Reduction of seismic response of mechanical system is important problem for aseismic design. Some types of base isolation systems are developed and used in actual base of buildings and floors in buildings for reduction of seismic response of mechanincal system. In this paper, a base isolation system utilizing bearing with friction and restoring force of bearing is proposed. Friction bearing consists of two plates having spherical concaves and oval type metal or spherical metal with rubber. First, effectiveness of the base isolation system is examined experimentally. Using artificial time histories, the isolated table is shaken on the shaking table. The maximum value of response is reduced and sum of squares of response is significantly reduced. Power spectrum is significantly reduced in almost of all frequency regions, except for very low frequency region. Next, in order to examine reduction of seismic response of actual mechanical system, a console rack is set on the isolated plate. Seismic response is also significantly reduced. Finally, obtained results of experiment are examined by simulation method. An analytical model considering friction and restoring force is used. From simulation method, effectiveness of the proposed base isolation system is demonstrated.
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ASME 2007 Pressure Vessels and Piping Conference
July 22–26, 2007
San Antonio, Texas, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4286-X
PROCEEDINGS PAPER
Reduction of Seismic Response of Mechanical System by Base Isolation System With Friction Bearing
Shigeru Aoki,
Shigeru Aoki
Tokyo Metropolitan College of Industrial Technology, Tokyo, Japan
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Yuji Nakanishi,
Yuji Nakanishi
Tokyo Metropolitan College of Industrial Technology, Tokyo, Japan
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Kazutoshi Tominaga,
Kazutoshi Tominaga
Tokyo Metropolitan College of Industrial Technology, Tokyo, Japan
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Takeshi Otaka,
Takeshi Otaka
Kagoshima University, Kagoshima, Kagoshima, Japan
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Tadashi Nishimura,
Tadashi Nishimura
Tokyo Metropolitan College of Industrial Technology, Tokyo, Japan
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Mitsuyoshi Inagaki,
Mitsuyoshi Inagaki
Tokyo Metropolitan College of Industrial Technology, Tokyo, Japan
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Mitsuo Kanazawa,
Mitsuo Kanazawa
Kanazawa Manufacturing Company, Ltd., Kyoto, Japan
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Sumio Kawaguchi
Sumio Kawaguchi
Kanazawa Manufacturing Company, Ltd., Kyoto, Japan
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Shigeru Aoki
Tokyo Metropolitan College of Industrial Technology, Tokyo, Japan
Yuji Nakanishi
Tokyo Metropolitan College of Industrial Technology, Tokyo, Japan
Kazutoshi Tominaga
Tokyo Metropolitan College of Industrial Technology, Tokyo, Japan
Takeshi Otaka
Kagoshima University, Kagoshima, Kagoshima, Japan
Tadashi Nishimura
Tokyo Metropolitan College of Industrial Technology, Tokyo, Japan
Mitsuyoshi Inagaki
Tokyo Metropolitan College of Industrial Technology, Tokyo, Japan
Mitsuo Kanazawa
Kanazawa Manufacturing Company, Ltd., Kyoto, Japan
Sumio Kawaguchi
Kanazawa Manufacturing Company, Ltd., Kyoto, Japan
Paper No:
PVP2007-26302, pp. 177-183; 7 pages
Published Online:
August 20, 2009
Citation
Aoki, S, Nakanishi, Y, Tominaga, K, Otaka, T, Nishimura, T, Inagaki, M, Kanazawa, M, & Kawaguchi, S. "Reduction of Seismic Response of Mechanical System by Base Isolation System With Friction Bearing." Proceedings of the ASME 2007 Pressure Vessels and Piping Conference. Volume 8: Seismic Engineering. San Antonio, Texas, USA. July 22–26, 2007. pp. 177-183. ASME. https://doi.org/10.1115/PVP2007-26302
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