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在合理选取钢材和混凝土材料本构关系模型的基础上,采用有限元分析软件ABAQUS对部分圆形截面的钢管混凝土受弯构件以及2个内置十字钢骨圆钢管混凝土构件的受弯性能试验进行有限元模拟,并设计内配十字钢骨圆钢管混凝土受弯构件,研究其在荷载作用下的受力特征,并进行混凝土强度、钢管及钢骨屈服强度、钢管及钢骨截面含钢率等参数分析。结果表明:典型受弯构件的挠度曲线近似为正弦半波曲线;弯矩-曲率曲线大致可分为弹性段、弹塑性段和塑性强化段;钢管截面含钢率对构件受弯承载力的影响比较显著,型钢材料强度对其影响很小。
Based on the rational selection of the constitutive model of steel and concrete, the finite element analysis software ABAQUS was used to test the flexural behavior of partially filled circular-concrete filled steel tubular members and the two built-up CFRP-CFST members Element simulation and the design of the cross-section steel tube CFR flexural members were carried out to study the mechanical characteristics under load. The concrete strength, the yield strength of steel tube and steel, the steel content of steel tube and steel section analysis. The results show that the deflection curve of a typical flexural member is approximately a sinusoidal half-wave curve. The bending moment-curvature curve can be roughly divided into elastic section, elastoplastic section and plastic reinforced section. The effect of the steel content in the section of steel tube on the flexural bearing capacity More significant, steel material strength has little effect on it.