A unified formulation for hollow and solid concrete-filled steel tube columns under axial compression
A unified formulation for hollow and solid concrete-filled steel tube columns under axial compression
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DOI：
10.1016/j.engstruct.2009.12.031
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发表时间：
2010-04
影响因子：
5.5
通讯作者：
Min Yu;X. Zha;Jianqiao Ye;Chunyan She
中科院分区：
文献类型：
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作者：
Min Yu;X. Zha;Jianqiao Ye;Chunyan She
基于弹性力学理论，提出了圆钢管混凝土柱复合抗压强度的统一计算公式。该公式是由弹性复合材料圆柱在轴压作用下的解析解得到的。通过引入相关系数对公式进行了进一步校正，并通过试验验证了相关系数的正确性。根据Perry-Robertson公式推导了钢管混凝土轴心受压长柱的稳定系数。新推导的稳定承载力公式适用于空心和实心钢管混凝土柱，通过与试验结果的比较再次验证了这一点。新公式的重要特征之一是，它们为空心和实心CCFST柱提供了一个统一的公式，该公式将CCFST柱的抗压强度或稳定能力与一系列设计参数联系起来。
On the basis of the theory of elasticity, a unified formulation is proposed in this paper to predict the composite compressive strength of circular concrete-filled steel tube (CCFST) columns. The formula is obtained from the analytic solution of an elastic composite cylinder under axial compression. The formula is further calibrated by introducing a number of correlation coefficients that are validated by test results. Furthermore, the stability factor of CCFST long columns under axial compression is derived on the basis of the Perry–Robertson formula. The newly derived formulas of stability bearing capacity are applicable for both hollow and solid CCFST columns, which is again validated through comparisons with experimental results. One of the important features of the new formulas is that they provide a unified formulation for both hollow and solid CCFST columns that relates the compressive strength or the stability capacity of a CCFST column and a series of design parameters.