student profile: Mr Alberto Ferrarotti


Map

Thesis work

Thesis title: Mathematical Models for Thin-Walled Beams in the framework of Generalized Beam Theory

Supervisors: Gianluca RANZI , Peter ANSOURIAN

Thesis abstract:

Thin-Walled Beams (TWBs) are widely used in civil engineering, especially in metal structures. Because of their local deformability, TWBs behave in a substantially different way from compacts ones. This thesis is aimed to develop suitable “reduced” models for TWBs in the framework of the Generalized Beam Theory (GBT), able to well model their real behaviour both in the linear and nonlinear field, despite they involve a significantly reduced number of degrees of freedom than usual Finite Elements (FE) Models. A new straightforward dynamic approach for the GBT “cross-section analysis” of standard and composite/multi-component, arbitrarily open or multiply-connected cross-sections, is presented. The procedure is able to provide a complete and suitable set of deformation modes, including shear and extensional modes in addition to conventional ones. A consistent geometrically nonlinear model suitable for the analysis of TWBs with both open and closed cross-sections is proposed. The model enforces the Vlasov hypotheses in the nonlinear strain components by means of a suitable set of passive (slave) deformation fields directly depending on the linear ones. An energetically constrained optimization procedure based on Lagrangian multiplier methods is formalized, suitable to enforce standard and non-standard (i.e. localized and/or partial) support conditions in both linear and geometrically nonlinear fields. An extensive validation of the proposed models is performed by comparing the GBT-based results with those obtained from advanced shell FE numerical models developed in ABAQUS/Standard. Buckling and post-buckling analyses of TWBs through the proposed models are addressed. Applications on real case studies are taken into account.

Selected publications

Download citations: PDF RTF Endnote

Journals

  • Ferrarotti, A., Piccardo, G., Luongo, A. (2017). A novel straightforward dynamic approach for the evaluation of extensional modes within GBT �cross-section analysys�. Thin-Walled Structures, 114, 52-69. [More Information]

Conferences

  • Ferrarotti, A., Ranzi, G., Taig, G., Piccardo, G., Luongo, A. (2016). Partial interaction analysis of multi-component members in the framework of the GBT. 7th International Conference on Coupled Instabilities in Metal Structures (CIMS 2016), Baltimore: Johns Hopkins University.

2017

  • Ferrarotti, A., Piccardo, G., Luongo, A. (2017). A novel straightforward dynamic approach for the evaluation of extensional modes within GBT �cross-section analysys�. Thin-Walled Structures, 114, 52-69. [More Information]

2016

  • Ferrarotti, A., Ranzi, G., Taig, G., Piccardo, G., Luongo, A. (2016). Partial interaction analysis of multi-component members in the framework of the GBT. 7th International Conference on Coupled Instabilities in Metal Structures (CIMS 2016), Baltimore: Johns Hopkins University.

Note: This profile is for a student at the University of Sydney. Views presented here are not necessarily those of the University.