Study on property change during multiple liquefaction events and its prediction
| Project/Area Number |
15H04036
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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 | 一般 |
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| Research Field |
Geotechnical engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KOSEKI Junichi 東京大学, 大学院工学系研究科(工学部), 教授 (30272511)
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| Co-Investigator(Renkei-kenkyūsha) |
MIYASHITA Yukika 東京大学, 生産技術研究所, 技術職員 (20396914)
MATSUMARU Takaki 東京大学, 大学院工学系研究科, 助教 (00425927)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2015: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
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| Keywords | 地盤工学 / 地盤防災 / 再液状化 / 室内土質試験 / 模型振動実験 / 初期せん断 |
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| Outline of Final Research Achievements |
In order to investigate experimentally the property change during multiple liquefaction events, a series of stacked-ring simple shear tests under constant volume condition, undrained cyclic torsional shear tests on hollow cylindrical specimen, and shaking table tests on level saturated sand ground model was conducted. As a result, it was revealed that, irrespective of the past liquefaction histories, the re-liquefaction resistance is largely reduced when the immediate-past liquefaction stage induces a significant shear strain. It was also verified that the accuracy of prediction of the re-liquefaction resistance can be improved by normalizing the energy that is dissipated during the immediate-past liquefaction stage with the current mean effective stress.
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Report
(4 results)
Research Products
(24 results)
