Shear behaviour of RC T-beams with U-bonded glass fibre reinforced plastic sheet

摘要

This paper presents an experimental study on reinforced concrete (RC) T-beams strengthened in shear using epoxy bonded glass fibre fabric. Nine simply supported RC T-beams, with six beams used as control beams with and without shear reinforcements formed the set of specimens. Three beams were strengthened in shear with up to three layers of glass fibre reinforced polymer (GFRP) in U-shape around the web of the T-beams. The specimen beams had six mm diameter stirrups provided at 200 mm spacing. They were tested at the structural engineering laboratory of IIT, Kharagpur using a 300 ton Universal Testing Machine (UTM). The experimental results showed the externally bonded GFRP with internal transverse steel reinforcement contributed significantly to the shear capacity.