Experimental Study of Across-Wind Aerodynamic Behavior of a Bridge Tower

Ma, Cunming; Liu, Yangzhao; Yeung, Ngai; Li, Qiusheng

doi:10.1061/(asce)be.1943-5592.0001348

Cited by 13 publications

(5 citation statements)

References 17 publications

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“…In recent decades, numerous studies have been conducted focusing on the VIV performance of long-span bridges (Bearman and Owen, 1998; Ehsan and Scanlan, 1990; Griffin and Hall, 1991; Liu et al, 2018; Matsumoto, 1999; Yang et al, 2016). Studies of VIV suppression and control for various bridges follow and a number of meaningful conclusions are summarized (Camarri and Iollo, 2010; Chen et al, 2014; Du and Sun, 2015; Fujino and Yoshida, 2002; Ma et al, 2018; Wu and Kareem, 2013). Common VIV countermeasures include both aerodynamic and mechanical countermeasures (Chen et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies of the vortex-induced vibration behavior of an asymmetrical composite beam bridge

et al. 2019

Advances in Structural Engineering

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies of the vortex-induced vibration behavior of an asymmetrical composite beam bridge

et al. 2019

Advances in Structural Engineering

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“…The boundary layer inflow conditions were produced using spires and rough elements regularly arranged in the upstream, as illustrated in Figure 4. The wind tunnel test chamber has a rectangular section with a height of 4.5 m and width of 22.5 m, which is ideal for large model tests (Ma et al, 2019a). Four large fans are installed at the front of the test chamber, each with a maximum power of 160 kW.…”

Section: Xnjd-3 Wind Tunnelmentioning

confidence: 99%

Influence of elevated water levels on wind field characteristics at a bridge site

Jing

Liao

et al. 2019

Advances in Structural Engineering

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The influence of elevated water levels on wind field characteristics at bridge sites owing to hydroelectric power stations plays an important role in bridge engineering, particularly in mountainous valley regions. To investigate this issue, a comparative experimental study, which uses a topographic model with two water level states for determining the influence on wind field characteristics at the proposed bridge site located in a mountainous valley area, was conducted in the XNJD-3 wind tunnel at Southwest Jiaotong University, Chengdu, PR China. The altitude difference between the two water level states was approximately 200 m, whereas uniform and D-type boundary layer air inflow conditions were adopted during the wind tunnel test, respectively. The wind speed at the bridge girder and profile of the 1/4, mid, and 3/4 spans were recorded during the experiment. The test results indicated that after the water level was raised, the mean wind speed (or speed-up factor) along the bridge girder decreased by approximately 10%, and the values of the wind profile also decreased. However, the wind profile curve shapes remained approximately unchanged, and the wind attack angle was significantly transformed by approximately 5° in certain locations of the bridge girder. Moreover, the variation in the water level had a negligible influence on the turbulence intensities, turbulence integral length scales, probability distribution of fluctuating wind components, and turbulent wind spectra along the bridge girder. Therefore, as the water level in the canyon rises, the wind field characteristics at the bridge site tend to be conducive to bridge safety. Therefore, long-span bridges located in mountainous valley areas should be designed appropriately according to the expected minimum water level of the river.

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“…Fang et al (2019) compared different copula models and selected the optimal model to simulate the correlation of wind and wave parameters, and studied the extreme response of a sea-crossing bridge tower under correlated wind and waves. Ma et al (2019) conducted a wind tunnel test on a free-standing single-column pylon with a chamfered square cross section by using the segmental model and the full-bridge aeroelastic model. Fang et al (2020) studied the vibration of a four-column high bridge tower by wind tunnel tests and numerical simulations and pointed out that the displacement of the tower top increased with the increase of wind speed, and different cross sections of the tower showed different vortex shedding phenomena.…”

Section: Introductionmentioning

confidence: 99%

Flow field characteristics analysis of vortex-induced vibration of bridge tower based on dynamic mode decomposition method

Ma,

Li,

Zhang

et al. 2023

Advances in Structural Engineering

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As a high-rise structure, the tower of a suspension bridge has low stiffness due to the lack of cable system constraints when it is self-supporting. Wind-induced vibration is one of the key factors in design and construction. In this paper, the wind tunnel test of the bridge tower aeroelastic model is carried out in two different flow fields, and the wind vibration response under a self-supporting state is systematically studied. Meanwhile, numerical simulation of the unsteady flow field around the tower section is carried out, and the dynamic modal decomposition (DMD) method is used to study the modal frequency of the flow field, the surface pressure of the section, flow field reconstruction error, and the stability of the flow field around tower section is discussed. The results show that in the self-supporting state, the displacement of the tower top presents a quadratic curve relationship with the wind speed, and no galloping phenomenon occurs under the test wind speed. However, in the uniform flow, when the wind attack angle is 90°, the bridge tower has an obvious vortex-induced vibration (VIV) phenomenon. After decomposing the flow field by the DMD method, it is found that there is strong aerodynamic interference between the double rectangular column sections, the first seven orders of modal energy play a major role in the flow field, and when the main modal energy accounts for more than 90%, the reconstruction can realize the accurate restoration of the information such as the surface pressure. For the complex flow field structure, it shows that the method can more accurately identify the coherent structure and background part in the unsteady flow field. This paper provides an idea for future research on the characteristics of the flow field around complex sections and helps to further improve the understanding of the VIV mechanism.

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Experimental Study of Across-Wind Aerodynamic Behavior of a Bridge Tower

Cited by 13 publications

References 17 publications

Experimental and numerical studies of the vortex-induced vibration behavior of an asymmetrical composite beam bridge

Experimental and numerical studies of the vortex-induced vibration behavior of an asymmetrical composite beam bridge

Influence of elevated water levels on wind field characteristics at a bridge site

Flow field characteristics analysis of vortex-induced vibration of bridge tower based on dynamic mode decomposition method

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