Recently, reinforced concrete infilled frames (IF) are widely employed in construction worldwide. Despite its significant interaction with the bounding RC frame, the infill is typically regarded as a nonstructural element and is not taken into consideration during design or analysis. A layer made of Engineered Cementitious Composite (ECC) has recently been used to modify the behavior of many structural components. Eleven frame models were examined in this study: the bare frame (BF- 0), the infilled frame (IF-0), the infilled frame with a single layer of ECC (IF-1), and the infilled frame with double layers of ECC (IF-2). The first four frames were chosen as single-degree of freedom (SDOF) models. The other seven frames, however, were MDOF (multi-degree of freedom) models. Through nonlinear pushover analysis with the SeismoStruct programme, a verification investigation on earlier experimental work was carried out. The collected results demonstrated that adding an ECC layer or layers to the infilled frame models boosted their in-plane capacity. When compared to the bare frame model, adding an infill panel to the model raised the peak load by more than 70%. The capacity of the infilled-framed was improved in SDOF models by around 17% and 20%, respectively, when a single or double ECC layer or layers were used. Using the ECC layer to strengthen the first narrative of MDOF models offers a higher enhancement ratio of about 73%.