Numerical Investigation of the Post-Fire Performance of Steel Columns

Research on the seismic performance of steel structures has led to development improved structures, which minimize structural and non-structural damage can be reused immediately after an earthquake. Moreover, significant advances have been made for predicting response members, connections, systems exposed fire. Nevertheless, research reuse a fire event is limited. A structure designed according current codes survive without may repaired reused. Therefore, it great importance study whether safe in high seismicity areas. This paper investigates columns that are pre-damaged due For this purpose, sophisticated finite element models developed validated against experimental data. It was concluded accurately predict behaviour beams-columns at elevated temperatures. First, studied using simplified boundary conditions; surrounding not included numerical model. Thermal-structural analyses were performed determine induced by Subsequently, cyclic investigated, considering both residual post-fire deformations proper material properties. Aiming obtain more realistic results, complicated interaction between heated considered modelling. reason, resistant frame simulated. Then, fire-damaged under loading assessed. The analysis results demonstrates effect columns.