Reinforcement bars, or rebar, face length limitations, prompting the need for connection methods in construction. Techniques like overlapping splicing, welding, and mechanical clamping address this. This research investigates flexural performance in reinforced concrete beams, focusing on tensile reinforcement splice methods—overlapping and mechanical clamping with a clamp connection. Key aspects such as flexural moment, deflection, and crack patterns are evaluated through laboratory testing using a two-point loading method. Findings show that beams with overlapping splices outperform those with mechanical clamping, with nominal moments of 33.5 kNm and 32.31 kNm, and deflections of 69.37 mm and 49.02 mm, respectively. Crack patterns in both samples indicate failure at one-third of the beam span due to reinforcement splices at the midpoint, enhancing cross-sectional area. In conclusion, this research underscores the superior performance of overlapping splices in terms of nominal moment and deflection, offering valuable insights for optimizing reinforced concrete element performance in structural engineering.

Steel rebar is generally 12 meters in length, so if more than that is required, it must be joined using methods such as lap splice, welded splice, or mechanical splice. This study compares the flexural strength of reinforced concrete beams without splice, with lap splice, and with Cold Forged sleeve with Parallel Threads (CFSPT) type mechanical splice, to assess the performance of each splice method. The study used beam specimens measuring 200 x 20 x 40 cm with a planned concrete quality f'c 25 MPa. Flexural strength testing resulted in a nominal moment value of 85.209 kNm for the normal beam, 92.952 kNm for the skip beam, and 82.305 kNm for the coupler beam. Based on the nominal moment value of the experiment, the lap splice beam has the highest value and the coupler connection beam has the lowest value. The resulting deflection of the normal beam tends to be higher than that of the lap splice beam and the coupler beam, which is 72.522 mm. While the maximum deflection produced by the lap splice beam and coupler beams is 44.876 mm and 40.191 mm, respectively. The ductility values of the normal beam, lapsplice beam, and coupler beam were 5.949; 3.257; 4.550, respectively.