Studies on Wind‐Induced Fatigue Performance of Spacer Considering Galloping of Iced Conductors in Tall and Large‐Span Transmission Tower‐Line System DOI Open Access
Kunjie Rong, Li Tian,

Xiaoyang Wang

et al.

The Structural Design of Tall and Special Buildings, Journal Year: 2025, Volume and Issue: 34(3)

Published: Feb. 11, 2025

ABSTRACT To investigate the influence of galloping on fatigue performance spacers in iced transmission lines, this study developed a coupled finite element model tower‐quad‐bundled conductor‐spacer, along with wind field for quad‐bundled and corresponding loads are generated. A analysis method is proposed, its life under conditions assessed. Moreover, thickness shape spacer analyzed. Results show that connected to interphase most prone damage during galloping. For crescent‐shaped iced, highest occurs at 10 mm thickness, 90° attack angle, m/s speed, an average about 20 days. Dangerous located middle phase conductor crescent, fan, D‐shaped unfavorable angles being 90°, 0°, 60°, 13.35, 21.66, 74.73 days, respectively. Spacer's increases peaking mm. Crescent‐shaped causes within 30°–120° angle range, followed by fan‐shaped iced. At 0° 150°, values similar all shapes, while results 180°.

Language: Английский

Buffeting response analysis and vibration damping strategies for steel truss arch bridges in the maximum cantilever state DOI
Jun Liu,

Hongzhi Li,

Di Xu

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(2)

Published: Feb. 1, 2025

To enhance wind resistance safety for construction personnel and structural integrity, this study investigates the buffeting response vibration damping measures of a steel truss stiffened arch bridge with main span 400 meters during its maximum cantilever state. A finite element model was developed, three-dimensional pulsating field simulated using harmonic synthesis method. Time-domain analysis applied to compute displacement responses at end rib top buckle tower. Numerical results were compared tunnel tests full-bridge under varying speeds, revealing similar patterns. At reference speed, predicted peak displacements 22.157 21.778 cm in lateral vertical directions end, 16.994 laterally tower top, deviations from 13.2%, 10.2%, 6.9%, respectively. mitigate these displacements, wind-resistant cables flexible connections analyzed. Lateral reduced by up 84.8% 61.0% while further 76.8%, ensuring enhanced safety. The agreement between numerical experimental validates proposed methods, providing strong basis design strategies large-span bridges.

Language: Английский

Citations

0
Studies on Wind‐Induced Fatigue Performance of Spacer Considering Galloping of Iced Conductors in Tall and Large‐Span Transmission Tower‐Line System DOI Open Access
Kunjie Rong, Li Tian,

Xiaoyang Wang

et al.

The Structural Design of Tall and Special Buildings, Journal Year: 2025, Volume and Issue: 34(3)

Published: Feb. 11, 2025

ABSTRACT To investigate the influence of galloping on fatigue performance spacers in iced transmission lines, this study developed a coupled finite element model tower‐quad‐bundled conductor‐spacer, along with wind field for quad‐bundled and corresponding loads are generated. A analysis method is proposed, its life under conditions assessed. Moreover, thickness shape spacer analyzed. Results show that connected to interphase most prone damage during galloping. For crescent‐shaped iced, highest occurs at 10 mm thickness, 90° attack angle, m/s speed, an average about 20 days. Dangerous located middle phase conductor crescent, fan, D‐shaped unfavorable angles being 90°, 0°, 60°, 13.35, 21.66, 74.73 days, respectively. Spacer's increases peaking mm. Crescent‐shaped causes within 30°–120° angle range, followed by fan‐shaped iced. At 0° 150°, values similar all shapes, while results 180°.

Language: Английский

Citations

0