Long-term monitoring study reveals mode-dependent vortex-induced vibrations across 24 bridge stay cables, indicating potential damping degradation in symmetric structures.
Key Points
To establish an automated batch processing framework for continuous identification and characteristic analysis of vortex-induced vibrations (VIV) in bridge stay cables using long-term monitoring data.
Developed an automated batch framework to extract and analyze continuous vibration data.
Applied the framework to evaluate one-year monitoring datasets across 24 stay cables in an operational cable-stayed bridge under varying wind conditions.
Long cables exhibited significantly higher frequency and larger amplitude VIV dominated by high-order modes, whereas short cables primarily experienced low-order VIV.
Vibration occurrences and amplitudes varied markedly even between symmetrically positioned stay cables, suggesting localized degradation in damping systems.