波形钢腹板变截面梁剪力滞的差分解

Difference solution on beam of corrugated steel webs with variable cross-section

基于波形钢腹板变截面形式逐步出现,针对其剪力滞的求解,提出对波形钢腹板变截面简支梁桥的剪力滞的分析,利用差分法建立矩阵方程[G]{U}=[F'(x)],然后对F'(x)求解,得到U,进而求得各个截面的剪力滞,分析其分别在集中荷载,均布荷载的作用下其剪力滞纵向分布情况,并利用有限元建立模型进行对比分析,结果表明二者能很好的吻合。

Based on the construction of corrugated steel web bridge, its form of variable cross-section gradually appear, for shear lag solving, analy-sis on the corrugated steel webs variable cross-section simply supported beam bridge shear lag. Using the difference method to build matrix equation [G]{U}=[F ＇（x）], then solving the F＇（x） and U to obtain the cross-section of the shear lag. To solve the shear lag longitudinal distribution under the action of concentrated load and uniformly distributed load and to compare the result of finite element modeling. The results show that they have a good agreement.