About the influence of the infill panels over the collapse mechanisms actived under pushover analyses: Two case studies

Effects of “Reinforced” Infilled Frames on Existing Rc Buildings

“…In order to appraise the alteration of the structural behaviour in the presence of the reinforced infill panels, the increased mechanical parameters of the infill have been assumed according to the indications provided by the Italian Building Code [4], depending on the kind of intervention that is applied. In this case, the reinforcement technique is that of the reinforced plaster, and the code suggests the application of a correction factor of 1.3 to the original parameters of the masonry.…”

“…Another important effect is related to the regularity of the structural geometric configuration, both in plan and elevation, which might be significantly altered by the presence of very stiff and irregular infill walls, triggering unexpected storey mechanisms and/or torsion effects. The additional problem related to mechanisms that directly involve infill panels is that they may be brittle, to an extent more or less noticeable depending on the specific mechanical properties and stiffness and of the numerical model adopted [3,4].…”

“…An extensive comparison of the response of different structural configurations analyzed by non linear static procedure is presented. Besides the bare frame, two possible cases have been considered: RC frame with non-reinforced and with reinforced infill panels (respectively, this corresponds to a "strong" and to a "weak" infill behaviour [3,4].…”

Rintc Project: Nonlinear Analyses of Italian Code-Conforming Precast R/C Industrial Buildings for Risk of Collapse Assessment

“…Therefore, the influence of such provisions cannot be defined a priori for different sites and/or for different structural typologies. Some research studies have been performed for existing [3,4] and new RC frame structures [5] in order to investigate the reliability of modern design approaches. However, few studies have been performed for RC precast buildings in terms of seismic assessment [6] and risk study of existing precast buildings [7].…”

A Parametrical Analysis for the Rotational Ductility of Reinforced Concrete Beams

“…The code, consistently with the methodologies developed in literature, proposes two main approaches: a mechanical-empirical approach, based on plastic hinge length concept, and a purely empirical approach [4][5][6][7][8][9][10]. In addition, it should be noted that precisely defining the plastic rotation in the non-linear field is a crucial step in the seismic assessment of buildings and infrastructure [11][12][13][14].…”