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Improved shear design rules for lipped channel beams with web openings

By Keerthan Poologanathan and Mahen Mahendran


Cold-formed steel Lipped Channel Beams (LCB) with web openings are commonly used as floor joists and bearers in building structures. The shear behaviour of these beams 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 detailed numerical study was undertaken to investigate the shear behaviour and strength of LCBs with web openings. Finite element models of simply supported LCBs under a mid-span load with aspect ratios of 1.0 and 1.5 were developed and validated by comparing their results with test results. They were then used in a detailed parametric study to investigate the effects of various influential parameters. Experimental and numerical results showed that the current design rules in cold-formed steel structures design codes are very conservative. Improved design equations were therefore proposed for the shear strength of LCBs with web openings based on both experimental and numerical results. This paper presents the details of finite element modelling of LCBs with web openings, validation of finite element models, and the development of improved shear design rules. The proposed shear design rules in this paper can be considered for inclusion in the future versions of cold-formed steel design codes

Topics: 090506 Structural Engineering, Lipped channel beams, Web openings, Shear capacity, Cold-formed steel structures, Finite element analyses, Design rules
Publisher: Elsevier
Year: 2014
DOI identifier: 10.1016/j.jcsr.2014.01.011
OAI identifier: oai:eprints.qut.edu.au:60810

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  1. (1997). Behaviour of Web Elements with Openings Subjected to Linearly Varying Shear, Masters Thesis,
  2. (1978). Cold-formed Steel Beam Webs Subjected Primarily to Shear,
  3. (1997). Cold-formed Steel Webs with Openings: Summary report, Thin-Walled Structures,
  4. (1998). Computational Modeling of Cold-formed Steel: Characterizing Geometric Imperfections and Residual Stresses,
  5. (2010). Direct Strength Method (DSM) of Design of Cold-formed Sections in Shear and Combined Bending and Shear, PhD Thesis,
  6. Experimental Investigation of High Strength CSections in Combined Bending and Shear,
  7. (2013). Experimental Studies of the Shear Behaviour and Strength of Lipped Channel Beams with Web Openings, Thin-Walled Structures.
  8. (2013). New Design Rules for the Shear Strength of LiteSteel Beams with Web Openings,
  9. (2011). New Design Rules for the Shear Strength of LiteSteel Beams,
  10. (2007). North American Specification for the Design of Cold-formed Steel Structural Members,
  11. Numerical Simulation of High Strength Coldformed Purlins in Combined Bending and Shear,
  12. (2008). OneSteel Australian Tube Mills,
  13. (2006). Preliminary Investigation into the Structural Behaviour of LSB Floor Joists Containing Web Openings, Research Report,
  14. (1995). Research into Cold-Formed Steel Perforated C-Sections in Shear,
  15. (2008). Shear Capacity of LiteSteel Beams with Circular Web Openings,
  16. (1982). Shear Capacity of Thin Web Plate Girders with Perforations,
  17. (2005). Standards Australia/Standards New Zealand

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