| Project/Area Number |
21560504
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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 | Kagawa University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2011: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 塩害劣化 / 鉄筋腐食 / 劣化予測 / ひび割れモード / 数値シミュレーション / 現場計測 / 乾漆繰返試験 / 予測手法 / 腐食ひび割れモデル / 鉄筋の腐食速度 / 腐食促進試験 / 腐食ひび割れ |
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| Research Abstract |
In this paper, the prediction model for chloride induced damage is developed. The developed system consists of three segments, incubation period, progressive period and developed period. Incubation period is modeled using Fick' s diffusion equation. Corrosion speed of reinforcement is modeled using three parameters, diffusion coefficient, temperature, chloride ion density close to reinforcement.
The cracking model is considered by three mode, cracking along reinforcement, peeling off and horizontal cracking along reinforcement. This system is verified using existing concrete structure which has passed 35 years received chloride induced damage. This system coincides with the estimate data and the data in situ on corrosion rate, chloride ion density close to reinforcement and cracking mode.
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