Incremental viscoelastic analysis of composite beams with partial interaction
This paper is concerned with the time-dependent analysis of steelconcrete composite beams under service conditions. The new proposed beam model accounts for the slip at the deckgirder interface and for the time-dependent behavior of the concrete according to the incremental formulation of the linear viscoelasticity. Over each time interval, the increment of the mechanical response of the structural member is governed by a linear second-order differential equation analogous to the one of the elastic case, with a theoretical solution. The proposed model is finally validated by means of a numerical comparison with the general integral formulation and an experimental verification.
steelconcrete composite beams slip creep shrinkage aging incremental formulation of linear viscoelastic theory