中文摘要：

采用子结构方法研究超限高层建筑复杂节点的受力性能。基于ABAQUS有限元软件子结构方法,建立某超限高层的整体模型和复杂节点的精细模型,整体模型梁柱单元采用开发的纤维模型,剪力墙采用塑性损伤模型;复杂节点的精细模型中,实体单元采用混凝土塑性损伤模型,钢筋与型钢采用采用双线性动力硬化模型,该复杂节点采用两种结构形式：型钢混凝土结构和钢管混凝土结构。通过子结构方法提取整体模型中复杂节点处的小震、中震、大震下的位移边界条件,对节点进行精细化的有限元分析。结果表明：该复杂节点在大震作用下,混凝土的最大压应变已超过规范限值;型钢和钢筋均已进入塑性阶段,但都未超过各自的极限应变,节点尚处安全阶段。通过分析,可以直观地比较两种节点的优劣,为超限高层建筑的节点设计提供参考。

英文摘要：

The force performance of the complex node in overrun high-rise structure is studied. Based on the substructure method of ABAQUS finite element software, the whole model and the fine model of the complex node are set up in one project. In the whole model, the fiber model is developed to beam-column elements, and the plastic damage model is used to shear wall. In the fine model of the complex node, the plastic damage model is used to solid elements, the metal double linear dynamic hardening model is used to steel and reinforcement. The complex nodes use two kinds of structure＇s form： steel reinforced concrete and steel tube＇s concrete. The displacement boundary conditions under the cases of small earthquakes, middle seismic and strong earthquakes of the complex node are extracted from the whole model by the substructure method. It is the time to run the finite element analysis of the fine model of the complex node in ABAQUS and it will obtain the analysis result. The results show that the largest compressive strain of concrete has been more than standard limits under the strong earthquakes. Steel and reinforcement have already been in the inelastic phase, but not more than their limit strain, so the nodes are still in the secure stage. Which kind of node is more advantageous is quite clear through the analysis and comparison. This can provide some references for the design of the complex node in the overrun high-rise structure.