| Project/Area Number |
10450175
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
構造工学・地震工学
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| Research Institution | Kumamoto University |
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Principal Investigator |
OHTSU Masayasu Graduate School of Science and Technology, Kumamoto University, Professor, 大学院・自然科学研究科, 教授 (80109016)
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| Co-Investigator(Kenkyū-buntansha) |
MIYAMOTO Ayaho Yamaguchi University, Professor, 工学部, 教授 (10093535)
ROKUGO Keitetsu Gifu University, Professor, 工学部, 教授 (40127155)
MIKI Chitoshi Tokyo Institute of Technology, Professor, 工学部, 教授 (20016645)
SHIGEISHI Mitsuhiro Kumamoto Univ., Associate Professor, 工学部, 助教授 (50253761)
KAMADA Toshiro Gifu University, Associate Professor, 工学部, 助教授 (10224651)
森川 英典 神戸大学, 工学部, 助教授 (70220043)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥12,700,000 (Direct Cost: ¥12,700,000)
Fiscal Year 2000: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1999: ¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 1998: ¥5,700,000 (Direct Cost: ¥5,700,000)
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| Keywords | Diagnosis / Steel Structure / Concrete Structure / Nondestructive Inspection / Prediction of Deterioration / Acoustic Emission / Ultrasonics / Expert System |
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| Research Abstract |
Concerning the diagnostic methods for infrastructure, nondestructive inspections and evaluation systems are surveyed worldwide in this research. Related with the interested fields of investigators, these are categorized into six research fields. The one is the application of acoustic emission (AE) to diagnosis of concrete structures. AE moment tensor analysis is developed and applied to concrete structures to identify cracking mechanisms. The second is nondestructive testings of concrete. Ultrasonics, half-cell potential measurement, radar inspection, and thermography are investigated and developed for in situ observation. The third is nondestructive evaluation and fracture mechanisms of concrete members. In order to estimate the deterioration process of concrete structures, nondestructive evaluation is conducted on the basis of fracture mechanics. This leads to quantitative evaluation of the deterioration. The fourth is nondestructive testings and damage evaluation of steel structures. The main target for inspection is the defects in steel members. The fifth is prediction of the deterioration process of bridge structures, and the sixth is the expert systems for bridge maintenance. Thus, evaluation procedures are surveyed and new systems are developed.
Since it is recently reported that many of civil structures are going to reach their service-life limit due to aging and disasters all over the world, the research conducted is in urgent demand. Accordingly, the updated summary of the methods is eventually proposed. The report is so comprehensive as to be applicable and able to contribute to a variety of diagnostic procedures for infrastructure.
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