**4. Conclusion**

A Series of high strength reinforced concrete beams under shear was investigated. The effects of the concrete and the transverse reinforcement on the shear behaviour of the beams were verified. The experimental and the theoretical results led to the following conclusion:


*Experimental and Theoretical Investigation on the Shear Behaviour of High Strength Reinforced… DOI: http://dx.doi.org/10.5772/intechopen.86499*

• The contribution of the HSC to the shear resistance of reinforced concrete beams was underestimated by the five universal design codes, and in the same time, the contribution of the stirrups was overestimated. These design codes need more refinement to reflect and to ascertain the improved shear strength of high strength reinforced concrete beams.
