RESEARCH ARTICLE
Flexural Capacity of Locally Buckled Steel I-Beams Under Moment Gradient
Amin Mohebkhah*, 1, Behrouz Chegeni2
Article Information
Identifiers and Pagination:
Year: 2013Volume: 7
First Page: 244
Last Page: 250
Publisher ID: TOBCTJ-7-244
DOI: 10.2174/1874836801307010244
Article History:
Received Date: 3/11/2013Revision Received Date: 18/12/2013
Acceptance Date: 18/12/2013
Electronic publication date: 30/12/2013
Collection year: 2013
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Abstract
Lateral-torsional buckling (LTB) and flange local buckling (FLB) are treated as two independent phenomena in AISC-LRFD 360-10 in which the flexural capacity of locally buckled beams is determined as the minimum value obtained for the limit states of LTB and FLB. A 3-D nonlinear finite-element model using ABAQUS is developed in this research to investigate the interactive flexural capacity of steel I-beams with compact web under moment gradient. It was found that the AISC approach is adequate for beams with compact or noncompact sections, however, too conservative for beams with slender flanges representing a considerable interaction between LTB and FLB limit states.