Design of Reinforced Concrete Infilled Frames

Seismic Design of Masonry and Reinforced Concrete Infilled Frames: A Comprehensive Overview

“…In case if RC infills, however, the pinching effect observed is practically entirely attributed to relative slip at horizontal interfaces between infill and frame (Moretti et al, 2014;Oesterle et al, 1976). In Fig. 14 is illustrated the diagram of horizontal load versus slip at the interface between a reinforced concrete frame and a RC infill of a 1/3-scaled model tested in the Laboratory of Concrete Technology and Reinforced Concrete Structures of the University of Thessaly (Perdikaris et al, 2012).…”

“…It should be noted that the adoption of different values of strut width and of strut layouts, leads to considerably different results (Crisafulli et al, 2000;Moretti et al, 2014;Papia et al, 2003), regarding the stiffness and the overall response of the infilled frame.…”

“…However, in the case of a strong RC infill/frame connection, the overall stiffness of the infilled frame is underestimated when the equivalent strut width is calculated according to the above code provisions (Moretti et al, 2014).…”

“…Moretti et al (2014), based on 1/3-scale tests of RC infilled frames, have shown that several of these failures are unlikely to occur in RC infilled frame.…”

“…The characteristics of the frame/infill interface and the type of connection between the two components have a major impact upon the load transfer mechanisms, the mode of failure, the collapse load and the deformation at which failure of the infilled frame occurs (Kahn and Hanson, 1979;Koutromanos et al, 2013;Moretti et al, 2014). In RC infills the influence of the frame/infill connection is more decisive than in masonry infills, because (a) there are more options for connecting a RC infill with the frame and (b) the inherent higher stiffness of a RC infill affects more the infilled frame, compared to a masonry infill with similar geometry.…”