Fuzzy Control of Structures under Earthquake Excitation

MR dampers are a new class of semi -active control devices which have many attractive features and have been widely used instructure control. A strategy based on genetic algorithm (GA) to design fuzzy controller of MR dampers was presented here. This strategy combine theMulti-Objective GA-NSGA-II and fuzzy control technique. NSGA-II was employed to design and optimize the fuzzy rules. A 3-story frame structureequipped with MR dampers on the first floor is investigated. El Centrol earthquake, Kobe earthequake, Hachinohe earthquake and Northridgeearthquake are used to excite the system. The result of the simulation shows, the proposed strategy is more effective than the passive strategy andsimilar to the Clipped-LQR strategy.