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基于4个比例为1:2的H型钢混凝土柱在单调荷载下的复合受扭试验,运用ABAQUS建立相应的有限元分析模型。通过对比开裂扭矩、极限扭矩和扭矩-扭率曲线,验证了有限元分析在型钢混凝土复合受扭性能研究方面的有效性,分析了轴压比、扭弯比和混凝土强度对型钢混凝土柱复合受扭性能的影响。研究结果表明,提高轴压比可提高型钢混凝土柱的极限扭矩,但对其后期延性不利;扭弯比的减小使弯曲损伤加大,对于构件极限抗扭不利;提高混凝土强度可提高构件的极限扭矩,但后期延性变差。
Based on the composite torsion test of four H-section steel columns with a ratio of 1: 2 under monotonic loading, a corresponding finite element analysis model was established by ABAQUS. The effectiveness of finite element analysis in the study of the composite torsional behavior of SRC was verified by comparing the cracking torque, ultimate torque and torque-torsion curve. The effects of axial compression ratio, twist ratio and concrete strength on SRC columns Effect of torsional properties. The results show that increasing the axial compression ratio can improve the ultimate torque of SRC columns, but it is unfavorable to the ductility of the SRC columns. The decrease of the bending ratio increases the bending damage, which is unfavorable to the ultimate torsional resistance of the members. Ultimate torque, but the late ductility deteriorates.