Abstract
The maximum displacement at the buildingschr('39') isolated level is an important issue for designing an economical and practical isolation system. Due to various reasons such as uncertainties in the design, changes in estimated seismic characteristics, and changes in design codes, the considered gap size around the existing isolated structures may not be sufficient for having free movement during an earthquake. Therefore, it is necessary to reduce the isolated level displacements by using an efficient method to prevent the possibility of structural pounding. The purpose of this paper is to use a smart control system in the isolated level with the optimized fuzzy control algorithm to reduce based-level displacements by considering different gap sizes around the structure. In this research, the Magnetorheological damper with the optimized fuzzy logic algorithm is used at a based level of isolated structure with high damping isolators. The results show that the control system can improve the superstructurechr('39')s seismic performance and prevent poundings. Also, the dispersion and average of seismic responses of the superstructure in the probability density function of responses are reduced compared to structures without smart control systems.