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Effects of Secondary Elements on Vortex-Induced Vibration of a Streamlined Box Girder
https://orcid.org/http://orcid.org/0000-0002-4550-9914
https://orcid.org/http://orcid.org/0000-0001-9285-4940
https://orcid.org/http://orcid.org/0000-0001-9879-0626
https://orcid.org/http://orcid.org/0000-0002-6850-5043
Box girders are aerodynamically favorable, and the paper presents a study on the vortex-induced vibration (VIV) of this girder type at large angles of attack. Taking a box girder as an example, the form of the guardrails and the position of the maintenance tracks were improved to increase the VIV performance. The aerodynamic mechanism was further investigated according to the change in flow field around the girder. Results showed that the VIV performance of the box girder at positive angles of attack is worse. Improving secondary elements is an effective way to increase the VIV performance. Adding four rectangle bars above the original guardrails could achieve the target by preventing the generation of the vortex and blocking its movement. Moving the maintenance tracks inwards with a reasonable distance could also achieve the target as the flow passes through the girder more smoothly. With the combination of the optimal form of the guardrails and the optimal position of the maintenance tracks, the VIV performance of the bridge is higher. The countermeasures provide reference for the inhibition of the VIV of box girders.
Effects of Secondary Elements on Vortex-Induced Vibration of a Streamlined Box Girder
https://orcid.org/http://orcid.org/0000-0002-4550-9914
https://orcid.org/http://orcid.org/0000-0001-9285-4940
https://orcid.org/http://orcid.org/0000-0001-9879-0626
https://orcid.org/http://orcid.org/0000-0002-6850-5043
Box girders are aerodynamically favorable, and the paper presents a study on the vortex-induced vibration (VIV) of this girder type at large angles of attack. Taking a box girder as an example, the form of the guardrails and the position of the maintenance tracks were improved to increase the VIV performance. The aerodynamic mechanism was further investigated according to the change in flow field around the girder. Results showed that the VIV performance of the box girder at positive angles of attack is worse. Improving secondary elements is an effective way to increase the VIV performance. Adding four rectangle bars above the original guardrails could achieve the target by preventing the generation of the vortex and blocking its movement. Moving the maintenance tracks inwards with a reasonable distance could also achieve the target as the flow passes through the girder more smoothly. With the combination of the optimal form of the guardrails and the optimal position of the maintenance tracks, the VIV performance of the bridge is higher. The countermeasures provide reference for the inhibition of the VIV of box girders.
Effects of Secondary Elements on Vortex-Induced Vibration of a Streamlined Box Girder
https://orcid.org/http://orcid.org/0000-0002-4550-9914
https://orcid.org/http://orcid.org/0000-0001-9285-4940
https://orcid.org/http://orcid.org/0000-0001-9879-0626
https://orcid.org/http://orcid.org/0000-0002-6850-5043
Box girders are aerodynamically favorable, and the paper presents a study on the vortex-induced vibration (VIV) of this girder type at large angles of attack. Taking a box girder as an example, the form of the guardrails and the position of the maintenance tracks were improved to increase the VIV performance. The aerodynamic mechanism was further investigated according to the change in flow field around the girder. Results showed that the VIV performance of the box girder at positive angles of attack is worse. Improving secondary elements is an effective way to increase the VIV performance. Adding four rectangle bars above the original guardrails could achieve the target by preventing the generation of the vortex and blocking its movement. Moving the maintenance tracks inwards with a reasonable distance could also achieve the target as the flow passes through the girder more smoothly. With the combination of the optimal form of the guardrails and the optimal position of the maintenance tracks, the VIV performance of the bridge is higher. The countermeasures provide reference for the inhibition of the VIV of box girders.
Effects of Secondary Elements on Vortex-Induced Vibration of a Streamlined Box Girder
KSCE J Civ Eng
Chen, Xingyu (author) / Qiu, Fang (author) / Tang, Haojun (author) / Li, Yongle (author) / Xu, Xinyu (author)
KSCE Journal of Civil Engineering ; 25 ; 173-184
2021-01-01
12 pages
Article (Journal)
Electronic Resource
English
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