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.

A beam finite element including shear-lag effect for the long term analysis of steel-concrete composite decks

DEZI, LUIGINO;GARA, Fabrizio;
2005

Abstract

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11566/63587
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