Viscous-Tuned Hybrid Structural Vibration Mitigation System: Wind-Induced Response Analyses Method and Case Study

Abstract

The wind-induced vibrations of super tall buildings become excessive due to strong wind loads, super building height and high flexibility. Tuned mass dampers (TMDs) and viscous dampers have been widely used to control vibrations for actual super tall buildings for decades. Sometimes people tend to use TMDs and viscous dampers simultaneously, for example the space is not sufficient for TMDs. An innovative supplemental damping system which is composed of both viscous damper and TMD, namely viscous-tuned damper system (VTD), is proposed to control the wind-induced vibrations of tall buildings. The governing equations are generated for the motion of both the primary structure and the VTD and solved to anticipate the dynamic response of the VTD-structure system. A two story frame is studied to verify the design method. The wind-induced vibration mitigation efficiency of super tall buildings equipped with both viscous dampers and tuned mass dampers (VTD) are investigated in this study. The results show that the VTD system has sound vibration mitigation capacity. Considering the practical engineering situation, the VTD system is a competitive option for wind-induced vibration control of super tall buildings.