The comparative analysis of seismic performance on three different forms of special-shaped column frame structure

In order to improve the seismic performance of the traditional reinforced concrete special-shaped column frame structure, steel reinforced concrete and concrete-filled steel tube special-shaped column frame were served as succedaneum. In the premise of the same size of column, axial compression ratio and beam section, two span and three storey of special-shaped columns exterior frame and middle frame were modeled based on Opensees finite element software, then pushover analysis and hysteretic performance analysis were carried out based on Opensees finite element software, and compared with ordinary reinforced concrete special-shaped column frame, the numerical simulation results show that: the bearing capacity increased, the ductility is greatly improved, the seismic performance of concrete-filled steel tube special-shaped column frame is the best in the three frames, the results can provide reference for the study on the seismic behavior of special-shaped column structure