Aerodynamic interference effects and mitigation measures on vortex-induced vibrations of two adjacent cable-stayed bridges

Meng, Xiao-Liang; Zhu, Ledong; Guo, Zhiwei

doi:10.1007/s11709-011-0129-3

Cited by 21 publications

(7 citation statements)

References 2 publications

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“…So far, much of the literature has focused on the effects of AoA on bluff bodies (Mannini et al, 2017; Prosser and Smith, 2012; Wu et al, 2020b), and investigated the changing mechanism of the aerodynamic performance, pressure distribution and dynamic responses (Bartoli and Righi, 2006; Bruno et al, 2014; Mariotti et al, 2016). However, investigations of bridge sections have always focused on the dynamic responses (Hu et al, 2019; Laima et al, 2013; Meng et al, 2011), and little literature has studied the effects of AoA on the aerodynamics and pressure distributions of the streamlined box girder. Therefore, the mechanism of the aerodynamic characteristics and pressure distributions of the streamlined box girder varying with AoA is discussed.…”

Section: Introductionmentioning

confidence: 99%

Effects of the angle of attack on the aerodynamic characteristics of a streamlined box girder

Zhang

et al. 2021

Advances in Structural Engineering

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This paper presents experimental and numerical approaches to systematically investigate the aerodynamic characteristics of streamlined box girder at angles of attack (AoA) of up to 12°. The effects of AoA on the pressure characteristics and total forces are first studied through wind tunnel experiments. Based on three-dimensional large-eddy simulations (3D LES), the flow topology is investigated to study the influence mechanism of AoAs. The results show that the flow topology around the section can be divided into three types: (i) completely attached flow pattern as |α| ≤ 4°; (ii) separated-reattached flow pattern as 6°≤|α|≤8°; (iii) fully separated flow pattern as |α| ≥ 10°. The combination of experimental and numerical results presents a deep understanding of the aerodynamic characteristics of a streamlined box girder and reveals the relationships between the pressure features and flow topology. The pressure characteristics and total forces are very sensitive to the flow separation and reattachment. At small AoAs, the flow attaches to the bridge section, the mean and RMS pressure, total force, as well as streamwise correlations change slightly with AoAs. Besides, the shear layer is a laminar pattern and has less impact on the span-wise correlations. Moreover, the vortices in the wake remain successive in the span-wise direction, and the Strouhal numbers are larger. On the other hand, with the increase of AoAs, large separation bubbles can be observed around the bridge section. Especially for fully separated flow pattern as |α| ≥ 10°, the shear layer no longer attaches to the bridge section and the separation bubble is longer than the section width. Accordingly, the mean and RMS pressure, total force, as well as streamwise correlations increase significantly. Besides, the shear layer is a turbulent pattern, and the turbulent fluctuations in wake become complex and less organized in the span-wise direction, then the St is lower than others.

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Section: Introductionmentioning

confidence: 99%

Effects of the angle of attack on the aerodynamic characteristics of a streamlined box girder

Zhang

et al. 2021

Advances in Structural Engineering

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“…Our recent study (Wang et al, 2020a) confirmed that the side-surface openings stabilized the vortex-induced vibration and galloping in a butterfly web girder with a side ratio, B/D, of 3.24, where B is the girder width and D is the girder depth. To accommodate an increase in traffic, a new bridge is sometimes constructed adjacent to an existing bridge (Honda et al, 1990;Meng et al, 2011;Kim et al, 2013;Argentini et al, 2015). Compared with the aerodynamic performance of a single stand-alone bridge, the aerodynamic performance of two bridges in tandem is more complicated and even more unstable (Honda et al, 1990;Kimura et al, 2008;Meng et al, 2011;Kim et al, 2013;Seo et al, 2013;Argentini et al, 2015;Park and Kim, 2017a;Park et al, 2017b).…”

Section: Introductionmentioning

confidence: 99%

“…To accommodate an increase in traffic, a new bridge is sometimes constructed adjacent to an existing bridge (Honda et al, 1990;Meng et al, 2011;Kim et al, 2013;Argentini et al, 2015). Compared with the aerodynamic performance of a single stand-alone bridge, the aerodynamic performance of two bridges in tandem is more complicated and even more unstable (Honda et al, 1990;Kimura et al, 2008;Meng et al, 2011;Kim et al, 2013;Seo et al, 2013;Argentini et al, 2015;Park and Kim, 2017a;Park et al, 2017b). This raises the question of whether butterfly web girders can exhibit good aerodynamic performance in a tandem arrangement.…”

Section: Introductionmentioning

confidence: 99%

Side-Surface Openings Effect on Aerodynamic Performance of Box Girders in Tandem

Wang

Yagi

Ushioda³

et al. 2021

J. Bridge Eng.

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A butterfly web girder is a box girder with discretely distributed side-surface openings. Owing to these openings, butterfly web girders show better aerodynamic performance than conventional box girders. This study aims to investigate the effects of the side-surface openings on the aerodynamic instability of a box girder when it is placed in tandem with another girder. Another aim is to investigate whether the aerodynamic instability of one girder is affected by the sidesurface openings of an adjacent girder. A series of wind tunnel tests was carried out on a butterfly web girder and conventional box girder, with another rigidly supported butterfly web girder or conventional box girder, respectively, at its upstream/downstream side. The fixed downstream 2 girder increased the galloping instability of the upstream girder, while the fixed upstream girder amplified the vortex-induced vibration of the downstream girder. The side-surface openings of the upstream girder stabilized its galloping and vortex-induced vibration, irrespective of the type of girder downstream. The side-surface openings of the downstream girder stabilized its vortexinduced vibration independent of the type of girder upstream.

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“…erefore, the wind resistance and obstacle avoidance of UAV have become more concerns [23]. For example, Al-Kaff et al [24] used the monocular vision technology to determine the location of the UAV.…”

Section: Introductionmentioning

confidence: 99%

The Feasibility Assessment Study of Bridge Crack Width Recognition in Images Based on Special Inspection UAV

Xiong

Zhong

Zhao

et al. 2020

Advances in Civil Engineering

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Bridge defects are important indicator for the bridge safety assessment. Considering the cost and inefficiency of the traditional method, the UAV system applied for bridge crack inspection is a better choice. Therefore, we have configured a bridge inspection UAV system with SLR camera, laser rangefinder. First, we have carried an evaluation experiment to determine the distance range of stable imaging for planning the safer bridge inspection route based on the special UAV system. Then, the crack recognition method combining neural network and support vector machine is used to locate and extract the bridge cracks, and then, the actual cracks are calculated according to the optical principle. Finally, a case study of the Xiangjiang-River bridge inspection is carried out to verify the feasibility of bridge defects recognition based on this UAV system, achieving above 90% in the crack width recognition, which provides a better platform for bridge inspection.

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Aerodynamic interference effects and mitigation measures on vortex-induced vibrations of two adjacent cable-stayed bridges

Cited by 21 publications

References 2 publications

Effects of the angle of attack on the aerodynamic characteristics of a streamlined box girder

Effects of the angle of attack on the aerodynamic characteristics of a streamlined box girder

Side-Surface Openings Effect on Aerodynamic Performance of Box Girders in Tandem

The Feasibility Assessment Study of Bridge Crack Width Recognition in Images Based on Special Inspection UAV

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