Substitution of cutting bottom reinforcement of the rectangular reinforced concrete beams with different techniques

الملخص EN

This study deals with the restoring of the flexural strength of reinforced concrete beams with opening at tension side.

It presents experimental and theoretical studies using different external techniques to restore the flexural strength after cutting the reinforcing steel at the original section.

Seven reinforced concrete beams were tested, and retrofitted to study the effect of bonding or bolting steel plates, using side bars over opening, and using side CFRP strips on the behavior of beams.

The ultimate strength, stiffness, ductility and mode of failure of theses beams were recorded.

It was reported from the output data that, retrofitting using bolted steel plates is structurally efficient and restores the flexural strength, value superior to those of the original section without opening at tension steel.

Further retrofitting using other techniques restores the above parameters with different percentages of the original one.

The reported output data showed high confidence and reliability in applying these techniques considering some restrictions.