Research Articles | Challenge Journal of Concrete Research Letters

Strengthening of Concrete Beams in Shear

Ahmed A. Elshafey
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Abstract


Finite element analysis (FEA) is used to predict the behavior of reinforced concrete beams strengthened in shear with fiber reinforced polymer (FRP). To verify and measure the accuracy of the FEM model, the FEA results were compared with both pervious experimental and theoretical results. Two beams were studied simulating the Horsetail Creek Bridge in Oregon, USA. The first one is a control beam with no strengthening fiber. The second one is wrapped with glass fiber reinforced polymer (GFRP) laminates to reinforce the beam in shear. Results were represented by load-strain curves for concrete, steel and fiber. In addition, the load deflection curves and crack patterns developed in the beams were presented. The results showed that FE modeling was accurate in simulating the tested beams. It was also clear that using FRP in strengthening reinforced concrete beams is an effective method in improving shear behavior of the beams.

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