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Structural Engineering and Mechanics Volume 10, Number 6, December 2000 , pages 545-559 DOI: https://doi.org/10.12989/sem.2000.10.6.545 |
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Field measurement results of Tsing Ma suspension Bridge during Typhoon Victor |
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Xu YL, Zhu LD, Wong KY, Chan KWY
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| Abstract | ||
| A Wind and Structural Health Monitoring System (WASHMS) has been installed in the Tsing Ma suspension Bridge in Hong Kong with one of the objectives being the verification of analytical processes used in wind-resistant design. On 2 August 1997, Typhoon Victor just crossed over the Bridge and the WASHMS timely recorded both wind and structural response. The measurement data are analysed in this paper to obtain the mean wind speed, mean wind direction, mean wind inclination, turbulence intensity, integral scale, gust factor, wind spectrum, and the acceleration response and natural frequency of the Bridge. It is found that some features of wind structure and bridge response are difficult to be considered in the currently used analytical process for predicting buffeting response of long suspension bridges, for the Bridge is surrounded by a complex topography and the wind direction of Typhoon Victor changes during its crossing. It seems to be necessary to improve the prediction model so that a reasonable comparison can be performed between the measurement and prediction for long suspension bridges in typhoon prone regions. | ||
| Key Words | ||
| field measurement, Typhoon Victor, suspension bridge, wind characteristics, acceleration response, implication to buffeting analysis | ||
| Address | ||
| Xu YL, Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong, Peoples R China Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong, Peoples R China Tsing Ma Control Area Div, Highways Dept, Hong Kong, Hong Kong, Peoples R China | ||