A proposal of estimation method of incident wave to base rock considering effect of multidimensional wave propagation and nonlinearity of surface ground
| Project/Area Number |
16K14303
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geotechnical engineering
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| Research Institution | Nagoya University |
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Principal Investigator |
YAMADA Shotaro 名古屋大学, 工学研究科, 准教授 (70346815)
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| Co-Investigator(Kenkyū-buntansha) |
浅岡 顕 公益財団法人地震予知総合研究振興会, その他部局等, 副首席主任研究員 (50093175)
野田 利弘 名古屋大学, 減災連携研究センター, 教授 (80262872)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 地震波 / 非線形 / 多次元波動伝播 / 弾塑性解析 / 水～土連成解析 / 粘性境界条件 / 材料非線形性 / 基盤 / 地震工学 / 地盤工学 / 表層地盤 / 非線形性 / 直達波 |
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| Outline of Final Research Achievements |
In this study, new utilization of the viscous boundary condition that enables to estimate an upward wave in bedrock from an observational record in consideration of non-linearity and the influence of multi-dimensional wave propagation (refraction, transmission, reflection) by using a non-linear finite element code for soil was proposed. We verified that the proposed method behaves properly under a condition in which liquefaction phenomena and multi-dimensional wave propagation occurred.
In order to adopt to real problems, the observed record at the rock base of the Aratozawa dam bottom in the 2008 Iwate-Miyagi Nairiku Earthquake was picked up. We successfully reproduced the properties of the above-mentioned records and estimated the upward transmitting wave at the bedrock on the same point and estimated the upward transmitting wave in the bed-rock by using the proposed method. The results obtained in this study must raise a question about the future design of structures.
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Report
(3 results)
Research Products
(9 results)
