Study on Flexural Buckling Curves for Hot Finished Hollow Sections
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Date
2018-03
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Publisher
AAU
Abstract
This work focuses mainly on the resistance of members to flexural buckling according to
Eurocode 3. The work provides the mathematical backgrounds to the equations and
buckling curves presented in Eurocode 3. The work also attempts to reveal how material
behavior and residual stress influence the flexural buckling resistance which is
demonstrated through finite element (FE) simulations.
The work presents modeling and analysis on hollow section columns in ABAQUS 6.14.
Linear and non-linear buckling analyses of the hollow section columns, with the
imperfections, are implemented in this work. Specifically, the imperfections considered in
this study are material plasticity, initial bow and residual stress.
It was found that mesh size influences buckling behavior. Elastic-plastic with a strain
hardening slope of E/100 gives a little higher buckling load but did not significantly affect
the results. Residual stresses influence buckling behavior. Both material behavior and
residual stresses influence reduce when the column heights increases. The rectangular
section has high buckling curve than that of square section with same slenderness ratio.
The minor axis have high buckling curve when the ratio of height to width(h/b) of cross
sections high but the major axis buckling have the same buckling curves given in
Eurocode 3.
Description
Keywords
Finite element analyses, Buckling curves, Eurocode 3, Flexural buckling, Geometric imperfection, Linear-buckling analysis, Residual stress, Hollow sections