This paper deals with the service behaviour of composite steel-concrete bridges, with particular attention devoted to how this is influenced by the time-dependent behaviour of the concrete, such as creep and shrinkage. The paper outlines some of the main aspects which need to be addressed in service design, which include the evaluation of the influence of creep and shrinkage on the stress state and deformations induced in the concrete slab and steel girder, and how these vary with time when the composite bridge is subjected to external static loads, geometrical actions and shrinkage effects. Considerations are also provided on howshear-lag effects, the shear deformability of the steel girder and different casting sequences specified during construction affect the deformations and stress distributions of a composite steel-concrete bridge over time.
Considerations on the long-term behaviour of composite steel-concrete bridges / Ranzi, G.; Leoni, G.; Dezi, Luigino; Zandonini, R.. - STAMPA. - (2013), pp. 1403-1408. (Intervento presentato al convegno SEMC 2013 – 5th International Conference on Structural Engineering, Mechanics and Computation tenutosi a Cape Town, South Africa nel 2-4 September).
Considerations on the long-term behaviour of composite steel-concrete bridges
DEZI, LUIGINO;
2013-01-01
Abstract
This paper deals with the service behaviour of composite steel-concrete bridges, with particular attention devoted to how this is influenced by the time-dependent behaviour of the concrete, such as creep and shrinkage. The paper outlines some of the main aspects which need to be addressed in service design, which include the evaluation of the influence of creep and shrinkage on the stress state and deformations induced in the concrete slab and steel girder, and how these vary with time when the composite bridge is subjected to external static loads, geometrical actions and shrinkage effects. Considerations are also provided on howshear-lag effects, the shear deformability of the steel girder and different casting sequences specified during construction affect the deformations and stress distributions of a composite steel-concrete bridge over time.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
