Damage Detection in CFST Column by Simulation of Ultrasonic Waves Using STFT-Based Spectrogram and Welch Power Spectral Density Estimate

Mutlib, Nadom Khalifa; Ismael, Muna N.; Baharom, Shahrizan

doi:10.32604/sdhm.2021.010725

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…Even though, an investigation of interest [23] of a concrete structure with holes located in different depths, demonstrated that the UPV, using the through-transmission technique, does not have a linear relation of the size of the internal hole, since the time of flight of the ultrasonic pulse of the signals traveling through an internal hole were similar to the ones in the intact concrete, but there was a clear difference in the location in time and amplitude of the energy of the fundamental frequency evaluating the received signal in the time-frequency domain using a combination of the Short-Time Fourier Transform and the Wavelet Transform, called S Transform. Similar results were obtained in a simulation study carried out by Nadom K. et al [26]. The detection of damage and its size is subject to the change in the colour scheme of the STFT spectrogram.…”

Section: Introductionsupporting

confidence: 87%

Damage Detection Using Ultrasonic Techniques in Concrete-Filled Steel Tubes (CFSTs) Columns

Callejas

Palma

Hernández-Figueirido

et al. 2022

Sensors

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Concrete-filled steel tubes (CFSTs) are structural elements that, as a consequence of an incorrect elaboration, can exhibit internal defects that cannot be visualized, being usually air voids. In this work, the detection of internal damage in CFST samples elaborated with a percentage of contained air voids in concrete, was carried out by performing a complete ultrasound scan using an immersion tank. The analysis of the ultrasound signals shows the differences presented in the amplitude of the fundamental frequency of the signal, and in the Broadband Ultrasound Attenuation (BUA), in comparison with a sample without defects. The main contribution of this study is the application of the BUA technique in CFST samples for the location of air voids. The results present a linear relationship between BUA averages over the window of the CFSTs and the percentage of air voids contained (Pearson’s correlation coefficient r = 0.9873), the higher percentage of air voids, the higher values of BUA. The BUA algorithm could be applied effectively to distinguish areas with defects inside the CFSTs. Similar to the BUA results, the analysis in the frequency domain using the FFT and the STFT was sensitive in the detection of internal damage (Pearson’s correlation coefficient r = −0.9799, and r = −0.9672, respectively). The results establish an improvement in the evaluation of CFST elements for the detection of internal defects.

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Section: Introductionsupporting

confidence: 87%

Damage Detection Using Ultrasonic Techniques in Concrete-Filled Steel Tubes (CFSTs) Columns

Callejas

Palma

Hernández-Figueirido

et al. 2022

Sensors

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“…Time-frequency analysis is a common method for UGW, which analyzes the time domain and frequency domain of the signal to extract the damage characteristics. Commonly used time-frequency analysis methods include short-time Fourier transform, 15 wavelet transform, 16 Wigner-Ville distribution, [17][18][19] etc. However, due to the complex spiral structure and coupling contact of the messenger cable, the UGW has more complex modes, causing the traditional time-frequency analysis methods to have less accuracy in extracting and identifying damage information for the messenger cable in cladding zone.…”

Section: Introductionmentioning

confidence: 99%

Cross-sparse representation based on dispersion dictionary for ultrasonic guided wave to messenger cable damage detection in cladding zone

Jian-xi

Lin

Hong

et al. 2023

Structural Health Monitoring

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The damage detection of messenger cable is an important guarantee to ensure the safety of electrified railways. The traditional nondestructive testing methods have difficulty in accurately detecting the damage of messenger cable in cladding zone. In this paper, a novel cross-sparse representation (CSR) method based on dispersion dictionary for ultrasonic guided wave (UGW) is proposed for the outer stranded wire of messenger cable in cladding zone. Firstly, the dispersion curves of UGW in multilayer spiral structure are solved by semi-analytical finite element method, to select an appropriate excitation signal. Secondly, the stationary phase approximation method is used to construct dispersion dictionary according to the dispersion curve which can characterize the modes and propagation distance of UGWs, and the CSR is proposed to separate and identify the damage signal. Thirdly, the simulation models of different damages in the outer stranded wire of messenger cable in the cladding zone are established to analyze the correlation between the damage rate and damage index in the cross-sections. Finally, the damage recognition effect based on CSR is analyzed and compared by experiments. The experimental results show that compared with the sparse representation (SR) method using traditional dictionary, the proposed method can improve the average accuracy of damage signal recognition from about 20% to 99.4% within a wide threshold range.

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Damage Detection in CFST Column by Simulation of Ultrasonic Waves Using STFT-Based Spectrogram and Welch Power Spectral Density Estimate

Cited by 2 publications

References 19 publications

Damage Detection Using Ultrasonic Techniques in Concrete-Filled Steel Tubes (CFSTs) Columns

Damage Detection Using Ultrasonic Techniques in Concrete-Filled Steel Tubes (CFSTs) Columns

Cross-sparse representation based on dispersion dictionary for ultrasonic guided wave to messenger cable damage detection in cladding zone

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