（1 中建国际(深圳)设计顾问有限公司，深圳 518033； 2 哈尔滨工业大学深圳研究生院，深圳 518055）
［摘要］国外某工程，外部网筒由圆柱斜向交叉与环梁编织而成,外网筒柱节点核心面积相比柱截面面积大幅减小,承载力不足,经有限元分析,汇交节点应力状态复杂,阴角区存在明显的应力集中,通过弹性、弹塑性有限元分析,找出了应力集中的原因,进而有针对性地提出了采用钢板凳进行加强的措施，取得了较好的效果。
［关键词］外网筒；斜柱交叉节点；应力集中；有限元；钢板凳
Design and research on the diagrid columns cross node of a high-rise office building
Fu Xueyi1, Jiang Huabing1, Sun Can2(1 China Construction Design International，Shenzhen 518033,China; 2 Harbin Institute of Technology, Shenzhen 518055,China)
Abstract:In a high-rise office building structural system, the exterior tube, composed by reinforced concrete diagrid columns and ring beams, is the most important main structure. In the core area of the node crossed by two diagrid columns, the node section area is far smaller than the sum of two columns’ section areas. Therefore, the carrying capacity of the original reinforced concrete cross node is not sufficient. The elastic and plastic FEM analysis result shows that the stress in the cross node section is very complicated, and there is distinct stress concentration. By researches, the cause of stress concentration is found, and one effective measure—strengthening the cross node by steel bench is presented. The novel node design method has been proved well by the experiment and actual project application.
Keywords:exterior tube; diagrid columns cross node; stress concentration; FEM; steel bench
作者简介：傅学怡，研究员，Email：fu-xue-yi@yahoo.com.cn。
参考文献
［1］BS8110-1：1997,BS8110-2：1985英国钢筋混凝土规范［S］.
［2］江见鲸，陆新征，叶列平.混凝土结构有限元分析［M］.北京：清华大学出版社，2005.
［3］龚曙光，谢桂兰.ANSYS操作命令与参数化编程［M］.北京：机械工业出版社，2004.