A nonlinear finite element model using composite beam elements with partial interaction, previously validated by comparisons with experimental tests, is adopted in this paper to illustrate some behavioural aspects of externally prestressed steel-concrete composite beams. Particular attention is focused on the interface between steel beam and reinforced concrete slab, where the limited ductility of the shear connection may become crucial for the structural failure and a fragile premature collapse may occur.
External prestressing in steel-concrete composite bridges: effect of longitudinal forces on the shear connection
DALL'ASTA, Andrea;LEONI, Graziano;ZONA, Alessandro;
2008-01-01
Abstract
A nonlinear finite element model using composite beam elements with partial interaction, previously validated by comparisons with experimental tests, is adopted in this paper to illustrate some behavioural aspects of externally prestressed steel-concrete composite beams. Particular attention is focused on the interface between steel beam and reinforced concrete slab, where the limited ductility of the shear connection may become crucial for the structural failure and a fragile premature collapse may occur.File in questo prodotto:
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