穿心暗牛腿钢管混凝土柱单梁节点空间非线性有限元分析

钢管混凝土柱与梁的节点构造和受力分析是钢管混凝土柱研究与应用的关键技术。利用“Ansys”有限元分析软件 ,对穿心暗牛腿钢管混凝土柱与现浇钢筋混凝土梁的单梁节点进行了空间非线性有限元分析 ,研究了垂直对称荷载作用下该节点内的应力分布情况和内力传递机理 ,并与试验结果进行了比较 ,结果表明 ,建立的有限元模型较为准确地揭示了结构的实际受力特点。根据分析结果 ,给出了节点构造的改进意见

NONLINEAR 3D-FEM ANALYSIS OF SINGLE BEAM JOINTS OF CONCRETE FILLED STEEL TUBE COLUMN WITH STEEL BRACKETS THROUGH TUBULAR CORE

The beam joints of concrete filled steel tuble(CFST) and the forced analysis are the key technique for the study and application of CFST structure.Due to the importance of the constitution and performance under loads of beam joints of CFST column,many experimental studies were carried out.According to a column joint which has steel brackets through tubular core,a nonlinear 3D- FEM is presented in “Ansys” using the “combined” reinforced model and “smeared” cracking model.Under vertical and symmetrical load case the stress distributions and the mechanism of internal force transmission in the joint are studied.The well- agreement between experimental data and calculated result show that the FEM model accurately revealed the performance of the joint.According to the analyses,some advice is given to improve the joint constitution.