Open AccessAnalysis of Shear Lag Effect in Twin-cell Box Girders
Author(s) -
Min Luo,
Pengzhen Lin,
Liping Sun
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/563/3/032043
Subject(s) - box girder , image warping , cantilever , lag , shear (geology) , girder , structural engineering , finite element method , mechanics , engineering , materials science , computer science , physics , composite material , computer network , artificial intelligence
For the twin-cell box girder, considering the difference of the shear lag between each cantilever plate, the shear lag warping displacement function of each wing of the box girder is defined. Based on the basis of the variation principle, the governing differential equations for considering the shear lag effect of twin-cell box girder are established. For a typical simply supported beam of twin-cell box girder, according to the three dimensional numerical methods used for plate and shell and the analytical solution method in this paper, the shear lag distribution law of uniform load and concentrated force has been studied. The results show that the shear lag warping displacement model proposed in this paper can reflect the difference of shear lag between each cantilever plate. The analytical solution is in good agreement with the finite element numerical solution. The shear lag effect at the top and bottom of the web site of the twin-cell box girder is different from that of the edge web site. In this paper, the stress at the top and bottom of the middle web is smaller than that at the side web.