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Inelastic Buckling Behavior of I-Beam Under Uniform Bending  

Lee, Dong Sik (서울산업대학교 구조공학과)
Oh, Soon Taek (서울대학교 지진공학센터)
Publication Information
Journal of Korean Society of Steel Construction / v.16, no.1, 2004 , pp. 61-72 More about this Journal
Abstract
This study investigated the inelastic lateral-torsional buckling of simply supported beams under a central concentrated load and a uniformly distributed load. A line-type finite element, method was incorporated with the "so-called" simplified and polynomial patterns of residual stresses. The effect of the load height was also considered in this study. The polynomial residual stresses assumed in this study was a quartic distribution in the flange and a parabolic distribution in the web. The inelastic lateral-torsional buckling of beam was analyzed with four different I-sections manufactured in Korea. Results obtained in this study were compared with KSDM(design method in the 1995 Korean Steel Designers' Manual). The design method in KSDM was found to be generally conservative with and without a sub-beam attached to the main beam, which acted as an intermediate restraint.
Keywords
buckling; distortion; residual stress; yielding;
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