Local effects on the shear connection of composite beams, induced by concentrated longitudinal forces applied on the concrete slab or on the steel beam, are considered. The longitudinal forces can be constituted by the anchorage forces of prestressing cables, both internal and external, by the interactions arising at the upper joints of truss webs or by the fictitious forces defined in solving the problems of concrete shrinkage and uniform thermal action on the slab. By adopting a composite beam model with flexible shear connection, the problem can be solved in closed form by obtaining the longitudinal shear force distribution at beam-slab interface. Results of a wide parametric analysis and comparisons with deign rules of ENV 1994-2 are reported. Finally the creep effects are considered and the time dependent variation of the longitudinal shear force is evaluated.
Local effects of concentrated longitudinal forces in composite beams
LEONI, Graziano
1997-01-01
Abstract
Local effects on the shear connection of composite beams, induced by concentrated longitudinal forces applied on the concrete slab or on the steel beam, are considered. The longitudinal forces can be constituted by the anchorage forces of prestressing cables, both internal and external, by the interactions arising at the upper joints of truss webs or by the fictitious forces defined in solving the problems of concrete shrinkage and uniform thermal action on the slab. By adopting a composite beam model with flexible shear connection, the problem can be solved in closed form by obtaining the longitudinal shear force distribution at beam-slab interface. Results of a wide parametric analysis and comparisons with deign rules of ENV 1994-2 are reported. Finally the creep effects are considered and the time dependent variation of the longitudinal shear force is evaluated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
