基于空间斜梁单元斜梁桥结构计算的有限单元法

斜梁桥结构计算中,由于斜交角而使其更加复杂。吸取梁段单元的思想,将斜交箱梁沿纵向划分为若干斜梁段,在位移分析的基础上,通过正、斜交坐标转换关系,直接建立在斜交坐标系内描述单元空间位移的方法,用势能驻值原理推导斜梁单元刚度矩阵并建立其有限单元列式,利用编制的有限元程序进行斜交结构的分析。结果表明:本文计算简单精度较高。

Ramp Space-based Beam Element The Finite Element Method Of Oblique Bridge Structure Calculation

As a result of oblique angle,the calculation of oblique beam bridge structure is more complex.Draw the idea of beam unit,the bias along the vertical box is divided into a number of oblique beam.On the basis of analysis of the displacement,through positive and oblique coordinate transformation relations,and direcdy built on the oblique coordinate system to describe the methods of displacement unit space.With potential energy principle is derived in oblique beam element stiffness matrix and the establishment ...