Corbels strengthened with CFRP under deferent loading

Abstract

Short cantilevers under loads are known as corbels, and they generally have a detrimental impact on the strength of concrete structural components by reducing their resistance to external loads. Strengthening with CFRP strips as an externally bounded approach is employed to raise that. The behavior and durability of strengthened corbels under (constant and incremental) loads are examined in this research. Twelve double corbels were cast and tested as part of the experimental program, with the dimensions of the corbels on all specimens remaining constant. While the other nine are left un-fortified as control corbels, nine of them are strengthened using CFRP strips in various patterns. The results indicate that the maximum load capacity of corbels is affected by both constant and incremental loads. In addition, the ultimate load and ultimate deflection of the legs subjected to five load cycles were less than those subjected to constant stress. The bull legs rein-forced with externally bonded CFRP strips demonstrated a significant increase in ultimate load under any ap-plied load but a reduction in ultimate deflection relative to the unreinforced bull legs under the same applied load. All failures of the bull limb were ascribed to the unbounded CFRP strips.