Advances in concrete construction

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Influence of the shape of head anchors on the durability of reinforced concrete elements

  • Martinez-Echeverria, M. Jose (Department of Construction Engineering and Engineering Projects, University of Granada (UGR), Campus Universitario de Fuentenueva) ;
  • Gil-Martin, Luisa Maria (Department of Structural Mechanics, University of Granada (UGR). Campus Universitario de Fuentenueva) ;
  • Montero, Jose Rodriguez (Department of Construction Engineering and Engineering Projects, University of Granada (UGR), Campus Universitario de Fuentenueva) ;
  • Hernandez-Montes, Enrique (Department of Structural Mechanics, University of Granada (UGR). Campus Universitario de Fuentenueva)
  • Received : 2020.03.05
  • Accepted : 2020.07.07
  • Published : 2020.07.25
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Abstract

This paper looks into how the shape of headed bars may influence the durability of reinforced concrete structures. Nowadays the only heads used in site works are cylindrical in shape. An alternative shape of head is studied in this piece of work. The new head reduces the concentration of stresses and so the appearance of cracks. In this work durability is studied based on both, first cracking and failure mode. An experimental campaign of 12 specimens and finite element modelling are described. The specimens were subjected to an accelerated corrosion process using an electrical current supply. Direct current was impressed on the specimens until breaking. Test results and the results obtained from numerical models are presented. Results are presented in term of comparison between the two shapes of heads studied. It was shown that the shape of the head has a significant influence on durability of reinforced concrete structures with headed reinforcing bars.

Keywords

Acknowledgement

Authors thank the support of ERSI group during the development of this research. The authors gratefully acknowledge the contribution of Prof. J.F. Carbonell-Márquez from the University of Córdoba in developing the FE models presented in this paper. The authors would also like to thank Laboratory Engineer Andrés Gil for his help during the casting and testing operations.

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