Shear strengthening of RC beams using near surface mounted technique with glass fiber reinforced polymer

This paper presents the experimental investigation results on the shear behavior of strengthened reinforced concrete beams by using Glass Fiber Reinforced Polymers (GFRP) strips. Several techniques have been developed for shear strengthening of Reinforced Concrete (RC) members by using Fiber Reinfor...

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Bibliographic Details
Main Authors: Rashmi, M., Anand, V. Nikitha, Balaji, N. C.
Format: Conference Proceeding
Language:English
Subjects:
Concrete
Fiber reinforced concretes
Fiber reinforced polymers
Glass fiber reinforced plastics
Grooves
Orientation effects
Reinforced concrete
Reinforcing steels
Shear strength
Stirrups
Strengthening
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Summary:This paper presents the experimental investigation results on the shear behavior of strengthened reinforced concrete beams by using Glass Fiber Reinforced Polymers (GFRP) strips. Several techniques have been developed for shear strengthening of Reinforced Concrete (RC) members by using Fiber Reinforced Polymer (FRP) but Near Surface M ounted (NSM ) technique is one of the most effective technique. NSM-FRP reinforcement has been found to perform efficiently as a shear strengthening technology for RC members. NSM technique contains a groove on the outside surface of the concrete member, the epoxy paste was filled into groove, then GFRP strip is mounted in the groove. The main objective of experimental work is to study the effect of NSM technique on shear resistance for RC beam, effect of NSM orientation on strengthened beams, and the effect of spacing of GFRP strips. Analyze the behavior of shear strengthened beams, was compared with beams reinforced with conventional steel stirrups and contribution of GFRP strengthened specimen for shear resistance. This work involved casting of RC beams and were tested up to failure. The experimental program included un-strengthened beams which is referred as Control Beam and strengthened beams using NSM technique with different NSM orientation (90° and 45°) and different spacing of GFRP strips. The test results included ultimate capacity load, deflection, linear displacement, cracking, and mode of failure. Beams strengthened with GFRP strips showed an increase in the load carring capacity ranging between 48% to 93.5% comparing to the control beam.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0039664