Published by State Key Laboratory of Subtropical Building Science, South China University of Technology.

Abstract: In order to study the vibration problem of Shenzhen SEG Building 5.18, the analysis was carried out based on the measured data of the atmospheric boundary layer wind field captured by two wind measurement lidars deployed in Shenzhen. The results showed that during the vibration event of the SEG Building, a sudden wind meteorological event lasting about 12 hours occurred in the sky above Shenzhen; the maximum horizontal average wind speed within the 300-350 m altitude range of the top of the building was 9-12 m/s; The horizontal wind direction is stable, basically maintaining the south-southwest wind direction; in the height range of 200-350 m, there is a certain wind shear in the horizontal direction; although the wind speed in the vertical direction is generally small, there is obvious low-level convective movement in the atmosphere; on the whole, The closer to the ground, the stronger the low-altitude convection. Based on this and combined with the existing vibration observation results, it is analyzed that the possible reason for the vibration of the building is that the specific wind conditions cause the vortex-induced resonance of the mast on the top of the building, and the long-lasting stable wind weather conditions make the mast continuously absorb from the shedding vortex excitation. The energy is transmitted to the main body of the building through the concrete-filled steel tube structure of the building, which in turn triggers the high-order resonance response of the mast-tower system.