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摘要
Based on the wind speed records from the 356 m high Shenzhen Meteorological Gradient Tower (SZMGT), the characteristics of mean wind, turbulence and wind spectrum at the periphery of typhoon Kompasu were analyzed, and the wind effect on the SZMGT were further investigated. It is observed that the mean value of wind profile index during high wind speed period is 0. 243 and the low-altitude turbulence intensity is between Class C and Class D sites of GB 50009—2012 ‘Load code for the design of building structures’, while the high-altitude turbulence intensity is close to Class C site. The measured wind spectrum at the height of 320 m is consistent with the von Karman spectrum, but there is a certain difference at the low altitude. During Kompasu, the SZMGT mainly vibrated in the crosswind direction, the multimodal participation for the response of SZMGT was very obvious, while the effect of rope vibration was not negligible. The acceleration amplitude had a certain influence on the modal frequency and damping of SZMGT. The modal frequencies of the first three modes in both x and y directions tend to decrease with increasing responses. The identified damping ratios are relatively discrete. The damping ratios of the first three modes in y direction and the first mode in x direction tend to increase with increasing responses, while the damping ratios of the second and third modes in x direction tend to decrease with increasing responses. ? 2023 Science Press.
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