After the Hanshin-Awaji Earthquake Disaster, the number of earthquake isolated buildings is increasing. Most of the base isolated buildings or structures are built on laminated rubber bearings in order to give them certain natural periods. This situation, however, also encourages structural engineers to research and develop nonrubber-type isolation systems such as linear motion bearing isolators and friction pendulum systems. It is considered that the nonrubber-type isolation systems can be applied to important industrial facilities, such as LNG tanks, boiler facilities and so on to refine their seismic reliabilities. In the device of the nonrubber-type isolation systems, the device which applied the sliding is especially noticed. However, when using nonrubber-type isolation systems with sliding in the open air circumstances, long term durability of the systems must be taken into account and it may be very difficult to maintain the friction coefficient of the system. In this study, the dynamic motion analysis and the experimental tests on the isolated structure mounted on four Friction Pendulum Bearing (FPB) Systems were carried out to investigate the performance of isolation due to the rotational motion which might be induced by the friction force difference in FPB system.
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e-mail: shigeokamu@aol.com
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February 2004
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
Shigeki Okamura,
e-mail: shigeokamu@aol.com
Shigeki Okamura
Graduate School of Tokyo Denki University, 2-2 Kanda-Nisiki-cho, Chiyoda-ku, Tokyo 101-8457, Japan
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Satoshi Fujita,
e-mail: sfujita@cck.dendai.ac.jp
Satoshi Fujita
Tokyo Denki University, 2-2 Kanda-Nisiki-cho, Chiyoda-ku, Tokyo 101-8457, Japan
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Masayoshi Ikenaga
e-mail: aramizu@oiles.co.jp
Masayoshi Ikenaga
Oiles Corporation, Damping & Isolation Company, 1000 Hakari-cho, Ashikaga-shi, Tochigi 326-0327, Japan
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Shigeki Okamura
Graduate School of Tokyo Denki University, 2-2 Kanda-Nisiki-cho, Chiyoda-ku, Tokyo 101-8457, Japan
e-mail: shigeokamu@aol.com
Satoshi Fujita
Tokyo Denki University, 2-2 Kanda-Nisiki-cho, Chiyoda-ku, Tokyo 101-8457, Japan
e-mail: sfujita@cck.dendai.ac.jp
Masayoshi Ikenaga
Oiles Corporation, Damping & Isolation Company, 1000 Hakari-cho, Ashikaga-shi, Tochigi 326-0327, Japan
e-mail: aramizu@oiles.co.jp
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division November 8, 2002; revision received June 26, 2003. Associate Editor: G. C. Slagis.
J. Pressure Vessel Technol. Feb 2004, 126(1): 34-45 (12 pages)
Published Online: February 26, 2004
Article history
Received:
November 8, 2002
Revised:
June 26, 2003
Online:
February 26, 2004
Citation
Okamura, S., Fujita, S., and Ikenaga, M. (February 26, 2004). "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 ." ASME. J. Pressure Vessel Technol. February 2004; 126(1): 34–45. https://doi.org/10.1115/1.1636789
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