Experimental analysis of punching shear strength of eccentrically loaded slab with the opening along the face of the internal column

Bursać, Smilja; Bešević, Miroslav; Purčar, Martina Vojnić; Kozarić, Ljiljana; Đurić, Neđo

doi:10.1016/j.engstruct.2021.113359

Cited by 8 publications

(2 citation statements)

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“…In reinforced concrete flat slab buildings, the slab-column connections are often subject to horizontal and vertical forces and unbalanced bending moments. The punching shear failure of slab-column connections subjected to concentric loads is a crucial design aspect, and it has been the subject of study by several authors [1][2][3][4][5][6][7][8][9][10]. The application of eccentric loads, generated by different distances between columns, by unequal loads applied to the slab panel, or by the incidence of horizontal loads on the structures, results in a non-uniform distribution of shear stresses around the column, which can, in many cases, diminish the load-carrying capacity of the slab-column connection.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature, few studies address the punching resistance of flat slabs under eccentric loading. However, most of these studies [6,[11][12][13][14] focus on experimental approaches, with only the works of Zivkovic et al [4] and El-Naqeeb and Abdelwahed [15] providing a numerical assessment of this phenomenon. Zivkovic et al [4] investigated the influence of eccentric loads and openings close to the columns on the punching resistance of plain and reinforced concrete flat slabs.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Evaluation of the Punching Shear Strength of Flat Slabs Subjected to Balanced and Unbalanced Moments

Mendes,

Mesquita,

Ferreira

et al. 2024

Buildings

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In reinforced concrete flat slab buildings, the transference of unbalanced moments in the slab–column connections usually results from the asymmetry of spans, vertical loads, and horizontal forces from the wind. The punching strength of the slab–column connections can limit the load-carrying capacity of the structure in these cases, leading to structural collapse. The design code provisions are still based on empirical or semi-empirical equations; as the punching shear failure mechanisms are complex, and the ultimate strength is affected by several parameters. In this context, this paper presents the results of the computational investigation of the mechanical behaviour of flat slabs subjected to balanced and unbalanced moments using numerical Finite Element models. The numerical models were calibrated and accurately reproduced the behaviour and the punching resistance for concentric and eccentric loading. Furthermore, a parametric study was conducted to evaluate the mechanical behaviour of flat slabs under different load eccentricities, confirming that the increase in the unbalanced moment negatively impacts the load-carrying capacity of the slab–column connection. Furthermore, it was observed that all computational results obtained from models with unbalanced bending moments were higher than those estimated by the design codes.

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