Analytic Method for Shear Lag Effect of Box Girders Under Concentrated Bending Moments

LIN Peng-zhen; YANG Zi-jiang; SUN Li-xiang>; JI Wei

doi:10.3879/j.issn.1000-0887.2014.07.004

Volume 35 Issue 7

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LIN Peng-zhen, YANG Zi-jiang, SUN Li-xiang>, JI Wei. Analytic Method for Shear Lag Effect of Box Girders Under Concentrated Bending Moments[J]. Applied Mathematics and Mechanics, 2014, 35(7): 750-758. doi: 10.3879/j.issn.1000-0887.2014.07.004

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Analytic Method for Shear Lag Effect of Box Girders Under Concentrated Bending Moments

doi: 10.3879/j.issn.1000-0887.2014.07.004

¹Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, P.R.China;²School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, P.R.China

Funds: The National Natural Science Foundation of China（51208242; 51368031）; China Postdoctoral Science Foundation(2012M521815)

Received Date: 2013-09-14
Rev Recd Date: 2014-05-16
Publish Date: 2014-07-15

Abstract

Abstract

For simply supported box girders under concentrated bending moments, general analytic solutions to shear lag effect were presented based on the energy variational principle. Formulae for shear lag effect were given for several typical cases of one bending moment acting on the girder span interior, one end, or both ends. For an example box girder, shear lag effect was calculated respectively in the 3 cases of concentrated bending moment applied. The analytic results were compared with those of the finite shell element method. It’s shown that the presented analytic method has high accuracy in the calculation of box girder shear lag effect in comparison with the finite element method. Where there exists a concentrated bending moment applied on a simply supported box girder, there occurs sharp shear lag effect.
- box girder,
- shear lag,
- concentrated bending moment,
- analytic solution

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References(13)

References

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