Analysis And Research On Energy Dissipation And Seismic Reduction Of Frame Structure

Frequent occurrence of earthquakes,for human it become the main disaster.For reduce disasters,we have improved buildings of design.In order to overcome the shortcomings of the traditional seismic design,The energy dissipation structure with energy dissipation technology is developed.This dampers are widely used in engineering due to their good performance.This paper using single damper and combined damper to analyze the earthquake resistance of structure.Using SAP2000 to analyze the seismic performance of a 12 story frame structure.The analysis methods are time history analysis and nonlinear static analysis.The main contents are as follows:（1）Expounds the development of building design and introduced energy dissipation。understands the development and energy loss at home and abroad through literature and books.Next introduces BRB and viscous dampers in the aspects of theory,structure classified and mechanical model.China seismic design on response spectrum theory basis.To analyzed response spectrum method,nonlinear static analysis and time history analysis.（2）Three-dimensional model of 12-storey frame structure was established in SAP2000.The results of SAP2000 modal analysis,mass and base shear are compared with those of PKPM.Then analyse the structure using response spectrum、under rare earthquake using the method of pushover,compared original structure and structure with BRB of base shear displacement diagram,plastic hinge and other performance.The results show that the structure with BRB is improved,Increase seismic defense.（3）The time history analysis of three structures under different seismic waves is carried out.Under different seismic waves,compared displacement angle,base force,top displacement,floor velocity and hysteretic curve of dampers.The analysis shows that seismic performance of the two dampers is better than that of the original structure.Under small earthquakes,scheme 2 has good performance;while under great earthquakes,scheme 1 has the best control on the bottom story displacement angle and the displacement of the top.According to the different damping advantages of single damper,two optimization schemes of combined damper and viscous damper are set up,and compare the results of scheme under small and great earthquakes.Scheme 5 has the best energy dissipation effect,and scheme 4 has the best comprehensive performance under rare earthquakes.