Seismic Response Analysis Of An Irregular Frame Shear Wall Structure With Base Composite Isolation

Since twenty-first Century,earthquake disasters happen frequently at home and abroad,which seriously endanger people's property and personal safety.With the development of science and technology,many new ideas for mitigating earthquake action have been developed,among which the development of isolation technology is more rapid.The experiments and facts have proved that the building with isolation technology can effectively reduce the disaster loss when the earthquake comes.The irregular structure of the earthquake prone to torsion,which causes serious damage to the structure,which is of great significance to the study of the isolation of irregular structures.First,the classification,construction and mechanical properties of the commonly used isolator are introduced,and then the dynamic equation of base isolation is established,and the solution of the system dynamic equilibrium equation is deduced,which provides a theoretical basis for subsequent analysis.Secondly,taking an irregular frame shear structure as an example,the characteristics of seismic response after using isolation technology are discussed.The finite element analysis software Midas/Gen is used to establish six analysis models,The control group is a kind of original aseismic structure,and the other five are based on the structure of different isolation bearings.Lastly,a reasonable seismic wave is selected for dynamic time history analysis under the action of rare earthquake,and the variation of vibration mode and period,interlayer shear force,layer displacement,layer acceleration response and hysteresis curve of isolation bearing are compared.The results show that the base isolated structure can effectively reduce the adverse effect of the earthquake,the laminated rubber bearing and lead rubber bearing joint use can play a better isolation effect analysis: through the optimization of reasonable arrangement,can reduce the torsional period ratio of the structure,reduce the acceleration peak value decreases,the most unfavorable shear and layer displacement.In order to reduce the adverse response of structure under earthquake,the seismic effect of the irregular structure of the upper part of the control.