Abstract
In order to control vibration on a structure having two degrees of freedom system of swaying and twisting vibrations during harmonic ground shaking, two kinds of tuned system damper are installed on the structure. In this paper, one method is proposed to determine approximate optimum dynamic parameters of these two dampers (optimum frequency ratio, mass ratio of a damper to that of the structure and optimum damping constant). A five dimensional nonlinear simultaneous equation which satisfy conditions minimizing response of acceleration of two corners of structure was deduced. This equation was resolved by using iterative procedure by Newton's method and five optimum values of dynamic parameters were obtained.
