| Project/Area Number |
11450201
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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 | 一般 |
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| Research Field |
Building structures/materials
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
JOH Osamu Hokkaido Univ., Graduate School of Eng., Prof., 大学院・工学研究科, 教授 (00002014)
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| Co-Investigator(Kenkyū-buntansha) |
KITANO Atsunori Hokkaido Univ., Graduate School of Eng., Instractor, 大学院・工学研究科, 助手 (80250471)
GOTO Yasuaki Hokkaido Univ., Graduate School of Eng., Assoc. Prof., 大学院・工学研究科, 助教授 (90170472)
柴田 拓二 北海道工業大学, 工学部, 学長 (30001142)
小林 朗 日鉄コンポジット, トウシート事業部, チームリーダー(研究職)
明星 徹 東燃株式会社, 複合材開発グループ, 主任研究員
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| Project Period (FY) |
1999 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 2002: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2001: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2000: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1999: ¥6,500,000 (Direct Cost: ¥6,500,000)
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| Keywords | Anchorage / Reinforced concrete / Steel & reinforced concrete / Anchorage strength / Deformability / 90-degree hook / Steel column base / Experiment / T型鋼 / U字形水平筋 / 3次元FEM解析 / 新素材 / せん断破壊 / 耐震補強 / ハイブリッド / 炭素繊維シート / 腰壁 |
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| Research Abstract |
The first stage of this project was to clarify anchorage performances of 90-degree hooked beam bars in reinforced concrete structures on the basis of experimetns. We provided twelve wall-beam joint specimens that had some variables on arrangements of wall reinforcement and L-shaped beam bar anchorage and on existence of special bars. The following results were obtained : (1) anchorage strength increased when the direction of tail bars was arranged upward or lateral, not downward, (2) providing many wall-tie bars made transmit stress zone become wider and anchorage strength increase, (3) anchorage strength of hooked bars increased when an additional fat steel bar was arranged horizontally at inside of the hooks because the bar resisted as a shear key, and (4) the good equation estimating anchorage strength could be proposed by considering the dowel action of wall bars.
The second stage of this project was to clarify anchorage performance of shape-steels in steel & reinforced concrete structures. The following results were obtained from loading tests of connections between RC foundation beams and a steel column base using T-shaped anchor steels : from the anchorage element tests, (1) pullout resistance of anchor steels was proportional to development length of the anchor steels, (2) geometrical second moment of cross area and length of anchor steels did not affect on initial stiffness of shear load vs. displacement relationship but increase of geometrical second moment of cross area enlarged maximum shear resistance, (3) maximum shear resistance decreased by 10 to 20% when anchor steels were subjected to combination of shear and pullout forces, and (4) from the beam-column joint tests, anchorage strength was kept without deterioration by anchor steels set in transverse beams after the tensile anchor steel reached to yielding.
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