| Project/Area Number |
08305013
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
土木材料・力学一般
|
|---|
| Research Institution | Ritsumeikan University (1997-1998)
Kyoto University (1996) |
|---|
Principal Investigator |
KOJIMA Takayuki (1997-1998) Ritsumeikan University, Faculty of science and engineering, Professor, 理工学部, 教授 (10066706)
藤井 学 (1996) 京都大学, 工学研究科, 教授 (30031074)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
INOUE Susumu Osaka Institute of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (30168447)
KOBAYASHI Kazuo Osaka Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (10021586)
HATTORI Atsushi Kyoto University, Faculty of Engineering, Research Associate, 大学院・工学研究科, 助手 (30243067)
MIYAGAWA Toyoaki Kyoto University, Faculty of Engineering, Professor, 大学院・工学研究科, 教授 (80093318)
TAKAGI Nobuaki Ritsumeikan University, Faculty of science and engineering, Associate Professor, 理工学部, 助教授 (50154753)
|
|---|
| Project Period (FY) |
1996 – 1998
|
| Project Status |
Completed (Fiscal Year 1998)
|
| Budget Amount *help |
¥18,700,000 (Direct Cost: ¥18,700,000)
Fiscal Year 1998: ¥4,400,000 (Direct Cost: ¥4,400,000)
Fiscal Year 1997: ¥4,300,000 (Direct Cost: ¥4,300,000)
Fiscal Year 1996: ¥10,000,000 (Direct Cost: ¥10,000,000)
|
|---|
| Keywords | Reinforcement corrosion / Alkali-aggregate reaction / Concrete structure / Plan to counter earthquake disaster / Shear reinforcement / Continuous fiber sheet |
|---|
| Research Abstract |
Earthquake resistance of concrete structures deteriorated by carbonation of concrete, reinforcement corrosion due to chloride ion or expansion due to alkali-aggregate reaction was examined. The following results can be drawn.
(1) Sufficient strength and deformation were obtained, even when desalination was applied to PC beams. The brittle failure such as the breaking of prestressing bar due to the hydrogen enibrittlement was not observed.
(2) Shear strength of concrete decreased, when RC beams deteriorated due to alkali-aggregate reaction were applied to the reverse loading.
(3) The pattern of fatigue failure of RC beams deteriorated due to alkali-aggregate reaction changed from fatigue breaking of main reinforcement to crushing of concrete. Fatigue strength of RC beam will decrease, when the deterioration due to alkali-aggregate reaction is large.
(4) Same effect of shear reinforcement as the sound RC beam was obtained, when deteriorated RC beams were reinforced by using continuous fiber sheet.
(5) The damage elements, bond elements between steel and concrete or reinforcements and concrete were proposed and developed, and RC pier damaged, repaired or strengthened were analyzed by the FEM using these elements.
|
