| Budget Amount *help |
¥3,289,000 (Direct Cost: ¥2,530,000、Indirect Cost: ¥759,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2008: ¥1,729,000 (Direct Cost: ¥1,330,000、Indirect Cost: ¥399,000)
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| Research Abstract |
Research was carried out to examine the feasibility of Lamb and Rayleigh in establishing efficient non-destructive evaluation methods for maintenance and diagnosis of concrete structures. The following are findings based on fundamental experimental studies : (1) Dispersion of Lamb waves due to the change in elastic properties of concrete was confirmed ; (2) A quantitative method for evaluating concrete crack utilizing the relation between Rayleigh wave amplitude change and crack depth can be proposed, (3) With phase velocity of Rayleigh waves as input, defect inside concrete can be visualized using tomography reconstruction technique.
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