Research on Mechanism of Vortex-Induced Vibration Railing Effect of Double-Deck Large-Span Suspension Bridge

Large-span suspension bridges are susceptible to wind loads. Therefore, a more precise analysis of their wind-induced vibration response is necessary to ensure the structure’s absolute safety. This investigation conducted wind tunnel tests for the construction and completion stages to reveal the vor...

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Main Authors: Gang Yao, Yuxiao Chen, Yang Yang, Yuanlin Zheng, Linjun Wu, Hongbo Du
Format: Article
Language:English
Published: MDPI AG 2023-08-01
Series:Applied Sciences
Subjects:
Online Access:https://www.mdpi.com/2076-3417/13/16/9314
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author Gang Yao
Yuxiao Chen
Yang Yang
Yuanlin Zheng
Linjun Wu
Hongbo Du
author_facet Gang Yao
Yuxiao Chen
Yang Yang
Yuanlin Zheng
Linjun Wu
Hongbo Du
author_sort Gang Yao
collection DOAJ
description Large-span suspension bridges are susceptible to wind loads. Therefore, a more precise analysis of their wind-induced vibration response is necessary to ensure the structure’s absolute safety. This investigation conducted wind tunnel tests for the construction and completion stages to reveal the vortex-induced vibration (VIV) phenomenon of a double-deck suspension bridge. The results showed that no VIV occurred during the construction stage. However, the inclusion of railings significantly deteriorated the aerodynamic performance of the suspension bridge, leading to significant VIV at +3° and +5° wind angles of attack. Additionally, reducing the railing ventilation rate can significantly suppress the VIV amplitude. A new analysis method based on computational fluid dynamics (CFD) simulation is proposed to investigate the VIV mechanism of the double-deck truss girder. Twenty-nine measurement points were used to explore the vortex that causes VIV. The numerical simulations found that the area above and aft of the upper deck dominated the vertical VIV, while the aft of the lower deck dominated the torsional VIV. Furthermore, the intensity of the vortex in these areas was significantly lower during the construction stage. Moreover, reducing the railing ventilation rate significantly suppresses the torsional VIV by reducing the intensity of the vortex in the region behind the lower deck.
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spelling doaj.art-a5104f4951dc4adba373a6fdd282bf012023-11-19T00:07:49ZengMDPI AGApplied Sciences2076-34172023-08-011316931410.3390/app13169314Research on Mechanism of Vortex-Induced Vibration Railing Effect of Double-Deck Large-Span Suspension BridgeGang Yao0Yuxiao Chen1Yang Yang2Yuanlin Zheng3Linjun Wu4Hongbo Du5Key Laboratory of New Technology for Construction of Cities in Mountain Area, School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaKey Laboratory of New Technology for Construction of Cities in Mountain Area, School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaKey Laboratory of New Technology for Construction of Cities in Mountain Area, School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaChongqing City Infrastructure Construction Investment Co., Ltd., Chongqing 400014, ChinaKey Laboratory of New Technology for Construction of Cities in Mountain Area, School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaKey Laboratory of New Technology for Construction of Cities in Mountain Area, School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaLarge-span suspension bridges are susceptible to wind loads. Therefore, a more precise analysis of their wind-induced vibration response is necessary to ensure the structure’s absolute safety. This investigation conducted wind tunnel tests for the construction and completion stages to reveal the vortex-induced vibration (VIV) phenomenon of a double-deck suspension bridge. The results showed that no VIV occurred during the construction stage. However, the inclusion of railings significantly deteriorated the aerodynamic performance of the suspension bridge, leading to significant VIV at +3° and +5° wind angles of attack. Additionally, reducing the railing ventilation rate can significantly suppress the VIV amplitude. A new analysis method based on computational fluid dynamics (CFD) simulation is proposed to investigate the VIV mechanism of the double-deck truss girder. Twenty-nine measurement points were used to explore the vortex that causes VIV. The numerical simulations found that the area above and aft of the upper deck dominated the vertical VIV, while the aft of the lower deck dominated the torsional VIV. Furthermore, the intensity of the vortex in these areas was significantly lower during the construction stage. Moreover, reducing the railing ventilation rate significantly suppresses the torsional VIV by reducing the intensity of the vortex in the region behind the lower deck.https://www.mdpi.com/2076-3417/13/16/9314vortex-induced vibrationdouble-deck suspension bridgerailing effectcomputational fluid dynamics simulationwind tunnel test
spellingShingle Gang Yao
Yuxiao Chen
Yang Yang
Yuanlin Zheng
Linjun Wu
Hongbo Du
Research on Mechanism of Vortex-Induced Vibration Railing Effect of Double-Deck Large-Span Suspension Bridge
Applied Sciences
vortex-induced vibration
double-deck suspension bridge
railing effect
computational fluid dynamics simulation
wind tunnel test
title Research on Mechanism of Vortex-Induced Vibration Railing Effect of Double-Deck Large-Span Suspension Bridge
title_full Research on Mechanism of Vortex-Induced Vibration Railing Effect of Double-Deck Large-Span Suspension Bridge
title_fullStr Research on Mechanism of Vortex-Induced Vibration Railing Effect of Double-Deck Large-Span Suspension Bridge
title_full_unstemmed Research on Mechanism of Vortex-Induced Vibration Railing Effect of Double-Deck Large-Span Suspension Bridge
title_short Research on Mechanism of Vortex-Induced Vibration Railing Effect of Double-Deck Large-Span Suspension Bridge
title_sort research on mechanism of vortex induced vibration railing effect of double deck large span suspension bridge
topic vortex-induced vibration
double-deck suspension bridge
railing effect
computational fluid dynamics simulation
wind tunnel test
url https://www.mdpi.com/2076-3417/13/16/9314
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