2022 Fiscal Year Final Research Report
Release of Potential Self-Healing Ability of Seismic Isolation Rubber Bearings by Thermal Injection
| Project/Area Number |
20K21028
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 23:Architecture, building engineering, and related fields
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
京谷 孝史 東北大学, 工学研究科, 教授 (00186347)
松原 成志朗 名古屋大学, 工学研究科, 助教 (40823638)
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| Project Period (FY) |
2020-07-30 – 2023-03-31
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| Keywords | ゴム / Mullins効果 / 損傷 / 損傷回復 / 異方性損傷 / 熱連成 / 動的解析 / 免震 |
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| Outline of Final Research Achievements |
When subjected to a cyclic loading, rubber exhibits a hysteresis behavior due to internal damage, known as the Mullins effect. Rubber has a self-healing ability and can recover slowly over time. This damage recovery phenomenon of rubber can be accelerated by injecting heat from the outside. In this study, we developed a mathematical model that can describe such a series of phenomena. In addition, the numerical analysis illustrates that the seismic isolation function of a structure can be restored by recovering from the damage of rubber isolation bearings caused by earthquake damage.
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| Free Research Field |
Civil Engineering
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| Academic Significance and Societal Importance of the Research Achievements |
構造物の免震ゴム支承は地震履歴を受けることで内部損傷を生じる．ゴムは潜在的な自己治癒能力を有し，受けた損傷は時間とともに緩やかに回復し得るが，外部から熱を注入することによって損傷回復を早めることが可能である．大きな構造物になるほど，免振ゴム支承の取り換え費用は高額になるため，外部から熱を注入することで損傷回復を早めることができるのであれば，大変有意義である．本研究では損傷回復をシミュレーション可能な数値モデルを構築し，このような方法が効果を発揮し得ることを示した．
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