Comparative Study on Buffeting Performance of Sutong Bridge Based on Design and Measured Spectrum
Publication: Journal of Bridge Engineering
Volume 18, Issue 7
Abstract
The recent development in structural health monitoring (SHM) technology enables the buffeting responses of bridges to be evaluated in a more realistic manner. In this paper, the buffeting responses of the cable-stayed Sutong Bridge with a main span of 1,088 m is analyzed with the wind spectra used in the design phase and those obtained experimentally from a long-term SHM system to compare the actual buffeting response with design predictions. The autospectra of longitudinal and vertical fluctuating wind components are derived from the in situ strong wind data recorded by the monitoring system. The buffeting analysis is accomplished in the time domain with the aeroelastic effect included. Compared with the buffeting responses obtained from the measured spectrum, the girder responses from the design spectrum are larger in the horizontal direction and smaller in other directions, whereas the tower responses are larger and thus relatively conservative.
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Acknowledgments
This work was supported by the Outstanding Youth Fund of the National Science Foundation of China (Grant No. 50725828), the National Science Foundation of China for Young Scholars (Grant No. 50908046), the Teaching and Scientific Research Fund for Excellent Young Teachers of Southeast University, and the Priority Academic Program Development Foundation of Jiangsu Higher Education Institutions. This support is gratefully acknowledged. The authors thank the fruitful work provided by the Construction Commanding Department of Jiangsu Provincial Yangtze River Highway Bridge and the Structural Health Monitoring Institute of Southeast University.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 18 • Issue 7 • July 2013
Pages: 587 - 600
Copyright
© 2013 American Society of Civil Engineers.
History
Received: May 12, 2011
Accepted: Mar 14, 2012
Published online: Mar 16, 2012
Published in print: Jul 1, 2013
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