Galloping vibration of stay cable installed with a rectangular lamp: Field observations and wind tunnel tests

An, Miao; Li, Shouying; Zhi-wen, Liu; Yan, Banfu; Li, Longan; Chen, Zhengqing

doi:10.1016/j.jweia.2021.104685

Cited by 15 publications

(14 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In consideration of the effect of the boundary layer near the bottom floor, the aerodynamic coefficients are numerically modified. It is worth noting that the clockwise rotation of the flow around the model is positive in this paper, which means that the upward movement of the model is positive, contrary to the model definition in some articles (An et al, 2021; Deng et al, 2021). The coefficient of galloping force is defined as follows…”

Section: Outline Of Wind Tunnel Testsmentioning

confidence: 64%

“…In the May of 2019, a large amplitude of cable vibration of the Kuimen bridge was observed after installing rectangular lamps on the stay cables. An et al (2021) successfully reproduced the vibration of the stay cables by using wind tunnel tests and found the mechanism of the cable vibration is galloping. In the August of 2020, similar rectangular lamps as the Kuimen bridge were also installed on the stay cables of the Kuipu bridge.…”

Section: Introductionmentioning

confidence: 94%

“…This indicates that the galloping critical wind velocity of Cable S17 should be the lowest one. Furthermore, it appears that the inclination angle has little effect on galloping critical wind velocity according to An et al (2021). Therefore, Cable S17 was taken as the background of this study.…”

Section: Outline Of the Kuipu Bridge And The Lamp Installationmentioning

confidence: 99%

“…After the installation of rectangular lamps, the stay cables of the Kuimen bridge in the Chongqing City of China experienced a large amplitude of galloping vibration in 2019 (An et al, 2021). An et al (2021) reproduced the galloping vibration of the stay cable in wind tunnel tests and found that the galloping critical wind velocity of the first mode of the longest stay cable was as low as 6.3 m/s. Li et al (2014) studied the influence of a circular-hoop lamp on the vibration of stay cables of the Hedong Bridge in Guangzhou City of China.…”

Section: Introductionmentioning

confidence: 99%

“…However, Hua et al (2020) found that increasing the damping ratio to 3.2% cannot effectively suppress the galloping of the main cable of a suspension bridge during construction. An et al (2021) studied the galloping of stay cables with rectangular lamps and found that the critical wind velocity of galloping vibration is still far lower than the design wind velocity when the damping ratio is up to 0.6%. The minimum damping required to suppress wind-induced vibrations varies for different cross sections and different types of vibrations.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effects of damping and helical fillets on galloping vibration of stay cable installed with a rectangular lamp

Chen

2023

Advances in Structural Engineering

View full text Add to dashboard Cite

Lamps attached on the stay cable can change the stable circular cross-section of the stay cable, which is easy to cause galloping vibration. Stay cables of the Kuipu bridge in the Fuzhou City of China were equipped with damper and helical fillets. After the installation of rectangular lamps on this bridge, no obvious vibration of the stay cables was observed. This is totally different from another bridge, the Kuimen bridge in the Chongqing City of China, which has been recently reported by the authors. The purpose of this study is to clarify the effects of the helical fillets and the structural damping on galloping vibration. The features of galloping vibration of the stay cable attached to a rectangular lamp were carefully studied, and the effectiveness of damping and helical fillets in reducing the galloping vibration was evaluated. First, the force measurement wind tunnel tests on the segmental test model were carried out, and the lift and drag coefficients of the stay cable attached to the rectangular lamp were measured. The dangerous wind attack angle of galloping vibration was predicted by the galloping force coefficient. Second, 3-dimensional vibration measurement wind tunnel tests were carried out to measure the wind-induced response of the cable-lamp test models. The variation of wind-induced response of stay cable with yaw angle and wind velocity was measured for test models with and without helical fillets. In the test, the features of wind-induced vibration were studied at the damping level of 0.1%, 0.6%, 0.7%, 0.8%, and 1.0%. According to Den Hartog’s theory, the minimum coefficient of galloping force is about −9.8. The experimental results of 3-dimensional vibration measurement wind tunnel tests show that the helical fillets wrapped on the cable surface can enhance the critical wind velocity to a certain extent, but the critical wind velocity is still far lower than the design wind velocity. When the damping ratio of the stay cable is up to 1.0% ( SC = 35.1), the galloping vibration of the stay cable attached to a rectangular lamp on the Kuipu Bridge can be effectively mitigated.

show abstract

Section: Outline Of Wind Tunnel Testsmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 94%

Section: Outline Of the Kuipu Bridge And The Lamp Installationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of damping and helical fillets on galloping vibration of stay cable installed with a rectangular lamp

Chen

2023

Advances in Structural Engineering

View full text Add to dashboard Cite

show abstract

Field observation and cause investigation of low-frequency cable vibrations in a cable-stayed bridge

Hwang,

Kim,

Lim

et al. 2025

Engineering Structures

View full text Add to dashboard Cite

Numerical simulations on cables attached with different shapes of lights and its mitigations by using perforated shrouds

An,

Wen,

et al. 2024

Physics of Fluids

View full text Add to dashboard Cite

To reduce the cable vibration caused by rectangular lights, the light shape is modified to be ellipsoidal and circular sections, together with the use of a perforated shroud. Numerical simulations on six types of cable-light models were conducted using computational fluid dynamics. The mean drag coefficient CD, mean and mean lift coefficient CL, mean of the ellipsoidal lights, circle lights, and perforated shroud cable are reduced compared to the rectangular light. CD, mean can be reduced by a maximum of 50%; CL, mean can be reduced by a maximum of 43%. The maximum fluctuating drag and lift coefficient are also significantly reduced. This indicates that the perforated shrouds might be useful to mitigate the vortex-induced vibration. The ellipsoidal and circular lights are significantly better than rectangular lights in terms of galloping critical wind speed. Furthermore, the perforated shroud is very beneficial for suppressing galloping vibration. The variation of Strouhal number St with the wind attack angle for the shroud rectangular light cable model is relatively smooth, all around 0.1. The wake vortices of rectangular light, ellipsoidal light, and circular light are shed alternately in a typical 2S pattern. However, the alternately shedding vortex of the shroud cable was interrupted by the flow of air through the holes. When the wind attack angle exceeds the most dangerous wind attack angle, the incoming stream cannot be reattached after separation, and the force on the cable is greatly reduced, resulting in a sudden drop in the average lift coefficient. Wind pressure in the gap between the shroud and the cable is negative. The fluctuating wind pressure coefficients on the shrouded cables are significantly lower than those of rectangular lights because of the interference effect of the outer perforated shrouds. In total, the perforated shroud is the best to reduce the galloping caused by the rectangular light.

show abstract

Galloping vibration of stay cable installed with a rectangular lamp: Field observations and wind tunnel tests

Cited by 15 publications

References 29 publications

Effects of damping and helical fillets on galloping vibration of stay cable installed with a rectangular lamp

Effects of damping and helical fillets on galloping vibration of stay cable installed with a rectangular lamp

Field observation and cause investigation of low-frequency cable vibrations in a cable-stayed bridge

Numerical simulations on cables attached with different shapes of lights and its mitigations by using perforated shrouds

Contact Info

Product

Resources

About