Shear Tests Of Hollow Flange Channel Beams With
Stiffened Web Openings
Author(s)
M. Mahendran & P. Keerthan
Abstract
LiteSteel beam (LSB) is a new cold-formed steel hollow flange channel section
produced using a patented manufacturing process involving simultaneous coldforming
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 coldformed
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.
Keywords: LiteSteel beams, web openings, hollow flanges, shear capacity,
stiffeners, experiments, cold-formed steel structures.
Keywords
LiteSteel beams, web openings, hollow flanges, shear capacity,
stiffeners, experiments, cold-formed steel structures.
Related Book
Other papers in this volume
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