An Advanced Approach to Determining the Spanwise Coherence of the Buffeting Forces on Bridge Decks with Complex Configurations
Publication: Journal of Bridge Engineering
Volume 28, Issue 11
Abstract
The spanwise coherence of aerodynamic forces on a strip section is vital to evaluate the buffeting response of large-span bridges. However, when employing the commonly used pressure measurement technique, it is difficult to obtain the buffeting force coherence of bridge decks with complex configurations. This paper aims to propose an approach to determining the buffeting force coherence of a strip section using the force measurement technique. The key to this approach is the transformation of the coherence of buffeting forces from segment models to strip sections. Based on the two-wavenumber buffeting analysis theory, the relationship between the coherence of a strip section and a segment model is elaborated theoretically. The influences of the aspect ratio (δ) and the ratio of the integral scale to half the model’s width (Lw/b) on buffeting lift coherence were investigated. Force and pressure measurement tests are conducted on a typical streamlined bridge deck to validate the proposed approach. The results show that the buffeting lift coherence of a segment model is much stronger than that on a strip section. An increase in δ or Lw/b can, respectively, enhance the buffeting lift coherence at low wavenumbers or high wavenumbers. The wind tunnel test results demonstrate that the proposed approach is feasible and reliable and can be easily utilized to identify the buffeting force coherence of a bridge deck with a complex configuration.
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Data Availability Statement
All test data and analytical models that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The research described in this paper was financially supported by the National Natural Science Foundation under Grant Numbers 52308530, 52008357, and 52178508.
Author contributions: Yongfu Lei: Methodology, Software, Writing—original draft. Ming Li: Conceptualization, Methodology, Writing—review and editing. Hao Zhang: Investigation. Yang Yang: Funding acquisition, Validation. Yanguo Sun: Funding acquisition, Validation. Mingshui Li: Funding acquisition, Supervision.
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Published In
Journal of Bridge Engineering
Volume 28 • Issue 11 • November 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 26, 2022
Accepted: Jul 18, 2023
Published online: Sep 8, 2023
Published in print: Nov 1, 2023
Discussion open until: Feb 8, 2024
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