Study of the Interference Effect of Building on the Along-Wind Load of Tower Crane

摘要

The wind loads of tower crane may be changed greatly under the interference of building. Based on CFD numerical method, the building and tower crane model with different lateral and longitudinal spacing ratios were established, and wind load coefficients of tower crane with/without building around were obtained. By defining the along-wind interference factor, the distribution characteristics of interference factor of the mast section and the counter-jib section under different wind directions were systematically studied. The results show that the interference effect of building on tower crane under different lateral and longitudinal spacing ratios and different wind directions is mainly shielding effect. The distribution law of interference factor of mast section along the height accords with cubic function under 0°, 30° and 60° wind directions, and the maximum value is about 0.6 at 60° wind direction. The interference factor of counter-jib section fluctuate around 1 under different wind directions, but the distribution law of interference factor of counter-jib is consistent with quadratic function under 120° and 150° wind directions.