Seismic Performance Analysis Of Frame-shear Wall Isolation Structures Under Rare Earthquakes

With the continuous application and development of isolation technology,people's research on isolation structure is getting deeper and deeper.In order to study the seismic performance of the isolated structure,this paper takes an engineering structure as an example and USES the finite element analysis software to establish the frame-shear wall isolated structure and non-isolated structure for the following aspects:(1)this paper introduces the development of foundation isolation technology and the basic principle of foundation isolation structure in detail.The classification,mechanical model and parameters of isolated structures are introduced.The analysis method of dynamic elastoplastic analysis and the basic theory of analysis software are introduced.(2)finite element software is used to simulate the structure,and input and check the isolation bearing.The seismic performance of the frame-shear wall isolated structure is analyzed under the condition of earthquake prevention,and the seismic performance is compared with that of the frame-shear wall structurewithout seismic isolation.The basic period of isolated structures is compared with that of non-isolated structures.The damping coefficient of the structure reached 0.24.The results show that the seismic response of isolated structures is much lower than that of non-isolated structures.Accept and analyze the isolation rubber bearing to see that the bearing meets the use requirements.(3)the dynamic elastoplastic analysis of isolated structure and non-isolated structure under rare earthquakes is carried out,and the maximum compressive stress,maximum tensile stress and maximum horizontal displacement of isolated rubber bearing in rare earthquakes are analyzed,and it is concluded that the isolation bearing can still meet the requirements in rare earthquakes.And the isolation of vibration isolation structure based on the analysis of the structure reinforcement of two kinds of structure under severe earthquake analysis concluded that,in terms of overall damage to the structure of the first layer is part of the damage statistical analysis,the structure of two kinds of coupling beam of shear wall and the damage models are analyzed,the structure of the different period of damage is analyzed,the different structure of the overall damage intensity were analyzed.The damage evolution of the frame-shear wall structure under rare earthquakes is analyzed from different angles,and it is found that the isolated structure can reduce the damage of the structure in rare earthquakes and play a good seismic role.