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Volume Title: ICASGE2021

DOI: ICASGE-RCS

Tarek Fawzy; Abdel-Hakim Khalil; Ahmed Atta; Hamdy M. Afefy; Mohamed Ellithy; ¹Tarek Fawzy; Ahmed Atta; ²Mohamed Ellithy

¹professor of concrete structures

²Faculty of engineering, Tanta University

An experimental and analytical study on seven specimens of lap splices embedded in high-performance concrete (HPC) prisms without confining reinforcement was performed under direct tension. The experimental program was classified into two groups; first group involved the straight-ended splices, while the second studied a new developed technique based on anchor-ended splices. For straight-ended bars, conventional lap splice was studied as a benchmark. The anchor-ended splices contained embedded steel plates connected to the ends of the spliced bars, by which the slippage of bars was suppressed. It was found that the used technique not only achieved higher capacity at failure, but also a bond induced failure was altered with a rupture of bars at its maximum tensile strength. Finally, an analytical model was proposed in order to predict the ultimate tensile stress of the straight-ended spliced bars. The accuracy of the proposed model was verified against the test results of 137 existing specimens from previous research. The comparison showed good agreement between the results of the proposed model and the test results.

Lap splice; direct tension; anchor-ended; plate-ended