In this study, the 1-directional tension tests were conducted to evaluate ductility capacity of splice rebar. As a result, the ductility of the reinforced concrete members embedded in the coupler was significantly lower than that of general RC members.

In this study, the 3 point bending tests were conducted to evaluate ductility capacity of splice rebar. As a result, the difference in ductility between RC members embedded in the coupler and general RC members was not significant. For more accurate analysis, 4 point bending tests are considered to be necessary.

In this study, longitudinal strain distribution of spliced rebar in the 1-directional tension test are evaluated with an image processing method (IPM). From these results, it is estimated that the coupler can decrease the elongation at the ultimate load, therefore, the spliced rebar with coupler should be evaluated to be used in the RC structure with LSD.