BEHAVIOR OF POST-OPENED DEEP BEAM RETROFITTED BY USING FERROCEMENT LAYERS | ||
| International Journal of Advances in Structural and Geotechnical Engineering | ||
| Volume 06, Issue 01, February 2022, Pages 24-36 PDF (1.38 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/asge.2022.274835 | ||
| Abstract | ||
| This paper presents an experimental program conducted on four simply supported deep beams. One of these beams was kept solid without openings as a reference beam, whereas the rest of the beams had two openings one in each shear span which opened after casting using a drilling core machine. All the tested beams were manufactured using high-strength concrete and tested up to failure under the effect of two concentrated loads one on each shear span. The main objective of these experiments is to investigate the behavior of deep beams with openings strengthened using ferrocement outer layers. The use of the shear connectors to join the ferrocement outer layers with the original beam was the main studied parameter. Beam deflection, steel strain, crack propagation, and failure modes were recorded for all the tested beams. The results have shown that the presence of openings resulted in a significant reduction in both the initial stiffness and the shear strength. Also, the retrofitting of the deep beams with ferrocement outer layers and adding shear connectors can regain the beam capacity. Finally, the presence of the shear connectors changed the failure mode of the strengthened beam from de-bonding to shear failure | ||
| Keywords | ||
| Shear strengthening; deep beams; ferrocement layer; web openings | ||
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