الفهرس 
Lateral-Torsional Buckling
EXPE" ~ "NTALPROGRAMOnly 14 pages are availabe for public view
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Abstract
The design of over-hanging C-beams is not sufficiently
covered in the current standards and specifications. The
buckling length specified in the current standards and
specifications was firstly defined by Nethercot, 1973 and
covered only doubly symmetric I-sections. In this research
program, both experimental and theoretical programs were
performed to study the elastic and inelastic lateral torsional
buckling behavior of C-sections bent about the major axis. In
the experimental program, six full-scale over-hanging beams
were tested. The back-span length was 3150 mm and the overhanging
lengths were variable and had the lengths of2700, 3600
and 4500 mm. The tip of the cantilever was laterally restrained
top and bottom flanges. The cross section considered in the
test program was UPN160 and UPN260. The root (intermediate)
support was laterally restrained at the bottom flange only while
the end support was laterally restrained at top and bottom
flanges. The specimens were subjected to a concentrated load
.applied at the top flange at the tip of the cantilever.
Standard tension tests were performed on coupons cut
from the web to determine the actual mechanical properties of .
the steel used.
A finite element model was developed to simulate the
behavior of such specimens. To include the effect of large
displacement on the behavior, a nonlinear geometric analysis