Study on the effect of existence of frequency dependency to damper force of base-isolated structure

Yoko Sagami, Norio Hori, Kohju Ikago, Norio Inoue

    Research output: Contribution to journalArticlepeer-review

    Abstract

    It is well known that pseudo-velocity under-estimates the seismic response velocity if a long period structure is subjected to a ground motion with high frequency components. Whereas a velocity-dependent damper such as an oil-damper is affected by this effect, frequency dependency of the damper can be eliminated by generating the damping force relative to displacement by using a semi-active damper. In this paper, a displacement dependent regulator for the semi-active damper is modeled by complex stiffness and the comparisons of the seismic responses of the base-isolation systems with the velocity- and displacement-dependent dampers illustrate the effectiveness of the displacement-dependent damper.

    Original languageEnglish
    Pages (from-to)529-536
    Number of pages8
    JournalJournal of Structural and Construction Engineering
    Volume77
    Issue number674
    DOIs
    Publication statusPublished - 2012 Apr

    Keywords

    • Baseisolation
    • Complex stiffness
    • Displacement control design
    • Frequency response function
    • Semi- active damper

    ASJC Scopus subject areas

    • Architecture
    • Building and Construction

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