2019 Fiscal Year Final Research Report
Study on seismic performance of flexible retaining walls using discontinuum-continuum coopled analysis: Focusing on masonry walls
| Project/Area Number |
18K13829
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 22030:Geotechnical engineering-related
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| Research Institution | Hiroshima University |
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Principal Investigator |
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| Project Period (FY) |
2018-04-01 – 2020-03-31
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| Keywords | 石積擁壁 / 地震時挙動 / 数値解析 |
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| Outline of Final Research Achievements |
There are many retaining walls with flexible structures, such as castle stone walls and masonry retaining walls along railroad lines in Japan. On the other hand, since each stone can move independently, its mechanical behavior is complex, and its mechanical properties, e.g., the effect of the stacking conditions of the stones on stability, are not clear. In this study, a seismic response analysis method considering the interaction between the ground and the masonry structure was developed to clarify the seismic behavior of a masonry retaining wall, and its validity was verified by reproducing a model shaking table experiment of a masonry wall. In addition, the developed method was used to investigate the differences in seismic behaviors due to the way stone is stacked under various conditions, and the relationship between the acceleration leading to the collapse and the changes in the deformation shape of the wall was clarified.
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| Free Research Field |
地盤工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，研究代表者が従来地盤―石積構造物間の準静的な相互作用問題の解析手法として開発してきたマニフォールド法―不連続変形法連成解析に，石材どうしあるいは石材と地盤の間に生じる摩擦力や，地盤の変形を精度良く取り扱うための技術を導入・発展させることで，石積擁壁の動的挙動を精緻に表現可能なシミュレーション技術を実現しており，今後の安定性評価への活用が期待される．また，それを用いて得られた石積壁の地震時力学特性は脆弱な石垣等を抽出するための基礎資料として有用である．
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