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Steel and Composite Structures
  Volume 38, Number 1, January10 2021 , pages 67-78

Numerical study on the deflections of steel-concrete composite beams with partial interaction
Enrique Mirambell, Jorge Bonilla, Luciano M. Bezerra and Beatriz Clero

    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.
Key Words
    deflections; steel-concrete structures; partial interaction; composite beams; shear connectors
Enrique Mirambell: Department of Civil and Environmental Engineering, Polytechnic University of Catalunya, Spain
Jorge Bonilla and Beatriz Clero: Group for Numerical Methods in Engineering, University of Ciego de Ávila, Cuba
Luciano M. Bezerra: Department of Civil and Environmental Engineering, University of Brasília, Brazil

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