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Identification of Cable Forces on Cable-Stayed Bridges: A Novel Application of the MUSIC Algorithm

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Abstract

Proper identification of the cable’s resonant frequencies is critical to provide an accurate estimate of cable force. The MUltiple SIgnal Classification (MUSIC) algorithm is implemented to estimate cable-stayed bridge cable tensions noninvasively from measured cable motion. This algorithm performs eigenanalysis on the data sequence to estimate and eliminate noise contributions before creating its frequency spectrum, providing a more robust estimation approach than traditional Fourier based frequency spectrums. To aid in the selection of cable frequencies, a comprehensive finite difference cable model is simulated and compared to the estimated MUSIC spectrums.

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Acknowledgements

The work presented here has been conducted by the University of Cincinnati Infrastructure Institute (UCII) under the auspices of the Ohio Department of Transportation (ODOT) and the authors would like to acknowledge this support in regards to testing the stays of the Ulysses S. Grant Bridge.

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Correspondence to S. Kangas.

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Kangas, S., Helmicki, A., Hunt, V. et al. Identification of Cable Forces on Cable-Stayed Bridges: A Novel Application of the MUSIC Algorithm. Exp Mech 50, 957–968 (2010). https://doi.org/10.1007/s11340-009-9263-4

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  • DOI: https://doi.org/10.1007/s11340-009-9263-4

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