CONTROL OF WIND-INDUCED VIBRATION FOR A SUPER-HIGH STRUCTURE WITH CANTILEVER-TOGGLE-BRACE VISCOUS DAMPER SYSTEM

摘要

This paper studies wind-induced vibration control of a 276-meter high super-tall building with cantilever-toggle-brace viscous damper system.Seven vibration control schemes were proposed to control structural dynamic response under wind excitations.Fluctuating wind time series occurring one time in 10-year and 50-year on the structure were simulated with a modified AR model.The dynamic responses of structure in the different schemes under wind excitations were investigated and the effects of wind-induced vibration control were discussed comparatively.The results show that the dynamic response of the structure under wind excitations can be controlled effectively by using the proposed schemes,the peak acceleration of top story and base shear of the structure under wind excitations can be reduced 38％and 11％,respectively.As a consequence,the validity and feasibility of structure with cantilever-toggle-brace viscous damper system in reducing structural wind-induced vibration responses was fully approved.Some suggestions of analysis and design about super-tall building with cantilever-toggle-brace viscous damper system under wind excitations were proposed.