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采用局部建模计算和整体建模计算相结合的方式,对径向波形单层网格阳光顶进行了结构分析。根据排水要求确定波谷积水荷载,根据玻璃幕墙要求确定钢网格大小。局部采用三角形网格,提高了结构承载力和刚度,减小了阳光顶的挠度。通过增加钢柱数量,减小钢柱直径,提高了结构抗震性能和稳定承载力。整体稳定分析考虑了材料非线性、几何非线性和初始几何缺陷,初始几何缺陷计及1~4阶屈曲模态的正负向。采用直接分析设计法解决钢柱长细比超限问题。通过局部模型和整体模型的对比,评估整体结构对阳光顶的影响。结构分析表明径向波形单层网格阳光顶在结构上是可行的。
Using the combination of local modeling calculation and global modeling calculation, the structural analysis of the radial corrugated single-layer grid sunshine dome was carried out. According to drainage requirements to determine trough valley water load, according to glass curtain wall to determine the size of steel grid. Local use of triangular grid, improve the structural bearing capacity and stiffness, reducing the deflection of the sun roof. By increasing the number of steel columns and reducing the diameter of the steel columns, the seismic performance and the stable bearing capacity of the structure are improved. The overall stability analysis takes into account the material nonlinearity, geometrical nonlinearity and initial geometric imperfections. The initial geometric imperfections account for the positive and negative first- and fourth-order buckling modes. Using direct analysis and design method to solve the problem of slenderness ratio of steel column. Through the comparison between the local model and the overall model, the impact of the overall structure on the sun roof is evaluated. The structural analysis shows that the structure of radial wave single-layer grid sunshine dome is feasible.