Influence Of Rubber Bearing Isolation Technology On Buildings With Different Periods

At present,rubber bearing isolation technology has been widely used in various multi-story and small high-rise buildings,and gradually applied to high-rise buildings.The rubber bearing isolation technology is also a relatively simple and effective damping technology,and has achieved good shock absorption.The rubber bearing isolation technology is widely used in the design of isolated structures at home and abroad.Its working principle is to regularly arrange the rubber isolation bearing between the foundation and the upper structure to form a plastic connecting device,which increases The vibration period of the building can reduce the horizontal stiffness and horizontal acceleration of the structure,and consume a part of the seismic energy,thereby reducing the damage of the superstructure caused by the earthquake.The isolation layer provides vertical load carrying capacity,lateral stiffness and resistance to torsion.This article focuses on the impact of rubber bearing isolation technology on different period buildings,including the difference in interlayer displacement and vibration period of the upper structure.In this paper,PKPM finite element analysis software is used to build three simple reinforced concrete frame structures with different heights as the analysis objects of different periods.The elastoplastic time history analysis method is used to load two natural waves and one artificial seismic wave.The seismic isolation performance and the reliability of the structure under rare earthquakes were investigated,and the differences and isolation effects of different period isolation structures were explored.To this end,this paper has done the following research:Firstly,the design principle of the basic isolation structure is analyzed and summarized.The application status and classification of the rubber bearing are introduced.The dynamic analysis of the simplified model and the solution of the dynamic equilibrium equation are emphasized.Then use the finite element software PKPM to establish a nonlinear threedimensional model,carry out the actual seismic simulation of the 8 degree zone,and compare and analyze the results of each structure.Finally,the isolation performance and differences of each structure are summarized.The results show that under the action of earthquake,the period of the isolated structure is at least 3-4 times that of the seismic structure,the inter-layer displacement,inter-layer shear force and acceleration are much smaller than the seismic structure;the isolation structure with different periods with height The periodicity,interlaminar displacement and acceleration of the structure increase gradually.The higher the height,the larger the period,the more significant the increase.The inter-layer displacement and the inter-layer displacement angle do not increase significantly with the increase of the structural height;the structural displacement is concentrated.In the isolation layer,the upper structure moves as a whole,and the base shear force is greatly reduced,which can be regarded as a single-mass structure.Figure48;Table41;Reference 48.