Finite Element Investigation of Retrofit of RC Deep Beams Using FRP Wraps

In this paper an analysis model is presented for reinforced concrete deep beams externally reinforced with fiber reinforced polymer (FRP) laminates using finite elements method adopted by ANSYS. The finite element models are developed using a smeared cracking approach for concrete and three dimensional layered elements for the FRP composites. The results obtained from the ANSYS finite element analysis are compared with the experimental data for two beams with different conditions from researches. The comparisons are made for load-deflection curves at mid-span; and failure load. The results from finite element analysis were calculated at the same location as the experimental test of the beams. The accuracy of the finite element models is assessed by comparison with the experimental results, which are to be in good agreement. The load-deflection curves from the finite element analysis agree well with the experimental results in the linear range, but the finite elements results are slightly stiffer than that from the experimental results. After verifying the finite element model with experimental results, new model was designed and the effects of different opening sizes and three types of retrofitting was studied. With these methods of retrofitting an increase of 13.7% in failure load was observed. Finally economical study between the three retrofitting methods was done and diagonal retrofitting has the best behavior

کلیدواژه ها:

FRP ، Reinforced Concrete Deep Beam ، Finite Element ، Retrofit