Measurements and analysis of non-stationary wind characteristics at Sutong Bridge in Typhoon Damrey

Wang, Hao; Wu, Teng; Tao, Tianyou; Li, Aiqun; Kareem, Ahsan

doi:10.1016/j.jweia.2016.02.001

Cited by 86 publications

(34 citation statements)

References 19 publications

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“…Other researchers (Wang et al, 2013; Xu et al, 2000) also made a great deal of contributions on the wind characteristics of bridge sites. Many other pieces of literature discussed the wind characteristics under extreme weather conditions, such as typhoons and cyclones (Li et al, 2015; Song et al, 2012; Wang et al, 2016). Moreover, compared with the coastal area, there are a few studies by means of field measurement methods recently to depict the wind flow characteristics in complex terrains.…”

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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“…It can be seen that the time-varying mean wind speed can better reflect the trend of the nonstationary wind speed. To extract the time-varying characteristics of the nonstationary wind speed, as shown in Figure 5, the abovementioned DB10 wavelet matrix multiscale method was used for a 10-level decomposition [6,21]. With the increase in level number, the filtered frequency component becomes smaller and the approximate value better represents the time-varying mean value.…”

Section: Extraction Of the Nonstationary Wind Modelmentioning

confidence: 99%

“…Consequently, the wind load has become the most important control factor affecting structural safety [3]. Therefore, field monitoring of the wind environment [4][5][6] and structure dynamic response [7] has become an important topic. Recording wind environment measurements and performing a buffeting statistical analysis of the measured data constitute the most effective way to understand the wind characteristics of a region.…”

Section: Introductionmentioning

confidence: 99%

Field Monitoring and Analysis of the Vibration of Stay Cables under Typhoon Conditions

Guo

Zhu²

2020

Sensors

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Structural health monitoring systems provide many advantages for full-scale measurements in bridge monitoring. In this study, a strong landing typhoon event recorded at the Jintang Bridge (Zhejiang Province, China) in 2019 was selected to study the nonstationary wind and cable vibration characteristics. To study the characteristics of the recorded typhoon, the time-varying mean wind was extracted based on the adaptive method of the wavelet-matrix transform. The nonstationary characteristics of Typhoon Lekima, including the turbulence intensity, gust factor, and fluctuating wind power spectral density, were analyzed and compared with the stationary model characteristics of a typhoon, and the typical characteristics and parameters were obtained. In addition, the measured vibration response of the cables was analyzed. The vibration characteristics of the cables and the energy distribution of the wind speed wavelet packet were investigated. The vibrations at different positions were compared. A power spectrum analysis and a wavelet packet energy analysis of the cable were performed. The results of this study can be used as a basis for wind-resistant design and performance evaluation of bridges under similar operational conditions.

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“…e complexity, scale, and design technology of this project rank first in the history of China. One obvious feature of this bridge is the low stiffness and long natural vibration period, making this bridge very sensitive to wind load [18,19]. erefore, the wind-resistant performance of this bridge is thoroughly studied using the monitoring wind load and its displacement response data.…”

Section: Description Of Bridge Health Monitoringmentioning

confidence: 99%

Evaluation of the Wind‐Resistant Performance of Long‐Span Cable‐Stayed Bridge Using the Monitoring Correlation between the Static Cross Wind and Its Displacement Response

Gao-xin

Feng

2018

Shock and Vibration

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The wind-resistant performance of existing long-span cable-stayed bridge structures will inevitably deteriorate due to concrete carbonation, reinforcement corrosion, accumulated fatigue damage, etc., which can threaten the entire bridge safety. However, few studies currently focus on assessing the wind-resistant performance of existing long-span cable-stayed bridge structures, and at present, no studies have revealed how to identify the deterioration of the wind-resistant performance using a bridge health-monitoring technique. Therefore, based on the health-monitoring system installed on the Sutong Cable-stayed Bridge, the monitoring wind field and GPS displacement are captured to analyze the wind-resistant performance. First, the correlation between static cross wind and transversal displacement is analyzed, which is nearly linear but also contains discrete points caused by environmental noise. Second, considering that the discrete points can decrease the identification accuracy, one new method called the cross-correlation analysis of wavelet packet coefficients is put forward to effectively remove the discrete points. Third, considering that the traditional function cannot match the monitoring correlation very well, some new fitting functions are thoroughly studied to determine the best function for fitting the monitoring correlation. Fourth, the abnormal variation in the monitoring correlation caused by a deterioration in the wind-resistant performance is studied, and the root-mean-square (RMS) variable, which represents the difference between a good service state and a deteriorated service state, is used as a detection indicator to identify the deterioration of wind-resistant performance. Finally, the monitoring data from ten months are selected to evaluate the wind-resistant performance of the Sutong Bridge, and the result shows that its wind-resistant performance was still in a good service state during these ten months.

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Measurements and analysis of non-stationary wind characteristics at Sutong Bridge in Typhoon Damrey

Cited by 86 publications

References 19 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

Field Monitoring and Analysis of the Vibration of Stay Cables under Typhoon Conditions

Evaluation of the Wind‐Resistant Performance of Long‐Span Cable‐Stayed Bridge Using the Monitoring Correlation between the Static Cross Wind and Its Displacement Response

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