Fatigue Test on Integral Joint of the Main Truss of the Baling River Bridge

Abstract:

The Baling River Bridge is a single-span simply-supported suspension bridge with a main span of 1088 m. The steel stiffening truss is employed as its main girder and comprises the integral joints connecting the chord members. The integral joint is a key structure and determines the safety of the bridge, but it is very complex in detail and has an undefined fatigue resistance. In order to investigate its mechanical behavior and fatigue reliability, a fatigue test was performed on a 1:1.4 scale model of the integral joint of the main truss of the Bridge. With an assumption of the load spectra represented by the standard fatigue vehicle in BS 5400, the test fatigue load was derived accounting for the multiple vehicle effect and the model scale. The test result shows that no cracks were detected in the model when subjected to two million stress range cycles, and the structure has an reliable fatigue resistance satisfying the design requirement. This type of integral joint is an alternative for long-span truss bridges.

• Periodical: Key Engineering Materials (Volumes 417-418)
• Pages: 481-484
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.417-418.481
• Online since: October 2009
• Authors: Gao Liu, Wen Ming Wu, Liang Tang, Tian Liang Wang
• Keywords: Fatigue, Integral Joint, Load, Main Truss, Suspension Bridge, Test

References

[1] JTJ 025-86 Steel and wood structure design code for highway bridge. (in Chinese).

[2] BS 5400-10 1980 Steel, concrete and composite bridges - Code of practice for fatigue.

[3] Q. Li, L. Tang, M.S. Pei, et al. Highway, 2004, (12): 7-10. (in Chinese).

[4] H. Man, Q. Li, L. Tang. Bridge Construction, 2007, (3): 13-16. (in Chinese).