Abstract
The geometric nonlinear analysis of structures comprising members of asymmetric thin-walled open section is investigated. The geometric stiffness matrix for a thin-walled element is derived, incorporating second order nonlinear strain terms in the governing energy equations. The derived stiffness matrices are used to predict bifurcation loads of a number of structures. An updated Lagrangian formulation, coupled with the numerical arc-length technique, is employed to trace the non-linear load-deflection paths up to the maximum load. Numerical examples of the load-deflection behaviour of eccentrically loaded and restrained unequal angle beam-columns are presented.
Original language | English |
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Pages (from-to) | 243-254 |
Number of pages | 12 |
Journal | Engineering Structures |
Volume | 9 |
Issue number | 4 |
DOIs | |
Publication status | Published - 1 Jan 1987 |
Externally published | Yes |
Keywords
- asymmetry
- beam-columns
- geometric nonlinearity
- matrices
- structural analysis
- thin-wall
ASJC Scopus subject areas
- Civil and Structural Engineering