Design and Optimization of Viscous Damping Outrigger Vibration Reduction for Ultra-high Structures

Super tall buildings are wind sensitive structures. It has been a hot direction to study how to improve their wind-induced comfort. Viscous dampers are widely used in vibration reduction because of their high energy dissipation characteristics. In this paper, an optimal layout method of viscous damping outriggers is proposed to improve the layout efficiency of damping outriggers in mega frame core tube structure. Based on the energy consumption ranking of viscous dampers and the low coupling premise of outrigger area, the damping efficiency of each outrigger area position can be obtained by analyzing the fully distributed damping structure only once. Then, according to the contribution value of additional damping ratio of damping outriggers in each area, the optimal layout number and position scheme of damping boom are selected by comparing the target additional damping ratio. Through a simplified model, the rationality of the hypothesis and the efficiency and intuitiveness of the method are verified; Finally, the method is applied to a practical engineering case.