Bond Strength And Stress Of Lap Splice Reinforcement With Fiber Reinforced Polymer Wrapped And Unwrapped Concrete Beams

1649 Words Nov 28th, 2016 7 Pages
Bond Strength and Stress slip of Lap splice reinforcement with Fiber Reinforced Polymer wrapped and unwrapped concrete beams with the confinement properties. Abstract: This paper describes the experimental results of different researchers to examine the properties and behavior of lap splice reinforcement in a concrete beam. Beam specimens were constructed and tested in the lab. The beam specimen was tested with monotonic (cyclic) and fatigue loading. The beam was divided into three groups: unwrapped, wrapped with glass fiber -reinforced polymer (GFRP) and wrapped with carbon fiber-reinforced polymer (CFRP). During the test the different variables were used regarding the presence or absence of FRP wrapping, the types of loading (cyclic or fatigue) and types of FRP used. The result shows that the splice joint confined with FRP materials in beam showed a large increase in load and deflection. These results also represent the CFRP has greater bond strength and ductility than the beam wrapped with another polymer and also the splice joint that is not wrapped. The comparison of bond stress-slip response under monotonic and fatigue is also discussed. The critical point is a portion at the splice of reinforcement and strength capacity of the structural member should be increased and taken into special attention.

Introduction
Bond strength of the concrete and steel is a major to transfer the load to any structure. The decrease in bond strength between the concrete and steel…

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