Development Of Optimization Of Steel Castella As The Steel Beams Construction
ABSTRACT: Beam castella
(castellated Beam) is formed by beams of profile H-beam, i-beam or wide flange
beam used for construction of long span more than 8 meters by modifying the '
web ' of her being higher than the original profile. The web part is cut with a
pattern of castella and then hooked up again with the way las. The result of
the merged profile pieces will form holes with 3 shapes: hexagon (honey comb),
rhombi, and circles (circular). These profiles are perforated to minimize the
weight of its own profile. Castellated beam profile can be used for beams, the
eastern limit of block length either as on the roof. With the overhaul of the
steel changes and becomes a form of castella will experience a reduction in the
weight of the steel itself and increase the height of the steel profile
according to the desired.
This research was conducted to determine the influence of angle (Ø), high
(h) and width (e) profile-pieces of steel beams on elastic behavior of castellated
beam. This study applies the model of castellated beam horizontal zig-zag
profile test objects with WF 200.100.5.5.8. WF intact then formed steel
castella with angle, height and width of the cutting profile is different for
each test object. The test objects to cutting corners the profile treatment
namely Ø1 = 0˚ (whole), Ø2 = 45˚, Ø3=
50˚, Ø4 = 60˚, Ø5 = 65˚, Ø6= 70˚ and
Ø7=75˚. The test objects for high profile cutting treatment i.e., h1 = 0
mm (whole), h2 = 26 mm wide, h3=50 mm, h4=76mm, h5=102, 5 mm, and h6 = 150 mm.
width of the treatment to test objects are pieces of profile (e) i.e. estd =
51, 25 mm, e0 = 0 (intact), e1 = 177 mm, e2 = 150 mm, e3 = 125 mm, e4= 50 mm,
and e5 = 75 mm. castellated steel beam testing Systems conducted in the
laboratory is by giving a load of centered around the Middle span steel beam,
and then on the test (test region) studied the behavior of steel beam while
receiving the centralized load by using the tool hidrolic jack. Quality steel
voltage is the voltage that occurs at the time before starting to melt. To find
out the quality of steel (fy) then pull-test test will be performed, i.e. by
taking a sample of steel profiles to test his steel quality.
The results showed that at the melting condition and collapsed, cutting
the corner profile (Ø) is not too influential to the strength of flexure, there
was a rise in the value of this banding if large corner profile is getting
bigger but the accession was not significant. When are reviewed from the angle
of the cutting profile buckling condition (Ø) affects to the buckling, the
greater the angle of the cutting profile (Ø) showed a trend of buckling that
occurs is getting smaller. The results showed on the conditions of yielt and
collapsing, cutting height profile (h) affect the strength of the flexure, the
more high profile then the greater the strength of the flexure. When are
reviewed from a high profile cutting of buckling condition (h) affect to the
buckling, the more high profile cutting (h) there is a tendency that happens
the greater the buckling. Whereas in terms of the width of the cutting profile
(e), affects the value of buckling, the width of the cutting profile (e) then
the greater the value of buckling. Based on the results of the study treatment
angle profile pieces (Ø) on the most optimal castella steel when are reviewed
from the moment, shear strength, buckling and deflection is the range between
the angle 45˚- 60˚ or angle must not exceed 60˚. For high-profile pieces (h) on
the most optimal castella steel recommended height pieces (h) may not exceed
50% of the high-profile intact. Is the width of the profile pieces (e) on steel
the most optimal castella is e should not be in excess of 2½ times the height
profile intact.
Keywords: Castellated beam,
the cutting angle profile (Ø) high-profile cuts, (h) and width of profile
pieces (e), strength of flexure
Penulis: agus wiyono
Kode Jurnal: jptsipildd150214
