عنوان مقاله [English]
Infilled frames significantly increase the stiffness, strength, and also change in ductility of structures compared to non-infill structures. Therefore, they cause changes in the seismic response of these structures. However, in our country, not enough attention is paid to the effect of infill on the seismic behavior of structures yet. So, structures are usually designed without considering the effects of infill on their seismic behavior. The reason could be the absence of the required procedural rules and also a lack of knowledge about the mentioned effect. In this study, for conducting a detailed assessment of the behavior of buildings with concrete frame and masonry infill, we studied the effect of infill thickness (by modeling of five types of samples with thicknesses of 200 to 310 mm), the number of spans and floors (by modeling of seven types of different samples) on the amount of initial stiffness, ultimate strength of the wall, mode of failure, and the maximum stresses in the wall. The results of these models are compared and shown in the tables and graphs. These comparisons show that the period is reduced to structures with infill. Therefore, structures with infill have a higher stiffness compared to non-infill structures. Moreover, by increasing the thickness, the strength and the bearing capacity of the structure will slightly increase.