2022 Fiscal Year Final Research Report
Investigation of Shear Resisting Mechanism of Fiber-Reinforced Concrete Members and Improvement of Evaluation Method for Shear Capacity
| Project/Area Number |
20K14809
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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 22020:Structure engineering and earthquake engineering-related
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 繊維補強RC棒部材 / せん断耐荷機構 / せん断耐力評価 / 画像解析 / FEM解析 |
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| Outline of Final Research Achievements |
Experimental and analytical investigations were conducted to clarify the effect of the combination of fiber reinforced concrete members, such as the amount of steel bars and the dimensions of the members, on the shear resistance mechanism of the members. It was found that the contribution of the beam mechanism to the shear resistance of RC members is maintained after diagonal cracking when fiber reinforcement is combined with shear reinforcement bars, and that the transition is similar to the shear force contributed by steel fibers. Furthermore, in the case of high strength fiber reinforced members without shear reinforcement bars, it was found that the shear resistance due to the arch action resists almost all of the shear forces after the diagonal crack initiation.
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| Free Research Field |
土木工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，近年積極的な構造利用が進められている繊維補強コンクリート部材に関して，普通強度レベルから超高強度レベルに至るまでの様々なコンクリートを対象に，その補強繊維が部材の破壊時にどの程度抵抗するかを明確にし，それが部材のせん断耐荷挙動に与える影響を検討した．繊維補強したコンクリート部材のせん断抵抗機構の変化と繊維の補強効果の関係に着目した新しい検討を通して，せん断補強鉄筋量と補強繊維量の組み合わせによって，この種の部材の耐力推定時に繊維の効果を考慮する方法を決定できる可能性が示唆された．
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