series of validation analyses were carried out to ensure that the results were within an acceptable level of accuracy. The analysis results are shown to match well with the previous experimental data and analysis. This modelling approach allows detailed insights to be obtained into the structural robustness of such frames in fire situations.

Improving the robustness of steel frame structures under localised fire conditions

“…However, the parameters affecting the structural robustness in a fire have not yet been explored. To address this gap, this study extends previous work by Suwondo et al (2019) on modelling progressive failure of multi-storey steel moment frames exposed to fire. The modelling approach is adopted to undertake parametric studies to identify effective methods to improve the robustness of such structures under fire conditions.…”

“…The simulations showed that ignoring the dynamic effect may produce lower displacement of the structure and lead to less conservative design. Suwondo et al (2019) performed progressive collapse analysis of composite building under fire following an earthquake. Initially, the analysis of the undamaged building was performed to study load redistribution path and members' interaction.…”

“…Suwondo et al (2019a, b) performed progressive collapse analysis of a composite building under fire following an earthquake. Initially, the analysis of the undamaged building was performed to study load redistribution paths and members' interaction.…”