Theoretical estimation of rain–wind-induced vibrations of stay cables considering cable bending stiffness and axial pretension

https://doi.org/10.31130/ud-jst.2026.24(7B).593E

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Author

  • Hoang Trong Lam
    The University of Danang – University of Science and Technology, Vietnam
    Vo Duy Hung
    The University of Danang – University of Science and Technology, Vietnam
    Phan Duc Tam
    The University of Danang – University of Science and Technology, Vietnam
    Nguyen Van My
    The University of Danang – University of Science and Technology, Vietnam

Từ khóa:

RWIV
Stay cable
theoretical model
pretension
bending stiffness

Tóm tắt

Rain–wind-induced vibration (RWIV) may produce large-amplitude, low-frequency oscillations in stay cables under combined wind and rainfall. This study presents a simplified analytical framework for estimating RWIV while explicitly considering axial pretension, bending stiffness, cable geometry, structural damping, and rivulet-induced aerodynamic effects. Based on quasi-steady galloping theory, the aerodynamic force is formulated by incorporating the initial position and harmonic motion of a water rivulet. The governing equation of a tensioned cable is solved using modal decomposition. Parametric analyses show that the predicted vibration amplitude increases with cable length and diameter, whereas greater axial pretension and natural frequency reduce the response. Bending stiffness has only a minor influence within the investigated range, confirming the tension-dominated behavior of slender stay cables. Application to an assumed cable-stayed bridge demonstrates that considerable RWIV may occur under unfavorable wind–rain conditions and highlights the need to consider cable dynamic properties in preliminary vibration assessment.

Tài liệu tham khảo

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Jul 31, 2026
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Lam, H. T., V. D. Hung, P. D. Tam, và N. V. My. “Theoretical Estimation of rain–wind-Induced Vibrations of Stay Cables Considering Cable Bending Stiffness and Axial Pretension”. Tạp Chí Khoa học Và Công nghệ Đại học Đà Nẵng, vol 24, số p.h 7B, Tháng Bảy 2026, tr 142-8, doi:10.31130/ud-jst.2026.24(7B).593E.

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