Studyfor shear lagwarpingdisplacement mode in box girder with single box triple cellsChinese Full Text
WU Zhou-bao;CHEN Yu-ji;Department of Civil Engineering,Foshan University;Faculty of Civil and Transportation Engineering,Guangdong University of Technology;
Abstract: Aiming at the space deformation characteristics of box girder with constant section single box triple cells,and considering the attached total cross section of the longitudinal displacement on longitudinal balance beam,4types of box girder shear lag warping displacement mode are assumpted.The total potential energy function of system is deduced based on the principle of minimum potential energy,obtaining a set of differential equations with boundary conditions by the variational method,based on it,deduced the distributed situation of the shear lag coefficient in different warping displacement functiont.By means of some examples and by using the finite element method,verificated the shear lag coefficient of various warping displacement function.At last,the solution of this paper was compared with the shear lag coefficient of the finite element analysis.Analyzed different kinds of the shear lag coefficient of warping displacement mode that got close to the finite element method.And compared with the shear lag coefficient of considering the attached total cross section of the longitudinal displacement on longitudinal balance beam.
Keywords：
box girder single box triple cells; shear lag effect; variational method; longitudinal balance;
- DOI：
10.13797/j.cnki.jfosu.1008-0171.2014.0037
- Series：
- Subject：
- Classification Code：
U448.213
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