Large Eddy Simulation Study on Wind Load Characteristics of Construction Steel Platform for High-Rise Core Tube

To study the wind load characteristics of the construction steel platform of the high-rise core tube, considering the influence of safety net permeability and core tube interference, a large eddy simulation was used for unsteady numerical simulation. The pressure jump method was used to model the safety net, and the entrance turbulence was generated through the synthesis turbulence method to obtain the wind field distribution, wind pressure coefficient, and shape coefficient of the construction steel platform. The results indicate that there is a sudden drop in internal wind pressure at the entrance of the construction steel platform, and there are strong shear vortices and vortex shedding downstream of the platform. At 0° wind direction, the net wind pressure coefficient reaches a maximum of 1.3 at the center of the windward side, and a maximum negative value of −1.2 appears at the corners; as the wind direction angle increases, the maximum wind pressure coefficient decreases from 6.4 to about 5.3. The body shape coefficients of the windward side under three different wind directions are 0.563, 0.378, and 0.153, respectively. This indicates that the ventilation of the safety net reduces the wind load on the construction steel platform, resulting in a result lower than the standard value, and the standard value is conservative. The results of this study can provide data support and engineering reference for wind resistant design and structural optimization of construction steel platform structures.