Quantifying the aerodynamic admittance and spanwise coherence functions of buffeting lift for bridge decks through the measurement of segmental forces

The assessment of buffeting response of long span bridges relies significantly on the aerodynamic admittance and spanwise coherence functions of buffeting forces acting on bridge decks. This study presents a novel approach to derive admittance and coherence functions of buffeting lift on bridge decks, utilizing wind tunnel measurement of forces on spanwise distributed segments. The approach is developed by establishing connections of the power spectrum and coherence function of segmental lift with the admittance and coherence functions of strip lift. This study also explores the direct estimation of the generalized buffeting forces on long span bridges from the segmental force, eliminating the need of extracting admittance and coherence functions of strip force. The methodology is firstly validated for a thin plate with theoretical force information, follow by its application to a twin-box bridge deck using wind tunnel data. The investigation assesses the influence of a pre-assumed coherence model on the identified admittance and coherence functions and its consequential impact on the generalized buffeting forces of long span bridges. The proposed approach offers a practical and efficient means to quantify buffeting forces acting on bridge decks with intricate configurations, such as truss sections, where surface pressure measurement may pose challenges.

• Record URL:
  • https://doi.org/10.1016/j.jweia.2024.105872
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0167610524002356
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01676105
• Supplemental Notes:
  • © 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. Abstract reprinted with permission of Elsevier.
• Authors:
  • Jiang, Hongsheng
  • 0000-0001-9394-6484
  • Li, Shaopeng
  • 0000-0002-3009-957X
  • Chen, Xinzhong
  • 0000-0002-3384-7553
  • Li, Zhiyang
  • 0000-0002-6639-4271
• Publication Date: 2024-10

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 105872
• Serial:
  • Journal of Wind Engineering & Industrial Aerodynamics
  • Volume: 253
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0167-6105
  • Serial URL: https://www.sciencedirect.com/journal/journal-of-wind-engineering-and-industrial-aerodynamics

Subject/Index Terms

• TRT Terms: Aerodynamic force; Air pressure; Bridge decks; Long span bridges
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 01935570
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 30 2024 5:16PM