Application of MR damper to base-isolated structures

Norio Iwata, Katsuhiko Hata, Hiroshi Sodeyama, Katuaki Sunakoda, Hideo Fujitani, Ken Hiwatashi, Yoichi Shiozaki, Satsuva Soda

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

    7 Citations (Scopus)

    Abstract

    This paper presents a comprehensive study on the application of the MR damper to base-isolated building structures. It first proposes a simple semi-active control algorithm for a base-isolated structure with an MR damper. The algorithm, in which the MR damper's hysteresis shape is controlled, aims to reduce the isolator's displacement without increasing the acceleration responses of the upper structures. The second part of this paper covers the properties of an MR fluid and an MR damper developed for a base-isolated model structure. The damper has a nominal capacity of 40kN, which can be adjusted in accordance with the applied magnetic fields. In the test, the damper is subjected to cyclic sinusoidal displacements with different amplitudes, velocities and magnetic field intensities. The last part describes shaking table tests carried out using the MR damper and the base-isolated model structure. It is confirmed that the proposed semi-active control method is effective in reducing the isolator's displacement without increasing the acceleration responses.

    Original languageEnglish
    Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
    EditorsS.C. Liu, D.J. Pines
    Pages352-362
    Number of pages11
    Volume4696
    DOIs
    Publication statusPublished - 2002
    EventSmart Structures and Materials 2002: Smart Systems for Bridges, Structures, and Highways - San Diego, CA, United States
    Duration: 2002 Mar 182002 Mar 20

    Other

    OtherSmart Structures and Materials 2002: Smart Systems for Bridges, Structures, and Highways
    CountryUnited States
    CitySan Diego, CA
    Period02/3/1802/3/20

    Keywords

    • Base Isolation
    • Magneto-rheological fluid
    • MR Damper
    • Semi-Active Control
    • Viscous Damping

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Condensed Matter Physics

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  • Cite this

    Iwata, N., Hata, K., Sodeyama, H., Sunakoda, K., Fujitani, H., Hiwatashi, K., Shiozaki, Y., & Soda, S. (2002). Application of MR damper to base-isolated structures. In S. C. Liu, & D. J. Pines (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4696, pp. 352-362) https://doi.org/10.1117/12.472572