Nowadays, thanks to the developing technology and design of advanced materials, structures in current engineering practice are designed higher and flexible. For this reason, it has become important to protect the structures against dynamic loads such as earthquakes and wind. One solution to reduce the seismic response of structures is the use of structural control systems. The control systems applied in the structures are generally divided into Passive Control and Active Control Systems. In this study, passive and active control system methods of multi degree of five-storey reinforced concrete building against earthquakes were compared. Viscous Damper for passive control, LQR (Linear Quadratic Regulator) optimal control method and H∞ robust control methods were selected in the active control system. Earthquake characteristics such as magnitude and intensity of the earthquake and the frequency affect the optimization sensivity of the control system. In this study, the effectiveness of the building control algorithms are tested by using Gebze-Tubitak observation station records of the Kocaeli earthquake of the 17 August 1999. For the control of multi degree of freedom structures, it was analyzed in different cases, which were simulated in virtual test sets, using Matlab macro codes and analysis program SAP2000N package. As a result of the study, floor displacements, velocity and acceleration time responses were presented and discussed for both uncontrolled and controlled structure. It is seen that the active controlled system on the structure is more effective in reducing floor responses than passive control.

KEYWORDS: Structural Control, Passive Control, Active Control, Robust Control, Viscous Damper, Simulation