| Project/Area Number |
24656272
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Civil engineering materials/Construction/Construction management
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| Research Institution | Hiroshima University |
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Principal Investigator |
SATO Ryoichi 広島大学, 大学院・工学研究院, 特任教授 (20016702)
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| Co-Investigator(Kenkyū-buntansha) |
OGAWA Yuko 広島大学, 大学院・工学研究院, 助教 (30624564)
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| Research Collaborator |
亀田 昭一 成田国際空港株式会社
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| Project Period (FY) |
2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 鉄筋ひずみ / 収縮ひずみ / 応力損失 / クリープ係数 / 収縮 / 鉄筋拘束ひずみ / 線形クリープ則 / 増分クリープ係数 |
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| Research Abstract |
A method to obtain tensile creep coefficient of concrete with W/C=0.5 was investigated, based on measured reinforcement strains in centrically reinforced concrete prisms due to drying and measured drying shrinkage strains in the companion prisms without restraint, in which nominal reinforcement ratios were in 6 levels from 0.1% to 2.4%. As a result, incremental creep coefficients at different loaded ages were obtained andhowever, the dependence of values of creep coefficient on loading age was not shown. Related to this, a method to evaluate creep coefficients of concrete in a prestressed concrete beam was developed by measuring stains in prestressing tendons and shrinkage strain of the companion specimen without prestressing tendons and the method was verified to be valid.
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