摘要
采用基于纤维模型的分段分块的杆系结构有限元方法,推导了钢管混凝土压弯构件的弹塑性刚度矩阵,提出了计算钢管混凝土压弯构件弹塑性稳定承载力的计算模型,编制了相应的计算程序.采用提出的方法和程序,计算了圆管截面的钢管混凝土轴向受压、偏心受压长柱的弹塑性极限承载力,理论分析结果与文献报道的试验和理论结果吻合良好.
In this paper, an approach for the ultimate load analysis of the concrete-filled-steel-tube (CFST) beam-column is presented. Based on the fiber model of beam structure, the elastic and elasto-plastic stiffness matrix of the beam-colum element are deduced. And a FORTRAN program in which both the geometric and material non-linearity are taken into account, are developed. The elasto-plastic ultimate loads of columns and beam-column models with circular section are computed. The total load-deflection relation curves of columns are obtained. And the results show that the present results agree well with those by the previously experimental and numerical studies.
出处
《郑州大学学报（工学版）》
CAS
2003年第2期29-32,共4页
Journal of Zhengzhou University（Engineering Science）
