Dynamic responses of a 492-m-high tall building with active tuned mass damping system during a typhoon

This paper presents observations on the dynamic properties and wind-induced response characteristics of a 492-m-high building installed with an active tuned mass damping (ATMD) system during a typhoon. Damping ratios, natural frequencies, and wind-induced vibrations of the super-tall building with/without the operation of the ATMD system are investigated. Field measurement results show that the ATMD system functioned efficiently for the suppression of the wind-induced vibrations of this super-tall building, and the building's acceleration responses were well confined within the range stipulated in the International Standards Organization for serviceability concerns. A modified time-weighted random decrement operator is proposed for estimation of damping ratio, which is able to provide more reasonable estimations than unmodified form under nonstationary conditions. In addition, extreme responses of this building under the typhoon are studied using the crossing method and the generalized extreme value model. The main objective of this study is to investigate the effectiveness of the ATMD system and the performance of the actively controlled high-rise structure under typhoon condition to assess the benefits gained from the application of the vibration control technique. Copyright © 2013 John Wiley & Sons, Ltd.