| Project/Area Number |
26420471
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Sojo University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 免震支承 / 磁石 / 復元力 / 転がり / すべり / ころがり / プレート / 鋼球 / 非磁性体 / 磁気回路 / 摩擦力 |
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| Outline of Final Research Achievements |
Prototypes of the seismic isolator which uses magnetic force generating between magnets as restoring force were made in this study. In the isolator, a magnetic circuit with magnets as a magnetomotive force part is formed inside the isolator, and a magnetic restoring force is generated efficiently.
By slow reciprocating loading tests, it was confirmed that the magnetic restoring force of the isolator is proportional to the displacement in small displacement, is substantially constant in medium displacement, and decreases monotonously in large displacement. By free vibration tests, it was confirmed that natural period of the isolator monotonically increases as the amplitude increases. For example, if the amplitudes are larger than the small displacement, the natural period will be approximately doubled when the amplitude is about 4 times. In addition, it was confirmed that frictional damping and viscous damping, which are effective for reducing the amplitude, respectively occur.
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