Effect and mechanism of stiffness distribution and sag-span ratio of main cables on structural dynamic characteristics and flutter performance of multi-cable suspension bridges

By incorporating extra load-carrying main cables, multi-cable suspension bridges provide increased flexibility in adjusting structural dynamic characteristics, and new possible solutions to the flutter instability problem of long-span bridges. Based on a multi-cable suspension bridge, this paper presents a particular insight into the dynamic characteristics which was contrast with double-cable suspension bridge. Furthermore, the influence of stiffness distribution and sag-span ratio of main cables on the dynamic characteristics was also studied. It is shown that due to the different contribution of the main cables, multi-cable suspension bridge has various torsional modes with similar vibration shapes of the stiffening girder, which is quite different from double-cable suspension bridge. Changes in stiffness distribution of main cables also have significant effects on the form of these torsional modes. On this basis, the flutter performance of multi-cable suspension bridge is studied by modality-driven method. The results indicate that the flutter critical wind speed increases with the increase of sag-span ratio and stiffness ratio of inner and outer main cables, and multi-cable suspension bridge can obtain better flutter performance than double-cable suspension bridge with appropriate stiffness distribution. The change of stiffness distribution and sag-span ratio may lead to the transition of flutter dominant mode.

• Record URL:
  • https://doi.org/10.1016/j.jweia.2024.105919
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0167610524002824
• 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:
  • Shi, Yunliang
  • Yang, Yongxin
  • Zhu, Jinbo
  • Zhang, Jinjie
• Publication Date: 2024-11

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 105919
• Serial:
  • Journal of Wind Engineering & Industrial Aerodynamics
  • Volume: 254
  • 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: Bridge cables; Flutter; Long span; Stiffness; Suspension bridges
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 01935569
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 30 2024 5:16PM