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| Gust characteristic analysis of wind field at the periphery of typhoon ‘Bolaven’ |
| WANG Xiaosong1,GUO Zengwei1,YUAN Hang1,ZHAO Lin2 |
1. The Ministry of Education Engineering Research Center of Bridge Structure and Material in Mountainous Area, Chongqing Jiaotong University, Chongqing 400074, China;
2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China |
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Abstract Base on longtimemeasured data of typhoon ‘Bolaven’ recorded at the Xihoumen Bridge, wind characteristics, such as wind speed, wind direction, turbulence intensity, probability distribution and its extreme and average value of gust factor under different averaging time periods were investigated. It was shown that the turbulence intensity and gust factor of Balaven were decreasing with average wind speed in three directions, and that the mean statistical result of turbulence intensity related to longitudinal fluctuation components was 0.161 at high wind speed, which was higher than the recommended value. The gust factor analysis results show that the probability distribution of gust factor is converted from extreme value type III to type II with gust averaging time, and the statistical value of gust factor at 95% confidence level is identical to the recommended value in load code for the design of building structures. It is also discovered that Logarithmic Gauss distribution function can be used to describe the relationship between gust factor and its corresponding time interval.
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Received: 12 October 2016
Published: 18 April 2018
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