摘要
基于MIDAS Gen有限元软件进行大跨度异形弦支穹顶结构选型分析,主要进行网格形式对结构性能影响的研究以及类椭圆形、正多边形弦支穹顶的结构选型分析。研究表明,矢跨比较小时,凯威特-联方型弦支穹顶结构性能较好;若建筑造型无特殊要求,正多边形弦支穹顶和边界不规则的类椭圆形弦支穹顶上部网壳宜采用切割球面、椭球面、椭圆抛物面等形式。
Based on the finite element software MIDAS Gen, structural system selection of large-span specially-shaped suspendome was analyzed. The influence of grid form on structural performance was mainly studied and the analysis on structural system selection of ellipse-like suspendome and equilateral polygon suspendome was conducted. The results show that kiewitt-lamella suspendome has better structural performance if the ratio of rise to span is small. If construction models have no special requirements, equilateral polygon suspendome and the reticulated shell forms of ellipse-like suspendome with irregular boundaries adopt forms of cut surfaces of sphere, ellipsoid surface and elliptic paraboloid surface.
引文
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