Investigating the effects of masonry infill panels on high-rise structures

In modern Pushover analyzes, as well as irregular structural forms, consideration of the effect of higher modes is critical. For this purpose and in the same direction as the companion paper, this study extends prior work by attempting to examine three available 15-, 20- and 25-story high-rise geometrically irregular concrete buildings. This study, also takes into account the effects of masonry infill panels. The examined variables include the layout of the infill panels and investigating the results of the adaptive pushover analyzes associated with each case. The results of the more precise nonlinear dynamic analysis are the reference required to review and compare pushover analysis responses, which they show a significant difference between the results and the placement layout of the masonry panels. The most important conclusion of this study is that in irregular RC structures infilled with masonry panels or walls, it is necessary to consider not only the location of the center of mass, but also the location of the center of stiffness (rigidity) of the structure, or in another words, the influence of infill panel layouts on MRF response (i.e. eccentricity between the center of mass and stiffness). Furthermore, it is necessary to consider the main mode of oscillation. Finally, as the main characteristic of this study, the outcomes of the Simple Lateral Mechanism Analysis (SLaMA) procedure show that layouts of the infill panels can play a major role in this method.