Exact dynamic stiffness for axial-torsional buckling of structural frames

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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  • A. Y T Leung


Original languageEnglish
Pages (from-to)1-10
Journal / PublicationThin-Walled Structures
Issue number1
Publication statusPublished - Jan 2008


A dynamic axial-torsion buckling theory is proposed for analysis in structural mechanics. Second order effects of the axial force and torque are considered. The consistent natural boundary moments and forces are given to ensure the symmetry of the dynamic stiffness matrix in fulfilling the requirement of the reciprocal theorem. The exact dynamic stiffness matrix is obtained for the first time using power series expansion. Generally distributed axial force can be analyzed without difficulty. It is pointed out that non-uniform sections may not be effectively analyzed due to the convergent problem. The interaction diagrams due to vibration frequency, axial force and torque are studied in details. © 2007 Elsevier Ltd. All rights reserved.

Research Area(s)

  • Beam column, Exact dynamic stiffness, Interactive axial-torsional buckling, Power series