Effect of Web Inclination of Streamlined Flat Box Deck on Aerostatic Performance of a Bridge
Publication: Journal of Bridge Engineering
Volume 26, Issue 2
Abstract
The aerodynamic shape of the bridge deck has a significant influence on the wind resistance performance of the bridge, while the web inclination angle of the box deck plays a critical role in terms of the aerodynamic geometry. In order to investigate the effect of the web inclination angle on the aerostatic performance of the box deck and the aerostatic torsional divergence of the bridge, a series of web inclination angles (43 representative angles) were studied based on the computational fluid dynamics (CFD) method and the nonlinear aerostatic analysis. The results showed that there was a suction zone at the junction of the bottom slab and the inclined web when the angle of the web was small, which generated a downward force and decreased the lift coefficient of the box deck. It can also be concluded that the vertical and torsional displacements of the box deck under any wind speed were effectively reduced by reducing the web inclination angle, and selecting a box deck with a lower web inclination angle can reduce the lift coefficient and drag coefficient of the box deck. Consequently, it can well improve the aerostatic performance of the bridge.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (Grant No. 51778365).
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Published In
Journal of Bridge Engineering
Volume 26 • Issue 2 • February 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Feb 28, 2020
Accepted: Sep 10, 2020
Published online: Dec 10, 2020
Published in print: Feb 1, 2021
Discussion open until: May 10, 2021
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