弦支穹顶结构的形态分析  

Morphological analysis of suspend domes

作　　者：魏德敏[1] 吴俊润 

机构地区：[1]华南理工大学土木与交通学院亚热带建筑科学国家重点实验室,广东广州510640

出　　处：《空间结构》2017年第2期30-34,83,共6页Spatial Structures

基　　金：亚热带建筑科学国家重点实验室自主研究项目(2012CZ23)

摘　　要：应用张力补偿法和逆迭代法对大跨弦支穹顶结构进行形态分析,通过与相关工程数据对比,验证了本文结构形态分析方法的有效性.对考虑或不考虑上部单层网壳结构的下部张拉体系形态分析方法的计算效率和精度进行了对比,给出针对弦支穹顶结构形态分析步骤的建议,并分析了自重及固有恒载对结构找力结果的影响.研究发现,可以仅对下部张拉体系进行找力分析,结构自重对找力结果影响较大.Tension compensation method and inverse iteration method are used to determine the initial shape of suspend domes.Effectiveness of the methods is verified through comparison with some data of practical engineering.The efficiency and accuracy of two morphological analysis methods that consider the influence of the upper structure are compared.Based on the comparison,steps of form-finding method of suspend domes are suggested.The influence of its self weight and the inevitable dead load on analysis results is also investigated.It is found that the force-finding analysis only for the tensioning system is valid,and influence of the structural self weight on the force-finding result is evident.

关 键 词：弦支穹顶 形态分析 张力补偿法 重力影响 

分 类 号：TU394[建筑科学—结构工程]