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This study systematicallyTwin-box bridge deck investigates the Aerodynamic Admittance FunctionsAerodynamic admittance function (AAFs) of twin-box decksTwin-box deck, whose complexity is heightened by a central gap, necessitating dedicated research. Three methodologies are compared: active wind tunnel testingWind tunnel testing and Large Eddy SimulationsLarge Eddy Simulation (LES) (LESLarge Eddy Simulation (LES)) using sinusoidal gusts and synthetic turbulenceTurbulence. The wind tunnel testsWind tunnel test, featuring an active gust generator, produce single-frequency vertical sinusoidal gusts to assess the impact of gap widths on AAFs. Concurrently, LESLarge Eddy Simulation (LES) provide insights into the differences in AAFs under various inflow conditionsInflow conditions. The results from these approaches show good agreement, occasionally exceeding the Sears function values. It’s also revealed that buffeting forces predominantly originate from the upstream deck, explaining the consistency between sinusoidal gust and broad-banded turbulent inflows.

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Experimental and Numerical Investigations on the Aerodynamic Admittance of Twin-Box Bridge Decks

  • 会议论文

  • 发表日期：

    2026年

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  • Weilin Li,
  • Xuejie Li,
  • Luca Patruno,
  • Huawei Niu,
  • Xugang Hua

摘要

This study systematicallyTwin-box bridge deck investigates the Aerodynamic Admittance FunctionsAerodynamic admittance function (AAFs) of twin-box decksTwin-box deck, whose complexity is heightened by a central gap, necessitating dedicated research. Three methodologies are compared: active wind tunnel testingWind tunnel testing and Large Eddy SimulationsLarge Eddy Simulation (LES) (LESLarge Eddy Simulation (LES)) using sinusoidal gusts and synthetic turbulenceTurbulence. The wind tunnel testsWind tunnel test, featuring an active gust generator, produce single-frequency vertical sinusoidal gusts to assess the impact of gap widths on AAFs. Concurrently, LESLarge Eddy Simulation (LES) provide insights into the differences in AAFs under various inflow conditionsInflow conditions. The results from these approaches show good agreement, occasionally exceeding the Sears function values. It’s also revealed that buffeting forces predominantly originate from the upstream deck, explaining the consistency between sinusoidal gust and broad-banded turbulent inflows.