New Developments and Applications of the Generalised Beam Theory for Metal Structures: Plasticity, Vibration and Software

• Grant number: 11/17557-2
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: March 01, 2012
• End date: September 30, 2013
• Field of knowledge: Engineering - Civil Engineering - Structural Engineering
• Principal Investigator: Humberto Breves Coda
• Grantee: Cilmar Donizeti Basaglia
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

This post-doctoral research project involves the development of formulations and numerical implementations (beam finite elements) based on Generalised Beam Theory (GBT), intended to analyse the structural behaviour of frames and trusses formed by open and/or tubular cross-section thin-walled metal members. The objective is to develop new formulations/implementations that are able to perform first-order (linear), buckling (i.e., equilibrium bifurcation), vibration and post-buckling (non-linear geometric analysis with geometric imperfections) analyses, in the elastic and/or elastic-plastic domains. The developed finite elements will be applied to investigate the local, distortional and global behaviours of plane and space frames and trusses acted by arbitrary loadings, with various joint configurations and bracing systems. In order to contribute to the dissemination of the use of GBT, a user-friendly computer code will be developed and made available online as freeware. This software will perform (i) first-order elastic-plastic analysis and (ii) buckling, post-buckling and vibration elastic analyses of frames and trusses. Most GBT-based results will be validated through the comparison with values yielded by rigorous shell finite element analyses and/or experimental results available in the literature. Finally, taking advantage of the GBT modal nature, one aims to propose and/or contribute to the development of new rules, procedures and design methodologies leading to a better understanding of the structural behaviour of frames/trusses and, therefore, allowing engineers to design these structures in a more effective and rational manner.

Scientific publications

(8)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BASAGLIA, CILMAR; CAMOTIM, DINAR; CODA, HUMBERTO. Behaviour, failure and DSM design of cold-formed steel beams: Influence of the load point of application. THIN-WALLED STRUCTURES, v. 81, n. SI, p. 78-88, AUG 2014. (11/17557-2, 11/15731-5)

BASAGLIA, CILMAR; CAMOTIM, DINAR; CODA, HUMBERTO BREVES. Generalised beam theory (GBT) formulation to analyse the vibration behaviour of thin-walled steel frames. THIN-WALLED STRUCTURES, v. 127, p. 259-274, JUN 2018. (11/17557-2, 11/15731-5)

BASAGLIA, CILMAR; CAMOTIM, DINAR; GONCALVES, RODRIGO; GRACA, ANDRE. GBT-based assessment of the buckling behaviour of cold-formed steel purlins restrained by sheeting. THIN-WALLED STRUCTURES, v. 72, p. 217-229, NOV 2013. (11/17557-2)

BASAGLIA, CILMAR; CAMOTIM, DINAR; SILVESTRE, NUNO. Post-buckling analysis of thin-walled steel frames using generalised beam theory (GBT). THIN-WALLED STRUCTURES, v. 62, p. 229-242, JAN 2013. (11/17557-2)

CAMOTIM, DINAR; BASAGLIA, CILMAR. On the behaviour, failure and direct strength design of thin-walled steel structural systems. THIN-WALLED STRUCTURES, v. 81, p. 17-pg., 2014-08-01. (11/17557-2)

CAMOTIM, DINAR; BASAGLIA, CILMAR. On the behaviour, failure and direct strength design of thin-walled steel structural systems. THIN-WALLED STRUCTURES, v. 81, n. SI, p. 50-66, AUG 2014. (11/17557-2)

CAMOTIM, DINAR; BASAGLIA, CILMAR. Buckling analysis of thin-walled steel structures using generalized beam theory (GBT): state-of-the-art report. STEEL CONSTRUCTION-DESIGN AND RESEARCH, v. 6, n. 2, p. 15-pg., 2013-05-01. (11/17557-2)

BASAGLIA, CILMAR; CAMOTIM, DINAR; CODA, HUMBERTO. Behaviour, failure and DSM design of cold-formed steel beams: Influence of the load point of application. THIN-WALLED STRUCTURES, v. 81, p. 11-pg., 2014-08-01. (11/17557-2, 11/15731-5)