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Computers and Concrete Volume 26, Number 2, August 2020 , pages 151-159 DOI: https://doi.org/10.12989/cac.2020.26.2.151 |
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Computer modeling and analytical prediction of shear transfer in reinforced concrete structures |
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Marcela N. Kataoka, Ana Lucia H.C. El Debs, Daniel de L. Araujo and Barbara G. Martins
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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. | ||
| Key Words | ||
| shear strength; finite element modeling; aggregate interlock; push-off test; Z-type specimen, numerical analysis | ||
| Address | ||
| Marcela N. Kataoka, Ana Lucia H.C. El Debs: Structural Department, Engineering School of Sao Carlos, University of Sao Paulo, Av. Trabalhador, Saocarlense, no 400, CEP: 13566-580 Sao Carlos, SP, Brazil Daniel de L. Araujo, Barbara G. Martins: School of Civil and Environmental Engineering, Federal University of Goias, Universitaria Street, no 1488, Qd 86, Setor Universitario, Goiania, GO 74605-220, Brazil | ||