This paper presents a simplified procedure to account for shrinkage and casting sequence effects in the time-dependent analysis of steel-concrete composite continuous decks. Main features related to modelling of early-age concrete behaviour and tensile creep are discussed. The proposed simplified method is applied to evaluate the service response of a realistic three-span composite bridge deck by considering different slab casting sequences. The comparison between the obtained results and those given by the step-by-step procedures shows the accuracy of the simplified method, which can be considered a useful tool for practical applications. The numerical simulations highlight how the various casting sequences affect the development of tensile stresses in the slab.
Simplified analysis of shrinkage and casting sequence effects in composite bridge decks
LEONI, Graziano;
2011-01-01
Abstract
This paper presents a simplified procedure to account for shrinkage and casting sequence effects in the time-dependent analysis of steel-concrete composite continuous decks. Main features related to modelling of early-age concrete behaviour and tensile creep are discussed. The proposed simplified method is applied to evaluate the service response of a realistic three-span composite bridge deck by considering different slab casting sequences. The comparison between the obtained results and those given by the step-by-step procedures shows the accuracy of the simplified method, which can be considered a useful tool for practical applications. The numerical simulations highlight how the various casting sequences affect the development of tensile stresses in the slab.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
