Abstract
Bending strain distribution on wide flanges does not become uniform because of the shear lag. For solving the the shear lag problem, an analytical approach with assumptions of the shear lag displacement on certain particular cross section was proposed, and was subsequently generalized by the harmonic analysis. Authors have proposed semi-analytical approach to solve the shear lag problem with the help of the homogenized beam theory. This approach uses FEM for a representative volume element (RVE) which consists of the solid elements to obtain the pattern of the shear lag displacement. In this paper, we propose to utilize two dimensional distribution of the shear lag displacement in flange cross section obtained by the numerical result of the RVE in order to improve accuracy of the semi-analytical approach. The numerical examples demonstrate that the error of in-plane shear strain on the flange due to the shear lag can be reduced by the proposed method.
