Theoretical Analysis And Test Verification And Practice For The Structures With Energy Dissipation Devices

The analysis and design for energy dissipation structures has been discussed in detail in this dissertation. The method based on performance and demands has been put forward. Shaking table test had been taken for the RC model structures of seismic retrofit with supplemental viscous damper in order to verify the effectiveness of the energy dissipation technology. In the last an analysis procedure, which is based on seismic performance level, for the seismic capacity of a steel frame has been presented.In the second chapter the magnitude of damping force and the stiffness of damper bracing, which are the earthquake resistance capacity parameters of energy dissipation structure, have been discussed.The parameters estimation and best selection of the energy dissipation structures are very important to controlling the performance under earthquake. In the third chapter a fast method to obtain the parameters and result of energy dissipation is presented, which is based on story model.In order to get better understanding of the earthquake resistant capacity of energy dissipation structures a shaking table test had been taken. The test models consisted of two 4-story RC model, one of them was retrofitted with supplemental dampers (D-Model for with dampers, WD-Model for without dampers). They were on the shaking table in row and were subjected to earthquake simulated motion simultaneously. The results showed that the test damping ratio was about 0.22～0.25 and nearly the same as estimated damping ratio. The D-Model had a lower peak acceleration 30～40%, lower peak displacement 57～80% and lower peak shear 8～61% than WD-Model. When two models appeared same story displacements the D-Model could undertake three times PGA earthquake simulated motion as WD-Model's. D-Model appeared high damping ratio characteristic and high vibration mode could not be easily evoked.In the fifth chapter seismic analysis of a steel frame structure with supplemental viscous dampers has been presented in detail. This is a practical work based on seismic performance levels and earthquake demands idea. The whole process can be used as reference for the other energy dissipation structures design.