Dynamic testing of a full-scale hydraulic inerter-damper for the seismic protection of civil structures

Shigeki Nakaminami, Hidenori Kida, Kohju Ikago, Norio Inoue

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

    9 Citations (Scopus)

    Abstract

    This paper proposes a hydraulic inerter–damper inspired by the idea of the “mass pump” developed by Kawamata et al. [1973]. A mass pump produces apparent mass that is approximately two thousand times larger than the physical mass of the fluid that can fill a thin tube. This device is one of the implementations of the concept of an inerter defined by Smith [2002]. The most significant features of an inerter are that it produces inertial resistive force that is proportional to the relative acceleration between two nodes, and its apparent mass is substantially larger than its physical mass. Kawamata and Onuma [1986] further developed a tuned mass damper–like system using the apparent mass produced by the inerter–device. The basic concept of a fluid inerter invented by Tuluie [2013] is the same as that of a mass pump. Wang et al. [2011] developed a hydraulic inerter to obtain an amplified apparent mass by combining a flywheel and a hydraulic gerotor. The maximum estimated inertance (apparent mass) of the device in the experiment was 687 kg. The hydraulic inerter–damper proposed in this paper combines the mechanism used in the hydraulic inerter developed by Wang et al. [2011] and a sub-piston with orifices, generating inertial resistive and fluid viscous damping forces, respectively. Dynamic testing using a full-scale hydraulic inerter-damper confirmed that the mass of the flywheel attached to the gerotor led to an apparent mass of 12 014 metric tons.

    Original languageEnglish
    Title of host publicationProceedings of the 7th International Conference on Advances in Experimental Structural Engineering, AESE 2017
    EditorsMarco Furinghetti, Davide Bolognini, Alberto Pavese
    PublisherEUCENTRE
    Pages41-54
    Number of pages14
    ISBN (Electronic)9788885701021
    DOIs
    Publication statusPublished - 2017 Jan 1
    Event7th International Conference on Advances in Experimental Structural Engineering, AESE 2017 - Pavia, Italy
    Duration: 2017 Sep 62017 Sep 8

    Publication series

    NameInternational Conference on Advances in Experimental Structural Engineering
    Volume2017-September
    ISSN (Electronic)2522-2503

    Other

    Other7th International Conference on Advances in Experimental Structural Engineering, AESE 2017
    Country/TerritoryItaly
    CityPavia
    Period17/9/617/9/8

    Keywords

    • Fluid inerter
    • Flywheel
    • Generated rotor
    • Hydraulic inerter
    • Inerter

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Building and Construction

    Fingerprint

    Dive into the research topics of 'Dynamic testing of a full-scale hydraulic inerter-damper for the seismic protection of civil structures'. Together they form a unique fingerprint.

    Cite this