Reconstruction of boundary layer wind field at the SEG plaza based on dual-lidar measurement and numerical simulation

On the basis of the boundary layer wind field data measured by two Doppler lidars, the correlations between wind speed and wind direction at the Shenzhen Meteorological Tower (SMT) and the Shenzhen Electronics Group (SEG) Plaza are analyzed, and the urban boundary layer wind field characteristics at the SEG Plaza are explored. The wind field characteristics during the May 18 vibration event of the SEG Plaza are then reconstructed by using the computational fluid dynamics numerical simulation method. Results show that: 1) The 10-min mean wind speed and wind direction between the two sites at a height of about 350 m high altitude are highly correlated despite the SMT is geographically 22.4 km from the SEG Plaza; 2) The mean wind profile exponent of incoming flow direction (wind direction SW) in the vibration event of SEG Plaza is obtained as 0.40 by combining the measured wind field result and CFD numerical simulation. At the building top, the wind profile exponent of the high-altitude guyed masts is about 0.22 due to the flow field is affected by the building itself, and the wind speed borne by the top height (about 350 m) of the guyed masts is about 9.64–10.64 m/s.