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TECHNICAL PAPERS

Motion Analysis of Pendulum-Type Isolation Systems During Earthquakes: Dynamic Test and Response Analysis on a Three Story Steel Frame Model Supported by Four Friction Pendulum Bearings

[+] Author and Article Information
Shigeki Okamura

Graduate School of Tokyo Denki University, 2-2 Kanda-Nisiki-cho, Chiyoda-ku, Tokyo 101-8457, Japan

Satoshi Fujita

Tokyo Denki University, 2-2 Kanda-Nisiki-cho, Chiyoda-ku, Tokyo 101-8457, Japan

Masayoshi Ikenaga

Oiles Corporation, Damping & Isolation Company, 1000 Hakari-cho, Ashikaga-shi, Tochigi 326-0327, Japan

J. Pressure Vessel Technol 126(1), 34-45 (Feb 26, 2004) (12 pages) doi:10.1115/1.1636789 History: Received November 08, 2002; Revised June 26, 2003; Online February 26, 2004
Copyright © 2004 by ASME
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References

Okamura, S., and Fujita, S., 2000, “Study on Motion Analysis of Pendulum Isolation Systems During Earthquakes,” PVP Conference.

Figures

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Friction pendulum bering system
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The hysteresis loop: (a) coated-type; and (b) non-coated-type.
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Scale of steel frame structure model
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The laser displacement gage
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Time histories of normal condition
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Difference of laser displacement gage (normal condition)
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Time histories of unbalanced load condition
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Difference of laser displacement gage (unbalanced load condition)
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Time histories of unbalanced friction coefficient
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Difference of laser displacement gage and rotational angle (unbalanced friction coefficient condition)
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Maximum response of the excitation test
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Maximum rotational angle
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Analytical model: (a) the frame slab model; and (b) the rigid body model.
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Algorithm for phase change
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Algorithm for phase change
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Time history input wave El Centro (x,y direction 50 [kine](0.50[m/s]), z direction 25[kine](0.25[m/s]): (a) unbalanced load condition; and (b) unbalanced friction coefficient condition.

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