Nonlinear three-dimensional finite element analysis of four through-beam-type interior RCS beamcolumn connections is performed by the finite element software ABAQUS and the analytical results are compared with experimental results.A series of numerical simulation technologies is studied,such as selecting element type,defining material model of steel and concrete,setting solution control options and solving module.The investigation shows that ABAQUS may simulate the behavior of RCS beam-column connections under static loading through reasonably selecting parameters,and the analytical results agree well with experimental ones.The research is mainly focused on considering 3-D constraint included slab and orthogonal direction beam that have much effects on the performance of the RCS composite joints.The effects of different parameters,such as axial force ratio,concrete strength,slab width,steel shear web thickness etc.,were analyzed and several modifications are recommended.%借助ABAQUS有限元分析软件,对4类“梁贯通”式RCS组合梁柱中节点进行三维非线性有限元分析.对单元类型的选取、材料模型的定义、模型求解等数值模拟技术进行研究.研究表明,通过合理设置参数,ABAQUS有限元软件能够模拟RCS梁柱节点在静力荷载作用下的性能,与试验结果吻合较好.重点研究了考虑楼板、纵横梁构件空间约束作用对RCS组合节点受力性能的影响,比较分析轴压比、混凝土强度、楼板宽度、型钢梁腹板厚度等参数对RCS组合节点受力性能的影响,并提出相关的结构设计建议.
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