ABSTRACT: This paper deals with the implementation of a beam finite element, suitable for the analysis of steel-concrete composite decks affected by the shear-lag in the slab, in a program for the analysis of bridges with complex static scheme, such as arch bridges, bow-string bridges and cable stayed bridges. The deck model and the relevant beam finite element are adapted in the three-dimensional space on the basis of a model previously proposed by the authors. The problems of the spatial orientation of the element and the connectivity with traditional beam and truss finite elements are discussed. A special constraint is introduced to solve the illconditioned problem due to the zero torsional stiffness and the zero flexural stiffness on the co-ordinate plane parallel to the slab. Finally, an application to a realistic arch-latticed bridge is presented in order to show the potentiality of the method.
Analysis of the shear-lag effect in composite bridges with complex static scheme by means of beam elements / Dezi, Luigino; Gara, Fabrizio; Leoni, G.; Ranzi, G.. - (2007), pp. 1151-1156. (Intervento presentato al convegno SEMC 2007 tenutosi a Cape Town, South Africa nel 10-12 September 2007).
Analysis of the shear-lag effect in composite bridges with complex static scheme by means of beam elements
DEZI, LUIGINO;GARA, Fabrizio;
2007-01-01
Abstract
ABSTRACT: This paper deals with the implementation of a beam finite element, suitable for the analysis of steel-concrete composite decks affected by the shear-lag in the slab, in a program for the analysis of bridges with complex static scheme, such as arch bridges, bow-string bridges and cable stayed bridges. The deck model and the relevant beam finite element are adapted in the three-dimensional space on the basis of a model previously proposed by the authors. The problems of the spatial orientation of the element and the connectivity with traditional beam and truss finite elements are discussed. A special constraint is introduced to solve the illconditioned problem due to the zero torsional stiffness and the zero flexural stiffness on the co-ordinate plane parallel to the slab. Finally, an application to a realistic arch-latticed bridge is presented in order to show the potentiality of the method.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
