曲线薄壁箱梁的空间受力分析

3-Dimensional Finite Element Analysis of Curved Thin-walled Box Girders

以曲线薄壁箱梁的翘曲扭转理论和微分几何为基础 ,导出了曲线箱梁的应变一位移关系 .基于能量原理 ,通过引入单元变形模式 ,建立了相应的有限元列式 ,给出了曲线箱梁单元刚度矩阵及等效节点荷载列阵 .数值算例结果表明 ,该理论正确 ,方法简单。

The strain displacement relationship of curved box girder,which is based upon the differential geometry and the theory of warping and torsion of thin walled curved box girders,is derived in this paper.By means of the energy principal,and the element sfiffness matrix of curved box girder and the equivalent nodal load column matrix are established of this paper element deformation model.The numerical results show that the theory presented in this paper is correct,easy and practical.