Clarification of alteration mechanism of seismic motion reached to landslide area
| Project/Area Number |
25450231
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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 |
Forest science
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| Research Institution | Forestry and Forest Products Research Institute |
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Principal Investigator |
OKAMOTO Takashi 国立研究開発法人 森林総合研究所, 東北支所, チーム長 (30353626)
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| Co-Investigator(Renkei-kenkyūsha) |
MATSUURA Sumio 京都大学, 防災研究所, 教授 (10353856)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 地すべり / 地震 / 加速度 / 振動特性 / 地震動 / 観測 / 周波数 |
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| Outline of Final Research Achievements |
To clarify seismic vibration characteristics reached to landslide mass, we monitored seismic ground motion in a landslide site of Niigata Prefecture, Japan. Strong-motion seismographs were installed in the landslide mass and outside of it. Landslide mass is formed by strong weathered mudstone and tuff. Two analyzable earthquakes (Mj3.0 and 6.7) were observed in the site. Maximum seismic acceleration and maximum velocity in the landslide were stronger than out of the landslide. It showed the seismic vibration increased on the landslide mass. As the result of Fourier analysis, we found the vibration with approximately 1Hz was amplified on the landslide mass. We considered the amplification as the reason that the seismic vibration increased in the landslide.
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Report
(4 results)
Research Products
(6 results)
