红土创新广场陡角度斜交网格塔楼结构设计
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（悉地国际设计顾问(深圳)有限公司， 深圳 518048）
［摘要］红土创新广场采用钢管混凝土斜交网格外框架+单向伸臂+混凝土核心筒结构体系。通过研究分析平面的各种角度相交网格的外框，得到外框柱网的主要性能；通过比较分析伸臂和带状桁架的布置对抗侧刚度的贡献，确定了伸臂和带状桁架的数量，以最优的布置达到良好的结构性能；针对在重力作用下斜柱引起的楼盖水平轴力，分析了楼面梁的最大拉力和压力，为楼面梁的设计提供依据；对重要的伸臂K形节点、立面斜柱交叉节点进行了精细的有限元计算分析，并提出了加强措施，保证了强节点弱构件；进行了结构动力弹塑性分析，定性地找出了结构的薄弱部位，并提出相应的加强措施。［关键词］超高层结构; 钢管混凝土; 斜交网格外框架; 伸臂; 斜柱交叉节点; 动力弹塑性分析; 有限元分析中图分类号：TU973 文献标识码：A 文章编号：1002-848X(2015)20-0008-05
Structural design of Hongtu Creative Square tower with steep diagrid columnsWu Guoqin, Fu Xueyi, Zeng Zhihe, Zhuo Jianrong(CCDI Group, Shenzhen 518048, China)Abstract: The main structural system for Hongtu Creative Square is constitution of CFST diagrid frame, one direction outriggers and reinforced concrete corewall. Based on the research on some kinds of different angle diagrid columns elevations, the main performance of diagrid columns was gained. After studying contribution of the outriggers and belt trusses to the structural lateral stiffness, the number and location of outriggers and belt trusses were optimized to achieve well structural performance. The maximum tension force and compression force of floor beams were analyzed considering the floor horizontal axial force due to the gravity of inclined columns, providing basis for design of floor beams. For important K-joints of outriggers and cross nodes of elevation inclined columns, the fine finite element analyses were carried out and the strengthening measures were put forward to ensure the strong joint and weak member. The structural dynamic elasto-plastic analysis was conducted to find out the weak parts of the structure qualitatively, and corresponding strengthening measures were put forward.Keywords:super high-rise building; CFST; diagrid frame; outrigger; intersection node of diagrid column; dynamic elasto-plastic analysis; finite element analysis作者简介：吴国勤，硕士，高级工程师，一级注册结构工程师，Email：wu.guoqin@ccdi.com.cn。
