Measurement of Non-Stationary Characteristics of a Landfall Typhoon at the Jiangyin Bridge Site

The wind-sensitive long-span suspension bridge is a vital element in land transportation. Understanding the wind characteristics at the bridge site is thus of great significance to the wind- resistant analysis of such a flexible structure. In this study, a strong wind event from a landfall typhoon c...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2017-09, Vol.17 (10), p.2186
Main Authors: He, Xuhui, Qin, Hongxi, Tao, Tianyou, Liu, Wenshuo, Wang, Hao
Format: Article
Language:English
Subjects:
Bridges
Civil engineering
field measurement
Hurricanes
long-span suspension bridge
non-stationarity
Sensors
Suspension bridges
Trends
tropical storm
Turbulence intensity
Turbulent wind
Typhoons
Wavelet analysis
Wind
wind characteristics
Wind effects
Wind resistance
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Summary:The wind-sensitive long-span suspension bridge is a vital element in land transportation. Understanding the wind characteristics at the bridge site is thus of great significance to the wind- resistant analysis of such a flexible structure. In this study, a strong wind event from a landfall typhoon called Soudelor recorded at the Jiangyin Bridge site with the anemometer is taken as the research object. As inherent time-varying trends are frequently captured in typhoon events, the wind characteristics of Soudelor are analyzed in a non-stationary perspective. The time-varying mean is first extracted with the wavelet-based self-adaptive method. Then, the non-stationary turbulent wind characteristics, e.g.; turbulence intensity, gust factor, turbulence integral scale, and power spectral density, are investigated and compared with the results from the stationary analysis. The comparison highlights the importance of non-stationary considerations of typhoon events, and a transition from stationarity to non-stationarity for the analysis of wind effects. The analytical results could help enrich the database of non-stationary wind characteristics, and are expected to provide references for the wind-resistant analysis of engineering structures in similar areas.
ISSN:1424-8220
1424-8220
DOI:10.3390/s17102186