双向偏心受压钢筋混凝土柱稳定性分析

Stability Analysis of Bieccentric Compressive Reinforced Concrete Column

文中给出钢筋混凝土柱承受双向偏心压力时分析其承载力和稳定性的标准有限元公式。公式同时考虑了钢筋、混凝土材料非线性和几何非线性特点，单元刚度表达成材料非线性刚度与几何非线性刚度的简单叠加。在钢筋混凝土双向偏心受压柱极限承载力分析中既考虑了柱变形对稳定性的影响，也考虑了材料非线性对柱刚度的削弱。计算机分析结果与实验结果符合较好。

The standard finite element formulations of stability and capacity analysis of bieccentric com- pressive reinforced concrete column are derived in this paper, which take into account the rein- forcement and concrete material nonlinearity and geometrical nonlinearity simultaneously . The elemental stiffness matrices are the simple superposition of the materials stiffness matrices and geometrical stiffness matrices . Its ultimate capacity includes the decrease of the column stiffness due to the effect of stability and materials nonlinearity . The computational results and experimen- tal data correspond well.