The Theory Of Shear Lag Effect In Thin-Walled Box Girder

Thin-walled box-shaped beam shear lag effect in the engineering design of its early scholars will study, after 20 years of development, the study of shear lag has also made some achievements, to solve some practical engineering problems, but many of the problems and have not completely been resolved, as China's transport development, the shear lag new issues are emerging, the need for further research, the paper shear lag on the following issues of some of the work: The use of minimum potential energy variational principle derived by calculating the theoretical shear lag effect formula, and different displacement function curves selected for analysis, variational method using different forms of support load and simply supported, the cantilever beam shear lag effect;continuous beam shear lag for the analysis, and often variable cross-section and cross section of the box beam shear lag sensitivity analysis to explore;using ANSYAS software simulation of the box beam shear lag effect, and variational method and the finite element method shear lag effect the results were analyzed;to cantilever ANSYAS software to be used as an example a preliminary analysis of the negative shear lag effect and mechanism.