Damage Detection in Concrete by Fourier and Wavelet Analyses

Melhem, Hani; Kim, Han-Sang

doi:10.1061/(asce)0733-9399(2003)129:5(571)

Cited by 81 publications

(52 citation statements)

References 11 publications

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“…Fourier Transform is used to calculate the signal frequency content, but it cannot determine when the frequency components have occurred (Melhem and Kim, 2003, Neild et al, 2003, Wang and Chen, 2011. In other words, Fourier Transform is appropriate for processing those signals that their frequency content does not change with time.…”

Section: The Best Tfr To Process Response Signals Of Bridge Piersmentioning

confidence: 99%

A harmonic vibration, output only and time-frequency representation based method for damage detection in Concrete piers of complex bridges

Ahmadi¹,

Daneshjoo

2012

IJCSER

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Due to damage, vibrations of bridge piers compared with undamaged state would be changed. A new signal-based algorithm is proposed to extract feature and detect damage in complex bridges. According to the proposed algorithm, it is necessary to vibrate the bridge before and after damage by exciting force and record responses at the middle and top of the piers. For this purpose, sine and cosine transient forces were applied to the analytical model of Ghotour Bridge and the signals of pier responses were recorded. Using reduced interference distribution, the response signals were processed and time-frequency plans were calculated. Modified matrix subtraction method was proposed to detect damage. Based on the results, damage was identified and located with good accuracy. The proposed algorithm is an outputonly method and in practice there is no need to create an analytical model of an existing complex bridge for damage detection.

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Section: The Best Tfr To Process Response Signals Of Bridge Piersmentioning

confidence: 99%

A harmonic vibration, output only and time-frequency representation based method for damage detection in Concrete piers of complex bridges

Ahmadi¹,

Daneshjoo

2012

IJCSER

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show abstract

“…Melhem & Kim (2003) used continuous wavelet transform and Fourier analysis to detect damage on two full-scale concrete structures (a prestressed beam and pavement on grade) subjected to fatigue loads. Acceleration and deflection measurements were taken directly from the beam.…”

Section: Multiresolution Classificationmentioning

confidence: 99%

Exploring indirect vehicle-bridge interaction for bridge SHM

Cerda

Garrett

Bielak

et al. 2010

Bridge Maintenance, Safety, Management and Life-Cycle Optimization

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“…Melhem and Kim [56] and Kim and Melhem [57,58] though non-trivial, can be helpful in characterizing the evolution of the extent damage in a structure in the time domain using this approach for damaged bridge -vehicle interaction.…”

Section: Distortion Of Wavelet Coefficient Mapsmentioning

confidence: 99%