TUBULAR MEMBERS. II: LOCAL BUCKLING AND EXPERIMENTAL VERIFICATION

The capacity of tubular members under combined loading due to external pressure and bending is summarized in this paper. A nonlinear finite-element method is used, which is outlined in a companion paper. Three-dimensional analyses are conducted towards the study of the effects of localized deformation. To confirm the validity of the analytical method, calculations are derived and compared with data from long-column and stub-column tests. Two-dimensional calculations provide accurate estimates of the bending capacity of long, unstiffened tubes. However, three-dimensional effects must be considered when dealing with short tubes. Short tubes undergo substantial inelastic deformation prior to buckling at a level of moment higher than the plastic moment. The presence of external pressure reduces the bending capacity and ductility of tubular members. Finally, the analytical results illustrate the beneficial effects of capped-end compression on the pressure capacity of stub tubes.

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  • English

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  • Accession Number: 00715342
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 12 1996 12:00AM