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从Von Mises屈服准则和双剪统一强度理论出发,对钢管和核心混凝土的受力性能进行分析.从核心区混凝土所受侧向压应力的角度出发,基于大量实验数据,得到核心区混凝土约束系数计算公式.从而完善了钢管混凝土柱的轴心受压承载力计算公式,使公式的精确性和适用性有所提高.所得计算结果与试验结果吻合良好,并与目前公式的计算结果进行对比,说明所提出公式的合理性.从尺寸大小和材料强度两个方面,对钢管混凝土柱承载力的影响因素进行探讨.
Based on Von Mises yield criterion and double shear unified strength theory, the mechanical behaviors of steel tube and core concrete are analyzed.From the point of lateral compressive stress of concrete in core area, based on a large amount of experimental data, the restraint coefficient Thus the formula of axial compressive bearing capacity of CFST column is improved and the accuracy and applicability of the formula are improved.The calculated results are in good agreement with the experimental results and compared with the calculation results of the present formula, The rationality of the formula is demonstrated.From the aspects of size and material strength, the factors affecting the bearing capacity of CFST columns are discussed.