000013523 001__ 13523
000013523 005__ 20161114165753.0
000013523 04107 $$aeng
000013523 046__ $$k2011-05-25
000013523 100__ $$aChae, Y.
000013523 24500 $$aMaxwell Nonlinear Slider Model for Seismic Response Prediction of Semi-Active Controlled Magneto-Rheological Dampers

000013523 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013523 260__ $$bNational Technical University of Athens, 2011
000013523 506__ $$arestricted
000013523 520__ $$2eng$$aMagneto-rheological (MR) dampers are a promising device for seismic hazard mitigation of structural systems due to their ability to adaptively vary their damping characteristics using an appropriate control law. A majority of past research has involved small-scale MR dampers. In order to investigate the dynamic behavior of large-scale MR dampers, characterization tests have been conducted on large-scale MR dampers at the Lehigh NEES equipment site. A new MR damper model, called the Maxwell Nonlinear Slider Model (MNS), was developed using the data from these tests. The new MR damper model can independently describe the pre-yield and post-yield behavior of an MR damper, making it easier to identify the model parameters. The new damper model utilizes the Hershel-Bulkley visco-plasticity formulation to describe the post-yield behavior of the damper, and possesses the characteristics of a non-Newtonian fluid, i.e., shear thinning and thickening behavior of MR fluid. The effects of the dynamics of an MR damper associated with variable current input from a semiactive control law is integrated into the model by a nonlinear differential equation describing the eddy current effect and the magnetization behavior of damper materials. The accuracy of the new MR damper model is compared with other existing models, such as the Bouc-Wen and hyperbolic tangent models. Experimental studies are performed involving real-time hybrid simulations of complete structural systems, where MR dampers in the structure are subjected to realistic demands associated with the design basis and maximum considered earthquakes. Comparisons of the measured hysteretic response of the large-scale dampers in the tests with the predicted behavior by the MNS damper model show that the new model is able to achieve a high degree of accuracy compared to existing MR damper models under earthquake loading conditions. The MNS model enables accurate nonlinear time history analysis for the response prediction of structural systems with MR dampers to be performed.

000013523 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013523 653__ $$aMagneto-Rheological (MR) damper, Structural Dynamics, Real-Time Hybrid Simulation, Dynamics of Electromagnetism

000013523 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013523 720__ $$aChae, Y.$$iRicles, J.$$iSause, R.
000013523 8560_ $$ffischerc@itam.cas.cz
000013523 8564_ $$s688581$$uhttps://invenio.itam.cas.cz/record/13523/files/235.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 08 Control of Vibrations in Civil Engineering by Passive Active and Semi-Active Devices.
000013523 962__ $$r13401
000013523 980__ $$aPAPER