Nonstationarity analysis in wind-rain-induced vibration of stay cables

Wind and wind-rain-induced cable vibration are usually nonstationary. Based on the field measured wind data from the Dongting Lake Bridge (DLB) in China, a wavelet-based method was developed to investigate the wind characteristics of wind-rain-induced cable vibration. By using the wavelet analysis,...

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Bibliographic Details
Published inJournal of civil engineering and management Vol. 18; no. 6; pp. 821 - 827
Main Authors He, Xu-hui, Yu, Xiang-dong, Chen, Zheng-qing
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.12.2012
Vilnius Gediminas Technical University
Subjects
Acceleration
Acoustic properties
Bridges, Suspension
Cables
China
Correlation
Equipment and supplies
Mathematical models
Mechanical properties
nonstationarity
Properties
Rain and rainfall
stay cable
Turbulence intensity
Vibration
wavelet analysis
Wavelet transforms
Wind speed
wind-rain induced vibration
Winds
China
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Summary:Wind and wind-rain-induced cable vibration are usually nonstationary. Based on the field measured wind data from the Dongting Lake Bridge (DLB) in China, a wavelet-based method was developed to investigate the wind characteristics of wind-rain-induced cable vibration. By using the wavelet analysis, the time-varying mean wind speed is extracted and a nonstationary wind speed model is proposed. The turbulence intensities and probability distributions of measured wind data are calculated using the proposed nonstationary model and compared with those based on empirical mode decomposition (EMD) and design values. The correlation between wind and wind-rain-induced acceleration response are discussed. At the same time, the relativity of acceleration responses of cable and the wind speed are discussed via calculating root mean square (RMS) averaging and acceleration response peak factors.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1392-3730
1822-3605
DOI:10.3846/13923730.2012.720933