| Project/Area Number |
07455229
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Building structures/materials
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| Research Institution | Meiji University |
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Principal Investigator |
KOH Tadaki Meiji University, Dept.of Science and Technology, Professor, 理工学部, 教授 (10061904)
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| Co-Investigator(Kenkyū-buntansha) |
SHIMODA Hirokazu Meiji University, Dept.of Science and Technology, Assistant Professor, 理工学部, 助教授 (10130816)
NOGUCHI Hiroyuki Meiji University, Dept.of Science and Technology, Assistant Professor, 理工学部, 助教授 (40062012)
SHIMOSAKA Haruo Meiji University, Dept.of Science and Technology, Professor, 理工学部, 教授 (10139462)
OOMATA Kenichiro Meiji University, Dept.of Science and Technology, Professor, 理工学部, 教授 (10061954)
KANOH Hideaki Meiji University, Dept.of Science and Technology, Professor, 理工学部, 教授 (00017914)
小泉 忠由 明治大学, 理工学部, 助教授 (90016527)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥7,300,000 (Direct Cost: ¥7,300,000)
Fiscal Year 1996: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1995: ¥4,600,000 (Direct Cost: ¥4,600,000)
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| Keywords | Vibration control / Seismic isolation / Earthquake-proof design / Damper / Optimal control / Wind-proof design / Seismic response / Vibration testing |
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| Research Abstract |
(1) The optimal control conditions of an active mass damper and an actuator using jet propulsion when they are used to reduce the sway motion of a high-rise structure, induced by a strong carthquake, were discussed analytically and experimentally. It was confirmed that these methods are effective for suppressing the seismic responses of a high-rise structure even in the case of the Southern Hyogo-prefecture Earthquake (1995).
(2) The 1/3 scale models of one and two-story timber structures with various floor rigidities were designed and produced, and the vibration characteristics of the structures were investigated analytically and experimentally. The influences of the horizontal rigidity of the floor on the vibration chracteristics of the timber structures were revealed through these investigations.
(3) New types of passive and hybrid dampers were developed. Passive ones are clastoplastic dampers utilizing plastic bending of V-shaped plates, continuous plastic bending of thin metal rods and plastic torsion of a metal rod or plate. These elastoplastic dampers have high fatigue life and yield damping even for a small displacement. Hybrid ones are ball screw type dampers consisting of a ball screw, an aluminium disk, rare-earth magnets and a piezoelectric actuator or electromagnets. The effects of vibration suppression of the hybrid dampers were substantiated analytically and experimentally.
(4) A two-dimensional isolation table using circular are beams and a magnetic damper was developed. The frequency and seismic responses of the isolation table were measured using a two-dimensional shaking table, and the effects of vibration isolation were confirmed.
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