Optimization for buckling with exact geometries

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


This paper is concerned with the structural optimization problem of minimizing the weight of a two-bar truss subject to nonlinear stability constraints to result in a degree of complexity beyond that which is expected for problems of this size. Optimization problems for stability constraints are commonly handled as generalized eigenvalue problems with the resulting designs overestimating true buckling loads by factors of up to 7.55. This paper presents an exact formulation that includes conditions for instability and optimality conditions in addition to optimal designs for symmetric cases and nonsymmetric cases using nonlinear programming. Multimember trusses are further considered and an exact displacement method of analysis developed.

Original languageEnglish
Pages (from-to)1139-1144
Number of pages6
JournalComputers and Structures
Issue number5
StatePublished - 3 Dec 1994
Externally publishedYes

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Modeling and Simulation
  • General Materials Science
  • Mechanical Engineering
  • Computer Science Applications


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