预应力对将台冬季花园拱壳杂交钢结构承载性能的影响分析  

ANALYSIS OF PRESTRESSING FORCE’S EFFECT ON BEARING CAPACITY OF ARCH-RETICULATED SHELL HYBRID STEEL STRUCTURE OF BEIJING JIANGTAI WINTER GARDEN

作　　者：石永久[1] 高阳[1,2] 王元清[1] 施刚[1] 卢凯 

机构地区：[1]清华大学土木工程系,结构工程与振动教育部重点实验室,北京100084 [2]华润置地(北京)股份有限公司,北京100035 [3]珠海晶艺玻璃工程有限公司,广东珠海519070

出　　处：《钢结构》2013年第7期1-4,45,共5页Steel Construction

基　　金：国家自然科学基金资助项目(51038006)

摘　　要：北京将台冬季花园采用较为复杂的杂交结构,主要组成构件有网壳杆件、主钢梁、主钢柱、拉索、玻璃幕墙,其中幕墙悬挂于竖向拉索之上。拉索为结构主要的竖向承重构件,因此拉索的预应力对结构的承载性能有十分重要的影响。选取具有代表性的单榀拱结构,研究随着拉索预应力的变化结构变形及内力的变化情况。此外还选定网壳的初始破坏状态,运用改变传力路径法对结构进行防连续倒塌分析。结果表明,主索对结构承载性能的影响更大,结构在设定的局部破坏状态下不会发生连续倒塌,整体性能良好。Beijing jiangtai winter garden adopts complex hybrid structure, and its main members are as follows： shell frames, main aches, main steel columns, steel cables and curtain wall fixed to the vertical cables. The cables are the main vertical bearing members, thus the prestressing forces have significant effect on the structure’s bearing behavior. This paper chose one representative single arch structure, analyzed the changes of displacements and internal forces with the changes of the cable’s prestressing forces. Besides, the paper chose the initial damage situation, adopted the usual alternate path method to conduct the anti-progressive collapse analysis. The results showed that the main cables had more effect on the structure, and the progressive collapse wouldn’t happen under the given local damage condition, so the structure had good integrity.

关 键 词：拱壳杂交结构 有限元分析 预应力 连续倒塌 承载性能 

分 类 号：TU391[建筑科学—结构工程]