钢管混凝土柱环梁节点非线性有限元分析

NONLINEAR-FINITE-ELEMENT STUDY ON REINFORCED CONCRETE RING BEAM JOINT FOR CONCRETE-FILLED-STEEL-TUBE COLUMN

采用ANSYS有限元软件建立钢管混凝土柱环梁节点三维实体模型,对节点模型的变形、应力应变情况、开裂状态进行非线性分析。结果表明,有限元分析结果与试验结果吻合较好,指出了环梁破坏的3种形式,并提出适当的框架梁-环梁配筋比可以控制节点破坏形态,对设计此类节点有较好的参考价值。

A 3D finite element model of reinforced concrete ring beam joint was established through ANSYS for simulating concrete-filled steel tube joints, the thesis investigates the joints model on the distortion, stress-strain situation and cracking condition. The results show that the finite dement results agree well with those of the test; and the three failure forms of the ring beam were pointed out and the appropriate ratio of frame beam-ring beam reinforcement can control the failure form of nodes, which provide a better reference value for design of similar nodes.