ANALYSIS OF LATERAL-TORSIONAL BUCKLING (WARPING) OF STEEL I-BEAM WITH INITIAL IMPERFECTION
The strength of a beam is often controlled by lateral torsional buckling boundary conditions. To calculate the type of lateral torsional buckling failure, AISC has provided equations but the equation has not taken into account the effects of initial imperfections and upper flange loading, where i...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/39865 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The strength of a beam is often controlled by lateral torsional buckling
boundary conditions. To calculate the type of lateral torsional buckling failure,
AISC has provided equations but the equation has not taken into account the
effects of initial imperfections and upper flange loading, where in practice both
of these will reduce the magnitude of the structural strength of lateral torque
buckling. This analysis study was conducted to see the effect of the initial
imperfections and the effect of loading on the beam flange on the lateral
moments of elastic and inelastic torsional bending. The elastic and inelastic
lateral torque buckling phenomenon is seen by taking into account the effect of
residual stresses carried out by collapse analysis using the finite element
method with the help of the ADINA v9.0 program. The research that has been
done has resulted that the magnitude of the reduction due to initial
imperfection is a function of the magnitude of the initial imperfection and the
length of the unfettered span, where the greater the initial imperfection it will
cause the greater the reduction of critical moments. For the lateral elastic
torque buckling conditions the increase in the length of the unfettered span will
cause a reduction in the reduction that occurs, but for the inelastic region, the
magnitude of the reduction is relatively constant with respect to the length of
the beam span. The effect of the location of loading on the upper flange, it has
been seen that the equation proposed by the SSRC Guide is suitable for use in
both elastic and inelastic lateral torsional buckling conditions |
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