北京光华路SOHO2采光顶双向张弦结构设计探讨
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朱礼敏，郭传军，杨晓蒙，刘枫，刘军进（中国建筑科学研究院建筑结构研究所， 北京 100013）［摘要］光华路SOHO2采光顶采用双向张弦结构，由于张弦桁架上弦杆采用了T形钢梁，这种截面形式在国内张弦桁架中尚属首次使用，对张弦桁架的找形分析、T形梁放置方向和节点形式等需要考虑和解决的主要技术问题进行探讨。为了既满足建筑造型，又符合结构受力，同时保证加工制作的经济性，建议T形梁水平放置、T形梁节点采用铸钢节点。本项目的施工张拉控制十分重要，施工前必须进行准确的施工模拟计算，及时进行施工监测，保证张拉过程的顺利完成。［关键词］张弦桁架； 找形分析； T形梁； 铸钢节点中图分类号：TU3933文献标识码：A文章编号：1002848X(2013)11008004Design on bidirectional truss string structure of skylight of SOHO2 on Guanghua road in BeijingZhu Limin, Guo Chuanjun, Yang Xiaomeng, Liu Feng, Liu Junjin(Institute of Building Structures, China Academy of Building Research, Beijing 100013, China)Abstract:Bi-directional truss string structure is adopted in the skylight of SOHO2 on Guanghua road in Beijing. As the top chords of the truss have Tshaped sections which appear firstly in truss string structures in China. The truss formfinding analysis, the layout direction and joint type of Tshaped beams are primary issues to consider and solve. To satisfy architectural requirements and structural demands as well as the economy, it is suggested that Tshaped beams should be placed horizontally and cast steel joints are preferred. The prestressed control of construction is very important. In order to finish the prestressed process successfully, the accurate construction simulation analysis is needed before construction and the timely monitoring is needed in construction.Keywords:truss string structure; formfinding analysis; Tshaped beam; cast steel joint作者简介：朱礼敏，博士，副研究员，一级注册结构工程师，Email：zhulimin@cabrtech.com。参考文献［1］GB 50009—2001建筑结构荷载规范 ［S］.2006年版. 北京：中国建筑工业出版社，2006.［2］JGJ 257—2012索结构技术规程［S］.北京：中国建筑工业出版社，2012.［3］GB 50017—2003钢结构设计规范［S］.北京：中国计划出版社，2003.
