Buffeting response of a suspension bridge in complex terrain

Cheynet, Etienne; Jakobsen, Jasna Bogunović; Snæbjörnsson, Jónas Þór

doi:10.1016/j.engstruct.2016.09.060

Cited by 101 publications

(25 citation statements)

References 51 publications

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“…Bastos et al (2018) investigated the properties of the atmospheric wind during an abrupt volcanic breach where affected by cyclones frequently and pointed that a deep and shallow ravine would naturally accelerate the local wind and affect the wind-induced response of the bridge. Cheynet et al (2016) studied the buffeting response of a suspension bridge in complex terrain based on full-scale data, and the effect of the topography was investigated. Fenerci et al (2017) discussed the relationship between the wind-loading and response processes by using long-term monitoring data of wind properties.…”

Section: Introductionmentioning

confidence: 99%

Comparison of wind characteristics at different heights of deep-cut canyon based on field measurement

Zhang

et al. 2019

Advances in Structural Engineering

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The typical U-shaped deep-cut canyon is widely distributed in the western mountainous areas of China, especially in Sichuan province and Yunnan province. The deep-cut canyon has the characteristics of the high drop in elevation, high-temperature difference, and complex wind environment. A 50 m high meteorological mast with a total of eight anemometers was erected in such topography, and a long-span suspension bridge will be constructed in the area where the meteorological mast is located. Based on the long-term monitor data, the wind characteristic parameters including average and fluctuating wind characteristics and coherence between different heights are investigated. The results are as follows. The dominant wind direction which depends on the topography is north–south. The attack angle of wind is mainly less than zero, and its probability distribution obeys the hypothetical Gaussian distribution. Both the increases in height of anemometer and in wind speed reduce the dispersion of the attack angle of wind. The gust factor has a similar change law of attack angle of wind. Turbulence intensities are affected by the height of the anemometer and the wind speed, and they are different from the recommended value of China Codes. In terms of turbulence integral length scale, the value increases with an increase in the height of the anemometer in the same component. The largest value occurs in the longitudinal direction and the smallest occurs in the vertical direction at the same level. The coherence between any two locations is relatively strong, and the longitudinal component is stronger than others. The measured wind power spectrum for longitudinal, lateral, and vertical wind in deep-cut canyon fits the von Kármán model better.

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Section: Introductionmentioning

confidence: 99%

Comparison of wind characteristics at different heights of deep-cut canyon based on field measurement

Zhang

et al. 2019

Advances in Structural Engineering

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“…The static coefficients are measured in Chang’an University Wind Tunnel Laboratory, as shown in Figure 13. The flutter derivatives can be identified by the method proposed by Ding et al (2010), and the unmeasured flutter derivatives are supplemented by quasi-steady theory (Cheynet et al, 2016).…”

Section: Buffeting Responsementioning

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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“…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%

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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Buffeting response of a suspension bridge in complex terrain

Cited by 101 publications

References 51 publications

Comparison of wind characteristics at different heights of deep-cut canyon based on field measurement

Comparison of wind characteristics at different heights of deep-cut canyon based on field measurement

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

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

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