| Summary: | Steel profiles that are commonly used are Wide Flange shape profile.
Along with the price of steel increases relatively, utilization of castellated beam
will obtain a significant cost saving in terms of material use. This is because with
the same cross-sectional size, it will be obtained moment carrying capacity
efficiency greater than the Wide Flange shape profile.
The subject matter of this research was parametrical study of the
hexagonal openings castellated beam using 150x75x5x7 IWF profile which
enhanced to WF 225x75x5x7 profile, and analyzed with the principle of the finite
element method to determine the bending behavior. Parametrical study was
performed using the ABAQUS 6.11-2 finite element software. Analysis results of
the specimen model was verified with the results of experimental test and
theoretical calculations. If the result is closed and convergent, then create the
other models in accordance with the provisions of the design that have been
made.
The results showed that the increase in height of holes, holes spacing,
flange thickness, flange width, and web thickness tends to increase the critical
load and yield load capacity. This is because an increase in cross sectional
dimensions will increase the moment of inertia, so that the bending moment
capacity will also be greater. But on the other hand, the influence of buckling due
to the addition of cross sectional dimensions must be considered. Another result
obtained from this study is the increase in value of flange thickness apparently
contributed to the largest capacity of critical load (Pcr) and yield load (Py)
respectively 38,224 kN and 39,4055 kN. While the second largest for the addition
of critical load and yield load capacity was contributed by increased of flange
width. This is because most of the bending moments that occurred, detained by
flange section.
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