（1 天津大学建筑设计研究院， 天津 300073； 2 天津大学建筑工程学院， 天津 300072;3 中国建筑西南设计研究院有限公司， 成都 610042； 4 天津市建筑设计院， 天津 300074)

［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。

［关键词］类椭圆形； 正多边形； 弦支穹顶； 结构选型

中图分类号：TU393-3文献标识码：A文章编号：1002-848X(2019)04-0001-06

Structural system selection analysis on ellipse-like and equilateral polygon suspendome

Yu Jinghai1,2, Yan Mingting2, Han Fengqing2, Wang Shaohua3， Yan Xiangyu1， Huang Zhaowei4

(1 Architectural Design and Research Institute of Tianjin University, Tianjin 300073, China;2 School of Civil Engineering, Tianjin University, Tianjin 300072, China;3 Southwest China Architectural Design & Research Institute Co., Ltd., Chengdu 610042, China；4 Tianjin Architecture Design Institute， Tianjin 300074，  China)

Abstract: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.

Keywords:ellipse-like; equilateral polygon; suspendome; structural system selection

*天津市科技支撑计划项目（13ZCZDSF01400）。

作者简介：于敬海，博士，研究员，一级注册结构工程师， Email：13302190626@163.com。