Parametric Non Linear Analysis of anchorage strength for tension Lap Splice in slabs

This research investigated the performance of reinforced concrete one-way slabs with various configurations of spliced bars using finite element analysis (FEA). The study evaluated the impact of several parameters on the anchorage strength in thirteen reinforced concrete slab models. The variables considered were lap splice length (10d, 15d, and 20d), clear concrete cover (d, 1.5d, 2d), and end bar shape (hook end, straight). The specimens were modelled and analyzed under a four-point bending load using ABAQUS. The study incorporated a refined method for modelling the interaction between concrete and rebar to enhance the reliability and accuracy of the results. The analysis provided results including cracking loads, ultimate loads, bond stress, steel stress in spliced bars, cracking patterns, failure modes, and bond-slip response. Finally, The proposed FEA modeling successfully predicted the potential response of the analyzed specimens. The impact of varying lap configurations was investigated, revealing that bond strength between concrete and rebar was significantly enhanced by increasing the lap splice length and incorporating hooked ends.