INTEGRATED PASSIVE ACTIVE VIBRATION ABSORBER FOR MULTISTORY BUILDINGS/

In this paper, a passive isolator, an active vibration absorber, and a n integrated passive/active (hybrid) control are studied for their eff ectiveness in reducing structural vibration under seismic excitations. For the passive isolator, a laminated rubber bearing base isolator, w hich has been studied and used extensively by researchers and seismic designers, is studied. An active vibration absorber concept, which can provide guaranteed closed-loop stability with minimum knowledge of th e controlled system, is used to reduce the passive isolator displaceme nt and to suppress vibration. A three-story building model is used for the numerical simulation. The performance of an active vibration abso rber and a hybrid vibration controller in reducing peak structural res ponses is compared with the passively isolated structural response und er the NOOW component of the Fl Centro 1940 and N90W component of the Mexico City 1985 earthquake excitation records.