Occurrence mechanism of horizontal cracks in RC decks.
| Project/Area Number |
24560581
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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 | Iwate University |
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Principal Investigator |
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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 |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 道路橋RC床版 / 水平ひび割れ / 収縮ひずみ / 道路橋ＲＣ床版 / 水平ひびわれ / ＲＣ床版 / 維持管理工学 |
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| Outline of Final Research Achievements |
We investigate the mechanism of occurence of horizontal cracks in RC decks. As a main objective, we focused the shrinkage stress of concrete after casting. In most cases of occerence of horizontal cracks, the origination of cracks is near reinforcements in the decks. Then we tried to survey the local stress of concrete generated in near area of reinforcement just after casting.
In this survey, we carried out some experiments researches and FEM analysis with 3D model. we can't measure the local stress of concrete in the experiments because the existing area of local stress is very small. Then we calculated the local stress by FEM analysis. In this FEM analysis, we can find out the probability of occurrence of local stress around the reinforcements. And the magnitude of local stress is influenced to occurence of horizontal cracks under acting of live loads.
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Report
(4 results)
Research Products
(5 results)
