Modeling of FRP Strengthening of RC Girder Curved Soffits

Abstract

In recent decades, fiber-reinforced polymer (FRP) is being used more and more to make concrete structures stronger. In this study, nonlinear finite element (FE) analysis was used to model and compare the influence of curvature performance on the behavior of the simply-supported RC curved soffit reinforced girders strengthened with fiber-reinforced polymer plates (CFRP) with a curve height of 5 to 130 mm. In this study, two models with different heights of curve (5 and 130 mm) and references for each model were used. Each model had dimensions that were similar to those of the models used in the program in terms of cross-sectional area and effective span. Simulations were done on the girders to find out how the load moved in relation to the mean range, the failure load, and the failure mode. This was done so that the effect of curvature on the performance of this type of structural element could be understood. The results show that the girder of height of curve is 5 mm more than 130 mm of the analytical ultimate load compared with that experimentally with a difference of only 4.5%, and 4.2% respectively. The load-displacement curves of the experimental tests were accurately simulated with the help of a nonlinear finite element model.