Seismic behavior of composite frame infilled composite steel plate shear walls

Concrete-filled steel tubes (CFST) and composite steel plate shear walls (CSPSW) have advantages of high bearing capacities, high stiffness, excellent energy dissipation ability, and so on. Concrete-filled steel tube can be used as a column in composite frames. If composite steel shear walls are installed in composite frames, a new kind of composite structure is composed. As shear walls are not connected to frame columns, the premature overall buckling or local buckling failure of columns can be prevented. Meanwhile, the structural stiffness and bearing capacity can be adjusted by changing the size or the number of shear walls, which is attractive to both structural design engineers and architects. This paper presents the behavior of composite frame infilled composite steel plate shear walls connected with frame beams. A 20-storey composite structure model is developed using the finite element software OpenSees. Both the nonlinear static and dynamic response are analyzed to investigate the behavior of composite structures.