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Keywords: beam theory, higher order effects, warping, distortion, local buckling..

Summary

A higher order beam model that considers the cross-section warping together with the in-plane flexural deformation is presented in this paper. The model considers an enrichment of the displacement field so as to accurately represent the three-dimensional behaviour of thin-walled structures. The definition of an uncoupled set of deformation modes is a key feature of the model, enabling classic solutions to be retrieved (without establishing any ab-initio conditions) and to capture meaningful hierarchical higher order solutions. Toward this end, the model relies on a set of deformation modes derived with a non-linear eigenvalue problem associated with the model differential equations. A linear buckling analysis of thin-walled structures through the higher order beam model allowing local and global buckling modes to be defined is presented. A consistent criterion of uncoupling modes is verified to be an adequate model for carrying the buckling analysis of prismatic thin-walled structures with an arbitrary cross section geometry. A comparison between the results obtained with the higher order beam model and the results obtained from a shell finite element model, implemented in Abaqus, allows to concluded not only the efficiency of the beam model, but also its simplicity of use.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 106 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 158 Analysis of Local and Global Buckling of Thin-Walled Structures using a Higher Order Beam Model R.F. Vieira, F.B. Virtuoso and E.B.R. Pereira Department of Civil Engineering, Architecture and Georesources, Instituto Superior Técnico, Universidade de Lisboa, Portugal doi:10.4203/ccp.106.158 purchase the full-text of this paper Full Bibliographic Reference for this paper R.F. Vieira, F.B. Virtuoso, E.B.R. Pereira, "Analysis of Local and Global Buckling of Thin-Walled Structures using a Higher Order Beam Model", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 158, 2014. doi:10.4203/ccp.106.158 Keywords: beam theory, higher order effects, warping, distortion, local buckling.. Summary A higher order beam model that considers the cross-section warping together with the in-plane flexural deformation is presented in this paper. The model considers an enrichment of the displacement field so as to accurately represent the three-dimensional behaviour of thin-walled structures. The definition of an uncoupled set of deformation modes is a key feature of the model, enabling classic solutions to be retrieved (without establishing any ab-initio conditions) and to capture meaningful hierarchical higher order solutions. Toward this end, the model relies on a set of deformation modes derived with a non-linear eigenvalue problem associated with the model differential equations. A linear buckling analysis of thin-walled structures through the higher order beam model allowing local and global buckling modes to be defined is presented. A consistent criterion of uncoupling modes is verified to be an adequate model for carrying the buckling analysis of prismatic thin-walled structures with an arbitrary cross section geometry. A comparison between the results obtained with the higher order beam model and the results obtained from a shell finite element model, implemented in Abaqus, allows to concluded not only the efficiency of the beam model, but also its simplicity of use. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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