Abstract
This paper exemplifies the results of shear transfer capacity and modes of failure of the precracked Reinforced Concrete (RC) push-off specimens bonded externally with bi-directional Carbon Fibre Reinforced Polymer (CFRP) Fabrics. External strengthening with Fibre Reinforced Polymer (FRP) fabrics is an evergreen technique for improving the structural performance and life span of the existing reinforced concrete structures. An experimental investigation was conducted to study the effectiveness of CFRP as an external reinforcement. The bi-directional CFRP fabrics were applied using two-component epoxy. The push-off specimens were cast and reinforced by varying the amount of internal shear reinforcement across the shear plane. The tests were performed with pre-existing crack along the shear plane of the push-off specimens prior to the application of direct shear load. The shear stress enhancement of the strengthened push-off specimens varies in the range of 7% to 56% over the unstrengthened push-off specimens.
Highlights
Abdul Aziz Abdul Samad Faculty of Civil and Environmental Engineering, Universiti Tun Hussein On n Malaysia, Malaysia
The shear stress enhancement of the strengthened push-off specimens varies in the range of 7% to 56% over the unstrengthened push-off specimens
The stiffness of the strengthened specimens was greater than the unstrengthened push-off specimens
Summary
Abdul Aziz Abdul Samad Faculty of Civil and Environmental Engineering, Universiti Tun Hussein On n Malaysia, Malaysia. 2009 carried out further investigation on the shear strength of reinforced concrete push-off specimens both with and without existing crack along the shear plane. The review showed that extensive research has been carried out to study the shear transfer capacity of reinforced concrete push-off specimens. This study is required to evaluate the shear transfer capacity of the CFRP strengthened reinforced concrete precracked push-off specimens across the cracked shear plane with reference to the unstrengthened push-off specimens. The overall goal of this study was to investigate the shear transfer capacity and modes of failure of reinforced concrete precracked push-off specimens bonded externally with bi-directional CFRP sheets. The tests were performed with pre-existing crack along the shear plane of the push-off specimens prior to the application of direct shear load.
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