The reinforced concrete (RC) moment-resisting frames with masonry infill walls is widely used in buildings. In this study, two-bay and three-storey RC Bare Frame (BF), RC Infill frame (IF) with Cement mortar (CM) interface combinations scaled to a factor (1: 6) are analyzed. The objective is achieved by analytical studies. To investigate this, we modelled the behavior of frame structures with masonry IF in two ways such as a linear method and Pushover (PO) method. It is found that with the addition of masonry infill wall rigidly connected to the frame, the lateral strength, the stiffness of the BF RC frame increase significantly while the displacement ductility ratio decreases significantly. Numerical simulation of the BF and the IF frames is done with SAP2000 (Structural Analysis Package) a Finite Element Method (FEM) based software.