REDUCCIóN DE VIBRACIONES EN UN EDIFICIO MEDIANTE LA UTILIZACIóN DE AMORTIGUADORES MAGNETOREOLóGICOS

one of the most promising device of semi-active control is the magnetorheological (mr) damper, which consists of a hydraulic cylinder, magnetic coils and a stimulate fluid called magnetorheological fluid, whose main feature is its ability to vary from a linear viscous liquid free-flowing state to a semi-solid state in just milliseconds when exposed to a magnetic field. this peculiarity makes the mr dampers an ideal tool for the control of structural systems, because with them it's possible manage damping forces in a simple, fast and secure way to a relatively low cost. this paper analyzes the structural response of a two-story building controlled by a pair of mr dampers operated by a linear quadratic regulator (lqr) associated with a algorithm developed to choose command signal of the clipped optimal controller. the results showed reductions higher than 49% and 76% of peak response and rms values of response, respectively.