期刊
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
卷 69, 期 -, 页码 71-83出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijnonlinmec.2014.11.023
关键词
Mode interaction; Global buckling; Local buckling; Snaking; Non-linear mechanics
类别
A recently developed variational model that describes the non-linear interaction between the global and local buckling of a thin-walled I-section strut under pure compression is extended to include semi-rigid flange-web connections. A formulation combining the Rayleigh-Ritz method and continuous displacement functions is used to derive a system of differential and integral equilibrium equations for the structural component. Cellular buckling, observed in the case where the web is assumed to provide no more than a simple support to the flanges, is found to be rapidly eroded by increasing the connection rigidity, although the local buckling wavelength still reduces as the post-buckling deformation is increased. The model is validated using finite element analysis; the results compare very well particularly when a high rigidity between the section web and flanges is simulated. (C) 2014 Elsevier Ltd. All rights reserved.
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