2013 Fiscal Year Final Research Report
Development of strong motions estimation method with high precision for disaster reduction during catastrophic earthquakes
| Project/Area Number |
23510223
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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 |
Natural disaster science
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| Research Institution | Aichi Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
IRIKURA Kojiro 愛知工業大学, 工学部, 教授 (10027253)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 地震災害 / 強震動 |
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| Research Abstract |
This study developed a method to evaluate strong ground motions with high precision for disaster reduction during great-earthquakes. A short-period source model of the 2011 Tohoku Earthquake was estimated using the empirical Green's function method (EGFM). Bedrock motions in a target area were estimated with small event motions. Velocity structures at damage sites were identified from H/V spectra of microtremors observed there. Surface motions calculated from the bedrock motions and transfer functions due to velocity structures were well consistent with recorded motions. Ground motions on surface during the 2009 Suruga Bay Earthquake were simulated using 3D FEM from input motions on bedrock calculated by the EGFM. Bedrock motions estimated for future Nankai Trough earthquakes using the characterized source model and the EGFM were consistent with those by Japanese Government. These results show that the method developed in this study is useful for evaluating strong ground motions.
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