Lap Splice Performance of Reinforcing Bars in High Performance Fiber Reinforced Cementitious Composite under Repeated Loading

반복하중 하에서 고인성 시멘트 복합체 내 철근의 겹침이음성능

Experimental results on lap splice performance of high performance fiber reinforced cementitious composite(HPFRCC) with fiber types under repeated loading are reported. Fiber types were polypropylene(PP), polyethylene(PE) and hybrid fiber[polyethylene fiber+steel cord(PE+SC)]. The development length($l_d$) was calculated according to the relevant ACI code requirements for reinforcing bars in concrete. The current experimental results demonstrated clearly that the use of 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.