Abstract
Concrete overlaying is one of the repairing methods of the slabs in the steel girder bridges. However, overlaid concrete may separate from the old slab because of the shear stresses caused by the heavy load such as trucks or trailers. Therefore, experimental research has been conducted to clear the mechanical behavior of the slabs with concrete overlay. Analytical way using non-linear finite element method is also developed and compared with the experimental data.Furthermore, this analysis is applied to the models of real bridge slabs to estimate the shear stresses at the boundary of overlay and slab, and it is shown that overlaid concrete will not be separated from the slab by the traffic loads.
