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为研究钢骨-圆钢管高强混凝土组合柱偏心受压力学性能,采用有限元软件ABAQUS对14根钢骨-圆钢管高强混凝土组合柱偏心受压试件进行非线性分析,研究了荷载-侧向挠度曲线特征、不同受力阶段的应力分布规律及破坏模态,进行参数分析,讨论不同参数对组合柱偏心受压力学性能的影响.提出组合柱偏心受压承载力简化计算公式,并将简化公式计算结果与试验结果及有限元计算结果进行对比.编写了钢骨-圆钢管高强混凝土组合柱偏心受压数值分析程序.结果表明组合柱的偏心受压承载力随着偏心距、长细比以及径厚比增大而不断减小,随着配骨指标增大不断提高.简化计算公式计算结果及数值计算结果,与试验结果及有限元模拟结果吻合良好.
In order to study the mechanical behavior of SRC columns under eccentric compression, the finite element software ABAQUS was used to analyze the nonlinear behavior of 14 SRC columns subjected to eccentric compression. The effects of load-lateral Deflection curve characteristics, stress distribution law and failure modes in different stress phases, the parameter analysis is carried out, and the influence of different parameters on the mechanical properties of composite column under eccentric compression is discussed. A simplified calculation formula of eccentric compression bearing capacity of composite column is proposed, Formula calculation results are compared with the test results and the finite element calculation results.The numerical analysis program of the eccentric compression of steel-steel tube columns with high strength concrete is prepared.The results show that the eccentric compression bearing capacity of the composite columns with eccentricity, slenderness ratio As well as the diameter-to-thickness ratio increased and decreased continuously, with the increase of the index of the bone-growing, the calculation of the simplified formula and the numerical result were in good agreement with the experimental results and the finite element analysis.