Seismic Performance Of Base-isolated Structures Based On Viscoelastic Dampers

At present,whether it is domestic or foreign,there are more and more high-rise buildings and super high-rise buildings in urban construction.The horizontal loads that buildings need to bear will be relatively large,and earthquake disasters are difficult to predict.How to reduce the earthquake caused by passive control Personnel casualties and property losses have become hot topics for research scholars at home and abroad.In this paper,the viscoelastic damper is placed in the base isolation structure,and the seismic performance of the base isolation structure with viscoelastic damper under earthquake action is analyzed.The main research contents are as follows:(1)Two common isolation bearings are selected.The base isolation structure model of two different isolation bearings is established by SAP2000 finite element software.The results show that the dynamic response of the base isolation structure under earthquake action can get reasonable control and good shock absorption.(2)The viscoelastic damper structure and the traditional seismic structure finite element model are established respectively.By comparing the results of the viscoelastic damper structure and the traditional seismic structure under earthquake action,it is shown that the structure with viscoelastic damper is excellent.The energy consumption can increase the damping and stiffness of the structure and reduce the response of the structure under earthquake action.(3)The viscoelastic damper is placed in the base isolation structure,and the dynamic time history analysis of the shock absorbing structure under different seismic waves is carried out.The traditional seismic structure,the base isolation structure,the viscoelastic damper structure and the setting are compared.The variation of the interlayer displacement and peak acceleration of the base-isolated structure of the viscoelastic damper in the case of multiple earthquakes and rare earthquakes shows that the base isolation structure with viscoelastic damper is better than the other three Kind of shock absorbing structure.