| Project/Area Number |
15360291
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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 | The University of Tokyo |
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Principal Investigator |
SHIOHARA Hitoshi The University of Tokyo, Graduate School of Engineering, Associate Professor, 大学院・工学系研究科, 助教授 (50272365)
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| Co-Investigator(Kenkyū-buntansha) |
TASAI Akira Yokohama National University, Faculty of Engineering, Associate Professor, 大学院・工学部建設学科, 助教授 (40155057)
KABEYAAWA Toshimi The University of Tokyo, Earthquake Research Institute, Professor, 地震研究所, 教授 (00134479)
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥10,900,000 (Direct Cost: ¥10,900,000)
Fiscal Year 2004: ¥5,500,000 (Direct Cost: ¥5,500,000)
Fiscal Year 2003: ¥5,400,000 (Direct Cost: ¥5,400,000)
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| Keywords | Reinforced Concrete / Structure / Beam-Column Joint / Damage Evaluation / Strength Evaluation / Test / Mechanical Model / Design Method / 耐震設計 / 鉄筋コンクリート構造 / 静的漸増振幅載荷 / 梁降伏型 / マクロエレメント / 接合部せん断強度 / 弾塑性地震応答解析 / 統一モデル / 設計基準 |
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| Research Abstract |
The objective of this project is to establish on unified mechanical model and damage evaluation method for reinforced concrete beam-column joints including interior, exterior and knee joints under seismic loading and verification of the model with test specimens. The results of this project is briefly described as follows,
1.Results of analytical study on ultimate strength and failure mode of interior beam-column joint with proposed model called quadruple flexural resistance shows good correlation with previous test results and the effects of many parameters were declared.
2.Third scale three reinforced concrete interior beam-column subassembladges with or without eccentricity were tested. The test results indicated that the eccentricity in the joints led to lower capacity in story shear and severe damage of concrete on the side to which the center line of beams shifted. In the case of eccentric joint, large deflection to out-of-plane direction occurred and it seemed to have accelerated the concrete damage on the side of the joint to which the beams shifted.
3.Six specimens of one third scale reinforced concrete beam-column subassembladges with identical section and bar arrangement were loaded. In order to simulate the conditions of interior, exterior and knee joint, three types of boundary conditions and loading setup were provided. The test results indicated that the rotation of four parts of the joint divided with diagonal cracks was dominative in story drift deformation in case of joint failure after yielding of beams as the proposed model assumes. On the contrary, deflection of beams and rotation at beam ends were dominative in case of flexural failure of beam.
4.A macro element of beam-column joint for non-linear frame analysis was proposed. The model is constructed with non-linear uni-axial springs that are modeling concrete, bars and bond actions.
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