VIBRATION CONTROL PERFORMANCE INDEX OF MASS DAMPER SYSTEM BASED ON ABSORBED ENERGY DURING STRONG WIND

Abstract

This paper describes equivalent damping ratio (EDR) of a mass damper system, based on the absorbed energy by the mass damper during strong wind. The proposed EDR is evaluated from the ratio of absorbed energy and the building's response velocity. By using the EDR, we can simply express the vibration control performance of the mass damper system, not only at the design stage but also afterthe completion of the building. The EDR is easily obtained from the response time histories of the building and the mass damper which are recorded during strong winds. We have studied the effectof some parametersof mass dampers to the EDR, and demonstrated the applicability of the EDR using the response records of the two actual biildings in which the mass damper systems are installed.