This paper presents the results of an experimental program investigating the behavior of a steel frame with masonry infill panels subjected to cyclic loadings. Three types of masonry frequently used were tested. Loads were high enough to crack the infill panels without yielding the steel frame. The effects of the infill panels on the stiffness and the energy dissipation of the structure were evaluated. From the experimental results obtained on the three types of masonry, models are proposed to evaluate the behavior of a structure with infill panels. These models could be used in nonlinear dynamic analysis. Key words: masonry infills, masonry, seismic behavior, cyclic loading, modelling, frames.
