ABSTRACT: This paper presents a novel analytical formulation for the analysis of composite beams with longitudinal and vertical partial interaction which accounts for time and shear-lag effects. The particularity of this model relies on the ability of the interface connection to deform both longitudinally and vertically, i.e. transverse to the connection interface. All materials are assumed to be linear-elastic except for the concrete, whose time-dependent behaviour, is modeled by means of a step-by-step procedure. The theoretical model is derived using both the principle of virtual work and, relying on the weak form of the problem, the finite ele-ment method. Their ability to accurately depict the partial interaction behaviour is then discussed using simple structural systems. Curvature locking problems, which have been observed in the finite element simulations, are discussed and their origins are demonstrated analytically.
Longitudinal and transverse partial interaction analysis of composite beams accounting for time effects and shear-lag effects / P., Ansourian; G., Ranzi; Gara, Fabrizio; G., Leoni. - (2006), pp. 149-155. (Intervento presentato al convegno 19th Australasian Conference on the Mechanics of Structures and Materials, ACMSM’06 tenutosi a Christchurch, New Zealand nel 29 November - 1 December 2006).
Longitudinal and transverse partial interaction analysis of composite beams accounting for time effects and shear-lag effects
GARA, Fabrizio;
2006-01-01
Abstract
ABSTRACT: This paper presents a novel analytical formulation for the analysis of composite beams with longitudinal and vertical partial interaction which accounts for time and shear-lag effects. The particularity of this model relies on the ability of the interface connection to deform both longitudinally and vertically, i.e. transverse to the connection interface. All materials are assumed to be linear-elastic except for the concrete, whose time-dependent behaviour, is modeled by means of a step-by-step procedure. The theoretical model is derived using both the principle of virtual work and, relying on the weak form of the problem, the finite ele-ment method. Their ability to accurately depict the partial interaction behaviour is then discussed using simple structural systems. Curvature locking problems, which have been observed in the finite element simulations, are discussed and their origins are demonstrated analytically.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
