Frequency‐independent hysteretic dampers for mitigating wind‐induced vibrations of tall buildings

摘要

Mitigation of wind-induced vibrations in tall buildings has been taken seriously for decades for the safety of the load bearing members, nonstructural elements, and the building envelope, as well as for the comfort of the occupants. Among various technologies to mitigate these vibrations, tuned mass dampers with various improvisations, active or semiactive controls, and viscous dampers are proposed and used extensively. Although these technologies are dependent on the frequency of vibration, research on frequency-independent hysteretic dampers for mitigating wind-induced vibrations are quite limited. This paper evaluates the efficiency of hysteretic dampers in suppressing wind-induced vibrations. Inelastic dynamic wind-load analyses are performed with two regular three-dimensional buildings and one 76-story benchmark two-dimensional building. It is found that hysteretic dampers perform exceedingly better than the state-of-the-art control systems because they can absorb energy near the natural frequencies of the parent structure, as well as within the frequency bandwidth of windstorms.