三维退化梁单元在变截面梁分析中的应用

Application of 3-D Degenerated Beam Element in Analysis of Variable-section Beams

在20结点等参元的基础上,通过引入虚拟节点和“虚拟材料区”,形成三维实体退化虚拟层合单元,并将其应用于变截面梁的分析。计算实例表明,该单元收敛快,稳定性好,在单元数较少的情况下,具有较高的精度,可方便地应用于大型复杂结构如大跨度曲线梁桥的计算。

A degenerated three-dimensional solid virtual laminated beam is formed on the basis of 20-node, through the introduction of virtual node and 'virtual material zone', and is applied to the analysis of the variable-section beam. The numerical results show that the element has advantages of good convergence and stability, and higher precision in case of fewer elements. It can also be applied conveniently to the calculation of complicated large structures like the large span curve beam bridge.