| Project/Area Number |
24246077
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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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, 工学(系)研究科(研究院), 特任教授 (20016702)
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| Co-Investigator(Kenkyū-buntansha) |
UJIKE Isao 愛媛大学, 大学院理工学研究科, 教授 (90143669)
MIYAZAWA Shingo 足利工業大学, 工学部, 教授 (10157638)
KAWAI Kenji 広島大学, 大学院工学研究院, 教授 (90224716)
NAKARAI Kenichiro 広島大学, 大学院工学研究院, 准教授 (10359656)
MARUYAMA Ippei 名古屋大学, 大学院環境学研究科, 准教授 (40363030)
OGAWA Yuko 広島大学, 大学院工学研究院, 助教 (30624564)
石田 剛朗 広島大学, 工学(系)研究科(研究院), 助教 (60420501)
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| Research Collaborator |
TANOMURA Makoto 太平洋セメント株式会社
HYODO Hikotsugu 太平洋セメント株式会社
KAMETA Shoichi 成田国際空港株式会社
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥34,060,000 (Direct Cost: ¥26,200,000、Indirect Cost: ¥7,860,000)
Fiscal Year 2014: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2013: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
Fiscal Year 2012: ¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
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| Keywords | 鉄筋コンクリート / 乾燥収縮 / せん断強度 / 寸法効果 / プレストレストコンクリート / 過大たわみ / 内部ひび割れ / 鉄筋腐食速度 / 土木材料 / 収縮 / 鉄筋腐食 / クリープ / 耐久性 |
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| Outline of Final Research Achievements |
Effects of drying shrinkage on structural and durability performance of reinforced concrete beams made of a ready mixed concrete were experimentally investigated in order to help establish " Durability Mechanics".
The following results were obtained. ①A simple method to predict drying shrinkage of concrete was proposed, ②Effects of drying shrinkage on internal cracking in cover concrete and reinforcement corrosion rate were estimated,③An abbreviated equation for creep coefficient was derived from measured concrete strain and reinforcement strain in concrete, ④An effective flexural stiffness equation incorporating drying shrinkage gradient in section was derived and excessive deflections of real prestressed concrete girders were predicted using this equation, ⑤It was verified that the shear strength of reinforced concrete beams was reduced remarkably and the size effect was also marked due to the effect of drying shrinkage before loading, compared with those of expansive beams.
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