OPTIMAL DESIGN OF SYMMETRIC STRUCTURES AGAINST POSTBUCKLING COLLAPSE

Bars, trusses, beams, plates and other "strictly symmetric" structures have been shown previously to buckle under increasing loads, which often approach limiting values as buckling progresses. These collapse loads represent a more reasonable design criterion than the initial buckling loads since unavoidable imperfections often make the latter entirely meaningless, but do not affect extended postbuckling behaviour. The equations governing optimal design against collapse are developed and shown to be somewhat simpler than the equations governing optimum buckling strength. They are applied to the example of a fixed-fixed beam, which buckles laterally and torsionally and which collapses under a load which is about one third greater than its buckling load. This collapse load can in turn be increased substantially if optimal rather than prismatic design is selected.(a) /TRRL/

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  • Corporate Authors:

    Pergamon Press, Incorporated

    Maxwell House, Fairview Park
    Elmsford, NY  United States  10523
  • Authors:
    • Masur, E F
  • Publication Date: 1978

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Filing Info

  • Accession Number: 00184406
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jan 13 1979 12:00AM