建立斜拉索单元刚度矩阵的等效线性化方法

Equivelent linearization method for setting up stayed-cable element stiffness matrices

用线性化方法建立斜拉索单元刚度矩阵,其单元刚度矩阵范数和张力增量与拟弹性模量方法的结果具有很好的一致性.对一斜拉索平面桁架算例进行分析,结果表明线性化方法所建立的斜拉索单元刚度矩阵与拟弹性模量方法具有同样精度,说明本文方法是有效的,可用于大型结构的有限元分析中.

The equivalent linearization method was used to establish the cable-stayed element stiffness matrices. It was found that the norm of cable-stayed element stiffness and the cable-stayed tension was in agreement with the corresponding using pseudo elastic modulus method. Analysis of a stayed-cable plane truss using equivalent linearization method showed that the matrices established with both methods were of high similarity,implying that the method we set up in the present was effective and could be applied to finite element analysis for large-scale structures.