Aerodynamic characteristics of a long-span cable-stayed bridge under construction

Ma, Cunming; Duan, Qingsong; Li, Qiusheng; Liao, Haili; Qi, Tao

doi:10.1016/j.engstruct.2018.12.097

Cited by 41 publications

(13 citation statements)

References 24 publications

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“…The two ultrasonic anemometers are installed at the top of 2.5 m tall iron column with an elevation of 76.3 m above the sea level. It should be noted that the interference effect from the truss girder is relatively smaller compared to that from the box girder [18]. Accordingly, the field measurements from the ultrasonic anemometers in this study can well present the oncoming wind characteristics.…”

Section: Wireless Monitoring Systemmentioning

confidence: 61%

“…Compared to the land-based measurement tower, the WMS installed on the bridge is apparently more representative and accurate. Although the WMS has become very popular and been treated as an essential part of the united wind and structural health monitoring system (WSHMS) in major and important bridges around the world to enhance structural safety and verify the current wind-induced vibration theory [7][8][9][10][11][12][13][14][15][16][17][18], most of the available studies concentrate on the wind characteristics and buffeting response of cable-supported bridges under the service stage. On the other On the other hand, it is well known that the cable-stayed bridges are considerably more vulnerable to oncoming wind turbulence during construction than after completion [8,[18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…Although comprehensive numerical analyses have appeared for wind-induced vibrations of long-span bridges under construction, they require variously identified bridge aerodynamic force parameters of deck or tower, such as eighteen flutter derivatives and six-component aerodynamic admittances of bridge decks from the wind-tunnel testing of a sectional model or the computational fluid dynamics [24][25][26][27]. Furthermore, the wind-tunnel tests of an aeroelastic model [19][20][21][22][23] and/or full-scale measurements [8,18] are expected for important bridges to provide added confidence on their performance under strong winds and to advance the theoretical analysis of the wind-induced vibrations of bridges. Compared to the wind-tunnel testing of the aeroelastic model, few data of fullscale measurement for cable-stayed bridges under construction subjected to strong winds, especially for the extreme double-cantilever and single-cantilever states, are available.…”

Section: Introductionmentioning

confidence: 99%

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Strong Wind Characteristics and Buffeting Response of a Cable-Stayed Bridge under Construction

Yan

Ren

et al. 2020

Sensors

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This study carries out a detailed full-scale investigation on the strong wind characteristics at a cable-stayed bridge site and associated buffeting response of the bridge structure during construction, using a field monitoring system. It is found that the wind turbulence parameters during the typhoon and monsoon conditions share a considerable amount of similarity, and they can be described as the input turbulence parameters for the current wind-induced vibration theory. While the longitudinal turbulence integral scales are consistent with those in regional structural codes, the turbulence intensities and gust factors are less than the recommended values. The wind spectra obtained via the field measurements can be well approximated by the von Karman spectra. For the buffeting response of the bridge under strong winds, its vertical acceleration responses at the extreme single-cantilever state are significantly larger than those in the horizontal direction and the increasing tendencies with mean wind velocities are also different from each other. The identified frequencies of the bridge are utilized to validate its finite element model (FEM), and these field-measurement acceleration results are compared with those from the FEM-based numerical buffeting analysis with measured turbulence parameters.

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Section: Wireless Monitoring Systemmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Strong Wind Characteristics and Buffeting Response of a Cable-Stayed Bridge under Construction

Yan

Ren

et al. 2020

Sensors

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“…However, the longer and slimmer the bridges are, the more difficulties we have to face in analysis and design, especially aerodynamic effects such as buffeting, vortex, flutter and turbulence (refers Refs. [1][2][3][4], among others). In among many components of a cable-stayed bridge, stay cables with a very long length and a small cross-sectional area have low damping factors and a wide range of natural frequencies.…”

Section: Introductionmentioning

confidence: 98%

A three-dimensional model for rain-wind induced vibration of stay cables in cable-stayed bridges

Truong

Viet

Anh

2019

STCE

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In this paper, the effects of wind velocity according to height above the ground on the rain-wind induced vibration (RWIV) of stay cables are investigated. RWIV of the cable is modeled using the linear theory of cable vibration and the central difference algorithm. The wind speed profile according to height above the ground, which affects both aerodynamic forces acting on the cable and the oscillation of the rivulet on the cable surface, is taken into account in the theoretical formulation. The fourth-order method Runge-Kutta is used for solving the system of differential equation of the cable oscillation. The proposed 3D model of the stay cable is then used to assess the effects of wind velocity distribution on cable RWIV. The results obtained in this study showed that in most current cable-stayed bridges, in which the height of pylons is lower than 200 m, the change of wind velocity according to the height above the ground should be included in RWIV analyses. Keywords: stay cable; rain - wind induced vibration; rivulet; analytical model; vibration.

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“…Zhu et al (2018) identified the six-component aerodynamic admittance of the closed-box bridge deck in a wind tunnel test. Ma et al (2019a) studied the aerodynamic characteristics of the bridge girder and buffeting response through field measurements. To date, few studies have measured the aerodynamic admittance function of a Π-shaped girder.…”

Section: Introductionmentioning

confidence: 99%

Buffeting response of a composite cable-stayed bridge in a trumpet-shaped mountain pass

Shen

Gao

et al. 2019

Advances in Structural Engineering

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Previous research showed that wind characteristics were influenced by terrain. To accurately calculate the wind-induced bridge response, this article presented a comprehensive investigation of the wind characteristics of a trumpet-shaped mountain pass by long-term monitoring. Basic strong wind characteristics such as the wind rose, turbulence intensities, turbulence length scales, turbulence spectra and normalized cross-spectrum were discussed using 10 min intervals. Due to the different types of terrain on the two sides of the bridge site, this article attempted to reflect the influence of the terrain on the wind characteristics in different wind directions. The scatter plots of wind characteristics were presented directly on the terrain map. The effects of the turbulence characteristics, mean wind speed and aerodynamic admittance function on buffeting response of the composite cable-stayed bridge were discussed by the multimode coupled frequency domain. The results show that the wind profile is extremely twisted. The larger turbulent integral scale and the lower turbulence intensity appear in the direction along the river. The effect of the mean wind speed on the buffeting response is greater than that of the fluctuating wind characteristics. The aerodynamic admittance function proposed by Holmes has the largest reduction in buffeting response.

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Aerodynamic characteristics of a long-span cable-stayed bridge under construction

Cited by 41 publications

References 24 publications

Strong Wind Characteristics and Buffeting Response of a Cable-Stayed Bridge under Construction

Strong Wind Characteristics and Buffeting Response of a Cable-Stayed Bridge under Construction

A three-dimensional model for rain-wind induced vibration of stay cables in cable-stayed bridges

Buffeting response of a composite cable-stayed bridge in a trumpet-shaped mountain pass

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