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http://dx.doi.org/10.12652/Ksce.2013.33.1.081

Flexural Strength of HSB I-Girder Considering Inelastic Flange Local Buckling  

Cho, Eun Young (Myongji University)
Shin, Dong Ku (Myongji University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.33, no.1, 2013 , pp. 81-92 More about this Journal
Abstract
The ultimate flexural strength of HSB I-girders, considering the effect of local bucking, was investigated through a series of nonlinear finite element analysis. The girders were selected such that the inelastic local flange buckling or the plastic yielding of compression flanges governs the flexural strength. Both homogeneous sections fabricated from HSB600 or HSB800 steel and hybrid sections with HSB800 flanges and SM570-TMC web were considered. In the FE analysis, the flanges and web were modeled using thin shell elements and initial imperfections and residual stresses were imposed on the FE model. An elasto-plastic strain hardening material was used for steels. After establishing the validity of present FE analysis by comparing FE results with test results published in the literature, the effects of initial imperfection and residual stress on the inelastic flange local buckling behavior were assessed. The ultimate flexural strengths of 60 I-girders with various compression flange slenderness were obtained by FE analysis and compared with those calculated from the KHBDC, AASHTO LRFD and Eurocode 3 provisions. Based on the comparison, the applicability of design equations in these specifications for the flexural strength of I-girder considering flange local buckling was evaluated.
Keywords
HSB steel; flange local buckling; finite element analysis; flexural strength;
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