Large eddy simulation of wind induced response on the Shenzhen Pingan IFC Building

A new inflow turbulence generator was applied to simulate three kinds of inflow boundary conditions of turbulent flow field. A new one-equation dynamic subgrid scale (SGS) model was adopted for the present full-scale size large eddy simulations with extremely high Reynolds numbers (10×10⁸). The mean pressures, fluctuating pressures and time-histories of the wind forces on the surface of Shenzhen Pingan IFC in the three flow field conditions were calculated based upon the paralleled technology of Fluent 6.3 software platform under the Linux system. The equivalent static wind loads and wind-induced responses were obtained by the IWL method in frequency domain analysis. The effects of different turbulent flow fields on the wind pressure coefficients, wind forces and wind-induced response were discussed. The wind fields around the Shenzhen Pingan IFC are significantly different under the uniform and turbulence approaching wind flows. The along-wind loads are mainly dependent on the mean wind velocity. The across-wind loads increase with the increase of the turbulence intensity of approaching wind flow. In terms of the turbulence flow defined by Chinese code, the along and cross wind peak accelerations under 10 years return period at the top floor of the Shenzhen Pingan IFC satisfy the comfort requirement for the occupant.