Braz-César, ManuelBarros, Rui2018-05-022018-05-022015Braz-César, M.T.; Barros, Rui (2015). Vibration control of asymmetric structures using MR dampers. In 13th Conference on DYNAMICAL SYSTEMS Theory and Applications - DSTA 2015. Lodz, Poland. ISBN 978-83-7283-705-9978-83-7283-705-9http://hdl.handle.net/10198/17535This paper is devoted to study the effectiveness of semi-active control systems with MR dampers to reduce lateral-torsional responses of irregular structures, in particular plan asymmetric building structures. Basic concepts and the analytical formulation of asymmetric structural systems are initially provided. Then, several numerical simulations comprising a two-story, one bay building structure excited by an earthquake ground motion will be used to demonstrate the effectiveness of a non-collocated passive and semi-active control systems in mitigating seismic-induced vibrations. The passive configurations are accomplished using the MR damper as passive energy dissipation devices while the semi-active configurations make use of the controllable nature of this type of actuators. The numerical results achieved with uncontrolled and passive configurations are compared with those of several semi-active controllers to evaluate the performance of each control scheme in reducing the coupled lateral-torsional response of the plan asymmetric structure due to seismic loading.engSemi-active controlAsymmetric structuresMR dampersStructural dynamicsSeismic responseconference object