This paper introduces an extensive survey of published work on general concepts of infilled frames under cyclic loading. A numerical procedure for the nonlinear analysis of infilled frames based on the finite element method is presented. The materials and geometrical nonlinearities of the reinforced concrete frame taking into account the presence of the steel reinforcement is considered together with cracking and nonlinear stress-strain relation of both concrete and steel. The infill panel material nonlinearities due to cracking and crushing are also considered using ANSYS® Program. Numerical parametric studies have been conducted to investigate different factors affecting the behavior of reinforced concrete infilled frames under cyclic loading. A rational approach for equivalent diagonal strut was developed and can help in design of reinforced concrete infilled frames.