الفهرس 
LITERATURE REVIEWOnly 14 pages are availabe for public view
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Abstract
Local buckling behavior of perforated cold-formed lipped and unlipped
channels is analytically investigated. A finite element model is
developed to simulate the behavior of such channels. The finite element
model is verified by comparing its results with those obtained
experimentally from other research programs.
The developed finite element model is used to investigate the effect
of rectangular and circular web openings on the ultimate compressive
strength of both lipped and un-lipped cold-formed channel columns as
well as on the ultimate strength of perforated lipped channel beams. The
different parameters investigated in the study are the web openings
shape, size, number, location and aspect ratio.
The results of the finite element model are used to develop a
proposed design method to predict the ultimate compressive strength of
perforated Gold-farmed lipped and un-lipped channels. It was concluded
that the size and the location of the openings have a significant effect on
the ultimate compressive strength of perforated channel columns. Also
the size and the location of the openings have a signi ficant effect on the
ultimate strength of perforated channel beams subjected to pure bending
stresses, while they have an insignificant effect on the ultimate strength
of perforated channel beams subjected to combined shear and bending
stresses.