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以苏州中心展开长度近630m的异形曲面钢屋面为背景,对数值风洞在结构风荷载设计和风环境分析中的运用进行了探讨。采用数值风洞对屋面结构在不同风向角下的风荷载特性进行了数值模拟分析,计算得到上部结构表面的风压系数与物理风洞试验结果吻合较好;基于分析结果采用时域法对屋面进行了风致振动响应分析,并对屋面结构周围行人高度处风环境进行了模拟评估。最后,分析了数值风洞和物理风洞两者之间的差异,提出了数值风洞模拟的改进方法和思路。
Based on the curved steel roof with a length of nearly 630m in Suzhou Center, the application of numerical wind tunnel in structural wind load design and wind environment analysis was discussed. The numerical wind tunnel is used to analyze the wind load characteristics of the roof structure at different wind angles. The wind pressure coefficient of the upper structure is in good agreement with the physical wind tunnel test results. Based on the analysis results, Wind-induced vibration response analysis was conducted, and the wind environment around the roof structure at pedestrian height was simulated and evaluated. Finally, the difference between numerical wind tunnel and physical wind tunnel is analyzed, and the improved method and train of thought for numerical wind tunnel simulation are proposed.