Research On Optimum Design Of The Viscoelastic Dampers

The construction vibration control is one of the hot problems within the seismic fortification techniques now.Viscoelastic dampers(VED) is a kind of efficient passive control device. It reduces the seismic response of structure by adding the damping and dissipating the vibration energy of the structure. Because this devise is simply and the components are cheap, the viscoelastic damper has a broad application foreground.Because of the particularity of the structure fixed with viscoelastic and the faultiness of the study about this field, it is necessary to perform the optimum design.In this paper, the features of the viscoelastic dampers and design methods of the structures with adding viscoelastic dampers are viewed. Then combined code a convenient method about choosing position of viscoelastic dampers is put forward based on principle of VED dissipating energy.In this paper, the research object is based on a 10-floor reinforced concrete structure. Four structure systems such as frame and three kinds of dissipate energy and reduce seismic responses structures installed with viscoelastic damper are used to build up as three-dimensional modals by ANSYS program —a finite element method. ANSYS program is used to analyze the modals' intrinsic characteristics. ANSYS program is also used to analyze the elastic dynamic time history analysis of EL —centro seismic wave and Kobe seismic wave at usual level and unusual level. The results are obtained after analysis and comparing.The research result illustrate that viscoelastic damper is not only can work effectively under usual level seismic but also can do it under unusual level seismic. After the optimum design of the structure with viscoelastic damper, the structure's seismic fortification ability is markedly improved...