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Sensors 2017, 17(10), 2186; https://doi.org/10.3390/s17102186

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

1
School of Civil Engineering, Central South University, Changsha 410006, China
2
School of Civil Engineering, Southeast University, Nanjing 211189, China
*
Authors to whom correspondence should be addressed.
Received: 21 August 2017 / Revised: 12 September 2017 / Accepted: 20 September 2017 / Published: 22 September 2017
(This article belongs to the Special Issue Sensors for Transportation)
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Abstract

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. View Full-Text
Keywords: wind characteristics; tropical storm; non-stationarity; field measurement; long-span suspension bridge wind characteristics; tropical storm; non-stationarity; field measurement; long-span suspension bridge
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He, X.; Qin, H.; Tao, T.; Liu, W.; Wang, H. Measurement of Non-Stationary Characteristics of a Landfall Typhoon at the Jiangyin Bridge Site. Sensors 2017, 17, 2186.

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