Parametric structural computational study of flat slabs under punching shear stress

Resumo

The system composed of flat slabs and columns offers advantages compared to the traditional system
of slab-beam system such as increased internal space and reduced formwork usage. This structural system has
been the object of study over the last few decades due to the complexity of its structural behavior, particularly the
punching shear phenomenon. It is a brittle failure mechanism that occurs in the slab-column connection, induced
by high shear forces. Thereby, the study of punching shear is crucial due to structural sudden failure characteristic.
Over the last decades, the relevance of parameters that influence the performance of flat slabs has been
investigated, such as slab thickness, longitudinal reinforcement ratio and column size. The use of parametric
computational analyses allows the use of optimization procedures to improve the efficiency of the system and

further investigate the relevant parameters affecting punching shear. Therefore, this research employs three-
dimensional parametric structural computational models to analyze the impact of slab thickness and column size

in the phenomenon of punching shear. The models are based on a centrally located column in a slab panel
measuring 250 x 250 mm. The space of solutions for the parameters under analysis are examined to find the optimal
range for their use.