GBT-based assessment of the buckling behaviour of cold-formed steel purlins restrained by sheeting

Author(s)

Basaglia, Cilmar ^[1] ; Camotim, Dinar ^[2] ; Goncalves, Rodrigo ^[3] ; Graca, Andre ^[2]

Affiliation

^[1] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Struct Engn, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Tecn Lisboa, Inst Super Tecn, ICIST, Dept Civil Engn & Architecture, P-1049001 Lisbon - Portugal

^[3] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Civil Engn, UNIC, P-2829516 Caparica - Portugal

• Document type: Journal article
• Source: THIN-WALLED STRUCTURES; v. 72, p. 217-229, NOV 2013.
• Web of Science Citations: 15

Abstract

This paper presents and discusses the results of a GBT-based numerical investigation concerning the local, distortional and global buckling behaviour of lipped channel and zed-section cold-formed steel purlins restrained by steel sheeting and subjected to an uplift loading. Strengthened (lapped) joints, commonly employed at internal supports to preclude the occurrence of local/distortional buckling phenomena, are also investigated and an illustrative application of the use of GBT to determine strengthening lengths is also presented. The sheeting restraint is modelled by means of elastic translational and rotational springs, located at the purlin upper flange, and the joint strengthening is modelled by doubling the cross-section wall thickness. For validation, the GBT-based results are compared with values yielded by ANSYS shell finite element analyses. (C) 2013 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 11/17557-2 - New Developments and Applications of the Generalised Beam Theory for Metal Structures: Plasticity, Vibration and Software
• Grantee: Cilmar Donizeti Basaglia
• Support Opportunities: Scholarships in Brazil - Post-Doctoral