Optimum base-isolation system control using force restricted viscous mass dampers

Koju Ikago, Masahiro Ikenaga, K. Kakemoto, N. Inoue

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of the 14th International Conference on Civil, Structural and Environmental Engineering Computing, CC 2013
PublisherCivil-Comp Press
Volume102
ISBN (Print)9781905088577
Publication statusPublished - 2013 Jan 1
Event14th International Conference on Civil, Structural and Environmental Engineering Computing, CC 2013 - Cagliari, Sardinia, Italy
Duration: 2013 Sep 32013 Sep 6

Other

Other14th International Conference on Civil, Structural and Environmental Engineering Computing, CC 2013
CountryItaly
CityCagliari, Sardinia
Period13/9/313/9/6

Keywords

  • Apparent mass
  • Ball-screw mechanism
  • Buffer spring
  • Force restriction
  • H-infinity control
  • Linear hysteretic damping
  • Rate-independent damping

ASJC Scopus subject areas

  • Environmental Engineering
  • Civil and Structural Engineering
  • Computational Theory and Mathematics
  • Artificial Intelligence

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