PERFORMANCE EVALUATION OF VISCOELASTIC AND FRICTION PASSIVE DAMPING SYSTEMS IN VIBRATION CONTROL OF TALL BUILDINGS

This paper provides a comparison of the maximum inter-story drifts and tip acceleration of both a 16 and 30 stories building each with different structural systems; hybrid R.C moment frame with shear walls and hybrid steel frame with shear walls and X bracing which are equipped by passive dampers. Each of the building models were analyzed as fully non-linear structures for variety of dampers placements and subjected to a total of 4 different earthquake excitations. Three-dimensional (3D) finite-element models have been developed in the (FE) code LUSAS to predict the effects of passive damping on the vibrating structures. The manuscript tries to presents a rational comparison for determining dynamic response of seismic-excited high-rise buildings installed with friction and viscoelastic dampers in the cut outs of shear walls in order to capture their advantages in creating efficient damping systems. The results have shown that it is possible to achieve seismic mitigation, under all earthquake excitations, for all the structures considered in this study, by using appropriate damper types suitably located within the structure.