Seismic Performance Analysis Of Coupled Steel Plate Shear Wall Structures

The steel plate shear wall(SPSW)is an anti-lateral force system with high strength,initial stiffness,ductility and energy dissipation capacity,which composed of the boundary frame and the embedded steel plate.Connecting two SPSWs with coupling beams(CB)to form a coupled SPSW(CSPSW)can not only meet the needs of opening doors and windows,but also make the layout of SPSW more flexible.Through the interaction of the CBs,the CSPSW have greater lateral stiffness and resistance to the overturning moment,thus reducing the thickness of the steel plate and reducing the cross section of the boundary frame elements.Therefore,the CSPSW is an economical and effective lateral force resisting systemFirst,the design method of the coupled steel plate shear wall is established,which based on the stress analysis of the coupled steel plate shear wall.It suggests that calculating the degree of coupling(DC)in CSPSW should consider of the different deformation characteristics of the CBs.Different calculation formulas should be used for bend-type and shear-type CB.Through the example of two CSPSWs,the correctness and reliability of the design method and the calculation formula of the coupling ratio were verified.Taking deformation characterics of CBs(bend-type and shear-type)and the DC as the main parameters,nine 6-story SPSW-WCs are designed.The influence of CB on structural strength,stiffness,deformation,hysteretic behavior and energy dissipation of CSPSWs was studied,which using the finite element software ABAQUS and Opensees to perform static pushover analysis and hysteresis analysis.The result show that the interaction of two wall generated by CB can significantly improve the lateral resistance of the CSPSWs.The energy dissipation capacity of the shear type CB is better than that of the bend type CBs.The reasonable range of DC is 35%~45%.There are three 20-story Frame-CSPSW structure system,which designed with three different DC.The finite element software ABAQUS was used to perform the specification response spectrum analysis,ground motion time history analysis,and static pushover analysis.The results show that Frame-CSPSW structure system has excellent seismic performance.The plastic development distribution of the structure with a DC of 40% is the most reasonable,and the total steel consumption of the structure is the least,and the economical efficiency is the best.Finally,summarizing the conclusions obtained in this paper,several design suggestions are put forward for the design of the CSPSWs.