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Shear tests of hollow flange channel beams with stiffened web openings

Mahendran, Mahen & Poologanathan, Keerthan (2012) Shear tests of hollow flange channel beams with stiffened web openings. In De Wilde, W.P., Brebbia, C.A., & Hernandez , S. (Eds.) High Performance Structures and Materials 2012, WIT Press, Wessex Institute of Technology. New Forest, UK, pp. 365-376.

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Abstract

LiteSteel beam (LSB) is a new cold-formed steel hollow flange channel section produced using a patented manufacturing process involving simultaneous cold-forming and dual electric resistance welding. The LSBs are commonly used as floor joists and bearers with web openings in residential, industrial and commercial buildings. Their shear strengths are considerably reduced when web openings are included for the purpose of locating building services. Shear tests of LSBs with web openings have shown that there is up to a 60% reduction in the shear capacity due to the inclusion of web openings. Hence there is a need to improve the shear capacity of LSBs with web openings. A cost effective way to eliminate the shear capacity reduction is to attach suitable stiffeners around the web openings. Hence experimental studies were undertaken to investigate the shear behaviour and strength of LSBs with stiffened web openings. In this research, various stiffening methods using plate and LSB stiffeners attached to LSBs using both welding and screw-fastening were attempted. Our test results showed that the stiffening arrangements recommended by past research for cold-formed steel channel beams are not adequate to restore the shear strengths of LSBs with web openings. Therefore new stiffener arrangements were proposed for LSBs with web openings. This paper presents the details of this experimental study and the results including the details of the optimum stiffener details for LiteSteel beams.

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ID Code: 52788
Item Type: Conference Paper
Keywords: LiteSteel beams, web openings, hollow flanges, shear capacity, stiffeners, experiments, cold-formed steel structures
DOI: 10.2495/HPSM120321
ISBN: 9781845645960
ISSN: 1743-3509
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 Please consult the authors.
Deposited On: 26 Jul 2012 23:26
Last Modified: 03 Oct 2012 06:21

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