Non-linear analyssis of steel-concrete composite beams: a finite element model

Title: Non-linear analyssis of steel-concrete composite beams: a finite element model
Author(s): C. Faella, E. Martinelli, E. Nigro
Paper category : conference
Book title: International Symposium on Connections between Steel and Concrete
Editor(s): R. Eligehausen
Print-ISBN: 2-912143-25-X
e-ISBN: 2351580346
Publisher: RILEM Publications SARL
Publication year: 2001
Pages: 1185 - 1194
Total Pages: 10
Nb references: 8
Language: English

Abstract: In the scientific literature several models devoted to non-linear analysis of steel-concrete composite beams are already available. Utilising finite element models generally based on classical displacement approach, some problems may occur, as relevant discontinuities in the nodal forces, especially when non-linear behaviour of both shear connection and structural materials are considered. In this case the necessity of very fine discretization of the structural members arises.

In the present paper a different non-linear procedure is proposed, based on a finite element model derived by the extension of the "exact" solution of the Newmark’s model to the composite beam with mechanical characteristics variable along the axis. A "modified Newton-Raphson approach" is used to achieve the convergence considering also the non-linearity of shear connection, concrete and steel.

Some comparisons with other numerical procedures and experimental results, both available in the scientific literature, are also proposed and, finally, a brief discussion on the solution convergence varying the number and the types of beam-element subdivision is reported, in order to point out the effectiveness of the proposed procedure.

Online publication: 2009-12-31
Publication type : full_text
Public price (Euros): 0.00