Shear behaviour and design of LiteSteel Beams

This research has described a detailed investigation into the shear behaviour of LiteSteel Beams (LSBs). Experimental and finite element analyses were undertaken to gain a good understanding and knowledge of LiteSteel beams with and without web openings under shear.

Finite element models of LSBs with and without web opening in shear were developed to investigate the ultimate shear strength behaviour of LSBs including their elastic and post-buckling characteristics. They were validated by comparing their results with shear test results. Both the experimental and FEA parametric study results showed that the current design rules in cold-formed steel design codes are very conservative for the shear design of LSBs with and without web openings. New shear design equations including direct strength method (DSM) for LSBs with and without web openings were proposed based on the experimental and FEA parametric study results.

This research has shown that the current shear design rules are overly conservative and hence recommended new shear design rules for possible inclusion in national and international steel design standards.