| Project/Area Number |
26420465
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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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 | Nihon University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
仙頭 紀明 日本大学, 工学部, 准教授 (40333835)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2016: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Keywords | 疲労 / 凍結 / 含水状態 / RCはり / 耐疲労性 / コンクリート / 含水率 / 低温環境 |
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| Outline of Final Research Achievements |
This study evaluates the compressive and splitting tensile strength of concrete cylinders, as well as RC beam flexure properties, via static loading and fatigue testing carried out on specimens under controlled ambient temperature and moisture content conditions. The results showed that while dry concrete was unaffected by ambient temperature, water saturated concrete specimens showed reduced static strength as well as a reduction in the number of fatigue failure cycles under normal temperature conditions. However, those same saturated concrete specimens showed an increase in static compressive strength under low-temperature (freezing) conditions. Furthermore, the flexural behavior of RC beams under water saturation conditions showed load carrying capacity and fatigue resistance reductions under normal temperature conditions, but increased load carrying capacity under low-temperature conditions.
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