Reference Type:  Journal Article
Record Number: 1
Author: Pourshargh, Farshad, Legeron, Frederic P. and Langlois3, Sébastien
Year: 2019
Title: MODELING THE LOCAL BUCKLING FAILURE OF
ANGLE SECTIONS WITH BEAM ELEMENTS
Journal: Advanced Steel Construction 
Volume: 15
Issue: 4
Pages: 364–376
Date: Dec
Type of Article: Article
Short Title: MODELING THE LOCAL BUCKLING FAILURE OF
ANGLE SECTIONS WITH BEAM ELEMENTS
Alternate Journal: Adv. Steel Constr.
ISSN: 1816-112X
DOI: 10.18057/IJASC.2019.15.4.7
Keywords: Lattice steel tower
Angle section
Local buckling
Finite element model
Nonlinear behavior
Fiber beam element
Abstract: Slender steel sections are widely used in the construction of steel structures such as lattice structures for transmission li ne
and telecommunication towers. Local buckling may be the observed failure mode under compression loads for these slender
sections, and many experimental studies have been conducted to evaluate their resistance. All steel design codes include
equations to account for local buckling. In numerical models, local buckling can be reproduced using 2D shell or 3D
elements. Nonlinear numerical models have been developed in the last decades that can capture the complex behavior of
lattice structures up to failure. These models typically use beam elements that consider correctly the global buckling and
yielding of sections but do not consider the local buckling of angles due to geometrical limitations. This article proposes a
method that modifies the material behavior of sections to involve the local buckling failure in the analysis. Forty -two
experimental tests were conducted on short angles and a general stress-strain formula was defined based on the test results.
The formula relates the local buckling slenderness ratio of the members to a material constitutive law that accounts for the
local buckling. To evaluate the method, the numerical results were compared to those of four x-braced frame configurations
using slender angle sections. The results demonstrate that the proposed method can accurately model the local buckling
failure of fiber beam elements
Access Date: 1 Ph.D. candidate at Université de Sherbrooke, Sherbrooke, Canada
2 Eng., Ph.D. Formerly Professor, Civil Engineering Department, Université de Sherbrooke, Sherbrooke, Canada
3 Eng., Ph.D. Assistant professor, Civil Engineering Department, Université de Sherbrooke, Sherbrooke, Canada
4 Present affiliation: Vice President, Parsons, Dubai, UAE
*(Corresponding Author: Email address: Sebastien.Langlois@USherbrooke.ca)
Language: English