Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures
In order to study the flutter of long-span pedestrian suspension bridge and its aerodynamic control, a 420m-span pedestrian suspension bridge is used as an engineering example, the wind-induced vibration of seven particular aerodynamic sections is studied by wind tunnel tests, and the soft flutter p...
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MDPI AG
2022-08-01
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| Col·lecció: | Buildings |
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| Accés en línia: | https://www.mdpi.com/2075-5309/12/8/1173 |
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| author | Qinghai Guan Lei Liu Hui Gao Yujing Wang Jiawu Li |
| author_facet | Qinghai Guan Lei Liu Hui Gao Yujing Wang Jiawu Li |
| author_sort | Qinghai Guan |
| collection | DOAJ |
| description | In order to study the flutter of long-span pedestrian suspension bridge and its aerodynamic control, a 420m-span pedestrian suspension bridge is used as an engineering example, the wind-induced vibration of seven particular aerodynamic sections is studied by wind tunnel tests, and the soft flutter phenomenon of two kinds of aerodynamic sections is identified. The results show that the wind fairing and the wind-retaining plate measures are not necessarily effective measures to improve the wind-induced stability of long-span pedestrian suspension bridge, as these two measures may reduce the flutter stability: the wind fairing section in the positive angle of attack is prone to torsion-based soft flutter phenomenon, in which the vertical vibration spectrum contains multiple vibration frequencies, so the conventional formulation of the linearized self-excited forces is no longer satisfied; the wind-retaining plate section in the negative angle of attack is prone to soft flutter dominated by vertical vibration, and the beat vibration phenomenon is found in the torsional vibration time history of the wind-retaining section. Slotting in the center of the girder section can significantly change the flow state of the section, which is an effective measure to improve the flutter stability of the pedestrian suspension bridge. |
| first_indexed | 2024-03-09T04:39:00Z |
| format | Article |
| id | doaj.art-5d439d4f8e29438095312a51315abebe |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-09T04:39:00Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-5d439d4f8e29438095312a51315abebe2023-12-03T13:23:52ZengMDPI AGBuildings2075-53092022-08-01128117310.3390/buildings12081173Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic MeasuresQinghai Guan0Lei Liu1Hui Gao2Yujing Wang3Jiawu Li4School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, ChinaTianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin Chengjian University, Tianjin 300384, ChinaDepartment of Civil Engineering, Ordos Institute of Technology, Ordos 017000, ChinaSchool of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, ChinaWind Tunnel Laboratory, Chang’an University, Xi’an 710064, ChinaIn order to study the flutter of long-span pedestrian suspension bridge and its aerodynamic control, a 420m-span pedestrian suspension bridge is used as an engineering example, the wind-induced vibration of seven particular aerodynamic sections is studied by wind tunnel tests, and the soft flutter phenomenon of two kinds of aerodynamic sections is identified. The results show that the wind fairing and the wind-retaining plate measures are not necessarily effective measures to improve the wind-induced stability of long-span pedestrian suspension bridge, as these two measures may reduce the flutter stability: the wind fairing section in the positive angle of attack is prone to torsion-based soft flutter phenomenon, in which the vertical vibration spectrum contains multiple vibration frequencies, so the conventional formulation of the linearized self-excited forces is no longer satisfied; the wind-retaining plate section in the negative angle of attack is prone to soft flutter dominated by vertical vibration, and the beat vibration phenomenon is found in the torsional vibration time history of the wind-retaining section. Slotting in the center of the girder section can significantly change the flow state of the section, which is an effective measure to improve the flutter stability of the pedestrian suspension bridge.https://www.mdpi.com/2075-5309/12/8/1173aerodynamic measurelong-span pedestrian suspension bridgesoft flutter identificationwind tunnel test |
| spellingShingle | Qinghai Guan Lei Liu Hui Gao Yujing Wang Jiawu Li Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures Buildings aerodynamic measure long-span pedestrian suspension bridge soft flutter identification wind tunnel test |
| title | Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures |
| title_full | Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures |
| title_fullStr | Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures |
| title_full_unstemmed | Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures |
| title_short | Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures |
| title_sort | research on soft flutter of 420m span pedestrian suspension bridge and its aerodynamic measures |
| topic | aerodynamic measure long-span pedestrian suspension bridge soft flutter identification wind tunnel test |
| url | https://www.mdpi.com/2075-5309/12/8/1173 |
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