适时考虑索找力的索膜结构找形方法  

FORM-FINDING METHOD OF CABLE-MEMBRANE STRUCTURES CONSIDERING CABLE FORCE-FINDING FROM APPROPRIATE MOMENT

作　　者：赵冉[1] 王小平 魏德敏[3] 孙文波[4] 

机构地区：[1]中交四航工程研究院有限公司,广州510230 [2]中交四航局港湾工程设计院有限公司,广州510230 [3]华南理工大学亚热带建筑科学国家重点实验室,广州510640 [4]华南理工大学建筑设计研究院,广州510640

出　　处：《工业建筑》2013年第1期118-120,130,共4页Industrial Construction

基　　金：广东省自然科学基金项目(020940)

摘　　要：实际索膜工程的找形分析,不仅要得到稳定的结构形态,还要得到合适的索的预张力分布。基于非线性有限元找形理论,提出适时考虑索找力的索膜结构找形方法。首先根据是否考虑及何时考虑索找力,分3种情况对一个小品膜结构进行找形分析,发现只有适时考虑索找力的找形方法可以得到形态稳定、索张力分布合理的结构形态。然后采用新方法对大型索膜结构"佛山世纪莲花"体育场屋盖结构进行分析,发现新方法可以快速有效地对大型索膜工程进行找形和找力分析。Form-finding analysis of actual cable-membrane projects,does not only aim to find stable shapes,but also to find suitable cable pretension distribution.Based on the nonlinear finite element method pattern theory,it was proposed a method considering cable force-finding from the appropriate moment in the process of form-finding analysis.According to whether and when to consider force-finding of cables in the process of form-finding,three form-finding cases were considered.From analytic results,only the method considering cable force-finding from the appropriate moment could get a stable shape and a proper cable pretension distribution.Using the new method,the roof of a large cable-membrane stadium named Foshan Century Lotus was analyzed.It was found that the method could be used for the analysis of shape-finding and force-finding of large cable-membrane structures rapidly and effectively.

关 键 词：索膜结构 非线性有限元法 找形分析 找力分析 

分 类 号：TU399[建筑科学—结构工程]