| Project/Area Number |
10555198
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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 | 展開研究 |
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| Research Field |
Building structures/materials
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
TAKIGUCHI Katsuki Graduate school of Information Science and Engineering, Tokyo Institute Technology Department of Mechanical and Environmental Informatics, Professor, 大学院・情報工学研究科, 教授 (10016644)
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| Co-Investigator(Kenkyū-buntansha) |
MIYASHITA Shinichi Tokyu Construction Corporation Section 8, The head office of buisiness, Chief, 構造設計部, 課長(研究職)
NAGASHIMA Toshio Takenaka Reserch & Development Institute, Takenaka Corporation Fundamental Research Department, General Manager, 技術研究所, 基礎研究部長
HOTTA Hisato Graduate school of Science and Engineering, Tokyo Institute of Technology Department of Architecture and Building Engineering, Associate professor, 大学院・理工学研究科, 助教授 (20190217)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥10,200,000 (Direct Cost: ¥10,200,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1998: ¥7,000,000 (Direct Cost: ¥7,000,000)
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| Keywords | reinforced concrete column / compression-bending-shear test / complete collapse / parallel keeping system / bond property / ferrocement / seismic strengthening / constant axial force / 高じん性 / (1)RC柱 / (2)圧縮曲げせん断実験 / (3)主筋の付着 / (4)完全崩壊 / (5)平行保持機構 / (6)フェロセメント / (7)せん断破壊 / (8)補強 / 重錘 / カウンターバランス弁 / せん断破壊 / 補強材 |
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| Research Abstract |
1.Compression-bending-shear test setup was developed. It is for reinforced concrete and/or steel encased reinforced concrete columns, and it enables complete collapse test. Constant axial force is loaded to the column specimen by steel weight. Relative rotational displacement between top stub and bottom stub of the column specimen is not permitted. Mechanical and hydraulic parallel keeping systems were developed. The column specimen can be stably loaded even at the stage that the restoring force direction is negative in the test in which the deformation is controlled to increase monotonically.
2.The effect of seismic strengthening method for shear failure type reinforced concrete column using ferrocement is clarified. Shear failure type column specimens and strengthened specimens with ferrocement were made and tested up to the extremely large deformation. The specimens failed in shear were repaired and strengthened with ferrocement, and then retested.
3.The relationship between the mechanical behaviors of a reinforced concrete column and bond properties of longitudinal rebars is investigated experimentally. Bond properties of longitudinal rebars of specimens were changed and restoring force characteristic of the specimens were exmined. Failure modes of the specimens subjected to compression, bending and shear were also observed in detail. Deformed bars and round bars were used as longitudinal rebars of the specimens. The bars were partially covered with paraffin wax in order to change the bond properties.
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