Experimental studies of the shear behavior and strength of LiteSteel beams with stiffened web openings

Mahendran, Mahen & Poologanathan, Keerthan (2013) Experimental studies of the shear behavior and strength of LiteSteel beams with stiffened web openings. Engineering Structures, 49, pp. 840-854.

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Abstract: LiteSteel beam (LSB) is a new cold-formed steel hollow flange channel section produced using a patented manufacturing process. It is commonly used as flexural members in residential, industrial and commercial buildings. Current practice in flooring systems is to include openings in the web element of floor joists or bearers so that building services can be located within them. Test results have shown that the shear capacity of LSBs can be reduced considerably by the inclusion of web openings. A cost effective method of eliminating the detrimental effects of a large web opening is to attach suitable stiffeners around the web openings of LSBs. A detailed experimental study consisting of 17 shear tests was therefore undertaken to investigate the shear behaviour and strength of LSBs with stiffened circular web openings. Both plate and stud stiffeners with varying sizes and thicknesses were attached to the web elements of LSBs using a number of screw-fastening arrangements in order to develop a suitable stiffening arrangement for LSBs. Simply supported test specimens of LSBs with an aspect ratio of 1.5 were loaded at mid-span until failure. This paper presents the details of this experimental study of LSBs with stiffened web openings, and the results of their shear capacities and associated behavioural characteristics. Suitable screw-fastened plate stiffener arrangements have been recommended in order to restore the original shear capacity of LSBs.

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ID Code: 55953
Item Type: Journal Article
Refereed: Yes
Keywords: LiteSteel beam, Web openings, Shear tests, Shear strength, Plate stiffeners, LSB stud stiffeners, Hollow flanges, Cold-formed steel structures
DOI: 10.1016/j.engstruct.2012.12.007
ISSN: 0141-0296
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Pergamon.
Deposited On: 08 Jan 2013 05:42
Last Modified: 23 Oct 2016 02:31

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