ABSTRACT
Infilled frames were the focus of numerous experimental tests which have been executed to investigate the seismic behaviour of these systems, but the task remains challenging due to significantly pronounced nonlinear structural behaviour. The infill inevitably changes the “common” and well-known structural behaviour of bare steel and RC frames into a more complex interactive behaviour, strongly influenced by randomness introduced by heterogeneity of infill. While positive effects such as improved strength can be treated as redundant and consequently neglected in design to vertical forces, negative effects cannot be ignored in seismic areas. In the last decade, a few comprehensive research studies on RC and steel masonry infilled frames were carried out at the Faculty of Civil Engineering and Architecture Osijek. In this paper, the main conclusions from these studies are provided together with a review of contemporary structural solutions for steel and RC masonry infilled frames.
