Local buckling analysis of cold-formed steel webs with stiffened rectangular openings

Osgouei, Amir Jameei and Hosseinzadeh, Yousef and Ahmadi, Hamid ORCID: https://orcid.org/0000-0002-6192-6275 (2020) Local buckling analysis of cold-formed steel webs with stiffened rectangular openings. Journal of Constructional Steel Research, 167:105824. pp. 1-16. ISSN 0143-974X


The cold-formed steel members often require web openings to allow for building services such as mechanical piping, electrical wiring, and air conditioning systems pass through the ceiling and therefore reduce the building overall height and as a result, lateral forces induced on the building. Stress distribution in members with openings is different from members without holes and therefore characteristics, shape and modes of their buckling are dissimilar which results in reduced buckling capacity and ultimate strength. In order to compensate some of the lost capacity, edge and intermediate stiffeners are fabricated into the web which complicates the characteristics and buckling mode. In this study, a set of analytical solutions for the local buckling of cold-formed steel webs with rectangular openings stiffened by intermediate and edge stiffeners subjected to compression, bending and their combination is developed, and summarized. The main variables are elastic modulus, Poisson's ratio, height of openings to height of web, aspect ratio of openings, moment of inertia of intermediate and edge stiffeners to moment of inertia of reduced web section, and stress distribution gradient above or under the hole. The proposed solutions can be used for a wide range of rectangular web openings. Analyses are conducted using energy based methods and the results are compared with numerical data obtained from the commercial finite element software (Abaqus). The numerical results demonstrate that one of the eight proposed formulas with minor modification can be successfully used to predict the critical buckling stress.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 26 Jul 2022 03:58
Last Modified: 26 Jul 2022 23:31
Uncontrolled Keywords: Local buckling, Web holes, Rectangular openings, Edge stiffeners, Intermediate stiffeners, Elastic buckling, Critical stress
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400510 Structural engineering
Socio-Economic Objectives (2020): 12 CONSTRUCTION > 1202 Construction design > 120201 Civil construction design
Identification Number or DOI: https://doi.org/10.1016/j.jcsr.2019.105824
URI: http://eprints.usq.edu.au/id/eprint/50273

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