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Buckling Analysis of Thin-Walled Laminated Composite I-Beams Including Shear Deformation  

Back, Sung Yong (인제대학교 토목공학과)
Lee, Seung Sik (SK건설연구소)
Park, Yong Myung (부산대학교 토목공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.18, no.5, 2006 , pp. 575-584 More about this Journal
Abstract
In this paper, a shear-flexible finite element model is developed for the buckling analysis of axially loaded, thin-walled composite I-beams. Based on an orthogonal Cartesian coordinate system, the displacement fields are defined using the first-order shear-deformable beam theory. The derived element takes into account flexural shear deformation and torsional warping deformation. Three different types of beam elements, namely, the two-noded, three-noded, and four-noded beam elements, were developed to solve the governing equations. An inverse iteration with shift eigenvalue solution was used to solve the resulting linearized buckling problem. A parametric study was conducted to show the importance of shear flexibility and fiber orientation on the buckling behavior of thin-walled composite beams. A good agreement was obtained among the proposed shear-flexible model, other results available in literature, and the finite element solution.
Keywords
thin-waled laminate composite I-beams; orthogonal Cartesian cordinate system; shear deformation; buckling behavior; inverse iteration with shift; fiber orientation;
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