Abstract
In the field of structural health monitoring (SHM), vibration-based structural damage detection is an important technology to ensure the safety of civil structures. By taking advantage of deep learning, this study introduces a data-driven structural damage detection method that combines deep convolutional neural networks (DCNN) and fast Fourier transform (FFT). In this method, the structural vibration data are fed into FFT method to acquire frequency information reflecting structural conditions. Then, DCNN is utilized to automatically extract damage features from frequency information to identify structural damage conditions. To verify the effectiveness of the proposed method, FFT-DCNN is carried out on a three-story building structure and ASCE benchmark. The experimental result shows that the proposed method achieves high accuracy, compared with classic machine-learning algorithms such as support vector machine (SVM), random forest (RF), K-Nearest Neighbor (KNN), and eXtreme Gradient boosting (xgboost).
Highlights
(3) Since Fast Fourier transform (FFT)-deep convolutional neural networks (DCNN) takes a short time on test datasets, it indicates that the proposed method can be utilized for the online detection of structural damage conditions in the field of Structural health monitoring (SHM)
If the accuracy metric is high, it represents that the FFT-DCNN has excellent performance, and the proposed methods can be applied to actual structural damage detection
This study proposed a novel FFT-DCNN model to identify structural damage detection and was verified on a three-story building structure and ASCE benchmark
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. ML algorithms recognize structural damage and location with high accuracy for small datasets, it is poor performance in handling the massive vibration data from SHM systems. High precision and robust structural damage detection method are proposed based on FFT-DCNN In this method, FFT is utilized to analyze the frequency information, reducing the influence of contaminated data [24,25]. The following are the primary contributions of this paper: (1) A novel sensor datadriven structural damage detection method is proposed by combining FFT with DCNN, which can effectively handle the vibration signal to recognize the structural damage condition. (3) Since FFT-DCNN takes a short time on test datasets, it indicates that the proposed method can be utilized for the online detection of structural damage conditions in the field of SHM.
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