Study On Seismic Performance And Optimization Of A Novel Partial Seismic Isolation System

Recently,the structures in China have basically reached the seismic fortification goal of "no damage under small earthquakes,repairable under moderate earthquakes and no collapse under large earthquakes".There are many research results on the overall seismic performance and seismic reinforcement of building structures,but there are few studies on the local damping technology of existing buildings.In this paper,a novel partial seismic isolation system is proposed for important rooms such as operating room and aviation command center to ensure the new and existing buildings with special functions can continue to work during and after the earthquake.In view of the above research objectives,this paper first takes a reinforced concrete frame structure as the research object,and uses numerical simulation method to establish a refined structure model.The damping effect of the partial seismic isolation system,the overall seismic effect of the structure,and the design safety of the partial seismic isolation system are analyzed.Secondly,through the optimization design of the partial seismic isolation system,the damping effect of the type and parameters of the isolation bearing,the location and load of the isolation room on the local room is analyzed,and the partial seismic isolation method suitable for different functional objectives is proposed.Finally,taking the practical engineering of frame structure and frame shear wall structure as an example,the application effect of partial seismic isolation system in practical engineering is analyzed,and it is found that the proposed system is also suitable for frame shear wall structure.The research results show that the novel partial seismic isolation system is suitable for frame structure and frame shear wall structure,which can significantly reduce the seismic response of the isolated room,and ensure the use function of local isolation rooms during and after the earthquake.Through the optimization analysis of the isolation system,it is found that with the increase of the floor position of the isolated room,the isolation effect of the isolated room is weakened,but the overall seismic performance of the structure is improved.The horizontal position of the local isolation room has limited influence on the seismic performance of the structure.Therefore,in the practical application of partial seismic isolation system,the optimal local isolation layout scheme should be selected according to the structural characteristics and functional objectives.