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Numerical Evaluation of Lateral-Torsional Buckling Strength in I-section Plate Girder Bridges  

Park, Yong Myung (부산대학교 사회환경시스템공학부)
Hwang, Soon Young (부산대학교 사회환경시스템공학부)
Park, Jae Bong (부산대학교 사회환경시스템공학부)
Hwang, Min Oh (RIST 강구조연구소)
Choi, Byung H. (RIST 강구조연구소)
Publication Information
Journal of Korean Society of Steel Construction / v.21, no.3, 2009 , pp. 321-330 More about this Journal
Abstract
This paper presents numerical analysis results for the lateral-torsional buckling (LTB) strength of steel I-girder bridges. Current Korean and AASHTO design specifications for LTB consider the buckling strength of a single girder with both its ends constrained. The I-girder bridges are composed of more than one girder, and the girders are interconnected with intermediate cross-beams or cross-frames. Therefore, it should be required to evaluate the effects of cross-beam stiffness and the interactionof girders on LTB strength. It is also necessary to consider the effects of transverse web stiffeners on LTB strength. By considering these parameters, a series of four-girder systemswere numerically modeled using 3D shell elements to estimate the LTB strength while considering initial imperfections and residual stresses.
Keywords
Lateral-torsional buckling; Multiple I-girders; Cross beam; Transverse web stiffener; Residual stress; Initial imperfection;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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