A simplified model for buckling mechanism in lattice structures

Hopkins R.W., Meek J.L. and Al-bermani F.A. (1995) A simplified model for buckling mechanism in lattice structures. Computers and Structures, 57 4: 745-750. doi:10.1016/0045-7949(95)00057-N

Author Hopkins R.W.
Meek J.L.
Al-bermani F.A.
Title A simplified model for buckling mechanism in lattice structures
Journal name Computers and Structures   Check publisher's open access policy
ISSN 0045-7949
Publication date 1995-11-17
Sub-type Article (original research)
DOI 10.1016/0045-7949(95)00057-N
Volume 57
Issue 4
Start page 745
End page 750
Total pages 6
Subject 1706 Computer Science Applications
2205 Civil and Structural Engineering
2210 Mechanical Engineering
2500 Materials Science
2611 Modelling and Simulation
2206 Computational Mechanics
Abstract This paper presents a simplified model of buckling mechanism which occurs in slender steel column elements under compressive axial loading. This model has been used to predict buckling capacities of certain structures, and comparisons have been made with test results. The method presented is not as accurate as the current finite element methods which use complete large displacement elasto-plastic analysis. However, it provides a reasonable upper bound load very economically, and with reasonable accuracy. It will be argued that it is pointless striving for a 1% accuracy when material parameters and load target values themselves can only be accurate to, say, 10%. The study has used software developed by Meek [3DBUCKLE-eigenvalue analysis program for buckling of steel columns, University of Queensland (1973)], which uses eigenvalue analysis by iteration to determine the Euler (theoretical) value of the buckling load of a column structure. This program was adapted to include the possibility that, during buckling, a reduced modulus section develops at the central portion of the critical column length. The reduction in the second moment of area of the section over a given length ensures that the revised estimate of the failure load is less than that predicted by the Euler formula for the undamaged column. The program was used to predict the failure loads of structures previously tested in other research programs, and the results show reasonable agreement with experiment. The paper shows the potential of the method as a simple design tool.
Q-Index Code C1
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
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