Computers and Concrete

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Parametric study on the structural behaviour of composite slim floors with hollow-core slabs

  • Spavier, Patricia T.S. (Department of Structural Engineering, The São Carlos School of Engineering, University of Sao Paulo) ;
  • Kataoka, Marcela N. (Department of Structural Engineering, The São Carlos School of Engineering, University of Sao Paulo) ;
  • El Debs, Ana Lucia H.C. (Department of Structural Engineering, The São Carlos School of Engineering, University of Sao Paulo)
  • Received : 2020.10.06
  • Accepted : 2021.11.16
  • Published : 2021.11.25
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Abstract

Steel-concrete composite structures and precast concrete elements have a common prefabrication process and allow fast construction. The use of hollow-core slabs associated with composite floors can be advantageous. However, there are few studies on the subject, impeding the application of such systems. In this paper, a numerical model representing the considered system using the FE (finite element)-based software DIANA is developed. The results of an experimental test were also presented in Souza (2016) and were used to validate the model. Comparisons between the numerical and test results were performed in terms of the load versus displacement, load versus slip, and load versus strain curves, showing satisfactory agreement. In addition, a wide parametric study was performed, evaluating the influence of several parameters on the behaviour of the composite system: The strength of the steel beam, thickness of the web, thickness and width of the bottom flange of the steel beam and concrete cover thickness on top of the beam. The results indicated a great influence of the steel strength and the thickness of the bottom flange of the steel beam on the capacity of the composite floor. The remaining parameters had limited influences on the results.

Keywords

Acknowledgement

The authors would like to express their gratitude to the CNPq (National Council for Scientific and Technological Development) and Capes (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil) for financial support and the Structures Laboratory at the Department of Structural Engineering of USP for running the tests.

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