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K. Ikago¹, M. Ikenaga², K. Kakemoto² and N. Inoue³

¹International Research Institute of Disaster Science, Tohoku University, Sendai, Japan
²Graduate School of Engineering, Tohoku University, Sendai, Japan
³Tohoku University, Sendai Japan

doi:10.4203/ccp.102.38

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K. Ikago, M. Ikenaga, K. Kakemoto, N. Inoue, "Optimum Base-Isolation System Control using Force Restricted Viscous Mass Dampers", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 38, 2013. doi:10.4203/ccp.102.38

Keywords: apparent mass, ball-screw mechanism, force restriction, buffer spring,.

Summary

As a result of recent development of an apparent mass damper in which the actual mass of a cylindrical flywheel can be amplified several thousand times by a ball screw mechanism, seismic control systems using an apparent mass damper are being actively investigated in Japan. The authors have already succeeded at putting an apparent mass damper system, referred to as a tuned viscous mass damper seismic control system, into practical use.

Although researchers have attempted to apply the apparent mass damper to baseisolation, they were confronted by large floor response accelerations induced by the large mass and the finite stiffness of the damper supporting element. Against this backdrop, a damper force restriction mechanism and a buffer spring are proposed to improve floor accelerations in a base-isolated building containing the apparent mass damper.

The objective of this paper is to present a closed form solution of an optimum parameter that is useful to design an appropriate maximum friction force for the force restriction mechanism in the proposed damper.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 102 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: Paper 38 Optimum Base-Isolation System Control using Force Restricted Viscous Mass Dampers K. Ikago¹, M. Ikenaga², K. Kakemoto² and N. Inoue³ ¹International Research Institute of Disaster Science, Tohoku University, Sendai, Japan ²Graduate School of Engineering, Tohoku University, Sendai, Japan ³Tohoku University, Sendai Japan doi:10.4203/ccp.102.38 purchase the full-text of this paper Full Bibliographic Reference for this paper K. Ikago, M. Ikenaga, K. Kakemoto, N. Inoue, "Optimum Base-Isolation System Control using Force Restricted Viscous Mass Dampers", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 38, 2013. doi:10.4203/ccp.102.38 Keywords: apparent mass, ball-screw mechanism, force restriction, buffer spring,. Summary As a result of recent development of an apparent mass damper in which the actual mass of a cylindrical flywheel can be amplified several thousand times by a ball screw mechanism, seismic control systems using an apparent mass damper are being actively investigated in Japan. The authors have already succeeded at putting an apparent mass damper system, referred to as a tuned viscous mass damper seismic control system, into practical use. Although researchers have attempted to apply the apparent mass damper to baseisolation, they were confronted by large floor response accelerations induced by the large mass and the finite stiffness of the damper supporting element. Against this backdrop, a damper force restriction mechanism and a buffer spring are proposed to improve floor accelerations in a base-isolated building containing the apparent mass damper. The objective of this paper is to present a closed form solution of an optimum parameter that is useful to design an appropriate maximum friction force for the force restriction mechanism in the proposed damper. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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