2021 Fiscal Year Final Research Report
Width and space of crack on reinforced concrete members based on stress transfer mechanism
| Project/Area Number |
19K04697
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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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| Review Section |
Basic Section 23010:Building structures and materials-related
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| Research Institution | Daido University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 鉄筋コンクリート / ひび割れ / ひずみ度 / 画像相関法 |
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| Outline of Final Research Achievements |
Internal strain of reinforced concrete member was measured during the loading test of reinforced concrete cantilever beams. Strain of reinforcing bars was linearly distributed before crack appearance on concrete. After appearance of a crack on concrete, the strain of reinforcing bars at crack increased and the distribution of strain was not linear. Strain of concrete became larger closing to the reinforcing bar before crack appearance. After cracking, there was no remarkable difference in concrete strain due to the distance from the reinforcing bar.
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| Free Research Field |
鉄筋コンクリート構造
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| Academic Significance and Societal Importance of the Research Achievements |
鉄筋コンクリート造建物は耐用年数が長く, 長期間継続して使用することによって環境負荷を低減することが期待できる。一方, 経年に伴ってひび割れが発生するなどの問題が生じる。発生するひび割れの幅を小さく抑えることが出来れば, 補修をすることなく継続して使用できるため, ひび割れ幅の制御が課題となっている。本研究で得られた成果はひび割れの幅や間隔を推定する上で必要となるひずみ度の分布が得られた。
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