Development of a displacement-dependent damper for base isolated structures

M. Ikenaga, K. Ikago, N. Inoue

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

Abstract

In Japan, a long-period earthquake or an extreme seismic event that exceed the assumed level of structural design codes are concerned to occur in the future. This paper presents a new seismic control method which effectively reduces the response displacement of the base-isolation layer of a base-isolated building. A displacementdependent damping model is effective in the direct reduction of the displacement, because the damper force generated is relative to the displacement, while that of a conventional viscous damper is relative to the velocity. In this paper, we propose the variable-oval-control rule for a semi-active damper, a magneto-rheological (MR) damper, to simulate a displacement-dependent damping model. Time history analyses are performed to compare the experimental results and to verify the effectiveness of the present control rule in seismic response reduction. Shaking table tests are conducted to verify the accuracy of the present control rule and characteristics of the MR damper.

Original languageEnglish
Title of host publicationProceedings of the 10th International Conference on Computational Structures Technology, CST 2010
PublisherCivil-Comp Press
Volume93
ISBN (Print)9781905088386
Publication statusPublished - 2010 Jan 1
Event10th International Conference on Computational Structures Technology, CST 2010 - Valencia, Spain
Duration: 2010 Sep 142010 Sep 17

Other

Other10th International Conference on Computational Structures Technology, CST 2010
CountrySpain
CityValencia
Period10/9/1410/9/17

Keywords

  • Base isolation
  • Magneto-rheological damper
  • Numerical analysis
  • Shaking table test
  • Variable-oval-control rule

ASJC Scopus subject areas

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

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