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1Experimental Verification of Torsional Response Control of Asymmetric Buildings Using MR Dampers
| Citations: | 2 - 0 self |
BibTeX
@MISC{Yoshida_1experimentalverification,
author = {Osamu Yoshida and Shirley J. Dyke and Luca M. Giacosa and Kevin Z. Truman},
title = {1Experimental Verification of Torsional Response Control of Asymmetric Buildings Using MR Dampers},
year = {}
}
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Abstract
This paper proposes a semiactive control system to reduce the coupled lateral and torsional motions in asymmetric buildings subjected to horizontal seismic excitations. Magnetorheo-logical (MR) dampers are applied as semiactive control devices and the control input deter-mination is based on a clipped-optimal control algorithm which uses absolute acceleration feedback. The performance of this method is studied experimentally using a 2-story building model with an asymmetric stiffness distribution. An automated system identification meth-odology is implemented to develop a control-oriented model which has the natural frequen-cies observed in the experimental system. The parameters for the MR damper model are identified using experimental data to develop an integrated model of the structure and MR dampers. To demonstrate the performance of this control system on the experimental struc-ture, a shake table is used to reproduce an El Centro 1940 N-S earthquake as well as a ran-dom white noise excitation. The responses for the proposed control system are compared to those of passive control cases in which a constant voltage is applied to the MR damper. KEY WORDS: magnetorheological (MR) damper, semi-active, clipped-optimal, torsional response, irregular building 1.
Keyphrases
torsional response control asymmetric building using mr damper mr damper control system clipped-optimal control algorithm experimental system asymmetric stiffness distribution absolute acceleration feedback torsional motion experimental struc-ture asymmetric building seismic excitation ran-dom white noise excitation irregular building n-s earthquake el centro control input deter-mination semiactive control system semiactive control device passive control case 2-story building model natural frequen-cies mr damper model constant voltage torsional response shake table control-oriented model key word integrated model experimental data automated system identification meth-odology
