Study On Seismic Performance Of Concrete Frame Structures With Additional Node Damper

As a new and popular seismic technology,energy dissipation technology is a hot research direction in engineering,which is suitable for energy dissipation reinforcement of new buildings and existing buildings.By setting energy dissipation members in a specific position of the structure,the energy in the structure is consumed by the elastoplastic or shear hysteresis of the members,so as to avoid the plastic deformation of the structure and ensure the safety of the structure and the person.In this paper,a combined structure is arranged at the node of an existing structure,and connected by a sub-frame: a steel-concrete frame structure with joint damper is added.The main contents of this paper are as follows:(1)In order to study the seismic performance of the steel-concrete frame structure with additional joint dampers,three seismic waves are input into the steel-concrete frame structure and the pure frame structure with additional joint dampers.The acceleration,velocity and displacement response of the joint are tested,and the shear deformation curves of the pure frame structure and eight working conditions are analyzed.Based on the results of the vibration table test,the damping effect of the steel-concrete frame structure with additional joint dampers is obviously better than that of the pure frame structure,which is the whole structure Yield failure,while pure frame structure stress concentrated on a certain floor belongs to interlayer failure.The structural system can enhance the seismic performance of the structure by increasing the stiffness of the structure under the action of small earthquake,and the energy dissipation capacity of the structure can be enhanced by the deformation energy dissipation of the joint damper under the action of large earthquake;(2)In order to discuss the location and quantity of dampers,eight different working conditions are listed.By comparing the damping effect of eight different working conditions,it can be found that the damping effect of the floor is better when the dampers are arranged on a specific floor.The optimum damping effect is achieved,the structural acceleration coefficient can reach 64%,the interlayer displacement coefficient is as high as 52.4%,and the dampers are arranged in each layer of the frame side column,which can achieve the optimal damping effect and save economy;(3)On the basis of shaking table test,the structural model of steel concrete framewith pure frame and joint damper is established by finite element software,and three seismic waves are inputted for analysis.The results show that the damping effect of the two structures is consistent.The finite element model is accurate and reliable.