Numerical analysis of reinforced concrete beams pre-cracked reinforced by composite materials

Abstract

The mechanical properties of concrete and steels are likely to deteriorate depending on the environmental conditions defined by the geographic location of infrastructures in civil engineering. In this field, external bonding of FRP plates or sheets is one of the most popular methods for strengthening reinforced concrete structures. This paper focuses on the application of three-dimensional finite element method (3D-FEM) in order to study the effect of some parameter on the failure by delamination of repaired cracked concrete beams in the first part. In the second part, we focused to study the effects of adding of steel fiber in concrete and its volume fraction on the load-deflection response of concrete. The level of ultimate load is examined of patched and unpatched concrete beams. The results also showed that the flexural-deflection response vary with volume fractions of fibers compared to witness beam (without reinforcement). The effects of the loading magnitude, crack initiation, mechanical properties and geometrical parameters were highlighted.