Journal of Tongji University(Natural Science), Volume. 53, Issue 7, 1026(2025)

Design Method for Aeroelastic Models of Suspension Bridges Based on Multi-Steel Beam Frame System

LAN Yizhe1, GE Yaojun1,2, ZHANG Jinjie1, and YANG Yongxin1,2、*
Author Affiliations
  • 1State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
  • 2Key Laboratory of Transport Industry of Wind Resistant Technology for Bridge Structures, Tongji University, Shanghai 200092, China
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    For long span double-deck suspension bridges with steel truss girder, a new aeroelastic model design method is proposed, referred to as the multi-steel beam frame system (MSBFS), which comprises upper and lower steel beams, horizontal connecting rigid beams, and vertical rigid columns. By transforming the design process into an optimization problem and employing the constrained pattern search method, the design variables for the stiffening beam satisfying the design criteria are obtained. The sensitivity analysis reveals that the modal frequencies are significantly influenced by the dimensions of the horizontal connecting rigid beams, as well as the upper and lower longitudinal steel beams. The dynamic characteristic test results confirm the accuracy of the MSBFS, as the deviation in low-order modal frequencies from the design target values falls within ±5%. As a valuable complement to the full-bridge aeroelastic model design approaches, this design method is well-suited for truss girders, enabling an overall optimal simulation of aerodynamic shape, stiffness and mass system.

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    LAN Yizhe, GE Yaojun, ZHANG Jinjie, YANG Yongxin. Design Method for Aeroelastic Models of Suspension Bridges Based on Multi-Steel Beam Frame System[J]. Journal of Tongji University(Natural Science), 2025, 53(7): 1026

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    Paper Information

    Received: Nov. 21, 2023

    Accepted: Aug. 26, 2025

    Published Online: Aug. 26, 2025

    The Author Email: YANG Yongxin (yang_y_x@tongji.edu.cn)

    DOI:10.11908/j.issn.0253-374x.23413

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