In order to overcome the shortcoming of low bearing capacity

low axial compression ratio

weak node and poor seismic performance of traditional reinforced concrete special-shaped column frame structure

the steel reinforced concrete structure and concrete filled steel tube structure were combined with special-shaped column structure. A two span three story planner full web type middle frame model was constructed on the basis of OpenSees software

and pushover analysis and hysteretic behavior analysis were carried out. By changing the axial compression ratio

the skeleton curves and hysteretic curve were obtained

and the related mechanical properties of bearing capacity

ductility and energy dissipation further analysis. Compared with reinforced concrete special — shaped column frame structure

the bearing capacity and ductility of steel reinforced concrete frame and concrete filled steel tube frame improved greatly. With the increase of axial compression ratio

the elastic stiffness of two types of special-shaped column frame was essentially constant

but the descending stage of force-displacement curve is steep and leads to a decreased ductility. In the same reinforcement ratio

the bearing capacity and the ductility of concrete filled steel tubular frame were higher than that of steel reinforced concrete special-shaped column frame

which can increase the speed of construction

but its fire resistance performance is poor. The research can provide reference for the scientific research and engineering design.