하이브리드 섬유를 사용한 고인성 섬유보강 시멘트 복합체내의 철근이음에 관한 실험적 연구

An Experimental Study on the Splice of Reinforcement Embedded in High Performance Hybrid Fiber Reinforced Cementitious Composites

Experimental results on splice strength of concrete and hybrid fiber reinforced cementitious composite are reported. Two series of tests, with six specimens each, were carried out. The research parameters were: bar diameter(D16, D22), lap splice length(50, 75, 100$\%$). The current experimental results demonstrated clearly that the use of hybrid fibers in cementitious matrixes increases significantly the splice strength of reinforcing bars in tension. Also, the presence of fibers increased the number of cracks formed around the spliced bars, delayed the growth of the splitting cracks, and consequently, improved the ductility of bond failure.