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Buckling Analysis of Pultruded Members under Axial Compression  

Lee, Seung Sik (SK건설(주) 연구소)
Back, Sung Yong (인제대학교 토목공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.18, no.5, 2006 , pp. 615-624 More about this Journal
Abstract
In the present paper, an extended composite beam theory that has no restriction on the lay-up and can account for Poisson effect which is significant for composite materials is proposed. Buckling equations for composite thin-walled members which are subjected to axial compression are derived based on the composite beam theory. In order to check the validity of the derived buckling equations, the results of experiments on the flexural-torsional buckling of vinylester/E-glass and polyester/E-glass pultruded T-section members and the flexural buckling of vinylester/E-glass pultruded H-section members are used as numerical examples. The comparison of the analytical results to the experimental and FE analysis results reveals that the proposed buckling equations predict the buckling loads of pultruded members conservatively by about 7%.
Keywords
buckling; beam theory; pultrusion; composite materials; Ritz method;
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