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Steel and Composite Structures
  Volume 2, Number 2, April 2002 , pages 85-98

Influence of viscous phenomena on steel-concrete composite beams with normal or high performance slab
M. Fragiacomo, C. Amadio and L. Macorini

    The aim of the paper is to present some results about the influence of rheological phenomena on steel-concrete composite beams. Both the cases of slab with ormal and high performance concrete for one and two-span beams are analysed. A new finite element model that allows taking into account creep, shrinkage and cracking in tensile zones for concrete, along with non-linear behaviour of connection, steel beam and reinforcement, has been used. The main parameters that affect the response of the composite beam under the service load are highlighted. The influence of shrinkage on the slip over the supports is analysed, together withrnthe cracking along the beam. At last, by performing a collapse analysis after a long-term analysis, the influence of rheological phenomena on the ductility demand of connection and reinforcement is analysed.
Key Words
    composite beams, steel, concrete, high performance concrete, creep, shrinkage, rheological
Department of Civil Engineering, University of Trieste, Piazzale Europa 1, 34127 Trieste, Italy

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