连续加腋箱梁桥有限条法分析

Analysis of continuous haunched box girder bridge by the finite strip method

文章探讨有限条法在变高度梁桥结构分析中的应用 ,克服有限条法不能解决变截面结构的局限性。通过建立新型位移函数 ,推导 3种类型板 (壳 )条的单元刚度矩阵 ,按一般有限条法步骤 ,编制成程序 FSVM。通过算例论证 FSVM程序分析连续加腋箱梁桥 ,具有可接受的精度。

In this paper,the structure of varied height girder bridge is studied by the finite strip method,overcoming the limitation that the finite strip method is not used in the structure of varied cross section.A new kind of displacement function is established, unit stiffness matrixes of three types of plate (shell) strip are deduced, and the program FSVM is made according to the step of common finite strip method. Finally, a continuous haunched box girder bridge is analyzed as an example through the program FSVM,and the result is of acceptable precision.