| Project/Area Number |
25420462
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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 |
Civil engineering materials/Construction/Construction management
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| Research Institution | Tohoku Gakuin University |
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Principal Investigator |
Lee Sanghun 東北学院大学, 工学部, 教授 (20377807)
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| Co-Investigator(Kenkyū-buntansha) |
KAMADA TOSHIRO 大阪大学, 大学院工学研究科, 教授 (10224651)
UCHIDA SHINYA 立命館大学, 理工学部, 講師 (70543461)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 衝撃弾性波法 / 欠陥の可視化 / 低周波数領域 / 3次元探査システム / 不規則な形の欠陥検出 / グラウト未充填率測定 / 探査システムの改良 / 低周波数域表示 / 損傷度評価 / 文献調査・ヒアリング / 供試体の製作および実験、その可視化 / 振動モードを考慮した衝撃弾性波法 / 低周波数領域への拡張 |
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| Outline of Final Research Achievements |
By expanding the domain of the visualization to a low frequency, the irregular defect cases, include the cases that the size of defects are small and the position of defects are shallow from the surface and the form of defects are round, were able to image.
As a construction of the measurement system which automate the repeating series of processes and display the position of the defect for three dimensions, not only the sectional defect images but the horizontal defect images are able to get for the test piece cut from a floor slab of a used bridge.
About the improvement of visualization performance gain by appropriate use of impacter, the relationship of impacter with measurement dimensions have been investigated by the preliminary experiments and it was confirmed that the high precision was provided with an appropriate impacter in the measurement.
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