Controller Design for Earthquake Excitations Using Smart Base-Isolated Structure

Traditional rigid structure buildings can result in higher floor accelerations and considerable inter-floor variations, jeopardizing their safety. Using isolation systems reduces structures' lateral movement, lowering floor accelerations and slippage. In recent years, the base-isolation function has been maintained by utilizing an isolation system and active control devices. This work proposes using a discrete proportional-integral-derivative controller to manage a nonlinear base-isolated structure actively. The proportional-integral-derivative (PID) controller is widely utilized in various control applications due to its user-friendly interface and effective performance. The study looked at the control response of a nonlinear base-isolation system of linear elastomeric and nonlinear friction pendulum bearings under the effect of near-fault seismic excitation. Numerical models simulate the behaviour of a reference structure with nonlinear base isolation. The effectiveness of the proposed controller is assessed using a variety of measures. The suggested control method efficiently mitigates base drift. It increases the responsiveness of the superstructure in the face of a sequence of near-fault earthquakes by applying active control force to the structure of base-isolated.