Please use this identifier to cite or link to this item: http://repositorio.lnec.pt:8080/jspui/handle/123456789/1006699
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dc.contributor.authorOliveira, F. S. B. F.pt_BR
dc.contributor.authorGil de Morais, P.pt_BR
dc.contributor.authorSuleman, A.pt_BR
dc.date.accessioned2014-12-12T09:36:12Zpt_BR
dc.date.accessioned2017-04-12T09:21:41Z-
dc.date.available2014-12-12T09:36:12Zpt_BR
dc.date.available2017-04-12T09:21:41Z-
dc.date.issued2014-06pt_BR
dc.identifier.urihttps://repositorio.lnec.pt/jspui/handle/123456789/1006699-
dc.description.abstractBase isolation systems have been proposed for reducing the transmission of seismic forces and energy to buildings when subjected to earthquake loads. Passive devices are ofien prescribed to reduce displacements at the isolation levei but in certain circumstances structural interstorey drifis and absolute accelerations can increase. This work explores the use of semi-active devices whose input is obtained from an output nonlinear control law resulting from the transformation of the nonlinear system into a linear one which is then controlled bya proportional controller. Within this nonlinear feedback control strategy the whole system formulation is considered for deriving the control law. A two degree of freedom experimental model representative of a typical base isolated building, currently under development at LNEC, is used as an example to evaluate the ( performance of the proposed strategy when subjected to accelerograms for the Portuguese territory. The results of the experimental characterization of the model components and for a magneto-rheological damper are presented. Numerical simulation results show that the proposed strategy to command the damper in real time can reduce the base relative displacement with better performance at the superstructure leveI (interstorey and accelerations) than the damper working in the passive mode. Although a small incre ase in the base acceleration for one type of seismic action is observed when compared to the original structure, it is always lower than the one resulting with the passive case.pt_BR
dc.language.isoengpt_BR
dc.rightsopenAccesspt_BR
dc.subjectSemi-active controlpt_BR
dc.subjectNonlinear feedback controlpt_BR
dc.subjectMr damperspt_BR
dc.subjectHybrid base isolationpt_BR
dc.subjectSeismic protectionpt_BR
dc.titleSemi-Active Control of Base-isolated Structures Using a Nonlinear Feedback Strategypt_BR
dc.typeconferenceObjectpt_BR
dc.description.pages8pppt_BR
dc.description.commentsEURODYN - 2014 - IX International Conference opn Structural Dynamicspt_BR
dc.identifier.localPortopt_BR
dc.description.sectorCIC/NSEMpt_BR
Appears in Collections:CICTI/NSEM - Comunicações a congressos e artigos de revista

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