2017 Fiscal Year Final Research Report
Hybrid damage detecting method with high density modal idenntification and thermographic examination of infrastructural system
| Project/Area Number |
15K06176
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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 |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Kitami Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 構造ヘルスモニタリング / 温度依存性 / 固有振動数 |
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| Outline of Final Research Achievements |
To realize structural health monitoring using vibration measurement data, even though the structure keeps intact condition, its dynamic characteristics fluctuate due to the influence of temperature and other environmental conditions. Therefore, in this study, vibration measurement was carried out on concrete specimens and actual bridge, and it was confirmed that the change of the vibration characteristics by internal temperature is important for identifying structural damages. In particular, in the prestressed concrete specimen, effects of both temperature change and cracks of concrete member was examined. As a result, the vibration characteristics change caused by large damage exceeds the effect of the temperature change while temperature effects is still large for small damaged or intact structure. In addition, it was also found that the measured value fluctuated greatly in the temperature measurement of the thermographic camera in the real environment.
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| Free Research Field |
橋梁工学、構造動力学
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