| Budget Amount *help |
¥24,830,000 (Direct Cost: ¥19,100,000、Indirect Cost: ¥5,730,000)
Fiscal Year 2015: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
Fiscal Year 2013: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
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| Outline of Final Research Achievements |
Shear failure of concrete members is related to the fracture failure behavior of the concrete in tension. The presence of micro cracks due to the volume expansion of concrete during the hardening or material damages such as Alkali-Silica Reaction (ASR) also affects the fracture failure behavior of concrete. In this study, the fracture of materials which was pre-damaged due to the several reasons was investigated in detail. In addition, the damaged concrete members failed in shear were tested. Interestingly, the distribution of internal cracks in the concrete induced by the ASR was observed by means of a three dimensional integration technique using digital images which was captured from a thinly sliced concrete specimen polished from its surface. The fracture properties of the ASR damaged concrete were evaluated by not only conventional procedures and also the image analysis in order to measure the crack propagation in the concrete during loading tests.
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