Post-earthquake Fire Resistance of Concrete-Filled Tubular Steel Columns

Following an earthquake, a building's capacity to withstand fire greatly diminishes, and the risk of fire also increases significantly. Although fire following an earthquake has a severe effect on structure, the subject has not been studied well. In this paper, the behaviour of concrete-filled steel tube (CFST) columns is presented under fire loading followed by an earthquake by using ABAQUS, a finite element-based analysis tool. The steps involved in numerical modelling were cyclic analysis and sequentially coupled thermal stress analysis. The output from the cyclic analysis was used as an input for the sequentially coupled thermal stress analysis. The results from the numerical analysis showed that the column with residual deformation failed early than the undamaged column.