Numerical analysis on seismic behavior of frame-novel steel plate shear wall with slits

Two kinds of steel plate shear wall with unequal length slit, called Butterfly and Fusiform can increase the stiffness and ultimate bearing capacity of wall without the dissipation capacity of shear wall reducing. This paper introduced these two kinds of steel slits wall into frame structure. Hysteretic behavior and energy dissipation capacity of steel slit wall were analyzed numerically and the results were compared with the frame-traditional steel plate shear wall with slits structure. Then, the wall frame simplified analytical model was applied to simulate the steel wall with unequal slits. The results were calibrated against the finite element model using shell elements. The results show that comparing with frame-traditional steel slits wall, the frame structure with new steel slits wall has higher initial stiffness and higher ultimate bearing capacity. Axial force of column has little effect on the stiffness of the structure and the effect on bearing capacity can be controlled within 20%. Axial force of column also has little effect on energy dissipation capacity, but with the increasing of axial force of column, the structure loses bearing capacity earlier and earlier. Wall frame simplified analytical model can simulate steel wall with the unequal slit accurately.