Finite element analyses of lipped channel beams with Web openings in shear
Keerthan, Poologanathan & Mahendran, Mahen (2012) Finite element analyses of lipped channel beams with Web openings in shear. In 21st International Specialty Conference on Cold-formed Steel Structures, 24-25 October 2012, St. Louis, Mo. (In Press)
Cold-formed steel members are increasingly used as primary structural elements in buildings due to the availability of thin and high strength steels and advanced cold-forming technologies. Cold-formed lipped channel beams (LCB) are commonly used as flexural members such as floor joists and bearers. Shear behaviour of LCBs with web openings is more complicated and their shear capacities are considerably reduced by the presence of web openings. However, limited research has been undertaken on the shear behaviour and strength of LCBs with web openings. Hence a numerical study was undertaken to investigate the shear behaviour and strength of LCBs with web openings. Finite element models of simply supported LCBs with aspect ratios of 1.0 and 1.5 were considered under a mid-span load. They were then validated by comparing their results with test results and used in a detailed parametric study. Experimental and numerical results showed that the current design rules in cold-formed steel structures design codes are very conservative for the shear design of LCBs with web openings. Improved design equations were therefore proposed for the shear strength of LCBs with web openings. This paper presents the details of this numerical study of LCBs with web openings, and the results.
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|Item Type:||Conference Paper|
|Keywords:||Lipped Channel beams, Web openings, Shear capacity, Cold-formed steel structures, Finite element analyses|
|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:||02 Aug 2012 14:10|
|Last Modified:||11 Apr 2013 20:44|
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