Concrete Beams Reinforced with High Strength Rebar in Combination with External Steel Tape

The use of combined reinforcement in the form of external S275 steel tape and A1000 high-strength rebar is generally interesting for research. The use of a package of reinforcement enables a better choice of a rational cross-section area of reinforcement by varying the rebar diameter or the width of the steel tape. In addition, an interesting issue for research is the limit strain values of reinforcement of different strength classes since they can differ significantly, which affects the operation of the structure as a whole. For structures with combined reinforcement, there is still the number of issues not studied yet: for example, the stages of inclusion in the work of reinforcement and the magnitude of forces perceived by particular type of the reinforcement, the process and reasons for the destruction of experimental samples, the feasibility of such reinforcement, and the effect of high-strength rebar on the strength and deformability of reinforced concrete structures. Given that the issue of combined reinforcement is not sufficiently studied, the main task of the study was to investigate the stress–strain state of reinforced concrete beams with combined reinforcement (high-strength A1000 steel bars in combination with external S275 steel tape) in more detail.