基于比拟杆法建立了单箱三室薄壁箱梁剪力滞效应控制微分方程.借助RStdio运行环境,采用R语言编程研究了三室薄壁箱梁截面加劲杆沿着梁跨方向的剪力流数值分布;探究了比拟杆分析三室箱梁剪力滞效应的精度,基于有机玻璃制作的三室简支薄壁箱梁,截面设置了3种加劲杆数量工况,采用有限元模拟与理论解对比得出:截面加劲杆数量越多,求解精度越高且无限接近有限元计算结果,加劲杆数量工况1即能满足工程结构设计配筋的精度要求.%Based on the analogy bar method ,this paper established the control differential equation of shear lag effect for triple cells thin-walled girder .Based on means of R-Stdio operating environment ,the numerical distribution of shear flow along beam span direction for triple cells thin-walled girder section each analogy bar is researched with using R-language programming .In order to research the analogy bar precision to shear lag effect of triple cells thin-walled girder .Based on the triple cells thin-walled girder which is made of organic glass ,the triple cells thin-walled girder section is installed three kinds of stiffener number conditions .By comparing the finite element solution with the theoretical solution ,the re-sults show that the more the section bar number is the higher the accuracy of the solution is .The first condition is able to fulfill the requirements of the design and reinforcement calculation of the engineering structure .
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