[1] Hu Jun, Guo Jian, Ou Jinping, et al. Measurement of wind field characteristicsat a long-span suspension bridge [J]. Journal of Southeast University (English Edition), 2011, 27 (3): 328-334. [doi:10.3969/j.issn.1003-7985.2011.03.020]

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Measurement of wind field characteristicsat a long-span suspension bridge()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

27

Issue:

2011 3

Page:

328-334

Research Field:

Traffic and Transportation Engineering

Publishing date:

2011-09-30

Info

Title:

Measurement of wind field characteristicsat a long-span suspension bridge

Author(s):

Hu Jun¹;  Guo Jian¹;  2;  Ou Jinping¹

¹ School of Civil Engineering, Dalian University of Technology, Dalian 116024, China
² Zhoushan Construction Headquarters of Liuheng Sea-Crossing Bridges, Zhoushan 316000, China

Keywords:

suspension bridge;  wind field;  structural health monitoring system;  field measurement

PACS:

U448;V321

DOI:

10.3969/j.issn.1003-7985.2011.03.020

Abstract:

In order to provide a reliable basis for wind resistant evaluation of a long-span suspension bridge, a structural health monitoring system is installed on a bridge in the East China Sea and the simultaneous wind data at the bridge deck and at the top of the bridge tower are recorded. The average wind speeds and directions, variations of wind speeds with height, turbulent characteristics, spatial correlation and characteristics of wind flow around the bridge deck are analyzed by using statistical methods and spectral analysis. It is found that the average wind speeds along the bridge girder are almost identical; however, the mean wind directions vary greatly at different locations. The dimensionless exponent decreases as the average wind speed increases. The measured turbulence intensities are greater than the recommended values, and the turbulence power spectrum can well fit the standard spectrum. However, the measured spectral values are considerably smaller in low frequency ranges. The mean wind speed of the wake flow decreases and the turbulence intensity increases significantly, and the spectral characteristics of the wake flow change obviously while the feature frequency of vortex shedding has not yet been observed.

References:

[1] Xiang Haifan. Modern theory and practice on bridge wind resistance [M]. Beijing: China Communications Press, 2005.(in Chinese)
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[3] Li O S, Xiao Y Q, Fu J Y, et al. Full-scale measurements of wind effects on the Jin Mao building [J].Journal of Wind Engineering and Industrial Aerodynamics, 2007, 95(6):445-466.
[4] Amano T, Fukushima H, Ohkuma T, et al. The observation of typhoon winds in Okinawa by Doppler sodar [J].Journal of Wind Engineering and Industrial Aerodynamics, 1999, 83(1/2/3):11-20.
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[7] Wang Hao, Li Aiqun, Guo Tong, et al. Comparable study on typhoon and strong northern wind characteristics of Runyang Suspension Bridge based on field tests [J].Journal of Southeast University: English Edition, 2009, 25(1):99-103.
[8] Ou Jinping. Some recent advances of intelligent health monitoring systems for civil infrastructures in mainland China [C]//Proceedings of the First International Conference on Structural Health Monitoring and Intelligent Infrastructure. Tokyo, Japan, 2003:131-144.
[9] Ko J M, Ni Y Q. Technology developments in structural health monitoring of large-scale bridges [J]. Engineering Structures, 2005, 27(12):1715-1725.
[10] Li Hui, Ou Jinping. Design and implementation of health monitoring systems for cable-stayed bridges(Ⅱ): implementations [J].China Civil Engineering Journal, 2006, 39(4):45-53.(in Chinese)
[11] CCCC Highway Consultants Co., Ltd. JTG/T D60-01—2004 Wind-resistent design specification for highway bridges [S]. Beijing: China Communications Press, 2004.(in Chinese)

Memo

Memo:

Biographies: Hu Jun(1984—), male, graduate; Ou Jinping(corresponding author), male, doctor, professor, oujinping@dlut.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.90815022, 50808160).
Citation: Hu Jun, Guo Jian, Ou Jinping. Measurement of wind field characteristics at a long-span suspension bridge[J].Journal of Southeast University(English Edition), 2011, 27(3):328-334 .[doi:10.3969/j.issn.1003-7985.2011.03.020]

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