A hypothesis based on numerical simulations and design code-based analytical models

Several design codes prescribe punching shear verification in flat slabs, especially for common scenarios such as concentric punching and punching under bending moments. Although openings are generally addressed in design codes, asymmetric openings are often neglected. This paper presents a parametric numerical analysis to assess the punching shear capacity predictions of four design codes for slabs with asymmetric openings. Various opening configurations are considered, with the control perimeter held constant in some cases. Based on the results, a behavioral hypothesis is proposed, considering the following observations: (i) asymmetry can be approximated as an eccentricity, though this has limited applicability; (ii) the contribution of interrupted reinforcement significantly affects the slab's performance, as does the opening width. The proposed hypothesis is intended to provide a preliminary framework for guiding future studies addressing the behavior of slabs with asymmetric openings.