Experimental study on the influence of maintenance track position on vortex-induced vibration performance of a box girder suspension bridge
To study the influence of maintenance track on the vortex-induced vibration (VIV) performance of main girder, the VIV response and time history of surface pressure data of a section model were obtained by wind tunnel vibration and pressure measurements for a large-span steel box girder suspension br...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-10-01
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| Series: | Frontiers in Built Environment |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fbuil.2023.1264996/full |
| _version_ | 1797667760483860480 |
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| author | Chunguang Li Hubin Yan Minhao Zou Yan Han C. S. Cai Long Wang |
| author_facet | Chunguang Li Hubin Yan Minhao Zou Yan Han C. S. Cai Long Wang |
| author_sort | Chunguang Li |
| collection | DOAJ |
| description | To study the influence of maintenance track on the vortex-induced vibration (VIV) performance of main girder, the VIV response and time history of surface pressure data of a section model were obtained by wind tunnel vibration and pressure measurements for a large-span steel box girder suspension bridge. The VIV performance of the main girder was tested at ±5° attack angles of various maintenance track positions, including 1, 2.5, and 5 m away from the outer edge of the girder bottom plate. The mean values, root variances and amplitude spectra of vortex-induced force and the correlation and contribution coefficients of local aerodynamic force to overall aerodynamic force were analyzed. The results show that when the maintenance track is 1 m away from the outer edge of the bottom plate, the main girder exhibits the worst VIV performance with a maximum amplitude of 0.457 m, far beyond the allowable value of the specification. The VIV performance of the main girder was greatly improved by moving the maintenance track inward. The pressure analysis indicates that the large pressure fluctuation at the front and rear parts of the upper surface is attributed to the strong VIV of the main girder. In this sense, the improved VIV performance is mainly contributed by the weakening of pressure fluctuation in these two areas and the reduced local aerodynamic force. When the distance between the maintenance track and bottom plate is adjusted to 2.5 m, a 3.5 m wind barrier with a ventilation rate of 30% effectively inhibits the VIV of the box girder. The main reason for the suppression is that the elimination of pressure fluctuation on the upper surface of the girder disturbs the correlation between local aerodynamic force and overall aerodynamic force, consequently diminishing the contribution of local aerodynamic force to the vortex-induced force. |
| first_indexed | 2024-03-11T20:19:10Z |
| format | Article |
| id | doaj.art-307938bd95e84da09b6b60b2c19ae036 |
| institution | Directory Open Access Journal |
| issn | 2297-3362 |
| language | English |
| last_indexed | 2024-03-11T20:19:10Z |
| publishDate | 2023-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Built Environment |
| spelling | doaj.art-307938bd95e84da09b6b60b2c19ae0362023-10-03T08:58:36ZengFrontiers Media S.A.Frontiers in Built Environment2297-33622023-10-01910.3389/fbuil.2023.12649961264996Experimental study on the influence of maintenance track position on vortex-induced vibration performance of a box girder suspension bridgeChunguang Li0Hubin Yan1Minhao Zou2Yan Han3C. S. Cai4Long Wang5School of Civil Engineering, Changsha University of Science and Technology, Changsha, Hunan, ChinaSchool of Civil Engineering, Changsha University of Science and Technology, Changsha, Hunan, ChinaSchool of Civil Engineering, Changsha University of Science and Technology, Changsha, Hunan, ChinaSchool of Civil Engineering, Changsha University of Science and Technology, Changsha, Hunan, ChinaDepartment of Bridge Engineering, School of Transportation, Southeast University, Nanjing, ChinaSchool of Civil Engineering, Changsha University of Science and Technology, Changsha, Hunan, ChinaTo study the influence of maintenance track on the vortex-induced vibration (VIV) performance of main girder, the VIV response and time history of surface pressure data of a section model were obtained by wind tunnel vibration and pressure measurements for a large-span steel box girder suspension bridge. The VIV performance of the main girder was tested at ±5° attack angles of various maintenance track positions, including 1, 2.5, and 5 m away from the outer edge of the girder bottom plate. The mean values, root variances and amplitude spectra of vortex-induced force and the correlation and contribution coefficients of local aerodynamic force to overall aerodynamic force were analyzed. The results show that when the maintenance track is 1 m away from the outer edge of the bottom plate, the main girder exhibits the worst VIV performance with a maximum amplitude of 0.457 m, far beyond the allowable value of the specification. The VIV performance of the main girder was greatly improved by moving the maintenance track inward. The pressure analysis indicates that the large pressure fluctuation at the front and rear parts of the upper surface is attributed to the strong VIV of the main girder. In this sense, the improved VIV performance is mainly contributed by the weakening of pressure fluctuation in these two areas and the reduced local aerodynamic force. When the distance between the maintenance track and bottom plate is adjusted to 2.5 m, a 3.5 m wind barrier with a ventilation rate of 30% effectively inhibits the VIV of the box girder. The main reason for the suppression is that the elimination of pressure fluctuation on the upper surface of the girder disturbs the correlation between local aerodynamic force and overall aerodynamic force, consequently diminishing the contribution of local aerodynamic force to the vortex-induced force.https://www.frontiersin.org/articles/10.3389/fbuil.2023.1264996/fullmaintenance trackvortex-induced vibration performancesteel box girderwind tunnel testmechanism analysis |
| spellingShingle | Chunguang Li Hubin Yan Minhao Zou Yan Han C. S. Cai Long Wang Experimental study on the influence of maintenance track position on vortex-induced vibration performance of a box girder suspension bridge Frontiers in Built Environment maintenance track vortex-induced vibration performance steel box girder wind tunnel test mechanism analysis |
| title | Experimental study on the influence of maintenance track position on vortex-induced vibration performance of a box girder suspension bridge |
| title_full | Experimental study on the influence of maintenance track position on vortex-induced vibration performance of a box girder suspension bridge |
| title_fullStr | Experimental study on the influence of maintenance track position on vortex-induced vibration performance of a box girder suspension bridge |
| title_full_unstemmed | Experimental study on the influence of maintenance track position on vortex-induced vibration performance of a box girder suspension bridge |
| title_short | Experimental study on the influence of maintenance track position on vortex-induced vibration performance of a box girder suspension bridge |
| title_sort | experimental study on the influence of maintenance track position on vortex induced vibration performance of a box girder suspension bridge |
| topic | maintenance track vortex-induced vibration performance steel box girder wind tunnel test mechanism analysis |
| url | https://www.frontiersin.org/articles/10.3389/fbuil.2023.1264996/full |
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