Grant-in-Aid for Scientific Research (A)
|Allocation Type||Single-year Grants |
|Research Institution||Tohoku University |
SUZUKI Motoyuki Tohoku University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (60124591)
AKIYAMA Mitsuyoshi Tohoku University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (00302191)
NAITO Hideki Tohoku University, Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (50361142)
|Project Period (FY)
2002 – 2005
Completed (Fiscal Year 2005)
|Budget Amount *help
¥44,590,000 (Direct Cost: ¥34,300,000、Indirect Cost: ¥10,290,000)
Fiscal Year 2005: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2004: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2003: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2002: ¥24,310,000 (Direct Cost: ¥18,700,000、Indirect Cost: ¥5,610,000)
|Keywords||High Strength Materials / Steel-Concrete Composite Structure / High Performance Seismic Member / Reinforced Concrete / Concrete Encased Steel / Shear Strength Characteristic / Stress-Strain Relationship / Ductility Evaluation / 超高強度コンクリート / 鉄筋コンクリート構造 / 鉄骨鉄筋コンクリート構造 / 耐震設計法 / 高性能耐震構造部材 / 部材損傷 / 圧縮破壊エネルギー / H形鋼の局部座屈解析 / 高強度鉄筋 / 高耐力・高靭性 / 超高強度構成材料 / RC柱 / 一軸圧縮実験 / コンファインド効果 / 横拘束筋 / コアコンクリート / 局所化領域 / 超高強度材料 / 圧縮軟化 / 定着|
In this study, the development and the seismic design approach of high performance structures using RC and SRC members have been done. The results of the study from 2002 to 2004 are shown below.
1. Shear strength characteristic of RC beams using high-strength materials
The shear loading tests of RC beams without stirrup using high-strength concrete of compressive strength ranging to 130MPa have been carried out.
(1)A shear strength equation of RC beams without stirrup using high-strength concrete has been suggested.
(2)A shear strength equation of RC beams with stirrup using high-strength concrete and reinforcing bars has been suggested by referring to the previous test results.
2. Uniaxial compressive strength characteristic of RC columns using high-strength materials
The uniaxial compressive loading tests of RC columns (rectangular and circular section) have been carried out.
(1)By measuring the strain distribution of the core concrete, it is possible to quantitatively evaluate the changing of failure region caused by the concrete strength and the quantity of tie reinforcement.
(2)By using the compressive failure energy, the stress-strain relationship of confined concrete of normal to high strength has been formulated.
3. Reversed cyclic loading tests of SRC columns and the ductility evaluation
Load-deflection characteristics, plastic curvature distribution, and strain distribution of longitudinal bars and H-shaped steel were measured in the cyclic loading tests of SRC columns.
(1)The buckling analysis model of longitudinal bars has been suggested. Using this model, it is possible to fairly evaluate the displacement at the spalling of RC and SRC columns.
(2)A ductility evaluation of SRC columns focused on the local buckling of the H-shaped steel has been suggested. The same response can be obtained by using proposed method to calculate the ultimate displacement, the buckling length and plastic length of flange plate.