Viscoelastic And Viscous Dampers In The Building Damping Performance Analysis And Comparison

With the recognition of the importance of the aseismic engineering and the development of the research, vibration control has become a effective solution to help people reduce the response of buildings in earthquake. One of these methods, passive control using viscoelastic or viscous dampers, has been applied to more and more projects in the past, because they can reduce the seismic response effectively, economically and rarely need to be repaired after they are installed.A uniform mathematical formula has been established for the two devices consisting of brace and viscoelastic damper or viscous damper. After analysis of the parameters of the devices, a conclusion is achieved that we can directly use the parameters of the dampers instead of devices to design the buildings in the common situation. Then a one-freedom modal is used to compare the differences of performance between these two dampers under harmonic load. Finally, three buildings, which are installed with viscoelastic dampers, viscous dampers and no dampers respectively, are analyzed using finite element method, time history method and response spectrum method, and the result is the same as that of harmonic analysis. This result testifies not only the efficiency of the two kinds of dampers, but also the superiority of the viscous dampers over viscous-elastic dampers.