Study on damping effect of CFST frame-core wall structure with viscous dampers

In this paper,a 30-storey concrete filled steel tube(CFST) frame-core wall mixed structure is studied,which was set with the same number viscous dampers in different locations of structure and different connection types,then four damping schemes were created.Elastic-plastic time-history analyses are performed on structure with different damping schemes under three seismic waves,whilst the calculation results are studied and analyzed comparatively.The results show that under the strong earthquake action,this structure exerts certain control effect on the aspects of inter-story displacement angle,story shear force and energy dissipation of structure by setting the viscous dampers in CFST frame-core wall structure.The damping effect is influenced by the connection types and the setting locations of dampers,and the damping effect is most obvious when the viscous dampers were set evenly between the column and the core wall along the height of structure.In conclusion,the seismic performance of the structure has been improved.If the setting locations and the connection types of the damper could be optimized,the maximum of the damping effect would be achieved in the design of practical engineering.