The application of active multiple tuned mass dampers (AMTMD) for suppressing
translational and torsional responses is addressed for a simplified two-degree of
freedom structure, able to represent the dynamic characteristics of general
asymmetric structures subject to ground motions. By employing the developed
optimum parameter and effectiveness criteria of the AMTMD, the influences of
the normalized eccentricity ratio and the torsional-to-translational frequency
ratio of asymmetric structures on the optimum parameters and effectiveness of
the AMTMD are investigated in detail. For comparison purposes, the results of a
single active tuned mass damper also are taken into consideration