Analysis on Shear Lag Effect of Box Girder Based on Lateral Displacement Mode of Flanges

被引：0

作者：

Zhang Y. ^{[1
]}

Ma X. ^{[1
]}

Zhang Y. ^{[1
]}

Zhang H. ^{[1
]}

机构：

[1] School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou

来源：

Tiedao Xuebao/Journal of the China Railway Society | 2024年 / 46卷 / 05期

关键词：

box girder; end restraint condition; lateral displacement of flanges; section parameters; shear lag;

D O I：

10.3969/j.issn.1001-8360.2024.05.020

中图分类号：

学科分类号：

摘要：

Based on the analysis of the shear warping deformation state, the lateral displacement mode for flanges of a box girder was proposed by comprehensively applying the generalized coordinate method, the coordination conditions of shear warping deformation and equilibrium differential equations. Based on the principle of minimum potential energy stationary value, an analytical solution for shear lag in box girder was derived considering the influence of lateral displacement of flanges. By introducing the difference ratio of the influence of the lateral displacement of flanges on the shear lag, the influences of the section parameters and the end restraint condition on the difference ratio for shear lag were analyzed in detail. The numerical analysis shows that the lateral displacement of flanges has a certain weakening effect on the shear lag, and the longitudinal stress considering the lateral displacement is better consistent with the finite element solution and measured values. The larger the span width ratio and height width ratio, the smaller the difference ratio for shear lag. The larger the width of cantilever plate, the smaller the difference ratio for shear lag coefficient. The stronger the end restraint conditions, the steeper the distribution curve of shear lag difference ratio. When the end restraint conditions are strong, the influence of lateral displacement should be considered. © 2024 Science Press. All rights reserved.

引用

页码：171 / 178

页数：7

共 20 条

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