Shear tests of lipped channel beams with stiffened web openings
Keerthan, Poologanathan & Mahendran, Mahen (2012) Shear tests of lipped channel beams with stiffened web openings. In From Materials to Structures: Advancement through Innovation - Proceedings of the 22nd Australasian Conference on the Mechanics of Structures and Materials, CRC Press, Sydney, NSW, pp. 819-824.
Cold-formed steel lipped channel beams (LCB) are used extensively in residential, industrial and commercial buildings as load bearing structural elements. Their shear strengths are considerably reduced when web openings are included for the purpose of locating building services. Past research has shown that the shear capacities of LCBs were reduced by up to 70% due to the inclusion of these web openings. Hence there is a need to improve the shear capacities of LCBs with web openings. A cost effective way of eliminating the detrimental effects of large web openings is to attach suitable stiffeners around the web openings and restore the original shear strength and stiffness of the LCBs. Hence detailed experimental studies were undertaken to investigate the shear behaviour and strength of LCBs with stiffened web openings. Both plate and stud stiffeners with varying sizes and thicknesses were attached to the web elements of LCBs using different screw-fastening arrangements. Simply supported test specimens of LCBs with aspect ratios of 1.0 and 1.5 were loaded at mid-span until failure. Test results showed that the plate stiffeners established using AISI recommendations are inadequate to restore the shear strengths of LCBs with web openings. Hence new stiffener arrangements have been proposed for LCBs based on experimental results. This paper presents the details of this experimental study on the shear strength of lipped channel beams with stiffened web openings, and the results.
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|Item Type:||Conference Paper|
|Keywords:||Cold-formed steel lipped channel beams, Stiffened web openings, Shear strengths, experimental studies|
|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 author]|
|Deposited On:||14 Aug 2012 09:31|
|Last Modified:||18 Mar 2013 01:01|
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