Research on Decoupling Analysis Method for Shear Flexural Behavior of Thin-walled Beams

被引：0

作者：

Zhou M. ^{[1
,2
]}

Lin P. ^{[2
]}

Zhang Y. ^{[2
]}

机构：

[1] Department of Civil Engineering, Gansu Agricultural University, Lanzhou

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

来源：

Tiedao Xuebao/Journal of the China Railway Society | 2023年 / 45卷 / 11期

关键词：

decoupling analysis; shear deformation; simplified method; thin-walled beam; warping correction factor;

D O I：

10.3969/j.issn.1001-8360.2023.11.021

中图分类号：

学科分类号：

摘要：

In order to obtain the flexural stress and displacement of thin-walled beams quickly and accurately, a new method for flexural analysis of thin-walled beams was proposed considering the influence of the shear deformation of each slab. Starting from the relationship between the shear strain and displacement of the thin-walled slab, the flexural longitudinal displacement function with a clear mechanical mechanism was derived. The deflection caused by shear deformation was selected as the generalized displacement and a simplified analysis method of shear warping stress and deflection was proposed by decoupling deflection behavior. Based on the plane stress solution of the rectangular strip, the expression of the warping stress correction factor for the flange was derived. Then, using the deformation continuity condition of the middle support point and the simplified analysis theory, a simplified analysis method was proposed for the shear deflection of thin-walled continuous beams. The numerical example results show that the maximum error between the stress results obtained by this method and the 3D FEM results is within 3%, with the maximum error of deflection within 6%, indicating the reliability and accuracy of the proposed method. The parameter analysis shows that material Poisson's ratio and the slab width ratio have a great influence on the warping stress of the flange. © 2023 Science Press. All rights reserved.

引用

页码：181 / 188

页数：7

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