| Project/Area Number |
05302072
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Natural disaster science
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| Research Institution | Hiroshima Institute of Technology |
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Principal Investigator |
NAKAYAMA Takahiro Hiroshima Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (90087974)
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| Co-Investigator(Kenkyū-buntansha) |
MIRURA Fusanori Yamaguchi Uiversity, Faculty of Engineering, Professor, 工学部, 教授 (60109072)
NAKATA Takashi Hiroshima Uiversity, Faculty of Literature, Associate Professor, 文学部, 助教授 (60089779)
HAYASHI Haruo Kyoto Uiversity, Disaster Prevention Research Institute, Associate Professor, 防災研究所, 助教授 (20164949)
NOJIMA Nobuoto Hiroshima Institute of Technology, Faculty of Engineering, Lecturer, 工学部, 講師 (20222200)
ASANO Teruo Hiroshima Institute of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (10089790)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥8,600,000 (Direct Cost: ¥8,600,000)
Fiscal Year 1994: ¥4,300,000 (Direct Cost: ¥4,300,000)
Fiscal Year 1993: ¥4,300,000 (Direct Cost: ¥4,300,000)
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| Keywords | Geiyo Earthquake / Earthquake Disaster / Damage Records / Sea-bed Fault / Fault Rupture Model / Ground Motion Characteristics / Liquefaction / Building Damage Assessment / 歴史地震 / 地震防災 / 地盤の液状化 |
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| Research Abstract |
In this study, damage to Hiroshima-Kure-Matsuyama region due to the Geiyo earthquake of June 2, 1906 was re-examined from multi-viewpoints of various research fields in a comprehensive manner, aiming at promotion of regional disaster prevention through the inter-disciplinary collaboration.
Firstly, in order to collect materials on the Geiyo earthquake disaster, literature survey and questionnaire investigation were conducted. Some of collected items, including newspaper articles, reconnaissance reports, archives of various organizations, etc. have been compiled as appendices of the final report for further study.
Sonar investigation was carried out around the epicentral region in Aki-nada sea area to identify sea-bed fault causing the Geiyo earthquake. No sea-bed fault could be found, which proved that tsunami was not induced by the earthquake. Fault-rupture simulation using FEM method and synthesis of small fault-rupture process was also performed. Seismic intensity at Hiroshima-Kure re
… More
gion was estimated as V to VI on the JMA scale.
Much effort was devoted to the investigation of ground condition of the disaster-stricken area. Predominant period of ground in Hiroshima and Kure was determined by conducting both measure of microtremors and theoretical analysis employing multi-reflection theory. Liquefaction possibility in Matsuyama was analyzed and it was concluded that no liquefaction occurred, which coincided with the fact that no evidence of liquefaction was found. Furthermore, "vibro-corer" was invented for future use as an easy-to-operate device to sample soil piece of alluvium layr.
Fundamental studies on earthquake damage prediction were carried out in terms of seismic hazard analysis and damage assessment of buildings. In order to identify most-concerned seismic region, seismic hazard of Hiroshima city was analyzed, which showed the seismic activity in Aki-and Iyo-nada area had substantial contribution to the seismic hazard in Hiroshima. Dynamic response analysis of wooden structures and damage rate estimation of reinforced concrete structure were performed with emphasis on the effect of soil amplification. Less
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