Fretting fatigue tests and microstructure analysis of bridge stay cable wires

Saddle systems are a popular method for supporting the cables at the pylons of cable‐stayed bridges. Fretting fatigue failure of bridge stay cables is a major design consideration for saddle systems. Current design provisions require large‐scale tests of these anchoring systems. However, such tests...

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Bibliographic Details
Published in:Fatigue & fracture of engineering materials & structures 2023-09, Vol.46 (9), p.3145-3160
Main Authors: Chehrazi, Ali, Liang, Wanhua, Huda, Nazmul, Walbridge, Scott
Format: Article
Language:English
Subjects:
bridge cables
Bridge failure
Cable-stayed bridges
Cables
Defects
Fatigue failure
Fatigue life
Fatigue tests
fretting fatigue
Galvanizing
Material properties
Microstructure
Pylons
saddle supports
steel wires
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Summary:Saddle systems are a popular method for supporting the cables at the pylons of cable‐stayed bridges. Fretting fatigue failure of bridge stay cables is a major design consideration for saddle systems. Current design provisions require large‐scale tests of these anchoring systems. However, such tests are costly and time‐consuming. With this in mind, the current paper presents a small‐scale fretting fatigue setup to evaluate the fretting fatigue behavior of bridge stay cable wires at saddle supports. In this paper, fretting tests are conducted on bare and galvanized wires. Hourglass samples are then used to evaluate the material properties and plain fatigue performance of the studied wires. Finally, the microstructure of the wires is evaluated, and the influence of defects on the fretting fatigue life of the wires is discussed. Highlights A small‐scale fretting fatigue test setup for bridge stay cable wires is designed. Fatigue and fretting fatigue performance of bare and galvanized wires are evaluated. The microstructure and properties of two typical bridge cable wires are explored. The effects of defects on fatigue and fretting fatigue life of wires are discussed.
ISSN:8756-758X
1460-2695
DOI:10.1111/ffe.14064