Modeling and Studying the Behavior of Reinforced Concrete Infilled Frames with Reinforced Polymer Composites

There are many concrete infilled frames in Iran, that they need to strengthen . One of the effective methods to strengthen for these buildings, that in recent years many studies have been done about it, is the use of fiber-reinforced composites (FRP). In this paper, we provide a simple method to estimate the stiffness and ultimate load capacity of concrete infilled frame. Infill materials modeled via equivalent diagonal element, are modeled and compared with each other. The two methods can be easily applied to the two-dimensional nonlinear analysis of structures. The result of pushover analysis, offer us a model that is the very close and similar to the prototype. In addition, we provide the results of a case study on a five-story concrete infilled frame with FRP composites have been strengthened, that can be used as a way to replace Infill FRP composites in frames. The laboratory and analytical results that obtained, indicate that the reinforced concrete infilled frame with reinforced FRP composites, increases stiffness and final load capacity of the structure.