2006 Fiscal Year Final Research Report Summary
Investigation of Seismic Hazard in Nile Delta Area
| Project/Area Number |
16404010
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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 | 海外学術 |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Kobe Gakuin University (2006)
Waseda University (2005)
Kyoto University (2004) |
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Principal Investigator |
SATO Tadanobu Kobe Gakuin University, Institute for Interdisciplinary Education, Professor, 学際教育機構, 教授 (00027294)
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| Co-Investigator(Kenkyū-buntansha) |
KONAGAI Kazuo The University of Tokyo, Institute of Industrial Science, Professor, 生産技術研究所, 教授 (50126471)
HORI Muneo The University of Tokyo, Earthquake Research Institute, Professor, 地震研究所, 教授 (00219205)
SAWADA Sumio Kyoto university, Disaster Prevention Research Institute, Professor, 防災研究所, 教授 (70187293)
HONDA Riki The University of Tokyo, School of Engineering, Department of Civil Engineering, Associate Professor, 工学系研究科, 助教授 (60301248)
MORIKAWA Hitoshi Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Associate Professor, 大学院総合理工学研究科, 助教授 (60273463)
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| Project Period (FY) |
2004 – 2006
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| Keywords | Nail delta / Cairo city / Crust structure / Seismic activities / Gravity anomaly / AR-MA process / Simulation of earthquake motion / Fault mechanism |
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| Research Abstract |
To conduct seismic hazard analyses in Nail delta area we need the information of ground structure and amplification effect of seismic motion in the area. However earthquake observations and detail ground explorations have not been conducted in Nail delta. The information to be used for determining fault rupture parameters of a future earthquake has not also been corrected although the seismic activities and crust structure and its movement as well as gravity anomaly in the area surrounding Cairo city has surveyed form the beginning of 1950
The purpose of this study is to collect data of historical and recent seismic activities surrounding Cairo city for estimating fault mechanisms of earthquakes which caused sever damage to infrastructures in Cairo city. Based on these data we proposed future earthquake scenarios for simulating proper seismic design earthquake motions. The soil exploration data were also collected.
Using collected data earthquake motions of a future event are synthesized by superposing stochastic small earthquake motion. To developed a method for synthesize stochastic small earthquake motions using the AR-MA process we collected observed small earthquake motions at several places in Cairo city. The effect of strike, dip angle of the fault and a starting point of rupture on an attenuation of peak acceleration was investigated. The attenuation characteristic of peak accelerations obtained from simulated earthquake motions were studied in order to investigate the relation between peak accelerations and positions of the fault to the observation points. The peak acceleration at the region near the fault was much influenced by the difference of the starting point of rupture as well as the magnitude and the epicenter distance.
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