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A Numerical Method for Conformal Mapping of Closed Box Girder Bridges and Its Application

Author

Listed:
  • Lianhuo Wu

    (Department of Bridge Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Zelin Zhou

    (China 19th Metallurgical Corporation, Chengdu 610031, China)

  • Jinxiang Zhang

    (Department of Bridge Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Mingjin Zhang

    (Department of Bridge Engineering, Southwest Jiaotong University, Chengdu 610031, China)

Abstract

Conformal mapping has achieved many successes in engineering. It can help to solve some complex fluid flow problems. This study proposed a numerical method for conformal mapping of closed box girder bridges and applied it to flutter performance prediction, which is crucial for ensuring the safety and sustainability of bridge structures. The characteristics of conformal mapping coefficients for the closed box were investigated. Thereafter, a numerical method through searching the conformal mapping coefficients was presented. The results show that the proposed numerical method has a smaller error in the existing research. The conformal mapping of six practical bridges agrees well with the closed box girder shapes, indicating the validity of the proposed method. The flutter prediction results by the proposed method are consistent with the wind tunnel test. The conformal mapping and flutter calculations took no more than ten seconds, showing high computing efficiency. This method is easier to understand and implement without complex mathematical derivation, which is helpful for the extensive application of conformal mapping in bridge engineering.

Suggested Citation

  • Lianhuo Wu & Zelin Zhou & Jinxiang Zhang & Mingjin Zhang, 2023. "A Numerical Method for Conformal Mapping of Closed Box Girder Bridges and Its Application," Sustainability, MDPI, vol. 15(7), pages 1-13, April.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:7:p:6291-:d:1117324
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    References listed on IDEAS

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    1. Chuanjie Cui & Rujin Ma & Xiaohong Hu & Wuchao He, 2019. "Vibration Analysis for Pendent Pedestrian Path of a Long-Span Extradosed Bridge," Sustainability, MDPI, vol. 11(17), pages 1-15, August.
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    Cited by:

    1. Zelin Zhou & Xu Xin & Jiaxin Yu & Maoyi Liu, 2023. "Analysis of Wind Field Characteristics of Ideal V-Shaped and U-Shaped Canyons," Sustainability, MDPI, vol. 15(13), pages 1-17, June.
    2. Lianhuo Wu & Mingjin Zhang & Fanying Jiang & Zelin Zhou & Yongle Li, 2023. "An Analytical Solution for Unsteady Aerodynamic Forces on Streamlined Box Girders with Coupled Vibration," Sustainability, MDPI, vol. 15(9), pages 1-14, April.

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