Ultimate capacity prediction of carbon fiber reinforced polymers (CFRP) strengthened reinforced concrete flexural elements based on debonding failure

The ultimate strength of reinforced concrete elements retrofitted in flexure by means of externally bonded carbon fiber reinforced polymers (CFRP) has attracted the attention of researchers due to many advantages highlighted by a wide set of experimental results. The current paper presents analytical and experimental study on reinforced concrete (RC) flexural elements strengthened for flexure with externally bonded CFRP. A simple yet rational model is developed, based on cross sectional analysis, satisfying strain compatibility and equilibrium conditions, whichis capable of predicting the ultimate moment capacity of (Fiber Reinforce Polymers) FRP strengthened flexural sections. A total number of nine specimens, includingthree beams, and six numbers ofone way spanning slabs were cast. One beam and three slabs were kept as control specimens having no strengthening with CFRPand the other specimens were strengthened with CFRP laminates and tested under the “four point loading arrangement”.Debonding strain at the ultimate failure is calculated based on the experimental results and compared with the existing design standards. The test results indicated that significant enhancement of load carrying capacity can be achieved by externallyreinforced with CFRP

Strengthening of reinforced concrete beams using carbon fiber reinforced polymers (CFRP) : an experimental study

It is desirable to repair and reuse reinforced concrete structures from the point of view of sustainability. The strengthening may be needed to prolong the life of deteriorated members and this study the attention is placed on restoring or improving the load carrying capacity of reinforced concrete beams. This paper presents the results of experimental programme intended to evaluate the contribution of Carbon Fiber Reinforced Polymers (CFRP) laminates towards the shear strength and structural strength of reinforced concrete beams. The test results indicated that significant enhancement ;j I,I,ld carrying capacity of the beams under flexure and shear could be achieved with CFRP installed in a crtain manner

Experimental study on use of FRP for enhancement of shear capacity of reinforced concrete beams

Most of the structures are made of reinforced concrete because its load carrying capacity and durability. But the strength of reinforced concrete can be reduced due to several reasons such as corrosion of the steel, accidental damages, etc. Hence to enhance the earning capacity, various techniques have been used. The use of Fiber Reinforced Polymer (FRP) is one of the latest techniques. In this research, the behavior of the TRP wrapped reinforced beams were studied and tested. Four samples were tested under two different loading arrangements. The increment of shear carrying capacity of the FRP reinforced beams was experimentally observed and results were compared. Externally wrapped IRP can enhance the shear carrying capacity of the reinforced concrete beams