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Structural Engineering and Mechanics Volume 47, Number 1, July10 2013 , pages 75-98 DOI: https://doi.org/10.12989/sem.2013.47.1.075 |
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Shear strengthening effect by bonded GFRP strips and transverse steel on RC T-beams |
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K.C. Panda, S.K. Bhattacharyya and S.V. Barai
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| Abstract | ||
| This study focuses on shear strengthening performance of simply supported reinforced concrete (RC) T-beams bonded by glass fibre reinforced polymer (GFRP) strips in different configuration, orientations and transverse steel reinforcement in different spacing. Eighteen RC T-beams of 2.5 m span are tested. Nine beams are used as control beam. The stirrups are provided in three different spacing such as without stirrups and with stirrups at a spacing of 200 mm and 300 mm. Another nine beams are used as strengthened beams. GFRP strips are bonded in shear zone in U-shape and side shape with two types of orientation of the strip at 45\' and 90\' to the longitudinal axis of the beam for each type of stirrup spacing. The experimental result indicates that the beam strengthened with GFRP strips at 45\' orientation to the longitudinal axis of the beam are much more effective than 90\' orientation. Also as transverse steel increases, the effectiveness of the GFRP strips decreases. | ||
| Key Words | ||
| glass fibre reinforced polymer (GFRP); reinforced concrete (RC); strengthening; shear strength; T-beams | ||
| Address | ||
| K.C. Panda : Department of Civil Engineering, ITER, SOA University, Bhubaneswar, 751030, Odisha, India S.K. Bhattacharyya : CSIR-Central Building Research Institute, Roorkee, 247667, Uttarakhand, India S.V. Barai : Department of Civil Engineering, IIT Kharagpur, 721302, West Bengal, India | ||