大跨度球型屋盖结构风致连续破坏过程模拟

利用计算流体动力学（CFD）软件CFX11.0,基于雷诺平均（RANS）方法的SSTk-ω湍流模型,对大跨度球型屋盖风致破坏过程进行了二维数值模拟,研究风致连续破坏过程中,屋盖开口附近风压系数的变化规律.结果表明,大跨度球型屋盖风致破坏区域受矢跨比的影响,屋盖破坏过程中破坏开口边缘处风压发生较大变化,这是屋盖风致连续破坏的主要原因.此外,结构前后入口也对破坏开口屋面内外表面风压系数分布规律有较大影响.

Analysis on wind-induced continuous damage of the long-span dome structures

Using the SST k-w turbulence model, the numerical simulation of wind-induced continuous damage of 2D long-span dome structures are conducted by CFX11.0 to investigate the external and in- ternal wind pressure coefficients near the opening hole. It is demonstrated that the wind-induced dam- age regions are different because of the different rise-span ratios for a long-span dome structure. The wind pressure coefficients near the opening hole change dramatically in the process of damage which is the main cause of the wind-induced continuous damage of the roof. In addition, the entrance also influ- ences wind pressure coefficients on the upper surface of the roof.