Experimental analysis of reinforced concrete beams strengthened with steel bars and epoxy structural adhesive

Abstract

This work was aimed at analyzing the efficiency of the strengthening of reinforced concrete beams with the addition of steel bars and epoxy adhesive. Five beams were produced, out of which four beams were strengthened to flexure. In two of them, “U” clips were also used to improve the anchorage of the strengthening. The tests demonstrated that the clips reduced the resistances of the beams compared to those without clips. The strengthened beams without clips yielded better results, but the largest limiting factor was the adherence between the epoxy and beam. The use of clips for solving the problem of adherence made this research original. The conclusions were based on the comparisons of the tested beams.

Behavior of Reinforced Concrete Beams with Vertically Penetrated Holes across the Cross ‐ Sectional Depth

“…In [4], the authors reported a similar study with the use of CFRP sheets. Authors in [9] found that beams with openings located at the mid-span failed due to shear, which was unexpected. On the other hand, beams with openings located at the support failed due to flexural failure without any significant impact on the ultimate load [9].…”

“…Authors in [9] found that beams with openings located at the mid-span failed due to shear, which was unexpected. On the other hand, beams with openings located at the support failed due to flexural failure without any significant impact on the ultimate load [9]. It was reported that beams with openings reinforced with a steel sleeve exhibit higher bearing capacity and lower deformation capabilities compared to circular beams without reinforcement [10].…”