Analysis Of Seismic Performance Of The New SCBRB

Earthquake resistance has always been one of the research topics of high rise structures.The steel support in the structure is one of the main forms of the earthquake resistant structure of high rise structures.Buckling restrained brace can ensure the inner core material can enter the yield state under tension and compression condition due to the restraint of the casing to the inner core,thus improving the hysteretic performance of the buckling restrained brace.However,buckling restrained braces dissipate energy through elastoplasticity of steel,resulting in large residual deformation after large earthquakes,which is also a damage to structures.Therefore,this paper presents a new type of anti-bending support component with self reset function to optimize the seismic performance of the traditional support structure.The supporting energy dissipation system is composed of cross energy dissipation inner core,and externally connected square steel tube is used as a restraint sleeve,and the cross inner core connecting section is fixed with the spring end plate,which is connected with the end of the outer steel tube through a high-strength spring,and becomes a supporting reset system.In this paper,the seismic performance of the support is analyzed.The main contents are as follows:According to the theoretical analysis,the stability analysis of the bracing spring stiffness and the stability analysis of the inner core are considered.With reference to the existing research test,the specific support size of the new self reset and anti buckling support is calculated.And through the finite element analysis software ABAQUS to build the model for numerical simulation analysis,get the support of the hysteretic curve analysis and comparison of the external factors of the support,consider the constraints,the support gap factor,friction factor and spring stiffness on the supporting performance.Finally,establish a framework model,using SAP2000 software on the same three frame structure model of BRB,self reset common BRBs,without support are arranged by analysis of Pushover nonlinear static comparative structure analysis,through the analysis of deformation and displacement angle to observe the three frame base shear top displacement map and layer.