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Article

Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures

by 1,*, 2, 3,*, 1 and 4
1
School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, China
2
Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin Chengjian University, Tianjin 300384, China
3
Department of Civil Engineering, Ordos Institute of Technology, Ordos 017000, China
4
Wind Tunnel Laboratory, Chang’an University, Xi’an 710064, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Minshui Huang and Jianfeng Gu
Buildings 2022, 12(8), 1173; https://doi.org/10.3390/buildings12081173
Received: 28 June 2022 / Revised: 26 July 2022 / Accepted: 3 August 2022 / Published: 5 August 2022
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. View Full-Text
Keywords: aerodynamic measure; long-span pedestrian suspension bridge; soft flutter identification; wind tunnel test aerodynamic measure; long-span pedestrian suspension bridge; soft flutter identification; wind tunnel test
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MDPI and ACS Style

Guan, Q.; Liu, L.; Gao, H.; Wang, Y.; Li, J. Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures. Buildings 2022, 12, 1173. https://doi.org/10.3390/buildings12081173

AMA Style

Guan Q, Liu L, Gao H, Wang Y, Li J. Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures. Buildings. 2022; 12(8):1173. https://doi.org/10.3390/buildings12081173

Chicago/Turabian Style

Guan, Qinghai, Lei Liu, Hui Gao, Yujing Wang, and Jiawu Li. 2022. "Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures" Buildings 12, no. 8: 1173. https://doi.org/10.3390/buildings12081173

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