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Numerical Study on the Mechanical Performance of a Flexible Arch Composite Bridge with Steel Truss Beams over Its Entire Lifespan

Author

Listed:
  • Ning Sun

    (School of Highway, Chang’an University, Xi’an 710064, China)

  • Xiaobo Zheng

    (School of Highway, Chang’an University, Xi’an 710064, China
    Shaanxi Institute of Teacher Development, Shaanxi Normal University, Xi’an 710062, China)

  • Yuan Li

    (School of Highway, Chang’an University, Xi’an 710064, China)

  • Yunlei Zhao

    (School of Highway, Chang’an University, Xi’an 710064, China)

  • Haoyun Yuan

    (CCCC Second Highway Engineering Co., Ltd., Xi’an 710065, China)

  • Mi Zhou

    (School of Highway, Chang’an University, Xi’an 710064, China)

Abstract

Steel truss–arch composite bridge systems are widely used in bridge engineering to provide sufficient space for double lanes. However, a lack of research exists on their mechanical performance throughout their lifespan, resulting in uncertainties regarding bearing capacity and the risk of bridge failure. This paper conducts a numerical study of the structural mechanical performance of a flexible arch composite bridge with steel truss beams throughout its lifespan to determine the critical components and their mechanical behavior. Critical vehicle loads are used to assess the bridge’s mechanical performance. The results show that the mechanical performance of the bridge changes significantly when the temporary piers and the bridge deck pavement are removed, substantially influencing the effects of the vehicle loads on the service life. The compressive axial force of the diagonal bar significantly increases to 33,101 kN near the supports during the two construction stages, and the axial force in the upper chord of the midspan increases by 4.1 times under a critical load. Moreover, the suspender tensions and maximum vertical displacement are probably larger than the limit of this bridge system in the service stage, and this is caused by the insufficient longitudinal bending stiffness of truss beams. Therefore, monitoring and inspection of critical members are necessary during the removal of temporary piers and bridge deck paving, and an appropriate design in steel truss beams is required to improve the life cycle assessment of this bridge system.

Suggested Citation

  • Ning Sun & Xiaobo Zheng & Yuan Li & Yunlei Zhao & Haoyun Yuan & Mi Zhou, 2024. "Numerical Study on the Mechanical Performance of a Flexible Arch Composite Bridge with Steel Truss Beams over Its Entire Lifespan," Sustainability, MDPI, vol. 16(14), pages 1-22, July.
  • Handle: RePEc:gam:jsusta:v:16:y:2024:i:14:p:6041-:d:1435615
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    References listed on IDEAS

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    1. Zhenlong Shen & Yongjian Liu & Jiang Liu & Zeyu Liu & Shi Han & Shiyong Lan, 2023. "A Decision-Making Method for Bridge Network Maintenance Based on Disease Transmission and NSGA-II," Sustainability, MDPI, vol. 15(6), pages 1-19, March.
    2. Han-Ming Zhang & Jing Chen & Zhuo-Qun Liu & Jian-Chun Xiao, 2023. "Optimization of Steel Consumption for Prestressed Spatial Arch-Supported Partial Single-Layer Reticulated Shells," Sustainability, MDPI, vol. 15(6), pages 1-20, March.
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