| Project/Area Number |
17560436
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Osaka Institute of Technology |
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Principal Investigator |
INOUE Susumu Osaka Institute of Technology, FACULTY OF ENGINEERING, PROFESSOR (30168447)
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| Project Period (FY) |
2005 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2006: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2005: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | alkali-silica reaction / shear capacity / rupture of shear reinforcement / bond and anchorage / expansion of concrete / deterioration of material / outdoor exposure / bond strength / 屋外暴露 |
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| Research Abstract |
In recent years, it is reported in Japan that stirrups, as well as longitudinal steels, in T-shaped beams of bridge piers were ruptured at their bent corners mainly due to large ASR expansion. Therefore, it is essential to make clear the shear resistant mechanism of the beams, in which the stirrups are ruptured at the bent corner, in order to evaluate their residual shear capacity.
In this study, the effects of expansion of concrete as well as bond and anchorage characteristics of stirrups on shear behaviour are investigated. Bond strength of ASR damaged concrete is also examined in order to evaluate the bond and anchorage characteristics of ruptured steels.
From the test results, it is found that rupture of stirrups has relatively large influence on shear capacity of reinforced concrete beams. However, the degree of the influence depends largely on the anchorage characteristics of ruptured stirrups in ASR damaged concrete.
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