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采用ABAQUS有限元软件建立了圆钢管混凝土柱有限元模型,选用合理的本构模型,研究了钢管和核心混凝土的应力分布情况和破坏发展进程,分析其在轴向拉压反复荷载作用下的受力性能。分析了不同材料强度、径厚比等因素对构件轴向反复荷载下受力性能的影响。研究表明:圆钢管混凝土柱具有较好的弹塑性变形能力和耗能能力,轴向抗震性能较好;材料强度对轴向承载力影响较大;径厚比对轴向承载力和刚度均有较大影响。
The finite element model of CFST column was established by using ABAQUS finite element software. The reasonable constitutive model was adopted to study the stress distribution and failure process of steel tube and core concrete. The influence of axial load Force performance. The influence of different material strength, diameter to thickness ratio and other factors on the mechanical behavior under axial cyclic loading was analyzed. The results show that the CFST columns have better elastic-plastic deformation ability and energy dissipation capacity, better axial seismic performance, higher strength of the material, and greater axial load-carrying capacity and stiffness Great impact.