Interfacial stresses in FRP plated concrete beams including shear deformation effect

This paper presents an improved solution for interfacial stresses in a concrete beam bonded with a soffit plate including the effect of transverse shear deformation in both the beam and bonded plate. The analysis is based on the deformation compatibility approach developed by Smith and Teng (2001) in which the adhesive layer is assumed to be subject to stresses invariant across its thickness. In finding the interfacial stresses, a superposition technique is used and the total stresses are represented to be the sum of two parts, i.e., the one neglecting and the one including the shear deformation effect, with the latter part being expressed by Fourier series with linear supplementary terms. The unknown constants are determined from the boundary conditions and the governing equations by means of Galerkin procedure. Closed-form solutions are obtained for plated concrete beams simply supported at both ends and verified through direct comparisons with existing results. A parametric study is then conducted, evaluating the effect of transverse shear deformation on the interfacial stresses with varying material and geometry parameters of the plated beam structure.