Temperature Effect Separation of Structure Responses from Monitoring Data Using an Adaptive Bandwidth Filter Algorithm

Temperature is one of the most important factors significantly affecting damage detection performance in civil engineering. A new method called the Adaptive Bandwidth Filter Algorithm (ABFA) is proposed in this paper to separate the temperature effect from quasi-static long-term structural health mo...

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Bibliographic Details
Published in:Materials 2024-01, Vol.17 (2), p.465
Main Authors: Hu, Anqing, Liu, Gang, Deng, Changjun, Luo, Jun
Format: Article
Language:English
Subjects:
Adaptive algorithms
Algorithms
Bandwidths
Concrete
Damage detection
Data collection
Influence
Mathematical optimization
Methods
Optimization
Particle swarm optimization
Principal components analysis
Spectrum analysis
Statistical analysis
Structural health monitoring
Temperature effects
Time
Wavelet transforms
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Summary:Temperature is one of the most important factors significantly affecting damage detection performance in civil engineering. A new method called the Adaptive Bandwidth Filter Algorithm (ABFA) is proposed in this paper to separate the temperature effect from quasi-static long-term structural health monitoring data. The Adaptive Bandwidth Filter Algorithm (ABFA) is referred to as an algorithm of automatically adjusting the frequency bandwidth filter via the particle swarm optimization (PSO) algorithm. Considering the obvious multi-scale feature of the collected data of civil structure, the acquired time series are divided into different time scales (for example, day, month, year, etc.), and these scales in the frequency domain correspond to the center frequencies of the adaptive bandwidth filter. The temperature effect on structure responses across different time scales is thereafter explored by adaptively adjusting the frequency bandwidth of the filter based on the known center frequencies of different scales. The relationship between the temperature and the structure responses is established through statistical regression facilitated by sufficient in situ monitoring data. Simulation and experiment results show the very promising performance of the proposed algorithm and decouple the temperature effect accurately from the contaminated data; thus an enhanced capability of damage detection is achieved.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma17020465