Simplified Method to Predict the Dynamic Characteristics Decrement of Viscoelastic Damper under Long-Duration Random Vibration

Abstract

Research interest in viscoelastic (VE) dampers as passive control device for high-rise buildings has been increasing due to the effectiveness of such dampers in dissipating not only the seismic vibration but also of the wind-induced vibrations.Evaluating the dynamic characteristics of VE dampers requires computationally-demanding analysis due to the complexity of the VE material properties.There has been proposed simplified method to predict the dynamic characteristics of VE dampers, but it was only applied and verified for harmonic loadings.Its accuracy for random loadings must be investigated since actual wind response of viscoelastically-damped high-rise building is random.In this paper, the authors propose a simplified method to predict the dynamic characteristics of VE dampers under long-duration random excitation such as wind.