Research On Shock Absorption Control Technology Of Medical Buildings In High-intensity Areas

When a strong earthquake occurs,a large number of houses will be damaged and collapsed,threatening the safety of human life and causing huge property losses.Medical buildings are an important project in the urban lifeline system.After the earthquake,the normal operation of medical buildings will ensure the smooth operation of emergency rescue work.Proceeding plays a pivotal role.At present,there are relatively few practical applications of using viscous damper technology in medical buildings.Therefore,in order to supplement and improve the existing seismic design system of medical building structures,this paper studies the seismic performance of medical buildings in high-intensity areas under the action of viscous dampers.Based on the relevant research results at home and abroad,this paper takes a medical building(frame-shear wall structure)in the 8 degree area as the engineering background,and applies the viscous damper to the medical building.Using ETABS software,the time history analysis of traditional earthquake-resistant structures and viscous damper damping structures under three different seismic waves was carried out under frequent and rare earthquakes,and the seismic response of the damper to the structure after the structure entered the elasto-plastic state was summarized.Analyze the structure of four different dampers arrangement schemes and 3 kinds of viscous damper damping structures with different damping exponents,and summarize the influence of damper arrangement and damper damping exponent on the seismic response of the structure,and get conclusion as below:(1)The viscous damper is a pure damping component,and the viscous damper can be arranged in the building to reduce the structural vibration without changing the structural rigidity;from the structural base shear table and the interlayer shear table It can be seen that after the viscous dampers are arranged,the base shear force of the structure is reduced by about 20% in the X and Y directions,and the interlayer shear force of the structure is reduced by about 10% to 50% in the X and Y directions.;Comparing the maximum interstory displacement angle of the two structures,it can be found that after the viscous dampers are arranged,the maximum interstory displacement angle of the structure is reduced by about35%,which significantly improves the seismic performance of the structure;comparing the interstory acceleration of the structure,it can be seen that the layout After the viscous damper,the floor acceleration of the structure is reduced by about 10% to 30%,which ensures the stability of the structure;from the hysteresis curve of the viscous damper under rare earthquakes,it can be seen that the curve is full and the envelope area is large,indicating The viscous dampers have strong energy dissipation capacity;after the viscous dampers are arranged,the additional damping ratio of the structure reaches 0.05,which meets the design goals.By comparing the seismic capacity of the viscous damper damping structure and the traditional seismic structure,the results show that the damping structure has a significant reduction in base shear force,inter-story shear force,inter-story displacement angle and inter-story acceleration,etc.The superiority of viscous dampers in seismic design is presented,which provides a reference for the seismic design of medical buildings in actual engineering.(2)The arrangement position of the dampers has a great influence on the damping effect.The floor where the dampers are arranged can effectively reduce the dynamic response of the floor under the action of an earthquake;evenly arranging the dampers on each floor can greatly improve the seismic performance of the structure.But it cannot meet the economic needs;arranging dampers on the floors with large displacements between the structural layers can make the structure meet the seismic goals while achieving the economic goals;when the damping index of the dampers is reduced,all aspects of the structure will be damped.The effect is increasing,but it is not that the smaller the damping index,the better.The dampers should be selected reasonably according to the seismic target.