板桁结构考虑局部屈曲空间计算的横向条带板段单元法

用有限个横向条带法构造了板桁组合结构板段考虑局部屈曲的空间位移模式。基于三维连续体的虚功增量方程，导出了横向条带板段单元的ＵＬ列式，并考虑了板段单元位形变化的影响。此计算方法自由度少，计算精度高，能用于大型板桁结构的几何非线性分析。文末计算了广东西江桥板桁组合结构模型梁，计算结果与实测结果吻合较好。

Transverse stripe deck beam finite element method of considering local buckling space calculation for plate-truss composite structure

In this paper, a space displacement field on considering the deck local buckling for the plate truss composite is constructed by using transverse finite stripe. The Update Lagrangian formulations of deck beam finite element in transverse stripe are induced based on the three dimensional continuum virtual work incremental equilibrium equation, and the effect of large deformation is taken into consideration. This method has high accuracy and less degrees of freedom, especially for geometric non linear analysis of large plate truss composite structure. In the end of this paper. Guang Dong Xi Jian plate truss composite structure model steel bridge is calculated, the results are very close approximation to the test data.