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采用ABAQUS分别建立3个方钢管混凝土柱以及6个钢管混凝土柱-钢梁穿筋节点的模型,分析了在温度作用、竖向荷载和水平荷载作用下荷载比、钢筋强度、含钢率、轴压比等参数对穿筋节点的影响规律。研究表明:荷载比、含钢率和轴压比对耐火极限和临界温度影响较大,钢筋强度几乎无影响。
ABAQUS was used to establish the model of three concrete-filled square steel tubular columns and six concrete filled steel tubular columns filled with steel bars respectively. The effects of temperature, vertical load and horizontal load on the load ratio, strength of steel, steel ratio, Pressure ratio and other parameters of wear tendons nodes influence law. The results show that the load ratio, steel ratio and axial compression ratio have great influence on the fire resistance and critical temperature, and the strength of rebar has almost no effect.