Computers and Concrete

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Computer modeling and analytical prediction of shear transfer in reinforced concrete structures

  • Kataoka, Marcela N. (Structural Department, Engineering School of Sao Carlos, University of Sao Paulo) ;
  • El Debs, Ana Lucia H.C. (Structural Department, Engineering School of Sao Carlos, University of Sao Paulo) ;
  • Araujo, Daniel de L. (School of Civil and Environmental Engineering, Federal University of Goias) ;
  • Martins, Barbara G. (School of Civil and Environmental Engineering, Federal University of Goias)
  • Received : 2019.07.02
  • Accepted : 2020.07.28
  • Published : 2020.08.25
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Abstract

This paper presents an evaluation of shear transfer across cracks in reinforced concrete through finite element modelling (FEM) and analytical predictions. The aggregate interlock is one of the mechanisms responsible for the shear transfer between two slip surfaces of a crack; the others are the dowel action, when the reinforcement contributes resisting a parcel of shear displacement (reinforcement), and the uncracked concrete comprised by the shear resistance until the development of the first crack. The aim of this study deals with the development of a 3D numerical model, which describes the behavior of Z-type push-off specimen, in order to determine the properties of interface subjected to direct shear in terms cohesion and friction angle. The numerical model was validated based on experimental data and a parametric study was performed with the variation of the concrete strength. The numerical results were compared with analytical predictions and a new equation was proposed to predict the maximum shear stress in cracked concrete.

Keywords

Acknowledgement

The authors would like to thank the National Council for the Improvement of Higher Education (CAPES) and the National Council for Scientific and Technological Development (CNPq) for the financial support and the LABITECC (Laboratory of Technological Innovation in Civil Construction of the Federal University of Goiás) for running the tests.

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