| Project/Area Number |
10450205
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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 | KYOTO UNIVERSITY |
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Principal Investigator |
NONAKA Taijiro Disaster Prevention Research Institute, Kyoto University, Prof, 防災研究所, 教授 (60027224)
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| Co-Investigator(Kenkyū-buntansha) |
UETANI Koji Eng. Dept., Kyoto University, Prof., 防災研究所, 教授 (40026349)
TUBOTA Haruji Kajima Corporation, Department Chief, 技術研究所, 専門研究部員
TAKABATAKE Hideo Eng. Dept., Kanazawa Institute of Technology, Prof., 工学部, 教授 (20064462)
NATANI Seiichiro Eng. Dept., Osaka City Univ., Research associate, 工学部, 助手 (20047369)
NAKAYAMAI Akio Eng. Dept., Fukuyama Univ., Prof., 工学部, 教授 (70026235)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 1999: ¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 1998: ¥8,800,000 (Direct Cost: ¥8,800,000)
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| Keywords | Aseismic design / Shock analysis / Brittle fracture / Earthquake damage / Wave-propagation analysis / Dynamic design / Hyogoken-nanbu earthquake / 衝撃 / 地震 / パルス / 破壊 / 損傷 / 構造物 |
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| Research Abstract |
In order to investigate the possibility that some of structural damages due to the Hyogoken-nanbu Earthquake were caused by impulsive action of the earthquake, a cooperative research group was formed in Architectural Institute of Japan, and have derived to date such results as follows :
1.Significant structural damage such as steel fracture experienced at Ashiyahama residential complex cannot be caused by such conventional seismic waves as adopted in ordinary structural design, but by the seismic save which would have occurred at the site.
2.Pertinent earthquake resistance cannot be maintained through simultaneous occurrence of plastic hinges in an identical story. The number of the occurrence of plastic hinges should be limed for structural reliability against earthquakes.
3.The post-cracking behavior of a structural frame depends not only on the circumferential condition near the crack but also on the over-all configuration and loading condition of the frame.
4.Such a high strain-rate and plastic pre-strain as occur in impulsive loading reduce fracture toughness of a steel member significantly.
5.There is a possibility that past earthquake records do not contain high-frequency contents to sufficient accuracy.
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