Experimental behavior of reinforced concrete corbels strengthened with carbon fibre reinforced polymer strips

الملخص EN

This research is devoted to investigate the effect of Carbon Fiber Reinforced Polymer (CFRP) strips on the behavior and load carrying capacity of strengthened and repaired reinforced concrete corbels.

Experimental investigation was carried.

The experimental program variables include location, direction, amount of CFRP strips and effect of shear span to effective depth (a / d) ratio on the behavior of strengthened corbels.

All corbels had the same dimensions and flexural reinforcement and they were without horizontal shear steel reinforcement.

The experimental results obtained from the adopted strengthening and repairing CFRP techniques showed a significant improvement in the behavior and carrying capacity of the tested corbels.

An increase of about (44.5 - 60) % in the ultimate load has been obtained for specimens strengthening by inclined technique compared to the ultimate load of control corbel and (14.7 - 31.2) % for specimens strengthening horizontal technique.

For corbels repaired with CFRP strips, an increase of (56 %) with respect to the ultimate load of control corbel is achieved.

Also the strengthened corbels show stiffer load deflection response than corresponding control corbels (unstrengthen corbels).