A new type of anti-buckling stage energy dissipation shear damper and its performance analysis
In order to solve the problem that the traditional shear-type metal damper has a single form of energy dissipation and the shear web is prone to premature local buckling,a new type of anti-buckling and staged energy dissipation shear damper is designed.The damper is mainly composed of a shear web and anti-buckling energy dissipation parts.The anti-buckling energy dissipation parts are distributed on both sides of the shear web,and the upper and lower ends are connected with a fixed frame.In order to investigate its energy dissipation and buckling resistance,the traditional shear damper test model is taken as a reference in this paper,and 14 groups of numerical models are established by ABAQUS finite element analysis platform.The effects of the section shape of the anti-buckling energy dissipator parts,the type of materials used,and the connection mode with the fixed frame on the performance of the damper are analyzed,and the stiffness degradation coefficient and the equivalent viscous damping ratio are used as evaluation parameters to evaluate the seismic performance of the new damper.The results show that the maximum out-of-plane displacement of the shear web of the new damper with buckling-restrained damper is less than 1/4 of that of the traditional damper.The maximum yield displacement ratio of the buckling damper to the shear web exceeds 3∶1,which can effectively prevent the premature buckling of the shear web,and thus has the capability of multi-stage energy dissipation.Compared with the traditional shear damper without the anti-buckling parts,this new type of damper has strong energy dissipation capacity,stable hysteretic performance and good seismic performance which can meet the seismic design requirements of practical engineering structures.
shear damperstaged energy dissipationanti-buckinghysteretic performanceseismic per-formance
万方数据
维普
