| 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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| 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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