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 their service design, which include the evaluation of the influence of creep and shrinkage on the stress state and deformations in-duced in the concrete slab and steel girder, and how these vary with time when the composite bridge is sub-jected to external static loads, geometrical actions and shrinkage effects. Other significant design considera-tions considered focus on how shear-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.
Design considerations on the long-term behaviour of composite steel-concrete bridges
LEONI, Graziano;
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 their service design, which include the evaluation of the influence of creep and shrinkage on the stress state and deformations in-duced in the concrete slab and steel girder, and how these vary with time when the composite bridge is sub-jected to external static loads, geometrical actions and shrinkage effects. Other significant design considera-tions considered focus on how shear-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.
