Steel and Composite Structures

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Numerical study on the deflections of steel-concrete composite beams with partial interaction

  • Mirambell, Enrique (Department of Civil and Environmental Engineering, Polytechnic University of Catalunya) ;
  • Bonilla, Jorge (Group for Numerical Methods in Engineering, University of Ciego de Avila) ;
  • Bezerra, Luciano M. (Department of Civil and Environmental Engineering, University of Brasilia) ;
  • Clero, Beatriz (Group for Numerical Methods in Engineering, University of Ciego de Avila)
  • Received : 2019.12.18
  • Accepted : 2020.12.31
  • Published : 2021.01.10
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Abstract

The use of composite beams with partial interaction, with less shear connectors than those required for full interaction, may be advantageous in many situations. However, these beams tend to show higher deflections compared to beams with full interaction, and codified expressions for the calculation of such deflections are not fully developed and validated. Thus, this paper presents a comprehensive numerical study on the deflections of steel-concrete composite beams with partial interaction. Efficient numerical models of full-scale composite beams considering material nonlinearities and contact between their parts have been developed by means of the advanced software ABAQUS, including a damage model to simulate the concrete slab. The FE models were validated against experimental results, and subsequently parametric studies were developed to investigate the influence of the shear connection degree and the coefficient of friction in the deflection of composite beams. The comparison of predicted deflections using reference codes (AISC, Eurocode-4 and AS-2327.1) against numerical results showed that there are still inaccuracies in the estimation of deflections for the verification of the serviceability limit state, according to some of the analyzed codes.

Keywords

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