某超高层结构采用速度相关型阻尼器的风振控制研究

Vibration reduction of a 288m super high-rise structure with velocity-depended dampers is studied in this paper. The fluctuating wind time-series of the structural Y-direction are simulated by improved AR model. According to the natural characteristics of the super-high structure, six kinds of damping control plans with viscous dampers or lead-viscoelastic dampers are proposed. Wind load time-series with 10-year frequency are selected as structural dynamic input. The structural dynamic responses in different control plans are studied and its damping effects are analyzed comparatively. The results show that the control plans can dissipate energy imported by wind and reduce structural dynamic responses effectively. The maximum roof displacement and acceleration responses can be respectively reduced by 33% and 41%. So, the control plans are feasible and effective to control wind-induced vibration, improve safety and comfort of the structure. Several suggestions of wind resistance of super high-rise building with dampers are presented at last.