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Moment Gradient Factor for Lateral Torsional Buckling Strength of Monosymmetric Stepped I-beam Subjected to Uniform Moment  

Gelera, Kathleen Mae (Sangmyung University, Dept. of Civil Engineering)
Park, Jong-Sup (Sangmyung University, Dept. of Civil Engineering)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.10, no.2, 2010 , pp. 7-13 More about this Journal
Abstract
Stepped I-beams having increased moment of inertia at one end (singly stepped beam) or both ends (doubly stepped beams) can often be seen in construction of bridges due to material economy and easy fabrication of the section. This paper presents the results of the parametric study of lateral torsional buckling of monosymmetric stepped I-beams with constant depth subjected to uniform moment. Design recommendations were made based on the finite element results of the models having different combinations of monosymmetric ratio, stepped length ratio, flange thickness ratio and flange width ratio. The proposed approximation is acceptable based on the parameters given having mostly conservative results. The proposed equation can be further used to extend the study to different loading conditions.
Keywords
monosymmetric beam; stepped beam; lateral torsional buckling; moment gradient factor;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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