2001 Fiscal Year Final Research Report Summary
Estimation of strong ground motion during the 1923 Konto earthquake considering effects of 3D basin structure
| Project/Area Number |
09305036
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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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 | Tokyo Institute of Technology |
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Principal Investigator |
SEO Kazuoh Dept. of Built Environ. Tokyo Institute of Technology Prof., 大学院・総合理工学研究科, 教授 (30089825)
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| Co-Investigator(Kenkyū-buntansha) |
KINUGASA Yoshihiro Dept. of Built Environ. Sci. and Tech. Tokyo Institute of Technology Prof., 大学院・総合理工学研究科, 教授 (30313365)
KURITA Katsumi Dept. of Environ. Sci. and Tech. Tokyo Institute of Technology Research Associate, 大学院・総合理工学研究科, 助手 (90282871)
YAMANAKA Hiroaki Dept. of Environ. Sci. and Tech. Tokyo Institute of Technology Assoc. Prof., 大学院・総合理工学研究科, 助教授 (00212291)
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| Project Period (FY) |
1997 – 2000
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| Keywords | Kanto plain / Microtremorarray measurements / S-wave velocity / long-period strong ground motion / finitedifference method / Kanlo earthquake / strong motion simulation / 3D simulation |
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| Research Abstract |
This study was conducted aiming at estimating strong ground motion in the Kanto plain during the 1923 Kamo earthquake considering effects of threc-dimensionally irregular h*ucture in the area. First, we constructed a 3D S-wave velocity model for the Kiinto basin from microlremor array measurements. Then, characteristics of seismic wave p**pagation and amplification in the basin were investigated using observed earthquake records. In particular, complex features of surface wave propagation in a period range longer than 4 seconds was revealed indicating strong effects of basinftiruciure. We, next, simulated earthquake ground motion observed in the tires during small and moderate events using finite difference code developed in this study. The complex propagation features were qualitatively reconstructed, when we used the 3D S-wave velocity model. The same simulation procedure was applied to estimate strong ground motion of the 1ー23 Knnlo earthquake.
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