(深圳市华阳国际工程设计股份有限公司, 深圳 518045)

摘要: 昆明某连体天幕为高烈度区连接超高层塔楼及商业裙房的大跨度连体钢桁架,其中塔楼采用钢筋混凝土框架-剪力墙结构体系,商业裙房采用钢筋混凝土框架结构体系. 对连体桁架与主体结构不同连接方式进行了对比,发现采用摩擦摆滑动支座进行连接可显著减小对塔楼相关构件内力的影响. 对结构进行了弹性分析和非线性屈曲稳定分析,对关键节点采用性能化分析方法. 同时,通过大震弹塑性分析,支座最大滑动量满足其性能要求,并针对结构薄弱环节进行加强. 对关键节点进行了有限元分析,验证了节点的可靠性,计算结果均满足结构安全性要求.

关键词: 大跨钢结构; 连体天幕; 摩擦摆; 多尺度法; 性能化分析方法

中图分类号:TU318 文献标志码:A 文章编号:1002-848X(2022)03-0038-05

DOI:10. 19701 / j. jzjg. LS201848

Steel structure design for a large-span conjoined sky curtain in Kunming

LI Wenbin

( Shenzhen Capol International & Associates Co., Ltd., Shenzhen 518045, China)

Abstract: A conjoined sky curtain in Kunming is a large-span conjoined steel truss connecting a super high-rise tower anda commercial podium in a high-intensity area. The tower adopts a reinforced concrete frame-shear wall structural system,and the commercial podium adopts a reinforced concrete frame structural system. The different connection methods of theconnected truss and the main structure were compared, and it was found that the friction pendulum sliding bearing was usedfor connection, which can significantly reduce the influence on the internal force of the related components of the tower.The elastic analysis and nonlinear buckling stability analysis of the structure were carried out, and the performance analysismethod was adopted for the key nodes. At the same time, through the elastoplastic analysis of large earthquakes, themaximum sliding amount of the bearing meets its performance requirements, and the weak links of the structure werestrengthened. The finite element analysis of the key nodes had been carried out to verify the reliability of the nodes, and thecalculation results meet the structural safety requirements.

Keywords:large-span steel structure; conjoined sky curtain; friction pendulum; multiscale method; performance analysismethod

第一作者:李文斌,学士,高级工程师,一级注册结构工程师,从事建筑结构设计研究,Email:liwenbin@ capol. cn.

[引用本文] 李文斌. 昆明某大跨连体天幕钢结构设计 [ J] . 建筑结 构,2022,52 ( 3) :38-42. LI Wenbin. Steelstructure design for a large-span conjoined sky curtain in Kunming[ J] . Building Structure,2022,52(3) :38-42.