Análisis paramétrico mediante elementos finitos de losas de hormigón armado reforzadas frente a punzonamiento

Abstract

In this paper, ABAQUS is used to analyse a series of non-linear numerical models to simulate the punching shear effect on reinforced bolt-retrofitted concrete flat slabs whose bolts are arranged in three different positions around the support. To start with, an initial calibration of a finite element model was carried out with experimental results reported by Adetifa and Polak. Next, a parametric analysis was performed to determine the influence of the retrofitting geometrical parameters. For this purpose, over two hundred models were created with the help of an automation algorithm programmed in Python. Our parametric study shows that a shear-bolt radial layout may be most adequate for retrofitting slab-to-column connections in which the phenomenon of punching shear is likely to occur. Moreover, the distance between the first pair of bolts and the column’s face is recommended to be approximately five times the diameter of the shear bolts.