Stochastic Response of a Coastal Cable-Stayed Bridge Subjected to Correlated Wind and Waves
Publication: Journal of Bridge Engineering
Volume 23, Issue 12
Abstract
The influences of waves and wind–wave correlations on the stochastic buffeting response of a coastal cable-stayed bridge were studied using the pseudo-excitation method. The mean correlation coefficient of the wind-induced wave energy and measured wave energy was obtained by combining theoretical analysis with measured data to consider the wind–wave correlations. A statistical model was proposed to establish the relationship among the wind velocity, wave height, and wind-induced wave energy contribution rate. A joint probability distribution model of wind and waves was used with the Frank copula function to ensure the wind velocity and wave height. Methods to analyze the stochastic response of a cable-stayed bridge subjected to wind and wave loads with a power spectrum of correlated wind and waves were introduced, and a numerical study was conducted. The results showed that wave loads played an important role in the internal forces of underwater structures. Wind–wave correlations had a significant influence, which varied with the water depth, on the stochastic buffeting response.
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Acknowledgments
This study was supported by the National Basic Research Program (973 Program) of China (Grant 2011CB013606) and the National Natural Science Foundation of China (Grant 51378343). The authors acknowledge the support of the NOAA and NDBC for providing the data used in this study.
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Published In
Journal of Bridge Engineering
Volume 23 • Issue 12 • December 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Jan 31, 2018
Accepted: May 31, 2018
Published online: Sep 19, 2018
Published in print: Dec 1, 2018
Discussion open until: Feb 19, 2019
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