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Inelastic Buckling Behavior of I-Beam with Unequal End Moment  

Lee, Dong Sik (서울대학교 지진공학센터)
Oh, Soon Taek (서울산업대학교 구조공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.16, no.2, 2004 , pp. 257-265 More about this Journal
Abstract
The aim of this study is to investigate the inelastic buckling behavior of the beams under moment gradient using a line-type finite element method. The method is incorporated the non-uniform yielding of the cross-section caused by the presence of residual stress and accepted model of residual stress so called 'simplified' and 'polynomial' pattern is adopted in this study. The inelastic lateral-torsional buckling results obtained in this study is compared with the buckling results obtained from the design method based on the allowable stress method given in Korean Steel Designers Manual (KSDM 1995). This study have found that the design method in KSDM (1995) is conservative without and with intermediate bracing applied at the mid span of the beam, and there is some scope for improving the provisions of KSDM (1995)
Keywords
Buckling; Inelasticity; Line-type finite element; Moment gradient; Residual stress;
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