钢管混凝土柱-钢筋混凝土梁节点受力性能分析

Mechanical performance analysis of concrete-filled steel tube column-reinforced concrete beam joints

提出了一种新型开大孔的穿筋式梁柱节点,采用通用有限元软件ABAQUS对其进行柱顶竖向加载、梁端单调加载和循环加载作用下的受力性能分析;结果表明,该节点受力性能良好,满足“强节点弱构件”的抗震设计要求。以单调加载为基础,研究了轴压比、节点核芯区钢管壁厚和核芯混凝土强度对节点受力的影响;对比分析表明:节点核芯区钢管壁厚和轴压比对节点承载力影响较大,核芯混凝土强度则对节点承载力影响较小。本文提出的新型开大孔的穿筋式梁柱节点设计与研究成果可供类似项目参考。

A new type of through-reinforced beam-column joint with large holes is proposed in this paper,and its mechanical behavior under vertical loading on the top of the column,monotonic loading and cyclic loading at the end of the beam is studied by ABAQUS FEA.The results show that the beam-column joint has a good mechanical performance,and the request of“strong joint and weak member”in seismic design can be achieved.Based on monotonic loading,the effects of axial compression ratio,steel tube wall thickness and core concrete strength on the mechanical properties of joints are studied.The results show that the axial compression ratio and the steel tube wall thickness in the core area of the joint have a great influence,while the strength of the core concrete has little effect on the bearing capacity of the joint.The design and research work of beam-column joint in this paper can provide a reference to similar projects.