Optimal Critical-Mode Control of Building under Seismic Load

Abstract

An analysis of optimal open-loop critical-mode control for tall buildings excited by earthquakes is presented. It is shown that both the active mass damper and the active tendon system are effective in reducing the building response. Furthermore, the optimal critical-mode control is likely to be as effective as the optimal global control, since the building response under earthquake excitations is usually dominated by a few lowest modes.