一维离散有限元法计算箱形梁剪力滞效应

Analysis of shear lag effect in thin-walled box girders with one-dinensional dicrete finite element

本文以薄壁杆理论为基础,由能量变分原理出发,运用一维离散有限法推导出薄壁箱梁剪力滞效应计算的格式,从而将空间三维问题简化为一维离散计算模型.实例计算表明,此方法计算结果与变分法,有限元法等计算方法的结果相吻合.

On the basis of thin walled bars theory and the variational principle,The method of one dimensional discrete finite element is proposed in the calculation of shear lag effect in thin walled box girders.This methods is applied to two examples,the results are compared with those worked out by the variational theory and the conventional FEM,respectively,which shows desirable agreement.