钢管混凝土柱稳定分析的有限单元法

The Finite Element Analysis on Stability of Steel Pipe-Concrete Pillar

文中在三维块体等参元中引入梁的假定,建立三维块体层合梁单元的有限元列式,并考虑几何非线性,给出用于层合梁(柱)稳定性分析的有限元方程,计算出钢管混凝土柱线弹性屈曲的临界荷载。

Based on 3-D iso-parameter element and combining with beam assume and layer integration , we proposed the degenerated 3 dimensional laminated beam element concerning geometrical nonlinear, which can be used for analysis on critical load of linear - elastic buckling of steel pipe - concrete pillar. All the applications and results of them elucidate that the method and the elements presented in the paper are more effectively than much of the others. As a result, the method is a prospective method and is especially well applied to overall analysis in engineering problems.