Abstract
Institute of Tech., Samsung Engineering & Construction Co., Ltd., Seongnam 463-771, KoreaABSTRACT In this study, high strength concrete corbels reinforced with steel fibers and polypropylene fibers, and subjected tothe vertical and horizontal loads were constructed and tested. The results showed that performance in terms of load carrying capac-ities, stiffness, ductility, crack width, and number of cracks was improved, as the steel fibers and polypropylene fibers were added.The polypropylene fiber reinforced concrete corbels resulted in higher ductility in presence of horizontal loads, but showed largercrack width than the steel fiber reinforced concrete corbels. And, the heads of the headed bars provided excellent end anchorageof the main tension tie reinforcement. Experimental results presented in this paper are also compared with various prediction mod-els proposed by codes and researchers. The refined strut-and-tie model showed more accurate and conservative predictions in pres-ence of horizontal loads, and the truss model proposed by Fattuhi provides fairly good predictions for fiber reinforced concrete corbels.Keywords : corbels, steel fibers, polypropylene fibers, high strength concrete, headed bars
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