尹海鹏，  施  泓，  史  杰，  马晓雷
   （中国建筑设计研究院，北京 100044）

[摘要] 应用ANSYS软件对深圳某高层钢．混凝土组合结构斜柱转换的钢管混凝土组合节点进行地震作用下的受力分析。根据节点的抗震性能化目标，采用恰当的材料本构关系，选取可能的节点最不利工况进行分析。得到计算分析的节点能够满足大震不屈服的抗震性能化目标；节点薄弱部分为杆件汇交的截面面积最小处，钢材的最大Mises应力出现在钢管的棱角部分，混凝土的最大主压应力则出现在钢梁的翼缘附近区域；钢梁在平衡节点弯矩的受力过程中起到有利作用，应对其适当加大。
[关键词] 钢管混凝土；组合节点；有限元
中图分类号：TU352.01    文献标识码：A  文章编号：1002-848X(2012) Sl-0746-04

Finite element analysis on concrete filled steel tube nodes of a high-rise structure
Yin Haipeng, Shi Hong, Shi Jie, Ma Xiaolei
( China Architecture Design ＆Research Group, Beijing 100044, China)

Abstract: The concrete filled steel tube nodes of a composite structure in Shenzhen have been studied, and finite element software ANSYS has been used for the seismic performance of them. A proper constitutive relation has been used in the analysis based the target of seismic performance and necessary computational accuracy, and the possible unfavorable conditions of the nodes have been considered. The analysis results show that all of the nodes can meet the seismic performance objectives, the most dangerous parts of the nods are the smallest cross-sectional area. The nodes have maximum Mises stress in steel tube concrete corner portion, and maximum principal compressive stress of concrete appears in the steel flange area. Steel beams are good for the balance of moment, and they should be strengthened.
Keywords: concrete filled steel tube; composite node; finite element