Study On The Vibration Control Of SMA-Friction Three-Dimensional Isolation And TMD Hybrid Structures

Seismic isolation technology is one of the main technologies for structural seismic response control at present.The horizontal seismic isolation technology of building structures is gradually mature,and there are corresponding industry regulations.However,due to the contradiction between the bearing capacity and the stiffness requirement of the structure in the vertical direction,the research progress in the vertical or three-dimensional seismic isolation of the structure is slow.In this paper,a 3d seismic isolation bearing composed of SMA spring,friction element,butterfly spring and lead damper is proposed,and it is combined with TMD to control the 3d seismic response of the structure.The main content of this paper is as follows:(1)Fully grasp the basic principle of isolation system and TMD technology,fully understand the development history of isolation technology and TMD technology as well as the research status at home and abroad,get familiar with the research progress,and propose the research content of this paper.(2)According to the principle of the three-dimensional isolation technique to design a SMA-friction,the three-dimensional isolation bearings on the working principle of bearing,each of the component in the bearing mechanics performance test study,the results show that the bearing on the level to have good energy dissipation and recovery performance,vertical has good support and energy dissipation capacity.(3)SAP2000 software was used to simulate sma-friction three-dimensional isolation bearing,and the simulation results fitted well with the test results.A reinforced concrete frame structure is established and the isolation design is carried out with the designed bearings.The calculation results show that the response of base shear,inter-storey displacement and top floor acceleration of the structure decreases to a certain extent after the installation of sma-3d friction isolation bearings,and the effect is good.(4)On the basis of installing sma-3d friction isolation bearing,TMD is added to the top of the structure for hybrid control.The calculation results show that the response of base shear,inter-storey displacement and top floor acceleration of the structure further decreases after TMD is added,indicating that hybrid control has better effect than single isolation.