Experimental Study On Seismic Behavior Of Steel Frame-steel Plate Shear Wall Structures

The steel frame structure has advantages of small occupation area and simple construction process. But the lateral stiffness of steel frame structure is low. When the frame under horizontal force such as wind load or seismic force, it is easy to produce large interlayer displacement. The steel frames need to choose reasonable anti-literal force members in order to increase its lateral stiffness to resist lateral force. Steel plate shear wall has large lateral stiffness and good ductility and energy dissipation. As a component to resist lateral force, the steel plate shear wall filled with steel frame can improve the lateral stiffness of the steel frame structure effectively. In this way, it can weaken the requirements of connection stiffness of the frame. The steel frame can choose semi-rigid connections which have the advantages of low cost and good ductility. We can get the semi-rigid steel frame-steel plate shear wall structures(SFSW).In order to have a good understanding of the seismic behavior for the semi-rigid steel frame-steel plate shear wall structures(SFSW), a 1/3 scale SFSW specimen is designed based on an office building as a prototype. The semi-rigid joint is Extended End-plate Bolted Connection. The characteristic of hysteretic behavior, local performance and force transmission and distribution are investigated according to a cyclic loading test conducting to the specimen. The results are as follows.(1)The steel plate shear wall and semi-rigid steel frame composed double system to resist lateral force. The plastic hinges produced in column and semi-rigid connection and the local tearing occurred in steel plate. The plastic deformation capacity and energy dissipation ability of the structure is good. But the stiffness loss of the structure is more serious.(2)The post-bulking strength of steel plate shear wall is high. The structure has good carrying capacity.(3)The deformation mode of SFSW is bending mode and the deformation of second floor is strong than bottom.(4)The deformation of Extended End-plate Bolted Connections under horizontal reciprocating load is not obvious. As the lateral loads increase, semi-rigid connections start rotating to participate in resisting lateral force. The Extended End-plate Bolted Connections have the advantages of simple construction and good economics comparing with other connections.(5)The development of tension belt of second floor is greater than bottom, and the stress of steel plate connected with frame is larger than others.(6)The structure through angle steel and steel plate tension belt and deformation of the frame bear the horizontal force. The internal force transmission and internal force distribution of structures are reasonable. The steel plate shear wall share 50%~80% lateral loads and 60%~80% of the overturning moment is undertaken by steel framework.