The paper presents a beam finite element for the long-term analysis of composite decks taking into account the warping of the slab cross section and the partial shear interaction between the slab and the girders. Slab shear-lag is taken into account by means of the product of a known function, describing the shape of the slab cross section warping, and an intensity function measuring the magnitude of warping along the beam axis. Time-dependent behaviour is considered by means of an integral-type visco-elastic creep law for the concrete. The numerical solution is obtained by means of the finite element method with a 13-dof beam element and a step-by-step procedure for the evolution in time. The results of some applications show the accuracy and the capability of the proposed element.
A beam finite element including shear-lag effect for the long-term analysis of steel-concrete composite decks
LEONI, Graziano
2005-01-01
Abstract
The paper presents a beam finite element for the long-term analysis of composite decks taking into account the warping of the slab cross section and the partial shear interaction between the slab and the girders. Slab shear-lag is taken into account by means of the product of a known function, describing the shape of the slab cross section warping, and an intensity function measuring the magnitude of warping along the beam axis. Time-dependent behaviour is considered by means of an integral-type visco-elastic creep law for the concrete. The numerical solution is obtained by means of the finite element method with a 13-dof beam element and a step-by-step procedure for the evolution in time. The results of some applications show the accuracy and the capability of the proposed element.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
