STUDI EFEK KONTINUITAS PADA TEKUK TORSI LATERAL BALOK TERLENTUR
ABSTRACT: Steel beams with
bending moment, have a kind of instability called lateral torsional buckling.
The critical moment of a beam depends on its length, distribution of bending
moment and on its end condition. Often, the beam is laterally supported on some
points of the beam to increase critical moment. In AISC Specification for
Structural Steel Buildings takes the lengh as the unbraced length, which means
the distance between these lateral bracing. The AISC doesnot taken into account
the influence of the parts of the beam which continuously connected to the part
of the beam which is being considered. In this research, the influence of the
other parts of the beam is studied. Calculation of critical moment is performed
using finite difference method considering the beam as a whole, with its
lateral support. A computer program is developed to performed the analysis. The
results of this study is that the when the whole beam is analysed, the critical
moments is increased significantly compared to critical momet from AISC method.
For the beam being considered in this study, the increase is up to 49%. The
conclusions of this study is that the analysis of critical moment for lateral
torsional bukling, has to be performed considering all part of the beam.
Penulis: Paulus Karta Wijaya
Kode Jurnal: jptindustridd110034
