The Analysis Of Seismic Fortification Of High-rise EBSF With Viscoelastic Dampers

The construction vibration control is one of the hot problems within the seismic fortification techniques now. The viscoelastic damper and the application of viscoelastic damper in the high-rise building discussed in this paper, are part of the study about the application of the dissipate energy and reduce seismic responses techniques. The viscoelastic damper that made of viscoelastic material is a kind of representative passivity control devices. It reduces the seismic response of structure by adding the damping and dissipating the vibration energy of the structure. Because this device is simply and the components are cheap, the viscoelastic damper has abroad soolication foreeround.Through analysing the advantages and disadvantages of the eccentrically braced frames, The author has the thought that viscoelastic dampers are serially connected with brace in eccentrically braced frames. The author calls this kind of frames as energy dissipation eccentrically braced frames,having the function of "double fuse". But whether can this structure meet the thought? This paper compares the internal force, displacement and relative displacement of eccentrically braced frames and energy dissipation eccentrically braced frames under the intensity of frequently occurred earthquake and intensity of seldomly occurred earthquake through three examples and reflects the energy dissipation eccentrically braced frames having the better earthquake resistant behavior.Through the non-linear time-history analysis and arranging and analysing the conclusion, the displacement ,relative displacement and internal force of energy dissipation eccentrically braced flames are all reduced.Design method of viscoelastic dampers for structural seismic control is studied in the end of this paper. A convenient and pratical method about choosing parameters and locations of viscoelastic dampers is proposed for structural engineers.