EFFICIENT STEEL-REINFORCED UHP-SHCC STRENGTHENING FOR LAP-SPLICED RC BEAMS | ||
| International Journal of Advances in Structural and Geotechnical Engineering | ||
| Volume 03, Issue 02 - Serial Number 1022019, May 2019, Pages 61-76 PDF (1.32 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/asge.2019.270758 | ||
| Abstract | ||
| This paper investigates the effectiveness of strengthening reinforced concrete (RC) beams with tension lap splices using a jacketing of Ultra High Performance Strain Hardening Cementitious Composites (UHP-SHCC) with embedded vertical stirrups. Nine RC specimens with different lap splice lengths at the mid span region were tested in flexure to examine the performance of the proposed technique for eliminating the bond failure mode in such lap splices. The test parameters were the lap splice length and the effect of confinement (no confinement and a jacketing of UHP-SHCC with embedded stirrups at different spacing). The test results show that, whilst the spliced control specimens failed in a brittle manner due to splitting of main steel, using UHP-SHCC jacketing with embedded vertical stirrups has increased the ultimate load and changed the mode of failure to flexural and ductile one. Moreover, a pronounced effect on increasing the bond strength between the reinforcing steel bars and surrounding concrete was observed for all confined specimens. Consequently, a satisfactory ductility was obtained which confirms the applicability of the UHP-SHCC jacketing for strengthening lap-spliced region of RC beams. | ||
| Keywords | ||
| Lap splice; Strengthening; UHP-SHCC; Bond strength; Ductility | ||
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