Wind characteristics near bridge during strong typhoon procedures

In recent years, the southeast coastal areas are frequently influenced by strong typhoon. Based on the data of typhoon Muifa (Muifa 1109) measured by the bridge health monitoring system, the wind fluctuating characteristics of two places were analysed. The characteristics, such as turbulence intensity (TI), turbulence scale (TS), gust factor (GF), distribution of fluctuating wind, were mainly discussed. The results show that before and after typhoon landing TI is scattered than it during typhoon. Lateral TI is greater than longitudinal TI ( ）) at 205.5m, so value according the Standard is bad for the wind resistance of bridge. TSs are larger than the Standard, especially lateral value (larger by 16.4%). Fitting curve of GF changing with TI is under Ishizaki curve and above Choi curve & Cao fitting curve.