Parametric computational analysis for punching shear in RC slabs

M. Navarro, S. Ivorra*, F. B. Varona

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

12 Citations (Scopus)

Abstract

One of the key phenomena in flat slab structures is their punching shear behaviour. The real importance of punching shear consists of a sudden brittle fracture, which can trigger catastrophic consequences for humans. This paper presents a nonlinear numerical model based on finite elements in order to study the punching shear phenomenon of reinforced slabs. The numerical model developed has been configured with hexahedral 3D elements for concrete and linear elements (2D truss) for steel reinforcements. Constitutive equations for concrete and steel include the nonlinearity of these materials. The slab has been simulated in ABAQUS software and the model has been calibrated in comparison to experimental results developed in the University of Waterloo by Adetifa and Polak, and some additional analytical results developed by Polak, in order to validate the model. The calibration has also been contrasted with some experimental results from ACI database for punching tests. Afterwards, a parametric analysis has been performed to study the influence of different geometric and mechanical parameters which define a classic slab-column structure. This discussion also addresses the adequacy of some mechanical approaches, such as the CEB Model Code 2010.

Original languageEnglish
Pages (from-to)254-263
Number of pages10
JournalEngineering Structures
Volume165
Early online date29 Mar 2018
DOIs
Publication statusPublished - 15 Jun 2018

Keywords

  • Punching shear
  • Reinforced concrete
  • Flat slabs
  • Nonlinearity
  • Parametric analysis
  • FEM analysis
  • Concrete damaged plasticity

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