Analysis Of Shear Lag Effect In Thin-walled Box Girder

Thin-walled box girder is often used in bridge engineering. However, there is shear lag effect in thin-walled box girder when thin-walled box girder is bent in the longitudinal direction. In this paper, a generalized hybrid finite strip method is deduded for analyzing the shear lag effect in box girders.It has the advantage of the generalized finite strip method and hybrid stress element.Shear lag effect in thin-walled box girder is analyzed with this method and stiffness matrix of generalized hybrid finite strip element is deduced.A calculating program for thin-walled box girder 's generalized hybrid finite strip method is compiled with FORTRAN language and performed in Visual Fortran environment of PC computer.A typical example demonstrates that the proposed method has higher accuracy and efficiency, is suitable for analysis of shear lag effect in box girders.