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在8根方钢管再生混凝土长柱偏心受压试件试验研究的基础上,利用有限元软件ANSYS建立了方钢管再生混凝土长柱偏心受压的计算模型。通过计算得出了荷载-位移曲线,分析了构件的变形性能以及长细比、偏心距等因素对极限承载力的影响,并将计算结果与试验结果进行了对比分析。结果表明:方钢管再生混凝土长柱偏压构件主要表现为整体失稳破坏;其偏压弹性刚度随长细比及偏心距的增大呈先增后减的趋势;延性及轴向耗能能力随长细比的增大呈先减后增的趋势,随偏心距的增大呈先增后减的趋势;构件极限承载力随长细比及偏心距的增大而减小;计算结果与试验结果吻合良好,能够较真实地反映试验结果,所建立的有限元模型能够有效地对方钢管再生混凝土柱偏压力学性能进行全过程分析。
Based on the experimental research on the eccentric compression test of 8 square steel tubular reclaimed concrete long columns, the finite element software ANSYS was used to establish the calculation model of the eccentric compression of the long columns of square concrete reclaimed concrete. The load - displacement curve is obtained by calculation. The deformation performance of the component and the influence of slenderness ratio and eccentricity on the ultimate bearing capacity are analyzed. The calculated results and the experimental results are contrastively analyzed. The results show that the long column bias members of square steel tube are mainly characterized by global instability failure. The biasing elastic stiffness increases first and then decreases with the increase of slenderness ratio and eccentricity. The ductility and axial energy dissipation capacity With the increase of slenderness ratio, the trend of decreasing first and then increasing tends to increase first and then decrease with the increase of eccentricity distance; the ultimate bearing capacity of components decreases with the increase of slenderness ratio and eccentricity; The experimental results are in good agreement with each other and can reflect the test results more accurately. The finite element model established can effectively analyze the whole process of the biomechanical properties of concrete-filled square steel tubular columns.