Extreme Response of a Sea-Crossing Bridge Tower under Correlated Wind and Waves
Publication: Journal of Aerospace Engineering
Volume 32, Issue 6
Abstract
This numerical study focuses on the extreme response of a sea-crossing bridge tower under correlated wind and waves in order to predict structural response with sufficient accuracy. The wind and wave data were obtained by field measurements, and different copula models were compared by Akaike information criterion (AIC), under which the optimal model was selected to simulate the correlation of wind and wave parameters. The fluctuating wind considering multipoint correlation was then simulated by a spectral representation model (SRM), and the random wave considering pile group was generated by a linear superposition method. After verifying the reliability of the numerical method by comparison with an experiment case, dynamic responses of the bridge tower in the freestanding status under directional extreme wind and wave loads are carefully discussed. Furthermore, the response surface method (RSM) is proposed to improve computational efficiency and systematically evaluate the dynamic behavior of the bridge tower. The results show that the response of the bridge tower is highly sensitive to the load direction of wind and waves. The response contours indicate that the tower top displacement is mainly dominated by wind loads, but the base shear is dominated by wave loads.
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Acknowledgments
This work was supported financially by the National Natural Science Foundation of China (Grant No. 51525804) and the Sichuan Province Youth Science and Technology Innovation Team (2015TD0004).
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Published In
Journal of Aerospace Engineering
Volume 32 • Issue 6 • November 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Aug 28, 2018
Accepted: May 21, 2019
Published online: Jul 31, 2019
Published in print: Nov 1, 2019
Discussion open until: Dec 31, 2019
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