Rapid Structural Damage Assessment through Time-varying Parameters
博士 === 國立成功大學 === 土木工程學系碩博士班 === 98 === The identification of structural damage is an important objective of health monitoring for civil infrastructures. In order to develop a real-time structural damage assessment system, many on-line damage assessment methods, such as the model-reference adaptive...
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| Format: | Others |
| Language: | en_US |
| Published: |
2010
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| Online Access: | http://ndltd.ncl.edu.tw/handle/13476439223691603697 |
| Summary: | 博士 === 國立成功大學 === 土木工程學系碩博士班 === 98 === The identification of structural damage is an important objective of health monitoring for civil infrastructures. In order to develop a real-time structural damage assessment system, many on-line damage assessment methods, such as the model-reference adaptive identification technique (MRAIT) and the on-line recursive least-squares (RLS) identification technique, are discuss in this thesis. In the MRAIT, the adaptation law for parameter estimation is designed based on Lyapunov’s direct method. An energy-like candidate function is composed of weighted response-tracking error and weighted parameter-estimation error. The RLS method is based on the framework of adaptive filters; the observations are obtained sequentially in real-time. It is desirable to perform the identification tasks recursively to reduce computation time and to be able to observe the variations of parameters on-line. By observing the variations of the identified time-varying modal properties of two benchmark models (benchmarks D and G) and a real building (Chung Hsing Civil and Environmental Engineering Department Building), global and local damage behavior due to weak elements or failure of components can be determined.
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