Testing and finite element analysis of reinforced concrete column footings failing by punching shear

Experimental Investigation of RC Footings Resting on Sand Strengthened with Concrete Jacketing

“…In 1990, Mosley [9] demonstrated the contact stresses distribution beneath a typical rigid footing resting on sand as shown in Figure 1. In 2015, Todor Vacev [10] investigated the punching behavior of rigid isolated RC column footings, subjected to concentric loading, resting on sandy soil, and found that the stress distribution beneath the footing was different from the theoretical assumption. However, the stresses were concentrated under center of the footing.…”

Punching Behaviour of Reinforced Concrete Footings at Testing and According to Eurocode 2 and fib Model Code 2010

“…Further on, in the second phase (from approximately 150 kN for footings F6 and F9), one may notice stagnation of the settlement of the footing corner, while the settlement of the column stub continues to grow faster with the increase of the applied force, which leads to the deflection of the footing. The footing deflection and crack development (Vacev et al 2015) continues until the load value reaches 300 kN in footing F6, and approximately 600 kN in footing F9. In the third phase the settlement of the footing corner rests, while the settlement of the column progresses more intensely as the load level increases.…”

“…This phase continues until the load value reaches 400 kN in footing F6 and 700 kN in footing F9. At those load levels the fourth phase starts, and also the last stage of punching, when the settlement of the column grows very fast, the cracks and crushings are spread through the whole footing volume, and the final punching occurs (Vacev et al 2015).…”

“…Concentrated load often causes high shear stresses in the loading zone, which may lead to the nonductile, sudden and brittle punching failure that was widely investigated at different kinds of structures, and especially at punching of flat slabs (Belletti et al 2015a;Bonić et al 2010;Brooms 2005; Fédération Internationale du Béton (fib) 2010; Hallgren and Bjerke 2002;Hallgren et al 1998;Halvonik et al 2016;Hegger et al 2006Hegger et al , 2007Hegger et al , 2009Husain et al 2017;Kabir et al 2016;Kee and Nam 2015;Kumer and Hoque 2015;Menetrey 2002;Muttoni and Schwartz 1991;Muttoni 2008;Muttoni andFernández 2008, 2012;Olson (1989Olson ( /2003 ;Pbdrby 1967;Simões et al 2016a, b;Talbot 1913;Timm 2003;Urban et al 2013;Vacev et al 2015). There are several models of punching of slabs and footings and calculation methods but none of them was generally accepted, so there exist significant differences regarding the determination of the position of the critical control perimeter in which the control of the of punching should be conducted, as well as regarding the quantification of the influences of the main parameters that affect the punching.…”

Prediction of Punching Strength of Reinforced Concrete Footings by Finite Element Method

“…al. (2015) [13] made one experimental test sample of dimensions (850×850×125) mm of isolated reinforced concrete (RC) column footings rested on sub-grade soil and loaded until failure. The aim of the study was to determine the behavior of footing's punching failure and comparing it with the result obtained from finite element analysis using ANSYS software.…”